Why is sand drying important in aggregate processing?

Dry sand improves handling, storage, and product quality for construction materials such as concrete, asphalt, and industrial sand products.

What types of sand can be processed in aggregate dryers?

Industrial dryers can handle silica sand, frac sand, construction sand, and specialty industrial sands.

How do aggregate dryers handle abrasive materials?

These systems are built with durable materials and wear-resistant components to withstand highly abrasive sand and aggregate products.

What industries rely on sand drying systems?

Sand dryers are widely used in the production of construction materials, foundries, frac sand processing, and mineral processing operations.

What factors influence sand drying efficiency?

Moisture content, particle size distribution, airflow temperature, and feed rate all affect the drying performance of aggregate dryers.

Aggregate & Sand
Dryers / Coolers

Rising fuel costs have made fluid bed technology far less costly to operate than rotary dryers.

Reduce fuel consumption with advanced airflow design that maximizes heat transfer and minimizes wasted energy.

Lower operating costs through efficient fluidization that delivers consistent drying and cooling with less energy input.

Increase production efficiency with uniform material processing, reduced downtime, and optimized throughput for high-volume sand and aggregate operations.

Fluid Bed Dryers For Aggregate & Sand Applications

Carrier Vibrating Fluid Beds have been used for decades and are custom designed, engineered and manufactured to efficiently dry and cool sand and gravel with minimal erosion, buildup or product weepage through the deck. With the addition of a small amount of vibration, Carrier’s sand and aggregate fluid beds can minimize air fluidizing requirements to reduce energy consumption. Vibration characteristics can also be adjusted to optimize the drying process.

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Aggregate & Sand Fluid Bed Systems

To meet the demanding requirements of aggregate producers, Carrier has developed a line of fluid bed processors specifically designed for the industry. These aggregate and sand dryers and coolers offer proven reliability and low operating costs.

Nur Sand-/Aggregattrockner - Ein einzelnes Hochtemperatur-Wirbelbett, das in der Regel 30-40 % weniger Brennstoff verbraucht als ein Rotationstrockner.

Dryer/Cooler with Recirculation – Warm exhaust air from the cooling section is re-circulated to the drying zone air heater, providing an additional energy savings of up to 15% and reducing the amount of air exhausted to atmosphere by up to 50%.

Trockner/Kühler mit prädiktiver Mehrpunktsteuerung - Ein SPS-basiertes Steuersystem wird verwendet, um den Zustand des Produkts auf dem Weg von der Trockenzone zur Kühlzone präzise zu steuern. So kann das System den Verdunstungskühleffekt nutzen, der auftritt, wenn warmer, leicht feuchter Sand der Kühlluft ausgesetzt wird. Dieses System verhindert den Austritt von heißem oder nassem Sand unter ungünstigen Bedingungen und verbessert die Energieeffizienz um etwa 10 %.

Features & Benefits

Operates at just one “G” of vibrational force to ensure dry, uniform product at the discharge and energy-efficient fluidization.

Vibration amplitude/frequency combination provides the precise amount of vibration to efficiently process surges of wet sand, rocks, and frozen lumps, and is easily adjusted to handle changes in process specifications.

Single, stainless steel flexible bellows connector designed for high temperatures and is easily bolted to the fluid bed.

Expanded hood bolted to the plenum and deck minimizes entrainment of fine particles in the exhaust gas.

Dryer/cooler drive mechanism allows full adjustment of important parameters such as amplitude, frequency, and angle of vibration.

Entire machine is dynamically isolated to reduce the reaction to the supporting foundation.

Insulation is attached with a steel skin, and hot air is supplied to the machine through a flexible metal bellow instead of fabric flexible connectors delivering the most reliable aggregate and sand dryer/cooler available today.

Various Carrier sand and aggregate dryer/coolers system designs are available, each offering varying degrees of energy savings and capital cost.

Equipment Options & Accessories

Aggregate & Sand Systems

Carrier understands that each processing plant is unique, which is why we don’t force a single solution to fit every application. We develop the most cost-effective solution based on your specifications, considering various options for reducing both capital and operating costs.

Dryer Only – Standard Fluid bed dryers for sand and aggregate applications typically use 30-40% less energy than a rotary dryer.

Dryer / Cooler – A cooling zone is added to the drying zone to reduce the temperature of the product. Sand and other aggregates can be slightly under-dried in the drying zone, leaving enough moisture in the hot product for an evaporative cooling effect. This reduces the energy required for drying and the air required for cooling. The net result is a unit that discharges cool product using less energy than a rotary dryer.

Dryer/Cooler with Partial Recirculation – Warm exhaust air from the cooling zone can be cleaned and recirculated to the hot air heater, providing additional energy savings of up to 15%. This also substantially reduces the amount of exhaust air discharged to the atmosphere.

