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Sintered ceramsite adopting tailings generated during germanium extraction of lignite as main raw material and preparation method of sintered ceramsite

A main raw material, lignite technology, applied in the field of building materials, can solve problems such as land occupation and environmental pollution, and achieve the effects of suppressing strength decline, good product performance, and good compressive strength

Inactive Publication Date: 2015-04-15
LINCANG TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the germanium extraction tailings from lignite are mainly stacked, which is likely to cause problems such as land occupation and environmental pollution. Considering that its main component is Si, and it has good activity after roasting, it can be used as the basic material for the preparation of ceramsite.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The sintered ceramsite with lignite germanium extraction tailings as the main raw material is made from the following raw materials, and the raw materials and weight percentages are 80wt% lignite germanium extraction tailings, kaolin 10wt%, and water 10wt%.

[0023] The preparation steps of sintering ceramsite with germanium tailing slag extracted from lignite are:

[0024] (1) Pretreatment of raw materials: drying lignite germanium extraction tailings and kaolin to a moisture content of 2wt%, and then crushing to a particle size of less than 0.074mm, and raw materials with a particle size of less than 0.074mm>80%;

[0025] (2) Stirring and mixing: put 80kg lignite germanium extraction tailings and 10kg kaolin into a mixer and mix for 10 minutes, then add 10kg of water, stir again for 15 minutes, and mix evenly to obtain a mixture;

[0026] (3) Molding: Put the mixture in a disc pelletizer to make pellets to obtain a ceramsite green body. The particle siz...

Embodiment 2

[0031] Example 2: The sintered ceramsite with lignite germanium extraction tailings as the main raw material is made from the following raw materials, and the raw materials and weight percentages are 55wt% lignite germanium extraction tailings, 30wt% kaolin, and 15wt% water.

[0032] The preparation steps of sintering ceramsite with germanium tailing slag extracted from lignite are:

[0033] (1) Pretreatment of raw materials: drying lignite germanium extraction tailings and kaolin to a moisture content of 1wt%, and then crushing to a particle size of less than 0.074mm, and raw materials with a particle size of less than 0.074mm>80%;

[0034] (2) Stirring and mixing: put 55kg lignite germanium extraction tailings and 30kg kaolin into a mixer and mix for 15 minutes, then add 15kg of water, stir again for 10 minutes, and mix evenly to obtain a mixture;

[0035] (3) Molding: Put the mixture in a disc pelletizer to make pellets to obtain a ceramsite green body. The particle size of...

Embodiment 3

[0040] Example 3: The sintered ceramsite which uses lignite germanium extraction tailings as the main raw material is made from the following raw materials, and the raw materials and weight percentages are 70wt% lignite germanium extraction tailings, 25wt% kaolin, and 5wt% water.

[0041] The preparation steps of sintering ceramsite with germanium tailing slag extracted from lignite are:

[0042] (1) Pretreatment of raw materials: drying lignite germanium extraction tailings and kaolin to a moisture content of 1.5wt%, and then crushing to a particle size of less than 0.074mm, and raw materials with a particle size of less than 0.074mm>80%;

[0043] (2) Stirring and mixing: put 70kg lignite germanium extraction tailings and 25kg kaolin into a mixer and mix for 12 minutes, then add 5kg of water, stir again for 13 minutes, and mix evenly to obtain a mixture;

[0044] (3) Molding: Put the mixture in a disc pelletizer to make pellets to obtain a ceramsite green body. The particle ...

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PUM

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Abstract

The invention discloses a sintered ceramsite adopting tailings generated during germanium extraction of lignite as a main raw material and a preparation method of the sintered ceramsite. The sintered ceramsite comprises the components of tailings generated during germanium extraction of lignite, kaolin and water; the tailings are ground; kaolin and water are fed into the ground tailings; the mixture is stirred to be uniform; ageing is carried out for pelletizing; the finished balls are placed in a muffle furnace for preheating and calcining to obtain the sintered ceramsite. The preparation is simple in technology, low in energy consumption, relative high in waste utilization, and good in product performance.

Description

technical field [0001] The invention relates to a sintered ceramsite and a preparation method thereof, in particular to a sintered ceramsite whose main raw material is germanium extraction tailings from lignite and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] In recent years, ceramsite has been widely used in building materials, refractory insulation materials and other departments due to its light weight, low price and good heat insulation performance. In particular, sintered ceramsite has been widely used because of its simple process and high strength. At present, the main raw materials for making ceramsite are aluminosilicate minerals or industrial solid waste. In research at home and abroad, shale or fly ash are mainly used as raw materials to prepare ceramsite (Gao Yuexu, a kind of fly ash ceramsite [P]CN101182186A, 2007), and excessive mining of shale will have an impact on the environment, and po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/138
CPCY02P40/60
Inventor 陈佳那金华陈文华肖春宏徐小会聂文林马从瑛曾赤洁杨丕华
Owner LINCANG TEACHERS COLLEGE
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