GB266040A - Improvements relating to the extraction of precious metals from their ores and concentrates - Google Patents

Improvements relating to the extraction of precious metals from their ores and concentrates

Info

Publication number
GB266040A
GB266040A GB28762/25A GB2876225A GB266040A GB 266040 A GB266040 A GB 266040A GB 28762/25 A GB28762/25 A GB 28762/25A GB 2876225 A GB2876225 A GB 2876225A GB 266040 A GB266040 A GB 266040A
Authority
GB
United Kingdom
Prior art keywords
zinc
lead
ore
beads
metals
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
GB28762/25A
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.)
Mond Nickel Co Ltd
Original Assignee
Mond Nickel Co Ltd
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 Mond Nickel Co Ltd filed Critical Mond Nickel Co Ltd
Priority to GB28762/25A priority Critical patent/GB266040A/en
Publication of GB266040A publication Critical patent/GB266040A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

266,040. Mond Nickel Co., Ltd., and Atkinson, R. H. Nov. 14, 1925. Dry processes of extracting platinum group metals; desilverizing; alloys; treating ores to remove undesired constituents.-In a process for separating gold, silver and the metals of the platinum group from their ores, the finely crushed ore or concentrate is heated with lead and zinc to a temperature above the melting point of the zinc but below the sintering point of the ore. The process is carried out in a reducing or neutral atmosphere and ammonium chloride, or a mixture of chlorides, is added as a flux. Where sulphur is present in the ore, a preliminary roasting is preferably given. The beads of lead and zinc containing the precious metals are separated from the residue and are melted with more zinc or a zinc alloy e.g. an aluminium alloy, in a manner similar to Parkes' process for desilverizing lead. Should the original ore contain iron, the residue, after removal of the metal beads, is treated magnetically, the magnetic constituent being found to contain the major portion of the residual precious metals. In an example of the treatment of a concentrate of an ore containing gold and the metals of the platinum group, 70 parts by weight of the ore are mixed with 40 of lead, 1 of zinc, 1 of ammonium chloride, and 0.5 of charcoal. The mixture is heated at about 600‹ C. in a rotating tube furnace for about 16 hours. The metal beads, consisting mainly of lead, are separated by screening or washing and the residue magnetically treated. The strongly magnetic portion containing iron and platinum is treated for the separation of the platinum by any known method. The remainder of the residue is mixed with 30 parts by weight of lead, 1 of zinc, 1 of ammonium chloride and 0.5 of charcoal and the resultant beads separated. In an example of the treatment of the beads which in this case also contain silver, to 391 parts of the molten metal are added 90 parts of zinc, the surface being covered with charcoal. The mixture is maintained above the melting point of zinc at a maximum temperature of 500‹ C., being stirred every 15 minutes. On cooling, the zinc separates as a crust between 400‹ and 385‹ C. and at 350‹ C. the molten lead is run out, almost the whole of the precious metals being contained in the zinc. The lead is used for further separation.
GB28762/25A 1925-11-14 1925-11-14 Improvements relating to the extraction of precious metals from their ores and concentrates Expired GB266040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB28762/25A GB266040A (en) 1925-11-14 1925-11-14 Improvements relating to the extraction of precious metals from their ores and concentrates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28762/25A GB266040A (en) 1925-11-14 1925-11-14 Improvements relating to the extraction of precious metals from their ores and concentrates

Publications (1)

Publication Number Publication Date
GB266040A true GB266040A (en) 1927-02-14

Family

ID=10280732

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28762/25A Expired GB266040A (en) 1925-11-14 1925-11-14 Improvements relating to the extraction of precious metals from their ores and concentrates

Country Status (1)

Country Link
GB (1) GB266040A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841863A (en) * 1973-04-12 1974-10-15 Atomic Energy Commission Purification of platinum
WO1987001732A1 (en) * 1985-09-12 1987-03-26 Fine Metals Export Corporation Pty Limited Refining precious metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841863A (en) * 1973-04-12 1974-10-15 Atomic Energy Commission Purification of platinum
WO1987001732A1 (en) * 1985-09-12 1987-03-26 Fine Metals Export Corporation Pty Limited Refining precious metals

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