ABSTRACT

Coke plays multiple roles in blast furnace operation. Preparation of formed coke from inferior coal provides an alternate way to utilize inferior coal for metallurgical uses. In this process briquettes of coal, char were prepared to produce similar properties to the conventional coke and sufficient strength to maintain the shape during transport, storage and utilization. In this study formed coke was prepared using devolatilized coal at different temperature. The effect of use of this devolatilized coal was studied in terms of point crushing strength. In general, it was observed that higher devolatilization temperature (550 °C) and longer duration (3 hr) increases the point crushing strength and fixed carbon. Fast volatilization process during carbonization significantly decreases the coke mechanical strength. The use of devolatilized coal reduces the volatile matter content and in turn reduces the fast volatilization which increase the point crushing strength.

摘要

焦炭在高炉操作中发挥着多种作用。用劣质煤制备型焦，为劣质煤的冶金用途提供了另一种途径。在此过程中，制备的煤、焦炭具有与传统焦炭相似的性能，并且具有足够的强度以在运输、储存和使用过程中保持形状。在本研究中，使用脱挥发分煤在不同温度下制备型焦。从点破碎强度方面研究了使用这种脱挥发分煤的效果。一般来说，观察到较高的脱挥温度（550°C）和较长的持续时间（3小时）会增加点压碎强度和固定碳。干馏过程中的快速挥发过程显着降低了焦炭的机械强度。