GB451979A - Improvements in or relating to the recovery of precious metals from ores or preciousmetal bearing deposits - Google Patents

Improvements in or relating to the recovery of precious metals from ores or preciousmetal bearing deposits

Info

Publication number
GB451979A
GB451979A GB1415235A GB1415235A GB451979A GB 451979 A GB451979 A GB 451979A GB 1415235 A GB1415235 A GB 1415235A GB 1415235 A GB1415235 A GB 1415235A GB 451979 A GB451979 A GB 451979A
Authority
GB
United Kingdom
Prior art keywords
solution
ores
bisulphite
precious metals
preciousmetal
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
Application number
GB1415235A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merrill Co
Original Assignee
Merrill Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Merrill Co filed Critical Merrill Co
Priority to GB1415235A priority Critical patent/GB451979A/en
Publication of GB451979A publication Critical patent/GB451979A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/08—Obtaining noble metals by cyaniding

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Precious metals are recovered from ores by extraction with dilute alkaline cyanide solution, subjecting the solution to a conditioning operation which renders the solution capable of actively reacting with a metallic precipitant, deoxides the solution, and neutralizes alkalinity to an extent sufficient to afford a pH value of from 6-8,4, and then contacting the solution with a metallic precipitant such as zinc or iron. The conditioning operation may comprise the addition of sodium or calcium bisulphite, sulphur or carbon dioxides, either singly or in combination, a suitable source of mixed dioxides being flue-gas. Before the addition of bisulphite, the solution may be neutralized with sulphuric acid and the bisulphite may be formed by interaction between the alkali or alkaline earth ion in the solution and sulphurous acid. Reference has been directed by the Comptroller to Specification 442,315.
GB1415235A 1935-05-14 1935-05-14 Improvements in or relating to the recovery of precious metals from ores or preciousmetal bearing deposits Expired GB451979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1415235A GB451979A (en) 1935-05-14 1935-05-14 Improvements in or relating to the recovery of precious metals from ores or preciousmetal bearing deposits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1415235A GB451979A (en) 1935-05-14 1935-05-14 Improvements in or relating to the recovery of precious metals from ores or preciousmetal bearing deposits

Publications (1)

Publication Number Publication Date
GB451979A true GB451979A (en) 1936-08-14

Family

ID=10035957

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1415235A Expired GB451979A (en) 1935-05-14 1935-05-14 Improvements in or relating to the recovery of precious metals from ores or preciousmetal bearing deposits

Country Status (1)

Country Link
GB (1) GB451979A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990010721A1 (en) * 1989-03-07 1990-09-20 Dean Robert Butler Recovery of gold, silver and platinum group metals with various leachants at low pulp densities

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990010721A1 (en) * 1989-03-07 1990-09-20 Dean Robert Butler Recovery of gold, silver and platinum group metals with various leachants at low pulp densities
GB2248631A (en) * 1989-03-07 1992-04-15 Dean Robert Butler Recovery of gold, silver and platinum group metals with various leachants at low pulp densities
GB2248631B (en) * 1989-03-07 1993-06-09 Dean Robert Butler Recovery of gold, silver and platinum group metals with various leachants at low pulp densities

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