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Melting of pig iron@ without coking coal - comprises allowing agglomerate of ore, coal and bonding agent to stream down from top of cupola furnace, heating with gas stream and contacting with bed of ceramic spheres
Melting of pig iron@ without coking coal - comprises allowing agglomerate of ore, coal and bonding agent to stream down from top of cupola furnace, heating with gas stream and contacting with bed of ceramic spheres