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Method for calcining and whitening feldspar micropowder

A technology of feldspar powder and feldspar, applied in the direction of non-metallic elements, etc., to achieve the effect of simple process, easy operation, and widening application fields

Inactive Publication Date: 2011-04-06
HANGZHOU TENGSHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods of whitening feldspar in domestic and foreign literature mainly focus on magnetic separation and pickling, while calcination is rarely mentioned as an effective whitening method for non-metallic minerals.

Method used

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  • Method for calcining and whitening feldspar micropowder

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Mix 20g of feldspar raw ore powder (78% whiteness, 800 mesh) with 2g of ammonium chloride, grind it evenly and pour it into a porcelain crucible. It was calcined at ℃ for 2 hours, and the calcined product was taken out and cooled, and its whiteness was measured to be 92% after grinding.

Embodiment 2

[0020] Mix 20g of feldspar raw ore powder (76% whiteness, 325 mesh) with 1g of ammonium chloride, grind it evenly, pour it into a porcelain crucible, put the porcelain crucible into a muffle furnace, and heat up to 900°C with the furnace. It was calcined at ℃ for 2 hours, and the calcined product was taken out and cooled, and its whiteness was measured to be 88% after grinding.

Embodiment 3

[0022] Mix 20g feldspar raw ore powder (76% whiteness, 325 mesh) with 0.85g ammonium chloride, grind evenly and pour it into a porcelain crucible, put the porcelain crucible into a muffle furnace and heat up to 900°C with the furnace. Calcined at 900°C for 1 hour, the calcined product was taken out and cooled, and its whiteness was measured to be 86% after grinding.

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Abstract

The invention provides a method for whitening feldspar micropowder, and belongs to the chemical field of materials. The method comprises the following steps of: (1) mixing crude feldspar mineral powder with whiteness of between 70 and 78 percent and particle diameter of between 100 and 800 meshes and ammonium chloride (chemically pure or above) in a mass ratio of (10-50):1, uniformly grinding and pouring into a porcelain crucible; (2) placing the porcelain crucible into a muffle furnace, heating to 700 to 1,100 DEG C along with the furnace, and preserving heat for 1 to 5 hours; and taking out, cooling and crushing to obtain the whitened feldspar micropowder with the whiteness of over 85 percent and the particle diameter of between 100 and 2,000 meshes. By the method, the whiteness of the crude feldspar mineral powder with whiteness of between 70 and 78 percent is improved to be over 85 percent, the feldspar product with high quality is obtained, and the application field of the feldspar mineral is expanded. The method is easy to operate, contributes to industrial production, has low cost and is environmentally-friendly.

Description

(1) Technical field [0001] The invention relates to a method for whitening feldspar powder, which belongs to the field of material chemical industry. (2) Background technology [0002] Feldspar is a potassium, sodium and calcium aluminum silicate mineral with a framework structure composed of silicon-oxygen tetrahedrons. It has a melting effect when eutectic with quartz and aluminum silicate. The hardness of feldspar is 6-6.5, and the density is 2.55-2.76g / cm 3 , glass luster, brittleness, high Compressive strength , has a strong acid chemical stability ; High oil absorption rate, good coverage, insulation and other characteristics. At present, the application fields of feldspar mainly include glass industry, ceramic industry, chemical raw materials and fillers, abrasives, potash fertilizers, etc. [0003] Feldspar ore is an important mineral in non-metallic minerals. The main producing areas of feldspar ore in my country are: Haicheng, Liaoning, Pingjiang, Hunan, Jinta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20
Inventor 张俭张津瑞
Owner HANGZHOU TENGSHI TECH
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