Continuous Heavy Liquid Concentration of Spodumene.
Tippin RB; Browning JS; Llewellyn TO
NTIS: PB 192 030 :24 pages
To study continuous operation of the heavy liquid separation of minerals, the Bureau of Mines concentrated spodumene from a typical ore. The studies included heavy liquid concentration, removal of the heavy liquid from the mineral products, and recovery of the heavy liquid for reuse. The research program examined the influence of feed moisture, steam consumption, stripping time, and condition of steam. Operation of multiple cyclones in series resulted in spodumene concentrates assaying 92 to 95 percent spodumene and indicated mineral recoveries of 86 to 89 percent. Continuous filtration and steam stripping produced mineral products containing less than 1 pound of heavy liquid tetrabromoethane (tbe) per ton of material. Problems unique to this process are discussed, including heavy liquid properties and viscosity, toxicity, material handling hazards, and safety precautions.
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