The utilization of liquefaction solid product (LSP) obtained from fluidization reaction pyrolysis has become a pressing obstacle limiting the industrialization of coal liquefaction technology. In this work, gasification of LSP and Hami lignite coal (LC) and their blend at different ratios was investigated. In addition, the melt flow, mineral transformation, and crystallization behavior in the fusion process and cooling process were investigated. The results show that both LSP and LC are typical crystalline slags and cannot be applied to entrained flow gasification alone. The co-gasification of LC and LSP is a feasible method to improve their fluidity. At the ratio of 2:1 (LC to LSP), the blend has the lowest AFT. For molten slag, viscosity of the sample corresponded well to the structure of the slag. LC1:2LSP with higher Q² and Q³ content showed a high viscosity, while LC1:2LSP with higher Q⁰ and Q¹ content showed a lower viscosity. Besides, the size of the crystals generated during cooling is inversely proportional to the high-temperature viscosity of the sample, the migration of ions became difficult, and the growth of crystal size was inhibited at high viscosity. Meanwhile, the slag type of samples was influenced by the precipitated crystals. T_cv can be effectively reduced by blending LC with LSP in a certain proportion. The results provide a theoretical basis for the utilization of LSP for the operation of entrained flow gasification.

中文翻译：

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液化固体产物灰渣的流动性与褐煤共气化研究

流化反应裂解得到的液化固体产物（LSP）的利用已成为制约煤液化技术产业化的紧迫障碍。在这项工作中，研究了 LSP 和哈密褐煤 (LC) 的气化以及它们在不同比例下的混合物。此外，还研究了熔融过程和冷却过程中的熔体流动、矿物转化和结晶行为。结果表明，LSP和LC都是典型的结晶渣，不能单独应用于气流床气化。LC和LSP的共气化是提高其流动性的可行方法。在 2:1（LC 与 LSP）的比例下，混合物的 AFT 最低。对于熔渣，样品的粘度与熔渣的结构非常吻合。具有更高 Q 的 LC1:2LSP²和Q ³含量较高的LC1:2LSP 表现出较高的粘度，而具有较高Q ⁰和Q ¹含量的LC1:2LSP 表现出较低的粘度。此外，冷却过程中产生的晶体尺寸与样品的高温粘度成反比，离子迁移变得困难，在高粘度下晶体尺寸的增长受到抑制。同时，样品的渣类型受析出晶体的影响。将LC与LSP按一定比例混合可有效降低T _{cv 。}研究结果为利用LSP进行气流床气化操作提供了理论依据。