Novel insights into the reoxidation of direct reduced iron (DRI) during ball-mill treatment: A combined experimental and computational study. Jiayuan Li, Zhikai Liang, Lingyun Yi, Boyang Huang, Jun Chen, Hetong Han, Zhucheng Huang.Novel recycling of phosphorus-recovered incinerated sewage sludge ash residues by co-pyrolysis with lignin for reductive/sorptive removal of hexavalent chromium from aqueous solutions. Qiming Wang, Jiang-shan Li, Chi Sun Poon.Transferring behavior and reaction kinetics of saprolitic laterite during metalized reduction in the presence of calcium fluoride. Weijiao Yang, Baozhong Ma, Xiang Li, Die Hu, Chengyan Wang, Hua Wang.Coal ash induced ring formation in a pilot scale rotary kiln for low-grade iron ore direct reduction process: Characterization and mechanism. Lingyun Yi, Nan Zhang, Zhikai Liang, Lin Wang, Huarong Xiao, Zhucheng Huang.Determining the kinetic rate constants of Fe3O4-to-Fe and FeO-to-Fe reduction by H2. Asia-Pacific Journal of Chemical Engineering 2022, 17 Synthesis of zeolite A with high whiteness from coal gangue by two‐step pretreatment method. Shanfang Liu, Shuo Yan, Yun Li, Jilin Cao.Synergetic conversion laws of biomass and iron ore for syngas and direct reduced iron co-production. Lingyun Yi, Nan Zhang, Haowen Hao, Lin Wang, Huarong Xiao, Guanghui Li, Zhikai Liang, Zhucheng Huang, Tao Jiang.Separation of Fe from wastewater and its use for NOx reduction a sustainable approach for environmental remediation. Hafiz Muhammad Adeel Sharif, Moazzam Ali, Ayyaz Mahmood, Muhammad Bilal Asif, Muhammad Aizaz Ud Din, Mika Sillanpää, Asif Mahmood, Bo Yang.A link between materials conversion and external field condition during the rotary kiln reduction course was established, providing technical support for further optimization of this process. To understand this process in depth, in situ dissection research for the pilot-scale rotary kiln reduction process was performed, investigating the temperature field distribution, the iron and silicon minerals transition, and the iron grains formation and growth. Compared to the existing processes, this novel process presents advantages of efficient reduction (only 24–32 min for high temperature reduction) and eco-friendliness (energy consumption: 8.98 GJ/t-DRI CO 2 emission: 800–1100 kg/t-DRI), showing a broad range of application prospects in the resource development and utilization of the same type. Then, 91.75% of iron can be recycled in the form of iron powder (iron grade reached 93.10%), followed by a grinding–magnetic separation process. A pilot-scale rotary kiln (φ1.5 m × 15 m) research study proved that products with a metallization ratio of 85.15% can be obtained by this low-temperature but rapid reduction process as ore–coal composite was roasted within temperature zone (1173–1264 K) for 24–32 min. In this paper, a novel and green metallurgical technique of highly efficient iron recovery from refractory low-grade iron ores was proposed. However, the utilization of refractory low-grade iron ore resources has always been a challenge for the metallurgical industry. With the shortage of high-grade iron ore resources, there is an increasing demand to utilize low-grade iron ores.

Oolite growth rate diagram