Granulated Blast Furnace Slag

Granulated Blast Furnace Slag (GBFS) is a fine powder dust produced by quickly chilling molten slag with industrial water, and grained in INBA granulation plant. We can supply this in bags of 1 MT each and loading approximately 28 -29 MT on a 40’ HC container.

Please see below for the chemical/physical properties of the product we supply:

Aspect: Solid and Dusty

Physical Form: It is an amorphous, coarse sand sized material exhibiting hydraulic cementitious features

Color: Light Yellow

Moisture: 10-18%

Average granule size: 1.05-1.30 mm

Chemical Element Value Range Measure Unit
SiO2 34 – 40 %
Al2O3 10 – 15 %
CaO 30 – 40 %
MgO 9 – 14 %
S 0.9 – 1.3 %
MnO 0.3 – 1 %
FeO 0.2 – 0.7 %
TiO2 0.5 – 1.3 %
Total Alkali 0.6 – 1.2 %

In the blast furnace slag we can supply, the content of calcium oxide, magnesium oxide and silica dioxide is above 67% and the ratio in between these elements is above 1 (CaO+MgO/ SiO2). GBS is stockpiled to allow the dranage of excess moisture. Magnets are used before and during the grinding process to remove any residual metallic iron.