Combination production method for obtaining multi-products using high iron bauxite as raw material

A high-iron bauxite and production method technology, applied in chemical instruments and methods, iron oxide, iron halide, etc., can solve the problems of high energy consumption, high cost of aluminum-silicon alloy, long production process, etc., and achieve economic benefits Good, low cost, high added value effect

Inactive Publication Date: 2009-01-07
辽宁建元投资发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the process from ore to finished product needs to go through multiple processes such as alumina plant, electrolytic aluminum plant, and industrial silicon plant. The production process is long and energy consumption is high, which makes the cost of aluminum-silicon alloy remain high, and the production process has a great impact on the environment.

Method used

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  • Combination production method for obtaining multi-products using high iron bauxite as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] The first step: material preparation

[0113] Use a crusher to crush the high-iron bauxite to a particle size of 0.1-25 mm to obtain crushed materials;

[0114] Grinding the pulverized material with ore grinding equipment to obtain ground powder;

[0115] Use a classifier to select the grinding powder material with a particle size of 50-150 μm to obtain high-iron bauxite fine powder;

[0116] In the present invention, the grinding powder material not selected by the classifier can continue to be ground by grinding equipment;

[0117] The present inventor analyzes the composition of the high-iron bauxite mining in the Aksu area of ​​Xinjiang and obtains: iron oxide Fe 2 o 3 20wt%, iron silicate FeSiO 3 5wt%, aluminum oxide Al 2 o 3 58wt%, silicon oxide SiO 2 It is 6wt%, and the balance is other impurities. Impurities are generally carbonate minerals (such as magnesium carbonate, calcium carbonate and dolomite), silicate minerals.

[0118] The second step: prepar...

Embodiment 2

[0156] The first step: material preparation

[0157] Use a crusher to crush the high-iron bauxite to a particle size of 0.1-25 mm to obtain crushed materials;

[0158] Grinding the pulverized material with ore grinding equipment to obtain ground powder;

[0159] Use a classifier to select the grinding powder material with a particle size of 50-150 μm to obtain high-iron bauxite fine powder;

[0160] In the present invention, the grinding powder material not selected by the classifier can continue to be ground by grinding equipment;

[0161] The composition of high iron bauxite is: iron oxide Fe 2 o 3 15wt%, iron silicate FeSiO 3 10wt%, alumina Al 2 o 3 60wt%, silicon oxide SiO 2 It is 3wt%, and the balance is other impurities. Impurities are generally carbonate minerals (such as magnesium carbonate, calcium carbonate and dolomite), silicate minerals.

[0162] The second step: preparation of extract

[0163] (A) Putting the high iron bauxite fine powder and the hydroc...

Embodiment 3

[0199] The first step: material preparation

[0200] Use a crusher to crush the high-iron bauxite to a particle size of 0.1-25 mm to obtain crushed materials;

[0201] Grinding the pulverized material with ore grinding equipment to obtain ground powder;

[0202] Use a classifier to select the grinding powder material with a particle size of 50-150 μm to obtain high-iron bauxite fine powder;

[0203] In the present invention, the grinding powder material not selected by the classifier can continue to be ground by grinding equipment;

[0204] The composition of high iron bauxite is: iron oxide Fe 2 o3 17wt%, iron silicate FeSiO 3 5wt%, aluminum oxide Al 2 o 3 60wt%, silicon oxide SiO 2 It is 8wt%, and the balance is other impurities. Impurities are generally carbonate minerals (such as magnesium carbonate, calcium carbonate and dolomite), silicate minerals.

[0205] The second step: preparation of extract

[0206] (A) put the high-iron bauxite fine powder and the hydroc...

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Abstract

The invention discloses a combination production method for industrially producing a plurality of products by using high-iron alumyte as a material. The combination production method comprises the steps of performing pressure-leaching the high-iron alumyte by using hydrochloric acid as a leaching medium, iron enters the hydrochloric acid in the form of ion to form the chloride of iron, aluminum is left in solid alumyte, thereby separating iron from aluminum; roasting a hydrochloric acid leaching fluid to obtain iron oxide red and a chlorine hydride gas, wherein the chloride hydride gas is absorbed by washing water and becomes hydrochloric acid, which can be recycled; and melting the upper layer of products, conducting directional crystallization to prepare a cocrystallized Al-Si alloy with silica content below 14wt%. Therefore, the high-iron alumyte which cannot be utilized currently, can be comprehensively utilized.

Description

technical field [0001] The invention relates to a production method for separating and obtaining alloy materials, more particularly, a combined production method for separately preparing eutectic aluminum-silicon alloy, iron red and solar-grade polysilicon from high-iron bauxite. Background technique [0002] my country's high-speed iron bauxite reserves are very rich. According to the data analysis of the geological survey department, its prospective reserves are more than 2 billion tons. These high-speed iron bauxite are potential mineral resources for my country's aluminum industry and steel industry. The contents of alumina (about 50wt%) and iron oxide (about 13wt%) in high-iron bauxite are relatively low, which cannot meet the requirements of their respective industrial utilization grades, but the main useful minerals in high-iron bauxite are diaspore, The sum of goethite and hematite or other iron ores accounts for about 70wt% of the total amount of minerals. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02C01G49/06C01B33/12C01G49/10C01F11/24C01F5/30C01B7/01C01B33/021C22C21/02
Inventor 卢惠民杜宁杜福林
Owner 辽宁建元投资发展有限公司
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