Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Platinum group metal
Patent
1984-09-27
1986-09-16
Doll, John
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Platinum group metal
423 46, 423 88, C22B 108, C01G 2302
Patent
active
046121714
ABSTRACT:
The invention relates to an improvement in a method for recovering metal values from copper-containing and/or precious-metal containing materials which also contain antimony and/or bismuth in such high quantities as to render working-up of the materials with conventional metallurgical processes difficult or impossible. In accordance with the improvement, the material is subjected to a chlorination volatilization process in a manner to bring the antimony and/or bismuth content of the material to a predetermined low level acceptable for the continued working-up of the material in conventional process stages, while maintaining the metal values of the material in a substantially unaffected form. The volatilization process is best carried out at temperatures of between 450.degree. C. and 750.degree. C., preferably between 550.degree. C. and 650.degree. C.
The chlorination process can be carried out on materials included in the group: sulphidic or oxidic-ore concentrates, matte, speiss, oxidic and metallic intermediate products. In certain cases it is convenient to convert the material to another form within the group, for example the matte, prior to carrying out the chlorination process.
REFERENCES:
patent: 1107310 (1914-08-01), Johnson
patent: 3386815 (1968-06-01), Gorling et al.
patent: 4092152 (1978-05-01), Borbely
English translation of SE-A-830184-9.
R. Bloise et al., Advance in Extractive Metallurgy, 1977, London, IMM, pp. 53-56.
G. Morizot et al., Complex Sulphide Ores, The Inst. Min. and Metallurgy, 1978, pp. 151-158.
Imris et al., Advances in Extractive Metallurgy, 1977, The Inst. of Min. and Metallurgy, pp. 161-167.
H. W. Parsons, CIM Bulletin 71, Mar. 1978, pp. 196-204.
Boliden Aktiebolag
Doll John
Langel Wayne A.
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