Full-tail paste composite material and preparation method thereof

Abstract

The invention discloses a full-tail paste composite material and a preparation method thereof, which belong to the field of inorganic nonmetallic material. The composite material consists of the following raw materials in percentage by weight: 2.8 to 22.0 percent of gelling agent 1, 57.8 to 75.0 percent of filling aggregate 2, 14.8 to 24.8 percent of water 3 and the balance of coagulant 4 which is 10 to 30 percent of the weight of the gelling agent, wherein the filling aggregate 2 consists of full-tail sand 8, water granulated slags 9 or gravels 10; the gelling agent is continuously and uniformly added into a pasty sizing agent by a metering device 5; one end of the metering device 5 is connected with a coagulant container and a water tank, and the other end of the metering device 5 is connected with a section of small-diameter pipeline 6 on a filling main pipe; a one-way check valve 7 is arranged behind the metering device 5 to ensure the flow direction of the coagulant 4; and a small amount of gelling agent is added into the filling sizing agent, so that the setting time can be kept between 30 minutes and 1,200 minutes. By adopting the method, the setting time of the paste material can be adjusted, the cycle period of a slope is shortened, field operation is convenient, and a reliable effect is achieved. The method is suitable for all kinds of full-tail paste filling materials of metal mines.

Description

technical field [0001] The invention belongs to the technical field of mine filling, and relates to a composite material for suppressing the retardation of full tailings and a preparation method thereof, which is suitable for improving the coagulation performance of the whole tailings paste-like cemented filling slurry. Background technique [0002] During the development of metal mineral resources, it is inevitable to produce some solid waste, such as the whole tailings of mineral processing. These wastes not only occupy a large amount of land, but also pollute the environment. On the other hand, in order to improve the mining recovery rate and improve the mining safety level, it is necessary to fill the goaf. Using the waste around the mine as filling material can greatly eliminate mining disasters, realize waste-free mining, and further improve the technical level of energy saving and emission reduction in mines. [0003] However, due to the different properties of each...

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Problems solved by technology

[0003] However, due to the different properties of each mine waste, the coagulation performance of the filling slurry is not exactly the same

From the analysis of physical factors, the particle size of the whole tailings is finer, and its permeability is poor, which makes it difficult for the water between the whole tailings to escape, which affects the normal coagulation of the cement slurry

When full tailings and ordinary Portland cement are used as filling materials, the filling slurry cannot be solidified normally, and the strength of the filling body cannot meet the requirements of mining technology, thus affecting the smooth progress of mining operations

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