Carbonate type high-silicon bauxite beneficiation method

A technology of high-silicon bauxite and ore dressing method, which is applied in flotation, solid separation, etc., and can solve the problem of ineffective removal of carbonate impurities

Active Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

For carbonate-type high-silicon bauxite, the floatability of carbonate-type gangue minerals is similar to that of bauxite. Therefore, the traditional single flotation process for carbonate-type high-silicon bauxite can only Reduce SiO 2 content to increase the ratio of aluminum to silicon, but cannot effectively remove the carbonate impurities
At present, there is still a lack of a beneficiation method that can effectively treat carbonate-type high-silicon bauxite

Method used

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  • Carbonate type high-silicon bauxite beneficiation method

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Effect test

Embodiment 1

[0032] Embodiment 1: the present embodiment takes high-grade Yunnan carbonate type high-silicon bauxite as the research object, and Al in the ore 2 o 3 The grade is 42.94%, SiO 2 The content is 17.30%, and the aluminum-silicon ratio is 2.48; the gangue minerals are mainly quartz, dolomite, kaolinite and calcite.

[0033] Such as figure 1 and 2 Shown, a kind of beneficiation method of carbonate type high-silicon bauxite, concrete steps are as follows:

[0034] (1) Crushing, screening, grinding, and grading the raw ore to -0.074 mm accounted for 80% to obtain fine-grained bauxite ore samples;

[0035] (2) Add 400g / t of sodium oleate, 1000g / t of water glass, and 100g / t of No. 2 oil to the fine-grained bauxite sample in step (1), and roughen for 4 minutes to obtain the roughened concentrate and rough beneficiation; wherein the mass percentage of alumina in the rough beneficiation concentrate is 46.42%, the mass percentage of silicon dioxide is 6.27%, and the mass ratio of alu...

Embodiment 2

[0055] Embodiment 2: the present embodiment takes the low-grade Yunnan carbonate type high-silicon bauxite as the research object, and Al in the ore 2 o 3 The grade is 18.73%, SiO 2 The content of CaO and MgO in the ore is 8.34%, and the ratio of aluminum to silicon is 2.24; the content of CaO in the ore is 7.63%, and the content of MgO is 8.42%. CaO and MgO mainly exist in the form of calcite and dolomite. Calcite etc.

[0056] Such as figure 1 and 4 Shown, a kind of beneficiation method of carbonate type high-silicon bauxite, concrete steps are as follows:

[0057] (1) Crushing, screening, grinding, and grading the raw ore to -0.074 mm accounted for 85% to obtain fine-grained bauxite ore samples;

[0058] (2) Add 200g / t of sodium oleate, 600g / t of water glass, and 60g / t of No. 2 oil to the fine-grained bauxite sample in step (1), and roughen for 4 minutes to obtain the roughened concentrate and Rough beneficiation; wherein the mass percentage of alumina in the rough be...

Embodiment 3

[0076] Embodiment 3: the present embodiment takes high-grade Guangxi carbonate type high-silicon bauxite as the research object, and Al in the ore 2 o 3 The grade is 27.64%, SiO 2 The content is 8.67%, and the aluminum-silicon ratio is 3.19; the gangue minerals are mainly quartz, dolomite, kaolinite and calcite.

[0077] Such as figure 1 and 6 Shown, a kind of beneficiation method of carbonate type high-silicon bauxite, concrete steps are as follows:

[0078] (1) Crushing, screening, grinding, and grading the raw ore to -0.074 mm accounts for 90% to obtain fine-grained bauxite ore samples;

[0079] (2) Add sodium oleate 300g / t, water glass 800g / t, and No. 2 oil 80g / t to the fine-grained bauxite ore sample in step (1) in sequence, and roughen for 4 minutes to obtain the roughened concentrate and rough concentrate; wherein the mass percentage of alumina in the rough concentrate is 45.57%, the mass percentage of silica is 5.82%, and the mass ratio of alumina to silica is 7.8...

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Abstract

The invention relates to a carbonate type high-silicon bauxite beneficiation method, and belongs to the technical field of mineral processing. The method mainly comprises the following steps that firstly, carbonate type high-silicon bauxite (raw ore) is smashed, screened, ground and graded; then the graded bauxite is sorted through a roughing-scavenging-selection flotation method, and the bauxite rough concentrate and middlings with different qualities are obtained; the bauxite rough concentrate and middling products obtained through flotation are matched in proportion to obtain mixing ore, the mixing ore and diluted hydrochloric acid are mixed and react, and solid-liquid separation is carried out to obtain pickle liquor and acid leaching slag; and the acid leaching slag is washed and dried to obtain leached concentrate, the leached concentrate and the middlings with the mass percent of aluminum oxide larger than 50% are combined to obtain the qualified bauxite with high alumina-silica ratio and high Al2O3 grade. As for the carbonate type high-silicon bauxite, the new process including two sections including flotation desilication and diluted hydrochloric acid leaching is provided, and the better sorting index can be obtained compared with a traditional process.

Description

technical field [0001] The invention relates to a beneficiation method for carbonate-type high-silicon bauxite, and belongs to the technical field of mineral processing. Background technique [0002] Bauxite refers to the ores that can be used in industry, with gibbsite, boehmite or diaspore as the main minerals. It is a strategic mineral raw material with wide application. At present, the bauxite raw ore mined at home and abroad is due to its SiO 2 , CaO and MgO and other impurities are high in content and need to be sorted before they can be used. The traditional bauxite sorting process generally uses forward flotation or reverse flotation to remove SiO 2 , CaO and MgO to improve the aluminum grade. For carbonate-type high-silicon bauxite, the floatability of carbonate-type gangue minerals is similar to that of bauxite. Therefore, the traditional single flotation process for carbonate-type high-silicon bauxite can only Reduce SiO 2 content to increase the ratio of alu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03D1/00
CPCB03B9/00B03D1/00
Inventor 曾剑武童雄陈禄政郑永明
Owner KUNMING UNIV OF SCI & TECH
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