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Liaoning talc powder manufacturers introduce the composition and classification of talc powder

2022-04-25 17:02:19

The main component of talc powder is hydrated magnesium silicate. The talc is crushed, treated with hydrochloric acid, washed with water and dried to form talc. Talc is a silicate with chemical structure Mg6(Si2O5)4(OH)4. Talc is extremely soft and smooth, has the ability to lubricate, cover and absorb grease, can withstand temperatures up to 1300°C, has low electrical and thermal conductivity, and generally does not react with acids and bases. Widely used in medicine, cosmetics, papermaking, ceramics, rubber, environmental management and other fields.

1. Physical and chemical properties of talc:

Liaoning talc powder manufacturers introduce that talc powder is white or quasi-white, fine powder without sand, the cleavage surface is pearly, odorless, tasteless, and greasy. Easy to adhere to the skin, insoluble in water, dilute hydrochloric acid or 8.5% sodium hydroxide solution. Hardness 1.0-1.5. Refractive index 1.54-1.59. Specific gravity 2.7-2.8. Specific surface area 2.41-2.42 m2·g-1.

2. Classification of talc powder:

According to the physical form, talc powder can be divided into three types: fibrous, non-fibrous and massive.

Fibrous talc is associated with tremolite, amphibole and serpentine; non-fibrous talc usually contains turpentine and carbonate; talc has a high content of talc, up to 70%, and is often used in medicine. According to the crushing particle size, it is talc powder, which is divided into finely ground talc powder, finely crushed talc powder and ultra-fine talc powder according to national standards.

3. Processing of talc powder:

About 90% of the world's talc is applied in the form of pulverization, so the processing of talc mainly includes two processes of beneficiation and grinding.

Liaoning talc powder manufacturers introduce talc mineral processing methods including physical method, chemical method and physical chemical method, which can be divided into manual sorting, photoelectric sorting, electric separation, magnetic separation, precipitation scrubbing and screening. Raymond mill, mechanical impact mill, jet mill and other equipment are commonly used in talc grinding. High-pressure roller mills and Raymond mills are suitable for processing talc powder with larger particle size, and ultra-fine grinding is mainly used for processing talc powder with smaller particle size.



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