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Hydrophobic effects of sulfur and xanthate on metal and mineral surfaces.

Authors
Walker-GW; Walters-CP; Richardson-PE
Source
Int J Miner Process 1986 Sep; 18(1-2):119-137
NIOSHTIC No.
10005401
Abstract
The hydrophobic character of a variety of base-metal sulfides and gold has been examined in the presence of sodium hydrosulfide and potassium ethylxanthate. The degree of hydrophobicity induced by electrodeposition of sulfur and by electrochemical reaction between the minerals and ethylxanthate were determined by contact-angle measurements on polished surfaces and by flotation of mineral particles. During flotation, mineral-reagent interactions were followed by monitoring the solution composition spectrophotometrically. Results have shown that on gold and chalcopyrite the oxidation of hydrosulfide to molecular sulfur and the oxidation of ethylxanthate to dixanthogen produced hydrophobic surfaces; on pyrite, sulfur deposition was more effective than dixanthogen in producing a hydrophobic surface. Chalcocite, in contrast to gold, chalcopyrite, and pyrite, was found to react directly with ethylxanthate and hydrosulfide, but only the metal xanthate product was hydrophobic.
CODEN
IJMPBL
Publication Date
19860901
Document Type
OP; Journal Article
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Identifying No.
OP 149-86
Issue of Publication
1-2
ISSN
0301-7516
NIOSH Division
AVRC
Source Name
International Journal of Mineral Processing
State
MD
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