Xinda Group Cementious Material Co.,Ltd
(GBFS)Granulated Blast Furnace Slag
Product name : (GBFS)Granulated Blast Furnace Slag
Products Category: > Slag(GBFS)Granulated Blast Furnace Slag
Product name : Granulated Blast Furnace Slag(GBFS)
Details :In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product. This molten iron product can be cast into iron products, but is most often used as a feedstock for steel production.
Blast furnace slag is a nonmetallic coproduct produced in the process. It consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. The molten slag, which absorbs much of the sulfur from the charge, comprises about 20 percent by mass of iron production. Figure 3-1 presents a general schematic, which depicts the blast furnace feedstocks and the production of blast furnace coproducts (iron and slag).
Granulated Blast Furnace Slag(GBFS)
If the molten slag is cooled and solidified by rapid water quenching to a glassy state, little or no crystallization occurs. This process results in the formation of sand size (or frit-like) fragments, usually with some friable clinkerlike material. The physical structure and gradation of granulated slag depend on the chemical composition of the slag, its temperature at the time of water quenching, and the method of production. When crushed or milled to very fine cement-sized particles, ground granulated blast furnace slag (GGBFS) has cementitious properties, which make a suitable partial replacement for or additive to Portland cement.
Granulated Blast Furnace Slag has a glassy structure and can be used as a fine aggregate or binder. GBFS is commonly used in the manufacture of blended cements where it is inter-ground or blended separately with cement usually at a 20% - 40% proportion. Unblended GBFS is can be used in road pavements and building products.
