... have doubled, and can be used in metallurgy oil, coal mine, mining, power, chemical industry, etc. Because of its good ... can save maintenance cost.Coal mine, mine, iron ore and chemical nonferrous metal and non-metallic mining etc, concentrator is used ... pipe wear and corrosion and scaling problems, such as: coal, mining pulp, conveying, coal-water slurry, conveying, thermal power plant, the fly ...