Common Challenges for Screens in Mining

Mining operations place extreme demands on screening equipment, and even well-maintained screens can struggle under constant exposure to harsh conditions.

• High abrasion and rock hardness: Sharp, dense material continuously impacts the screen surface and structure, accelerating wear on media, decks, and support components. Over time, this abrasion can reduce screening accuracy and shorten equipment lifespan.
• Wet material and variable moisture content: Moisture causes material to stick together, increasing the likelihood of buildup on the screen surface and reducing effective open area. This often leads to lower throughput and inconsistent separation.
• Blinding and pegging with fines: As apertures become blocked, material flow is restricted, forcing operators to stop production for cleaning or maintenance and reducing overall efficiency.
• Large feed size variation: Screens must handle fluctuating material sizes without sacrificing performance, yet sudden changes in feed can overwhelm conventional designs and lead to uneven wear or reduced separation quality.
• Continuous, heavy-duty operation: Mining screens are expected to run with minimal downtime, making durability, reliability, and low maintenance requirements essential to maintaining productivity and controlling operating costs.

Standard Vibratory Screens: Strengths and Limitations

Incline screens are a popular choice for many dry applications. Their angled design helps move material across the deck efficiently using gravity, making them effective for high-capacity screening when moisture and fines are minimal. Horizontal screens are often used when finer separation is required. By relying more on vibration than slope to move material, they can provide better control over fines and improved stratification in certain applications. Compare inclined screens versus horizontal screens. Despite these strengths, standard vibratory screens have notable limitations. They often require frequent maintenance to address wear, tensioning, and component fatigue. Blinding and clogging are common with wet, sticky, or fine materials, leading to reduced throughput and unplanned downtime. Over time, media replacement and maintenance costs can add up, making conventional screens less cost-effective in harsh, high-abrasion, or variable mining environments.

Introducing the BIVITEC® Vibratory Screen

The BIVITEC® vibratory screen is engineered to thrive in the toughest mining conditions where conventional screens often fail. Designed to handle the most difficult materials, the BIVITEC delivers reliable performance in environments that demand continuous operation and minimal downtime. At its core, the BIVITEC uses flip-flow screening technology, a fundamentally different approach from traditional vibratory screens. Instead of relying on a rigid screen deck, this high-quality screen features flexible polyurethane screen mats that rapidly expand and contract during operation. This motion actively accelerates material off the screen surface while continuously cleaning the screen openings, preventing blinding and pegging even with wet or sticky material. Unlike conventional vibratory screens that depend on gravity, slope, or high vibration forces to move material, the BIVITEC’s flip-flow action creates high accelerations. This allows it to efficiently separate fines, handle moisture-rich material, and maintain consistent throughput without sacrificing screen life or increasing maintenance demands. Key capabilities in tough mining environments include:

• Reliable screening of wet, sticky, and fine materials
• Exceptional resistance to blinding and pegging
• Reduced wear on screen media and structural components
• Consistent performance despite fluctuating feed conditions
• Lower maintenance requirements and extended service life

By addressing the core limitations of traditional screening equipment, the BIVITEC® vibratory screen offers mining operations a durable, high-performance solution built for long-term reliability. Please feel free to contact us at AEI if you have any questions or would like to request a demo.

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Despite regular maintenance, conventional vibrating screens and trommels can often struggle with challenging materials and wear. In this article, we’ll examine the common issues associated with traditional screening equipment and explore how replacing a conventional screen with a BIVITEC can provide a more reliable, low-maintenance solution for demanding applications.

Common Signs that it’s Time to Replace Your Current Equipment

Performance and Material Separation Issues

• Consistent blinding or clogging of screen media
• Poor separation accuracy or inconsistent product sizing
• Excessive carryover of fines or contamination in finished material
• Reduced throughput compared to original capacity
• Inability to handle wet, sticky, or variable feed material

Maintenance and Reliability Problems

• Increasing frequency of breakdowns or unplanned downtime
• Rising maintenance labor hours and replacement part costs
• Repeated failures of bearings, motors, or drive components
• Structural fatigue, cracking, or warped screen frames
• Frequent screen media replacements or short media life

Operational and Cost Concerns

• High energy consumption relative to output
• Production losses due to shutdowns for cleaning or repairs
• Reliance on manual intervention to keep material flowing
• Maintenance costs approaching or exceeding the cost of upgrading

Learn how better screening equipment can help save money over time.

