Method for preparing cristobalite powder by using natural konilite

A technology of cristobalite powder and process method, which is applied in the direction of silicon oxide, etc., can solve the problems of unstable synthetic quality of cristobalite powder, large output of cristobalite powder, and low production cost, and achieve low production cost, small thermal conductivity, and conversion high rate effect

Inactive Publication Date: 2008-01-09
袁茂豪
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  • Application Information

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Problems solved by technology

At present, the domestic and foreign methods of preparing cristobalite powder generally include synthetic chemical method and block quartz direct calcination method. Since the synthetic chemical method uses quartz sand for chemical treatment first, and then high-temperature calcination reduction to prepare cristobalite powder, It requires a huge chemical treatment device, so this preparation method has large investment, high production cost, and the synthetic quality of cristobalite powder i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1, after the natural powder quartz produced by natural powder quartz ore is washed with water, the impurities and mud in it are suspended on the surface, filtered and removed, the filter is washed and filtered with pure water, centrifugal dehydration and dried, and then Baking and dispersing treatment to make powdered quartz, or add appropriate amount (to make the natural powder quartz in a thick state after stirring) sodium silicate binder and stir after dehydration and drying, (sodium silicate is formed by high temperature Nano-scale silica powder, in which sodium oxide is sublimated at 1275°C), the water content is controlled at 0.8%, and it is made into brick-shaped or honeycomb-shaped block powder quartz, which is convenient for kiln installation, and then passed through a batch kiln at 1560°C, Heat preservation for 8 hours and calcining, among them, powdered quartz can also be directly burned by blowing and spraying. After cooling, it is dispersed, pulve...

Embodiment 2

[0011] Embodiment 2, the natural powder quartz produced with natural powder quartz ore is neutralized by acid washing and adding alkali, so that impurities and mud are suspended on the surface, then filtered, and 0.5% of natural powder quartz weight is added in the filter. ammonium chloride, the pH value of its natural quartz powder after testing is 11.5, after centrifugal dehydration and drying, then roasting and dispersing treatment to make powdery quartz, or add an appropriate amount after dehydration and drying (to make natural powder quartz after stirring) When the content is in a thick state), the sodium silicate binder is stirred and dispersed, (sodium silicate forms nano-scale silicon micropowder through high temperature, and sodium oxide sublimates at 1275°C), and the water content is controlled at 0.8%. Brick-shaped or honeycomb-shaped block powder quartz is convenient for kiln installation, and then it is calcined in a batch kiln at 1470 ° C for 4 hours. Among them, ...

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PUM

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Abstract

A process for producing square quartz powder from natural quartz powder is carried out by washing natural quartz powder, filtering, dewatering for filtrate, drying, baking and dispersing into powder or dewatering and drying, adding into binder to make into block or honey-comb natural quartz, putting powdered, block or honey-comb natural quartz into high-temperature furnace of 1380-1600 deg. C, keeping temperature for 1-10 hrs, forge firing, cooling, dispersing, milling, magnetic separating, dry blowing and grading. It costs low and has more yield, better whiteness, and higher conversion and less iron and aluminum elements. It can be used as coating, filter acids of insulating material, ceramic and pesticide, filling additives of glass and plastic and sanding and polishing materials of precision casting and chip.

Description

technical field [0001] The invention relates to a process for preparing quartz powder, in particular to a process for preparing cristobalite powder. Background technique [0002] With the continuous development of science and technology, cristobalite powder processed by various processes has low density, high hardness, high whiteness, dispersibility, suspension, chemical stability, plasticity, light scattering and insulation. nice feature. Therefore, it has a wide range of industrial applications, and can be used as a filler for the manufacture of coatings, glass, paper, paint, plastics, rubber and adhesives, as well as materials for precision casting, electronic chip grinding and polishing. According to market research and analysis, the global annual demand for cristobalite powder used in the above industries is at least tens of billions of RMB. At present, the domestic and foreign methods of preparing cristobalite powder generally include synthetic chemical method and bl...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/64C04B35/10C01B33/113
Inventor 袁茂豪袁超袁君袁茂清罗招梅晏平强廖小明袁养军周承武
Owner 袁茂豪
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