）Application of slag pre grinding and transformation in the building materials industry

The application of building materials industry is the main development direction of slag treatment. There are generally two methods: using slag as a mixing material and cement clinker for grinding, but due to the poor grindability of slag, the grindability coefficient is generally higher than that of cement clinker by more than 5kwh/t. It is difficult to achieve the ideal fineness and exert higher activity in mixed grinding, so most of the dosage is below 40%; The second method is to use separate grinding to grind the slag separately to a specific surface area of 420m2/kg or more (the higher the specific surface area, the better its activity).

In recent years, many enterprises have introduced advanced equipment and technology for separate grinding of slag, achieving good economic benefits. There are mainly two production processes used, which are importedVertical millLoop flow process, high single machine production capacity, low energy consumption, but importedVertical millLarge investment is difficult for ordinary enterprises to bear; The second is the ball mill open flow system (partially a loop flow system), which is adopted by most domestic enterprises. However, there are defects such as low single machine output, high energy consumption, and difficult control of product fineness. Therefore, the transformation of a large number of existing ball mill systems to reduce the power consumption of slag grinding has become a development trend. The following is an introduction to the application of the HGM series ultrafine powder grinding process for processing slag/water slag, a new product of ball mill transformation.

（2） Introduction to the Process of Processing Slag and Water Slag with HGM Series Ultra fine Grinding Machine:

HGM ultrafine powder mill is a new type of equipment for processing various stone materials. This equipment has great advantages over traditional ball mills and Raymond mills. Compared with ball mills, this machine consumes less energy, is easy to operate, and can produce powder in batches without the need for drying or calcination equipment. Compared with Raymond mills, this machine greatly improves the quality of powder, with a fineness of up to 3000 mesh, while ordinary Raymond mills can only reach around 300 mesh

The process of processing water slag/slag with ultrafine powder grinding is extremely simple: slag principle - (crusher) - ultrafine powder mill - slag/water slag powder with 325 mesh -3000 mesh