1992 Volume 78 Issue 7 Pages 1140-1147
Fundamental experiments and development of 2 dimensional mathematical model were carried out to clarify Si transfer mechanism in the lower part of blast furnace by the reaction kinetics theory. According to experiments and calculation results, SiO gas generation from coke and slag near the raceway zone was controlled not by equilibrium theory, but by reaction kinetics. Especially, SiO generation rate from coke is the most important factor for controlling Si concentration in molten iron. Decreasing of gas temperature in the region near raceway and improvement of permeability in the deadman is effective for the decreasing of Si concentration in molten iron.
