Research on the Gasification Characteristic of Cokes of BIOC-HPC Extracted from the Mixture of Low-Rank Coal and Biomass

The aim of this paper is to provide theoretical guidelines for biomass and low-rank coal in coking and promoting the development of low carbon ironmaking; the modified coal (BIOC-HPC) was produced, and its performance as an additional component in coking process was also investigated through co-thermal extraction method. The effect of the addition amount of BIOC-HPC extracted from 80 wt.% low-rank coal and 20 wt.% biomass on the gasification performance of BIOC-HPC coke was investigated. The results showed that with the increase of BIOC-HPC content, the coking yield decreased after high-temperature carbonization, from 70.45 to 68.42 wt.%, while the ash content of coke is decreased from 11.82 to 10.05 wt%. The gasification reaction rate of BIOC-HPC coke gradually increases with the increase of BIOC-HPC ratio and the gasification temperature. The optimal ratio of BIOC-HPC in coking is in the range of 10–20 wt.%; the pore size is relatively uniform, about 10–19 nm.