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COALS FOR COREX PROCESS

COALS FOR COREX PROCESS. dr kalyan sen, Director Central Fuel Research Institute, P.O. FRI, Dhanbad 828108. IRON ORE : proven 13460 Mt. Resource. BIHAR, ORISSA, M.P, KARNATAKA and GOA. Reserves, Bt Haematite - 9.6 Magnetite - 3.1. WHY NOT COKE-OVEN BF ROUTE ?. High cost involvement

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COALS FOR COREX PROCESS

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  1. COALS FOR COREX PROCESS dr kalyan sen, Director Central Fuel Research Institute, P.O. FRI, Dhanbad 828108 COREX 2000

  2. IRON ORE: proven 13460 Mt Resource BIHAR, ORISSA, M.P, KARNATAKA and GOA • Reserves, Bt • Haematite - 9.6 • Magnetite - 3.1 COREX 2000

  3. WHY NOT COKE-OVEN BF ROUTE ? • High cost involvement • Stringent specifications of raw materials • not eco-friendly COREX 2000

  4. SR PROCESS • COREX (Voest Alpine, Australia ) • HISMELT (Hismelt Corpn., Australia) • DIOS ( JISF, Japan) • AISI (DOE, USA) • ROMELT (Moscow Inst. Steel & Alloy, Russia) COREX 2000

  5. WHY COREX PROCESS • Flexibility in raw materials • medium to low grade iron ore • iron waste & scraps • non-coking/ LVC coals • Less sensitive to physico-chemical characteristics of coal • Eco-friendly • Low capacity, low investment cost COREX 2000

  6. QUALITY PARAMETERS for COREX PROCESS Preferred limit, % FC > 55 VM <20 increse less Gasifn. Temp., low FC high heat demand, soot Moist 5-7increaseless Gasifn. Temp., difficulty in flow of coal Ash <20reducehigh FC low coal rate, less slag low Si - level COREX 2000

  7. Total Coal Reserves 209 Bt Others 6% Semi-coking 11% HVC 3.0% 15% MVC 14.0% 83.0% 50% LVC Coking Non- coking 19% Prime coking COAL SCENARIO IN INDIA COREX 2000

  8. Availability of Coal for COREX process COREX 2000

  9. Deposits of iron ore/ Coal COREX 2000

  10. Judicious beneficiation of available coal is a necessity COREX 2000

  11. Beneficiation strategy Category I: Non-coking coal (ash 30-40%) Jigging Cleans 75-80% (ash 25%) Reject (ash 60-65%) (FBC boiler) COREX 2000

  12. Beneficiation strategy …... Category II: Non-coking coal (ash > 40%) X 100/75 mm 20/25 mm screen Oversize, A >45% Undersize, A <40% Jig Deep washing Cleans (40-45%) (A 34%) Power house Cleans (30-35%) (A <25%) Corex plant Reject (ash 55-65%) (FBC boiler) COREX 2000

  13. Beneficiation strategy …... Category III: LVC coal (ash > 35%) 3-pdt Jig4-pdt washingUser Yld% (A%) Yld% (A%) Total Cls --- 24-27 (17-18) Steel Jig Cleans 50 (22-24) -- Corex Cleans II --- 18-20 (25-30) Corex** Middling 20-22 (34) 20-22 (33-35) Power Reject 28-30 (60-65) 25-30 (55-65) FBC COREX 2000

  14. REMARKS THE PROCESS EXHIBITS A POSITIVE PROFILE UNDER INDIAN CONTEXT HOWEVER, DETAILED STUDIES ON IDENTIFICATION OF SUITABLE SOURCES AND CHOICE OF WASHING STRATEGY IS NECESSARY COREX 2000

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