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Removal of Magnesia from Dolomitic Southern Florida Phosphate Concentrates by Aqueous So2 Leaching.

Authors
Hansen-JP; Davis-BE; Llewellyn-TO
Source
MISSING :11 pages
Link
NIOSHTIC No.
10004536
Abstract
The Bureau of Mines has investigated the so2 leaching of mgo from high-mgo-bearing Florida phosphate concentrates. The so2 was effective in leaching some of the mgo from three phosphate concentrates; flow rate of the so2 and leach time were major factors in determing the amount of mgo leached. Calcining the samples, then grinding to minus 200 mesh, and elevating the leach temperature gave only small increases in the amount of mgo leached. The research also showed that some of the mgo was so intimately associated with the phosphate mineral that it could not be removed by so2 leaching. This amounted to about 0.6, 0.7, and 1.0 pct mgo in three leached residues. The calculated heads for the three concentrate samples averaged 1.4, 1.1, and 1.5 pct mgo, respectively, before leaching. This report is based upon work done under a memorandum of agreement between the Bureau of Mines, U.S. Department of the Interior, and the University of Alabama.
Publication Date
19850101
Document Type
IH; Report of Investigations
Fiscal Year
1985
NTIS Accession No.
NTIS Price
Identifying No.
RI 8953
NIOSH Division
TURC;
Source Name
MISSING
State
AL; FL;
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