Introduction to 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.
Application 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.
Talc Grinding process
Component analysis of Talc raw materials
|
SiO2 |
MgO |
4SiO2.H2O |
|
63.36% |
31.89% |
4.75% |
*Note: talc varies greatly from place to place, especially when the content of SiO2 is high, it is difficult to grind.
Talc powder making machine model selection program
|
Product specification |
400 mesh D99 |
325 mesh D99 |
600 mesh, 1250 mesh, 800 mesh D90 |
|
Model |
Raymond mill or Ultra-fine mill |
||
*Note: select the main machine according to the output and fineness requirements
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.HCH ultra-fine mill: low investment cost, energy saving, environmentally friendly, ideal equipment for 600-2500 mesh ultra-fine talc powder processing.
Stage I: Crushing of raw materials
The talc bulk material is crushed by the crusher to the feeding fineness (15mm-50mm) that can enter the grinding mill.
Stage II: Grinding
The crushed talc small materials are sent to the storage hopper by the elevator, and then sent to the grinding chamber of the mill evenly and quantitatively by the feeder for grinding.
Stage III: Classifying
The milled materials are graded by the grading system, and the unqualified powder is graded by the classifier and returned to the main machine for re grinding.
Stage V: Collection of finished products
The powder conforming to the fineness flows through the pipeline with the gas and enters the dust collector for separation and collection. The collected finished powder is sent to the finished product silo by the conveying device through the discharge port, and then packaged by the powder tanker or automatic packer.
Application examples of talc powder processing
Equipment model and number: 2 sets HC1000
Processing raw material: talc
Fineness of finished product: 325 mesh D99
Capacity: 4.5-5t/h
A large talc company in Guilin is one of the largest talc enterprises in China. Pharmaceutical grade talc pulverization has high requirements for Raymond machine equipment and technology. Therefore, after many communications with the owner's competent technical personnel, the scheme engineer of Guilin Hongcheng designed two hc1000 Raymond machine production lines. Guilin Hongcheng Raymond mill equipment is of high quality and considerate after-sales service. At the request of the owner, it has carried out Raymond mill transformation for many times and achieved remarkable results. Guilin Hongcheng company has been highly recognized by the owner.
Post time: Oct-22-2021
