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Kaolin processing craft and investment prospects2015-03-01
The main application of kaolin
In recent years, kaolin is developed into a new type of rubber filler. Kaolin in ceramics, rubber, plastics, leather, since the cement, refractories, chemical and other industries and agriculture are widely used. With further increase of te high soil beneficiation process lacewing, kaolin range of applications will become increasingly widespread. Coal Geology system backup unit, from the actual situation, based on the coal strata high lacewing soil resources and market demand. Kaolin is ubiquitous in nature a non-metallic minerals, in the past generally used for the production of ceramics, refractories and the incorporation of a small amount of plastic, rubber filler ashamed. With the increasing development of the national economy in various fields, there is a growing emphasis on the depth of processing high lacewing earth, because it can not only get new materials with special properties, but also improve economic efficiency. One stern methods of kaolin processing, washing and upcoming Pat tough weed kaolin mill drying step further heating, roasting, dehydration, make it into metakaolin, used as a filler plastic cable division to improve cable sheath insulation performance. Footwear rubber filler used mainly two kinds of organic fillers and inorganic fillers, the former including recycled plastic and recycled materials, the latter including silica, calcium carbonate, titanium dioxide, magnesium carbonate, magnesium oxide, carbon black and zinc oxide powder.
Mainly used material
Plastics, ceramics, rubber, refractories, leather, cement
Pure quality kaolin with high brightness, soft, easily dispersed suspended in water, good plasticity and high adhesion, excellent electrical insulation properties; has good acid-soluble, low cation exchange capacity, better fire resistance and other physical and chemical properties. So kaolin has become a kind of necessary material in papermaking, ceramics, rubber, chemicals, paints, pharmaceuticals and defense industries and dozens of mineral raw materials. Kaolin application paper industry is very extensive. There are two main areas, one in the paper (or papermaking) used in the process of packing, and the other is used in the surface coating process pigments.
Kaolin processing technology
The use of this technology, out of the calcined kaolin products, whiteness can be get 90% to 95%, 4500 ~ 6000 mesh size. The product with high white, ultra-fine calcined kaolin products, mainly used for paper, high-grade paint and other industrial fields.
1. beneficiation, ore crushing, ground powder of 325 mesh
2. The powder was added into the slurry water bucket and stir beating dispersant, ultrafine grinding to 4500-6000 mesh;
3. The slurry was dried microfine pulverized to break up, into the calciner is calcined by adding 1-3% of the total weight of the co-calcined whitening agents, co-agents is from white coal, sodium sulfate and sodium chloride composition, mixed by weight 10:0.3:0.2. Calcination temperature 970-990 ℃
4. beaten into a finished package
Required equipment
In order to meet the paper, plastics and rubber products industry for Kaolin have higher fineness, it is necessary to increase the fineness of kaolin, thereby enhancing the quality of the product. Ultrafine grinding proces are grinding stripping, high pressure extrusion, jet milling method. Kaolin milling equipment usually use the high pressure grinding mill or HGM micro powder grinding mill, etc.
Investment Prospects
Currently, the global output of about 40 million tons of kaolin (a simple sum of the data belonging to countries of production, which does not trade statistics ore, containing more double counting), which is about 23.5 million tons of refined earth. The paper industry is the largest consumer of refined kaolin sector, accounting for 60% of total consumption of kaolin. According to data provided by the Canadian consulting Temanex, 2000 global paper and paperboard production is about 319 million tons, the world's paper coating kaolin total amount of about 13.6 million tons. For general cultural paper, packing paper accounts for 10-20% by weight. For coated paper and paperboard (including lightweight coated paper, coated paper and coated paperboard), in addition to packing, but also need to paint, fill, the proportion of kaolin pigments for paper weight of 20-35%. Kaolin used in paper making, paper can give good coverage properties and good coating gloss performance, but also increase the whiteness of the paper, opacity, smoothness and printability, greatly improve the quality of the paper.