1 / 14

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

justus
Download Presentation

COALS FOR COREX PROCESS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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

More Related