Study of the Double-Layer Sintering Process with Stand-Support

Abstract

It has been widely reported that the sintering productivity and sintering bed permeability would be reduced when adopting ultra-deep bed sintering. To solve the aforementioned problems, the double-layer sintering process with stand-support (DLSP-S) is proposed in this research to achieve the sintering of a 1000 mm ultra-deep bed. The results showed that compared with the double-layer sintering process, the DLSP-S improved the yield and productivity of sintering from 64.53% and 1.76 t·m−2·h−1 to 66.74% and 2.12 t·m−2·h−1, respectively. The research findings showed that the quasi-fines of 5–10 mm were reduced by 2.1% when the stand height increased from 0 mm to 350 mm, which further illustrated the effect of the DLSP-S. During the DLSP-S, the air permeability of the sinter bed was evidently improved and the content of O2 in the lower layer was enhanced. The present study provides an effective approach to improve the bed permeability and sintering productivity in high-bed sintering.