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Beneficiation of Florida Dolomitic Phosphate Ores.

Authors
Llewellyn-TO; Davis-BE; Sullivan-GV
Source
Pres At SME-AIME Ann Meeting Atlanta, Georgia, 1983 :7 pages
Link
NIOSHTIC No.
10002867
Abstract
The Bureau of Mines conducted studies to recover phosphate from four dolomitic southern Florida deposits not currently mined. The samples contained 5.8 to 10.2 percent p2o5 and 1.7 to 4.8 percent mgo. Chemical analyses of sized fractions indicated that no pebble concentrate (plus 1.2 Mm) could be produced from these samples. A scheme was developed that consisted of desliming, grinding, scrubbing, and redesliming the ore to produce a flotation feed. Conventional one-step fatty acid-fuel oil batch flotation tests on the samples resulted in concentrates containing 29.0 to 31.3 percent p2o5 at flotation recoveries ranging from 72.4 to 96.1 percent of the flotation feed. The mgo content of the concentrates ranged from 0.47 to 1.36 percent. Continuous flotation of the Manatee No. 2 Sample indicated that commercial-grade phosphate concentrates analyzing 31.3 percent p2o5 and 0.55 percent mgo could be produced with a flotation recovery of 89.9 percent. The mgo content of concentrates obtained from the Manatee No. 1 and Hardee samples was 1.20 to 1.36 percent, respectively. Leaching with aqueous so2 reduced the mgo content of these phosphate concentrates to 0.5 And 0.8 percent, but with a concomitant loss in phosphate recovery.
Publication Date
19830101
Document Type
OP;
Fiscal Year
1983
NTIS Accession No.
NTIS Price
Identifying No.
OP 28-83
NIOSH Division
TURC;
Source Name
Pres. At SME-AIME Ann. Meeting, Atlanta, Georgia, 1983, Soc. Min. Eng. AIME Preprint 83-10
State
FL; GA;
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