Easy Cyanide Detox Method - Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction - Metallurgist & Mineral Processing Engineer

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Easy Cyanide Detox Method (2 replies)

6 years ago

amressam 6 years ago

Hello I'm work in a mining company and use cyanide in the extraction process, I want an easy way to get rid of the cyanide resulting in tailing. Thank you

ericnera

6 years ago

ericnera 6 years ago

Use of sodium metabisulfite (SMBS) to detoxify cyanide is now common practice. There are a couple of articles here in 911metallurgist that will give you a good insight on the principles and how its done.

David

6 years ago

David 6 years ago

Hi https://www.911metallurgist.com/profile/ECD40/ sent this to me to give you.

INCO Treatment of Tailings Pulps or Slurries
The precious metals mining industry’s use of cyanide to extract precious metals from low grade ores is widespread. Cyanidation is the predominant method for precious metals beneficiation and is used on heap leaches or in tank operations to liberate precious metal values from remaining gangue in the ore. Several cyanide detoxification technologies have been developed to treat cyanidation wastes.

The International Nickel Company’s (INCO) sulfur dioxide/air process is one of two patented sulfur dioxide processes. The other process is patented by Noranda Inc. Both processes are similar with some limited differences in operating procedures.

The INCO process has been commissioned at more than 36 sites in North America. Ten sites are located in the U.S. and are listed in Table 1. Six of these 10 sites, use the INCO process to treat tailings prior to disposal. After treatment, tailings are typically disposed of in a tailings impoundment subject to zero discharge requirements under the Clean Water Act. In addition to Federal Clean Water Act standards, many states have solid waste-related discharge standards for the tailings prior to discharge to the tailings impoundment and the INCO treatment process is used to meet these State requirements.