Safety and Compliance Risks

• Increased safety incidents during manual cleaning or repairs
• Difficulty meeting dust, noise, or environmental regulations
• Excessive vibration impacting surrounding equipment or structures
• Equipment no longer matches current production demands
• Inability to adapt to new materials, moisture levels, or tonnage
• Bottlenecks that restrict overall plant efficiency

Limitations of Traditional Vibrating Screens

Even with consistent maintenance and regular inspections, traditional trommels and vibrating screens have built-in performance limits that can’t always be overcome.

One of the most common challenges is handling wet, sticky, or highly variable materials. Conventional screens rely on fixed vibration patterns, which makes them prone to blinding, clogging, and material buildup when moisture levels change or fines increase. As a result, throughput drops, and product quality suffers.

Traditional screens also require frequent maintenance stoppages. Screen media wear, tensioning issues, and structural fatigue mean operators must routinely shut down equipment for repairs or adjustments.

As screens age, performance naturally declines. Worn components reduce screening efficiency, increase energy consumption, and limit the screen’s ability to meet tight spec requirements.

The BIVITEC Screen: A Proven Low-Maintenance Alternative

The BIVITEC® screen uses flip-flow screening technology to deliver reliable performance where conventional screening equipment falls short. Instead of relying on rigid screen media, the BIVITEC system uses flexible polyurethane mats that are tensioned and relaxed at high acceleration. This motion keeps the screen surface clean and active, allowing material to pass through efficiently without blinding or clogging.

Because of this unique design, the BIVITEC screen is especially effective at processing difficult materials with high moisture content, stickiness, or wide variations in feed. Materials that typically cause downtime on traditional screens — such as wet sand, compost, biomass, or fine aggregates — can be screened consistently without constant operator intervention.

By addressing the core limitations of standard vibrating screens, the BIVITEC system reduces maintenance demands, improves uptime, and delivers more consistent separation in demanding applications. Contact AEI to learn more about upgrading to a BIVITEC®.

The post Replacing a Conventional Screen with a BIVITEC Vibrating Screen appeared first on AEI Screens.

This article will go over the different ways that better screens can help save money over time.

Lower Maintenance Costs and Fewer Downtime Events

Few things eat into profit margins faster than unplanned downtime. Every hour your screening system is offline means lost production, idle workers, and delayed schedules. The most common operational failures in conventional screening are:

• Blinding: fine, sticky, or moist particles adhere to the screen mesh, progressively blocking the apertures
• Pegging: near-size particles become wedged in the openings
• Carryover: undersized material fails to pass through the blocked deck and contaminates the oversized product stream

Higher-quality screens are engineered to minimize these costly interruptions. For example, AEI’s BIVITEC® flip-flow screen is designed to keep material moving without clogging and blinding, even when handling difficult, high-moisture materials. That reduces the need for frequent cleaning and maintenance.

Increased Throughput and Screening Efficiency

A screen’s performance directly affects how much material your operation can process. Better screening technology can increase throughput by processing more tons per hour and improving screening accuracy. That efficiency boost reduces cost per ton and helps deliver more product in less time.

The Freedom Disc Screen – which was designed to eliminate wrapping and plugging – ensures continuous, high-capacity screening with minimal need for operator intervention.

Additionally, efficient screening reduces the amount of material that must be reprocessed or discarded, saving time and energy while improving the overall quality of the final product.

Optimized Energy and Water Efficiency

Inefficient screening equipment acts as a constant drain on an operation’s resources, silently inflating utility costs. When a screen deck becomes blinded or pegged, the effective load on the screen increases. The vibrating motors must work harder to move the accumulated mass of material, leading to a significant increase in energy consumption.

Similarly, in wet processing applications, such as sand washing and classifying, conventional equipment is often inefficient in its use of water. Traditional screw washers require massive volumes of water to wash and transport material. Meanwhile, the Ortner® sand classifier uses only one-third of the water and one-third of the power required by other sand dewatering and classifying machines.

Plus, the large volume of wastewater that’s produced by screw washers must be managed (often in settling ponds) and may require costly treatment before it can be discharged or recycled, representing a major and growing operational expense.

Minimized Maintenance and Maximized Safety

Underperforming screens demand constant human intervention, which carries both direct labor costs and severe safety risks. The most frequent and labor-intensive task associated with conventional screens is the replacement of worn-out screen media.

