Generally speaking, blast furnace ironmaking companies will reduce operating costs by blowing alternative fuels with hot air, because this can reduce the coke ratio of the charge and increase the oxygen enrichment rate to promote the combustion of supplementary fuel. However, although this is economically beneficial to the operation of the blast furnace, it also brings about many process and operational problems. The patented sequential pulse injection process SIP provided by Primetals Technologies can adjust oxygen-rich conditions and increase the local oxygen concentration in the tuyere circulation area through a series of controlled high-energy pulses. The resulting effect is to promote fuel combustion and conversion, thereby improving the distribution and discharge of air flow.
In addition, the SIP patented technology increases the oxygen penetration capacity and moves the generated heat load further to the central area of ??the blast furnace, which can increase the proportion of coke in the charge without reducing the air permeability or increasing the total pressure drop. . With the support of such technology, it is also guaranteed to increase the replacement amount of coke by injection materials and improve production capacity while avoiding deterioration of process conditions.