ABSTRACT

Coke producers are facing a tough challenge to produce good quality metallurgical coke at reasonable price due to decreasing availability and increasing cost of good quality hard coking coal.The use of alternative carbon source like non-coking bituminous coal, heat altered coking coal (Jhama), petcoke can be a way to address the problem. In this article, the effect of preheating and stamp charging of coal on coke quality parameters were studied and compared with the properties of coke produced in top charging and stamp-charging process. The effect of coal preheating before compaction on the properties of resulting cokes has been studied using five different types of coals. Five coal samples with different coking properties have been selected for the study. The Coal samples have been preheated to their tarification level and then stamped for compaction to higher bulk density before carrying out high-temperature carbonization. The most significant differences between cokes from preheating then compaction were observed in terms of CRI and CSR value. Significant differences of properties have been observed between coke samples produced in preheating followed by stamp-charging and the coke samples produced in top charging and normal stamp-charging technique.

摘要

由于优质硬焦煤的可用性降低和成本增加，焦炭生产商面临着以合理的价格生产优质冶金焦的严峻挑战。使用非焦化烟煤、热变焦煤 (Jhama) 等替代碳源，石油焦可以成为解决问题的一种方式。本文研究了煤的预热和冲压装煤对焦炭质量参数的影响，并与顶装和冲压装煤过程中产生的焦炭的性能进行了比较。使用五种不同类型的煤研究了压实前煤预热对所得焦炭性能的影响。选择了五个具有不同焦化特性的煤样进行研究。煤样已预热至其焦油化水平，然后在进行高温碳化之前冲压以压实至更高的体积密度。在 CRI 和 CSR 值方面观察到焦炭从预热到压实之间最显着的差异。已观察到在预热后冲压装料生产的焦炭样品与顶部装料和普通冲压装料技术生产的焦炭样品之间存在显着的性能差异。