Pig iron - WikipediaPig iron is an intermediate product of the iron industry. Pig iron has a very high carbon content, . furnace was an avoided phenomenon, as decarburizing the pig iron into steel was an extremely tedious process using medieval technology.pig iron processing,Production of pig iron - Schenck ProcessPig iron is produced in the blast furnace sector. The raw materials used include ore, sinter, coke, lime and various aggregates. To ensure that the production.