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Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Stowasser, W.F.
Phosphate rock,   pp. 1027-1041 ff. PDF (1.6 MB)


Page 1029

 PHOSPHATE ROCK 1029 
DOMESTIC PRODUCTION 
 Domestic production of marketable phosphate rock was 40,831,000 ' tons,
a 5% increase over that of 1971. The value of the marketable rock was $207,910,000,
a 2% increase over that of 1971. The average grade of phosphate ore mined
in the United States was 14.7% P205, and the average grade of marketable
rock was 31.4% P205. The average weight recovery of concentrate and marketable
rock as mined was 32.2%, and the P205 recovery averaged 
69.2%. Of the total production in the United States, Florida and North Carolina
produced 34,121,000 tons (83.5%), the Western States produced 4,555,000 tons
(lL2%), and Tennessee produced 2,154,000 tons (5.3%) - 
 Florida and North Carolina.—Production of marketable phosphate rock
was 34,121,000 tons, an increase over that of 
1971 of 1,970,000 tons, or 6.1%. The value of marketable rock increased to
$173,910,000, an increase over that of 1971 of $6,157,000, or 3.7%. 
 The average' grade of phosphate ore mined was 13.9% P205, and ' the average
grade of marketable rock was 32.2% P205. The average weight recovery of concentrate
and marketable rock as mined was 29.1%, and the average P205 recovery was
67.4%. 
 Companies operating in the Florida land-pebble phosphate fields were Agrico
Chemical Co., Borden Chemical Co., Brewster Phosphates, Cities Service Co.,
W. 
R. Grace & Co., International Minerals and Chemical Corp. (IMC), Mobil
Chemical Co., Poseidon Mines, Inc., P.S.A Enterprises, Occidental Chemical
Co., Swift Agricultural Chemical Corp., and U.SS. Agri-Chemicals, Inc. Soft
rock operators were Howard Phosphate Co., Kellogg Co., Loncala Phosphate
Co., Manko Co., Inc., and Sun Phosphate Co 
 Texas Gulf, Inc., Lee Creek, N.C., announced that they would increase phosphoric
acid capacity by 525 tons per day of P2O5.2 The expansion is scheduled to
be completed in 1974. 
 The Agrico Chemical Division of Continental Oil Co. (Agrico) was sold to
the Williams Cos., Tulsa, Okia., Agrico will become a part of Willchemco,
Inc., a division of Williams.3 Agrico announced a $50 million expansion at
its Donaldsonville, La., plant to increase the phosphoric acid 
capacity by 400,000 tons per year of P205.4 IMC and Fertiizantes Fosfatados
Mexicanos, S.A. plan to construct a fertilizer complex in central Florida.
The $80 million plant will be operated by IMC to produce diammonium phosphate
and triple superphosphate. Production of 600,000 tons per year is scheduled
for 1974:5 
 CF Industries, Inc., plans ' to double the size of its Plant City, Fla.,
fertilizer' manufacturing complex.6 The expansion will increase finished
product capacity to 650,000 tons per year of fertilizer. The expansion at
Plant City will include a 250,000-tonper-year phosphoric acid train, two
1,000ton-per-day sulfuric acid plants, and two granulation units. Scheduled
production in 1972 was 4.9 million tons, 5.2 million is planned for 1973,
and higher production is anticipated by 1976. Phosphate rock will be purchased
from Florida suppliers. 
 Conserv Chemicals, a division of conserv, Inc., Lakeland, Fla., plans to
reopen the plant purchased from ' Mobil Oil Corp. in 1971.7 After modernization
and renova,tion at a cost of several million dollars, the plant is scheduled
to start up in 1973 to produce phosphoric acid and fertilizers. 
 The Phosphate Rock Export Association (Phosrock) ' that was formed in 1971.
established headquarters in Tampa, Fla., in 1972 and after July 1, 1972,
handled the sales, supply, and distribution of phosphate rock in the export
market of its five member companies. They are Agrico Chemical Co., American
Cyanamid Co., W. R. Grace & Co., International Minerals and Chemical
Corp., and Occidental Chemical Co. 
 Western States.—Production of marketable phosphate was 4,555,000 tons,
a 9.4% increase over that of 1971. The value of the marketable rock decreased
to $23,268,000 or 2.7% below that of 171. The average grade of mined phosphate
ore was 26% P205, and the average grade of 
 ' Chemical Engineering. C. E. ' Construction Alert. V. 80, No. 8, Apr. 2,
1973, p. 69. 
 ' Chemical Marketing Reporter. Agrico Unit Changes Hands. V. 201, No. 19,
May 8, 1972, p. 3. 
 4Tampa Tribune. Agrico Expanding. Sept. 22, 
1972, pp. 7—13. 
 ' Chemical Engineering. C. E. Construction AlerL V. 80, No. 8, Apr. 2, 1973,
p. 69. 
 6CF Industries, Inc., Annual Report, 1972. 
P. 11. 
 ' Tampa Tribune. New Phosphate Finn To Begin Fertilizer Production in 1973.
Dec. 21, 1972, p 13. 


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