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Curing agent for filling iron tailings and preparation method thereof

A technology of curing agent and iron tailings, which is applied in the field of mine safety, can solve the problems of foaming of expansion source, decrease of filling body strength, poor filling effect, etc., and achieve controllable foaming process, prolonged initial setting time, and simple operation Effect

Active Publication Date: 2014-09-17
罗强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings are: the filling material of hydraulic filling lacks cohesive properties, cannot form a stable and self-supporting filling body, and the stope needs a lot of dehydration
The disadvantage is that the filling material has a large water content and shrinks after curing, which makes it difficult to connect the solidified body to the top and the filling effect is poor.
Although the above method solves the problem of the difficulty of filling the solidified body to the top, the entire solidification system is composed of three independent materials, and the three materials are used in different stages of filling, and the expansion agent is added at the end because the filling mud system does not have foam stability. function, causing the hydrogen bubbles of the expansion source to escape and fail to achieve the ideal expansion effect after escaping, and the strength of the filling body is reduced. In addition, the entire operation process is complicated and the process is not easy to accurately control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of curing agent for iron tailings backfill provided by the present invention is to be core material by fly ash, slag micropowder, steel slag micropowder, alkaline activator, sulfate activator, foam stabilizer, aluminum powder Composed of microcapsules, in which fly ash accounts for 25 parts, slag accounts for 28 parts, steel slag accounts for 25 parts, alkaline activator accounts for 10 parts, sulfate activator accounts for 10 parts, foam stabilizer accounts for 0.1 part, and aluminum powder is the core The microcapsules of the material accounted for 1.9 parts;

[0027] Described fly ash is Class I fly ash, and the specific surface area of ​​fly ash is 460m 2 / kg;

[0028] The slag micropowder is ground from water-quenched granulated blast furnace slag, and the specific surface area of ​​the slag micropowder is 400m 2 / kg;

[0029] The steel slag micropowder is ground from converter air-cooled slag, the basicity coefficient of the steel slag is 2...

Embodiment 2

[0038]Embodiment 2: a kind of curing agent for iron tailings backfill provided by the present invention is to be core material by fly ash, slag micropowder, steel slag micropowder, alkaline activator, sulfate activator, foam stabilizer, aluminum powder Composed of microcapsules, of which fly ash accounts for 70 parts, slag accounts for 10 parts, steel slag accounts for 5 parts, alkaline activator accounts for 10 parts, sulfate activator accounts for 3 parts, foam stabilizer accounts for 0.2 parts, and aluminum powder is the core. The microcapsules of the material account for 1.8 parts;

[0039] The fly ash is ground grade III fly ash, and the specific surface area of ​​the fly ash is 600m 2 / kg;

[0040] The slag micropowder is made of water-quenched granulated blast furnace slag, and the specific surface area of ​​the slag micropowder is 500m 2 / kg;

[0041] The steel slag micropowder is made by grinding the air-cooled slag of the converter, the basicity coefficient of the...

Embodiment 3

[0050] Embodiment 3: A kind of curing agent for iron tailings backfill provided by the present invention is composed of microcapsules with slag micropowder, steel slag micropowder, alkaline activator, sulfate activator, foam stabilizer and aluminum powder as the core material , wherein slag accounts for 40 parts, steel slag accounts for 30 parts, alkaline activator accounts for 15 parts, sulfate activator accounts for 10 parts, foam stabilizer accounts for 0.2 parts, and microcapsules with aluminum powder as the core material account for 4.8 parts;

[0051] The slag micropowder is finely ground from water-quenched granulated blast furnace slag, and the specific surface area of ​​the slag micropowder is 560m 2 / kg;

[0052] The steel slag micropowder is ground from converter air-cooled slag, the basicity coefficient of steel slag is 3.0, and the specific surface area of ​​steel slag micropowder is 500m 2 / kg;

[0053] The alkaline activator is compounded with 42.5 grade ordin...

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Abstract

The invention discloses a curing agent for filling iron tailings and a preparation method thereof and belongs to the technical field of mine safety. The curing agent comprise the following components in parts by mass: 0-70 parts of fly ash, 10-80 parts of superfine mineral slag powder, 0-70 parts of superfine steel slag powder, 0-20 parts of an alkaline activator, 0-20 parts of an sulfate activator, 0.1-1 part of a foam stabilizer and 2-5 parts of a microcapsule in which aluminum powder is used as a core material. The preparation method of the curing agent comprises the steps of firstly weighting fly ash, superfine mineral slag powder, superfine steel slag powder, alkaline activator, sulfate activator and foam stabilizer according to the blending ratio of the components of the curing agent, adding all the components in a stirrer, quickly stirring for 5-15 minutes, adding microcapsule in which aluminum powder is used as a core material and slowly stirring for 2-5 minutes to obtain the curing agent for filling iron tailings. The curing agent for filling iron tailings provided by the invention has strong curing capability and is simple and controllable in use and operation.

Description

technical field [0001] The invention belongs to the technical field of mine safety, and in particular relates to a curing agent for filling iron tailings and a preparation method thereof. Background technique [0002] my country is rich in mineral resources, and its reserves rank among the top in the world. There are a large number of buildings, water bodies, railways, and high-grade highways above the mineral deposits, and the problem of "three under" (under the buildings, under the railway, and under the water body) pressing mineral resources exists to varying degrees in each mining area. For a long time, the "three down" mining methods of my country's mines mainly adopt the methods of village (town) relocation, strip, room and pillar mining and filling mining. Among them, filling mining can effectively solve the problem that existing buildings, water bodies, railways, high-grade highways and other facilities above the mine are not affected by the mining process of the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B22/04
Inventor 樊传刚高元宝
Owner 罗强
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