subject: Ball Mill Is Used To Process Phosphate Resources [print this page] Ball mill is used to process phosphate resources
With its advantages of high adaptability to raw materials, continuous production, large crushing ratio and easy-to-adjust products fineness, cement ball mill has been widely used in grinding raw materials and finished products in cement factory and milling other materials in metallurgy, chemical, power and other industrial enterprises. It can be used in open circuit grinding, also used in close-circuit grinding with separator; can work both in dry process method and wet process method, and can simultaneously grind during drying operations. China's phosphate rock distribution is highly concentrated, the reserves of the top five provinces are Yunnan, Guizhou, Hubei, Hunan and Sichuan, respectively accounted for 24% of the reserves, 16%, 13%, 12% and 9%, and together accounting for 74%. Rich phosphorus ores (P2O5 grade is higher than 30%) are mainly distributed in Yunnan, Guizhou, and Hubei province. On the surface China has plenty of phosphate, but in fact we are a poor phosphate country. The data showed that China's phosphate rock reserves and basic reserves were 4.1 billion tons and 100 million tons, accounting for 27.14% and 21.28% of the global. However, we had less high grade ore and much low grade ore, the average grade was only 17%. The high-grade ore with Phosphorus pentoxide is greater than 30% only accounted for only 8.5%; the can not directly use ores were more than 90%. Phosphates as non-renewable resources are gradually depleted. The United States began to limit the export of phosphate rock and imported in large quantities as early as the 1980s. China has gradually realized the importance of the phosphate rock resources.Zhengzhou vertical mill has large drying capacity and resource conservation; reduce the repeated grinding, and improve quality; adjustable hot air temperature; non-destructive shock and vibration; gather crushing, drying, grinding in one and long life span. Compared to ball mill, it is low energy consumption. Besides, it is suitable for open configuration, saving investment. Doubtlessly, vertical mill is a necessary in pulverized fuel ash industry.And this article is mainly about the cylinder and main bearing of ball mill.
Cylinder: The cylinder of ball mill is welded by several steel plates of 12-15mm thickness. Both ends of the cylinder are welded by flange plates so that the feed end cap and the discharge end cap of the cast steel can be connected to. There is replaceable lining plate in the cylinder. To keep the close contact of lining plate and cylinder inner wall and buffer the steel balls impact to the cylinder, there is plywood between the lining plate and the cylinder inner wall. For convenience, there is manhole on the cylinder, mostly is rectangle with length of 350~550mm, to replace lining plate and check the cylinder interior condition.
