Effect of Indian Medium Coking Coal on Coke Quality in Non-recovery Stamp Charged Coke Oven

作     者：H.P.Tiwari P.K.Banerjee V.K.Saxena S.K.Haldar 

作者机构：Raw Material and Coke Making Research GroupResearch and Development DivisionTata Steel Ltd.Jamshedpur 831001JharkhandIndia Department of Chemical EngineeringIndian School of Mines Coke PlantsTata Steel Ltd.Jamshedpur 831001JharkhandIndia 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2014年第21卷第7期

页      面：673-678页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

主　　题：Indian coking coal imported coking coal CCP CSR M40 non-recovery stamp charged coke making 

摘      要：The maximum possibility of utilizing the Indian coking coals and inferior grade coking coal for producing metallurgical coke through non-recovery stamp charging tech_nology was investigated. Indian indigenous coals contained low percent of vitrinite （〈50%） and higher content of ash （〉15%） compared to imported coking coal. Therefore, the selection of appropriate proportion of different types of coals was a major challenge for coke makers. Coal blend selection criterion based on a single coefficient, named as composite coking potential （CCP）, was developed. The use of increased proportion of semi-soft coal （crucible swelling number of 2.5） and high ash （≥15%） indigenous coal in the range of 20%- 35% and 20%-65% respectively in the blends resulted in good quality of coke. Plant data of a non recovery coke oven were used for developing and validating the model. The results showed that the coke strength after reaction （CSR） varied in the range of 63.7%-67.7% and the M40 value was between 81.8 and 89.3 in both the cases.