How to process coke grinding powder? The grinding mechanism of coke is difficult due to its high abrasiveness, unstable bearing coefficient, high water content, viscosity and other characteristics, and its grinding difficulty coefficient is 3 times that of cement clinker. It is very important to control the particle size of coke powder, so the selection of coke grinding mill is particularly critical.
At present, the production of 0.1mm-0.5mm coke grinding mill equipment, in principle, is nothing more than several: impact impact type; Rolling type; Pipe mill model; Other types of coke grinding mill.
⑴ Impact crusher is represented by hammer crusher and impact crusher. It is suitable for producing materials larger than 3mm. The materials are required to have good brittleness and low abrasiveness, such as coal, limestone, lime, etc. Due to the high linear speed of coke powder, the wearing parts are frequently replaced, and the particle size cannot be guaranteed; The equipment has large air blast volume and serious pollution.
(2) Roller compaction equipment is represented by counter roller type, rolling type, coke Raymond mill, etc. These equipment also cause uneven wear on the surface of roller and roller plate due to the high abrasion of coke: grooving or inclined wear, which makes it impossible to adjust the gap to ensure the particle size, resulting in a rapid decline in the yield and output, which will drop by 50% in more than ten days.
(3) The tube mill model is represented by the ball mill. Because the ball is brought to a certain height by the rotation of the whole machine to impact the grinding materials, its diameter and length are the key. When these two parameters are fixed, the fineness will be fixed. However, because the medium filling rate is only 30%, the energy consumption is 50% higher than that of other equipment, and the dust prevention performance is not good, so dust removal equipment must be added, which has a large investment and high operating costs.