There are many types of grinding machines used in industry, and there are many classifications, which are as follows: 1. According to the characteristics of grinding media can be divided into: Ball mill, the medium is steel balls or cast iron ball. Rod mill, the medium is steel rod. Gravel mill, the medium is siliceous gravel. Self-grinding machine , the medium is the ore itself. 2. According to the shape of the cylinder can be divided into: Short cylinder type grinding machine, length to diameter ratio: L/D ≤ 1.5 . Long barrel type grinding machine, length to diameter ratio: L / D = 1.5 ~ 3 ; but when the length to diameter ratio L / D > 3 , also known as tube mill. Tube mills are used in the cement industry. Conical mill, the shape of the ends of this mill is tapered. Due to the low efficiency of grinding, production and use have been stopped. 3. According to the different methods of mining, it can be divided into: The overflow type grinding machine overflows the material and is discharged through the hollow journal. The lattice type grinding machine discharges the material by the action of the end lattice plate and the lifting bucket. The peripheral discharge type grinding machine discharges from the periphery of the discharge end cylinder. In the above grinding machine, most gold mining application is the short tubular lattice-type ball mill, ball mill and the overflow short cylinder rod mill, in recent years, since the mill is also used. Grinding methods include dry grinding and wet grinding. Dry grinding is carried out without grinding water in the mill; wet grinding adds a certain amount of water to the mill. Since the wet grinding is about 30% larger than the dry grinding capacity (except for the self-grinding machine), and because the dry grinding dust is seriously polluted and the recovery rate is low, the gold mine generally does not use dry grinding. The ball mill can crush ore of various hardnesses, and its crushing ratio is very large, usually 200 to 300 . The ball mill can be used for rough grinding or fine grinding, but it is best for fine grinding. The ball mill's feeding size is generally less than Rod mills are used in re-election plants and are generally used for rough grinding before ball mills. Feeding grain size does not exceed In addition, the rake mining machine and the mill are old-fashioned grinding equipments . Due to their simple structure, light weight and easy handling, they can also be mixed with mercury in the ore and grinding ore, so they are inconvenient in transportation and small in production. It is still used in individual cases. Potato Cassava Starch Machine,Cassava Starch Processing Machine,Potato Starch Extract Machine,Cassava Starch Making Machine Shuangfeng Nongjiabao Machinery Technology Co., Ltd , https://www.starchmachine.nl