Low cost on-site on-demand cyanide production for gold mining (2013–2016)
We propose to develop a novel thermal plasma based technology for producing cyanide solution suitable for gold production plant. The process has significant advantages over current large scale, centralised cyanide production. Importantly, production on demand will eliminate mine site storage requirements, and bulk transportation of hazardous material to (often remote and insecure) mine sites. A key advantage is use of air instead of ammonia as the nitrogen source, natural gas or LPG as the carbon and hydrogen sources and caustic soda as the only feed materials. This simplifies the process, reduces costs and environmental footprint, being essentially zero environmental discharge.