Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1989-12-12
1992-03-17
Silverman, Stanley S.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209 11, 209166, 241 24, 241 78, B03D 102
Patent
active
050965719
ABSTRACT:
A process for recovering elemental sulfur from volcanic and non-volcanic ores is disclosed. Ore is processed by crushing the ore to a coarse particle size autoclaving to separate the sulfur from the ore, mild grinding to selectively reduce the size of the liberated sulfur particles, flotation and sulfur separation/filtration steps to produce a sulfur of at least 99% purity. The process recovers at least 90% of the elemental sulfur contained in the ore. The particular crushing of the ore and selective grinding techniques for reducing sulfur particles for reducing sulfur particles size are important factors in the efficiency of the process since the grinding techniques inhibit the formation of fine gangue which is difficult to separate from the liberated sulfur.
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Astley Vivian C.
Headington Thomas A.
Perez Jesus W.
Wiewiorowski Tadeusz K.
Womack James T.
Freeport McMoRan Resource Partners, Ltd. Partnership
Lithgow Thomas M.
Silverman Stanley S.
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