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Preparation method for high-purity fused quartz powder material applied to quartz ceramic crucible

A technology of fused silica powder and quartz ceramics, applied in the direction of silicon dioxide, silicon oxide, etc., can solve problems such as affecting the production of downstream products, low product added value, outstanding environmental protection problems, etc., achieving significant purification effect, high mechanical strength, and improved The effect of yield

Inactive Publication Date: 2011-10-19
SINOMA JIANGSU SOLAR ENERGY NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SiO in fused silica produced on a large scale 2 The content has been unable to break through 99.99%, the product has low added value, high energy consumption, prominent environmental protection problems, and serious waste of resources
To obtain high-purity fused silica (SiO 2 ≥99.99%), only high-purity crystals can be used as raw materials, and can be produced by gas refining, electric melting, arc or CVD synthesis. The cost is expensive, and the price is ≥20,000 yuan / ton, which seriously affects the production of downstream products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: In this embodiment, the hydrothermal vein quartz produced in Donghai County, Jiangsu Province is used as raw material, and processed according to the following procedures:

[0020] 1. Use a hammer crusher to crush the hydrothermal vein quartz ore to a size of 1 to 3 cm; use water washing and grading desliming methods to remove impurities attached to the raw quartz ore. After drying, manually sort to The naked eye can easily identify and discard non-quartz impurities;

[0021] 2. After cleaning, the 1-3cm quartz ore is subjected to electrostatic decontamination. The rotational speed of the electrostatic decontamination drum is selected as 100r / min, the voltage is 18,000 volts, and the electrostatic decontamination cycle is 2 hours per ton. For 1-3cm quartz The ore continues to be finely crushed to 80 meshes, and the magnetic field strength reaches 100000e high-gradient magnetic separator for magnetic separation, and the magnetic separation cycle is 1 hour p...

Embodiment 2

[0025] Embodiment 2: the present embodiment takes the vein quartz produced in Donghai County, Jiangsu Province as raw material, and processes it according to the following procedures:

[0026] 1. Use a hammer crusher, jaw crusher or manually crush the vein quartz ore to less than 2 cm, sort and discard the non-quartz impurities that can be easily identified by the naked eye;

[0027] 2. After cleaning, the 1-2cm quartz ore is subjected to electrostatic decontamination. The rotational speed of the electrostatic decontamination drum is selected as 100r / min, the voltage is 18,000 volts, and the electrostatic decontamination cycle is 2 hours per ton. For 1-2cm quartz The ore continues to be finely crushed to 110 mesh, and magnetic separation is carried out by a high-gradient magnetic separator with a magnetic field strength of 100,000e, and the magnetic separation cycle is 1 hour per ton;

[0028]3. Use chemical removal of impurities on the magnetically separated quartz ore, first...

Embodiment 3

[0031] Embodiment 3: Part of the original high-quality vein quartz in Donghai County, Jiangsu Province is destroyed, transported and piled up together by the geological movement in the later stage, forming vein quartz weathering type residual deposits, slope accumulation quartz gravel layers, commonly known as stone sheds, this quartz gravel The fragments of multiple quartz veins are mixed together, and have been polluted to a certain extent; this embodiment uses the residual and slope-type vein quartz gravels produced in Donghai County, Jiangsu Province as raw materials, and is processed according to the following procedures:

[0032] 1. Manually sort and select the quartz gravel with less impurities and less pollution, use a hammer or jaw crusher to crush the quartz gravel with water to less than 2cm, and use a 2mm aperture sieve for screening, 2mm The underscreen is discarded, and the quartz fragments are put into an autogenous mill for self-grinding for 1 hour to remove com...

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Abstract

The invention discloses a preparation method for high-purity fused quartz powder material applied to quartz ceramic crucible. The preparation method comprises the following steps: taking common vein quartz or hypergene quartz gravel of vein quartz as raw material, and adding the step of fused purification and rolling ball crushing based on the comprehensive impurity removing, and finally preparing high-purity fused powder material applied to quartz ceramic crucible. In the invention, the resource utilization ratio of the vein quartz is improved to more than 80% from about 50%, the SiO2 content of high-purity quartz sand produced by the common quartz ore achieves to more than 99.99%, the element impurity content is controlled in 30ppm, the liquidity of powder slurry with 85%-90% of solid containing content achieves to 120g / s.

Description

technical field [0001] The invention relates to a processing method for a quartz powder material, in particular to a preparation method for a high-purity fused silica powder material applied to a quartz ceramic crucible. Background technique [0002] Quartz material has a series of excellent properties such as: high temperature resistance, small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and its unique optical properties, making it widely used as silicon raw material in building materials, chemical industry, Electronics, electrical engineering, military industry, aerospace and other industries. [0003] The index requirements of high-purity fused silica powder for quartz ceramic crucible include three aspects: product solidification fluidity, product purity and impurity composition. difficulty. [0004] At present, the materials for preparing fused silica ceramic crucibles in my country mainly use high-quali...

Claims

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Application Information

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IPC IPC(8): C01B33/12
Inventor 王祥
Owner SINOMA JIANGSU SOLAR ENERGY NEW MATERIALS
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