Mine filling cementing material slurry and preparation method thereof

A mine filling and cementing material technology, which is applied in cement production and other directions, can solve the problems of high production cost, complicated preparation method of filling materials, high dosage, etc., and achieve the effects of high fluidity, remarkable environmental protection effect and simple process

Inactive Publication Date: 2013-10-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although some of the filling materials introduced in the above-mentioned patents have high early strength and some are specially targeted, cement or cement clinker is mixed into the cement and the amount is relatively high, or admixtures are also mixed. The cost is high, the tailings in some patents use graded tailings, and the preparation method of filling materials is also relatively complicated

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The steel slag is taken from Wuhan Iron and Steel Co., Ltd., and after drying, it is ground into steel slag powder. According to GB8074-87 "Measurement Method of Cement Specific Surface Area", its Bo's specific surface area is 462m 2 / Kg; The slag is taken from Wuhan Iron and Steel Co., Ltd., and it is ground into slag powder after drying, and the specific surface area of ​​Bo’s is 445m 2 / Kg; industrial by-product gypsum, selected phosphogypsum, from Anhui Tongling Chemical Group, dried and ground to a specific surface area of ​​456m 2 / Kg; The tailings sand is copper tailings sand, which is taken from Tongling, Anhui Province, and the particle size is less than 2mm, without classification or other treatment.

[0028] Mix the prepared raw materials according to the ratio in Table 1, add water and stir it evenly with a mixer to make a slurry (see "mass concentration" in Table 1), refer to GB / T8077-2000 "Concrete Admixture Uniformity" Qualitative Test Method", using the...

Embodiment 2

[0032] The type and source of raw materials used in this example are the same as in Example 1.

[0033] The difference is that the specific surface area of ​​the slag powder, steel slag powder and phosphogypsum used varies. As shown in Table 2, the specific surface area of ​​one of the steel slag powder, slag powder and phosphogypsum is changed in turn.

[0034] Each raw material is mixed according to the ratio of Group A1 in Example 1, and after adding water, stir it with a mixer to make a slurry (see "mass concentration" in Table 2). Qualitative Test Method", using the "miniature slump meter method" to measure the fluidity value of the slurry, and then inject the prepared slurry into a triple test mold of 40mm×40mm×160mm, and put it into the curing box (temperature is 20°C and 90% humidity) for 3 days to remove the mold, put the demoulded test block into 20°C water to continue curing, and then measure the strength of each age.

[0035] Table 2 Strength results of different ag...

Embodiment 3

[0038] The type and source of raw materials used in this example are the same as in Example 1.

[0039] The difference is that in this example, the slag, steel slag and industrial by-product gypsum were dried separately and mixed and ground according to the proportion of Group A1 in Example 1 to prepare cementitious materials with different specific surface areas. Mix it with water, and then use a mixer to stir it evenly to make a slurry (see "mass concentration" in Table 3). Refer to GB / T8077-2000 "Test Method for Homogeneity of Concrete Admixtures" and use "micro slump Measure the fluidity value of the slurry by using the instrument method, and then inject the prepared slurry into a triple test mold of 40mm×40mm×160mm, put it in a curing box (at a temperature of 20°C and a humidity of 90%) for 3 days to remove After demoulding, the test pieces were put into water at 20°C for further curing, and then the strength of each age was measured respectively. The results are shown in...

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Abstract

The invention belongs to the technical field of mining engineering and building materials and particularly relates to a mine filling cementing material slurry and a preparation method thereof. The preparation method comprises the following steps of: with steel slag, mineral slag and industrial byproduct gypsum as cementing agents and tailing sand as a filling aggregate, adding water, mixing and stirring uniformly to prepare mine filling cementing material slurry, wherein a dry basis of raw materials comprises the following components in percentage by weight: 1-7% of steel slag, 5-12% of mineral slag, 2-10% of industrial byproduct gypsum and 75-90% of tailing sand, and the sum of the weight percentage of the dry basis of all the raw materials is 100%; adding water to regulate the mass concentration of the filling cementing material slurry to be between 65-75%. The mine filling cementing material slurry has the beneficial effects of higher strength, simple process, high flowability and suitablity for self-flowing filling; no cement or cement clinker or additives are added in the components of the filling cementing material slurry which is completely made of solid wastes, so that the utilization rate of the tailing sand is high, and the production cost is very low.

Description

technical field [0001] The invention belongs to the technical field of mining engineering and building materials, and in particular relates to a mine filling cementing material and a preparation method thereof. Background technique [0002] The filling mining method has the advantages of small loss rate, low dilution rate and high safety, and it is also a mining method that can effectively control mine ground pressure activities. With the development of filling mining technology, especially cemented filling mining technology, many complex technical problems in mines have been solved well. It has played a huge role in reducing the dilution rate and loss rate, preventing internal fires, slowing down rockbursts, and effectively controlling ground pressure activities. [0003] The filling material used in the mining filling method is mainly composed of aggregate and cement. Generally, graded tailings, tailings plus river sand or whole tailings are used as the filling aggregate....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147
CPCY02P40/10
Inventor 林宗寿徐军
Owner WUHAN UNIV OF TECH
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