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Baking-free brick produced from residual slags generated by indirect coal liquefaction and production method thereof

A technology of liquefaction residue and production method, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., to achieve the effects of simple production process, short production cycle and smooth surface

Inactive Publication Date: 2013-06-26
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among the existing technologies, there is no method for making non-burning bricks specifically for indirect coal liquefaction residues. Documents such as the Chinese invention application patent with application number 200810015408.0 (authorized announcement number is CN100577331C) are titled "A Production of Steel Slag Non-burning Bricks" ", discloses a non-fired brick using two or more of steel slag sand, iron slag powder, blast furnace slag, and lime as raw materials, and does not involve coal indirect liquefaction residue

Method used

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  • Baking-free brick produced from residual slags generated by indirect coal liquefaction and production method thereof
  • Baking-free brick produced from residual slags generated by indirect coal liquefaction and production method thereof

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specific Embodiment approach

[0026] The production method of the above-mentioned coal indirect liquefaction residue unburned brick of the present invention, its preferred embodiment is:

[0027] Include the following steps:

[0028] Pre-mixing: Coal indirect liquefaction gasification slag, coal indirect liquefaction thermal power slag, coal indirect liquefaction dust, quicklime, gypsum are prepared according to the above weight ratio, add water and stir until evenly mixed;

[0029] Aging: Send the pre-mixed material into a steam curing room at 65°C to 80°C for aging for 2h to 4h;

[0030] Secondary stirring: Add the aged material to the cement with the above weight ratio, add water and stir until evenly mixed;

[0031] Molding: Send the second-mixed material to a vibrating table with a frequency of 60 times / min for 1min to 2min molding;

[0032] Steam curing: Send the formed bricks without demoulding to a steam curing room at 80°C to 100°C for 18h to 24h;

[0033] Demoulding out of the chamber for sort...

specific Embodiment

[0042] Taking coal indirect liquefaction gasification slag, coal indirect liquefaction thermal power slag, coal indirect liquefaction dust removal ash produced by an indirect coal liquefaction enterprise as research objects, gasification slag SiO 2 The content is 40.96%, Al 2 o 3 Content is 11.1%, thermodynamic slag SiO 2 The content is 62.54%, Al 2 o 3 The content is 5.54%, dust removal dust SiO 2 The content is 45.51%, Al 2 o 3 The content is 8.14%.

[0043] Such as figure 1 As shown, it includes a pre-stirring step, an aging step, a second stirring step, a molding step, a steaming step, and the like.

[0044] It is prepared from the following raw materials according to the following proportions: coal indirect liquefaction gasification slag 35.6%, coal indirect liquefaction thermal power slag 32.4%, coal indirect liquefaction dust removal 14%, cement 6%, quicklime 8%, gypsum 4%, The particle size of coal indirect liquefaction and gasification slag is ≤5mm, the parti...

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Abstract

The invention discloses a baking-free brick produced from residual slags generated by the indirect coal liquefaction and a production method thereof. The baking-free brick comprises the following raw materials in parts by weight: 30 to 40 parts of slags generated by indirect coal liquefaction and gasification, 30 to 50 parts of thermodynamic slags generated by the indirect coal liquefaction, 10 to 20 parts of dust-removing ash generated by the indirect coal liquefaction, 6 to 15 parts of cement, 8 to 10 parts of calcined lime and 3 to 4 parts of gypsum. The production method comprises the following steps of: carrying out pre-stirring, aging, secondary stirring, molding, steam curing, demolding, sorting and the like on the raw materials. The method realizes reutilization of the residual slags, and is simple and convenient in preparation process, low in cost and short in production period. The prepared baking-free brick body is difficult to deform, crack and contract as well as smooth in surface and beautiful in appearance.

Description

technical field [0001] The invention relates to a solid waste treatment and resource recovery technology, in particular to an unburned brick for indirect coal liquefaction residue and a production method thereof. Background technique [0002] Indirect coal liquefaction mainly includes gasification unit, F-T synthesis unit, separation unit, and post-processing and upgrading unit. On the one hand, indirect coal liquefaction solves the contradiction between supply and demand of petroleum routes, and on the other hand, it has the advantages of high-quality oil products. my country rises. However, a large amount of residues are produced in the entire process of indirect coal liquefaction, and the residues cannot be reused after being piled up or buried. Not only does it consume a lot of land for stacking, the processing cost is high, and the heavy metals and organic poisons deposited in the slag will also pollute the environment. Therefore, it is necessary to find a method to dea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10
CPCY02W30/91
Inventor 何绪文章丽萍马圣存李冬潘伟一史云天崔炜
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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