Ore Dressing Line. Magnetite dressing technology is mainly used for Ore separating line with low taste. Because the rocks have a strong magnetism and easy to grinding, most of the magnetic ore-dressing plants adopt one stage and many stages process for its crushing Origin. Shanghai, China. HS Code. 8474209000. Product Description. Ball Mill. General Introduction of Ball Mill Ball Mill grinds material by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder and onto the material to be ground. The rotation is usually between 4 to 20 revolutions per minute ... Bauxite processing is relatively simple and hand dressing is used commonly. The design is that washing for three times, crushing for two times and hand dressing for one time. Along with the development of refractory material and alumina industry in our country, the production of bauxite raw materials is put forward higher and higher demand.