What are the uses of talcum block and talcum powder in Yuanlei small classroom?

Release time:

2024-01-29 09:35


What are the uses of talcum block and talcum powder in Yuanlei small classroom?


Talc is soft and smooth, soft luster, easy to carve, widely used in arts and crafts, medicine, daily chemical industry, paint, paper, radio ceramics, daily ceramics, rubber, cable, plastic, textile, linoleum, pesticide, building materials white cement and other fields.



The use of talc in industry often occurs in two states, one in powder form and the other in bulk form.


1, the use of talc


(1) Manufacture of block talc porcelainThe method is to add adhesives and ingredients to talc scrap, and use plastic molding method, grouting method, pressing method, etc. to make ceramic blank parts of various configurations, which can be made into porcelain after high temperature sintering at 1300 ℃ in the kiln. This block talc porcelain has good dielectric properties and mechanical strength. It is a high-frequency and ultra-high-frequency electrical porcelain insulating material, which can be used in radio receivers, transmitters, televisions, radars, radio direction finding, remote control and high frequency Electric furnace engineering, etc. In addition, because of its high temperature resistance, it can also be used in airplanes, automobiles, spark plugs, gas lamp nozzles, etc.


(2) make talcum chalkThe compact block talc is sawn into long thin slices. Its specifications can be different, and it is mainly used to mark symbols on copper plate castings. After processing or cooling, the marks are still clearly visible.


(3) Carving arts and crafts, daily talc products, etc..


(4) For some impure block talc, it can be sawed into bricks of different shapes as required, and used as the lining of the combustion chamber or kiln, or as an insulating electric plate.


2. Use of talcum powder


Talc powder is produced by crushing, fine grinding, and then air separation or flotation processing, and its use is more extensive than massive talc. In China, the annual output of talc powder accounts for about 3/5 of the annual output of talc ore, mainly used in the following 7 aspects.


(1) Paper industryTalc can make the paper smooth, aggravate, and enhance the adsorption capacity of printing inks and pigments, so it is mainly used as a filler. About 60% of talcum powder in China is used in the paper industry.


(2) Linoleum industryGenerally poor quality talcum powder, especially the one with high iron content, is mostly used in the manufacture of linoleum, roofing paper, asphalt shingles, roofing board fillers, fireproof and waterproof coatings, and anti-sticking powder. About 15% of talc is used in the linoleum industry.


(3) Daily chemical industryHigh-grade talcum powder is used at home and abroad to make high-grade cosmetics or in the pharmaceutical industry. It is used as a blending material to absorb grease and spices, to manufacture various high-grade cosmetics, toothpaste, soap, etc., or to prepare various ointments, medicines, powders and protective oils in medicine. The amount of this aspect generally accounts for about 15% of talc consumption in Europe and the United States, and 4%-6% of annual output in China.


(4) Rubber cable industry, Generally mixed with rubber as a filler and insulating material to manufacture various rubber products and cable rubber, which can enhance the strong performance and insulation of rubber. In addition, it is also used as an anti-private binding agent. Talcum powder used in this area accounts for 2% of the annual output in China.


(5) Ceramic industryIn the modern ceramic industry, in addition to the application of massive talc, but also a large number of applications of talcum powder. When different amounts of talcum powder are added, ceramic products can have different properties. For example, when 15% talcum powder is added, the product has strong toughness, translucency and bright color. When 30%-40% talcum powder is added, Dong Qingshi ceramic products can be manufactured. When 50%-60% talcum powder is added, the clay ceramic manufactured is a magnesium porcelain with high thermal stability, low linear expansion coefficient, good insulation performance, low dielectric loss, widely used in radio ceramics; when 40%-80% of talcum powder is added, it can make building ceramics such as ceramic tiles, tiles, etc. have minimal thermal expansion and moisture expansion, high strength, no cracking, and beautiful colors. Talc powder is also an indispensable raw material in the glaze used in the ceramic industry. However, in China's ceramic industry with talcum powder as the main ceramic blank is still relatively small, generally only used in glaze, so its dosage only accounts for 1%-2% of the output of talcum powder, while the United States for the ceramic industry talc, to account for 35% of the total consumption, ranking first in the world.


(6) Paint industry, Because talcum powder has strong oil absorption, it is easy to be highly dispersed in oil, which can prevent paint precipitation and adjust gloss. In addition, due to the stable chemical properties of talc and strong covering ability, it can prevent the aging and cracking of the paint coating and improve the weathering ability of the paint. General high-grade talcum powder used as paint filler and preparation of white paint. The talc used in the paint industry abroad accounts for about 20%-30% of the consumption of talc, and it is less used in China.


(7) Textile Industry, Ultrafine ground talcum powder is used in waterproof cloth, fireproof cloth, white cloth, rope and other fabrics, mainly as fillers and bleaching agents, to enhance the density of these textiles and heat resistance, acid and alkali resistance.


(8) OtherTalc powder has many other uses, such as raw material for white cement in cement industry, admixture and carrier for pesticide, lubricating material, mold coating, oil cloth and coated filler, adsorbent for grease and organic pigment, lubricant in tanning industry, polishing agent in glass industry and anti-sticking agent for candy.


In recent years, the use of talc at home and abroad has been further expanded. For example, talc is used as a filler in the plastics industry. In the synthetic rubber to join 40% of talc, the successful manufacture of new rubber products, with tensile, folding, wear resistance, high temperature resistance and other characteristics. In the construction industry, talc has been used to manufacture lightweight materials, such as plates, roofing tiles, etc. The proportion of talc as filler in the coatings industry is increasing. Application of low-grade talcum powder in wall brushing powder.

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