Table 5.-Mine production of recoverable silver in the United States, by State State (Troy ounces) 144,515 1,817,699 301,992 South Dakota. Tennessee. Utah.. Washington. Total. Missouri. Montana. New Mexico. New York. Oklahoma. Oregon Pennsylvania. 565,755 31.103 2 279,898 (2) 121,258 226,168 2,066,464 17,033,330 568 1 371.745 472,813 340,856 2,132,571 1,646,283 15,958,715 2,598,563 18,929,697 645, 192 601,470 782,441 17,928 2 362,646 5,953,567 6,029,737 5,294,477 (2) 41,564,142 1 Production of Maine, Oklahoma, Pennsylvania, Washington, and Wyoming (1969) combined to avoid disclosing individual company confidential data. 2 Production of Oklahoma, Pennsylvania, Washington, Illinois (1971), and North Carolina (1971) combined to avoid disclosing individual company confidential data. Table 6.-Silver produced in the United States from ore, old tailings, etc., in 1971 by States and methods of recovery, in terms of recoverable metal 1 Includes some nonsilver-bearing ore not separable. 2 Excludes tonnage of fluorspar, magnetite-pyrite, and tungsten ores from which silver was recovered as a byproduct. Less than 1⁄2 unit. Includes Illinois, Maine, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, Tennessee, and Washington. 1967 1968. 1969 1970. 1971 Table 7.-Silver produced at amalgamation and cyanidation mills in the United 1 Crude ores and concentrates. Less than 1⁄2 unit. 1 Includes silver-bearing copper, silver-bearing lead anodes, ceramic paints, etc. 128,404 129,146 2.474 131,620 129,113 Argentina.. Ore and concentrates Table 12.-U.S. general imports of silver in 1971, by country (Thousand troy ounces and thousand dollars) Australia. Austria. Belgium-Luxembourg. $94 23,971 1 Recoverable content of ores and concentrates produced unless otherwise noted. ? In addition to the countries listed Bulgaria, Guatemala, Thailand, Turkey, and several other African countries produced silver, but quantities are insignificant or not reported. Production by the State Mining Company (COMIBOL) plus exports of medium and small (private sector) mines. Smelter and/or refinery production. Output of Inyati mine only. Recoverable content of Tsumeb Corp. Ltd. concentrates, as reported for year ending June 30 of year stated. ' Includes recovery from copper refinery sludges. Slag-Iron and Steel By Harold J. Drake 1 In 1971, the combined supply of iron and steel slag decreased about 1 percent, reflecting principally a 5-percent decline in the output of iron-blast-furnace slag and a 13-percent increase in the output of steel slag. Demand for iron slag exceeded supply, thus assuring consumption of all production. Demand for steel slag, as in past years, was somewhat less than the output mainly because of the failure to develop potential uses. Prices of iron and steel slag generally rose through the first 6 months of 1971 but thereafter were relatively stable or, for some kinds, declining. Imports were up about one-fourth, and exports were off about one-fourth. 1 Physical scientist, Division of Nonmetallic Minerals. Table 1.-Iron-blast-furnace slag processed in the United States, by types Table 2.-Iron-blast-furnace slag processed in the United States, by States 2 Alabama, California, Colorado, Kentucky, Louisiana, Maryland, Minnesota, New York, Texas, Utah, and West Virginia. 'Data may not add to totals shown because of independent rounding. Source: National Slag Association. |