Autoclaved brick adopting germanium-extracted lignite tailings as main raw material and preparation method of autoclaved brick

A main raw material, autoclaved brick technology, applied in the field of autoclaved bricks and its preparation, can solve the problems of unreported research on autoclaved bricks, and achieve the effects of broadening raw material sources, low energy consumption, and excellent durability

Inactive Publication Date: 2014-08-06
LINCANG TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: using lignite to extract germanium tailings to prepare sintered ceramsite and non-fired ceramsite, but the study of using lignite to extract germanium tailings as raw materials to prepare autoclaved bricks has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The autoclaved brick 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: 50wt% of pretreated lignite germanium extraction tailings, 20wt% of fly ash, 15wt% of slaked lime, and 14.7wt% of water , The addition amount is the additive sodium sulfate of slaked lime weight 2wt%.

[0021] The preparation steps of the autoclaved brick with germanium tailings extracted from lignite are as follows:

[0022] (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%;

[0023] (2) Pour 50g of pretreated lignite germanium tailings, 20g of fly ash, and 15g of hydrated lime into the mixer for 4 minutes, then add 14.7g of water and 0....

Embodiment 2

[0027] Example 2: The autoclaved brick composition and the weight percentage of the autoclaved brick with lignite germanium extraction tailings as the main raw material are: pretreated lignite germanium extraction tailings 65wt%, fly ash 10wt%, slaked lime 10wt%, water 14.795wt%, and the addition amount is Fly ash weight 2.05 wt% calcium sulfate.

[0028] The preparation steps of the above-mentioned brown coal extracting germanium tailings autoclaved brick are as follows:

[0029] (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%;

[0030] (2) Pour 65g of pretreated lignite germanium tailings, 10g of fly ash, and 10g of hydrated lime into the mixer for 5 minutes, then add 14.795g of water and 0.205g of additive calcium sulfate and c...

Embodiment 3

[0034] Example 3 : The composition of the autoclaved brick with the tailings of germanium extracted from lignite as the main raw material and its weight percentage are: 54.7wt% of the tails of germanium extracted from pretreated lignite, 20wt% of fly ash, 12wt% of slaked lime, 13.058wt% of water, and the addition amount The additive is 2.02 wt% of the weight of fly ash (calcium sulfate, sodium sulfate and calcium oxide are mixed at a mass ratio of 1:1:1).

[0035] The preparation steps of the autoclaved brick with germanium tailings extracted from lignite are:

[0036] (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%;

[0037] (2) Pour 54.7g of germanium tailings from pretreated lignite, 20g of fly ash, and 12g of slaked lime into ...

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Abstract

The invention discloses an autoclaved brick adopting germanium-extracted lignite tailings as a main raw material and a preparation method of the autoclaved brick. The autoclaved brick comprises the following constituents: pre-treated germanium-extracted lignite tailings, fly ash, slaked lime, water and an additive. The preparation method comprises the following steps: mixing the pre-treated germanium-extracted lignite tailings, the fly ash and the slaked lime; adding water and the additive; continuing to stir till the mixture is uniform; pressing the mixture for forming; standing; conducing autoclaved curing under the condition of 1.05-1.25 Mpa; naturally cooling to obtain the autoclaved brick adopting the germanium-extracted lignite tailings as the main raw material. The autoclaved brick and the preparation method thereof have the benefits that the energy consumption of the process is small, the utilization rate of the tailings is higher, and the product performance is better.

Description

technical field [0001] The invention belongs to the technical field of autoclaved bricks, and in particular relates to an autoclaved brick whose main raw material is germanium extraction tailings from lignite and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of my country's construction industry, building bricks have become the most used building materials due to their good compressive strength, and autoclaved bricks are becoming more and more popular because of their simple process, low cost and low energy consumption. more widely used. In research at home and abroad, fly ash is mainly used as raw material to prepare autoclaved bricks, and cement is usually added (Yuan Mingliang, Li Kang, Lai Yingming, etc. Fly ash autoclaved bricks and their preparation methods [P] CN103193441A, 2013 ), however, the price of fly ash as a new building material has increased year by year in recent years, and the price of cement a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B18/12C04B18/08
CPCY02W30/91
Inventor 陈佳那金华陈文华李文华张应红高建华
Owner LINCANG TEACHERS COLLEGE
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