Clinker-free compound-type tailing consolidating agent as well as preparation and application for same

A cementing agent and composite technology, which can be used in clinker production, waste reduction, cement production, etc., can solve the problems of inconvenient popularization and application, complex production process, high cost, low production cost, avoid high pollution, early stage high intensity effect

Inactive Publication Date: 2013-06-12
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials of these developed new cementitious materials all contain cement clinker, and generally have problems such as high cost, large investment, and complicated production process, which is not convenient for popularization and application in wider fields.

Method used

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  • Clinker-free compound-type tailing consolidating agent as well as preparation and application for same
  • Clinker-free compound-type tailing consolidating agent as well as preparation and application for same
  • Clinker-free compound-type tailing consolidating agent as well as preparation and application for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The clinker-free composite tailings consolidation agent has the following composition by weight: 68% slag, 25% desulfurization ash, and 7% composite activator.

[0027] Among them, the slag is the raw material obtained by drying the waste slag discharged from the blast furnace of the iron and steel smelter after water quenching, and its moisture content is 0.76%; the desulfurization ash is the desulfurization by-product produced by the flue gas desulfurization process of the coal-fired power plant after drying. Dry the raw material obtained, and detect that its water content is 0.65%; each component in the composite activator is: quicklime 63%, anhydrous gypsum 35%, ZnCl 2 2%.

[0028] Preparation steps: Put all the slag, desulfurization ash, and composite activator into the ball mill, and grind for 1 hour under the condition of the material-ball ratio of 1:10, until the specific surface area is not less than 400m 2 / kg of tailings consolidation agent.

[0029] Tailin...

Embodiment 2

[0034] The clinker-free composite tailings consolidation agent has the following composition by weight: 60% slag, 35% desulfurization ash, and 5% composite activator.

[0035] Among them, the slag is the raw material obtained by drying the waste slag discharged from the blast furnace of the iron and steel smelter after water quenching, and its moisture content is 0.58%; the desulfurization ash is the desulfurization by-product produced by the flue gas desulfurization process of the coal-fired power plant after drying. Dry the raw material obtained, and detect that its water content is 0.77%; each component in the composite activator is: slaked lime 55%, dihydrate gypsum 40%, KCl 2% and CaCl 2 3%.

[0036] The preparation steps are as follows: put all the slag, desulfurization ash, and composite activator into the ball mill, and grind for 1.5 hours under the condition of the material-ball ratio of 1:9 until the specific surface area is not less than 400m 2 / kg of tailings cons...

Embodiment 3

[0042] The clinker-free composite tailings consolidation agent has the following composition by weight: 55% slag, 39% desulfurization ash, and 6% composite activator.

[0043]Among them, the slag is the raw material obtained by drying the waste slag discharged from the blast furnace of the iron and steel smelter after water quenching, and its moisture content is detected to be 0.65%; Dry the raw material that obtains, detect its water content and be 0.80%; Each component is in the compound activator: slaked lime 40%, Na 2 CO 3 15%, alum 25%, anhydrite 15%, CaCl 2 5%.

[0044] The preparation steps are as follows: put all the slag, desulfurization ash, and composite activator into the ball mill, and grind for 1.2 hours under the condition of the material-ball ratio of 1:11 until the specific surface area is not less than 400m 2 / kg of tailings consolidation agent.

[0045] Tailings Consolidation Experiment: Mix the graded tailings (from the tailings classification station) ...

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Abstract

The invention relates to a clinker-free compound-type tailing consolidating agent as well as a preparation and an application for the same, wherein the clinker-free compound-type tailing consolidating agent comprises the following components in percentage by weight: 55-72% of blast furnace water-quenched slag, 20-35% of desulfurization ash, and 2-15% of compound excitant. Via the clinker-free compound-type tailing consolidating agent disclosed by the invention, a new way is opened up for comprehensive utilization for the industrial solid wastes aforementioned, the cemented filling cost of tailing is reduced, and the purpose of treating wastes by using wastes is realized, thus obtaining remarkable, economic, social and environmental benefits.

Description

technical field [0001] The invention relates to a clinker-free composite tailings consolidation agent and its preparation method and application. Background technique [0002] In metal mining operations, large amounts of solid waste are generated, with tailings containing the highest content. A large number of stockpiled tailings not only occupy land resources and destroy landform vegetation, but also contain heavy metal elements such as lead and cadmium and chemicals, which will cause pollution to surface water, groundwater and the atmospheric environment. The application of cemented filling technology can not only make full use of mine solid waste, improve the strength of filling body, effectively inhibit the destruction of surrounding rock, thereby avoiding surface subsidence and protecting the ecological environment, but also eliminate or reduce the negative impact of mine solid waste discharge. [0003] In the cemented filling of mines at home and abroad, most of them ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/153C04B7/36C04B28/08
CPCY02P40/121Y02P40/143Y02P40/10
Inventor 张发文沈连峰袁远杨建涛余倩寇渊博
Owner HENAN AGRICULTURAL UNIVERSITY
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