Tailing cementing agent

A cementing agent and tailings technology, applied in the field of tailings cementing agent and its preparation, can solve the problems of complex preparation method, high dosage and high production cost of filling materials, and achieve remarkable environmental protection effect, simple process and high fluidity Effect

Inactive Publication Date: 2016-10-26
贾志奎 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The slag powder comes from Inner Mongolia Baotou Iron and Steel Co., Ltd., and the measured Bo’s specific surface area 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, Hugeqi Sumu West Copper Mine, the particle size is less than 2mm, without classification or other treatment.

[0026] The fly ash comes from Shanba Power Plant in Bayannaoer City, Inner Mongolia; the slag comes from Zijin Mining Co., Ltd., Wulatehou Banner, Inner Mongolia.

[0027] Mix the prepared raw materials according to the ratio in Table 1, add water and stir it with a mixer to make a slurry (see "mass concentration" in Table 1), refer to GB / T8077-2000 "Concrete Admixture Uniform 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 te...

Embodiment 3

[0038] The slag powder, lime slag powder and tailing sand used in this embodiment are the same as those in Embodiment 1.

[0039] The difference is that the phosphogypsum used in Example 1 is replaced with desulfurized gypsum and fluorogypsum respectively. After grinding the desulfurized gypsum, the measured specific surface area is 380m 2 / Kg; after grinding the fluorine gypsum, the measured specific surface area is 380m 2 / Kg.

[0040] Mix the prepared raw materials according to the ratio in Table 3, add water, and use a mixer to stir it evenly to make a slurry. Refer to GB / T8077-2000 "Concrete Admixture Homogeneity Test Method", adopt "micro-slump Measure the fluidity value of the slurry by using the "degree meter method", then inject the prepared slurry into a triple test mold of 40mm×40mm×160mm, and put it into a curing box (at a temperature of 20°C and a humidity of 90%) for 3 days of curing Demoulding, put the demoulded test block into water at 20°C for further curin...

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Abstract

The invention provides a tailing cementing agent which is formed by mixing a raw material dry basis and water. The tailing cementing agent is characterized in that the dry basis is prepared from, by weight, 5%-12% of slag, 1%-5% of fly ash, 4%-6% of furnace slag, 3%-6% of lime sludge, 5%-20% of cement clinker, 2%-10% of industrial by-product gypsum and 75%-90% of tailing sand; the weight percentage of the raw material dry basis ranges from 65% to 75%, and the weight percentage of the water ranges from 25% to 35%. The tailing cementing agent is high in strength, simple in process, large in fluidity and suitable for gravity-flowed filling; less cement or cement clinker exists in the component of filling slurry, the utilization rate of the tailing sand is high, and the production cost is very low; the tailing sand is not subjected to stage treatment, the tailing cementing agent is not limited to single tailing, the application range is wide, stacking and pollution problems of the tailings are partially solved, resource utilization of other industrial waste residues such as steel slag, the slag and the industrial by-product gypsum is achieved, and the environmental protection effect is very significant.

Description

technical field [0001] The invention belongs to the technical field of mining engineering and building materials, and in particular relates to a tailings cement and a preparation method thereof. Background technique [0002] In 2011, my country produced 1.58 billion tons of tailings, including 806 million tons (51%) of iron tailings, 307 million tons (19.4%) of copper tailings, and 201 million tons (12.7%) of gold tailings, and they are still increasing year by year. Waste-free mining is an inevitable trend of mining development, especially mine cemented filling technology and filling materials that can make full use of mine solid waste. The filling mining method can not only fully recover mineral resources under complex conditions, but also reduce the discharge of solid waste in mines and protect the surface from damage. [0003] While the mining industry seeks resources, a large number of goafs are formed, and the instability of the gobs collapses or collapses, causing dam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/143C04B28/144C04B2201/50C04B7/00C04B18/08C04B18/141C04B18/142C04B18/12C04B22/146
Inventor 贾志奎
Owner 贾志奎
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