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Material analysis
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Calcite Introduction

Calcite mineral, chemical formula CaCO3, main ingredients: CaO56%, CO244%. The trigonal crystal system is generally a hexagonal column, a rhombohedron, a complex trigonal trihedron, and a granular aggregate of each crystal form. The color is milky white, or slightly light red and other colors, brittle, hardness 2.704--3.0, specific gravity 2.6--2.8, parallel rhombohedral crystal plane, and the three groups are completely cleaved. Calcite is a calcium carbonate mineral, the most common of which is natural calcium carbonate. Therefore, calcite is a widely distributed mineral. Calcite has various crystal shapes. Their aggregates can be clusters of crystals, or they can be granular, massive, fibrous, stalactite, earthy, etc. Hitting calcite can get a lot of square fragments, hence the name calcite.

Colorless and transparent calcite is also called icelandite. Such a calcite has a wonderful feature that it can see the object as a double image through it. Therefore, glacial stone is an important optical material. Calcite is the main mineral of limestone and marble, and has many uses in production and life. We know that limestone can form karst caves. Stalactites and stalagmites and white marble in the caves are actually composed of calcite.




Recommended equipment for calcite processing
  • Recommended models: 6R4528

    Features: Suitable for fine powder production of 50-425 mesh

  • PF1315反击破 Recommended models: PF1315 counterattack

    Features: Simple and convenient operation and maintenance, uniform grain shape

  • Recommended models: superfine mill

    Features: Suitable for fine powder production and processing (425-2500 mesh), good performance, high pass rate

  • Recommended model: integrated suspension roller mill

    Features: Built-in reducer, easy installation, more durable roller and ring

Crushing process and process of calcite

Large pieces of calcite are uniformly fed into the first crusher (jaw crusher) by the feeder for coarse crushing. The coarsely crushed calcite is sent to the second crusher (impact crusher or cone crusher) by the belt conveyor. Machine) for further crushing; finely divided calcite is sent to a vibrating screen by a belt conveyor for screening, and several types of calcite of different sizes and specifications are screened out. Calcite that meets the particle size requirements is sent to the finished product pile by the finished belt conveyor. Calcite that does not meet the particle size requirements is returned by the belt conveyor to the impact crusher or cone crusher to be crushed again to form a closed circuit multiple cycles. The granularity of the finished product can be combined and classified according to user needs. To protect the environment, it can be equipped with auxiliary calcite processing and dust removal equipment.

If calcite needs to be ground, you need to add the corresponding grinding equipment. After the calcite is broken, it will be sent to the storage bin by the hoist, and then sent to the grinding room of the host by the vibrating feeder for corresponding grinding. After grinding to a certain extent, the shovel will lift the ground material into the Rolling between the grinding roller and the grinding ring, when it is rolled to the fineness required by various industries, it will be blown by a fan and dropped into the analysis machine for sorting. If the fineness is reached, it will be left behind. The fineness will be returned and then the corresponding grinding process will be performed again.

Application fields after calcite processing

Calcite is used in the chemical industry

In the chemical industry, it is mainly used as advanced fillers in petroleum products, rubber, plastics, papermaking, paints, coatings, medicine, cosmetics, and daily necessities such as toothpaste. To increase the tensile strength, whiteness, smoothness and wear resistance of the product. Generally, calcite ore with high whiteness, good crystallization and no impurities is pulverized into a powder of 120-400 mesh, which is called heavy calcium carbonate. Its physical properties are: oil absorption 20-25ml / 100g, average viscosity (L) 5-15, sedimentation volume 0.9-0.95ml / g, pH value 9.0-9.8, refractive index 1.66, whiteness 70% -90%, bulk density 2.7-2.8. Calcite powder, due to its superior performance, accounts for an increasing proportion in various fillers, generally reaching more than 30% and some exceeding 50%. Heavy calcium carbonate powder can be divided into coarse powder grade particle size 45-75μm; fine powder grade 10-45μm; fine powder grade 1-10μm. Coarse flour is generally used in feed additives and toothpaste abrasives. Fine powder is used in rubber fillers, pigments, paper fillers, medical additives, etc.

Application of calcite in filler:

a. Rubber: Calcite powder is used in the rubber industry as a compatibilizer, which can save the amount of natural rubber or synthetic rubber and reduce costs. The added amount of calcite powder is generally 10% -60%. Because of its good dispersibility, it can be mixed with rubber and mixed with other additives, which is beneficial to improve the processing performance of rubber, play a reinforcing or semi-reinforcing effect, and adjust the rubber hardness. The quality requirements of calcite powder for the rubber industry are: CaCO3> 99%, sieve balance (less than 44um) 0.2% oil absorption rate 70m1 / 100g.

b. Plastic: Calcite powder as a filler, its function is to (1) improve the dimensional stability of plastic products; (2) improve the hardness and rigidity of plastics; (3) change the processing performance; (4) improve heat resistance and resistance Flammability and insulation; (5) Improved astigmatism.

c. Papermaking: As a filler, the papermaking industry is the main user of calcite powder. The requirements of calcite powder for papermaking are: CaCO3> 98.5%, whiteness 90%, particle size 325 mesh, and 10% -40% calcite powder is added to the paper to ensure the strength of the paper. BaiDu. lower the cost. As a coating under neutral or alkaline conditions, the filling ratio of calcite powder in white color is: high-grade copper board paper 5% -20%, medium-grade copper board paper 10%-25%, coated paper 20% -80 %, Stamp paper 15% -70%, matte copper paper 70%-100%, calcite powder is used for papermaking, not only has high whiteness, but also can adjust the absorption of ink, and has better hiding power and optical properties. ,lower the cost.

Calcite for building and decorative stone

Calcite ore is widely used in the building materials industry due to its high whiteness, low hardness, and easy crushing. Such as architectural decoration ceramics, glass, exterior wall decoration leeches and so on. Calcite that has been deteriorated by hydrothermal contact is essentially white marble, also known as white marble, which is a good architectural carving stone and decorative plate. Calcite ore requires a large block, no impurity cracks, dense hard, fine and tight, white and beautiful stripe pattern. It is widely used in large-scale stone carvings, classical building railings, monuments and wall and floor slabs. Calcite has a compact structure, China Resources' milky white, grease and soft luster, with a certain size of blockiness, clear color, and is a good material for jade carving. Yichang Wufeng Zhangshuiping calcite was successfully carved a white jade lion by Henan Nanyang Jade Carving Factory. Its jade has been carved and polished to reveal its crystal-clear and dazzling luxurious crafts. Later, it was engraved in batches by the former Yichang Shenlong Jade Carving Factory. Its lady statues are slender, and the small animals come to life. In terms of brightness and whiteness, it is no less than sheep fat white jade.


Recommended Calcite Processing Solutions
Processing purpose: milling
Target hourly output: 10t / h
GYM4528磨粉机 *2 Recommended models: GYM4528 Mill * 2
Processing use: grinding powder
Target hourly output: 12t / h
Recommended model: 4528 high pressure mill

Shanghai Jianye Heavy Industry Machinery Co., Ltd. Address: No. 1389 Jinqiao Road, Pudong New District, Shanghai , Shanghai ICP No. 08511074 Shanghai Public Network Security No. 31011502002728

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