Ground Granualated Blast Furnace Slag

Slag, a non-metallic by-product obtained from blast furnaces of steel plants, is formed when iron oxide is converted into pig iron in the blast furnace using coking coal and fluxes. This molten blast furnace slag is poured into a granulator and is rapidly quenched through high-pressure water jets, to produce granular particles. This granulated slag is known as granulated blast-furnace slag (“GBFS”). GBFS then undergoes water quenching in a controlled environment to prevent crystalline formation. The GBFS is then dried and ground, producing GBBS. (Source: CRISIL report)