Method for preparing high-performance autoclaved flyash-lime brick by static molding

An autoclaved fly ash brick, high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of high water absorption, large volume, easy to crack, etc., to save cultivated land, Excellent performance and the effect of saving non-metallic mineral resources

Active Publication Date: 2012-11-14
安徽建鑫新型墙材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fly ash autoclaved products with solid waste such as fly ash or tailings as the main raw material is one of the top ten demonstration projects for the comprehensive utilization of bulk solid waste specially supported and promoted by the country during the "12th Five-Year Plan" development. 1. However, the current fly ash brick products generally have technical problems such as poor quality, low strength, large shrinkage, high water absorption, easy to crack, and large capacity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 20wt% of fly ash, 28wt% of slag, 32wt% of silt, 5wt% of stone powder, 12wt% of activator, 3wt% of retarder, and 0.15wt% of dispersant were mixed, stirred and ground by PLC system to prepare a uniform The mixture has a particle size of 80 μm, 26.88%, and a moisture content of 8.5%. The prefabricated uniform mixture is transported to the hopper of the autoclaved brick automatic hydraulic machine through the PLC system, and the pressing time is 5s to 10s under the pressure of 20MPa. 64 to 128 pieces / min; the mixture is statically pressed to form the brick body, and the brick body is neatly placed on the trolley entering the autoclave with a palletizer, waiting to enter the autoclave for autoclave treatment; this process It does not need to be maintained or rested, and it is directly transported to the autoclave through the ferry car and the conveyor track; the autoclave temperature is 181°C, the pressure is 1.0MPa, the saturated vapor pressure in the autoclave is consta...

Embodiment 2

[0021] 20wt% of fly ash, 28wt% of slag, 30wt% of silt, 8wt% of stone powder, 12wt% of activator, 2wt% of retarder, and 0.15wt% of dispersant were mixed, stirred and ground by PLC system to prepare a uniform The mixture has a particle size of 80 μm, 27.54%, and a moisture content of 8.7%. The prefabricated uniform mixture is transported to the hopper of the autoclaved brick automatic hydraulic machine through the PLC system, and the pressing time is 5s to 10s under the pressure of 20MPa. 64 to 128 pieces / min; the mixture is statically pressed to form the brick body, and the brick body is neatly placed on the trolley entering the autoclave with a palletizer, waiting to enter the autoclave for autoclave treatment; this process It does not need to be maintained or rested, and it is directly transported to the autoclave through the ferry car and the conveyor track; the autoclave temperature is 192°C, the pressure is 1.25MPa, the saturated vapor pressure in the autoclave is const...

Embodiment 3

[0023] 20wt% of fly ash, 28wt% of slag, 30wt% of silt, 10wt% of stone powder, 10wt% of activator, 2wt% of retarder and 0.1wt% of dispersant were mixed, stirred and ground by PLC system to prepare a uniform The mixture has a particle size of 80 μm, 28.68%, and a moisture content of 9.2%; the prefabricated uniform mixture is transported to the hopper of the autoclaved brick automatic hydraulic machine through the PLC system, and the pressing time is 5s to 10s under the pressure of 20MPa. The speed is 64 blocks to 128 blocks / min; the mixture is statically pressed to form the brick body, and the brick body is neatly placed on the trolley entering the autoclave by using a palletizer, waiting to enter the autoclave for autoclave treatment; The process does not require maintenance or static rest, and is directly transported to the autoclave through the ferry car and the conveyor track; the autoclave temperature is 194 ° C, the pressure is 1.2 MPa, the saturated vapor pressure in t...

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Abstract

The invention discloses a method for preparing a high-performance autoclaved flyash-lime brick by static molding, belonging to the technical field of building materials. The flyash-lime brick is produced under an autoclaved condition by using coal ash, tails, slag, silt and limestone as main raw materials, cement and carbide slag as excitants, ardealite and titanium gypsum as retarders and other additives as auxiliary raw material. By the technology, silicate products such as flyash-lime brick is produced under the autoclaved condition by mixing, stirring, grinding and delivering coal ash, tails, slag, silt and limestone through a programmable logic controller (PLC) system, and carrying out static pressing through an autoclaved brick automatic hydraulic press. The autoclaved flyash-lime brick prepared by static molding has the superior characteristics of high strength, little shrinkage and small volume weight, the indexes conform to the national standard even the standard of high-class products, and the product meets the requirement of Autoclaved Flyash-lime Brick (GB11945-1999) and Flyash-lime Brick (JC239-2001). The method is simple in process, high in efficiency and low in cost, and thereby having remarkable economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for preparing high-performance autoclaved bricks by using fly ash or tailings. Background technique [0002] As one of the world's major coal-producing and coal-consuming countries, coal will still be the main energy demanded by various energy industries for a long period of time in the future. Coal resources account for 90% of the total proven primary energy; although the country It has been committed to the in-depth development of clean resources such as hydropower, nuclear power, and wind power, but thermal power still dominates as a traditional model. As the waste residue of industrial power plants, the discharge of fly ash has increased sharply year by year. According to statistics, in 2009, the national discharge of fly ash was nearly 400 million tons, and the cumulative amount of fly ash piled up was more than 5 billion tons. The massive discharge and accumulation of fly ash not only occupies a large amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B18/08
CPCY02W30/91
Inventor 王东孙坚强侯喜锋崔爱华
Owner 安徽建鑫新型墙材科技有限公司
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