More important than the financial cost is the human one. In the mining and aggregate industries, each time a crew is sent to repair or replace a component, they are exposed to significant risks, including falls, entanglement in machinery, and unexpected equipment movement.

Buying the right screening equipment isn’t just about meeting today’s production targets — it’s about setting your operation up for long-term success. High-performance screens help you minimize costs, maximize output, and extend the life of your entire processing system.

At AEI, we design screening solutions that deliver long-lasting performance and measurable ROI. Contact us today to learn how our innovative screening technology can reduce costs and boost your bottom line.

The post How Better Screens Save Money Over Time appeared first on AEI Screens.

In this article, we’ll explore the fundamentals of the screening process. We’ll explain how it works, dive into the various types of screening equipment, and outline the benefits in various industries.

What are Aggregates?

Aggregates are hard, granular materials — such as sand, gravel, crushed stone, slag, or recycled concrete — used extensively in the construction industry. They are combined with binders (like cement or bitumen) to create composite materials, such as concrete and asphalt, providing structural strength, stability, and volume to roads, foundations, and buildings.

Often sourced from natural pits and quarries, aggregates are globally the most-used mined materials, playing a foundational role in infrastructure development.

How Does Screening Work?

• Feeding and agitation: Materials are loaded onto one or more screen decks, and the screen vibrates to agitate the feed, moving particles forward while promoting size-based separation.
• Stratification: Vibration causes larger particles to rise toward the top while finer particles sink toward the surface, bringing them closer to screen openings.
• Crowded screening: As material moves across the screen, fine particles begin passing through the mesh openings together.
• Separated screening: In this final sorting stage, near-sized particles get their last opportunity to pass through the mesh openings. Remaining fines exit the screen as the screen moves the remaining coarse particles off the deck.
• Material conveyance and discharge: Gravity and screen motion work together to transport materials across the deck. Larger particles travel to discharge points while finer materials fall through mesh openings. Multiple decks in a unit help produce several size-grade outputs.

The Main Types of Aggregate Screens

Grizzly (Scalping) Screens

These rugged, static bar-style screens are typically used as the first stage in mining and quarry operations. Grizzly screens remove oversized rocks before crushing, protecting downstream equipment and boosting throughput. They’re built to handle large, abrasive material with minimal maintenance. 

Vibrating Screens

These highly versatile screens use either inclined or horizontal motion to stratify and separate bulk materials:

Inclined screens are mounted at 5 to 45°, leveraging gravity and vibration for high-capacity sorting — making them ideal for coarse aggregates in quarries.

Horizontal screens sit flat or slightly sloped and rely on powerful elliptical or linear motion. They retain material longer, offer precise size separation, and are ideal for fine aggregates or space-restricted sites. These screens often come in stacked multi-deck configurations, allowing multiple size grades to be separated in a single pass. 

High-Frequency Vibrating Screens

Operating at 1,500 to 9,000 RPM with low stroke, these screens excel at fine-particle grading, such as manufactured sand or mineral fines. They create strong G-force stratification for highly efficient separation — but are prone to quicker wear and plugging in damp or sticky feeds.

Trommel (Rotary) Screens

These feature a rotating cylindrical drum with perforations. As the drum turns, smaller particles fall through, and larger material exits at the end. Trommel screens are excellent for screening topsoil or sticky/wet materials due to their gentle handling, though they use a smaller portion of the screen area and may require brushing to prevent clogs.

Industry Benefits

Mining and Aggregate Production

In mining and quarry operations, vibrating screens are essential for efficiently sorting core materials (like gravel, sand, and crushed stone) by size. This separation improves material quality, protects downstream equipment from damage, and boosts yield and processing consistency.

Construction and Road Building

Accurately screened aggregates are vital for achieving proper compaction and long-lasting roadway and surface integrity. Removing oversized or undersized particles helps prevent uneven settling, reduces maintenance needs, and enhances overall structural stability.

Recycling and Waste Management

Screens help process construction and demolition debris, soil, and municipal solid waste. Trommel and vibratory screens sort reusable materials — like clean aggregate — from waste, enabling recycling, reducing landfill use, and promoting circular economy practices.

Mineral Processing and Fine Particle Separation

High-frequency vibrating screens specialize in separating fine particles, making them ideal for fine mineral ores, manufactured sand, and asphalt recycling. Their precision improves material purity and extraction efficiency.

