Non-metallic mineral and metal mining, fuel ore known as the three pillars of the liquid filling machine industry. The development of non-metallic minerals industry is an important symbol to measure the level of development of national scientific and technological progress and industrial one, many industrial countries, non-metallic mineral values ??than metal ore. Due to the non-metallic mineral products unique physical and chemical properties, application areas of non-metallic mineral products almost penetrate into various industrial sectors, and plays an increasingly important role in the national economy as a whole. The use of non-metallic mineral depends on the extent of its deep processing, including ultra-fine grinding, superfine grade, fine purification and surface modification, including effective ultra-fine grinding is the prerequisite and guarantee of the deep processing. Therefore, the development of ultra-fine grinding technology to a certain extent determines the rational development and utilization effects of non-metallic mineral products. After decades in particular, nearly a decade of research and development, non-metallic minerals industry has made tremendous development and deep processing technology continues to improve, narrowing the gap with industrialized countries, and can basically meet the raw materials needed for their own industry and related fields quality requirements. Ultra-fine grinding and classification techniques have been able to demand the processing of various types of non-metallic mineral powder raw materials 10 ~ 1μm. Various types of ultra-fine grinding can produce most of the fine grading equipment, equipment performance, and supporting technology gradually approaching or has reached the international advanced level, some new unique equipment in the structural performance. Mineral raw materials preparation technology for the automotive, paper, rubber, plastics, machinery, ceramics, microelectronics, specialty coatings, aerospace, composite materials and other industries to provide a functional non-metallic materials.
Of an ultra-fine grinding non-metallic mineral
Development and utilization of non-metallic mineral products in China began in the 1950s, has been found so far that the economic value of non-metallic mineral 100, origin of 5000 more than . As an important industrial resources, non-metallic minerals accounted for 70% of the total mineral mining . Most of the crushed graded non-metallic minerals used in agriculture, chemical, paper, plastic, rubber and coatings and other products. A wide range of non-metallic minerals, according to its use of crushed product size distribution, purity, have raised a variety of different requirements. Therefore, the development of ultra-fine grinding technology must adapt to their specific requirements. In general, non-metallic mineral requirements of the following points.
(1) the degree of fineness. The application of non-metallic mineral products require a certain degree of fineness. Such as kaolin, ground calcium carbonate as a papermaking raw material product fineness-2μm accounted for 90%, white 90%; grade paint filler fineness of heavy calcium carbonate powder of 1250 mesh; zirconium silicate ceramic opacifier need to average fineness of 05 ~ 1μm; wollastonite as a filler, it also requires the fineness of <10μm.
(2) purity. The purity requirements of the non-metallic mineral products is also one of the key indicators. This means that in the crushing process, not pollution, should maintain the original ingredients. If it is white mineral also requires a certain degree of whiteness, such as paper with calcined kaolin, talc mill whiteness ≥ 90%, the whiteness of the paper coatings, fillers and high-grade paint fill with heavy calcium carbonate > 90%.
(3) the special requirements of the powder shape  . Some non-metallic mineral products on the Shape of a strict shape requirements to accommodate different needs. Such as composite materials reinforced with wollastonite, the ultrafine powder requirements to keep its original needle-shaped crystalline state, wollastonite product as a natural short fiber reinforced materials, the aspect ratio of 8 to 10; wet method mica powder and more due to its multi-layer structure used as dielectric block forming machine
, high-grade pearl paint, pearl paint raw materials, and pearlescent pigments require the mica flake, crushed the process should be to ensure that the resulting particle radius to thickness ratio the surface can not have too many scratches, otherwise it will affect the optical effect, and its diameter to thickness ratio> 40 to 60; paper coating grade kaolin flaky mineral characteristics of ultra-fine grinding at the same time to maintain and improve powder The material coated cover capacity.
Two non-metallic mineral ultrafine grinding the development status of the equipment
The ultra-fine grinding equipment is key to its technology as a whole. Before the 1980s, China's ultra-fine grinding equipment manufacturers rarely required products mainly rely on imports of equipment for processing or direct import. After the 1980s, through the introduction, digestion, absorption, and technology research organization, began research and development of various types of ultra-fine grinding and fine grading equipment. So far, the ultra-fine grinding equipment manufacturer has reached as many as dozens of their equipment performance has reached the international advanced level. In recent years, every year has dozens of patents come out.