A comprehensive treatment method for tailings slurry containing cyanide

A comprehensive treatment and slurry technology, applied in sludge treatment, metallurgical wastewater treatment, water/sewage treatment, etc.

Active Publication Date: 2021-09-14
LIAONING TECHNICAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for filling and dry-draining cyanide-containing gold tailings, which can enhance the strength of the underground filling body, solve the problem of the source of the filling material aggregate, and improve the underground working environment , reduce the risk and intensity of downhole environmental pollution

Method used

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  • A comprehensive treatment method for tailings slurry containing cyanide
  • A comprehensive treatment method for tailings slurry containing cyanide
  • A comprehensive treatment method for tailings slurry containing cyanide

Examples

Experimental program
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Embodiment 1

[0048] A comprehensive treatment method for tailings slurry containing cyanide, the process flow chart is as follows figure 1 shown, including the following steps:

[0049] Step 1: Take the cyanide-containing tailings slurry discharged from the cyanidation gold extraction process, first filter and dehydrate it, put sodium metabisulfite into the cyanide-containing tailings slurry and fully stir to remove cyanide, and use slaked lime to adjust the pH of the reaction in real time To achieve the best cyanide removal effect, obtain water-containing tailings and extracted water. The water-containing tailings has a water mass ratio of 10%, a cyanide concentration of 5ml / L, and the extracted water is treated to remove the effects of gold leaching. The components are reused in the gold leaching process or discharged after removing cyanide and other pollutants in the water;

[0050] Step 2, filling the underground goaf with the water-containing tailings, the steps are as follows:

[0...

Embodiment 2

[0065] A comprehensive treatment method for tailings slurry containing cyanide, the process flow chart is as follows figure 1 shown, including the following steps:

[0066] Step 1, take the cyanide-containing tailings slurry discharged from the cyanide gold extraction process, first perform centrifugal dehydration on it, put sodium metabisulfite into the cyanide-containing tailings slurry and fully stir to remove cyanide, use slaked lime to adjust the pH of the reaction in real time to To achieve the best cyanide removal effect, obtain water-containing tailings and extracted water. The water-containing tailings have a water mass ratio of 30%, a cyanide concentration of 10ml / L, and the extracted water is treated to remove components that affect the effect of gold leaching It is reused in the gold leaching process or discharged after removing cyanide and other pollutants in the water;

[0067] Step 2, filling the underground goaf with the water-containing tailings, the steps ar...

Embodiment 3

[0072] A comprehensive treatment method for tailings slurry containing cyanide, the process flow chart is as follows figure 1 shown, including the following steps:

[0073] Step 1: Take the cyanide-containing tailings slurry discharged from the cyanide gold extraction process, first evaporate and dehydrate it, then put chlorine dioxide into the cyanide-containing tailings slurry and fully stir to remove cyanide, and use slaked lime to adjust the pH of the reaction in real time In order to achieve the best cyanide removal effect, obtain the water-containing tailings and the extracted water. The water-containing tailings has a water mass ratio of 50%, a cyanide concentration of 10ml / L, and the extracted water is treated to remove the effects of gold leaching. The components are reused in the gold leaching process or discharged after removing cyanide and other pollutants in the water;

[0074] Step 2, filling the underground goaf with the water-containing tailings, the steps are...

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Abstract

The invention provides a comprehensive treatment method for cyanide-containing tailings pulp. The steps are as follows: take the cyanide-containing tailings pulp, dehydrate and remove cyanide to obtain the water-containing tailings required by the corresponding parameters; Treatment of tailings: Method 1: Add cementitious materials to the water-containing tailings according to the ratio, mix them to make granules and maintain them, and use them as filling material aggregates, add mortar materials to them according to the ratio, and mix them evenly, so that the mortar materials will After the aggregate pores are filled and the flow dynamics are formed as a whole, it is filled into the goaf underground to form a filling body with a certain strength and good integrity; method 2: add cementitious materials or cohesive soil to the water-containing tailings according to the ratio, and mix well After granulation and curing, it is transported to the tailings pond for discharge. The treatment method of the present invention has the advantages of large amount of gold tailings utilization, flexible treatment mode, adjustable and controllable process index, safe treatment process and result, environmental protection, etc., and meets economic requirements at the same time.

Description

Technical field: [0001] The invention belongs to the technical field of tailings utilization and disposal, and in particular relates to a comprehensive treatment method for tailings slurry containing cyanide. Background technique: [0002] The cyanidation gold extraction process is the main method for extracting gold from ores or concentrates in modern times. The grade of gold ore is very low. In most cases, the ore contains only a few grams of gold per ton and the embedded particle size is very fine. Therefore, the cyanide gold extraction process produces a large amount of cyanide-containing tailings with very fine particles. The toxicity of cyanide is extremely strong, and a huge amount of fine-grained cyanide-containing tailings is very dangerous during transportation, discharge and storage. Therefore, cyanide-containing tailings slurry needs to be treated for cyanide removal after being discharged from the gold extraction process. [0003] One way to remove cyanide is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F11/00C04B18/02C04B28/02E21F15/00C02F101/18C02F103/16
CPCC02F1/00C02F1/52C02F11/00C02F2101/18C02F2103/16C04B18/021C04B28/02C04B2111/00724E21F15/00C04B18/08C04B18/12C04B18/10C04B22/145
Inventor 海龙隋淑梅苑兴伟梁国海刘强齐志超吴健王美蠲张巍瀛王景立孟凡康
Owner LIAONING TECHNICAL UNIVERSITY
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