Sustainability and Operational Efficiency

Improved screening reduces waste and enables better reuse and recycling of materials — such as reclaimed concrete or demolition debris. Automation and advanced screening technologies further enhance sustainability, quality control, and cost savings in material processing.

How to Choose the Right Aggregate Screen

Selecting the best screen for your operation involves evaluating several critical factors to ensure maximum efficiency and durability:

• Material characteristics: Consider particle size distribution, moisture content, abrasiveness, shape, and density. For example, high-moisture, sticky materials require screen types that resist blinding. 
• Screen type and motion: Inclined screens (5 to 45°) leverage gravity for energy-efficient processing. Horizontal screens (0 to 10°) provide longer retention time and precise separation — especially useful for fine or wet materials. 
• Separator purpose and capacity: Your desired throughput (in TPH), required cut size, and intended application — whether for scalping, dewatering, or grading — should all guide screen selection.
• Screen media: Woven wire cloth offers high open-area and low cost but lower wear life. Rubber or polyurethane panels are more durable and ideal for abrasive or moist feeds but may reduce throughput slightly. 
• Operational conditions: Account for feed rate, bed depth (optimal depth should not exceed approximately 4× the screen openings), vibration amplitude and frequency, deck inclination, and maintenance access points.

Once the above baseline has been considered, you may find that challenging materials — especially those prone to blinding or clogging — require a more-advanced screening approach. This is where BIVITEC® technology shines:

• Dual-vibration design: BIVITEC® employs dynamic tensioning and relaxing of flexible polyurethane mats using dual vibratory action, enabling incredibly high acceleration forces (material up to ~50g’s). This ensures consistent screen-clearing action against fine or sticky materials.
• Blinding elimination and high-throughput: Designed specifically for problematic or high-moisture feeds, the BIVITEC® delivers fine separation without clogging or accuracy loss — offering wider effective screening areas with rugged, low-maintenance performance.

If you have any questions about our aggregate screens, please feel free to reach out to us anytime.

The post What Is Aggregate Screening? appeared first on AEI Screens.

Understanding the fundamentals of industrial screening is essential for optimizing performance, reducing downtime, and achieving long-term success in any material-handling operation.

What is Industrial Screening?

Industrial screening is the process of separating materials into different size fractions or categories based on specific physical characteristics, such as size, shape, or other properties. Its main purpose is to ensure that only materials meeting certain specifications proceed through production or are prepared for sale, while oversized or undersized materials are filtered out for further processing or disposal.

The basic principle behind screening involves passing bulk materials over or through a screening surface — such as mesh, perforated plates, or vibrating screens — so that particles smaller than the openings fall through, while larger particles are retained. In some cases, screening also helps classify materials based on shape or density, depending on the equipment used.

Industrial screening is widely used across various sectors and handles a broad range of materials. Common examples include:

• Compost and soil in waste management
• Minerals and ores in mining
• Refuse-derived fuel (RDF) in energy production
• Wood and gravel in construction

Different Types of Industrial Screening Equipment

Vibrating Screens

These screens use a vibrating motor or mechanism to move material across a screening surface, encouraging smaller particles to fall through openings while larger ones move along the surface. They can be configured in single or multiple layers to handle different sizes in one pass. Typical use cases include:

• Aggregates and mining (sorting gravel, crushed stone, ores)
• Recycling (separating plastics, metals)
• Food processing (sorting grains, powders)

Trommel Screens

Trommels consist of a rotating cylindrical drum with perforated sides. As material enters the drum, it tumbles and rolls, allowing smaller particles to fall through the holes while larger pieces exit the other end. Typical use cases include:

• Compost and soil screening
• Municipal solid waste processing
• Refuse-derived fuel (RDF) preparation
• Sand and gravel separation

Disc Screens

Disc screens use a series of rotating discs mounted on parallel shafts. The spaces between the discs allow undersized material to fall through while larger or elongated pieces are carried forward. The rotating motion also helps break up clumps of material. Typical use cases include:

• Waste wood and biomass screening
• Recycling (especially bulky materials)
• Pulp and paper industry (removing contaminants)

Flip-Flow/High-Frequency Screens

High-frequency or flip-flow screens have flexible screening mats that are tensioned and loosened in a rapid, wave-like motion. This aggressive movement helps prevent material from clogging the screen and enhances the separation of fine or difficult-to-screen materials. Typical use cases include:

• Wet or sticky materials (e.g., clay, compost)
• Fine particle separation (e.g., sand, silica)
• Mining (separating fine ores)

Key Components of Screening Equipment

Screen Media

This is the surface where material separation actually occurs. The choice of media determines the screen’s effectiveness, durability, and suitability for different materials.

