Improvements in or relating to the concentration of metalliferous ores by flotation

摘要

534,983. Concentrating ores. MINERALS SEPARATION. Ltd. Sept. 22, 1939, No. 26469. Convention date, Sept. 24, 1938. [Class 82 (ii)] A flotation agent for the concentration of metalliferous ores comprises one or more organic compounds of the thiophane series having the general formula Cn H .n S. The organic compound may have an alkyl group attached to the ring of sulphur and carbon atoms and may be mixed with liquefied hydrocarbons derived from or occurring in petroleum ores or used with other reagents used in flotation processes such as frothers, pH regulators on depressors. Examples of the treatment of copper lead and zinc ores with tetramethylene sulphides pentamethylene sulphide or alpha methyl pentamethylene sulphide with or without additions such as pine oil, cresylic acid and copper sulphate are referred to.