The mining industry includes mining and metallurgy, and there is a large demand for valves in the process of beneficiation and smelting. The mining industry includes mining and metallurgy (ore dressing + smelting), and there is a large demand for valves in the ore dressing and smelting process. The medium usually has the characteristics of large particles, high hardness, high viscosity or strong acid and alkali, and has strict requirements on the valve. Features.