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Preparation method of homogeneous bauxite applicable to smelting of brown fused alumina

A technology of bauxite and brown corundum, applied in the field of preparation of homogeneous materials for bauxite brown corundum smelting, which can solve problems such as waste, high-grade ore in short supply, and surface ore that cannot be utilized, so as to achieve stable quality and improve workers' production labor Environment, the effect of enhancing application value

Inactive Publication Date: 2012-07-18
贵州黄平富城实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing homogeneous bauxite suitable for brown corundum smelting, so as to overcome the shortage of high-grade ore in the prior art, the inability to utilize a large amount of fine ore and surface ore, and the waste of very serious shortage

Method used

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Embodiment Construction

[0020] Embodiments of the present invention: the preparation method of the homogeneous bauxite suitable for brown corundum smelting of the present invention comprises the following steps:

[0021] First, the Al 2 o 3 65~69% and Al 2 o 3 70-72% of the bauxite is crushed to ≤30mm respectively, put into the rotary kiln for roasting at 1000℃ for 2 hours, and then crushed to ≤0.074mm after natural cooling;

[0022] Second, the above-mentioned crushed Al 2 o 3 65-69% of the bauxite is sieved to take the part of 240 mesh-0.074mm as A material for use (the weight of this section of material accounts for 85-90% of the total material, and its SiO 2 The content accounts for 15-25% of the total content). The weight of ≤240 mesh accounts for about 10-15% of the total material (this section of material SiO 2 content accounts for 75-85% of the total content) for other purposes. (For example: making oil fracturing proppant ceramsite, etc.).

[0023] Third, the above-mentioned crushed...

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Abstract

The invention discloses a preparation method of homogeneous bauxite applicable to smelting of brown fused alumina. The preparation method is characterized by comprising the steps as follows: firstly, bauxite containing 65% to 69% of Al2O3 and bauxite containing 70% to 72% of Al2O3 are crushed to be less than or equal to 30 mm, roasted to 1000 DEG C in a rotary kiln for 2 hours, cooled and then crushed to be less than or equal to 0.074 mm; secondly, the crushed bauxite containing 65% to 69% of Al2O3 is screened, and the part which is 240 mesh to 0.074 mm is taken as material A for standby; thirdly, the crushed bauxite containing 70% to 72% of Al2O3 is screened, and the part which is 325 mesh to 0.074 mm is taken as material B for standby; fourthly, the materials A and B are intensively mixed and uniformly stirred according to the proportion of 1:1, and then are placed in a flour milling machine to produce the homogeneous bauxite which is less than or equal to 200 mesh; and fifthly, the homogeneous bauxite is shaped, roasted to 1150 DEG C in a tunnel kiln for 3 hours, cooled, and crushed to 30mm to 1mm to obtain a raw material finished product.

Description

technical field [0001] The invention relates to a method for preparing a homogeneous material suitable for smelting bauxite brown corundum. Background technique [0002] More than 70% of China's bauxite resources are medium and low-grade ores, and a small part are high-grade ores. For many years, the aluminum industry, refractory materials, high alumina cement, oil fracturing proppant, and brown corundum smelting have mostly used high-grade bauxite, resulting in a shortage of high-grade ore, and a large amount of fine ore, surface ore, and low- and medium-grade ore have been idled. In the upstream bauxite smelting ore calcination industry of brown corundum smelting, shaft kilns are still widely used to calcine bauxite lump ore, resulting in high energy consumption and low yield of finished products. From the mining of bauxite to the calcination of mature ore, a large amount of fine ore and surface ore cannot be utilized, and the waste is very serious. How to take appropriat...

Claims

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Application Information

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IPC IPC(8): C01F7/02
Inventor 龚亚云李丹阳
Owner 贵州黄平富城实业有限公司
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