Fly ash is the main solid waste discharged from coal-fired power plants, mainly composed of SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2 and other major oxides.
Ultrafine pulverization is an important means to improve the activity and added value of fly ash. The finer the particle size, the higher the hydration activity and the higher the application value. practice shows that:
15~10μm ultra-fine fly ash can be widely used in high-performance green concrete;
Ultrafine fly ash of about 10μm can widely replace inorganic or mineral fillers;
Ultrafine fly ash of about 5 μm can replace part of carbon black after surface modification;
Ball mill is a kind of fly ash grinding equipment commonly used in the industry, which has great flexibility and market adaptability. However, its pulverizing fineness is limited, and it can only be used for conventional fineness (about 150-250 mesh converted into microns, which is 50-100 μm) pulverizing production. Which equipment is good for processing ultra-fine fly ash?
HGM ultrafine grinding mill
The grinding roller installed on the turntable in the main machine cavity rotates around the central axis. There is a large movable gap between the grinding roller and the grinding roller pin. Under the action of centrifugal force, the grinding roller swings horizontally outwards, so that the grinding roller presses the grinding ring. , the grinding roller rotates around the grinding roller pin at the same time. The material passes through the gap between the grinding roller and the grinding ring, and achieves pulverization and grinding due to the rolling of the grinding roller. The grinding rollers are arranged in 4 layers. The material passes through the first layer of grinding rollers and the grinding ring for primary crushing, and then passes through the second, third and fourth layers for secondary, tertiary and fourth crushing. Therefore, the material is fully ground, and the particle size of the finished product is 150-2500 mesh.
CLUM Ultrafine Vertical Mill
The vertical mill has the advantages of strong material adaptability, continuous production, stable operation, efficient operation, simple process flow, small footprint, easy adjustment of product fineness, low noise, and less dust.