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Non-fired ceramsite with lignite germanium extraction tailings as main raw material and preparation method thereof

A technology of main raw materials and tailings, applied in the field of unburned ceramsite and its preparation, can solve problems such as land occupation and environmental pollution, and achieve the effects of low energy consumption, environmental friendliness and production cost saving

Inactive Publication Date: 2016-05-18
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

[0020] Embodiment 1: the non-fired ceramsite with the tailings of germanium extracted from lignite as the main raw material is made from the following raw materials, and the raw materials and weight percentages are: 50wt% of tails of germanium extracted from pretreated lignite, 15wt% of cement, 20wt% of quicklime, water 14.7wt%, and the addition amount is the admixture sodium sulfate of 2.0wt% of cement weight.

[0021] The preparation steps of unburned ceramsite for extracting germanium tailing slag from lignite are:

[0022] (1) Dry the lignite germanium extraction tailings first until the moisture content is less than 1wt%, and then crush until the tailings with a particle size of less than 0.074mm>80%, that is, the pretreated germanium extraction tailings are obtained;

[0023] (2) Pour 50kg of pretreated lignite germanium tailings, 20kg of quicklime, and 15kg of cement into the mixer for dry mixing for 4 minutes, then add 14.7kg of water and 0.3kg of admixture sodium sulf...

Embodiment 2

[0027] Embodiment 2: the non-fired ceramsite with the tailings of germanium extracted from lignite as the main raw material is made from the following raw materials. 14.794wt%, the addition amount is the admixture triethanolamine of cement weight 2.06wt%.

[0028] The preparation steps of unburned ceramsite for extracting germanium tailing slag from lignite are:

[0029] (1) Dry the lignite germanium extraction tailings first until the moisture content is less than 1wt%, and then crush until the tailings with a particle size of less than 0.074mm>80%, that is, the pretreated germanium extraction tailings are obtained;

[0030] (2) Pour 60kg of pretreated lignite germanium tailings, 15kg of quicklime, and 10kg of cement into a mixer for 5 minutes of dry mixing, then add 14.794kg of water and 0.206kg of admixture triethanolamine and continue stirring for 4 minutes;

[0031] (3) Aging the mixture obtained in step (2) for 2 hours and then placing it in a disc pelletizer to make pe...

Embodiment 3

[0034] Embodiment 3: the non-fired ceramsite with the tailings of germanium extracted from lignite as the main raw material is made from the following raw materials. 12.758wt%, an admixture of 2.02wt% by weight of cement (made by mixing triethanolamine and sodium sulfate at a mass ratio of 1:1).

[0035] The preparation steps of unburned ceramsite for extracting germanium tailing slag from lignite are:

[0036] (1) Dry the lignite germanium extraction tailings first until the moisture content is less than 1wt%, and then crush until the tailings with a particle size of less than 0.074mm>80%, that is, the pretreated germanium extraction tailings are obtained;

[0037] (2) Pour 65kg of pretreated lignite germanium tailings, 10kg of quicklime, and 12kg of cement into the mixer for 4.5 minutes of dry mixing, then add 12.758kg of water and 0.242kg of admixture and continue stirring for 5 minutes;

[0038] (3) Aging the mixture obtained in step (2) for 1.5 hours and then placing it ...

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Abstract

The invention discloses an unfired ceramsite by using lignite extracted germanium tailings as a main raw material and a preparation method of the unfired ceramsite. The raw material components of the unfired ceramsite comprise pretreated lignite extracted germanium tailings, cement, unslaked lime, water and additive. The method comprises the following steps: drily mixing the pretreated lignite extracted germanium tailings, cement and unslaked lime, adding water and additive to uniformly stir, ageing the mixture and pelletizing, standing, steaming and pressing curing at 0.75-1.05Mpa to prepare the unfired ceramsite by using lignite extracted germanium tailings as the main raw material in the natural cooling process. The energy consumption is small, the utilization rate of the tailing is high, and the product property is good.

Description

technical field [0001] The invention belongs to the technical field of non-fired ceramsite, and in particular relates to a kind of non-fired ceramsite whose main raw material is germanium extraction tailings from lignite and a preparation method thereof. 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 thermal insulation properties. In particular, non-fired ceramsite has received widespread attention because of its low energy consumption and simple process. . At present, the main raw material for making ceramsite is clay, shale or fly ash is used as raw material to prepare ceramsite and the amount of cement in the traditional process is relatively high, such as "shale unburned ceramsite" (CN201268430Y, 2008), using lignite to extract germanium tail There is no report on the preparation of ceramsite with slag as raw material. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B18/14
CPCY02W30/91
Inventor 陈佳那金华陈文华杨波王朝文王丽美甘文斌魏正子
Owner LINCANG TEACHERS COLLEGE
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