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Floatation method of desulfurizing and desiliconizing diaspore type bauxite

A bauxite and desiliconization technology, applied in flotation, solid separation, etc., can solve the problems of large proportion, limited utilization of bauxite resources, high aluminum-silicon ratio ore and low-sulfur bauxite consumption, etc. , to achieve the effect of improving the utilization rate of raw materials

Active Publication Date: 2005-01-12
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

Guizhou is the main production area of ​​bauxite in the country, and the proportion of diaspore high-sulfur and high-silicon bauxite is large. The ore belt has an ore aluminum-silicon ratio of 5.8-9.0 and sulfur 0.8-1.03%. It is a medium-large ore belt. With the continuous development of production, and the mineral resources are non-renewable resources. The ore consumption is very fast. At present, only a single desulfurization or desiliconization of bauxite flotation technology is reported at home and abroad. The use of bauxite resources is limited

Method used

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Embodiment Construction

[0008] Embodiment of the present invention: use the Guizhou bauxite of raw ore aluminum-silicon ratio A / S=6.9, concrete process is as follows:

[0009] a) Reverse flotation desulfurization: use a ball mill to grind diaspore bauxite, the fineness of the ground product is -74μm, accounting for about 90%, the grinding concentration is 56%, the overflow concentration of the classifier is 37%, and the grinding Mineral products directly enter into flotation. The pulp concentration of flotation operation is 14-37%. The foam product continues to be flotation (ie desulfurization sweeping), and the bottom product of the desulfurization sweeping operation (ie middle ore) returns to the desulfurization roughing. The entire flotation process is carried out at room temperature, and the pH of the pulp is maintained at pH9.0-10.0; the collector for reverse flotation is hydrocarbyl dithiocarbonate (Y-89), the general formula is ROCSSNa, and the dosage is 3333 g / ton Raw ore, Y-89 ionizes anion...

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Abstract

A floatation technology for desulfurizing and desiliconizing the diasporite-type bauxite features that the reverse floatation to desulfurize and the forward floatation for desiliconizing are sequentially performed to increase the utilization rate of bauxite and the recovery rate of Al2O3.

Description

Technical field: [0001] The invention relates to a method for desulfurizing and desiliconizing bauxite. technical background: [0002] Bauxite is the main raw material for the aluminum smelting industry, and is also an important raw material for the production of refractory materials, advanced abrasives, high-alumina cement, ceramics, chemicals, and medicine. The ore types of bauxite can be roughly divided into three basic types according to the useful mineral composition: gibbsite type, boehmite type and diaspore type. At present, most of the foreign bauxite is boehmite, so the flotation research of boehmite and boehmite is mostly carried out abroad, and gibbsite is mainly used to produce alumina. Typical production process According to the Bayer method, most of the domestic bauxite belongs to the diaspore type bauxite, and the content of sulfur and silicon is high, so it is not suitable for the production of alumina by the Bayer method, and more than 90% of the alumina is...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/002B03D1/004
Inventor 张覃刘华光唐云吴光耀邱跃琴代方军张启厚王军张杰
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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