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Aerated concrete block with germanium tailings extracted from lignite as main raw material and preparation method thereof

A technology for air-entrained concrete and main raw materials, applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc. Excellent performance

Inactive Publication Date: 2015-10-21
LINCANG TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, sintered ceramsite and non-fired ceramsite were prepared by using the tailings of germanium extracted from lignite, but the research on the preparation of aerated concrete by using the tails of germanium extracted from lignite has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: The aerated concrete block whose main raw material is germanium tailings extracted from lignite is made from the following raw materials, and the raw materials and weight percentages are: 50wt% of germanium tails extracted from pretreated lignite, 15wt% of cement, 15wt% of slaked lime, 15wt% of water, Sodium sulfate 2.25wt%, aluminum powder 2.75wt%.

[0024] The preparation steps of the lignite germanium tailings aerated concrete block are as follows:

[0025] (1) Dry lignite germanium extraction tailings first until the moisture content is less than 1wt%, and then crush to a particle size of <3mm to obtain pretreated lignite germanium extraction tailings; in the pretreatment tailings, the tailings with a particle size of less than 0.074mm Slag<20wt%;

[0026] (2) Pour 50kg of pretreated lignite germanium tailings, 15kg of cement, 15kg of slaked lime, and 2.25kg of sodium sulfate into a mixer for 4 minutes to obtain a mixture;

[0027] (3) Add 15 kg of ...

Embodiment 2

[0032] Example 2: The aerated concrete block whose main raw material is germanium tailings extracted from lignite is made from the following raw materials, and the raw materials and weight percentages are: 66wt% of germanium tails extracted from pretreated lignite, 10wt% of cement, 10wt% of slaked lime, 10wt% of water, Calcium sulfate 2.0wt%, calcium carbide 2.0wt%.

[0033] The preparation steps of the lignite germanium tailings aerated concrete block are as follows:

[0034] (1) Dry lignite germanium extraction tailings first until the moisture content is less than 1wt%, and then crush to a particle size of <3mm to obtain pretreated lignite germanium extraction tailings; in the pretreatment tailings, the tailings with a particle size of less than 0.074mm Slag<20wt%;

[0035] (2) Pour 66kg of pretreated lignite germanium tailings, 10kg of cement, 10kg of hydrated lime, and 2.0kg of calcium sulfate into a mixer for 5 minutes to obtain a mixture;

[0036] (3) Add 10 kg o...

Embodiment 3

[0041] Example 3 The aerated concrete block that this lignite extracts germanium tailings as the main raw material is made from the following raw materials, and each raw material and weight percentage are: pretreatment lignite extracts germanium tailings 55wt%, cement 15wt%, slaked lime 12.3wt%, water 13wt %, calcium oxide 2.2wt%, sodium peroxide 2.5wt%.

[0042] The preparation steps of the lignite germanium tailings aerated concrete block are as follows:

[0043](1) Dry lignite germanium extraction tailings first until the moisture content is less than 1wt%, and then crush to a particle size of <3mm to obtain pretreated lignite germanium extraction tailings; in the pretreatment tailings, the tailings with a particle size of less than 0.074mm Slag<20wt%;

[0044] (2) Pour 55kg of pretreated lignite germanium tailings, 15kg of cement, 12.3kg of slaked lime, and 2.2kg of calcium oxide into a mixer for 4.5 minutes to obtain a mixture;

[0045] (3) Add 13kg of 55°C water t...

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Abstract

The invention discloses an aerated concrete block using germanium-extracting tailings of brown coal as main raw materials and a preparation method thereof. The aerated concrete block is prepared from the following raw material components: germanium-extracting tailings of brown coal, cement, slaked lime, water, an additive and a foaming agent. The preparation method comprises the following steps: drying and mixing the germanium-extracting tailings of brown coal, cement, slaked lime and additive; adding warm water and continuously and uniformly stirring; adding the foaming agent and continuously stirring; injecting the obtained mixed material into a die; standing; then, performing autoclaved curing at 1.15-1.35MPa; naturally cooling to prepare the aerated concrete block by using the germanium-extracting tailings of brown coal as main raw materials. The aerated concrete block disclosed by the invention is less in energy consumption of the process, high in tailing utilization ratio and good in product performance.

Description

technical field [0001] The invention belongs to the technical field of aerated concrete, and in particular relates to an aerated concrete block whose main raw material is germanium tailings extracted from lignite and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of my country's construction industry, building materials have also been widely used, and there are also a large number of applications of new materials, and aerated concrete blocks, because of their light weight, high strength, and good insulation performance, are getting more and more attention. widely used. In research at home and abroad, fly ash is mainly used as raw material to prepare air-entrained concrete (Yin Mingqian, Xi Xinguo, Zhu Hua. A preparation method of vitrified microbead air-entrained concrete [P]CN103232261A, 2013), however, in recent years The price of fly ash as a building raw material is rising year by year. Therefore, using vario...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/00C04B18/04
CPCY02W30/91
Inventor 陈佳那金华陈文华杨元美王红
Owner LINCANG TEACHERS COLLEGE
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