Exposure of refractory materials during high-temperature gasification of a woody biomass and peat mixture
Exposure of refractory materials during high-temperature gasification of a woody biomass and peat mixture
复制标题
DOI：
10.1016/j.jeurceramsoc.2017.09.016
复制
发表时间：
2018-02
影响因子：
5.7
通讯作者：
M. Carlborg;F. Weiland;Charlie Ma;R. Backman;I. Landälv;H. Wiinikka
中科院分区：
文献类型：
--
作者：
M. Carlborg;F. Weiland;Charlie Ma;R. Backman;I. Landälv;H. Wiinikka
为造渣气化系统寻找有弹性的耐火材料有可能通过延长使用寿命来降低成本和提高工厂的整体利用率。在本研究中，不同的耐火材料在炉渣气化条件下进行了评价。耐火探头在常压吹氧气流气化炉中连续暴露长达27小时，燃烧时使用树皮和泥炭粉的混合物。用扫描电子显微镜、能谱仪研究了渣的渗入深度和显微组织。用粉末X射线衍射仪对其晶相进行了鉴定。来自耐火材料的铝含量在所有炉渣中都有所增加。熔融浇注材料受到的影响最小，即使仍然可以观察到溶解和熔渣渗透。对耐火材料和炉渣混合物进行了热力学平衡计算，预测了相组合，估算了液体部分的粘度。
Finding resilient refractory materials for slagging gasification systems have the potential to reduce costs and improve the overall plant availability by extending the service life. In this study, different refractory materials were evaluated under slagging gasification conditions. Refractory probes were continuously exposed for up to 27 h in an atmospheric, oxygen blown, entrained flow gasifier fired with a mixture of bark and peat powder. Slag infiltration depth and microstructure were studied using SEM EDS. Crystalline phases were identified with powder XRD. Increased levels of Al, originating from refractory materials, were seen in all slags. The fused cast materials were least affected, even though dissolution and slag penetration could still be observed. Thermodynamic equilibrium calculations were done for mixtures of refractory and slag, from which phase assemblages were predicted and viscosities for the liquid parts were estimated.