Abstract
The most widespread method in gold production is cyanide leaching of ore concentrates. Most of gold ore deposits in the Russian Federation are located in the Far North and Far East with their climate zone characterized by a positive water balance. In this regard, there arises a need to solve the problem of wastewater treatment. The process of cyanide removal is well known and proven in an industrial scale. The presence of nonferrous metal sulfides and iron in ore concentrates leads to an increased consumption of cyanides caused by thiocyanate production. As a result, gold mining companies have to solve the problem of neutralization of discharged water both in terms of cyanide and thiocyanates. The problem is currently particularly burning at Russia’s operations as requirements for cyanide and thiocyanate contents in treated effluents are virtually commensurate. This present paper summarizes the results of research in the field of treatment of wastewater containing, along with cyanides, a significant amount of thiocyanates. Our studies have shown high efficiency of the process of wastewater oxidation by ozone. It has been shown that the ozone oxidation process runs at high rate and is accompanied by cyanide regeneration. This saves more than fifty percent on the cost of ozone production, the latter being a major economic limiting factor for the application of this technology. The ozonation technology ensures the absence of secondary contamination by reagents and treated effluent intermediates. The developed method provides the compliance with the legislation requirements on the content of cyanides and thiocyanates in wastewater. Lower cost of the process resulted from the lack of reagents, and hence, cost of their purchase and delivery to gold mining operations, and a potential for cyanide regeneration make a proposed method very attractive. Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Обычная таблица; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0cm; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:Calibri,sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Siberian Federal University. Engineering & Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
