Process of removing silicon from low-grade bauxite by adopting chemical floatation method

A chemical flotation, bauxite technology, applied in the direction of alumina/hydroxide, etc., can solve the problems of high production cost, complex production process, poor comprehensive benefit, etc., achieve simple method, easy operation, and improve the ratio of aluminum to silicon Effect

Inactive Publication Date: 2015-12-30
洛阳国兴矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have complex production processes, high production costs, and poor overall benefits. As high-grade bauxite resources become less and less, these problems become more obvious

Method used

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  • Process of removing silicon from low-grade bauxite by adopting chemical floatation method
  • Process of removing silicon from low-grade bauxite by adopting chemical floatation method
  • Process of removing silicon from low-grade bauxite by adopting chemical floatation method

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Embodiment 1

[0019] see figure 1 , the first embodiment of the present invention provides a process for removing silicon from low-grade bauxite by chemical flotation, comprising the following steps: providing low-grade bauxite raw ore as shown in Table 1, and placing it in Crushing in a crusher, and then placing the crushed low-grade bauxite in a grinder for grinding to obtain a particle size of 100 mesh low-grade bauxite particles; take 10.00 g of the 100 mesh low-grade bauxite particles In the fluidized bed reactor, hydrogen fluoride gas was passed into the fluidized bed reactor at 110°C, and reacted for 30 minutes to obtain a desiliconized solid residue; wash and filter the desiliconized solid residue with 80°C water to obtain 6.969 g high-grade bauxite products. X-ray fluorescence analysis method is used to analyze and know: SiO in high-grade bauxite products 2 content of 0.18%, the removal rate of silicon is 99.61%, the content of fluorine is 42.89%, Al 2 o 3 The content is 52.33%...

Embodiment 2

[0023] The second embodiment of the present invention provides a process for removing silicon from low-grade bauxite by chemical flotation, which differs from the first embodiment in that:

[0024] The reaction temperature of the low-grade bauxite particles and hydrogen fluoride gas is 70°C, react for 15 minutes to obtain a desiliconized solid residue, and sequentially wash and dry the desiliconized solid residue with 85°C water to obtain 5.400g of high-grade bauxite product . X-ray fluorescence analysis method is used to analyze and know: SiO in high-grade bauxite products 2 content of 1.41%, the removal rate of silicon is 97.65%, the content of fluorine is 23.41%, Al 2 o 3 The content is 68.53%.

Embodiment 3

[0026] The third embodiment of the present invention provides a process for removing silicon from low-grade bauxite by chemical flotation, which differs from the first embodiment in that:

[0027] The reaction temperature of the low-grade bauxite particles and hydrogen fluoride gas was 20°C, and the desiliconization solid residue was obtained after reacting for 20 minutes. The desiliconization solid residue was successively washed with water at 90°C and dried to obtain 5.410 g of high-grade bauxite product. X-ray fluorescence analysis method is used to analyze and know: SiO in high-grade bauxite products 2 content of 5.19%, the removal rate of silicon is 91.33%, the content of fluorine is 19.80%, Al 2 o 3 The content is 65.20%.

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Abstract

The invention provides a process of removing silicon from low-grade bauxite by adopting a chemical floatation method. The process comprises the following steps: placing 50-mesh to 100-mesh low-grade bauxite particles and hydrogen fluoride gas into a fluidized bed reactor, facilitating a reaction of 10 to 30 minutes at the room temperature of 110 DEG C to obtain silicon-removed solid residue; washing and filtering the silicon-removed solid residue by using clear water to obtain the high-grade bauxite. The method is an effective process of removing the silicon from the low-grade bauxite, can improve the aluminum-silicon ratio of the low-grade bauxite and facilitate the subsequent and sufficient application of the low-grade bauxite.

Description

technical field [0001] The invention relates to a processing method for low-grade bauxite, in particular to a desiliconization process for low-grade bauxite. Background technique [0002] Bauxite is an aluminium-containing mineral with a large chemical composition and a very complex composition. The main chemical composition is Al 2 o 3 , SiO 2 , Fe 2 o 3 、TiO 2 , and contains a small amount of K 2 O, MgO, CaO, S, Ga, V, Cr, P and other impurities. With the rapid and sustainable development of the national economy, the aluminum industry is also developing rapidly, which satisfies the needs of national economic construction and social development so well, but it also brings the problem of massive consumption of resources and energy. In particular, the lack of bauxite resources has become a bottleneck restricting the sustainable development of my country's aluminum industry. According to statistics, from 2001 to 2007, the grade of bauxite used for alumina production in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 宁站昭张保民张建设秦传钧王二军张斌肖郁良魏俊峰
Owner 洛阳国兴矿业有限公司
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