Blast furnace productivity and the influencing parameters Jun23

Blast furnace productivity and the influencing parameters...

Blast furnace productivity and the influencing parameters Blast furnace (BF) is a process of iron making. During mid eighties BF technology got established and left behind other technologies of iron making. Since then continuous developments are taking place in this technology to make it more productive and economical. Even today it is offering very stiff opposition in the development of alternative iron smelting processes. The blast furnace is a counter current reactor in which the reducing gas is produced by the gasification of the carbon of the coke with the oxygen of the hot blast injected via tuyeres in the lower part of the furnace. The reducing gas flows upwards reducing the iron bearing materials charged at the top of the furnace. Blast furnace process consists of a multivariate system which is subjected to a large number of inter-influencing variables affecting the performance of the blast furnace. It is necessary to isolate the inter-influence of the variables to understand the role played each variable on the performance of the blast furnace. The performance of a blast furnace is determined by many parameters out of which productivity is the major one. The blast furnace productivity is the quotient between possible gas throughput per unit of time and required specific gas generation for one ton of hot metal (HM). Hence an increase in the productivity on the one hand requires an increase in the gas throughput, which implies improvement in the furnace permeability and on the other hand a reduction in the specific gas requirement, which means a reduction in the specific consumption of reducing agent. Blast furnace productivity is usually expressed in tons of hot metal produced/day/Cum of working volume. In some countries, in place of working volume, useful volume is considered. There are many factors which...