In The crucible process of making steel, mixtures of wrought iron, steel scrap and ferro manganese are melted down with charcoal in the air tight crucible. Other ferro alloys may be added when alloy steel is produced by this process. In this crucible process, Carbon is added to the iron as the carbon content of the wrought iron is low. Necessary carbon is taken up by the metal from charcoal during melting. After the materials are melted and thoroughly alloyed, the crucibles are taken from the furnace known as regenerative furnace which is heated by gaseous fuel as in the open - hearth furnace , and finally the steel is poured into ingot mold. The length of time between placing the crucible in the furnace and withdrawing the crucible is approximately four hours.
The process is primarily a melting and alloying process and no refining of the metal takes place in the crucible.
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