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What is Talc?

Talc is a kind of silicate mineral, belongs to trioctahedron mineral, the structural formula is (Mg6)[Si8]O20(OH)4. Talc generally in bar, leaf, fiber or radial pattern. The material is soft and creamy. The Mohr’s Hardness of talc is 1-1.5. A very complete cleavage, easily split into thin slices, small natural angle of repose (35 ° ~ 40 °), very unstable, wall rocks are slippery and silicified magnesite petrochemical, magnesite rock, lean ore or dolomitic marble rock, generally not stable except for a few which are medium; joints and fissures, physical and mechanical properties of wall ores affect of the rock mining technology is great.

Usage of Talc

Talc has high performances of lubricity, sticky resistance, flow-aiding, fire resistance, acid resistance, insulativity, high melting point, inactive chemical property, good covering power, soft, good gloss, strong adsorption. So, talc has wide application in cosmetic, medicine, paper making, plastic and other fields.

1. Cosmetic: applied in skin moisten, after shave powder, talcum powder. Talc has the function of obstructing infrared ray, so it can improve the performance of cosmetics;

2. Medicine/food: applied in medicine tablets and powder sugar-coating, prickly heat powder, Chinese medicinal formulae, food additives, etc. The material has the advantages of non-poisonous, tasteless, high whiteness, good glossiness, soft flavor and high smoothness.

3. Paint/coating: applied in white pigment and industrial coating, base coating and protective paint, stability of the paint can be increased.

4. Paper-making: used as the filler of paper and paperboard. The paper product can be smoother and finer. It can also save up raw material.

5. Plastic: used as the filler of polypropylene, nylon, PVC, polyethylene, polystyrene and polyester. Talc can increase the tension strength, shearing strength, twisting strength and pressuring strength of plastic product.

6. Rubber: used as filler and adhesive of rubber.

7. Cable: used to increase cable rubber performance.

8. Ceramic: applied in electro-ceramic, wireless ceramic, industrial ceramic, construction ceramic, domestic ceramic and ceramic glaze.

9. Waterproof material: applied in waterproof roll, waterproof coating, waterproof ointment, etc.

Model selection and technological process in Talc powder processing

Talc material proximate analysis table

SiO2MgO4SiO2.H2O
63.36% 31.89% 4.75%

Talc with high content of SiO2 will be harder to grind.

Main mill model selection plan

Product specification400 mesh D99325 mesh D99600 mesh, 1250 mesh, 800 mesh D90
Model Raymond mill or Ultra-fine mill

1. Unit power consumption: 18-25kWh/t, material and product fineness;

2. Select the main mill model according to capacity and fineness requirement.

Analysis on grinding mill models

1. Raymond Mill: low investment cost, high capacity, low energy consumption, stable operation, low noise, is a high efficiency grinding mill for talc powder under 600 mesh.

2. Ultra-fine mill: low investment cost, energy saving, environmentally friendly, ideal equipment for 600-2500 mesh ultra-fine talc powder processing.

 

Talc powder processing technological process

Phase one: raw material crushing Talc blocks will be crushed to 15mm-50mm fineness by crusher.

Phase two: grinding Talc material will be sent to the storage hopper by the elevator, and than the feeder will send the material to the main mill for grinding.

Phase three: classifying Ground material will be classified, coarse powder will fall back to the main mill to be ground again.

Phase four: production collecting Qualified powder will flow with the air and be collected in the dust catcher, then the finished powder will be transported to the product storage bin through discharge port. Lastly, the powder will be loaded by tank car or packed by packing machine.

We offer full set of calcite powder processing solution to convoy your calcite powder project!

Learn more about powder processing integration service

Application examples of Talc powder processing

Some talc processing enterprise

Material: Talc

Fineness: 325mesh D99

Capacity: 4.5-5t/h

Configuration: 2 sets of HC1000

Customer feedback:

A talc enterprise is one of the largest talc enterprises in China, pharmaceutical-grade talcum powder has higher requirement on the Raymond machine, and Guilin Hong Cheng program engineers communicate with the owner in charge of technical on many occasions, decided to design 2 sets of HC1000 Raymond machine production line. Guilin Hong Cheng Raymond machine is high quality, thoughtful after-sales service, carry out a number of Raymond machine transformation as the owner required and achieved remarkable results, Guilin Hong Cheng has been highly recognized by the owner.

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