Fundamental Research on the Cross Double Lance for PCI at Blast Furnace

Through a water simulation experiment, the influence of cross jet parameters on principle strain was studied. It is beneficial to the mixing effect by increasing the cross corner and momentum at outlet and keeping an appropriate distance between the two lances. The effects of different types of lances on the combustion rate of pulverized coal were researched in laboratory. The results show that the oxygen and coal double lances or the two coal double lances could obtain a higher combustion rate than any type of single lance. It is concluded that cross jet can achieve a good condition of heat transfer and mass transfer for the combustion of pulverized coal in front of a tuyere.