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Silicon removal method of low-grade bauxite

A bauxite and desiliconization technology, applied in the direction of alumina/hydroxide, etc., can solve the problems of poor comprehensive benefits, complex production process, high production cost, etc., to improve the ratio of aluminum to silicon, fully desiliconize the reaction, increase contact the effect of time

Inactive Publication Date: 2015-12-30
洛阳国兴矿业有限公司
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Problems solved by technology

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

Method used

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  • Silicon removal method of low-grade bauxite
  • Silicon removal method of low-grade bauxite
  • Silicon removal method of low-grade bauxite

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0023] see figure 1 , the invention provides a method for desiliconization of low-grade bauxite, comprising the following steps:

[0024] Acid leaching and iron removal: reacting hydrochloric acid in low-grade bauxite particles to form acid leaching slurry; filtering the acid leaching slurry to obtain leaching solution and iron-removing filter residue; drying the iron-removing filter residue to obtain iron-removing bauxite. Specifically, add concentrated hydrochloric acid to the low-grade bauxite particles according to the ratio of 1-1.4mL concentrated hydrochloric acid / 1g low-grade bauxite, and react at 40-80°C for 20-40min to form the acid leaching slurry, wherein the volume fraction of the concentrated hydrochloric acid is 36% to 38%; adding water to dilute the acid leaching slurry to obtain a dilute acid leaching slurry; using a filt...

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Abstract

The invention provides a silicon removal method of low-grade bauxite. The method comprises the following steps: removing iron in an acid pickling manner; adding hydrochloric acid into low-grade bauxite particles, and reacting to form acid pickling serous fluid; filtering the acid pickling serous fluid to obtain extract liquid and iron-removed filter slag; drying the iron-removed filter slag to obtain iron-removed bauxite; stirring and kneading to form balls: crushing the iron-removed bauxite, mixing the crushed bauxite with ammonium fluoride solid to obtain a mixture, kneading the mixture to form particles to obtain a plurality of slag-mixed particles; roasting and silicon removing: roasting the plurality of slag-mixed particles at the temperature of 300 to 700 DEG C to remove silicon element in the slag-mixed particles, and obtaining aluminum fluoride solid residue. The method is an effective method for removing silicon from the low-grade bauxite, the aluminum-silicon ratio of the low-grade bauxite can be increased, and the subsequent and sufficient application of the low-grade bauxite is facilitated.

Description

technical field [0001] The invention relates to a treatment process for low-quality bauxite, in particular to a method for desiliconizing low-quality 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 i...

Claims

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Application Information

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IPC IPC(8): C01F7/02
Inventor 秦传钧张建设宁站昭张保民王二军肖郁良张斌魏俊峰
Owner 洛阳国兴矿业有限公司
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