Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1987-10-22
1989-02-14
Lacey, David L.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
210704, 423170, 252 61, B03D 102
Patent
active
048044610
ABSTRACT:
At present the usual method of recycling of drilling muds by the exclusive application of classifying processes during drilling rig operation leads to the disposal of fine grained barite containing waste materials. In this invention, a simple one-stage flotation process using alkylphosphate based collecting and foaming reagents is applied to recover the barite content of such muds thus producing a marketable barite concentrate. The flotation should preferably be carried out at pH 8 to 9 with CaO, Ca(OH).sub.2 or KOH as regulating reagents and with the optimal solids content in the flotation pulp (preferably 100 g/l). The solids content in the flotation pulp can easily be adjusted by diluting with process water.
REFERENCES:
patent: 2120217 (1938-06-01), Harris
patent: 2225973 (1940-12-01), Brown
patent: 2982401 (1961-05-01), Talbot
patent: 3122500 (1964-02-01), Gullett
patent: 4363724 (1982-12-01), Panzer
patent: 4456537 (1984-06-01), Oliver
patent: 4515699 (1985-05-01), Oliver
patent: 4528102 (1985-07-01), Oliver
"Recovery of Barite from Tailings Ponds and By Passed Mine Waste", by Sullivan and Lamont, Min. Eng. (33) 1981 1632-1634.
Lacey David L.
Lithgow Thomas M.
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