Technology for preparing high cover performance calcined kaolin through coal gangue

A technology of calcining kaolin and coal gangue, which is applied in the direction of inorganic chemistry, silicon compounds, chemical instruments and methods, etc., can solve problems such as unsatisfactory covering performance, achieve the effect of improving particle size distribution range, reducing cost and maintaining uniformity

Active Publication Date: 2017-02-15
山西晋坤矿产品股份有限公司
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AI Technical Summary

Problems solved by technology

Although the price of ordinary calcined kaolin products is relatively low (2000 yuan / ton), due to its unsatisfactory hiding performance, manufacturers of high-end paints, especially those with outstanding covering performance requirements, rarely use calcined kaolin as a filler

Method used

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  • Technology for preparing high cover performance calcined kaolin through coal gangue

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Embodiment 1

[0029] Embodiment 1. A process for preparing calcined kaolin with high covering performance from coal gangue, the steps are: raw coal gangue → primary iron removal → crushing → mineral processing → screening → secondary iron removal → dry grinding → tap water pulping → Iron removal→wet grinding→twice iron removal→drying→disintegration→calcination→disintegration→product.

[0030] First of all, before crushing, large pieces of quartz, carbon blocks and other impurities mixed in coal gangue are removed by hand to ensure the purity of materials before crushing, and the broken coal mixed in gangue is removed by double-layer vibrating screen. Electromagnetic iron remover and permanent magnet iron remover are installed before and after for primary iron removal and secondary iron removal, which not only protects the equipment but also facilitates iron removal.

[0031]When making pulp, increase the solid content of the slurry to 53-57%. In the wet grinding section, add 100 mesh, 325 m...

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Abstract

The invention relates to a technology for preparing kaolin through coal gangue, in particular to a technology for preparing high cover performance calcined kaolin through coal gangue. The technology improves the technical problem that the high cover of kaolin prepared through coal gangue is low. The technology comprises the following steps: coal gangue raw ore selection, primary deironing, crushing, beneficiation, sieving, secondary deironing, dry ore grinding, tap water slurrying, tertiary deironing, wet ore grinding, deironing again, drying, scattering, calcining, scattering and product obtaining. The calcined kaolin has the advantage that the color developing performance and cover performance of the kaolin are superior to that of common calcined kaolin, and the successful development of the high cover performance calcined kaolin increases the additive amount of the calcined kaolin in a high-grade coating formula by 10 percent, and reduces the additive amount of titanium dioxide in the high-grade coating formula.

Description

technical field [0001] The invention relates to a technology for preparing kaolin from coal gangue, in particular to a process for preparing calcined kaolin with high covering performance by using coal gangue. Background technique [0002] Coal gangue is a kind of coal-based kaolin. Its characteristic is that the raw ore is dark brown, and its whiteness is higher after calcination. Refractory materials and other fields. Different processing techniques can endow products with different application functions. The present invention is a technique for preparing calcined kaolin with high covering performance by using coal gangue. [0003] Usually the paint industry uses titanium dioxide as the main filler. Its advantage is that it can give the paint a high hiding power. The disadvantage is that it is more expensive (10,000 yuan / ton), resulting in a higher cost of paint formulation. For this reason, the paint industry has been looking for a cost-effective filler to replace part ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 曹永新李亚军李文杰刘继文任向上武春韩信年建国解金花
Owner 山西晋坤矿产品股份有限公司
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