Dryer/Cooler Process Controls

Sand and aggregate dryers typically control
the drying process with feedback from
temperature sensors at the product discharge
or in the exhaust duct. Carrier’s control package consists of cascaded programmable
controllers connected to high-speed
temperature transmitters, which control the
output of the hot air heater by reacting to
temperature changes caused by varying infeed conditions.

Multi-Point Predictive Control System

For the highest energy efficiency available, Carrier offers an optional PLC-based control system with logic written specifically for sand and aggregate drying. This system uses highspeed temperature transmitters to detect temperature changes at up to nine points in the drying zone, cooling zone, and in the exhaust hood. The predictive control system reacts to small temperature changes in the product before it reaches the end of the machine, controling both the feed rate and hot air temperature to ensure the product is discharged without over-drying.

The control system comes with an easy-to-use touch screen panel which can be modified to include other operations in the drying plant.

Access Manways & Sampling Ports

Access the interior through a variety of manways, doors and sampling ports.

Fluidized Decks

Ensure precise airflow and consistently distributed heat with the proper fluidizing deck for your application.

Materials of Construction

Material contact surfaces can be fabricated from carbon steel, stainless steel or a number of other alloys. Specialized coatings are available to reduce product adhesion.

Integrated Systems

Standalone or complete multistep processing solutions. Carrier designs and manufacturers complete sand processing systems.

Anwendungen

Frac Sand

Carrier’s aggregate and sand dryers and coolers processes frac sand to controlled moisture and temperature specifications using efficient air-to-particle heat transfer. Uniform processing preserves particle integrity while preparing proppant for screening and storage.

Silica Sand

Provides controlled drying and cooling of silica sand through uniform airflow and material distribution. Efficient heat transfer achieves consistent moisture and discharge temperature for downstream classification and handling.

Specialty Glass Sand

Precisely conditions glass-grade sand to achieve consistent moisture and temperature. Controlled airflow and residence time support uniform feed characteristics for blending, storage, and glass manufacturing.

Construction Sands

Carrier fluid beds remove moisture while controlling discharge temperature in construction sand using high-capacity convective heat transfer. Consistent processing prepares material for blending, storage, packaging, or immediate use.

Limestone Aggregate

Dries and cools limestone aggregate across varying particle sizes and feed conditions. Controlled airflow and material retention provide consistent thermal conditioning while accommodating abrasive, high-throughput operation.

Gravel

Provides high-capacity drying and cooling of gravel through controlled air-to-material contact. Engineered material distribution promotes uniform heat transfer and consistent discharge conditions for downstream processing.

Crushed Stone

Thermally conditions crushed stone using controlled airflow and residence time to remove moisture or excess heat. Robust construction accommodates abrasive, irregular particles while maintaining continuous throughput.

Asphalt Millings / RAP

Our sand and aggregate dryers and coolers removes moisture and controls temperature in reclaimed asphalt pavement before downstream processing. Engineered airflow provides efficient thermal conditioning while accommodating variable particle sizes and feed moisture.

Dolomite

Provides uniform drying and cooling of abrasive dolomite products using controlled convective heat transfer. Consistent material distribution achieves predictable moisture and temperature specifications for downstream handling.

Rail Ballast

Handles coarse, abrasive rail ballast using heavy-duty drying and cooling configurations. Controlled airflow removes moisture or heat while rugged construction supports continuous processing of large aggregate.

Manufactured Sand (M-Sand)

Dries and cools manufactured sand while managing its angular particles and fine fraction. Uniform air distribution provides consistent moisture and temperature for classification, storage, and concrete production.

Filter Sand

Precisely dries and cools filter-grade sand to controlled moisture and temperature specifications. Uniform thermal processing supports consistent classification and dependable performance in filtration applications.

Granite Aggregate

Provides controlled drying and cooling of dense, abrasive granite aggregate. Robust construction and uniform airflow maintain consistent product conditions across demanding, high-capacity processing applications.

Recycled Aggregate

Thermally conditions recycled aggregate containing variable particle sizes and moisture levels. Controlled airflow provides consistent drying and cooling while preparing recovered material for classification, storage, or reuse.

Washed Aggregate

Removes residual surface moisture from washed aggregate through efficient convective drying. Controlled material distribution and airflow achieve consistent final moisture while preparing product for screening or storage.

Dry Aggregate Processing

Carrier Vibrating Equipment provides dryers and coolers for controlled cooling or final moisture conditioning within dry aggregate processing systems. Uniform material movement and airflow maintain consistent discharge conditions for screening, conveying, storage, or packaging.

Wet Sand Processing

Efficiently removes high surface moisture following washing or dewatering operations using efficient air-to-particle heat transfer. Controlled drying produces consistent moisture levels for screening, classification, and downstream handling.