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Mine paste filling material as well as preparation method and application thereof

A technology for filling materials and mines, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of environmental pollution, non-application, etc., achieve high preparation costs, simple and easy-to-operate preparation methods, and facilitate industrial promotion and use Effect

Pending Publication Date: 2021-08-17
QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current mature building materials production technology, there is almost no way to use the hot metal pre-desulfurization slag in large quantities, and due to the strong pulverization, its pollution to the environment is far more than that of converter steel slag and electric furnace steel slag.
[0004] In the prior art, although there are related methods for the treatment of molten iron pre-desulfurization slag, none of them have been applied to fields related to cementation and filling mining.

Method used

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  • Mine paste filling material as well as preparation method and application thereof
  • Mine paste filling material as well as preparation method and application thereof
  • Mine paste filling material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A production method of mine paste filling material, including filling cement as follows: the raw materials used in this embodiment are all solid waste, wherein the percentage content of each raw material is: 60% of pre-desulfurization slag of molten iron, 40% of power plant desulfurization gypsum. The mass of water added in this embodiment is 25% of the mass of all the cemented filling materials, that is, the pre-desulfurized hot metal slag + power plant desulfurized gypsum + ultra-fine tailings on a dry basis, that is, the slurry concentration is 80%. The dosage of water reducer is 0.2% of the dry mass of cemented filling.

[0042] The main chemical components of desulfurization gypsum in power plants are CaO, SO 3 and a small amount of SiO 2 etc., the content of dihydrate gypsum in its phase is 91.6%.

[0043] The main chemical components of KR hot metal pre-desulfurization slag are CaO and SiO 2 , Fe 2 o 3 、Al 2 o 3 And a certain amount of S, of which CaO acco...

Embodiment 2

[0054] A production method for mine paste filling, including filling cement as follows: the raw materials used in this embodiment are all solid waste, and the percentage content of each raw material is: 80% of pre-desulfurization slag of molten iron, 20% of power plant desulfurization gypsum. The mass of water added in this embodiment is 25% of the mass of all the cemented filling materials, that is, the pre-desulfurized hot metal slag + power plant desulfurized gypsum + ultra-fine tailings on a dry basis, that is, the slurry concentration is 80%. The dosage of water reducer is 0.3% of the dry mass of cemented filling.

[0055] The main chemical components of desulfurization gypsum in power plants are CaO, SO 3 and a small amount of SiO 2 etc., the content of dihydrate gypsum in its phase is 91.6%.

[0056] The main chemical components of KR hot metal pre-desulfurization slag are CaO and SiO 2 , Fe 2 o 3 、Al 2 o 3 And a certain amount of S, of which CaO accounts for 74....

Embodiment 3

[0067] A production method of mine paste filling material, including filling cement as follows: the raw materials used in this embodiment are all solid waste, and the percentage content of each raw material is: 50% of molten iron pre-desulfurization slag, and 50% of power plant desulfurization gypsum. The mass of water added in this embodiment is 25% of the mass of all the cemented filling materials, that is, the pre-desulfurized hot metal slag + power plant desulfurized gypsum + ultra-fine tailings on a dry basis, that is, the slurry concentration is 80%. The dosage of water reducer is 0.2% of the dry mass of cemented filling.

[0068] The main chemical components of desulfurization gypsum in power plants are CaO, SO 3 and a small amount of SiO 2 etc., the content of dihydrate gypsum in its phase is 91.6%.

[0069] The main chemical components of KR hot metal pre-desulfurization slag are CaO and SiO 2 , Fe 2 o 3 、Al 2 o 3 And a certain amount of S, of which CaO account...

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Abstract

The invention discloses a mine paste filling material, and relates to the technical field of environmental protection engineering, and the mine paste filling material specifically comprises the following raw materials by weight: superfine tailings, a filling cementing agent and water; wherein the mass ratio of the superfine tailings to the filling cementing agent is 1: (4-7); the mass of the water is 15-35% of the total mass of the superfine tailings and the filling cementing agent; the filling cementing agent comprises the following raw materials in percentage by weight: 40-85% of molten iron pre-desulfurization slag and 15-60% of desulfurized gypsum. Meanwhile, the invention further discloses a method for preparing the mine pasty fluid filling material by mixing the raw materials and application of the mine pasty fluid filling material in filling of a mine goaf. On one hand, the problem that the molten iron pre-desulfurized slag is difficult to recycle in current iron and steel enterprises is solved, and on the other hand, the long-term bottleneck problem of high preparation cost of the cemented filling material in the underground mining field is solved by utilizing the characteristics that the molten iron pre-desulfurized slag is low in price, easy to obtain and even available for disposal and subsidy.

Description

technical field [0001] The invention relates to the technical field of environmental protection engineering, and more specifically relates to a mine paste filling material and its preparation method and application. Background technique [0002] In cemented fill mining technology, the high cost of cement in the filling material hinders the development of cemented fill mining technology for a long time. At present, Portland cement is still the main cement used in cemented filling mining at home and abroad, and its cost accounts for 60%-80% of the entire filling cost. Although solid waste materials such as water-quenched blast furnace slag (slag) ground powder and fly ash have been used in large quantities to replace some ordinary Portland cement in recent years, the fundamental trend of high filling costs has not yet been reversed. In addition, the prices of raw materials such as water-quenched blast furnace slag fine powder and fly ash are also increasing exponentially in m...

Claims

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Application Information

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IPC IPC(8): C04B28/14C09K8/46
CPCC04B28/144C09K8/46C04B2111/00724C04B2201/50C04B18/062C04B18/12C04B2103/302
Inventor 魏欣蕾倪文杜惠惠陈心颖王玉峰吴伟
Owner QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD
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