Mineral Processing

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MNP Bldg
MNP Pilot Plant

The thrust is on beneficiation of low grade ores and minerals to meet the requirements of quality raw materials for process industries. The run-of –mine ore normally contains valuable minerals  associated with unwanted gangue minerals. Beneficiation/upgradation of the low grade ores and minerals generally involves combinations of the ore to achieve liberation of valuable minerals from the gangues followed  by their separation exploiting the difference in physical and physico-chemical properties. Laboratory/bench  scale studies involve beneficiation involving classification, gravity separation, magnetic separation, electrostatic/high tension separation and froth flotation. Subsequently process flow-sheets are developed and further validated through pilot scale trials. Under this program extensive studies have been carried out for beneficiation of ferrous, non-ferrous & non-metallic and coals for different sources in the country and many over-seas samples. In addition to beneficiation, agglomeration comprising of Briquetting, Sintering and Pelletization of fine grained concentrate is also an active area of our research. 

R & D Services

Characterization of low grade ores and minerals

Bench and pilot scale beneficiation

Agglomeration (Briquetting, Sintering & Pelletization)

Development of process flow-sheet

Plant trouble shooting

Education and training of personnel


Major Achievements:  

more than 750 investigations have carried out on different types of low grade ores and mineral and  technical know-how  provided for commissioning of mineral processing plants in the areas of ferrous, non-ferrous, metallic & non-metallic minerals and coal to public and private sectors in the country.  

Major Facilities  

Bench scale equipment

Equipment for comminution   (crushing and grinding), classification, gravity separation, magnetic separation, electrostatic/ high tension separation, froth flotation, dewatering and agglomeration. Many advanced separation equipment such as enhanced gravity separators, high intensity magnetic separator, column type flotation cells, dry beneficiation equipment have been added to the facilities

Pilot Plant  facilities  (click here)

Know-how developed

Iron ore washing plants at: Noamundi for Tata Steel, Dalli-Rajhara for Bhilai Steel Plant, Barsua for Rourkela Steel Plant, Gua for Indian Iron and Steel Company, Bolani for Durgapur Steel Plant, Kiriburu for Bokaro Steel Plant, Bailadila for Rastriya Ispat Nigam Ltd. Visakhapatnam, Donimalai for export and for ijayanagar Steel Plant, Kudremukh for export, Kanjamalai for Salem Steel Plant, Daitari Gandhamardan for proposed Paradeep Steel Plant, Goa Iron Ore fines for export and pelletising plant.

For nonferrous ores: Malanjkhand Copper Concentrator for HCL, Rakha Copper Concentrator for HCL, Bandalamattu Lead Zinc Ore Concentrator for Hindustan Zinc Ltd, Copper Lead Zinc Concentrator for Sikkim Mining Corpn.,

For non-metallic minerals: Fluorspar Concentrator for Gujarat Mineral Development Corpn. Ltd., Fluorspar Concentrator for Madhya Pradesh & Maharashtra Minerals & Chemicals Pvt.Ltd., Graphite Plant at Titlagrh, Orissa. Flotation circuits for the coal washeries at Jamadoba for TISCO, West Bokaro for TISCO, Gidi for Central Coalfields Ltd., Dugda for Bharat Coking Coal Ltd.

International Assignment completed:  Iron ores from Egypt, Syria, Nepal, Ukraine, Canada; Copper ores from Nepal and Zambia; Manganese ores from Burma and Phillipines; Lead-Zinc-Graphites from Malaysia and Bhutan; Chromite from  Syria; Beach sand from South Korea; Limestone from Saudi Arabia, Syria and Thailand; Phosphate from Uganda; Coal from Indonesia; Zinc ore from Thailand; Indian Iron ore by Hamersley, Australia                                               

Major Facilities

Image Analysis System, Wild Zoom Stereo Microscope, Micro Hardness Tester, DTA/DTG Analyser, System For Thin S, Reflectivity Measurement, Isodynamic Separator, Heavy Liquid Centrifuge, Laser Particlr Sizer , Laser Zee Meter, Viscometer, Contact Angle, Zeta Potential, Porosimeter, Heating Microscope, Carbon Coating,   Crushing:  Jaw crusher, Roll crusher;  Grinding: Ball mill, Rod mill, Vibro-energy mill;  Classification: Automatic sieve shaker (wet & dry), Micro  Sieves, Tyler sieves, Mozley cyclone;  Gravity Sepn.:  Harz jig, Mineral jig, Wilfley tables, Mozley Vanner   & Mineral separator,  Mullti gravity separator, Kelsey jig, Falcon concentrator; Flotation: Denver D-12 cells, wemco fagergren, deister  flotation  Column system, Jameson cell, NML Column Set up; Electrostatic: High tension, Plate type, & Tribo  Separator; Magnetic Sepn.:Dey & wet high intensity separator,low intensity drum separator, Davis tube, Iuduced roll & Permroll.; Dewatering: Thickner,Drum filter, Wemco filter Kit, Larox pressure filter; Fine Grinding: Planetary Mill (RETSCH),Centrifugal mill ,Vibrating cup mill, Vibro energy mill 

                                                                                               Plot Plant Facilities


Facilities Available
   National Metallurgical Laboratory
Jamshedpur-831007 | Tel: +91-657-2345000-001, 2345028, 2345205 | Fax: 91-6572345213, 2345153 , E-Mail: director@nmlindia.org

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