Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)
Cammarota, V. Anthony, Jr.; Lucas, John M.; Gorby, Barbara M.
Zinc, pp. 981-1019 ff. PDF (3.8 MB)
1,510 1,000 500 U.S. MINE PRODUCTION SLAB ZINC I I I 198b 1960 1965 Figure 1.—Trends in supply and consumption in the United States. 1970 982 MINERALS YEARBOOK, 1978-79 slowed in the second half of the year. Quoted prices for Prime Western Grade zinc increased from 29 cents per pound in February 1978 to 40.5 cents in mid-1979, but by yearend had fallen to37~5 cents. Producer stocks rose significantly in 1979, while consumer stocks declined somewhat. Legislation and Government Programs.—The stockpile goal for zinc remained at 1,191,134 tons through 1979. The Environmental Protection Agency (EPA) issued final regulations limiting the content of pollutants including zinc, in effluents from ore mining and milling operations. The maximum zinc content was set at 1.5 milligrams per liter per day for mine drainage and two-thirds that amount for mill effluent. These regulations, effective July 11, 1978, represent the degree of control achievable by the application of the best practicable control technology available. In its economic analysis, EPA did not expect the regulations to affect significantly prices, production, and capital availability, and expected little impact on the local economies or balance of trade. In December 1977, the Lead-Zinc Producers Committee filed a petition with the U.S. International Trade Commission seeking temporary relief from excessive imports. On June 20, 1978, the Commission found that increased imports of unalloyed, unwrought zinc were not a substantial cause of serious injury or a threat thereof, to the domestic industry for purposes of the import relief provisions of the Trade Act of 1974. In accordance with the Trade Act of 1974, the Department of Labor investigated the eligibility of certain workers in the zinc industry to apply for worker adjustment assistance. The Department found that increased imports of zinc materials led to worker layoffs at about 19 mines, 2 smelters, and 2 plants that processed zinc-bearing materials in 1978-79. Benefits to eligible employees provide for such items as training, assistance in finding a new job, and a relocation allowance. The International Lead and Zinc Study Group held an extraordinary session in July 1978 to evaluate the zinc situation in addition to its regular session in Geneva, Switzerland, in November. The Study Group found that the zinc market improved in 1978 through reduction in producer stocks, and noted the rapid rise in zinc exports to Socialist countries, and the closure of about 20 mines with a total production rate of about 150,000 tons of zinc per year. At its annual session in Geneva in October 1979, the Study Group was concerned about the supply of zinc metal exceeding demand and the resultant increase in stocks in 1979-80.
http://rightsstatements.org/vocab/NoC-US/1.0/| As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright