rotating dryer

The rotary dryer is a high-efficiency industrial three-pass rotary drying equipment specially designed for dry mortar production lines. It is mainly used for dewatering and drying river sand, manufactured sand, quartz sand and other mortar aggregates. Wet sand with high moisture content will cause material agglomeration, uneven mixing, low strength and unstable quality of finished dry mortar. Adopting a three-layer nested rotary cylinder structure and counter-current hot air circulation technology, the rotary dryer realizes continuous heating, evaporation and dehumidification of granular materials. It can stably dry wet sand with 15%–20% initial moisture down to ≤0.5% final moisture, fully meeting the strict aggregate standards for industrial dry mortar production. With stable operation, large output and low energy consumption, it solves the low efficiency, poor uniformity and high failure rate of traditional single-cylinder drying equipment, serving as the core front-end drying equipment for standardized dry mortar production lines.

• Three-Pass Rotary Drying, Uniform Dewatering

  Adopts inner, middle and outer three-layer circulating drying structure. Materials form a continuous material curtain inside the cylinder and make full contact with hot air in multiple directions. The drying cycle is longer and heat exchange is more sufficient, ensuring consistent moisture of finished sand without wet core or uneven drying.

• High Thermal Efficiency & Significant Energy Saving

  Equipped with waste heat recovery and internal thermal insulation structure. The hot air circulates in the closed cylinder to reduce heat loss. Compared with traditional single-cylinder dryers, the thermal efficiency is increased to over 80%, and the comprehensive energy consumption is reduced by more than 30%, greatly lowering long-term production costs.

• Wear-Resistant & Durable Structure

  The cylinder adopts thickened wear-resistant steel plate, and internal lifting plates are made of high-strength anti-wear materials. It resists long-term impact and friction of high-hardness sand, effectively avoiding equipment deformation and abrasion. The optimized transmission system ensures stable rotation, low noise and long service life.

• Closed Dust Removal & Environmental Protection

  Matched with negative pressure closed dust removal system and bag dust collector. It effectively captures floating dust and fine sand generated during drying, realizes zero dust overflow, meets international environmental protection emission standards, and improves workshop working environment.

• Strong Operational Stability & Low Failure Rate

  Simplified and mature mechanical structure, not easy to block materials. It supports 24-hour continuous industrial operation, adapts to long-term high-load production of dry mortar factories, and reduces downtime and maintenance frequency.

• Wide Compatibility & Easy Line Matching

  It can be perfectly connected with batching system, mixing system and packaging system of dry mortar production lines. It supports multiple heat sources such as natural gas, diesel, biomass and coal, adapting to different factory energy conditions and production scales.

• Pre-Startup Inspection

  Check the tightness of cylinder connection parts, the wear condition of internal lifting plates, the normal operation of motor and reducer, and the unobstructed state of hot air duct and dust removal pipeline. Prohibit starting with faults to avoid jamming and equipment damage.

• Uniform Feeding Management

  Maintain continuous and uniform feeding speed. Overfeeding will cause internal material accumulation and blockage, while intermittent feeding will lead to unstable drying temperature and uneven sand moisture. Remove oversized impurities in advance to prevent cylinder abrasion.

• Reasonable Temperature Control

  Adjust drying temperature and rotating speed according to incoming sand moisture. Avoid long-time ultra-high temperature operation to prevent cylinder deformation and material scorching. Monitor discharge moisture in real time to ensure stable finished quality.

• Standard Safety Operation

  Operators must receive professional training. It is forbidden to touch the rotating cylinder and high-temperature pipeline during operation. Cut off the total power supply completely before maintenance, cleaning and parts replacement.

• Regular Daily Maintenance

  Clean residual materials and dust inside the cylinder and dust collector after daily shutdown. Regularly lubricate transmission bearings and reducers, and inspect wearing parts to extend equipment service life.

• Timely Fault Handling

  Once abnormal noise, temperature surge, material blockage or air leakage occurs, stop the machine immediately for inspection and troubleshooting. Strictly prohibit faulty operation to prevent secondary failure.

• Dry Mortar Production Industry

  Special front-end drying equipment for ordinary masonry mortar, plastering mortar, bonding mortar, waterproof mortar and thermal insulation mortar production lines, providing qualified low-moisture sand aggregate.

• Building Materials Aggregate Processing

  Drying treatment for river sand, manufactured sand and quartz sand used in construction mortar, concrete admixtures and building powder materials.

• Sand Washing & Processing Plant

  Deep dewatering and drying of washed wet sand to meet high-standard raw material requirements for high-grade mortar and fine building materials.

• New Material & Refractory Industry

  Drying of granular raw materials for thermal insulation materials, refractory powder and building ceramic raw materials.

• Large Construction & Municipal Projects

  Supporting drying production of special mortar aggregates for infrastructure, road engineering and industrial building projects.

• Q1: What is the maximum moisture of wet sand that the rotary dryer can handle?

  A1: It can stably process wet sand with 15%–20% initial moisture content, and the finished sand moisture can be steadily controlled below 0.5%, fully complying with dry mortar production standards.

• Q2: What are the advantages of three-pass rotary dryer over single-cylinder dryer?

  A2: The three-layer nested structure has higher thermal efficiency, 30%+ lower energy consumption, more uniform drying effect, smaller floor space and lower failure rate. It is more suitable for long-term continuous mass production of mortar factories.

• Q3: Why does the finished sand have uneven moisture?

  A3: The main causes include unstable feeding speed, blocked hot air pipeline, damaged lifting plates or unreasonable temperature setting. Regular inspection of feeding system, air duct and wearing parts can solve this problem effectively.

• Q4: Can the equipment adapt to multiple heat sources?

  A4: Yes. It supports natural gas, diesel, biomass and coal heat sources. Customers can choose the matching hot blast system according to local energy policies and cost conditions.

• Q5: Is the rotary dryer environmentally friendly?

  A5: Yes. The whole machine adopts closed negative pressure dust removal design, no dust overflow during operation, meeting international environmental protection emission standards and realizing clean production.

• Q6: Can the equipment be customized for different output requirements?

  A6: Absolutely. We support customized models from 3t/h to 30t/h, and can adjust equipment size, structure and control parameters according to customer’s production line scale and site conditions.

• Q7: How to reduce operating energy consumption effectively?

  A7: Keep uniform and stable feeding, set reasonable drying temperature according to material moisture, and regularly clean dust and blockages in the heat exchange system to ensure smooth hot air circulation, which can maximize energy-saving effect.