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    Before applying the powder to the surface or joint, the area must be preheated. Steel is heated to a straw color while brass and copper are heated to approximately 800°F (427°C) e.

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    Before natural gas can be used for reducing iron oxide, it must be reformed into carbon monoxide and hydrogen. The reforming agents are typically steam and/or carbon dioxide, and the process is most efficiently done in the presence of a nickelbased catalyst at elevated temperatures.

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    The two basic materials are ground and fed into a rotating furnace. The combustion product, called clinker, is cooled and stored before being pulverized. It is pulverized with a number of added materials such as gypsum, but also natural or artificial pozzolan and blast furnace slag, etc.

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    Reduction of hematite into magnetite occurs in the upperstack at 500600°C, and this is accompanied by volume expansion even tothe extent of 25%.This results in compressive stresses being developed and contributessignificantly to breakdown of the iron furnace operators prefer a low RDI (below 28 or so) since the adverseeffect of ...

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    The process of putting a furnace in blast was a lengthy one. First, a fire fueled with charcoal was started in the hearth until the furnace stack was heated sufficiently. Then a small charge was loaded in the furnace.

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    It had been observed before, but was first prominently brought before the iron metallurgists through the researches of Sir Lothian Bell, that sesqui oxide of iron (Fe203) possessed the property of splitting up CO into C f C02 at temperatures existing in the upper region of a blast furnace.

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    Go into any of the great mining works of central Germany, and you may see acres covered by machinery ingeniously constructed to clean, break, and sort, and ultimately deliver the ores into trucks or direct into the furnace, and the whole under the supervision of a youngster or two.

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