During the steel production where Sponge Iron (DRI) is applied as a raw material, large quantities of undersized particles and fine are made which are not useful to be used in steelmaking. These metallic particles and fines are formed into the briquettes using sodium silicate (Na2SiO3) as the binder and lime as the flux. The formed briquettes are referred to as cold briquetted iron (CBI) since they are compacted while the fines are cold. In other words, cold-molded briquettes produced from fines and by-products, that generated during the process of production, storage, and handling of DRI are known as “Cold Briquetted Iron (CBI)” in direct reduction (DR) industries. DRI fines are pressed together with a special adhesive and the output is briquette in size of 5*3*3 and is used in steel-producing furnaces.
| Chemical Composition | % Value |
|---|---|
| Total Iron | 78-80 |
| Metallic Iron | 86-88 |
| Metallization | 89-91 |
| Carbon (C) | 1.5-1.7 |
| Sulphur (S) | Max.0.03 |
| Density | 3.7-4 gr/cm3 |