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A process for producing alumina by sintering method suitable for Australian ore

A technology of alumina and sintering method, which is applied in the preparation of alumina/aluminum hydroxide, alkali metal aluminate/alumina/aluminum hydroxide, etc. Mine and other issues

Active Publication Date: 2022-03-25
中铝山东新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the imported Australian ore has the characteristics of high organic matter content, etc., and the original domestic mineral alumina process is not suitable for Australian ore. The main performance is: (1) The foam entrained in the slurry increases, and the buffer pump does not feed frequently;
[0003] (2) Australian mines are prone to wetness and stickiness, and the material ports are frequently blocked during belt transportation

Method used

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  • A process for producing alumina by sintering method suitable for Australian ore

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Experimental program
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Effect test

Embodiment 1

[0042] A process for producing alumina by sintering suitable for Australian mines, including raw material preparation, clinker sintering, clinker dissolution, red mud separation and washing, atmospheric desiliconization, and carbonic acid decomposition to obtain aluminum hydroxide semen; Raw meal preparation includes: mixing 2 parts of Australian ore, 0.95 parts of gravel, 0.28 parts of raw coal, 0.25 parts of alkali powder, and 4.1 parts of evaporated lye to prepare raw meal slurry; during the sintering of the clinker, the clinker The alkali ratio is 0.93, and the clinker calcium ratio is 1.93.

[0043] In terms of weight percentage, the water content of the raw slurry is 39%.

[0044] The raw slurry is passed through a 120-mesh sieve.

[0045] In the sintering of the clinker, the bulk density is 1.2.

[0046] During the dissolution of the clinker, the dissolution temperature is 85°C.

[0047] In the dissolution of the clinker, the first-stage dissolution αk is 1.221.

[...

Embodiment 2

[0051] A process for producing alumina by sintering suitable for Australian mines, including raw material preparation, clinker sintering, clinker dissolution, red mud separation and washing, atmospheric desiliconization, and carbonic acid decomposition to obtain aluminum hydroxide semen; Raw meal preparation includes: mixing 2 parts of Australian ore, 0.98 parts of gravel, 0.28 parts of raw coal, 0.26 parts of alkali powder, and 4.2 parts of evaporated lye to prepare raw meal slurry; during the sintering of the clinker, the clinker The alkali ratio is 0.97, and the clinker calcium ratio is 1.97.

[0052] In terms of weight percentage, the water content of the raw slurry is 40%.

[0053] The raw slurry is passed through a 120-mesh sieve.

[0054] In the sintering of the clinker, the bulk density is 1.25.

[0055] During the dissolution of the clinker, the dissolution temperature is 90°C.

[0056] In the dissolution of the clinker, the first-stage dissolution αk is 1.1.

[0...

Embodiment 3

[0060] A process for producing alumina by sintering suitable for Australian mines, including raw material preparation, clinker sintering, clinker dissolution, red mud separation and washing, atmospheric desiliconization, and carbonic acid decomposition to obtain aluminum hydroxide semen; Raw meal preparation includes: mixing 2 parts of Australian ore, 1 part of gravel, 0.28 parts of raw coal, 0.26 parts of alkali powder, and 4.2 parts of evaporated lye to prepare raw meal slurry; during the sintering of the clinker, the clinker The alkali ratio is 1, and the clinker calcium ratio is 2.

[0061] In terms of weight percentage, the water content of the raw slurry is 41%.

[0062] The raw slurry is passed through a 120-mesh sieve.

[0063] In the sintering of the clinker, the bulk density is 1.3.

[0064] During the dissolution of the clinker, the dissolution temperature is 95°C.

[0065] In the dissolution of the clinker, the first-stage dissolution αk is 1.25.

[0066] In th...

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Abstract

The invention provides a process for producing alumina by sintering method suitable for Australian mines, including raw material preparation, clinker sintering, clinker dissolution, red mud separation and washing, atmospheric desiliconization, and carbonic acid decomposition processes to obtain aluminum hydroxide semen ; The raw material preparation comprises: by weight, 8-8.5 parts of Australian ore, 4-4.5 parts of gravel, 1-1.2 parts of raw coal, 1-1.2 parts of alkali powder, 16-16.5 parts of evaporated lye Parts are mixed uniformly to obtain raw slurry; in the sintering of the clinker, the clinker-alkali ratio is 0.93-1, and the clinker-calcium ratio is 1.93-2; the sintering method suitable for Australian mines provided by the embodiments of the present invention is used to produce The alumina semen produced by the alumina process can increase the A-net solution by 8.53%. Based on the monthly production requirement of the enterprise of 80,000 tons of clinker, it can generate at least 37.53 million yuan of income for the enterprise every year.

Description

technical field [0001] The invention belongs to the field of alumina production by sintering method, and in particular relates to a process for producing alumina by sintering method suitable for Australian mines. Background technique [0002] As the cost of domestic ore rises, the use of domestic ore in the production of alumina by sintering method leads to higher costs and even negative profitability. At present, in order to reduce the production cost of sintered alumina, enterprises producing alumina by sintering import Australian ore Substitute domestic ore. However, the imported Australian ore has the characteristics of high organic matter content, etc., and the original domestic mineral alumina process is not suitable for Australian ore. The main performance is: (1) The foam entrained in the slurry increases, and the buffer pump does not feed frequently; [0003] (2) The Australian ore is easy to get wet and sticky, and the material ports are frequently blocked during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02C01F7/08
CPCC01F7/02C01F7/08
Inventor 文钦果崔强李小坚戚平孟祥庆汪德超王晓明李强王飞钟强张新峰
Owner 中铝山东新材料有限公司