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Cyanidation tailing solidification agent and application of solidification agent

A technology for cyanidation tailings and curing agent, applied in the field of curing agent for cyanide tailings and hazardous solid waste curing treatment, can solve the problems of high cost and difficult composition of curing agent, achieve good curing effect, improve curing and stability Control effect, promote dispersion effect

Active Publication Date: 2017-12-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned curing agent has complex composition and high cost, which is difficult to be accepted by users.

Method used

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  • Cyanidation tailing solidification agent and application of solidification agent
  • Cyanidation tailing solidification agent and application of solidification agent
  • Cyanidation tailing solidification agent and application of solidification agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In terms of parts by mass, Table 1 shows the components of the cyanide tailings curing agent and the ratio of the curing agent to the cyanide tailings solidified body.

[0045] Table 1

[0046]

[0047] Applying the cyanide tailings curing agent to solidify the cyanide tailings comprises the following steps:

[0048] (1) Dissolve 26 parts of magnesium sulfate, 0.5 parts of pure acrylic emulsion, 1.0 part of calcium lignosulfonate and 60 parts of water in a stirring container, mix and stir for 2 minutes to obtain a mixed solution;

[0049] (2) 100 parts of cyanide tailings are added in the stirring vessel and mixed with the mixed solution obtained in step (1) and then stirred, the stirring time is 20min, and the mixed slurry is obtained;

[0050] (3) Add 50 parts of light-burned magnesium oxide into the mixed slurry obtained in step (2) and mix, continue to stir, and the stirring time is 8min to obtain the mixed material;

[0051] (4) The mixture obtained in step (3...

Embodiment 2

[0054] In terms of parts by mass, Table 2 shows the components of the cyanide tailings curing agent and the ratio of the curing agent to the cured cyanide tailings body.

[0055] Table 2

[0056]

[0057] Applying the cyanide tailings curing agent to solidify the cyanide tailings comprises the following steps:

[0058] (1) Dissolve 15 parts of magnesium sulfate, 0.3 parts of pure acrylic emulsion, 0.4 parts of polycarboxylate water reducer and 45 parts of water in a stirring container, and mix and stir for 2 minutes to obtain a mixed solution;

[0059] (2) 100 parts of cyanide tailings are added in the stirring vessel and mixed with the mixed solution obtained in step (1) and then stirred, the stirring time is 20min, and the mixed slurry is obtained;

[0060] (3) Add 20 parts of light-burned magnesium oxide into the mixed slurry obtained in step (2) and mix, continue to stir, and the stirring time is 8min to obtain the mixed material;

[0061] (4) Place the mixture obtain...

Embodiment 3

[0064] In terms of parts by mass, Table 3 shows the components of the cyanide tailings curing agent and the ratio of the curing agent to the cyanide tailings solidified body.

[0065] table 3

[0066]

[0067] Applying the cyanide tailings curing agent to solidify the cyanide tailings comprises the following steps:

[0068] (1) Dissolve 25 parts of magnesium chloride, 0.5 parts of styrene-acrylic emulsion, 0.4 parts of polycarboxylate water reducer and 50 parts of water in a stirring container, and mix and stir for 3 minutes to obtain a mixed solution;

[0069] (2) 100 parts of cyanide tailings are added in the stirring container and mixed with the mixed solution obtained in step (1) and then stirred, and the stirring time is 25min to obtain the mixed slurry;

[0070] (3) Add 40 parts of brucite powder into the mixed slurry obtained in step (2) and mix, continue to stir, and the stirring time is 7.5min to obtain the mixed material;

[0071] (4) Place the mixture obtained ...

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Abstract

The invention relates to a cyanidation tailing solidification agent and an application of the solidification agent. The cyanidation tailing solidification agent comprises the following components in parts by mass: 50-70 parts of magnesium ore powder, 30-50 parts of a soluble magnesium salt, 0-10 parts of a polymer emulsion and 0-5 parts of an admixture. The solidification agent provided by the invention can motivate self cementation solidification of inactive cyanidation tailings, and also provides solidification strength which is high enough. A solidification body formed by combination with the cyanidation tailings has a compact structure, and pollutants of CN<-> and heavy metals are controlled by solidification and stabilization, so that the leaching rate meets the relative requirements of national standards. The solidification agent provided by the invention has less doping amount, employs cheap raw materials, decreases the solidification cost of the cyanidation tailings, is suitable for industrialized production, and has good economic benefits and wide application prospects.

Description

technical field [0001] The invention relates to the technical field of solidification treatment, in particular to the technology of solidification treatment of hazardous solid waste, in particular to a cyanide tailings solidification agent and its application. Background technique [0002] Cyanide tailings are metallurgical wastes containing acidic, alkaline, toxic, radioactive or heavy metal components produced by the cyanidation gold extraction process in the gold smelting process. The cyanidation-based production process produces 25,000-30,000 tons of cyanide slag to produce 1 ton of gold. The annual discharge of cyanide slag is as high as 5 million tons, and maintains an increase of more than 10%. It is the largest industrial solid waste in my country's gold industry. In addition to low-grade gold and silver, cyanide tailings also contain a certain amount of valuable elements such as Fe, S, Cu, Pb, Zn, Sb, and Si. Although the properties, types, and contents of valuable...

Claims

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Application Information

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IPC IPC(8): C04B28/30C04B28/32
CPCC04B28/30C04B28/32C04B22/142C04B24/2641C04B24/18C04B22/002C04B18/144C04B22/066C04B7/153C04B24/24C04B22/124
Inventor 陈运法叶树峰涂玉波魏连启仉小猛付国燕于博
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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