Uniformity of Blast-Furnace Parameters over the Perimeter

Evaluation and Improvement of Circumferential Uniformity for Blast Furnace Raceway

“…Jue TANG,* 1,2) Zedong ZHANG, 1) Quan SHI, 1) Mansheng CHU, 3,4) Anchuan LIN 5) and Yingjie LUO 5) 1) School of Metallurgy, Northeastern University, [3][4][5][6][7][8][9][10][11] The bustle pipe model of a running 2 500 m 3 blast furnace was established. The local and overall uniformity indexes of the raceway were defined and constructed.…”

“…In order to describe the circumferential uniformity for raceway, the local uniformity index named U i and the overall uniformity index named U were proposed according to the principle of statistical normalization, given as Eqs. ( 7) and (8). Where, E i is the blast kinetic energy at the i th tuyere, kJ/s; E is the average blast kinetic energy, kJ/s; n is the number of tuyere, -.…”

“…[1][2][3][4][5] The circumferential unevenness of raceway would lead to the inconsistency of circumferential hearth activity, resulting in the deterioration of burden descent, the bad smelting environment, the decrease of pig iron quality, and the damage of BF service life. [6][7][8][9][10] Therefore, the research on the circumferential uniformity of raceway had attracted much attention in recent years. [11][12][13][14][15][16][17][18] Bugaev et al found that the blast temperature difference among all the tuyeres was 150-250°C and the maximum adiabatic combustion temperature difference of raceway was corresponding to 508°C (1 772-2 280°C), when the…”