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Lead-zinc tailing-based alkali-activated cementing material and application thereof

A technology of gelling materials and auxiliary gelling materials, which is applied in the field of preparation of inorganic functional materials, can solve problems such as environmental and resident health hazards, occupation of land resources, etc., to achieve improved mechanical strength, large chemical bond energy, and simple and easy preparation process Effect

Pending Publication Date: 2022-05-17
武汉大学(肇庆)资源与环境技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Combined with the actual mining situation in my country, a large amount of lead-zinc tailings are piled up in the tailings pond to be treated, occupying a large amount of land resources, which poses great hidden dangers to the environment and the health of residents

Method used

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  • Lead-zinc tailing-based alkali-activated cementing material and application thereof
  • Lead-zinc tailing-based alkali-activated cementing material and application thereof
  • Lead-zinc tailing-based alkali-activated cementing material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Get the analytically pure NaOH particles to adjust the water glass modulus to 1.8, leave it to stand and cool for subsequent use;

[0029] (2) Add 280g of unpretreated lead-zinc tailings, 84g of slag, 24g of steel slag, 12g of fluorogypsum and 60g of water glass into the mixer in turn, and add deionized water until the mixture has good fluidity. Stir at room temperature for 5-10 minutes to make the mixture evenly mixed.

[0030] (3) Pour the slurry into a 40mm×40mm×40mm abrasive mold. Keep in the curing box

Embodiment 2

[0032] (1) Get the analytically pure NaOH particles and adjust the water glass modulus to 2.0, leave it to stand and cool for subsequent use;

[0033] (2) Add 360g of unpretreated lead-zinc tailings, 28g of slag, 8g of steel slag, 4g of fluorogypsum and 20g of water glass into the mixer in sequence, and add deionized water until the mixture has good fluidity. Stir at room temperature for 5-10 minutes to make the mixture evenly mixed.

[0034] (3) Pour the slurry into a 40mm×40mm×40mm abrasive mold. Keep in a curing box.

Embodiment 3

[0036] (1) Get the analytically pure NaOH particles to adjust the water glass modulus to 1.8, leave it to stand and cool for subsequent use;

[0037] (2) Add 280g of lead-zinc tailings, 84g of slag, 24g of steel slag, 12g of fluorogypsum and 60g of water glass into the agitator in sequence, and add deionized water until the mixture has good mobility. Stir at room temperature for 5-10 minutes to make the mixture evenly mixed.

[0038] (3) Pour the slurry into a 40mm×40mm×40mm abrasive mold. Keep in a curing box.

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Abstract

The invention discloses a lead-zinc tailing-based alkali-activated cementing material and application thereof. The lead-zinc tailing-based alkali-activated cementing material comprises activated lead-zinc tailings, an auxiliary cementing material and an alkali activator, the activated lead-zinc tailings are obtained by sequentially performing thermal activation and mechanical activation on lead-zinc raw tailings, and the auxiliary cementing material is obtained by mixing slag, steel slag and desulfurized gypsum. The alkali-activated cementing material has a good fixing effect on heavy metals such as Pb and Zn in the lead-zinc tailings, has the characteristic of rapid hardening, has relatively good compressive strength after being formed, and can be applied to industrial production of roadbeds, buildings and the like. The preparation method of the auxiliary cementing material is simple and easy to implement, does not need special equipment, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a gelling material, in particular to a tailings-based alkali-activated gelling material and its application, and belongs to the field of preparation of inorganic functional materials. Background technique [0002] Cementitious material refers to the substance that can change from slurry to solid stone-like body under physical and chemical action, and can cement other materials to form a composite solid with certain mechanical strength. Cementitious materials have a long history of development, which can be traced back to ancient times. At that time, humans widely used clay in building piles. Clay is also considered to be the earliest cementitious material used in human society. At present, cementitious materials are mainly divided into two categories: hydraulic and non-hydraulic cementitious materials. The most significant difference between the two is whether they can perform and develop better strength in aqueous solution. ...

Claims

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Application Information

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IPC IPC(8): C04B7/21C04B7/14
CPCC04B7/21C04B7/14Y02P40/10
Inventor 侯浩波居辰轩王豪杰周旻汪懿
Owner 武汉大学(肇庆)资源与环境技术研究院