• Wire mesh: This is a common choice for dry, granular materials, like sand or gravel. The mesh offers good precision and is available in a wide range of aperture sizes, but it can wear out faster with abrasive materials.
• Polyurethane panels: Known for high durability and flexibility, these are ideal for wet, sticky, or abrasive materials and are widely used in industries, like recycling and mining. Polyurethane resists clogging and extends wear life.
• Perforated plate: Made from steel or other metals, this is a rigid option suited to coarse materials and heavy-duty applications. It withstands impact well and is often used when strength and longevity are key.

Drive Systems

Powers the movement of the screen to enable material separation. The type of drive affects the screening efficiency and material flow.

• Vibratory motors: These create linear or circular vibrations and are widely used for many screening applications. They’re simple and effective for dry materials.
• Exciter mechanisms: They offer more powerful and customizable motion and are often found in large, heavy-duty screens.
• Rotary/drum drives: They’re used in trommel or rotary screens where the screening is done by rotating the drum. These drives are suitable for bulky or mixed-material streams.
• Flip-flow drives: Specialized systems, like the BIVITEC®, use flexible mats and high-frequency vibration to tackle wet, difficult-to-screen materials.

Feed and Discharge Arrangements

Ensures smooth entry of material onto the screen and efficient exit of separated fractions.

• Feed hoppers/chutes: Even, controlled feeding is critical for maximizing screen performance. A well-designed feed arrangement prevents overloading and promotes even distribution across the screen.
• Discharge chutes/outlets: Separate oversize and undersize material streams efficiently. The discharge system should prevent blockages and spillage and direct materials to their next processing step.
• Bypass or oversize routes: Some systems include bypass options to allow certain materials to skip the screen or be reprocessed if needed.

Benefits of Effective Industrial Screening

• Enhanced product quality: Screening ensures that only in-spec material moves forward in production. This reduces contamination and improves the consistency and quality of the final product.
• Improved process efficiency: Efficient screening removes unwanted fines or oversize material early in the process, reducing unnecessary wear on downstream equipment (like crushers or conveyors). This streamlines operations and helps maintain optimal material flow, saving both time and energy.
• Maximized resource recovery: Precise screening boosts recovery rates by ensuring valuable materials are properly separated from waste streams. This enhances profitability and supports sustainability goals.
• Lower maintenance and downtime: Well-designed screening systems with appropriate screen media reduce blinding, clogging, and excessive wear, which means less frequent maintenance and fewer unexpected stoppages.
• Flexibility and scalability: Modern systems can be adjusted or upgraded with different screen media or modular components, making it easier to handle changes in material streams or production demands. This flexibility helps future-proof your investment.
• Compliance with industry standards: For industries with strict regulatory requirements, effective screening helps ensure compliance by delivering consistently clean and well-classified material outputs.

Common Challenges

• Screen blinding and clogging: Fine, sticky, or moist materials can block screen apertures, reducing efficiency and causing throughput delays.
• Wear and tear on screen media: Abrasive materials (like minerals, sand, or glass) can quickly wear down wire mesh or other screen surfaces, leading to frequent replacements and potential downtime.
• Material flow issues: Uneven feeding, surges in material volume, or inconsistent particle sizes can lead to inefficient separation and overloading of screens, which stresses both the screen media and the mechanical components.
• Handling mixed material streams: Recycling and RDF facilities often deal with mixed or unpredictable materials. This variability can compromise screening accuracy and make it hard to maintain performance without frequent adjustments.
• High energy consumption: Some screening systems — especially high-capacity or high-frequency designs — can be energy-intensive, increasing operational costs if not optimized.
• Maintenance and access difficulties: In tight or older facilities, accessing screens for maintenance or changeouts can be physically difficult, increasing labor time and the likelihood of prolonged downtime.

