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Cementing material for enhancing stability of tailing dam and application thereof

A technology of cementitious material and tailings dam, applied in filling, construction and other directions, can solve the problems of poor tailings gelation capacity, low shearing strength of tailings dam, prone to dam failure accidents, etc., and achieves industrial cost. Low, strong gelling power, simple ingredients

Active Publication Date: 2020-08-14
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that the cementing material in the prior art has poor ability to act on the tailings gel, the tailings dam of the building has low shear strength, and dam failure accidents are prone to occur, the first purpose of the present invention is to provide a It is a cementitious material that can play a good role in gelling tailings and significantly improve the shear strength of tailings dams. The formula of the cementitious material is simple, and the raw material comes from industrial waste residues. It has the advantage of low cost and is in line with waste treatment sustainable development requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The naturally dried lead-zinc tailings (D 50 Be 43) the gelling agent of the present invention (containing mineral powder 59%, sodium carboxymethylcellulose 25%, sodium carbonate 10%, sodium hydroxide 5%, sodium lignosulfonate 1%) with 1% dosage Stir in the cement slurry mixer at a low speed for 120 seconds, add 15% tap water after standing still, and then stop the machine after stirring rapidly for 120 seconds. Put the mixed tailings sample in the forming mold, and put the mold on the universal testing machine for pressing. Then use a hydraulic electric demoulder to demould, and then maintain in a constant temperature and humidity curing box for 3 days (the temperature is 20° C., and the relative humidity is 90%). After the curing is completed, use a quadruple shearer to test its shear force. Shear force is represented by the combination of cohesion force and internal friction angle.

[0029] The experimental results are: the cohesive force is 37.257kPa, and the inter...

Embodiment 2

[0031] The naturally dried lead-zinc tailings (D50 Be 43) mix with the gelling agent of the present invention (containing mineral powder 59%, sodium carboxymethyl cellulose 25%, sodium carbonate 10%, sodium hydroxide 5%, sodium lignosulfonate 1%) with 2% dosage A certain amount of the gelling agent of the present invention is stirred at a low speed for 120 seconds in a cement slurry mixer, and after standing still, 15% tap water is added, and the machine is stopped after stirring rapidly for 120 seconds, and the tailings sample that has been stirred is placed in a forming mold, and the Put it on a universal testing machine and press it into shape, then use a hydraulic electric demoulder to demould, and then cure it in a constant temperature and humidity curing box for 3 days (the temperature is 20°C, and the relative humidity is 90%). After the curing is completed, use a quadruple shear Instrument to test its shear force. Shear force is represented by the combination of cohesi...

Embodiment 3

[0034] Naturally dried copper tailings (D 50 124) and 1% of the gelling agent of the present invention (containing mineral powder 55%, sodium carboxymethylcellulose 28%, sodium hydroxide 16%, sodium lignosulfonate 1%) of the present invention Stir the coagulant in the cement slurry mixer at a low speed for 120 seconds, add 15% tap water after standing still, and then stop the machine after stirring rapidly for 120 seconds. Put the mixed tailings sample in the forming mold, and put the mold on the universal testing machine Press to form, and then use a hydraulic electric demoulder to demould, and then maintain it in a constant temperature and humidity curing box for 3 days (the temperature is 20°C, and the relative humidity is 90%). After the curing is completed, use a quadruple shearer to test its shear. force. Shear force is represented by the combination of cohesion force and internal friction angle.

[0035] The experimental results are: the cohesive force is 29.551kPa, a...

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Abstract

The invention discloses a cementing material for enhancing the stability of a tailing dam and application of the cementing material; the cementing material comprises mineral powder, sodium carboxymethyl cellulose, an alkaline activator and a surfactant, and the cementing material can obviously improve the shear strength of the tailing dam, ensure the safe use of the tailing dam and meet the requirements of mine safety construction and sustainable development.

Description

technical field [0001] The present invention relates to a cementitious material and its application, in particular to a cementitious material used in tailings building tailings dams, and also to the application of the cementitious material in building tailings dams with high stability, which belongs to mine safety And the technical field of secondary resource recycling. Background technique [0002] With the rapid development of modern industrialized production in my country and the world and the gradual increase of mineral resources according to the intensity of development, the discharge and accumulation of solid waste such as tailings, discarded rocks and tailings are also increasing. According to the statistics of the China Academy of Land and Resources Economics, as of 2015, the cumulative stockpiles of tailings and waste rocks in my country were nearly 60 billion tons, of which 14.6 billion tons were stockpiled, and the annual discharge of tailings was as high as 1.5 b...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B40/02E02D17/18
CPCC04B28/006C04B40/0259C04B2201/10E02D17/18E02D2300/0045C04B18/12C04B18/141C04B24/383C04B24/18C04B22/062C04B22/10
Inventor 侯浩波夏成功李嘉豪周旻冯露董祎挈
Owner WUHAN UNIV
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