GB362861A - Improvements in the recovery of values from cyanide solutions - Google Patents
Improvements in the recovery of values from cyanide solutionsInfo
- Publication number
- GB362861A GB362861A GB2682530A GB2682530A GB362861A GB 362861 A GB362861 A GB 362861A GB 2682530 A GB2682530 A GB 2682530A GB 2682530 A GB2682530 A GB 2682530A GB 362861 A GB362861 A GB 362861A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cyanide
- zinc
- solutions
- treated
- liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/08—Simple or complex cyanides of metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Solutions obtained in the treatment of ores by the cyanide process to extract their metal values, are treated with zinc sulphate while being maintained alkaline, a zinc cyanide precipitate and a cyanide free solution resulting. Alternatively, the cyanide solutions may be treated in the usual manner for the recovery of metal values, the residual cyanide liquors being treated as described above. Valuable metals, such as gold and part of the silver may be recovered from the cyanide free solutions by precipitation on metallic zinc preferably after the solutions have been rendered acid. The zinc cyanide precipitate which may contain the remainder of the silver and all the copper may be treated with an acid such as sulphuric acid to recover hydrocyanic acid and zinc sulphate for re-use, the valuable metals being recovered from the insoluble residue. In processes where the cyanide liquor is used cyclically, a portion of the liquor may be diverted and decyanided by the addition of zinc sulphate preferably at a point in the cycle after the normal precipitation of the gold and silver by the aid of zinc or the like, the cyanide free liquor after removal of its metal values by precipitation on metallic zinc being returned to the cycle if desired.ALSO:Solutions obtained in the treatment of ores by the cyanide process to extract their metal values, are treated with zinc sulphate while being maintained alkaline, a zinc cyanide precipitate and a cyanide free solution resulting. Alternatively, the cyanide solutions may be treated in the usual manner for the recovery of metal values, the residual cyanide liquors being treated as described above. Valuable metals, such as gold and part of the silver may be recovered from the cyanide free solutions by precipitation on metallic zinc preferably after the solutions have been rendered acid. In processes where the cyanide liquor is used cyclically, a portion of the liquor may be diverted and decyanided by the addition of zinc sulphate preferably at a point in the cycle after the normal precipitation of the gold and silver by the aid of zinc or the like, the cyanide free liquor after removal of its metal values by precipitation on metallic zinc being returned to the cycle if desired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2682530A GB362861A (en) | 1930-09-08 | 1930-09-08 | Improvements in the recovery of values from cyanide solutions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2682530A GB362861A (en) | 1930-09-08 | 1930-09-08 | Improvements in the recovery of values from cyanide solutions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB362861A true GB362861A (en) | 1931-12-08 |
Family
ID=10249839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2682530A Expired GB362861A (en) | 1930-09-08 | 1930-09-08 | Improvements in the recovery of values from cyanide solutions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB362861A (en) |
-
1930
- 1930-09-08 GB GB2682530A patent/GB362861A/en not_active Expired
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