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Autoclaved bricks with lignite germanium tailings as main raw material and preparation method thereof

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, saving production costs, and reducing energy consumption

Inactive Publication Date: 2016-06-15
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] Embodiment 1: The autoclaved brick with the tailings of germanium extracted from lignite as the main raw material is made from the following raw materials. Water 14.7wt%, additive sodium sulfate in an amount of 2wt% by weight of slaked lime.

[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 0.3g of additive sodium sulfate and continue stirring for 3 minutes;

[0024] (3) Aging the mixture obtained in step (2) for 1 hour and pressing it into ...

Embodiment 2

[0027] Embodiment 2: The autoclaved brick composition and the weight percentages of the autoclaved brick with lignite extracting germanium tailings as the main raw material are: 65wt% of pretreated lignite extracting germanium tailings, 10wt% of fly ash, 10wt% of slaked lime, 14.795wt% of water, Calcium sulfate added in an amount of 2.05wt% by weight of fly ash.

[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...

Embodiment 3

[0034] Example 3: The composition of the autoclaved brick with lignite germanium extraction tailings as the main raw material and its weight percentages are: pretreated lignite germanium extraction tailings 54.7wt%, fly ash 20wt%, slaked lime 12wt%, water 13.058wt% , The additive amount is 2.02wt% 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 the mixer for 4.5min, then add 13.058g of water an...

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Abstract

The invention discloses an autoclaved brick with lignite germanium extraction tailings as the main raw material and a preparation method thereof. The raw material components of the autoclaved brick are pretreated lignite germanium extraction tailings, fly ash, slaked lime, water, and additives ; After dry mixing the pretreated lignite germanium tailings, fly ash and slaked lime, adding water and additives and continuing to stir evenly, the resulting mixture is pressed into shape, rested, and then autoclaved under the condition of 1.05Mpa~1.25Mpa. , the process of natural cooling to prepare the autoclaved brick with lignite extracting germanium tailings as the main raw material; the process of the invention has low energy consumption, high tailings utilization rate and good product performance.

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 Patents(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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