Connecting Science and Technology for a brighter tomorrow

Name : Mr. Ravi Kumar Lingam
Designation : Senior Scientist
Qualification : M.Tech(Chemical Engg.) IIT Kharagpur
Contact Details : Chemical Engineering Block, Pilot Plant Area, CSIR-NEIST, Jorhat – 785006, Assam. Ph: 0376-2370121
Email id :,

Research Interest
  • Scaleup of chemical processes, Process costing, Process intensification
    Phytochemicals extraction, Leaching, Industrial Wastewater Treatment,
    Membrane Separations

  • Tata Steel Ltd Jamshedpur (10 years)
    Researcher - June 2007 to August 2012
    Raw Materials and Coke Making Research Group
    R&D Division
    Principal Researcher – September 2012 to June 2017
    Coal and Coke Making Research Group
    R&D Division
    BriefDescription: Chemical Leaching of Coal – lab scale, Bench scale and Pilot Scale Studies, Pilot Plant operations and Maintenance, Pilot Plant Design



  • A bench scale pressure reactor unit with data acquisition and control system for chemical leaching of minerals (PCT/IN09/000277)
  • A pressure reactor for chemical leaching of minerals at high temperature. (Patent No.406024)
  • An improved agitated pressure Nutsche filter for separation of solids after leaching of minerals using viscous solvents. (Patent No.334604)
  • A process for treating spent acid for removal of impurities consisting of silica alumina and iron bearing compounds generated during leaching method of coal with hydrochloric acid. (Patent No.309931)
  • An improved carbonation reactor system and a process for regenerating spent alkali in an alkali-based coal leaching process. (Patent No. 301122)
  • A two-stage process for separation of silicon/aluminium based compounds from spent acid in a coal leaching process. (Patent No.308350)
  • A novel integrated chemical process flow sheet for demineralization of high ash coal (Patent No.308595)
  • An Autoclave system for coal demineralization (Patent No.412529)
  • An improved bench scale pressure reactor system for chemical leaching of minerals at elevated temperature and pressure (Patent No. 254741)
  • A bench scale pressure reactor system for extracting minerals and metals in a chemical leaching process (Patent No.265710)
List of Publications (Most Recent Ten)
Total No. of Publications: 6
  • S. K. Sriramoju, A. Suresh, R. K. Lingam & P. S. Dash, Mechanism of a Coal Chemical-Leaching Process and Recovery of Spent Chemicals: A Pilot-Scale Study, International journal of coal preparation and utilization,Volume 37 (2017) Issue 6,Pages 293-302.
  • S. K. Sriramoju, A. Suresh, R. K. Lingam, T. Ray, P. S. Dash & P. K. Banerjee,Optimization of Process Conditions for Leaching ofMiddling Coal,International journal of coal preparation and utilization,Volume 38 (2018) Issue 2,Pages 88-97.
  • Hari Prakash Tiwari, Rajesh Kumar, Arunabh Bhattacharjee, Ravi Kumar Lingam, Abhijit Roy and Shambu Tiwary, Prediction of operating parameters range for ammonia removal unit in coke making by-products, Metallurgical Research & Technology, Volume 115,Number 2,211(2018).
  • P.S. Dash , R.K. Lingam , S. Santosh Kumar , A. Suresh, P.K. Banerjee , S. Ganguly ,Effect of elevated temperature and pressure on the leaching characteristics of Indian coals, Fuel, Vol.: 140, 2015,pp 302–308
  • Ravi Kumar Lingam, A. Suresh, Pratik Swarup Dash, Santosh Kumar Sriramoju, and Tathagata Ray,Upgrading coal washery rejects through caustic-acid leaching,Mineral Processing and Extractive metallurgy review,2016,Vol:37,No 2,PP 69-72
  • A. Suresh , R.K. Lingam, S.K. Sriramoju, A. Bodewar, T. Ray, P.S. Dash,Pilot scale demineralization study on coal flotation tailings and optimization of the operational parameters with modeling,IJMP,145(2015)23-31
  • Pratik S. Dash, D. N. Prasad, Santosh K. Sriramoju, R. K. Lingam, A. Suresh, P. K. Banerjee and S. Ganguly,Maximizing demineralization during chemical leaching of coal through optimal reagent addition policy, Chemical Product and Process Modeling, Volume 10,Issue 1,2015
  • H. P. Tiwari, S. K. Haldar, S. Dutta, and R. K. Lingam, Heat recovery stamp charged coke making : An experience in Operational excellence,Coke and chemistry,2015,Vol 58,No 11,pp 432-441
  • Ravi Kumar Lingam, Pratik Swarup Dash and P.K. Banerjee,Production of Low Ash Clean Coal in India: An Essential Step towards Energy Security and Environmental Protection, steel tech, vol 7, No: 1, October 2012.
Awards and Fellowship
  • Tata Innovista 2012 (The Leading Edge: Proven Technology – Tata Group)
  • Global RD&T Best Project Award 2012 (Innovation category- Tata Steel Group)
Membership in Professional Bodies
  • Life member in Indian Society for Translational Research
  • Life Member in Indian Institute of Metals
  • Life Member in Indian Institute of Mineral Engineers
  • Life Member in The Mining, Geological and Metallurgical Institute of India
Conferences and workshop
  • CHEMCON 2009 ,Andhra University, Visakhapatnam – Oral Presentation
  • MPT 2010,CSIR-NML, Jamshedpur – Oral Presentation
  • IMPC 2010,Brisbane,Australia – Poster Presentation
  • Participated in Workshop on scale-up studies 2014 (IIME Jamshedpur chapter)
  • Spearheaded sponsor committee of International conference on beneficiation of fines ‘ICBENEFIT 2007’ in Jamshedpur
  • Participated in IP workshop 2015 organized by Tata Group
  • Participated in TRIZ and Technology Roadmap workshop 2015 organized by Tata Group
  • Participated in Finance and Procurement for Officersworkshop 2015