AEI’s Industrial Screening Solutions

The BIVITEC is particularly beneficial in industries where wet, sticky, or tricky materials pose a challenge — like recycling, composting, waste-to-energy (RDF), and mining — offering a more reliable, low-maintenance, and long-lasting screening solution. Its standout feature is its dual-vibratory, flip-flow action, which uses flexible polyurethane mats that move dynamically. This keeps sticky, damp, or fine materials constantly agitated, virtually eliminating blinding and clogging.

The Freedom Disc Screen is best suited for high-volume, mixed-material applications, like construction and demolition (C&D) waste, mulch and biomass screening, and single-stream recycling — where its anti-wrapping technology, durability, and precision help overcome common screening headaches. With heavy-duty, abrasion-resistant materials used for the discs and shafts, the Freedom Disc Screen is built for longevity.

If you have any questions about our equipment, please don’t hesitate to reach out to us.

The post Industrial Screening 101: Understanding the Basics and Benefits appeared first on AEI Screens.

To ensure high-quality materials and efficient production, precise sand classification is essential. Traditional methods often struggle with fine particle recovery, water waste, and inconsistent separation, making advanced solutions like the Ortner® system a game-changer.

How is Sand Classified?

Sand can be classified by composition (silica versus calcium carbonate or heavy-mineral sand), purity, and intended use, but it’s typically classified according to grain size:

• Fine sand: particles between 0.075 mm to 0.425 mm in diameter (used in plastering, fine concrete, and glassmaking)
• Medium sand: particles between 0.425 mm to 2 mm in diameter (commonly used in construction, mortar mixes, and casting)
• Coarse sand: particles between 2 mm to 4.75 mm in diameter (typically used in concrete production and for filling purposes)
• Very coarse sand: particles larger than 4.75 mm (often found in gravel mixtures)

The Ortner is a diverse machine that can handle a wide range of material sizes. Learn how a sand classifier works.

The Role of Sand in Construction and Manufacturing

Construction

Sand is a primary component of concrete, mortar, and asphalt, providing strength and durability. Proper classification of sand ensures consistent texture and bonding, preventing cracks and structural weaknesses.

In road construction, poorly graded sand can create voids, while properly graded sand helps create smooth, stable surfaces in asphalt mixtures.

Glassmaking

Unclassified sand often contains clay, silt, and organic matter, which can compromise its quality. And the glass industry requires high-purity silica sand with a specific grain size to produce clear, strong glass. Impurities (such as iron oxides) can affect the transparency and color of the final product.

Foundries

Foundry sand is used to create molds for metal casting, shaping everything from automotive parts to industrial machinery. The sand must have consistent grain size and high thermal resistance to withstand molten metal without breaking down.

Additionally, properly classified sand improves production efficiency, reducing material waste and improving processing speed. Consistent sand size also reduces wear and tear on equipment, extending its lifespan.

Industrial Applications

Water and air filtration systems rely on precisely classified sand to remove impurities efficiently. In ceramics manufacturing, silica sand plays a role in forming and strengthening ceramic products.

Challenges in Traditional Sand Classification Methods

Wet Washing

Traditional wet washing methods consume large amounts of water, which can lead to regulatory challenges and restrictions in water-scarce regions. Plus, the process requires energy-intensive pumps and drying systems, increasing operational costs.

Screening

Standard screens have difficulty capturing fine particles, allowing valuable material to be lost in wastewater. These screens also struggle with wet or sticky sand. Excess moisture leads to blinding, where fine particles block screen openings, further hindering separation and increasing maintenance downtime.

Many screening systems rely on fixed mesh sizes, which may not effectively separate a range of particle sizes. This can lead to oversized or undersized particles in the final product, reducing its usability in specific applications.

Settling Ponds

Settling ponds are commonly used to manage wastewater and capture fine particles, but they require significant space and regular maintenance. As sediment accumulates over time, costly dredging or expansion becomes necessary to keep them functional.

The slow sedimentation process can delay operations, reducing overall productivity.

How the Ortner® System Provides Precise Sand Classification

The Ortner® sand classifier relies on moisture-based separation rather than traditional wet washing. This allows for precise classification of sand into different sizes without the excessive water usage or energy consumption found in wet processes.

One of the key features of the Ortner® is its high-frequency vibration, which ensures accurate particle separation. The vibration helps to dislodge fine particles, allowing them to be effectively sorted from the coarser grains. This results in a more efficient fines recovery compared to traditional screening methods, which often lose valuable fine sand to wastewater.

