1994 Volume 80 Issue 4 Pages 270-275
Pisolite is an important raw material for sinter ore because its deposit in Australia is rich and easy to be explored. This ore is mainly made of goethite with a oolitic structure. After produced as lumpy ore, it is crushed to be a raw material for sinter ore, however, pisolite is known to have negative effects on sintering process. For a better use of this material, we propose a process to use lumpy pisolite ore as a hearth material in sinter plants. Our pot tests showed that this, process has a higher productivity and yield, compared with the conventional process that uses sinter ore as a hearth material and fine pisolite as a raw material for sinter. A 1.5-day test in our commercial sinter plant and blast furnace in Kokura also showed that this new process enables more use of cheap pisolite and reduces the energy consumptior in sintering process.