Abstract
Selective fatty acid flotation of carbonate gangue from sedimentary apatites was achieved under acidic pHs without a specific apatite depressant and without conditioning the pulp with the collector. Concentrates (35% to 38% P2O5, 0.8% to 1% MgO) with high recoveries (80% to 85%) were produced from Indian and Chinese dolomitic ores. The calcareous and/or dolomitic-siliceous phosphate ores of South Florida and Utah required two flotation stages: one for carbonate removal, as mentioned above, and the other for phosphate recovery from siliceous gangue. Preliminary tests on the South Florida ore gave concentrates analyzing 29% P2O5 and 0.8% MgO, with a P2O5 recovery of 76%. A concentrate obtained from the western US phosphate ore from Utah assayed 30% P2O5 and about 1% MgO, with a P2O5 recovery of 89%.
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SME preprint 87-60, SME-AIME Annual Meeting, Denver, CO, February 1987. MMP paper 87–614. Discussion of this paper must be submitted, in duplicate, prior to Jan. 31, 1988.
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Anazia, are minerals engineer and associate research professor, respectively, I., Hanna, J. New flotation approach for carbonate phosphate separation. Mining, Metallurgy & Exploration 4, 196–202 (1987). https://doi.org/10.1007/BF03402692
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DOI: https://doi.org/10.1007/BF03402692