Cordierite material prepared by utilizing rare earth tailing and manufacturing method thereof

A technology for rare earth tailings and a manufacturing method, applied in the field of ceramic materials, can solve problems such as hidden dangers of safety and waste of resources, and achieve the effects of reducing pollution, lowering sintering temperature, and making full use of resources

Active Publication Date: 2013-11-13
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth tailings accumulate in tailings dams for many years, which not only causes a lot of waste of resources, but also poses great safety hazards, and also brings great pressure and difficulties to my country's vigorous development of circular economy and protection of the ecological environment.

Method used

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  • Cordierite material prepared by utilizing rare earth tailing and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. The cordierite material prepared by using rare earth tailings in this embodiment is composed of 55% rare earth tailings, 14% lightly burned magnesia, and 31% bauxite.

[0024] 2. The preparation method of the cordierite material in this example is as follows:

[0025] (1) adding each material into a ball mill for wet ball milling to obtain a slurry;

[0026] (2) After the slurry passes through a -250 mesh sieve, it is dried and pressed to obtain a green body;

[0027] (3) The green body is fired at a temperature of 1320°C, and the total firing time is 10 hours, of which the high temperature holding time is 30 minutes, and the product is obtained after firing.

Embodiment 2

[0029] 1. The cordierite material prepared by using rare earth tailings in this embodiment is composed of 53% rare earth tailings, 14% lightly burned magnesia, and 33% bauxite.

[0030] 2. The preparation method of the cordierite material in this example is as follows:

[0031] (1) adding each material into a ball mill for wet ball milling to obtain a slurry;

[0032] (2) After the slurry passes through a -250 mesh sieve, it is dried and pressed to obtain a green body;

[0033] (3) The green body is fired at a temperature of 1350°C. The total firing time is 10 hours, and the high temperature holding time is 50 minutes. The product is obtained after firing.

Embodiment 3

[0035] 1. The cordierite material prepared by using rare earth tailings in this embodiment is composed of 45% rare earth tailings, 13% lightly burned magnesia, and 42% bauxite.

[0036] 2. The preparation method of the cordierite material in this example is as follows:

[0037] (1) adding each material into a ball mill for wet ball milling to obtain a slurry;

[0038] (2) After the slurry passes through a -250 mesh sieve, it is dried and pressed to obtain a green body;

[0039] (3) The green body is fired at a temperature of 1320°C, and the total firing time is 11 hours, of which the high temperature holding time is 40 minutes, and the product is obtained after firing.

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Abstract

The invention discloses a cordierite material prepared by utilizing a rare earth tailing. The cordierite material comprises the following components in percentage by weight: 40-55% of the rare earth tailing, 13-15% of light-burnt magnesite and 30-47% of bauxite. In addition, the invention also discloses a manufacturing method of the cordierite material. According to the cordierite material and the manufacturing method, the rare earth tailing is used as a main raw material; the cordierite low-expansion material is obtained by matching with a low-cost magnesian raw material light-burnt magnesite and the bauxite; the cost of the raw materials is greatly decreased while resources are adequately utilized and the environmental pollution is reduced; the maturing temperature of the cordierite material is reduced; the energy saving and the emission reduction are favorable; and the cordierite material and the manufacturing method have an enormous promotion action on the technique and the industrial development of the cordierite material.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a cordierite low-expansion material and a manufacturing method thereof. Background technique [0002] Cordierite has a low coefficient of thermal expansion and high heat resistance. As a low-expansion material, it has been widely used in the production of lightweight bricks for heat exchangers and honeycomb ceramics. At present, the preparation of cordierite low-expansion materials in the prior art usually adopts the following two methods: [0003] One is the molten glass crystallization method, which uses talc, kaolin, quartz, alumina, etc. as raw materials and synthesizes them at a melting temperature above 1600°C. The synthesis temperature of this method is very high, and it is necessary to synthesize cordierite first, and then use the synthesized cordierite to prepare low-expansion materials, and the process is relatively complicated. [0004] The other is the sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/185C04B35/622
Inventor 周健儿刘阳包启富李小龙
Owner JINGDEZHEN CERAMIC UNIV
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