Petrographic investigation of selected natural cokes from Damodar Valley coalfields

Sharma, Mamta and Singh, Ashok K and Shukla, N K and Srivastava, S K and Bhattacharyya, K K (2008) Petrographic investigation of selected natural cokes from Damodar Valley coalfields. In: International Seminar on Mineral Processing Technology (MPT-2008) , April 22-24, 2008, Trivandrum,INDIA.



The natural coke is a kind of fossil fuel and its reserves are scattered in almost coalfields covering approx. 2600 Km 2. In Indian coalfields, the igneous intrusion varies, causing regional in-situ burning of coal seams. The intrusion process itself is quite complex and does not follow any fixed trend everywhere. The chemical composition of the intrusion also varies from place to place. Petrographic, physical and chemical characterizations of some selected natural coke samples of Damodar Valley coalfields were done. The comprehensive study on above samples helped a lot in differentiation of natural cokes, slightly heat affected coal and normal coals obtained after washability at different specific gravities. The yield of the samples after washability varied from sample to sample. Through petrographic studies by microscopy, an effort has been made to decipher the new classification schemes for microtextures and microstructures of natural coke, which are generated through in-situ carbonisation of coal seams. Isotropic, anisotropic components and mineral matters were differentiated. Some selected natural coke fractions were explored for value addition in different studies. The study was helpful in establishing industrial use of natural coke in Power, Cement and Carbon Artifact industry.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:
Uncontrolled Keywords:Natural coke (jhama), petrography, anisotropy, anisotropy, industrial use
Divisions:Mineral Processing
ID Code:5689
Deposited By:Dr. A K Sahu
Deposited On:04 Jul 2012 10:46
Last Modified:04 Jul 2012 10:46
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