Pig Iron Specification

The traditional form of the molds used for pig iron ingots is a branching construction formed in sand, with many individual ingots at proper angles to a central channel or “runner”, resembling a litter of piglets being nursed by a sow. When the metal had cooled and hardened, the smaller ingots (the “pigs”) were merely damaged from the runner (the “sow”), hence the name “pig iron”. As pig iron is meant for remelting, the uneven measurement of the ingots and the inclusion of small quantities of sand brought on solely insignificant problems contemplating the ease of casting and handling them.

what is pig iron

This is achieved by remelting pig iron, usually along with substantial quantities of steel and scrap iron, eradicating undesirable contaminants, adding alloys, and adjusting the carbon content. Some pig iron grades are suitable for producing ductile iron. These are high purity pig irons and depending on the grade of ductile iron being produced these pig irons could also be low in the components silicon, manganese, sulfur and phosphorus. These forms of pig iron are used to dilute all the weather in a ductile iron charge which may be harmful to the ductile iron course of. iron tapped from a blast furnace and cast into pigs in preparation for conversion into metal, forged iron, or wrought iron.


It was the primary to introduce low phosphorous foundry-grade pig iron in India. The Company also commissioned an 800,000 tones’ sintering facility that would enable the PID to partially meet its iron ore requirement with sintered iron ore fines, resulting in significant price savings and increasing efficiencies. Pig iron is produced by smelting or iron ore in blast furnaces or by smelting ilmenite in electrical furnaces. Pig iron, crude iron obtained directly from the blast furnace and forged in molds.

We are lengthy-term suppliers to a few of the world brands & OEMs from automobile industry and a few of the most reputed steel mills and foundries. Since coal fires required a unique type of cookware, funding poured into brass and iron, hastening the development of pig iron—hastening, that’s, the onset of the Industrial Revolution. The IIMA is devoted to those concerned within the ore-based mostly metallics worth chain – raw material supply, production and transformation, trading and distribution, transportation and logistics, expertise and equipment.

Origin Of Pig Iron

The sizzling metallic was then poured right into a steelmaking vessel to provide steel, usually an electric arc furnace, induction furnace or fundamental oxygen furnace, where the excess carbon is burned off and the alloy composition managed. Earlier processes for this included the finery forge, the puddling furnace, the Bessemer process, and the open fireside furnace. Traditionally, pig iron was worked into wrought iron in finery forges, later puddling furnaces, and more lately, into steel. In these processes, pig iron is melted and a robust current of air is directed over it whereas it’s stirred or agitated. This causes the dissolved impurities to be totally oxidized. An intermediate product of puddling is called refined pig iron, finers steel, or refined iron.

These liquid products are drained from the furnace at regular intervals. The hot air that was blown into the bottom of the furnace ascends to the top in 6 to 8 seconds after going by way of quite a few chemical reactions. Once a blast furnace is began it’s going to repeatedly run for 4 to ten years with solely short stops to perform deliberate upkeep.

Steel Dynamics, which has facilities located in the U.S. and in Mexico, produces metal products, liquid pig iron, and processes and sells ferrous and nonferrous scrap. Modern steel mills and direct-reduction iron vegetation transfer the molten iron to a ladle for quick use within the steel making furnaces or forged it into pigs on a pig-casting machine for reuse or resale. Modern pig casting machines produce stick pigs, which break into smaller four–10 kg piglets at discharge. The part transition of the iron into liquid in the furnace was an prevented phenomenon, as decarburizing the pig iron into steel was an extremely tedious course of using medieval technology.

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