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Full-tail paste composite material and preparation method thereof

A composite material and full tail paste technology, applied in the field of mine filling, can solve problems such as poor permeability, affecting the normal coagulation of cementitious slurry, and failure of normal coagulation of filling slurry, and achieves reliable results, convenient on-site operation, and shortened cycle time. Effect

Inactive Publication Date: 2011-06-15
UNIV OF SCI & TECH BEIJING
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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

Method used

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  • Full-tail paste composite material and preparation method thereof
  • Full-tail paste composite material and preparation method thereof

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Embodiment Construction

[0022] A mine uses full tailings-water quenched slag for paste filling. The fineness of the whole tailings is relatively fine, and the content of -20um is between (76% and 83%). The tailing mortar from the concentrator is flocculated and concentrated in the thickener, and then mixed with cement and water-quenched slag to prepare a paste, which is then transported to the underground stope by gravity. During the initial production stage, stope filling did not solidify many times, which affected the normal mining of nearby stopes. For this reason, various measures have been studied, including adding lime slurry, high-efficiency water reducer, and various early strength agents, but they cannot completely solve the problem of retarding the tailings. On the basis of fully analyzing the reasons for the retardation of the whole tailings, it is considered that the main reason for the retardation is that the fineness of the whole tailings is too fine, which affects the normal hydration...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/08
Inventor 王洪江吴爱祥焦华喆刘晓辉翟永刚陈进严庆文吉学文黄吉荣何世林
Owner UNIV OF SCI & TECH BEIJING
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