These grinding mills are used in thermal power and steel companies' limestone desulfurization, lime milling, crushing and screening. MTW series Mill is the world's largest industrial milling machine and the world's most advanced European-style trapezoidal milling machines is is particularly applied to limestone, lime crushing and milling of large production.It is widely used in steel mills and thermal power plant desulfurization process of milling,and the ratio of desulfurization can be higher than 92%. Its maintenance is convenient and results are obvious. It is exported to European , Asian and African countries and more regions. It is called "Chinese king of mill" by Power plants and iron and steel enterprise, and makes contribution to the world's environment protection.