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 tailings settlement, investment management of tailings reservoir infrastructure and safety aspects caused by desiliconization after adopting the ore washing process. A series of problems of bauxite dry desiliconization method

Method used

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Effect test

Embodiment 1

[0016] Taking Guangxi Pingguo bauxite as the test sample, this type of bauxite is accumulation type bauxite. Raw Al 2 o 3 46.13%, SiO 2 8.50%, the aluminum-silicon ratio is 5.43, the full 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 main minerals is shown in Table 2. The main useful minerals in this type of bauxite are diaspore and tertiary The specific process of dry desilication of diaspore is as follows:

[0017] The raw ore of Guangxi bauxite is preliminarily air-dried in a vibrating state to reduce the moisture content of the raw ore to 10-15%, and then the large ore after dehydration is selectively crushed to 1-100mm. The crushed ore passes through a vibrating screen with a screen hole size of 10mm. The ore on the screen is used as dry concentrate l, and its yield is 32.56%. The ash is evenly mixed under the action of mechanical stirring, and then the cyclone dust collector is used to re...

Embodiment 2

[0025] The "May 1" bauxite in Vietnam is used as the test sample, and this type of bauxite is lateritic bauxite. Raw Al 2 o 3 41.09%, SiO 2 6.75%, the aluminum-silicon ratio is 6.09, the chemical analysis results of the raw ore are shown in Table 4, 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, and the principle process adopted Flow chart is shown in Fig. 1, and the concrete process of its dry method desiliconization is as follows:

[0026] In Vietnam, the bauxite raw ore is air-dried under vibration to reduce the overall water content to 5%, and then the ore after dehydration is passed through a vibrating screen with a mesh size of 10mm, and the ore on the screen is used as dry concentrate 1, sieved The material below is classified by wind force according to the classification limit of 0.074mm, the coarse particles are regarded as dry concentrate 2, and the fine particles are regarde...

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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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