Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
DeHuff, Gilbert L.
Manganese, pp. 757-769 ff. PDF (1.5 MB)
' 757Manganese By Gilbert L. DeHuff1 There was no actual production of manganese ore, concentrate, or nodules, containing 35% or more manganese, in the United States in 1972, but a small quantity of manganese nodules continued to be shipped from stocks. Imports of managanese ferroalloys and metal were at a high rate, and domestic producers continued to be faced with the problems of pollution control and adequate availability of power. Plans were underway for substantial new capacity for production of electrolytic manganese metal in the Re. public of South Africa. Table 1.—Salient manganese statistics in the United States (Short tons) 1968 1969 1970 1971 1972 Manganese ore (35% or more Mn): Production (shipments): Metallurgical Battery Total Imports general Consumption Manganiferous ore (5% to 35% Mn): Production (shipments) Ferrornanganese: Production Exports Imports for consumption Consumption 10,536 842 5,630 - - 4,737 - - 142 - - 578 - - 11,378 1,827,626 2,228,412 244,590 879,962 3,710 203,212 1,016,559 5,630 1,959,661 2,181,333 430,637 852,019 1,759 307,891 1,071,042 4,737 1,735,055 2,363,937 368,302 835,463 21,747 290,946 1,000,611 142 1,914,264 2,155,454 198,334 759,896 4,526 242,778 899,011 578 1,620,252 2,331,459 147,161 800,723 6,842 348,539 967,968 Legislation and Government Program&— Under the provisions of the Strategic and Critical Materials Stock Piling Act, as amended (Public Law 520, 79th Congress) the Office of Emergency Preparedness redetermined the following manganese items to be strategic and critical: Natural battery manganese ore, battery-grade synthetic manganese dioxide, type A chemical-grade manganese ore, type B chemical-grade manganese ore, metallurgical manganese ore, high-carbon ferromanganese, mediumcarbon ferromanganese, low-carbon ferromanganese, silicomanganese, and electrolytic manganese metal. Sales of surplus metallurgical ore in calendar year 1972 totaled 1,243,744 short dry tons. These sales were on a negotiated basis with deliveries limited. Sales of surplus synthetic manganese dioxide in the calendar year were 1,278 short dry tons, all on a competitive sealed-bid basis. No acceptable bids were received in response to a General Services Administration (GSA) offering of surplus natural battery-grade ore, or to its offerings of surplus chemicalgrade ore, types A or B. Manganese stockpile inventory changes in the calendar year consisted of the following:Metallurgical ore, stockpile grade, decreased 490,705 short tons to 7,672,536 tons; metallurgical ore, non-stockpile grade, decreased 2,800 tons to 1,389,771 tons; synthetic dioxide decreased 2,619 tons to 17,019 tons; and stockpile-grade natural battery ore decreased 45 tons to 253,451 tons. 1 Supervisory physical scientist, Division of Ferrous Metals.
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