ABSTRACT The microwave reduction of a biomass-bearing mill scale composite briquette followed by magnetic separation was investigated in this work to explore the feasibility of using microwave heating technology on steel plant mill scale. The activation energy obtained for pyrolysis of biomass by Freeman-Carroll method was 189.3, 103.26 and 89.82 kJ mol−1 at the temperature ranges of 260–300°C, 330–370°C and 430–480°C, respectively. By comparing the two reducing agents with microwave (MW) heating, the iron content in a magnetic product was approximately 97.15% and 96.46%, respectively, using coal and biomass as the reducing agents. The iron recovery only reached 85.15% with coal. In addition, up to 96.12% of the iron was recycled using biomass fuel as the reducing agent. In particular, the contents of carbon, phosphorus and sulphur using biomass as the reducing agent were far below the content of those using coal as the reducing agent.

中文翻译：

---

微波加热对以木质纤维素生物质为还原剂的钢厂氧化皮碳热还原的影响

摘要 在这项工作中研究了微波还原含生物质氧化皮复合压块并随后进行磁选，以探索在钢铁厂氧化皮上使用微波加热技术的可行性。在260-300°C、330-370°C和430-480°C的温度范围内，通过Freeman-Carroll法热解生物质获得的活化能分别为189.3、103.26和89.82 kJ mol-1。通过微波（MW）加热比较两种还原剂，以煤和生物质为还原剂，磁性产品中的铁含量分别约为97.15%和96.46%。煤的铁回收率仅达到85.15%。此外，使用生物质燃料作为还原剂回收了高达 96.12% 的铁。尤其是碳的含量，