This paper presents an assessment of the tumbling strength and reactivity behaviour of hybrid fuel briquette (HFB) produced from coal and torrefied woody biomass wastes. Briquettes were produced using 97% coal and 3% torrefied biomass with the blend of pitch and molasses in different ratios as a binder. The briquettes were treated in an inert environment at 200–300 °C for a residence time of 60 and 120 min in a tubular furnace. Fourier Transform Infrared Spectrophotometer (FTIR) was used to obtain the functional groups in the raw materials and the HFB. HFB were exposed to tumbling test (TSI_+3mm) after curing and high temperature (1200 °C) exposure. Reactivity test (RI) of the HFB was carried out based on ASTM D5341M-14 standard. The FTIR spectra of the HFB show the presence of aromatic CC bonds and phenolic OH group. The TSI_+3mm of the HFB samples drastically reduced from 95.5–98.3% for the treated to 57.4–77.4% for the samples exposed to 1200 °C. The reactivity indices of the HFB were in the range of 48–56%, which indicated that the HFB were highly reactive. Based on the TSI_+3mm and RI, the HFB are suitable carbonaceous material in direct reduced iron making through rotary kiln.

本文提出了对煤和焙干的木质生物质废物产生的混合燃料团块（HFB）的翻滚强度和反应性行为的评估。使用97％的煤和3％的烘焙过的生物质以及不同比例的沥青和糖蜜的混合物作为粘合剂生产团块。在惰性环境中，将团块在管式炉中于200–300°C的温度下处理60分钟和120分钟。使用傅立叶变换红外分光光度计（FTIR）获得原料和HFB中的官能团。固化和高温（1200°C）暴露后，HFB经受翻滚试验（TSI _{+ 3mm}）。HFB的反应性测试（RI）是根据ASTM D5341M-14标准进行的。HFB的FTIR光谱表明存在芳族碳C键和酚羟基。HFB样品的TSI _{+ 3mm}大幅降低，从经处理的样品的95.5–98.3％降至暴露于1200°C的样品的57.4–77.4％。HFB的反应性指数在48-56％的范围内，这表明HFB具有很高的反应活性。基于TSI _{+ 3mm}和RI，HFB是适用于通过回转窑直接还原铁制造的含碳材料。