Desiliconizing method for bauxite by dry method

A bauxite, dry method technology, applied in the field of dry desiliconization of two types of laterite type and accumulation type bauxite, can solve the problems of large water consumption, tailings settlement difficulties, etc., and achieve significant economic and social benefits, Achieve sustainable development, stable and reliable process

Inactive Publication Date: 2008-02-13
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and provide a method that can effectively solve the problems of large water consumption, difficulty in tailing

Method used

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Examples

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Example Embodiment

[0015] Example 1

[0016] Taking Guangxi Pingguo bauxite as the test sample, this type of bauxite is an accumulation type bauxite. Raw ore Al 2 O 3 46.13%, SiO 2 8.50%, the ratio of aluminum to silicon is 5.43, the chemical analysis results of the raw ore are shown in Table 1, the water content of the raw ore is 20.99%, and the content of the main minerals is shown in Table 2. The main useful minerals in this type of bauxite are diaspore and trihydrate. The specific process for dry desilication of diaspore is as follows:

[0017] The raw ore of Guangxi bauxite mine is preliminarily air-dried under vibration to reduce the moisture content of the raw ore to 10-15%, and then the bulk of the ore after loss of water is subjected to selective crushing operations to crush it to 1-100mm. The crushed ore passes through a vibrating sieve with a mesh size of 10mm. The ore on the sieve is used as a dry concentrate, with a yield of 32.56%. The material under the sieve is combined with 48.5% of...

Example Embodiment

[0024] Example 2

[0025] The “May 1st” bauxite deposit in Duonong, Vietnam is used as the test sample. This type of bauxite is laterite type bauxite. Raw ore Al 2 O 3 41.09%, SiO 2 6.75%, the ratio of aluminum to silicon is 6.09, the chemical analysis results of the raw ore are shown in Table 4, and the content of the main minerals in the raw ore sample is shown in Table 5. The main useful mineral in this type of bauxite is gibbsite. The principle process is adopted The flow chart is shown in Figure 1, and the specific process of dry desiliconization is as follows:

[0026] In Vietnam, the raw bauxite ore is air-dried under vibration to reduce the overall moisture content to 5%, and then the ore after loss of water is passed through a vibrating sieve with a mesh size of 10mm, and the ore on the sieve is used as dry concentrate 1, sieve The following materials are classified by wind according to the classification limit of 0.074mm. The coarse particles are used as dry concentrate ...

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Abstract

A dry method desiliconization of a bauxite especially relates to the desiliconization method of an lateritic bauxite and an accumulating bauxite. The present invention is characterized in that the desiliconization process is that after dried, the bauxite is broken up and screened and the material under the screen is classified by the wind power. The material on the screen and the coarse grains classified by the wind power are taken as a combined concentrate and the fine grains classified by the wind power are taken as a tailing. The present invention has a stable and reliable process flow and does not need new water, capable of reclaiming the fine grain-level concentrate of more than 0.02mm effectively without the waste water pollution. The tailing can be stored or used to reclaim a goaf directly and make the refractory material and concrete. The investment construction and management of the tailing warehouse and the influence on the circumjacent environmental safety can be avoided.

Description

technical field [0001] A method for dry desiliconization of bauxite, in particular to a method for dry desiliconization of two types of bauxite, laterite type and accumulation type. Background technique [0002] According to its properties, bauxite can be divided into three types: sedimentary type diaspore, accumulation type diaspore and laterite type gibbsite. From a global perspective, there are two types of bauxite with industrial significance: laterite type and sedimentary type. Lateritic bauxite is the most important type of bauxite deposit, accounting for about 92% of the total bauxite reserves, mainly composed of gibbsite, which is characterized by low silicon, high iron, and high aluminum Silicon ratio: Sedimentary bauxite accounts for about 8% of the total bauxite reserves, with low and medium grades, mainly diaspore. [0003] The types of bauxite deposits in my country mainly include sedimentary type, accumulation type and laterite type, with sedimentary type as ...

Claims

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Application Information

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IPC IPC(8): C01F7/02B07B9/00
Inventor 李旺兴陈湘清马俊伟
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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