Coal chemical gasified slag sintered brick and preparation method thereof

A technology of gasification slag and coal chemical industry, which is applied in the field of brick making from waste materials, can solve problems such as waste and pollution of environmental resources, and achieve the effects of saving fuel, saving fuel and improving performance

Active Publication Date: 2019-03-26
陕西万伟恒业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a one-million-ton coal indirect gas and oil project will produce more than 600,000 to 900,000 tons of coal gasification slag every year. The residue after coal gasification occupies about 300 acres of land, which not only pollutes the environment but also causes waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The coal chemical gasification slag sintered brick of this embodiment is mainly made of the following raw materials in weight percentage: 24% of gasification slag coarse slag, 8% of gasification slag fine slag, 67.9% of construction waste soil, and 0.1% of additives. The additive is silica fume.

[0032] The gasification slag coarse slag is the residue discharged from the bottom slag pool of the coal gasification furnace through the slag extractor during the coal gasification process; the gasification slag fine slag is the coal gasification gas entrained in the coal gasification process and The residues are separated and discharged during the purification process after the gas leaves the coal gasifier.

[0033] Burn gasification slag coarse slag to obtain ash content, detect the ash content, the ash content after gasification slag coarse slag combustion includes the following components by weight: silicon dioxide 35%, aluminum oxide 16.03%, ferric oxide 14.9%, oxide Ca...

Embodiment 2

[0049] This embodiment is the same as Example 1, except that the additive is sodium silicate, sodium chloride or vanadium compound, or two or more of silica fume, sodium silicate, sodium chloride and vanadium compound , the vanadium compound is vanadium pentoxide and / or vanadium slag.

[0050] The size of the coal chemical gasification slag sintered brick in this embodiment is 240mm×115mm×53mm, the compressive strength range is 23MPa~27MPa, the water absorption range is 18%~28%, and the density range is 1.9g / cm 3 ~2.3g / cm 3 , the color is light reddish brown, and the yield rate is ≥95%.

Embodiment 3

[0052] The coal chemical gasification slag sintered brick of this embodiment is mainly made of the following raw materials in weight percentage: 15% of gasification slag coarse slag, 10% of gasification slag fine slag, 74.5% of construction waste soil, and 0.5% of additives. The additives are silica fume and sodium silicate with a mass ratio of 1:1.

[0053] Coarse gasification slag is the residue discharged from the bottom slag pool of the coal gasification furnace through the slag extractor during the coal gasification process; Separation and discharge of residues during the purification process after the coal gasifier.

[0054] Burn gasification slag coarse slag to obtain ash content, detect the ash content, the ash content after gasification slag coarse slag combustion includes the following components by weight: silicon dioxide 56.92%, aluminum oxide 9.31%, ferric oxide 4.28%, oxide Calcium 24.63%, magnesium oxide 1.3%, titanium dioxide 0.4%, potassium oxide 1.15%, sodiu...

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Abstract

The invention discloses a coal chemical gasified slag sintered brick. The coal chemical gasified slag sintered brick is mainly prepared from following raw materials in percentage by weight: 15%-45% ofgasified slag coarse slag, 8%-15% of gasified slag fine slag, 39%-75% of building waste soil, 0.1%-1% of additives. The invention further provides a method for preparing the coal chemical gasified slag sintered brick. According to the coal chemical gasified slag sintered brick, the gasified slag and the building waste soil are adopted as the raw materials of the coal chemical gasified slag sintered brick, thus the cost is low, pollution caused by gasified slag discarding to the environment can be reduced, the purposes of fuel saving, natural land resource saving and waste-utilizing environmental protection are achieved, the finished product rate of the sintered brick prepared by the method reaches 90% or above, the compressive strength of the sintered brick exceeds 20 MPa, the high void ratio and good water absorption are achieved, and heat preservation and insulation properties of the sintered brick are both significantly improved.

Description

technical field [0001] The invention belongs to the technical field of making bricks from waste materials, and in particular relates to a coal chemical gasification slag sintered brick and a preparation method thereof. Background technique [0002] Over the years, the proportion of coal in my country's primary energy production and consumption structure has remained at about 70%, and more than 90% of coal is mainly used in industrial production in the national economy, and oil and natural gas account for 20% and 3.5% respectively. Although the promotion of the use of green and clean energy has reduced the proportion of coal, as of now, the proportion of coal consumption in my country's primary energy consumption is still as high as 60%. Coal-rich, oil-poor, and gas-poor characteristics make coal the dominant position in my country's energy structure will not change in the short term, and industries such as coal-to-gas and coal-to-oil, which use coal gasification as one of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/13C04B33/32C04B38/00C04B33/138
CPCC04B33/131C04B33/132C04B33/1324C04B33/138C04B33/32C04B38/0041C04B2235/3427C04B2235/44C04B2235/444C04B2235/96C04B38/0067Y02P40/60
Inventor 崔宝剑赵卫东王发印
Owner 陕西万伟恒业科技有限公司
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