A kind of curing agent for iron tailings filling and preparation method thereof

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 specifically relates to a curing agent for iron tailings filling and a preparation method thereof. Background technique [0002] my country has abundant mineral resources, and 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. Various mining areas have the problem of "three unders" (under buildings, railways, and water bodies) compressing mineral resources to varying degrees. For a long time, the "three under" mining methods in my country's mines have mainly adopted several methods such as village (town) relocation, strip mining, room and pillar mining and backfill mining. Among them, filling mining can effectively solve the problem that the existing buildings, water bodies, railways, and high-level highways above the mine are not affected by the mining process. According to the filling ...

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