ABSTRACT

The amount of coking coal in all over the world is scarce while it is an essential commodity for steel making; in an economical way, no alternative of coking coal is found out till now. Though, so many researches have already been there to understand its properties specifically its plasticity behavior, it requires a deeper understanding concerning the coal plasticity. Hence, to compare and correlate, five coking coals were chosen from different countries which are used for metallurgical purposes throughout the world. Basic characterization, i.e. proximate and ultimate analyses and petrography were done with the measurement of plasticity, dilation, and swelling properties of the studied samples. Detailed petrographic studies reveal the interrelationship between the different kinds of macerals and the fluidity of coking coals. The vitrinite group of macerals has a positive relationship while the inertinite and the liptinite group of macerals have both positive and negative correlation with the plasticity of a particular coal. Hence, this study focuses to build a profound understanding about the role of all the macerals and other characteristics of coal, i.e. volatile matter, rank, etc., in coal plasticity.

摘要

炼焦煤是炼钢必不可少的商品，世界范围内的炼焦煤数量稀少；以经济的方式，到目前为止，还没有找到焦煤的替代品。尽管已经进行了如此多的研究来了解其特性，特别是其可塑性行为，但还需要对煤的可塑性有更深入的了解。因此，为了比较和关联，从不同国家选择了五种炼焦煤，用于世界各地的冶金目的。基本表征，即近似和最终分析和岩相学是通过测量研究样品的可塑性、膨胀和膨胀特性来完成的。详细的岩相学研究揭示了不同种类的矿物与炼焦煤流动性之间的相互关系。微晶质的镜质体组与特定煤的可塑性呈正相关，而惰质体和亮晶体组与煤的塑性有正相关和负相关。因此，本研究的重点是深入了解煤的所有物质和其他特性（即挥发物、等级等）在煤可塑性中的作用。