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Updated: 01.07.2017

Coal Technology


CT & Laboratory Services division of CMPDIL is a center for excellence in resource quality evaluation, beneficiation and proper utilization of coal/lignite and minerals. Expert services are offered with highly skilled manpower and state-of the art equipments for characterisation of coal and lignite through chemical, petrographic and washability route supported by coal technologist for end use. The quality and washability data generated during the last two decades formed the basis for deciding grade of coal in Geological Reports and mine feasibility reports, designing of washeries, and further down stream utilization. To meet the relate industry’s requirement , continuous R&D activities are carried out. CT & Laboratory Division consisting of Chemical, Petrography, Coal Preparation, CBM Laboratories and Coal Technology unit. Services offered by each unit is given below:


Basic services offered:


Chemical Laboratory Chemical analysis of coal is essential for characterization, utilisation, commercial grading and marketing purposes. For utillisation of coal in different industries such as power, steel, cement, fertilizer, railways, domestic consumption, brick kiln, textile, sugar, tea, glass, pottery, refractory, carbon industries and other chemical industries, characterization of coal is essential.

The broad activity of the chemical laboratory starts from collection of coal samples from different sources viz. coal core, ROM samples, channel samples etc to analyse of various parameters.


Sampling & Sample Preparation


  • Sampling of Coal / Lignite
  • Preparation and Processing of Samples


Chemical Analysis for Coking and Non-coking Coal & Lignite


  • Proximate analysis by both conventional & microprocessor based equipments
  • Moisture% at 60% RH & 400C
  • Calorific Value
  • Ultimate analysis & Carbonate CO2
  • Phosphorus
  • Ash Analysis & Ash Fusion Temperature Range (AFTR)
  • LTGK Coke Type & Swelling Index
  • Plastometric Study
  • Specific Gravity


Coal Petrography Laboratory


CMPDI’s Coal Petrography Laboratory is one of the leading laboratories of India to undertake the characterization of coal/lignite, source rock evaluation for hydrocarbon generation at the exploration stage, washery product, and quality control of Indian/imported coal . Coal Petrography study is essentially microscopic study of coal (maceral composition, vitrinite reflectance & v type distribution ) which plays an important role for blending of coal in coke making and charaterisation of coking and non-coking coal for its end use .

The Coal Petrography Laboratory from time to time has upgraded itself with the induction of state of art automatic equipment for rapid/detail determination of both organic and inorganic constituent of coal. It is only laboratory in India to achieve accreditation of ICCP (International Committee for Coal Petrography).

With its highly trained and dedicated manpower and sophisticated/imported equipment, the Laboratory is in a position to undertake following analysis :


Coal characterization for coal exploration, Washery product control, Blend studies for coking as well as for non-coking coals


  • Maceral Analysis
  • Vitrinite Reflectance%
  • V type Distribution
  • Minerals in Coal


Coke Petrology


  • Pore Structure
  • Pore Size & Pore Size Distribution
  • Mosaic Size
  • Fracture Sharacteristics



Oil and Gas Exploration


  • Vitrinite Reflectance
  • Maceral Analysis, Liptinite (Exinite) Fluorescence
  • Maturation Potential
  • Thermal History Studies


Oil Shales


  • Maceral Analysis
  • Liptinite (Exinite) Fluorescence
  • Vitrinite Reflectance


Mineralogical Phase Analysis


  • Qualitative and Quantitative Study of Minerals and Phases through X-Ray Diffractometer
  • Shape, size of minerals in coal/metal/rock and cleat study of coal for CBM exploration is being carried out by SEM


Coal Preparation Laboratory


The Coal Preparation Laboratory is one of the leading laboratory in the country for laboratory scale coal washability study and characterization of ROM coal, washery rejects bore hole samples. This lab also undertakes comprehensive washability studies on coal samples as per the requirements of the client.

The basic services offered by the Laboratory are as follows:

  • Sampling of ROM coal
  • Size Analysis
  • Washability (float & sink) Study
  • Determination of Characteristics of Fine Coal (-0.5mm)
  • Determination of Shattering & Pulverizing Characteristics of Coal
  • Drum Tumbler Test
  • Assistance in Planning and Design of Coal and Mineral Beneficiation Plants
  • Assistance in performance tests of washeries


Coal Bed Methane (CBM) Lab


  • Gas Desorption Study
  • Construction of Adsorption Isotherm
  • Gas Composition Study
  • Mobile Unit for collection of Coal Cores


Coal Technology


Coal is a versatile energy resource, which may be burnt directly to generate electric power/process steam or converted to domestic fuel, a wide variety of gaseous and liquid fuels and feed stocks for many metallurgical and chemical industries.

Coal technology is a broad term, which covers several utilization methods like burning in conventional boilers and furnaces for the generation of electric power and process steam besides such techniques applied to combustion of coal in order to achieve greater efficiency with due consideration to environmental protection. It also covers other areas that process the coal to feedstock for metallurgical & domestic purposes, chemicals and other industrial purpose by way of carbonization, gasification, liquefaction etc.

The services offered by the Division is given as follows:

  • Technical support to CIL/MOC in the field of Coal Utilisation
  • Assessment of characteristic of coal for proper utilisation
  • Process and technology selection
  • Capacity assessment for various coal consuming industries
  • Coal testing with respect to coal blend programme and domestic fuel production
  • Design, know how and commissioning of SSF plants
  • Project Report preparation for Coal Carbonisation, SSF Plants trouble shooting in old Coke Ovens
  • Characterisation of coal for use in Sponge Iron Industry


On going CIL, R&D Projects


  • Characterisation of cleats in coal from Raniganj and Jharia Coalfield
  • Resource assessment and characterisation of non coking coals for Sponge Iron Industry


On going S&T Schemes


  • Development of cheap energy efficient by-product coke oven for production of hard coke for steel/metallurgical
  • Development of process/technique for utilisation of less matured non coking coal for making hard coke by utilising stamp charging
  • Agglomeration formation in reducing condition in Pressurised Fluidised Bed Gasification(PFBG) with low rank high ash.