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Blast furnaces differ from bloomeries and reverberatory furnaces in that in a blast furnace, flue gas is in direct contact with the ore and iron, allowing carbon monoxide to diffuse into the ore and reduce the iron oxide. The blast furnace operates as a countercurrent exchange process whereas a bloomery does not.
The Chinese are thought to have skipped the bloomery process completely, starting with the blast furnace and the finery forge to produce wrought iron; by the fifth century BC, metalworkers in the southern state of Wu had invented the blast furnace and the means to both cast iron and to decarburize the carbon-rich pig iron produced in a blast ...
The PCI method is based on the simple concept of primary air (termed the "conveying gas") carrying pulverized coal which injected through a lance to the tuyere (mid-bottom inlet of a blast furnace), then mixed with secondary hot air (termed the "blast") supplied through a blowpipe in the tuyere and then piped to a furnace to create a balloon ...
The traditional Japanese tatara furnace uses charcoal and ironsand to produce a mixture of iron and steel. Small quantities are still made by the Nittoho Tatara in Japan. The tatara smelting process involves direct reduction and—unlike a blast furnace—at no time is the product fully molten.
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Bolckow Vaughan blastfurnacemen pose for a photograph in front of their blast furnace at Middlesbrough. Early 20th Century. Stated on Communigate to be 'courtesy of Corus plc' (now part of Tata Steel) which is presumed to have inherited Bolckow, Vaughan's photographic archives via Dorman Long and then British Steel.
Blast furnace 3, including the cast house, is one of the main components of the museum and features numerous information plates, exhibition pieces and documentary films on monitors. The blast furnace also serves as an observation platform. An elevator has been installed. A colorful light installation illuminates the blast furnace at night.
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