Particle Size Matching Mechanism of Blending Ore and Solid Fuel in Sintering Process

摘要

The particle size of imported iron ores has gradually become bigger, which is adverse to mineralization and reaction in sintering process. At present, only imported iron ore fines are used in Jingtang sintering plant. And it is hard to control the particle size of imported iron ores. Different iron ore fines are mixed properly before charged to sintering machine. It is an important means to solve this problem to seek the particle size matching between solid fuel and iron ore fines. The suitable matching mode of fuel particle size (d) and blending ore particle size (D) is as follows: d/D = 0.47 ～ 0.54. When the particle size of blending ore changes, the fuel particle size should be controlled according to d/D with fuel crushing process. Since the matching mode was applied, the main quality indexes of sinter improved obviously. The return fine rate of sinter decreased from 25.43 to 24.64%, and the solid fuel consumption decreased from 44.8 to 43.9 kgce/t.