Barite is a mineral used as a white pigment and filler in products like paper, glass, and textiles. It can be processed into different mesh sizes for various applications. The YGM Raymond mill and HGM ultrafine mill are recommended for grinding barite into fine powders between 15-3000 meshes. The barite grinding process involves transporting barite into a hopper, feeding it into the grinding mill, grinding and screening the product, and collecting the final powder.