Slag Grinding Plant - Great Wall MachineryGGBS(Granulated Blast-furnace Slag) cement . It is produced by grinding premium quality Granulated Blast-furnace Slag, a by-product of steel manufacturing process,consisting essentially of silicates and alumino-silicates of calcium and other bases, is formed when molten iron blast-furnace slag is rapidly chilled.slag grinding unit,Blast Furnace Slag Grinding Plant ,Blast Furnace Cement Blending .Water quenched BF Slag can be ground and dried out with system shown (illustrated below). BF Slag powder blended with Portland cement and/or fly ash becomes a new green building material called “Blast Furnace Cement” (BF Cement). Blast Furnace Cement Blending Plant. A BF Slag Grinding Plant is not necessarily.