Abstract
For making the extraction of sulfur easier by removing harmful amphiphilic minerals from the surface of sulfur, a study was made on addition reagents.Effects of various addition reagents on each harmful mineral were tested in sealed glass tubes. The results are as follows:1) Few surface active agents, except some nonionic, were effective, while some higher fatty acids and alcohols exhibited a good effectiveness, 2) Several petroleum oils were effective to some extent, but neither aromatic hydrocarbon nor pine oil showed effectiveness.3) Very effective additions were obtained by mixing surface active agents with petroleum oils, and the author found that many harmful minerals were removed into water easily.Further, the results of extraction tests of flotation concentrates using autoclave showed that this mixed addition reagent was also most effective as in the case of the sealed tube tests.After a pilot test, this addition reagent was applied to industrial unit, making it possible to extract sulfur with a very high yield from the ores which hitherto seemed difficult to process.
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