| 摘要 |
<p>More efficient collectors for recovering selected metal values and/or minerals using flotation processes are described in which the improved collectors are combinations of different reagents in which the different reagents are selected from combinations of thionocarbamates, dithiophosphates and mercaptobenzothiazoles in which the collectors are mixtures of reagents selected either containing members from the one group of reagents or from one or more other groups of reagents. Particularly preferred reagents forming the collectors are isopropylmethylthionocarbamate, isopropylethylthionocarbamate or isobutylethylthionocarbamate. Particularly preferred dithiophosphates are potassium di-isobutyl dithiophosphate and potassium di-secbutyl dithiophosphate. The collectors can be used to recover a range of metals and minerals, particularly gold, silver, zinc, lead, nickel, platinum from a range of raw materials including suphides and sulphidic ores, oxides, oxidized sulphides and similar. The collectors are used in flotation processes to increase the amount of recovery of the selected metal or mineral whilst reducing the amount of competing metals or minerals being recovered. An advantage of some members of the collectors is that they do not phase separate but rather can be used in combination without the need for stirring or agitation shortly before use.</p> |