With fewer moving parts than traditional screens, the Ortner® also requires less maintenance, leading to lower downtime and cost savings.
Contact AEI today to learn how the Ortner can meet your specific needs.

The post Why Proper Sand Classification Matters in Construction and Manufacturing appeared first on AEI Screens.

What is Mine Dewatering?

Dewatering a mine, in simple terms, is the removal of excess water from a mining site. It is common practice, as mines often extend below the groundwater table, where water naturally infiltrates the area. Other common sources of excess water buildup in a mine include standing groundwater, streams, rivers, lakes, or ponds flowing into the mine as well as rainfall or snowmelt accumulation.

Implementing a dewatering system with the proper equipment to extract and redirect water build-up will ensure a smooth operation, regardless of the type of mineral extraction taking place.

The Importance of Water Management in Mining

Productivity

The efficiency of a mine can quickly be thwarted by excess water or flooded areas in a mine. Having a well-designed water management system ensures timelines and expectations are met.

Safety

While modern-day mines largely do not use manual miners (opting for automated machinery and technology instead) uncontrolled water in mines can create hazardous conditions. These include increased risk of weakened wall structures, landslides, and floods. It’s important to note that miners may still occasionally enter mines, and proper dewatering helps mitigate the risk of physical harm.

Environmental Considerations

It’s common for mining activities to significantly impact surrounding water resources as minerals, soil, and other sediments are extracted and shifted around. For this reason, regulations, such as the Clean Water Act, require mining companies to treat and properly dispose of water to prevent contamination of nearby drinking water systems and protect ecosystems.

Learn more about green mining.

Achieving a Smooth Dewatering Process

This begins with conducting a site assessment and selecting the proper dewatering equipment and method. Equipment (such as sump pumps, wellpoint systems, educator systems, and deep well dewatering methods) are used to extract water, while sand washing equipment helps remove fines from the material.

How the Ortner Improves the Mine Dewatering Process

Leaning on specialized equipment in a dewatering operation will help with cost, time, and operational savings. And the Ortner® tackles several of the key issues faced by mining dewatering operations:

• Water usage: the Ortner uses 1/3 the amount of water a traditional dewatering machine would, significantly reducing water consumption
• Power efficiency: the Ortner® uses about 1/3 of the power used by conventional dewatering machines
• Material handling: its high-frequency vibration ensures that materials are separated quickly, producing a drier product and making conveying and stockpiling easier and less prone to clogging
• Durability: the compact and lightweight design of the Ortner® minimizes wear and tear

To inquire about the Ortner® for your mine dewatering system, contact the experts at AEI today.

The post Why Mine Dewatering is Essential for Efficient Mining Operations appeared first on AEI Screens.

In this blog post, we’ll break down the key differences between these screens, explore their benefits and limitations, and help you determine which option aligns with your operational goals.

Inclined Screens

As the name suggests, inclined screens are angled screens that take advantage of gravity to help shuffle materials down the screen for proper separation. Often angled between 15 and 30 degrees, the screen is well structured to quickly process hefty materials from construction and mining operations. As a versatile screen, you can find it in both non-vibratory and vibratory setups.

Pros

• Production capacity: Typically operating at a higher production capacity, their gravity-assisted flow can move more materials faster than horizontal screens
• Cost: Inclined screens usually have a slightly lower cost to entry than horizontal screens due to their simpler design and few moving components
• Versatility: Capable of handling larger materials, these screens can sort a wider range of particle types
• Energy efficiency: Due to the assistance of gravity, these screens require less power to operate
• Maintenance: With a less complex design, and fewer moving parts, inclined screens require less maintenance and experience fewer mechanical strains

Cons

• Sorting accuracy: Due to their quick material sorting, inclined screens are less thorough in separating fine and smaller-sized materials
• Operational space: With their angular setup, these screens require higher ceilings or an outdoor processing space
• Wet materials: Inclined screens often face more challenges sorting wet or moist materials and can get stuck or need more regular cleanings

Horizontal Screens

These screens rely solely on mechanical vibrations to sift through and transport residual construction and mining materials. Designed with more-complex moving parts, the horizontal screen is very precise when sorting fine materials that require higher precision and sorting accuracy.

