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About pig iron. Define pig iron with definition and properties.
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It is  crude form of iron and is used as a raw material for the production of various other ferrous metals, such as cast iron, wrought iron and steel. The pig iron is obtained by smelting iron ores in a blast furnace. The main raw materials required for pig iron are:

(1) Iron ore

(2) Cooking coal and

(3) Flux

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