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A History of Material Charging systems for Blast Furnaces - PowerPoint PPT Presentation


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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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Presentation Transcript
contents
Contents
  • Introduction
  • Background
  • Bell type distributors
  • Bell-less type
  • Gimbal Material Distributor
  • Summary
background raw materials used
Background -Raw Materials used

Pellets,Sinter

Coke

Iron Ore

Plus – Dolomite, limestone etc

background types of furnace charging
Background -Types of Furnace Charging

Skip Charged Furnace

Belt Conveyor Charged Furnace

background furnace top hoppers

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
background charging patterns

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
bell top type single bell distributor
Bell Top Type: Single Bell Distributor

Skip Car

  • Oldest and most Basic
  • Limited accuracy
  • No Pressure seal

Rotating

Chute

Large

Bell

bell top type distributors
Double Bell Distributor

Yawata

Japanese

Large & Small Bell

Bell Top type distributors

Receiving

Hopper

Revolving

Distributor

Small Bell

Large Bell

1970 s bell less type
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
gimbal material distributor
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

gimbal corex
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

gimbal testing and operation india
GIMBALTesting and Operation India
  • 300 tests carried out
  • Pre - Installation Tests
  • Furnace blow-in Sept ’09
  • Increased furnace production
  • Great interest sparked in India
c blast furnace upgrade furnace operating and production data
‘C’ Blast Furnace UpgradeFurnace Operating and Production Data

Tata Steel has achieved the fuel efficiencies shown in the table

summary
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