Limestone is one of the most widely used nonmetallic minerals. Ground limestone powder is applied in power plant flue gas desulfurization, building material filler, chemical raw material and metallurgical flux. Different downstream industries set different standards on fineness moisture content and impurities. Desulfurization usually needs 200-325 mesh powder, building filler covers 200-400 mesh, while chemical and metallurgical production adjust specifications according to process. Large powder bases demand stable output drying capacity and long continuous running time. Traditional ball mill systems consume high power and bring heavy maintenance work. LM Vertical Roller Mill from SBM is the main equipment for large scale limestone powder production.
Standard dry grinding workflow: raw stone crushing and screening → iron and impurity removal → silo storage → metered feeding → grinding and compressing → air classification → finished product storage. LM vertical roller mill integrates drying grinding classification and conveying. Hot air can be injected to dry moist raw material inside the mill, removing independent dryer and simplifying layout. Grinding roller and table are made of wear resistant material optimized for moderate abrasion of limestone, extending service cycle and cutting long term maintenance cost.
Sealed negative pressure system matches pulse dust collector to meet emission standards for mines and chemical parks. Automatic control supports local and remote operation and connects with plant DCS system. Feed rate grinding pressure and classifier speed can be adjusted in real time to stabilize particle size. It covers wide capacity range and supports 24 hour nonstop production for large limestone processing bases.
Many customers ignore moisture fluctuation of raw material. Wet limestone may cause blockage and interrupt production. Hot air temperature and air volume of LM mill can be adjusted flexibly to adapt variable moisture. Iron removal equipment can be equipped to reduce iron content for high whiteness limestone powder for building materials.
If you plan large limestone grinding line for multiple products such as desulfurization powder and building filler powder, please leave message or click business consultation. Submit raw material hardness feed size target capacity and fineness. SBM engineers provide free production line layout and energy consumption calculation.
Summary: This article introduces different specification requirements of limestone powder for various industries. It presents high output integrated drying and continuous operation advantages of LM mill for large limestone deep processing plants.
