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A kind of treatment method of cyanidation gold extraction wastewater

A treatment method and wastewater technology, applied in the field of resource utilization of hazardous waste, can solve the problems of excessive heavy metals and cyanide in wastewater, large consumption of oxidants, serious equipment corrosion, etc., achieve high removal rate of heavy metals, simple wastewater treatment process, The effect of a wide range of raw material sources

Active Publication Date: 2022-03-08
KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical oxidation method has the problems of large consumption of oxidant and incomplete oxidation of cyanide
The comprehensive recovery method has problems such as the need to add a large amount of metal ions, the treatment depth of cyanide-containing wastewater is not enough, and the solid waste needs secondary treatment.
The regeneration method can effectively separate metal ions and cyanide, so as to realize the efficient recovery of cyanide, but this method severely corrodes the equipment and the heavy metal and cyanide in the treated wastewater exceed the standard and cannot meet the discharge standard

Method used

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  • A kind of treatment method of cyanidation gold extraction wastewater
  • A kind of treatment method of cyanidation gold extraction wastewater
  • A kind of treatment method of cyanidation gold extraction wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Effect of solid-to-liquid ratio of sodium silicate and hydrochloric acid solution on the performance of the prepared flocculant

[0021] According to the solid-to-liquid ratio of sodium silicate and hydrochloric acid solution 5:100g / mL, 7:100g / mL, 9:100g / mL, 10:100g / mL, 20:100g / mL, 30:100g / mL, 32:100g / mL Weigh sodium silicate and hydrochloric acid solution at mL, 35g / mL, and 40:100g / mL respectively, mix and stir until the sodium silicate is completely dissolved to obtain a silicon-based acid solution, wherein the mass fraction of hydrochloric acid in the hydrochloric acid solution is 10%. According to the solid-liquid ratio of aluminum chloride and cyanide gold extraction wastewater of 5:100g / mL, aluminum chloride and cyanide gold extraction wastewater were weighed, mixed, and stirred until the aluminum chloride was completely dissolved to obtain cyanide gold extraction aluminum-containing wastewater. Measure the silicon-based acid solution and the aluminum-co...

Embodiment 2

[0030] Example 2 Effect of solid-liquid ratio of aluminum chloride and cyanidation gold extraction wastewater on the performance of the prepared flocculant

[0031] Take sodium silicate and hydrochloric acid solution respectively according to the solid-to-liquid ratio of sodium silicate and hydrochloric acid solution 30:100g / mL, mix, stir until sodium silicate dissolves completely, obtain silicic acid solution, wherein the mass fraction of hydrochloric acid in the hydrochloric acid solution is 20%. According to the solid-liquid ratio of aluminum chloride and cyanide gold extraction wastewater 2.5:100g / mL, 3.5:100g / mL, 4.5:100g / mL, 5:100g / mL, 10:100g / mL, 15:100g / mL, 15.5 : 100g / mL, 16.5: 100g / mL, 17.5: 100g / mL respectively weigh aluminum chloride and cyanide gold extraction wastewater, mix, stir until aluminum chloride is completely dissolved, and obtain cyanide gold extraction aluminum-containing wastewater. Measure the silicon-based acid solution and the aluminum-containing ...

Embodiment 3

[0036] Example 3 Effect of the volume ratio of silicon-based acid solution and aluminum-containing wastewater from cyanidation gold extraction on the performance of the prepared flocculant

[0037] Take sodium silicate and hydrochloric acid solution respectively according to the solid-to-liquid ratio of sodium silicate and hydrochloric acid solution 30:100g / mL, mix, stir until sodium silicate dissolves completely, obtain silicic acid solution, wherein the mass fraction of hydrochloric acid in the hydrochloric acid solution is 30%. According to the solid-liquid ratio of aluminum chloride and cyanide gold extraction wastewater of 15:100g / mL, aluminum chloride and cyanide gold extraction wastewater were weighed, mixed, and stirred until the aluminum chloride was completely dissolved to obtain cyanide gold extraction aluminum-containing wastewater. According to the volume ratio of silicon-based acid solution and cyanidation gold extraction aluminum-containing wastewater 0.25:1, 0....

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Abstract

The invention discloses a treatment method for cyanidation gold extraction wastewater. The silicon-based acid solution is prepared by using sodium silicate and hydrochloric acid solution; the cyanide gold extraction aluminum-containing wastewater is prepared by using aluminum chloride and cyanide gold extraction wastewater; Acid solution and cyanide gold-extracting aluminum-containing wastewater to prepare cyanide-extracted gold-containing silicon-aluminum acidic water; low-temperature plasma irradiation is carried out on cyanide-extracted gold-containing silicon-aluminum acidic water to obtain polysilicon-aluminum precursor solution; polysilicon-aluminum precursor solution The bulk solution is irradiated with low-temperature plasma to obtain a silicon-based flocculant. The waste water treatment process of the present invention is simple, and the sources of required raw materials are extensive. The minimum total cyanide content in the flocculant prepared by using cyanidation gold extraction waste water is only 0.04 mg / kg, and the flocculant prepared at the same time is applicable to water with pH=1-13 Environment, heavy metal removal rate is high, the highest can realize the removal of 99% lead, 98% mercury, 98% cadmium, 99% zinc, 99% copper in the simulated liquid, it is very important to solve the problems existing in the current cyanide gold extraction wastewater treatment process Especially critical.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for cyanidation gold extraction wastewater, and belongs to the field of resource utilization of hazardous waste. Background technique [0002] Cyanide gold extraction has the characteristics of high gold leaching rate and low equipment requirements, and is one of the most commonly used methods for gold extraction in gold mines. However, a large amount of toxic and harmful waste liquid is likely to be produced in the process of cyanidation gold extraction, which is difficult to deal with and will easily cause serious pollution to the soil and water around the mining area. Recycling within the system is currently a guiding method to reduce the environmental hazards of cyanide-containing wastewater in the process of gold mining and separation and smelting. In the short term, the internal circulation of the system can effectively avoid large-scale improper discharg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/48C02F1/56C02F101/20C02F103/16
CPCC02F1/48C02F1/56C02F2101/20C02F2103/16
Inventor 黄涛宋东平张克骆礼兵藏颖王莹邓锦涛苏治宇
Owner KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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