The national production of welding electrodes requires about 15,000 tons of mica annually, 140,000 tons of mica powder for linoleum paper and 2000 tons of mica powder for ultrafine mill. Combined with the newly opened mica powder application field, mica powder Demand may further increase. Ultrafine mill as commonly used milling tools for mica, limestone, calcite and other non-metallic mines, with many advantages and features, SBM new ultrafine mill covers vertical pendulum structure, maintenance-free roller assembly, ultra-fine grading machine, energy-efficient dust removal system, easy maintenance drive system and several other exclusive patents, with high capacity, high efficiency, energy saving, environmental protection, low noise, less investment costs, stable operation and many other advantages and features, the output increased by 40% under the condition of same total power, the unit power consumption savings of more than 30%, occupy a pivotal position in mica processing and production.