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Quartz mineral powder impurity removal system and impurity removal process

A mineral powder and quartz technology, which is applied in the field of quartz mineral powder impurity removal system and impurity removal process, can solve the problems of large differences in mineralization of quartz minerals, etc.

Active Publication Date: 2020-12-22
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in mineralization of quartz minerals, its impurity removal and purification degree is still a technical bottleneck in the high-purity quartz industry

Method used

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  • Quartz mineral powder impurity removal system and impurity removal process

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Comparison scheme
Effect test

Embodiment 1

[0026] A quartz mineral powder impurity removal system, comprising a high-temperature furnace 2, a refractory channel 5, a pickling pool 8, a filter 10, and a dryer 11 connected in sequence; a powder feeding spray gun 1 and a flame spray gun 3 are arranged in the high-temperature furnace , the powder feeding spray gun is located above the flame spray gun, the top of the high-temperature furnace is provided with an exhaust channel 6, the discharge port at the bottom of the high-temperature furnace is connected to the refractory channel 5, and the bottom of the refractory channel is connected to the feed port of the pickling pool The discharge port at the bottom of the pickling tank is connected to the filter, and the solid discharge port at the bottom of the filter is connected to the dryer.

[0027] The high-temperature furnace includes a powder feeding area, a flame combustion area and a feeding area from top to bottom in sequence. The powder feeding area is in the shape of a ...

Embodiment 2

[0036] A process for removing impurities from quartz mineral powder, the process utilizes the system described in Embodiment 1 to remove impurities, specifically comprising the following steps:

[0037] First, the quartz mineral powder with a purity of 2N or more is injected into the flame combustion zone of the high-temperature furnace from the top of the high-temperature furnace with hydrogen-oxygen flame combustion by using the purified dry compressed air as the carrier gas through the powder-feeding spray gun. Quartz mineral powder is directly melted under high temperature, and formed into balls by means of surface tension, and the solid density increases immediately, and begins to settle to the lower part of the high-temperature furnace, and is partially cooled during the settlement process.

[0038] Furthermore, the particles that settle to the bottom of the high-temperature furnace enter the refractory channel obliquely connected to the bottom of the high-temperature fur...

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Abstract

The invention belongs to the technical field of quartz powder production, and particularly relates to a quartz mineral powder impurity removal system and an impurity removal process. The impurity removal system comprises a high-temperature furnace, a refractory channel, a pickling tank, a filter and a dryer which are connected in sequence, a powder feeding spray gun and a flame spray gun are arranged in the high-temperature furnace, an exhaust channel is arranged at the top of the high-temperature furnace, a bottom discharge port of the high-temperature furnace is connected with the refractorychannel, and the bottom of the refractory channel is connected with a feed port of the pickling tank. A discharge port at the bottom of the pickling tank is connected with the filter, and a solid discharge port at the bottom of the filter is connected with the dryer. Quartz mineral powder is subjected to high-temperature melting, two times of quenching, acid pickling, filtering and drying in thesystem, and impurity removal can be achieved.

Description

technical field [0001] The invention belongs to the technical field of quartz powder production, and in particular relates to a quartz mineral powder impurity removal system and an impurity removal process. Background technique [0002] Fused silica can be used as raw material and coating material for the production of semiconductor polysilicon ingot crucibles, and can also be used as a filling material for silicon dioxide powder and organic materials in integrated circuit packaging, and can also be used as a raw material for high-purity quartz glass through further purification . The common purification process of quartz mineral raw materials includes high-temperature chlorination, calcination, pickling, flotation, melting, etc., and the combination of two or more of these processes is used to achieve the purification of quartz mineral raw materials. Due to the large difference in mineralization of quartz minerals, its impurity removal and purification degree is still a te...

Claims

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Application Information

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IPC IPC(8): C03B20/00C01B33/12
CPCC01B33/12C01P2006/80C03B20/00
Inventor 沈建兴国洪臣晁鑫赵祥刘世权
Owner QILU UNIV OF TECH
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