Mine-filling cementing material and preparation method thereof

A mine filling and cementing material technology, applied in the field of cementing material and its preparation, can solve the problems of low water absorption capacity, high application cost, poor cementation effect, etc., and achieve strong adsorption and water retention capacity, saving energy and manufacturing costs, and saving costs Effect

Inactive Publication Date: 2010-07-21
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement is the most widely used cementing material for mine filling, but cement is a general cementing material in the construction industry. The application cost of cementing material for mine filling is high, and the cementing effect on the mineral processing tailings filling aggregate with high sulfur content is poor. , low water adsorption capacity; adding cement as the main material as cement for mine filling can reduce the application cost, and can partially improve the adaptability to high-sulfur tailings and partially improve the water adsorption capacity, but the main material is cement , so the improvement effect is restricted

Method used

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  • Mine-filling cementing material and preparation method thereof
  • Mine-filling cementing material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] The iron-making water quenching slag is used as the main raw material, quicklime is used as the intensifying agent, and gypsum is used as the strengthening agent, which is dried and then dry-ground into powder; the iron-making water quenching slag powder, quicklime powder and gypsum powder are respectively pressed 0.85: 0.15: 0; 0.82: 0.15: 0.03; 0.80: 0.17: 0.03 and 0.75: 0.22: 0.05, and prepared into cementitious material slurry according to the water-cement ratio of 0.60-0.75, 3-day uniaxial Compressive strength: 2.23-2.56MPa; 7-day strength: 10.78-11.98MPa; 28-day strength: 19.86-21.30MPa; 60-day strength: 23.67-27.42MPa (see Table 1). Among them, the uniaxial compressive strength value obtained by the cementitious material compounded with the raw material ratio of 0.82:0.15:0.03 and the water-cement ratio of 0.65 is the highest.

[0019] Table 1

[0020]

Embodiment 2

[0022] Three kinds of molten ironmaking slag R produced by three different steel mills were used respectively. 1 , R 2 , R 3 , according to the dry weight ratio of 0.82:0.15:0.03, the main material of iron-making water quenching slag, quicklime intensifier and gypsum strengthening agent are mixed, dried, ground and stirred to obtain the iron-making water produced by different steel factories. Quenched slag is used as the main raw material for the cement. The slurries of three cementing materials were prepared according to the water-cement ratio of 0.65, and the uniaxial compressive strength of the cementing material test blocks were respectively obtained (see Table 2).

[0023] Table 2

[0024]

Embodiment 3

[0026] Using iron-making water quenching slag R 1 As the main raw material, quicklime and gypsum are prepared into slurry by mixing iron-making water-quenching slag main material, quicklime intensifier, and gypsum strengthening agent in a weight ratio of 0.82:0.15:0.03, and mixed with water-quenching slag and then wet-milled to form a cement material. The cementing material of the present invention is stirred and mixed with copper ore graded tailings to prepare the cemented filling, the weight concentration is 68-75%, and the lime-sand ratio is 1:4-12. The uniaxial compressive strength value of the obtained graded tailings cemented filling material test block can meet the requirements of the filling mining process (see Table 3).

[0027] table 3

[0028]

[0029]

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Abstract

The invention relates to a mine-filling cementing material and preparation method thereof. The cementing material is prepared from the following raw materials in weight percentage: 75 to 85 percent of iron-making water-granulated slag which is quenched by water, 15 to 22 percent of activating agent and 0 to 5 percent of intensifier, wherein the activating agent comprises quicklime or hydrated lime and the CaO content of the activating agent is 70 to 80 percent based on the dry weight; the intensifier comprises plaster; and the grinded granularity of the raw materials is + 0.071 millimeters and the content of the grinded raw materials is not more than 12 percent. The preparation method comprises the steps of: drying the raw materials, mixing the raw materials in a ratio, dryly grinding the raw materials to prepare dry a mine filling cementing material; or drying the raw materials, dryly grinding the raw materials respectively and then mixing the raw materials to prepare a dry material in a ratio; or mixing the raw materials in a dry weight ratio, adding water into the mixture and wetly grinding the mixture to obtain the mine-filling cementing material slurry. The mine-filling cementing material and the preparation method thereof can save cost and realize the high-efficiency waste resource recycling; tail cementing filling material prepared by adopting the cementing material of the invention has the advantages of relatively high mechanical strength, high water absorption capability and high sulphate resistance, so the min- filling cementing material is a cementing material better than cement in the aspect of mine cemented filling.

Description

technical field [0001] The invention relates to a cementing material and a preparation method thereof, in particular to a cementing material for mine filling and a preparation method thereof. Background technique [0002] Mine cemented filling is an effective means to protect the ecological environment of mining areas and improve the utilization rate of mineral resources. It meets the requirements of the two-oriented society, so its application scope is becoming more and more extensive. Mine cemented filling needs to use cementing materials to consolidate loose aggregates such as beneficiation tailings, waste rock or other types of sand and stones into a cemented body with a certain bearing capacity. The cementing materials used are usually: one is cement, and the other is a cementing material in which finely ground additives such as fly ash, volcanic ash or ground smelting slag are added with cement as the main material. Cement is the most widely used cementing material fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08
CPCC04B2111/2015C04B28/08
Inventor 周爱民姚中亮
Owner CHINA MINMETALS CHANGSHA MINING RES INST
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