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A History of Material Charging systems for Blast Furnaces

A History of Material Charging systems for Blast Furnaces. Contents. Introduction Background Bell type distributors Bell-less type Gimbal Material Distributor Summary . Background - Raw Materials used. Pellets, Sinter. Coke. Iron Ore.

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A History of Material Charging systems for Blast Furnaces

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  1. A History of Material Charging systems for Blast Furnaces

  2. Contents • Introduction • Background • Bell type distributors • Bell-less type • Gimbal Material Distributor • Summary

  3. Background -Raw Materials used Pellets,Sinter Coke Iron Ore Plus – Dolomite, limestone etc

  4. Background -Types of Furnace Charging Skip Charged Furnace Belt Conveyor Charged Furnace

  5. Moving or Rocking Chute Upper Seal Valve Material Hopper Lower Seal Valve Material Flow Control Gate Background -Furnace Top Hoppers • Upper Seal valve opens • Hopper filled with material • Upper Seal valve closes • Hopper pressurised above furnace operating pressure • Lower Seal valve and Material Flow gate opens • Lower Seal valve and Material Flow gate closes

  6. NUT COKE MIXING WALL CENTRE CHUTE ANGLE 1 2 3 4 5 6 7 8 9 10 11 COKE LARGE ORE CENTRE COKE SMALL SINTER Background -Charging Patterns

  7. Bell Top Type: Single Bell Distributor Skip Car • Oldest and most Basic • Limited accuracy • No Pressure seal Rotating Chute Large Bell

  8. Double Bell Distributor Yawata Japanese Large & Small Bell Bell Top type distributors Receiving Hopper Revolving Distributor Small Bell Large Bell

  9. 1970’sBell-Less Type • Rotating and tilting distributor • Better distribution of burden • More complicated and expensive • Including: • Paul Wurth Top • Wooding’s BLT • Zimmerman & Jansen • Totem

  10. Gimbal Material Distributor Distributor Housing Fixed Centre Chute Operating Shaft in bearings Connecting Rod & Universal Joints Hydraulic Cylinder Protection Sleeve Gimbal Rings Tilting Chute The SIMETALCIS Gimbal Top® Distributor

  11. GimbalCOREX Charging bin COREX® Reduction Shaft • Direct reduction of Iron Ore • Mixing of Ore and Coal • Gimbal developed in 2003 • Operating Conditions: • 5 bar g • >900 oC Material gate (flow control) Gimbal distributor Reduction ShaftTop flange

  12. GIMBALTesting and Operation India • 300 tests carried out • Pre - Installation Tests • Furnace blow-in Sept ’09 • Increased furnace production • Great interest sparked in India

  13. ‘C’ Blast Furnace UpgradeFurnace Operating and Production Data Tata Steel has achieved the fuel efficiencies shown in the table

  14. Summary • Material used in Blast Furnaces • Material reaches furnace top • Furnace top hoppers • Distribution of material • Bell type distributors • Bell less type distributors • Gimbal distributor

  15. Thank you for Listening Any Questions?

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