Method for preparing active mixing material by mine tailing

A technology of active mixed materials and tailings, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of low comprehensive utilization rate of tailings, high production cost, complex comprehensive utilization process, etc. Achieve important environmental benefits and economic benefits, increase added value, and make the preparation process simple and easy

Active Publication Date: 2016-11-09
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical deficiencies such as the low comprehensive utilization rate of tailings, complex comprehensive utilization process and high production cost, the present invention proposes a kind of active compound for concrete that uses tailings as raw material, adds an activator, and adopts a mechanical-chemical activation process. Mixed materials not only increase the added value of tailings, but also truly realize the overall utilization of tailings, and open up the application field of tailings

Method used

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  • Method for preparing active mixing material by mine tailing
  • Method for preparing active mixing material by mine tailing
  • Method for preparing active mixing material by mine tailing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh the tailings and activator according to the weight percentage, weigh 3.5kg of tailings; take the quality of tailings as the basis, add 0.015% polyolamine type macromolecule, 0.2% water glass and 0.005% organic glycol , the activator was added in the form of aqueous solution. A mill is used to grind the tailings, and the grinding time is 20 minutes to obtain the tailings active mixture.

[0024] The cement used is P.O52.5 ordinary Portland cement with a specific surface area of ​​357m 2 / Kg.

[0025] According to the percentage by weight, the tailings fine powder is uniformly proportioned with P.O52.5 cement according to 30%. According to GB / T17671-2005 "Cement Mortar Strength Test Method" (ISO method), cement mortar test blocks were prepared, and according to GB / T12957-2005 "Industrial Waste Residue Activity Test Method for Cement Mixtures", it was concluded that tailings were used as Activity test results of cement active admixture under different conditions. ...

Embodiment 2

[0030] 1. Weigh 3.5kg of tailings and activator according to the weight percentage; take the quality of tailings as the basis, add 0.02% polyolamine polymer, 0.4% water glass and 0.02% organic Glycol. A mill is used to grind the tailings, and the grinding time is 50 minutes to obtain the tailings active mixture.

[0031] 2. The cement used is P.O52.5 ordinary Portland cement with a specific surface area of ​​357m 2 / Kg.

[0032] 3. According to the percentage by weight, the tailings fine powder is uniformly proportioned with P.O52.5 cement by 30%. Prepare cement mortar test blocks according to GB / T17671-2005 "Cement Mortar Strength Test Method" (ISO method), and according to GB / T12957-2005 "Test Method for Activity of Industrial Waste Slag Used in Cement Mixtures", it is concluded that tailings are used as Activity test results of cement active admixture under different conditions. The test results are shown in Table 2.

[0033] Table 2 tailings used as cement admixture a...

Embodiment 3

[0036] 1. Weigh 3.5kg of tailings and activator according to the weight percentage; based on the quality of tailings, add 0.03% polyolamine polymer, 0.3% water glass and 0.01% organic Glycol. A mill is used to grind the tailings, and the grinding time is 30 minutes to obtain the tailings active mixture.

[0037] 2. The cement used is P.O52.5 ordinary Portland cement with a specific surface area of ​​357m 2 / Kg.

[0038] 3. According to the percentage by weight, the tailings fine powder is uniformly proportioned with P.O52.5 cement by 30%. Prepare cement mortar test blocks according to GB / T17671-2005 "Cement Mortar Strength Test Method" (ISO method), and according to GB / T12957-2005 "Test Method for Activity of Industrial Waste Slag Used in Cement Mixtures", it is concluded that tailings are used as Activity test results of cement active admixture under different conditions. The test results are shown in Table 3.

[0039] Table 3 tailings used as cement admixture activity t...

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Abstract

The invention discloses a method for preparing an active mixing material by mine tailing. The method comprises the following steps: 1) uniformly mixing mine tailing, controlling the dried mine tailing at 1% and below; 2) preparing an exciting agent to a solution with certain concentration by deionized water; wherein the exciting agent is poly(alcohol amine) macromolecule and organic ethylene glycol and soluble glass or sodium silicate; mass percentage concentration of the poly(alcohol amine) macromolecule is 5-20%, the mass percentage concentration of ethylene glycol is 5-20%, and the mass percentage concentration of soluble glass or sodium silicate is 20-60%; and 3) weighing a certain amount of mine tailing, by taking the mass of the mine tailing as a reference, the addition amount of the exciting agent comprises: 0.01-0.06% of poly(alcohol amine) macromolecule, 0.005-0.02% of organic ethylene glycol, and 0.2-0.5% of soluble glass or sodium silicate, and employing a grinding machine for grinding mine tailing to obtain the mine tailing active mixing material.

Description

technical field [0001] The invention belongs to the fields of development and utilization of non-metallic ores and inorganic non-metallic materials, and in particular relates to a method for preparing active mixed materials from tailings. Background technique [0002] Tailings are the main component of industrial solid waste. Over 10 billion tons of metal mines, non-metal mines, coal, clay, etc. are extracted every year by countries all over the world, and the amount of tailings discharged is about 5 billion tons. Taking the accumulated tailings of non-ferrous metal mines as an example, the United States has reached 8 billion tons. t, the former Soviet Union was 4100 million m 3 . At present, there are more than 150 kinds of minerals discovered in my country, more than 8,000 mines have been developed and established, and the cumulative production of tailings is 5.97 billion tons, and it is still growing at a rate of 300 million tons every year. [0003] Tailings have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B18/12
CPCC04B18/12C04B20/023Y02W30/91
Inventor 匡敬忠
Owner JIANGXI UNIV OF SCI & TECH
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