Method for preparing mullite multiphase ceramic by low-temperature sintering of bauxite tailings

A technology of bauxite tailings and composite ceramics, which is applied in the fields of high-value tailings utilization and ceramic preparation, and can solve problems such as polluting the environment and difficulty in high-value utilization

Inactive Publication Date: 2021-06-08
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for preparing mullite multiphase ceramics by low-temperature sintering of

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0012] Raw materials: bauxite tailings are industrial solid waste, the main components are 44.5% alumina content, 35.2% silica content, 10.4% iron oxide content, 4.1% potassium oxide content, 2.8% titanium dioxide content, and a small amount of oxide Calcium, magnesium oxide and other impurities.

[0013] The main components of lithium china stone are 65% silica, 20% alumina, 2% lithium oxide, 8% potassium oxide and calcium oxide, and less than 5% other impurities.

[0014] The main components of bauxite clinker are 65% alumina, 28% silica, 4% titanium dioxide and iron oxide, and no more than 3% other impurities.

[0015] The above three raw materials are batched according to mass ratio, wherein bauxite tailings account for 30%, lithium china stone accounts for 35%, and bauxite clinker accounts for 45.5%. According to the ingredients: grinding balls: water = 1:1.5:2, weighed and put into the ball mill jar, wet milled for 3 hours, dried at 90°C for 48 hours, put into the mold ...

Embodiment 2

[0018] Raw materials: bauxite tailings are industrial solid waste, the main components are 44.5% alumina content, 35.2% silica content, 10.4% iron oxide content, 4.1% potassium oxide content, 2.8% titanium dioxide content, and a small amount of oxide Calcium, magnesium oxide and other impurities.

[0019] The main components of lithium china stone are 65% silica, 20% alumina, 2% lithium oxide, 8% potassium oxide and calcium oxide, and less than 5% other impurities.

[0020] The main components of bauxite clinker are 65% alumina, 28% silica, 4% titanium dioxide and iron oxide, and no more than 3% other impurities.

[0021] The above-mentioned three kinds of raw materials are batched according to mass ratio, wherein bauxite tailings account for 50%, lithium china stone accounts for 17.5%, and bauxite clinker accounts for 32.5%. According to the ingredients: grinding balls: water = 1:1.5:2, weighed and put into the ball mill jar, wet milled for 3 hours, dried at 90°C for 48 hour...

Embodiment 3

[0024] Raw materials: bauxite tailings are industrial solid waste, the main components are 44.5% alumina content, 35.2% silica content, 10.4% iron oxide content, 4.1% potassium oxide content, 2.8% titanium dioxide content, and a small amount of oxide Calcium, magnesium oxide and other impurities.

[0025] The main components of lithium china stone are 65% silica, 20% alumina, 2% lithium oxide, 8% potassium oxide and calcium oxide, and less than 5% other impurities.

[0026] The main components of bauxite clinker are 65% alumina, 28% silica, 4% titanium dioxide and iron oxide, and no more than 3% other impurities.

[0027] The above-mentioned three kinds of raw materials are batched according to mass ratio, wherein bauxite tailings account for 70%, lithium china stone accounts for 10.5%, and bauxite clinker accounts for 19.5%. According to the ingredients: grinding balls: water = 1:1.5:2, weighed and put into the ball milling tank, after wet grinding for 3 hours, dry at 90°C f...

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Abstract

The invention discloses a method for preparing mullite multiphase ceramic by low-temperature sintering of bauxite tailings, and belongs to the technical field of high-value utilization of the bauxite tailings and ceramic preparation. According to the invention, bauxite tailings, bauxite clinker and lithium chinastone are adopted as main raw materials, and the mullite multiphase ceramic is prepared through the processes of batching, ball milling, molding and low-temperature sintering. The mullite multiphase ceramic material prepared by low-temperature sintering of the bauxite tailings has the characteristics of high compressive strength, small linear shrinkage rate, high volume density and simple preparation process, and can be used in industries such as high-value utilization of the bauxite tailings and ceramics. The required raw materials are easy to obtain, the preparation process is simple, the utilization amount of the bauxite tailings is high, the problems of massive accumulation of the bauxite tailings and pollution and damage to the environment can be solved, and waste is turned into wealth; and by adding the bauxite tailings, the sintering temperature of the mullite multiphase ceramic can be reduced, the cost and the energy consumption are low, and high-value utilization of the bauxite tailings is realized.

Description

technical field [0001] The invention relates to the technical fields of high-value utilization of tailings and preparation of ceramics, in particular to a method for preparing mullite multiphase ceramics by low-temperature sintering of bauxite tailings. Background technique [0002] Bauxite is the best raw material for the production of metal aluminum and an important raw material for the manufacture of abrasives and high-alumina refractory materials. my country is rich in bauxite resources, ranking fourth in the world, but the quality of bauxite in my country is poor and suitable for open-pit There are not many bauxites mined, the working geological conditions of the deposits are complicated, the raw ore processing volume is large, and the tailings yield is close to 50%. With the increase in the amount of bauxite beneficiation, the stockpiles of tailings are also increasing. For the treatment of tailings, local backfilling and building materials are usually used, and the am...

Claims

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Application Information

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IPC IPC(8): C04B35/185C04B35/622C04B35/64
CPCC04B35/185C04B35/62204C04B35/64C04B2235/3217C04B2235/6562C04B2235/6567C04B2235/36C04B2235/96C04B2235/9615C04B2235/77
Inventor 陈新义闵鑫房明浩王淇黄朝晖吴小文刘艳改
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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