论文部分内容阅读
采用两种不同的升温制度对生物质进行碳化,碳化温度选为300、400、500、600和700℃,保温时间分别为30、60和90 min.利用扫描电镜及热重分析仪对所得生物质焦的成分、微观结构及燃烧性能等进行分析,并研究了制备条件对生物质焦的产率及与CO2反应性的影响.结果表明,生物质焦具有与煤不同的典型管状或片状结构,其N、S、灰分、碱金属含量及燃烧性能优于煤炭,适合用作炼铁过程的还原剂和发热剂,以替代部分煤粉和焦炭.综合考虑,炼铁用生物质焦的最佳制备条件是,采用恒温加热模式将生物质加热至500℃进行碳化,并保温30 min.
Two different heating systems were used to carbonize the biomass, the temperature of carbonization was chosen as 300, 400, 500, 600 and 700 ℃, and the holding time was 30, 60 and 90 min, respectively. The results of scanning electron microscopy and thermogravimetric analysis Material coke composition, microstructure and combustion properties were analyzed, and the effects of preparation conditions on biomass coke yield and CO2 reactivity were studied.The results show that biomass coke has the typical tubular or flaky Structure, its N, S, ash, alkali content and combustion performance is superior to coal, suitable for use as a reducing agent and heating agent in the ironmaking process, to replace part of coal and coke.Taken together, ironmaking biomass coke The best preparation condition is that the biomass is heated to 500 ℃ for carbonization by constant temperature heating mode and incubated for 30 min.