Dr. H P Tiwari
Dr H P Tiwari received his postgraduate degree from BIT, Mesra, Ranchi in Fuels and Combustion. He obtained his PhD degree in Cokemaking from IIT (ISM) Dhanbad. Published more than 50 research papers in national and international journals, filed few patents and also write book chapters. He is a reviewer of more than ten high impacts research papers /research Journal in the area of coal and coke. Prior to the present company (JSPL), he worked with Tata Steel Limited in the areas of raw material and Cokemaking. He also has work experience with BPSL, Jharsuguda and JSPL, Raigarh.
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Papers by Dr. H P Tiwari
tion 1.6 mtpa of heat recovery coke plant for the first time. This paper briefly described the operational philosophy evolved in heat recovery coke plant to produce desired quality coke at comparatively lower cost
through operational excellence. The reduction of imported prime hard coking coal in coal blend up to 30% without affecting coke quality adversly and understanding the operational processes and finally mastering heat recovery coke making technology was also part of this paper.
The study shows the actual plant coke CSR and predicted coke CSR of same coal blend were much closer proximity. Actual plant data have been used for developing and validation of the model. The technique was successfully used to produce superior coke from the same coke oven batteries without damaging the oven health.
revealed considerable changes in coke properties in the lower furnace regions. With increased use of Pulverized Coal Injection, improved hot coke strength will be required for efficient and consistent performance in
the furnace. The present study revealed that the CSR of coke produced by stamped charged coke making process is mainly influenced by the properties of coal like petrography, coal ash chemistry and rheology. In stamp charging condition, to produce coke with high CSR value, it is necessary to select coals with appropriate ash chemistry, petrographic properties and rheological properties must be maintained. The coal blends which improve the coke CSR beyond a certain limit generate high oven wall pressure. The investigation results show that for producing greater than seventy CSR, coal basicity, fluidity temperature range and inertinite value must be less than 0.2, minimum 90°C and 32 volume % respectively.
In the present study, the relation between dilation characteristics of the coal blends has been investigated by the
Audibert-Arnu Dilatometry test. The behavior of different coal blends has been studied to determine the effects of
dilation of coal blend on coke CSR and push force. Coke plant data have been used for assessing the impact of dilation of coal blend on coke CSR and oven health. Results showed that dilation of coals blend is important parameters for controlling the coke quality and push force. The influence of some other important parameter on coke quality was also made in this study.