Word: ironing
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Dates: during 1950-1959
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Their unique experiment of mixing iron oxide and aluminum powder may not have added as much to the advancement of knowledge as some other M.I.T. research, but their application of lecture-room principles to concrete situations was consistent with the Institute's philosophy of making research an important part of education...
With the nation scraping the bottom of its high-grade iron deposits and steel capacity due to rise 60% (to 216 million tons yearly) by 1980, the development of such low-grade ores as jasper and its cousin, taconite, has become one of the fastest-growing branches of the booming steel industry. Items...
...Steel has two small Minnesota taconite plants at Mountain Iron and Virginia, Minn, that ship 500,000 tons yearly, is planning a huge new plant near by to boost annual production to more than 10 million tons...
Though processing low-grade ore costs up to $30 per ton, the even quality of the pellets hikes blast-furnace output as much as 20%, and produces better pig iron. An even bigger advantage of low-grade iron ore is its large supply. Only five years ago steelmen were predicting that some of the nation's high-grade ore deposits would be mined out by 1970. By using its low-grade ore, the U.S. should have plenty of ore for another several hundred years...
...Jasper is blasted from the earth, crushed to powder, washed to rid it of some impurities, then mixed into a special oil solution that floats the fine particles of iron to the surface. They are concentrated into small pellets by centrifuge...