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Preparation method of quartz powder used for producing glass

A technology of quartz powder and glass, which is applied in the field of preparation of quartz powder for glass production, and can solve the problems of not considering the consistency of powder shape and powder fineness, affecting the glass melting process, powder bulk density and poor fluidity, etc.

Active Publication Date: 2016-01-27
湖南鑫生矿冶废弃物综合利用科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the quartz powder raw material prepared in the above patent application can meet the standard and be used, it only considers the grade and chemical composition index of the quartz powder, but does not consider the powder morphology and the consistency of the powder fineness, resulting in the bulk density and powder density of the powder. The fluidity is not good, which will affect the subsequent glass melting process

Method used

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  • Preparation method of quartz powder used for producing glass
  • Preparation method of quartz powder used for producing glass
  • Preparation method of quartz powder used for producing glass

Examples

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Effect test

Embodiment 1

[0029] This embodiment provides a method for preparing target quartz powder from raw quartz ore.

[0030] First select quartz ore with a silica grade greater than 98.5%, (Cr≤0.0005%, Co≤0.0005%, Mn≤0.0005%, Ni≤0.0005%, Pb≤0.005%, Cd≤0.005%, Cu≤0.001%, quartz The content of these elements in the raw ore should be basically satisfied), crush the better quartz ore selected according to this condition to an average particle size of 2-5mm, and select the colored impurities inside through a color sorter to make the silica grade Greater than 99.5%.

[0031] The color sorting finished product enters the ball mill for preliminary wet ball milling. The pulp is mainly composed of quartz powder and water. The ball volume accounts for two-thirds of the ball mill, and the quartz ore for ball milling accounts for one-third of the ball volume. The ball ratio is as follows: 40mm balls account for 20 %, 30mm balls account for 30%, 20mm balls account for 50%, the ball mill concentration is 60-7...

Embodiment 2

[0039] This embodiment provides a method for preparing target quartz powder from iron tailings.

[0040] The raw material is iron tailings, and the silica grade in the iron tailings is greater than 65% (Cr≤0.0005%, Co≤0.0005%, Mn≤0.0005%, Ni≤0.0005%, Pb≤0.005%, Cd≤0.005%, Cu≤ 0.001%, the content of these elements in the raw ore should basically meet the requirements).

[0041] First remove the fine mud in the iron tailings (the fine mud passing through the 400 mesh or 500 mesh sieve has a large amount of impurities, so it is removed first), and the grit enters the ball mill for preliminary ball milling. The ball volume accounts for two-thirds of the ball mill, and the ball milled quartz The ore accounts for one-third of the ball volume, and the ball proportion is as follows: 40mm balls account for 20%, 30mm balls account for 30%, 20mm balls account for 50%, the concentration of the ball mill is 60-70%, and the speed of the ball mill is 60 rpm. The ball mill and the 160-mesh h...

Embodiment 3

[0047] All the other conditions are the same as in Example 1 in this example, but the grinding aid is changed from 0.2wt% triethanolamine to 0.2wt% ethylene glycol. In the present embodiment, the bulk density of the quartz powder before and after shaping ball milling is by 0.95g / cm 3 up to 1.10g / cm 3 , the angle of repose decreased from 37.6 degrees to 36.3 degrees, and the bulk density of the quartz powder before and after surface modification was changed from 1.10g / cm 3 up to 1.18g / cm 3 , the angle of repose is reduced from 36.3 degrees to 35.0 degrees.

[0048] While using other grinding aids such as polymeric polyols, polymeric alcohol amines, triisopropanolamine and diethylene glycol, etc., the results of the bulk density and angle of repose of the obtained quartz powder are equivalent to the results of using ethylene glycol as grinding aids. Illustrate, in the shaping ball milling process of the present invention, use triethanolamine to have best shaping effect as gri...

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Abstract

The invention provides a preparation method of quartz powder used for producing glass. The preparation method comprises the steps of selecting quartz ores with silicon dioxide grade not less than 95% and average diameter of 2-5mm after grinding, firstly carrying out color sorting and impurity removal and then carrying out preliminary ball milling, shaping ball milling, flotation impurity removal, optional acid leaching impurity removal and surface modification successively, thus obtaining the quartz powder, wherein in the step of preliminary ball milling, balls with diameters of 15-45mm are adopted to carry out ball milling on the ores, and the balls used for preliminary ball milling are more than two kinds of balls with different diameters; in the step of shaping ball milling, balls with uniform diameters are adopted and the diameters of the balls are between 8mm and 20mm; a grinding aid containing alcoholic hydroxyl is also added in the step of shaping ball milling; and in the step of surface modification, the dried quartz powder is mixed with aerosil with grain size of 800-2000 meshes. The invention also provides a quartz powder preparation method with the characteristics that iron tailings are used instead of the quartz ores, and a magnetic separation process is added. The obtained quartz powder has high bulk density and low angle of repose under the condition that both the grade and chemical elements reach the standards.

Description

technical field [0001] The invention relates to the field of preparation of quartz powder, in particular to a preparation method of quartz powder for producing glass. Background technique [0002] The ultra-thin flat glass used in the flat panel display industry mainly includes cover glass, glass substrate and ITO conductive glass. Ultra-thin flat glass is one of the upstream key components with the largest procurement volume in the flat panel display industry. The main raw material for manufacturing ultra-thin flat glass is quartz powder, which accounts for more than 55% of the raw material. [0003] At present, the global manufacturers of cover glass used in the display industry are mainly Corning, Schott, Asahi Glass, etc., which occupy most of the market share. At present, the cover glass is mainly made of aluminosilicate glass, and the market is dominated by Corning Gorilla Glass, which is produced by the overflow method, and all quartz raw materials used are imported....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B1/00
Inventor 陈留慧陈述明王杨
Owner 湖南鑫生矿冶废弃物综合利用科技有限公司
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