Non-metallic mineral powder industry status
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The general concept of non-metallic mineral powder products, it should be said that long ago, such as limestone and slaked lime fired limestone fired glass products of siliceous materials for civil engineering sand and so on. However, non-metallic mineral fine powders and functional non-metallic mineral materials have been developed with the modern scientific and technological revolution, industrial development, social progress, the improvement of human quality of life and the general awareness of environmental awareness. China's large-scale production and industrial applications in this field began in the late 1970s or early 1980s. After nearly 20 years of development, especially since the 1990s, China's non-metallic mineral processing industry has formed a considerable scale. In terms of ordinary or bulk products, it can not only basically meet the needs of the domestic market, but also a large number of exports, occupying a more important position in the international non-metallic mineral products market.
According to the incomplete statistics of China Non-Metallic Mining Industry Association and related professional associations, in 2002, China's glass quartz powder and quartz sand, heavy calcium carbonate, kaolin, talc, graphite, fluorite, gypsum, wollastonite, mica, The total output of non-metallic mineral powders such as bentonite, diatomaceous earth, asbestos and smectite powder has reached more than 35 million tons (see Table 1). In addition, in 2002, China produced 22 billion m2 of building ceramics and 60 million pieces of sanitary ceramics. Based on this, it is estimated that the annual consumption of non-metallic mineral powders such as china clay, feldspar and quartz is more than 10 million tons. According to the statistics of China Lime Association, in 2002 China's lime production reached 13.2 million tons, mainly used in steel mills, sintering plants, chemical industry, such as production of light calcium carbonate, calcium carbide, soda ash, building materials, construction, high-grade roads and wastewater. Treatment and flue gas desulfurization, etc. Based on the above incomplete statistical analysis, the total output of non-metallic mineral powders in China reached more than 180 million tons in 2002, and the processing capacity has been estimated to have reached more than 200 million tons. The processing capacity and output of ultra-fine powders have exceeded 1.2 million tons.
It should be noted that China's non-metallic mineral powder industry, although large in scale, plays an indispensable role in the country's economic construction. However, its scientific and technological content and product grade are still not high, and there are still some non-metals in China. Mineral powders, especially non-metallic mineral deep-processing products related to the development of modern high-tech and new materials, rely on imports, such as graphite, bentonite, mica, kyanite, kaolin, etc., imports of these mineral deep-processed products in 2002 They increased by 67.55%, 33.45%, 44.92%, 114.8% and 14.92% respectively compared with the previous year. In 2002, the import volume of high-quality kaolin in China reached 10,000, with an average price of 218.91 US dollars per t. In particular, China is currently the world's graphite production.
And the country with the largest export volume, such a high import growth rate indicates that China's graphite deep processing or products can not meet the needs of the domestic market. In addition, high-grade quartz glass raw materials and spherical silicon micropowders for large-scale integrated circuit packaging are basically dependent on imports.
In addition, due to the large number of non-metallic minerals, the layout of the powder processing industry is scattered, and the number of enterprises is large, but the degree of intensification is low.
