Cyanide waste water recovery treatment method

A technology for cyanide wastewater and wastewater, which is applied in the field of recycling and treatment of cyanide-containing wastewater, can solve the problems of ineffective treatment of heavy metal ions, excessive waste residue, secondary pollution, etc., and achieves easy industrial application, simple process flow, and system operation. stable effect

Active Publication Date: 2015-03-25
CHANGCHUN GOLD RES INST
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the use of cyanidation gold extraction process in the production process of gold production enterprises, a large amount of cyanide-containing wastewater will be produced. These wastewater not only contain a large amount of highly toxic cyanide, but also contain thiocyanate and copper, zinc, lead, etc. If the heavy metal ions are not treated effectively, there will be a major environmental hazard
At present, the methods commonly used at home and abroad to treat cyanide-containing wastewater include acidification recovery method, alkali chlorine method, Inco method, sulfur dioxide method, etc. Although a certain amount of cyanide can be recovered by using acidification recovery method, due to the incomplete recovery of cyanide, the waste water A certain amount of cyanide will remain in the medium, and at the same time, thiocyanate and some heavy metal ions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific example 1

[0028] Cyanide-containing wastewater from a gold mine, pH 10.8, CN T 657.26mg / L, SCN — 176.56mg / L, Cu 2+ 123.42mg / L, Fe 3+ The COD is 48.45mg / L, and the COD is 870.28mg / L. In addition, it also contains trace amounts of other heavy metal ions. Pump 5L of cyanide-containing wastewater into the resin adsorption column for adsorption treatment. The resin adsorption column is filled with strong basic anion adsorption resin. The wastewater adsorption residence time is 2 hours. The adsorbed wastewater is placed in the advanced oxidation treatment device. The advanced oxidation treatment device There is a ceramic microporous aerator at the bottom of the interior, and a dosing tube on the upper part. Add 20mL of 30% hydrogen peroxide solution to the advanced oxidation treatment device, turn on the ozone generator, and pass ozone through the ceramic microporous aerator for 30 minutes. The amount of ozone introduced is 450mg. After the reaction is over, the ozone is stopped, the waste...

specific example 2

[0030] A gold mine contains cyanide, pH is 10.2, CN T 365.42mg / L, SCN — 123.78mg / L, Cu 2+ 25.43mg / L, Fe 3+ 57.55mg / L, Zn 2+ It is 14.43mg / L, COD is 498.69mg / L, and also contains trace amounts of other heavy metal ions. Pump 5L of cyanide-containing wastewater into the resin adsorption column for adsorption treatment. The resin adsorption column is filled with strong basic anion adsorption resin. The wastewater adsorption residence time is 2 hours. The adsorbed wastewater is placed in the advanced oxidation treatment device. The advanced oxidation treatment device There is a ceramic microporous aerator at the bottom of the interior, and a dosing tube on the upper part. Add 20mL of 30% hydrogen peroxide solution and 1mL of 5% copper sulfate solution to the advanced oxidation treatment device, turn on the ozone generator, and aerate from the ceramic microporous The ozone was passed into the gas tank for 30 minutes, and the amount of ozone introduced was 350 mg. After the reac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a cyanide waste water recovery treatment method. The method is composed of a resin adsorption method, an advanced oxidation process, a coagulant-sedimentation method and an active carbon adsorption method. When cyanide waste water is treated, firstly, resin is selected and used for adsorbing and recovering cyanide in the waste water, an oxidizing agent and a catalyst are added to the adsorbed waste water for advanced oxidation treatment, coagulant-sedimentation is conducted on the oxidized waste water so as to remove pollutants such as suspended particulate matter and heavy metal ions in the waste water, active carbon adsorption is conducted on supernate obtained after sedimentation, and therefore remaining pollutants in the waste water are removed. According to the characteristics that the concentration of cyanide in the cyanide waste water generated in the gold production process is high, pollutant types are complex, and the pollutants are difficult to treat, the resin adsorption method, the advanced oxidation process, the coagulant-sedimentation method and the active carbon adsorption method are combined together to collaboratively conduct deep treatment on the cyanide waste water, the cyanide waste water recovery treatment method has the advantages of being good in treatment effect, high in treatment efficiency, stable in system operation, simple in technological process, capable of facilitating industrial application and the like, and the treated waste water can return to the production technological process and serve as reuse water to be used or can be drained when reaching the standard.

Description

technical field [0001] The invention relates to a method for treating pollutants in the field of environmental protection, in particular to a method for recycling and treating cyanide-containing wastewater. Background technique [0002] Due to the use of cyanidation gold extraction process in the production process of gold production enterprises, a large amount of cyanide-containing wastewater will be produced. These wastewater not only contain a large amount of highly toxic cyanide, but also contain thiocyanate and copper, zinc, lead, etc. If the heavy metal ions are not treated effectively, there will be a major environmental hazard. At present, the methods commonly used at home and abroad to treat cyanide-containing wastewater include acidification recovery method, alkali chlorine method, Inco method, sulfur dioxide method, etc. Although a certain amount of cyanide can be recovered by using acidification recovery method, due to the incomplete recovery of cyanide, the wast...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F9/04
CPCC02F1/283C02F1/285C02F1/52C02F1/725C02F9/00C02F2101/18C02F2103/16
Inventor 刘强李哲浩卢楠
Owner CHANGCHUN GOLD RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap