Method for integrally utilizing high-iron-content bauxite

A high-speed iron bauxite and immersion iron technology, applied in chemical instruments and methods, iron oxides, ammonia compounds, etc., can solve the problems of high energy consumption, short furnace lining life, large electrical energy consumption, etc., and meet the requirements of simple process flow and equipment. The effect of low cost and low production cost

Inactive Publication Date: 2012-05-02
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

Among them, the granular iron method is technically difficult; the pig iron clinker method has the problem of short life of the rotary kiln lining and high energy consumption; the chemical reduction of metals-electric furnace dissolution-extraction of alumina is technically feasible, but the power consumption Large, and Guangxi is currently short of power resources; sintering-blast furnace smelting-extracting alumina is technically feasible, but the separation of slag and iron is not complete, and the alumina leaching rate is low

Method used

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  • Method for integrally utilizing high-iron-content bauxite
  • Method for integrally utilizing high-iron-content bauxite
  • Method for integrally utilizing high-iron-content bauxite

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Embodiment 1

[0029] The main composition of the high-iron and low-grade bauxite used is: Al 2 o 3 29.8%, Fe 2 o 3 50.7%, SiO 2 14.0%, TiO 2 1.8%, MnO 1.5%, other 2.2%.

[0030] Crush the high-iron bauxite, grind it down to 80 μm, and mix it evenly with 70% sulfuric acid at a mass ratio of 1:2.2. The material is roasted at 350°C and kept at a constant temperature for 2 hours. The flue gas generated by the reaction is absorbed by dilute sulfuric acid, and then returned to Roasting.

[0031] Add water to dissolve the roasted clinker, the mass ratio of water and clinker is 3:1, dissolve at 50°C for 60 minutes, filter to obtain a mixed solution of aluminum slag, iron sulfate, and aluminum sulfate, and use the aluminum slag directly as micro-silicon powder.

[0032] Use saturated ammonium carbonate solution to adjust the pH of the clinker solution to 1.5, add jarosite seeds, stir and react at 80°C for 2 hours, then filter, the filtrate mainly contains NH 4 + 、Al 3+ , SO 4 2- and a...

Embodiment 2

[0038] The main composition of the high-iron and low-grade bauxite used is: Al 2 o 3 27.9%, Fe 2 o 3 49.2%, SiO 2 15.7%, TiO 2 1.7%, MnO 1.6%, other 3.9%.

[0039] Crush the high-iron bauxite, grind it down to 80 μm, and mix it with 98% concentrated sulfuric acid at a mass ratio of 1:2.5. The material is roasted at 500°C and kept at a constant temperature for 1 hour. The flue gas generated by the reaction is absorbed by dilute sulfuric acid, and then returned to use for roasting.

[0040] Add water to dissolve the roasted clinker, the mass ratio of water to clinker is 5:1, dissolve at 90°C for 30 minutes, filter to obtain a mixed solution of aluminum slag, iron sulfate, and aluminum sulfate, and use the aluminum slag directly as micro-silicon powder.

[0041] Use saturated ammonium carbonate solution to adjust the pH of the clinker solution to 2.0, add jarosite seeds, stir and react at 90°C for 1 hour, filter, and the filtrate contains NH 4 + 、Al 3+ , SO 4 2- an...

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Abstract

The invention relates to a method for integrally utilizing high-iron-content bauxite, which comprises the following steps that: (1) the high-iron-content bauxite is crushed and finely ground and is then roasted with sulfuric acid; (2) roasted clinker is dissolved and filtered for obtaining coarse aluminum sulfate solution and extracted aluminum slag; (3) the coarse aluminum sulfate solution is subjected to iron settling by a metavoltaite method, then, the deep iron settling is carried out by phosphoric acid or ammonium phosphate, the obtained solution is subjected to aluminum settling, and aluminum hydroxide is obtained; (4) the aluminum hydroxide is calcined for preparing aluminum oxide; (5) ammoniojarosite is calcined for preparing ferric oxide; (6) iron phosphate is hydrolyzed for obtaining ferric hydroxide and ammonium phosphate; and (7) the extracted aluminum slag is directly used as silica fume.

Description

Technical field [0001] The present invention involves a method of dealing with high -speed rail aluminum ore, which specifically involves an extraction from high -speed rail aluminum ore ore, and prepared aluminum, iron oxide and silicon oxide products to achieve comprehensive comprehensive high -speed rail aluminum mine resources comprehensivedevelop and use. Background technique [0002] With the rapid development of my country's economy, the consumption of the first and second -largest metal iron and aluminum consumption of the sustainable development of the national economy is also increasing.In the 1980s, my country found a large number of high -speed rail aluminum mines in Guangxi and other places, with resource reserves exceeding 160 million tons.The mine has three characteristics: First, the use of traditional mineral selection methods cannot effectively separate iron, aluminum, silicon and other elements.Because iron minerals and aluminum minerals have thin granularity a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02C01G49/06C01F7/02C01C1/242
Inventor 翟玉春辛海霞申晓毅王佳东王若超
Owner NORTHEASTERN UNIV LIAONING
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