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Metallurgical coal or coking coal [1] is a grade of coal that can be used to produce good-quality coke. Coke is an essential fuel and reactant in the blast furnace process for primary steelmaking . [ 2 ] [ 3 ] [ 4 ] The demand for metallurgical coal is highly coupled to the demand for steel.
The following table lists the coal mines in the United States that produced at least 4,000,000 short tons of coal.. According to the U.S. Energy Information Administration (EIA), there were 853 coal mines in the U.S. in 2015, producing a total of 896,941,000 short tons of coal.
After the Civil War a beehive coke industry gained a foothold in the region. The heyday of the Connellsville Coalfield was from the 1880s to the 1920s. At least 60 coal towns, known as "coal patches", were constructed in the field. H.C. Frick Coal and Coke - a subsidiary of U.S. Steel after 1903 - was the major player. Other notable ...
The company's U.S. underground mines produced high-quality coal from Alabama's Blue Creek seam. Jim Walter Resources, the Company's U.S. underground coal mining unit, has grown from a small producer of less than 1 million tons of coal per year, produced solely for use in its sister company's coke ovens, into one of the 25 largest coal metallurgical coal producers in the United States, with ...
Iron ore, coke, and flux are fed into the blast furnace and heated. The coke reduces the iron oxide in the ore to metallic iron, and the molten mass separates into slag and iron. Some of the iron from the blast furnace is cooled, and marketed as pig iron; the rest flows into basic oxygen furnaces, where it is converted into steel.
Raw coke. Coke is a grey, hard, and porous coal-based fuel with a high carbon content. It is made by heating coal or petroleum in the absence of air. Coke is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges.
Coke from coal is grey, hard, and porous and has a heating value of 29.6 MJ/kg. Some coke-making processes produce byproducts, including coal tar, ammonia, light oils, and coal gas. Petroleum coke (petcoke) is the solid residue obtained in oil refining, which resembles coke but contains too many impurities to be useful in metallurgical ...
Gas emission. Coke oven interior: detail (1942, USA). The coke oven is the central element of a coking plant. Horizontal ovens, which are the most commonly used (they are suitable for monitoring the various extraction stages), take the form of narrow compartments (approx. 50 cm wide), but several meters high and several meters deep.
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