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Method for comprehensive utilization of cyanide tailings and device

A technology for cyaniding tailings and tailings, which is applied in the direction of chemical instruments and methods, sulfur compounds, nitrogen and non-metallic compounds, etc., can solve the problems of low recycling rate of cyanided tailings and non-recycling, and achieve favorable Purification and reuse, enhanced strength, high-quality effects

Active Publication Date: 2018-05-11
GO HIGHER ENVIRONMENT GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the existing defects of low recycling rate of cyanide tailings and inability to fully recycle them, thereby providing a method and device for comprehensive utilization of cyanide tailings

Method used

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  • Method for comprehensive utilization of cyanide tailings and device
  • Method for comprehensive utilization of cyanide tailings and device
  • Method for comprehensive utilization of cyanide tailings and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment provides a method for comprehensive utilization of cyanide tailings, comprising the following steps:

[0060] Such as figure 1 as shown,

[0061] (1) mixing the cyanide tailings with water to prepare the first slurry whose mass concentration of the cyanide tailings is 40%;

[0062] Adding concentrated sulfuric acid with a mass concentration of 98% to the first slurry, adjusting the pH value of the first slurry to 4, and then adding water to dilute it into a second slurry with a mass concentration of cyanidation tailings of 30%;

[0063] The second slurry is transported to the flotation machine, and the amount of 400g butyl sodium xanthate is added to the second slurry per ton, and butyl sodium xanthate is added to the second slurry; 50g No. 2 oil is added to the second slurry per ton The amount, add No. 2 oil in the second slurry;

[0064] Use an air pump to ventilate the second slurry, and the flotation machine starts screening to obtain sulfur conce...

Embodiment 2

[0082] This embodiment provides a method for comprehensive utilization of cyanide tailings, comprising the following steps:

[0083] (1) mixing the cyanide tailings with water to prepare the first slurry whose mass concentration of the cyanide tailings is 50%;

[0084] Adding concentrated sulfuric acid with a mass concentration of 98% to the first slurry, adjusting the pH value of the first slurry to 5, and then adding water to dilute it into a second slurry with a mass concentration of cyanidation tailings of 30%;

[0085] Add 500g butyl sodium xanthate to the second slurry in the amount of 500g per ton of the second slurry, add butyl sodium xanthate to the second slurry; add 60g No. 2 oil to the second slurry in the amount of No. 2 Oil;

[0086] Ventilating into the second slurry, flotation to obtain sulfur concentrate with a sulfur content greater than or equal to 46% and tailings with a sulfur content less than 46%;

[0087] One-stage screening of tailings and three-stag...

Embodiment 3

[0105] This embodiment provides a method for comprehensive utilization of cyanide tailings, comprising the following steps:

[0106] (1) mixing the cyanide tailings with water to prepare the first slurry whose mass concentration of the cyanide tailings is 60%;

[0107] Adding concentrated sulfuric acid with a mass concentration of 98% to the first slurry, adjusting the pH value of the first slurry to 5, and then adding water to dilute it into a second slurry with a mass concentration of cyanidation tailings of 30%;

[0108] Add 450g butyl sodium xanthate to the second slurry in the amount of 450g per ton of the second slurry, add butyl sodium xanthate to the second slurry; add 55g No. 2 oil to the second slurry in the amount of 2 Oil;

[0109] Ventilating into the second slurry, flotation to obtain sulfur concentrate with a sulfur content greater than or equal to 46% and tailings with a sulfur content less than 46%;

[0110] (2) Preparation of sulfuric acid product:

[0111...

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Abstract

The invention provides a method for comprehensive utilization of cyanide tailings. According to the method, sulfur concentrates with the sulfur content greater than or equal to 46% are screened out, and sulfuric acid is prepared from the sulfur concentrates, so that the quality of the sulfuric acid is guaranteed; by mixing the tailings, fly ash and clay according to a specific ratio and carrying out roasting at high temperature, cyanide ions and organic agents contained in the tailings can be decomposed, and thus, the tailings are changed into non-toxic products; the tailings contain a small amount of sulfur during roasting, internal structures of ceramsite can have gaps along with the volatilization of the sulfur, and crystal forms are changed, so that the strength of the ceramsite is greatly improved. According to the method for the comprehensive utilization of the cyanide tailings, provided by the invention, the cyanide tailings are completely utilized while virulent cyanide ions are removed from the cyanide tailings, so that the method is environmentally friendly, the prepared ceramsite and sulfuric acid are excellent in quality, and huge economic benefit is brought.

Description

technical field [0001] The invention relates to the technical field of cyanide tailings treatment, and belongs to a method and a device for comprehensive utilization of cyanide tailings. Background technique [0002] Because of the high recovery rate of gold extraction by cyanidation, strong adaptability to ore, simple process operation, and low cost, it is widely used in the extraction of metal gold. The cyanidation method is mainly to place gold and silver ore in a cyanide (KCN or NaCN) solution, leaching the gold and silver in the ore with the cyanide solution, and then extracting the gold and silver from the leaching solution. Due to the use of cyanide solution in the leaching process, the cyanide tailings after gold and silver extraction contain not only a large amount of valuable elements Au, Ag, Fe, S, Cu, Pb, Zn, Sb, As, Si, but also Contains a large amount of highly toxic cyanide ions and residual chemicals. If it is directly landfilled or discarded, it will not o...

Claims

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Application Information

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IPC IPC(8): C04B33/138C04B33/13C04B28/14C01B17/79C04B38/06C01B21/096
CPCC01B17/79C01B21/096C04B28/14C04B33/13C04B33/138C04B38/0605C04B2111/00017C04B2235/656C04B2235/96C04B18/027C04B14/28C04B14/104C04B14/303C04B22/147Y02P40/60Y02P10/20
Inventor 陈福泰褚永前白立强
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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