Vertical roller mill for slag grinding

Steel slag is a solid waste generated in the process of steel making and is mainly composed of oxides of calcium, iron, silicon, magnesium, and some other elements.As a new type of admixture for high-performance concrete, steel slag powder has the advantages of improving various properties of concrete such as compression, tension, shear and bending. At present, replacing cement in concrete and cement products with slag powder has become the mainstream trend in the building materials industry.

 

Process of vertical roller mill grinding slag

Vertical roller mill grinding slag is a system that has developed rapidly in recent years. The grinding process is simple, and drying, grinding, and powder selection are all completed in the roller mill. It has low investment, low unit power consumption, and fast heat transfer, but it is more difficult to maintain than the ball mill.

Slag is transported into the factory by truck and stored in the material shed. The material is taken by a forklift, and after being measured by a hopper and a quantitative feeder, it is directly sent to the vertical roller mill by a belt conveyor. An iron remover is installed on the conveyor for iron removal.

The slag after iron removal enters the vertical roller mill for grinding. The slag powder after drying and grinding is collected by a bag dust collector and transported to the finished product warehouse by an air chute and an elevator. The material discharged from the vertical roller mill is fed back to the vertical mill through a conveyor and an elevator. The drying heat source is provided by a hot air furnace.