The ASA offers researchers and other interested stakeholders the opportunity to obtain samples of iron and steel slag (ISS) products on the completion of a Sample Materials Request Agreement.
- Blast Furnace Slag Blast furnace slag (BFS) is formed in a blast furnace with molten iron from iron ore in the reducing presence of heated air, coke and limestone. The resulting molten slag and iron, once removed from the furnace, are subject to further processing to form a crystalline, aggregate or ground blast furnace slag.
- Granulated Blast Furnace Slag Granulated blast furnace slag (GBFS) is formed when molten blast furnace slag is rapidly quenched from the furnace, rather than left to slowly solidify by air-cooling.
- Ground Granulated Blast Furnace Slag Ground granulated blast furnace slag (GGBFS) is formed when granulated blast furnace slag (GBFS) is further processed or ground using conventional cement clinker grinding technology.
- Steel Furnace Slag Steel furnace slag (SFS) is the co-product of the steel-making process or basic oxygen system (BOS). The slag is removed from the vessel after the exothermic refinement of molten iron and recycled steel in the presence of fluxes and oxygen.
- Electric Arc Furnace Slag Electric Arc Furnace Slag (EAFS) is a co-product formed in the electric arc furnace steel making process. In the final stages, EAFS is tapped from the vessel and solidifies prior to further processing. EAFS structure is best described as a solid solution of basic oxides.
- Melter Slag Melter Slag (MS) is a co-product of the steel making process that converts iron sand to iron by adding coal and limestone to iron sand. Melter slag differs from other slags in that the major oxides (calcium oxide and magnesium oxide) do not occur in their free form in the slag.
- KOBM Slag Klöckner Oxygen Blowing Maximillanshuette Slag (KOBM Slag) is a co-product of the steel making process used with BlueScope New Zealand Steel. The vessel is charged with the molten iron from the melter and a small proportion of scrap before refining begins using a top lance and bottom blown tuyeres to produce.