| OCR Text |
Show 35 the total cost of are coking not released to the coal at the public. reapective plants, in the sources production o of price figures 28 Ore Iron Adequate since supply iron and ste·el. for iron primary requisite ore are a The oxides of iron are the only iron-bearing mine%a1s utilized for steel-making in the United States. The main oxides of iron 'hematite (FeZ04 limonite percentage of contains and 'a Magnetite m.etallic iron, is Limonite contafn enough is ore lime to be hematite. The ore usually tq be of as Both the soft However, in most instances, high a quality magnetite as is the and separation of from this contained oxygen. is mined and of always, com.bined with water, and may primary blast furnace operatian its location with one and Hematite, which of oxygen, is ofte a, but not The economic value of iron is hard and dense. chemically (FeZ 03) which contains the highest ore, self-fluxing. is not considered ore the iron HZO (Fe3 04' mapetite hi"gher percentage earthy. such X are respect transported discovering quality ore is aHected by its iron content, to market, and the conditions under which it to the blast furnace site. the iron and available ferent localities and regions. ore deposits supply The The baste which nature has of iron ore ge·ological varies problem proviced. greatly occurrence in dif-. of iron ores Z8See J. R. Mahoney "The 'Western Steel Indu.y," Utah Economic and Business Review, Vol. 3, No.1. (June, 1(44), p:-:r9":" (Comparable data for an earlier p.eriod is presented therein). |
