Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Polta, Harold J.
Iron and steel scrap, pp. 667-681 ff. PDF (1.4 MB)
672 MINERALS YEARBOOK, 1972 ceiling of 178,000 tons for the first half of 1973. The decision guaranteed an export quota of 55,000 tons to West Germany, 80,000 tons to France, and 53,000 tons to the Netherlands. However, the decision could be reexamined at any time and had to be reexamined before March 31, 1973. J.n France, regrouping of the ferrous scrap processing industry ' through mergers and takeovers left the country with only four major scrap processors.S The regroupment was reported to have given financing ability for branching out into ' such ventures as mini-steel mills, four of which were cited as ' being in the planning stage. Steady, but low demand for scrap through- out the year had the price of No. 1 scrap as low as $20 a ton. However, demand increased sharply in November so that the price rose to $30 by the end of the year. French scrap processors are subject to EC Commission rules and apparently are somewhat frustrated by export controls to third countries. Luxembourg reported consumption of 1.6 million tons of iron and steel scrap in 1972. Most of this came from domestic sources. Imports, principally from its EC partners, supplied only 321,000 tons. Luxembourg does not export any scrap, and there ' are no special price controls in effect. TECHNOLOGY Processors of scrap continued to upgrade scrap, particularly through the use of shredders. T'he 100 or so shredders built in the past 10 years have an annual shredding capacity of about 4 million tons. The use of auto flatteners has greatly increased the number of junked autos that can be hauled on a vehicle and has extended the economic haul distance for junked autos considerably. With most areas in the country, where huge generations of scrap exist, already having very large shredding plants capable of shredding 10,000 to 18,000 tons a month, the trend was towards the design and marketing of smaller less expensive shredding ' facilities. At the Third Mineral Waste Utilization Symposium in March,9 a participant stated that the country could support an additional 100 shredding plants ' having a 3,000-to 4,000-ton-per-month capacity. According to calculations presented, capital investment of about $750,000 was required for such an installation. The "Auto Reduction Mill" designed and installed in St. Paul ' by Dravo Corp. was the first shredder type machine with hammers rotating about a vertical axis.10 Chief advantage of the 30-ton-per-hour capacity mill, according to the corporation, was its ability to produce a denser product than the conventional hammermill-type shredder. in Wisconsin the Appleton Machine Co. was building a preshredder for the Ripsteel Corp.11 The machine was designed to *tear automobiles into small pieces that could be either baled or fed continuously into a small high-speed hamniermill. Early in the year National Steel Corp. demonstrated to an audience of public officials, food and beverage packers, can manufacturers, and conservationists that it is technically feasible to use scrap steel cans in ' steelmaking by including 8 tons of ' cans to an electric furnace heat and 37.5 tons of scrap to the charge of a blast furnace at the rate of ' 50 pounds per ton of hot metal produced.12 Following an American ' Iron and Steel Institute contract ' with Swindell-Dressler Corp. for evaluating various techniques for separating ferrous materials (including cans) from municipal wastes deposited at transfer stations prior to their incineration or burial in land fills, National Steel Corp. joined Stroh Brewery Co. in commissioning Swindell-Dressler to make a follow-up study, namely, the reclamation and remelting of incinerated scrap steel cans into new primary steel. 8 American Metal Market. France Optimistic on New Year, But Not Ready to Go Overboard. V. 80, No. 9, Jan. 12, 19.73, p. llA. ' U.S. Bureau of Mines and lIT Research Institute. Proc. 3d Mineral Waste Utilization Symp. Mar. 14—16, 1972, Chicago, Ill., 1972, pp. 224— 233. ~° American Metal Market. Dravo Sells 1st ' Auto Reduction Mill' to Alter; Operation Set for Early January. V. 79, No. 204, Nov. 8, 1972, p. 20. 11American Metal Market. Firms Join in Producing Car Shredder. V. 79, No. 18, Jan. 26, 1972, p. 14. ~' American Metal Market. New Mill Capabilities Shown in Steel Can Recycling. V. 79, No. 12, Jan. 18, 1972, p. 17.
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