slag rotary dryer with hot air equipment and speed reducer

Slag Rotary Dryer Overview

Slag rotary dryer is a kind of equipment specially used for drying slag and other materials. Through the rotating cylinder, wet materials are fully contacted with high-temperature hot air, utilizing heat to evaporate the moisture in the material and achieve efficient drying. Slag rotary dryer is widely used in iron and steel smelting, calcium carbide slag, limestone, river sand, quartz sand and other types of materials drying treatment.

Working Principle of Slag Rotary Dryer

1. Charging and conveying: Slag is conveyed to the hopper via belt conveyor or bucket elevator, then enters the feeding end of the dryer. The feeding pipe is sloped greater than the natural inclination of the material, ensuring smooth entry into the dryer.
2. Material drying process: The dryer’s cylinder is slightly tilted; material enters from the high end and contacts the heat carrier (such as hot air or flue gas) for heat exchange. As the cylinder rotates, the material moves along its inclination. Moisture evaporates as wet material contacts the hot airflow, and dried material is discharged from the discharge end.
3. Heat transfer and material heating: Lifting plates on the inner wall of the cylinder lift and scatter the material, increasing its contact area with the airflow, thus improving the drying rate. After drying, the heat carrier carries dust and particles that are treated by cyclone dust collector, bag filter, or wet dust collector to reduce exhaust emissions.

Application Areas of Slag Rotary Dryer

1. Iron and steel smelting industry: drying slag produced in the process of iron and steel smelting
2. Building materials industry: for drying limestone, clay, river sand, quartz sand, etc.
3. Chemical industry: drying calcium carbide slag, water slag, and similar materials
4. Other industries: handling various high humidity, high viscosity materials to meet different enterprise drying needs

Advantages of Slag Rotary Dryer

1. High efficiency and energy saving: Uses downstream drying mode, with materials and hot air moving in the same direction for high heat exchange efficiency. Lower dryer outlet temperature effectively reduces energy consumption, with coal consumption reduced by about 20% and overall drying cost lowered.
2. Strong overload resistance: Designed to handle overload situations, allowing continuous operation under high load, large capacity, and high reliability.
3. Innovative structural design: The internal structure avoids material sticking to the cylinder wall, strengthens cleaning and heat conduction, and reduces maintenance frequency.
4. High-efficiency dust removal system: New feeding and discharging devices solve blockage and material return issues, ensure continuous and even feeding, reduce dust removal system load, and improve the working environment.
5. Adaptable: Working parameters can be adjusted to meet the requirements for drying slag of different particle sizes and humidity levels, providing high flexibility.
6. Simple maintenance: Uses pin interchangeable gears instead of traditional cast steel gears, saving investment costs and greatly reducing maintenance time and repair costs.