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Purification method for silica ore through chlorination roasting-leaching

A silicon dioxide, chlorination roasting technology, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of silica ore chlorination that have not been reported, and achieve high grade, high heat utilization rate and low quality requirements Effect

Active Publication Date: 2013-07-03
庄翔昊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As can be seen from the above description, chlorination roasting with ammonium chloride as the chlorination agent has been applied in the extraction of various metal minerals, but there is no report on the chlorination of silica ore.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 (preparation of high-temperature silica products): a method for purifying silica ore by chlorination roasting-leaching method, including the following steps:

[0035] ① Ore purification preparation:

[0036] After the silica ore enters the factory, it is roughly selected manually under the fluorescent lamp to remove the silica blocks containing inclusions, and is classified to indicate the purpose, and then the iron oxide, manganese oxide, carbonate, and green on the surface are removed with mixed acid Mud and stone, etc., washed to neutral, high-temperature calcination, water quenching, drying, selection, removal of obvious impurities such as iron oxide, magnetite, phlogopite and other impurities, and the required particle size powder after electric grinding .

[0037] ②Chlorination roasting operation and mixed acid bubble:

[0038] Mix silica powder and solid chlorinating agent at a ratio of 4-8%, put them in a mixer and mix them evenly, then transfer...

Embodiment 2

[0043] Example 2 (preparation of non-high-temperature silica products): a method for purifying silica ore by chlorination roasting-leaching method, including the following steps:

[0044] ① Ore purification preparation:

[0045] After the silica ore enters the factory, it is roughly selected manually under the fluorescent lamp to remove the silica blocks containing inclusions, and is classified to indicate the purpose, and then the iron oxide, manganese oxide, carbonate, and green on the surface are removed with mixed acid Mud and stone, etc., are washed to neutral, dried, and selected to remove obvious impurities such as iron oxide, magnetite, phlogopite, etc., and obtain the required particle size powder after electric grinding.

[0046] ②Chlorination roasting operation and mixed acid bubble:

[0047]Mix silica powder and solid chlorinating agent at a ratio of 4-8%, put them in a mixer and mix them evenly, then transfer them to a chlorination furnace to control the temp...

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Abstract

The invention relates to an extraction process for silica (quartz), in particular to a purification method for a silica ore through chlorination roasting-leaching. The purification method overcomes technical problems in selective removal of harmful elements like Fe, Cu, Al and Ti in the silica ore. The method comprises the following steps: crushing the silica ore and subjecting the crushed silica ore to water quenching at a high temperature; carrying out drying and grinding to obtain silica powder; mixing the silica powder with a chlorinating agent and placing an obtained mixture into an enclosed kiln for roasting; leaching out calcine with a mixed acid; and carrying out washing, neutralization and drying. According to the method, a variety of metal oxides are used to react with the chlorinating agent so as to remove impurities on the surface of the silica powder; thus, the method provided by the invention is superior to a flotation acid leaching process for purification of the silica ore, can replace a flotation method for purification of the silica powder and is more applicable to treatment of silicon oxide with a poor grade. Production process of the method accords with requirements of environmental production.

Description

technical field [0001] The invention relates to a purification process of silica ore. Specifically, it is a method for removing harmful metal elements in silicon dioxide ore powder by chlorination roasting-leaching method, and purifying the silicon dioxide powder. Background technique [0002] The photovoltaic industry and the development of high-tech science need to improve the quality of silica materials. Due to technical problems in process conditions, equipment, ore treatment, environmental pollution, etc., the acid leaching process adopted by the flotation method to purify silica powder can no longer meet the high-quality requirements. Therefore, the quality of the produced silicon dioxide material and the disadvantages of the acid leaching process directly affect the quality of silicon materials such as integration, solid circuit, optical communication, and solar energy utilization. Especially impurity elements: Fe, Cu, B are allowed in very small amounts in silica m...

Claims

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Application Information

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IPC IPC(8): C01B33/18
Inventor 庄思喆庄翔昊庄思源
Owner 庄翔昊
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