The movement and distribution of burdens in a COREX shaft furnace with four arrangement ways of AGD beams

The Areal Gas Distribution (AGD) beams arranged in COREX shaft furnaces have been proven to optimize the distribution of the reducing gas. However, the effect of AGD beams on the movement and distribution of the burdens has not been systematically studied. Flow pattern diagrams that can comprehensively show the characteristics of particles moving at different positions are drawn and the residence times of burdens are compared among four arrangement ways of AGD beams. The mass segregation of four mixed particles and the voidage change are revealed. The results show that the average residence time of burdens in a normal COREX shaft furnace is slightly larger than that in furnaces with AGD beams. The mass segregation degree of coke is the largest in furnaces with AGD beams. The voidage in the zones below the AGD beams increases and the largest change of voidage occurs in the furnace with a single AGD beam. (c) 2024 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.