Pros

• Sorting accuracy: Horizontal screens are better suited to sorting fine and small-sized materials and often provide more accurate sorting than inclined screens
• Compact design: Taking up less vertical space, horizontal screens are optimal for operations with limited space or lower ceilings
• Difficult material handing: Horizontal screens are one of the most effective screens for handling wet, sticky, or abrasive materials
• Controlled material flow: The flat orientation of the screen allows for a more-controlled flow of materials through the screen, depending on their size, weight, texture, etc.

Cons

• Processing speed: Without the support of gravity moving materials through the screen, horizontal screens can’t process as high a quantity of materials per hour as the inclined vibrating screen
• Potential for material build-up: Flat surfaces are more prone to material build-up, requiring more frequent cleaning or maintenance
• Energy efficiency: Horizontal screens require more energy to move materials across the flat surface, consuming higher volumes of energy

BIVITEC®: Combining the Best of Inclined and Horizontal Screen Technology

The BIVITEC® vibrating screen merges the efficiency of an inclined screen with the precise sorting capabilities typically found in horizontal screens.

Using high-acceleration forces across flexible polyurethane vibratory screens, the BIVITEC® achieves dependable, clog-free sorting. This advanced design is powerful enough for high-capacity production yet reduces maintenance demands. Ideal for aggregates, mining materials, and other particles like sand, coal, compost, and shredded tires – the BIVITEC® is built to handle the toughest screening challenges with accuracy and reliability.

To learn how the right equipment can elevate your screening process, contact AEI today.

The post Inclined Screens vs. Horizontal Screens: Which is Right for Your Operation? appeared first on AEI Screens.

Whether you’re optimizing current operations or exploring new solutions, dewatering screens offer essential benefits for modern mineral processing.

What is Mineral Processing?

Mineral processing involves isolating minerals from ores through physical and chemical methods. The process involves crushing, grinding, sizing, classifying,

concentrating, and dewatering. The goal is to produce products suitable for commercial, industrial, and other uses.

Solid-liquid separation, which extracts mineral-rich ores and fines (small particles of valuable minerals) from water, is a key component of mineral processing. It’s considered a critical step as it:

• Separates valuable minerals from the gangue (material without any commercial value) and other ore impurities, thereby improving ore concentration
• Eliminates impurities to produce final products of superior quality and composition

The isolated minerals are then processed in the next stage known as dewatering. This step focuses on removing the moisture content of the minerals to achieve the desired concentration levels before the products hit the market. The dewatering process uses mineral processing equipment, such as dewatering screens.

Dewatering Screens and Their Applications

A dewatering screen comprises a sturdy frame and a screen with openings for the liquid to pass through. Featuring a vibrating mechanism, it efficiently segregates solids from liquids. To optimize effectiveness, the speed of rotation, the angle of inclination, and other components of the machine are adjusted based on the properties of the feed material.

From mineral and ore processing to construction and waste management, dewatering screens demonstrate versatility in handling different materials, particle sizes, and moisture levels. They are available in customizable options to cater to specific operational needs. 

The Benefits of Using Dewatering Screens

Dewatering screens are integral in industries requiring solid-liquid separation. They provide several benefits, including:

• Enhanced product quality: Moisture significantly impacts the usability of minerals. By minimizing moisture content through dewatering screens, industries can improve the overall quality of end-products and simplify their handling and transport procedures. 
• Increased efficiency and throughput: Compared to traditional methods, these machines can handle high volumes of material, thus boosting overall efficiency, throughput, and productivity.
• Cost savings: Dewatering screens generally have lower energy consumption compared to other equipment, like filter presses and centrifuges, contributing to reduced production costs. 
• Minimal environmental footprint: These machines minimize the ecological impact of industrial operations by promoting water recycling, decreasing the volume of wastewater needing treatment, and ensuring compliance with environmental standards. 

Learn more about sustainable mining practices.

The Ortner: A Multi-Functional Solution for Mineral Dewatering and Classification

The Ortner is an efficient solution for dewatering various minerals and ores. Lightweight and compact, it can easily be transported and installed. In addition, it provides greater capacity, efficiency, and flexibility as it allows for various adjustments to meet different sand specifications properties.

The Ortner is not only designed for dewatering but also for removing fines, classifying, and rinsing sand and other fine materials, making it an all-in-one and cost-effective machine. Compared with other dewatering and classifying equipment, it boasts less power and water consumption and requires minimal maintenance, offering substantial cost savings.

To learn more about the operational benefits of the Ortner, contact us today. 

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