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Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof

A technology for mine filling and cementitious materials, which is applied in the direction of cement production, etc., can solve the problems of low pollution and low cost, and achieve the effects of low pollution, low cost and simple preparation methods

Inactive Publication Date: 2020-12-18
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a cementitious material for wet grinding tailings-based mine filling and its preparation method and application. The cementitious material for wet-grinding tailings-based mine filling provided by the present invention can replace cement as mine filling cement Condensate materials, low cost, low pollution, and solve the problem of massive accumulation of mine tailings, in line with the concept of green and sustainable development

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  • Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof
  • Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof

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preparation example Construction

[0037] The present invention also provides a preparation method of the wet grinding tailings-based mine filling cementitious material described in the above technical solution, comprising the following steps:

[0038] a) After mixing the tailings, water-quenched slag and water, carry out wet grinding treatment to obtain slurry;

[0039] b) Add a powder sodium-based activator to the slurry obtained in step a), and perform dry mixing to obtain a cementitious material for mine filling based on wet grinding tailings.

[0040] The invention first mixes the tailing sand, the water-quenched slag and water, and then performs wet grinding treatment to obtain the slurry. In the present invention, the tailings, water-quenched slag and water are the same as those in the above technical solution, and will not be repeated here.

[0041] In the present invention, zirconium silicate grinding balls are preferably used in the wet grinding process, and the ball-to-material ratio (mass ratio of ...

Embodiment 1

[0065] (1) After mixing 25 parts by weight of tailings and 25 parts by weight of water-quenched slag, add an equal amount (50 parts by weight) of water for wet grinding; the wet grinding process uses zirconium silicate grinding balls (particle size The mass ratio is 3mm: 2.5mm: 0.7mm=2:5:3), the ball-to-material ratio (mass ratio of the grinding ball to the solid in the waste slurry) is 2.5:1, the mill speed frequency is 45Hz, and the time is 50min; Obtain a slurry with a solid content of 50%;

[0066] The fineness D90 of the slurry is 8.8 μm, and the specific surface area is 950 m 2 / kg.

[0067] (2) Add 3 parts by weight of powder sodium-based activator to the slurry obtained in step (1), and dry-mix it in a mixer at a speed of 280±10r / min for 2 minutes to obtain a wet-grinding tailings-based mine filling gelling material.

Embodiment 2

[0069] (1) After mixing 25 parts by weight of tailings and 25 parts by weight of water-quenched slag, add 75 parts by weight of water for wet grinding treatment; the wet grinding treatment uses zirconium silicate grinding balls (the particle size and mass ratio are 3mm: 2.5mm: 0.7mm=2:5:3), the ball-to-material ratio (the mass ratio of the grinding ball to the solid in the waste slurry) is 2.5:1, the mill speed frequency is 45Hz, and the time is 50min; the solid content is 40 % of slurry;

[0070] The fineness D90 of the slurry is 9.4 μm, and the specific surface area is 916m 2 / kg.

[0071] (2) Add 3 parts by weight of powder sodium-based activator to the slurry obtained in step (1), and dry-mix it in a mixer at a speed of 280±10r / min for 2 minutes to obtain a wet-grinding tailings-based mine filling gelling material.

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Abstract

The invention relates to a wet-grinding tailing-based mine filling cementing material and a preparation method and application thereof. The wet-grinding tailing-based mine filling cementing material is prepared from the following raw materials in parts by weight: 20-30 parts of tailings, 20-30 parts of water-quenched slag, 40-90 parts of water, and 1.6-4.8 parts of a powder sodium excitant. Compared with the prior art, the wet-grinding tailing-based mine filling cementing material provided by the invention adopts specific content components, can realize better interaction, can replace cement as the mine filling cementing material, is low in cost and small in pollution, remarkably improves the utilization rate of mine tailings, solves the problem of accumulation of a large amount of mine tailings, and is suitable for the concept of green sustainable development. Filler slurry further obtained by adopting the wet-grinding tailing-based mine filling cementing material provided by the invention is good in fluidity and excellent in mechanical property.

Description

technical field [0001] The invention relates to the technical field of mine filling, and more specifically relates to a cementitious material for mine filling based on wet grinding tailings and its preparation method and application. Background technique [0002] Mineral resources are one of the essential energy sources in the process of economic development. my country's mineral resources are abundant and widely distributed, and most mines are mined by the open-field method; but in the actual mining process, the open-field method will lead to the formation of a large number of irregular open-field areas in the mine, which seriously affects the mine environment; The mining and production of mines also brings certain hidden dangers. With the continuous improvement of our country's policies related to mining, the filling and filling mining method has gradually been widely used. The filling mining method refers to filling the blank area formed by the original mining to control...

Claims

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Application Information

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IPC IPC(8): C04B12/00C04B7/24
CPCC04B7/24C04B12/005Y02P40/10
Inventor 高英力曹韩硕万红伟段开瑞周文娟裴甘鹏龙国鑫
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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