Synthetic mica, and preparation method and application thereof

A technology for synthesizing mica and quartz powder, which is applied in mica, chemical instruments and methods, silicon compounds, etc., can solve the problems of low heat and mass transfer efficiency, uneven heating of materials, and poor melt fluidity, so as to improve quality and absorb water The effect of low rate and high melting point

Active Publication Date: 2019-11-19
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of electrode heating, the fluidity of the molten melt is poor, the heat and mass transfer efficiency is low, the material is heated unevenly, and the yield of mica is low.

Method used

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  • Synthetic mica, and preparation method and application thereof
  • Synthetic mica, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Synthetic mica is made of 32 parts of quartz powder, 31 parts of fused magnesia, 16 parts of potassium fluorosilicate, 8 parts of alumina powder, 4 parts of potassium tetrafluoroaluminate and 0.5 part of potassium carbonate. The particle size of the quartz powder is 60-140 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0022] The particle size of the fused magnesia is 120-300 mesh, the purity is 96%-99%, and the water content is ≤0.5%.

[0023] The particle size of potassium fluorosilicate is 80-140 mesh, the purity is 96%-99%, and the water content is ≤0.5%.

[0024] The particle size of the alumina powder is 60-140 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0025] The particle size of potassium tetrafluoroaluminate is 80-200 mesh, the purity is 98%-99.5%, and the water content is ≤0.5%.

[0026] The particle diameter of the potassium carbonate is 100-160 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0027] The pr...

Embodiment 2

[0032] Synthetic mica is made of 34 parts of quartz powder, 28 parts of fused magnesia, 19 parts of potassium fluorosilicate, 10 parts of alumina powder, 6 parts of potassium tetrafluoroaluminate and 2 parts of potassium carbonate. The particle size of the quartz powder is 60-140 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0033] The particle size of the fused magnesia is 120-300 mesh, the purity is 96%-99%, and the water content is ≤0.5%.

[0034] The particle size of potassium fluorosilicate is 80-140 mesh, the purity is 96%-99%, and the water content is ≤0.5%.

[0035] The particle size of the alumina powder is 60-140 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0036] The particle size of potassium tetrafluoroaluminate is 80-200 mesh, the purity is 98%-99.5%, and the water content is ≤0.5%.

[0037] The particle diameter of the potassium carbonate is 100-160 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0038] The pr...

Embodiment 3

[0043] Synthetic mica is made of 38 parts of quartz powder, 26 parts of fused magnesia, 21 parts of potassium fluorosilicate, 14 parts of alumina powder, 8 parts of potassium tetrafluoroaluminate and 4 parts of potassium carbonate. The particle size of the quartz powder is 60-140 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0044] The particle size of the fused magnesia is 120-300 mesh, the purity is 96%-99%, and the water content is ≤0.5%.

[0045] The particle size of potassium fluorosilicate is 80-140 mesh, the purity is 96%-99%, and the water content is ≤0.5%.

[0046] The particle size of the alumina powder is 60-140 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0047] The particle size of potassium tetrafluoroaluminate is 80-200 mesh, the purity is 98%-99.5%, and the water content is ≤0.5%.

[0048] The particle diameter of the potassium carbonate is 100-160 mesh, the purity is 97%-99%, and the water content is ≤0.5%.

[0049] The pr...

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Abstract

The invention discloses synthetic mica. The synthetic mica is mainly prepared from the following raw materials: quartz powder, fused magnesia, potassium fluorosilicate, alumina powder, potassium tetrafluoroaluminate and potassium carbonate. The synthetic mica is applied to fabrication of flexible mineral insulated cables. A preparation method for the synthetic mica comprises the following steps: (1) fully and uniformly mixing quartz powder, fused magnesia, potassium fluorosilicate, alumina powder, potassium tetrafluoroaluminate and potassium carbonate in a mixer in proportion; (2) building a furnace body from refractory bricks, and installing graphite electrodes in the furnace body for heating, wherein the shape of the furnace body and a hearth are both of an oval shape to match with the arrangement of the electrodes; and (3) putting the materials uniformly mixed in the step 1 into the above furnace body for electrothermal calcination and melting, and then carrying out clarification, cooling and crystallization so as to obtain synthetic mica crystal blocks which are used for making the flexible mineral insulated cables. The yield of primary synthetic mica is improved. The syntheticmica of the invention has good light transmittance, low water absorption rate, high melting point, and almost no carbonization residue.

Description

technical field [0001] The invention relates to a synthetic mica and its preparation method and application, belonging to the field of insulating materials. Background technique [0002] Mineral Insulated Cable has been widely used in high-rise buildings, petrochemicals, airports, tunnels, ships, offshore oil platforms, aerospace, iron and steel metallurgy, shopping centers, parking lots and other occasions. Mineral insulated cables are divided into rigid mineral insulated cables and flexible mineral insulated cables. Among them, flexible mineral insulated cables have many excellent characteristics and have been generally recognized in practical applications. It meets the international general cable safety standards and has a long continuous length , whether it is a single-core or multi-core cable, the cross-section of a single-core cable can reach 1000mm 2 , multi-core cable section up to 240mm 2 . It can be coiled on the cable drum, and its bending radius is ≤20D. The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/42H01B3/04
CPCC01B33/42C01P2006/34C01P2006/80C01P2006/82C01P2006/90H01B3/04
Inventor 符靓彭程谢华林夏世全黄美华
Owner CHONGQING UNIV
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