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A system and method for preparing sulphoaluminate ultra-high water filling material by using industrial solid waste

A filling material and sulfoaluminate technology, which is applied in the field of solid waste resource utilization and environmental protection, can solve the problem that high water filling material filling and mining is difficult to obtain considerable economic benefits, cannot meet actual needs, and affects support strength, etc. problems, to avoid occupation and pollution, reduce energy consumption, and achieve the effect of saving energy and reducing consumption

Active Publication Date: 2019-06-14
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The above five basic properties are issues that need to be considered in the traditional preparation of high-water filling materials, but with the deepening of mining of resources such as coal mines, these basic properties can no longer meet the actual needs
For example, the high water filling material solidified body exposed to the air will be affected by weathering, which will also seriously affect its support strength
[0011] In addition, the main raw materials of the existing high-water filling materials are fly ash, cement, quicklime, gypsum, foaming agent and water, etc., all of which require high costs. Therefore, the filling and mining of high-water filling materials is difficult. achieve considerable economic benefits

Method used

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  • A system and method for preparing sulphoaluminate ultra-high water filling material by using industrial solid waste
  • A system and method for preparing sulphoaluminate ultra-high water filling material by using industrial solid waste
  • A system and method for preparing sulphoaluminate ultra-high water filling material by using industrial solid waste

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 As shown, the aluminum ash, calcium carbide slag, desulfurized gypsum, and iron tailings are dried until the moisture content is not greater than 5%. The coal gangue and iron tailings are pulverized, and mixed with aluminum ash, carbide slag, and desulfurized gypsum. In terms of solid matter, iron tailings account for 8 parts by weight, coal gangue accounts for 22.55 parts by weight, desulfurized gypsum accounts for 19.05 parts by weight, and calcium carbide The slag accounts for 35 parts by weight, and the aluminum ash accounts for 20 parts by weight. After the materials are blended, they are ground and homogenized. After grinding, they are directly transported into the rotary kiln for calcination. The calcination temperature is 1250°C and the calcination time is 70 minutes. The main phases of the clinker after firing are calcium sulfoaluminate and dicalcium silicate. Take the above base material, add 0.5% of the mass of the base material as quick-se...

Embodiment 2

[0050] Dry aluminum ash, carbide slag, desulfurized gypsum, and iron tailings until the moisture content is not greater than 5%. The coal gangue and iron tailings are pulverized, and mixed with aluminum ash, carbide slag, and desulfurized gypsum. In terms of solid matter, iron tailings account for 10 parts by weight, coal gangue is 20 parts by weight, desulfurized gypsum is 13 parts by weight, and calcium carbide The slag is 30 parts by weight, and the aluminum ash is 15 parts by weight. After the materials are blended, they are ground and homogenized. After grinding, they are directly transported into the rotary kiln for calcination. The calcination temperature is 1300°C and the calcination time is 80 minutes. Take the above base material, add 1% quick-setting agent, 1.5% expansion agent, and 0.5% dispersant of the base material mass, and take another 96 parts of water, the quality of each 2 parts of water is the same as that of the above base material, and mix thoroughly Pr...

Embodiment 3

[0052] Dry the aluminum ash, carbide slag, and desulfurized gypsum until the moisture content is not greater than 5%. The coal gangue and iron tailings are pulverized, and mixed with aluminum ash, carbide slag, and desulfurized gypsum. In terms of solid matter, the iron tailings account for 15 parts by weight, the coal gangue is 25 parts by weight, the desulfurized gypsum is 18 parts by weight, and calcium carbide The slag is 33 parts by weight, and the aluminum ash is 17 parts by weight. After the materials are mixed, they are ground and homogenized. After grinding, they are directly transported into the rotary kiln for calcination. The calcination temperature is 1270°C and the calcination time is 75 minutes. Take the above base material, add 0.7% of the mass of the base material as quick-setting agent, 1% of expansion agent, and 1.5% of dispersant, and take another 96.5 parts of water, the quality of each 2 parts of water is the same as that of the above-mentioned base mater...

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Abstract

The invention discloses a system for preparing a sulphoaluminate superhigh water filling material by using industrial solid waste and a method thereof, and relates to a method for producing the superhigh water filling material by using a matrix material. According to the invention, ferro-silico-aluminum based solid waste such as gangue and calcium sulfate based solid waste such as desulfurized gypsum are taken as the raw materials, the above raw materials are subjected to grinding, homogenizing, sintering and clinker grinding, and the matrix material is prepared. The matrix material is taken as a core material, a specific additive is taken as an auxiliary material, through a certain construction technology, and the superhigh water filling material with highest water content of 97% can be used for backfill of a goaf such as coal mine. In the invention, complementation and utilization of a plurality of large industrial solid and waste can be realized, the produced superhigh water filling material has high cost performance, can substitute the high-quality mineral product resource, and can greatly increase the added value of the large industrial solid waste regeneration products.

Description

technical field [0001] The patent of the present invention relates to the field of resource utilization of solid waste and environmental protection, in particular to a system and method for preparing sulphoaluminate ultra-high water filling material by using industrial solid waste. Background technique [0002] With the continuous and rapid advancement of my country's industrialization process, a large amount of solid waste in mining, metallurgy, electric power, chemical industry and other industries has occupied more and more precious land resources and caused huge pollution to the environment. The plan lists coal gangue, tailings, smelting slag, red mud, by-product gypsum, and fly ash as the main solid waste treatment objects of concern. [0003] The development of backfill technology in coal mines and other mined-out areas has been relatively lagging behind, which reduces the efficiency of mining, increases the cost of mining, and causes reduced safety hazards to society a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B7/32C04B7/36C04B111/27C04B111/74
CPCC04B7/323C04B7/36C04B28/065C04B2111/00724C04B2111/27C04B2111/74C04B2201/50C04B2103/12C04B2103/408C04B2103/0068Y02P40/10Y02P40/121
Inventor 王文龙刘晓斌毛岩鹏孙静宋占龙赵希强
Owner SHANDONG UNIV
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