Slag, Ground granulated blast-furnace slag - WikipediaGreen Bond Second Opinion,  · Granulated Blast Furnace Slag) project, LKAB works with steel producers and aims to recycleaccruing non-iron slag from steel production from iron-ore pellets as an additive to concrete. According to the issuer, GGBS production solely runs on 2 ...WHAT IS CONCRETE ? | CIVIL ENGINEERING 365,  · Ground granulated blast furnace slag (GGBFS or GGBS): A by-product of steel production is used to partially replace Portland cement (by up to 80% by mass). It has latent hydraulic properties. Silica fume: A byproduct of the production of silicon and ferrosiliconGround granulated blast,  · Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore. Slag is usually a mixture of metal oxides and silicon dioxide. However, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal smelting, they can also serve other ...