ABSTRACT The influence of anthracite unburned pulverized coal (AUPC) on the properties of coke at high temperature was studied using the thermogravimetric equipment. The micro morphology and mineral transformation were analyzed by scanning electron microscope with energy spectrum (SEM-EDS) and X-Ray diffracton (XRD) in present research. The results show that CO2 preferentially reacts with AUPC, making SiC easier to form and wet the slag, which can enter pores and passivate gas from entering. Meanwhile, AUPC ash generates chemical reaction with coke ash to form yoshiokaite and calcium iron oxide that has a lower melting point than mullite and decrease the viscosity of ash slag, allowing SiO2 to diffuse quicker to the coke surface and react to SiC, enabling quicker wetting. Besides, CaO may also catalyse gasification reactions. The ash wetting and catalysis of iron or CaO might shift inner-pore gasification to the outside and delaying the degradation of coke.

中文翻译：

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未燃煤粉对高炉焦炭特性影响的评价

摘要 利用热重设备研究了无烟煤未燃煤粉（AUPC）对焦炭高温性能的影响。本研究采用能谱扫描电子显微镜（SEM-EDS）和X射线衍射（XRD）对微观形貌和矿物转变进行了分析。结果表明，CO2 优先与 AUPC 反应，使 SiC 更容易形成和润湿炉渣，从而进入孔隙并钝化气体进入。同时，AUPC灰与焦灰发生化学反应，形成比莫来石熔点低的yoshiokaite和氧化铁钙，降低灰渣的粘度，使SiO2更快地扩散到焦炭表面并与SiC反应，实现更快的润湿. 此外，CaO 还可以催化气化反应。