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Formula and preparation method of autoclaved fly ash brick

An autoclaved fly ash brick and fly ash technology, applied in the field of building materials, can solve the problems of difficult transportation and environmental protection management and control, high cost of solid waste treatment, single treatment method, etc., so as to solve the problem of environmental pollution and realize the utilization of solid waste. , the effect of reducing costs

Active Publication Date: 2020-12-04
SHANDONG HUALU HENGSHENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the single-nozzle gasifier device in the coal-water slurry gasification process produces a large amount of coarse slag every year. Due to the high loss on ignition, the coarse slag of the single-nozzle gasifier is used in road construction, cement, sintered bricks and concrete blocks, etc. On the one hand, it has only been partially applied, and there are problems such as single treatment method, large environmental pollution, high cost of solid waste treatment, land occupation, and difficulties in transportation and environmental protection control.

Method used

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  • Formula and preparation method of autoclaved fly ash brick
  • Formula and preparation method of autoclaved fly ash brick
  • Formula and preparation method of autoclaved fly ash brick

Examples

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Embodiment 1

[0038] The present embodiment provides a kind of formula of autoclaved fly ash brick, comprises according to mass percentage:

[0039] Coarse slag mixture, including: 10% to 30% of the first coarse slag, produced by the single-nozzle gasifier; 10% to 30% of the second coarse slag; 35% to 45% of fly ash; and

[0040] The balance of carbide slag;

[0041] Wherein, the particle size distribution of the particles in the coarse slag mixture, according to mass percentage, includes:

[0042] 57% to 66% below 1.2mm;

[0043] 29% to 36% between 1.2mm and 5mm.

[0044] The first coarse slag in the present invention is the hydrated slag discharged from the slag discharge lock hopper at the bottom of the gasifier after the pulped coal particles are melted, chilled and condensed under high temperature and high pressure conditions in the single nozzle gasifier , the main component is SiO 2 、Al 2 o 3 and Fe 2 o 3 , wherein, according to the mass percentage, the particles with a parti...

Embodiment 2

[0050] The present embodiment provides a kind of preparation method of autoclaved fly ash brick, such as figure 1 shown, including steps:

[0051] S101 batching step: weighing the first coarse slag, the second coarse slag, fly ash and carbide slag according to the formula of the present invention;

[0052] S102 mixing step: mixing the first coarse slag, the second coarse slag, fly ash and carbide slag, adding water and stirring to obtain a mixed material. In some embodiments, the moisture content of the mixed material is controlled between 13% and 16%;

[0053] S103 digestion and aging step: digest and age the mixed material in a digestion bin with a larger volume. In some embodiments, the digestion aging time is between 30min and 60min;

[0054] S104 Pressing step: press the digested and aged mixed material, and form brick adobe after several times of pressurization and exhaust, wherein the pressurization pressure is between 140bar and 160bar, and the pressing time is betw...

Embodiment 3

[0076] This embodiment provides a kind of embodiment of the preparation method of the autoclaved fly ash brick, comprising steps:

[0077] 1) batching step: weighing 20% ​​of the first coarse slag, 20% of the second coarse slag, 40% of fly ash and 20% of calcium carbide slag according to the mass percentage;

[0078] 2) Mixing step: mix the first coarse slag, the second coarse slag, fly ash and carbide slag and add water and stir to obtain the mixed material; during specific implementation, the first coarse slag, the second coarse slag and the calcium carbide slag are passed through the The bucket conveyor is transported to the batching silo, and the siliceous material fly ash stored in the ash silo is transported to the fly ash metering hopper through the screw conveyor at the bottom of the ash silo, and the material is accurately discharged and measured according to the established ratio. After the metering is completed, the material is transported to the mixer by a belt con...

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Abstract

The invention discloses a formula and a preparation method of the autoclaved fly ash brick, wherein the autoclaved fly ash brick comprises the components in percentage by mass: a coarse slag mixture,35%-45% of fly ash, and the balance being carbide slag, wherein the coarse slag mixture comprises 10%-30% of first coarse slag produced by a single-nozzle gasification furnace, and 10%-30% of second coarse slag; the particle size distribution of particles in the coarse slag mixture comprises the components in percentage by mass: 57%-66% of particles with the particle size of 1.2 mm or below, and 29%-36% of particles with the particle size of 1.2 mm-5 mm. On one hand, solid waste utilization of the coarse slag of the single-nozzle gasification furnace is realized; and on the other hand, the rawmaterial cost of the autoclaved fly ash brick is reduced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a formula of an autoclaved fly ash brick containing coarse slag from a single-nozzle gasification furnace and a preparation method thereof. Background technique [0002] At present, the single-nozzle gasifier device in the coal-water slurry gasification process produces a large amount of coarse slag every year. Due to the high loss on ignition, the coarse slag of the single-nozzle gasifier is used in road construction, cement, sintered bricks and concrete blocks, etc. On the one hand, it has only been partially applied, and there are problems such as single treatment method, large environmental pollution, high cost of solid waste treatment, land occupation, and difficulties in transportation and environmental protection control. With the strengthening of national environmental protection control measures, the downstream utilization of the gasification coarse slag of th...

Claims

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Application Information

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IPC IPC(8): C04B30/00C04B40/02C04B18/04C04B18/06C04B18/08
CPCC04B30/00C04B40/024C04B18/065C04B18/0481C04B18/08C04B2201/50C04B40/0082Y02W30/91
Inventor 常怀春张聪李丹陈伟元苗红旗孙玉甫
Owner SHANDONG HUALU HENGSHENG CHEM IND
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