Pengfei Group has developed large-scale autogenous mills, semi autogenous mills, overflow mills, and air swept mills through years of continuous cooperation with research institutions. Widely used in industries such as metallurgy, mining, cement, and electricity. The "Pengfei" brand series ball mill fully considers the user's working conditions, continuously improves the internal conditions of the mill according to the compartment plate and discharge grate plate, equips new lining plates as needed, adjusts the mill speed, optimizes gear design and bearing lubrication parameters, increases the stability and service life of the mill, and improves the grinding efficiency. Autogenic grinding mill, also known as media free mineral grinding machine. According to working conditions, autogenous mills are divided into two types: dry autogenous mills and wet autogenous mills. The working principle of autogenous mills is different from ball mills. The diameter of the autogenous mill cylinder is larger, and it does not use grinding media such as steel balls. Instead, it uses the crushed material itself as a medium and collides with each other inside the cylinder to achieve the goal of grinding. A small amount of steel balls can also be added to the autogenous mill to improve processing capacity, usually only occupying 2-3% of the effective volume. The ore that can be processed by the autogenous mill includes non-ferrous metal minerals such as asbestos, iron ore, copper ore, limestone, gold ore, lithium ore, manganese ore, etc. The biggest feature of the autogenous mill is its large crushing ratio. The autogenous mill has both crushing and grinding functions. The autogenous mill can directly add raw or unpolished ore from the quarry to the autogenous mill, and can grind the material to 0.074mm at once, accounting for more than 20%~50% of the total product content. The crushing ratio can reach 4000~5000, which is more than ten times more efficient than ball mills and rod mills. According to the grinding process flow and whether or not to add balls, autogenous mills are divided into autogenous mills and semi autogenous mills. According to the different structural types and grinding methods of autogenous mills, autogenous mills can be divided into dry autogenous mills and wet autogenous mills.