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Seminário ABM – Maio 2012

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SMS Concast - Brasil. Seminário ABM – Maio 2012. Summary Slide. Layout With Steam Ejectors and Condensers With Mechanical Vacuum Pumps Vacuum System Configuration Vacuum Bag Filter Design 5-Stage Steam Ejector Pumps Mechanical Pump Applications History

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Presentation Transcript
slide1

SMS Concast - Brasil

Seminário ABM – Maio 2012

summary slide
Summary Slide
  • Layout
    • With Steam Ejectors and Condensers
    • With Mechanical Vacuum Pumps
  • Vacuum System Configuration
  • Vacuum Bag Filter Design
  • 5-Stage Steam Ejector Pumps
  • Mechanical Pump Applications
    • History
    • Market Situation for Mechanical Pumps
  • Results
    • Hydrogen Removal
    • Desulphurisation
    • Electric Energy Consumption
    • Final Vacuum Pressure
  • Mechanical Vacuum Pump
    • 3-Stage Mechanical Vacuum Pump
    • Mechanical Vacuum Pump Configuration
    • Mechanical Vacuum Pumps – Blowers / Compressors
    • Main Technical Data
  • Cost Comparison
    • Main Data Comparison
    • Operating Costs
  • Reference Projects
  • Recent References
5 stage steam ejectors pumps

AC

SE5a

SE5b

C2

SE4a

C1

SE3

SE2

SE1

5-Stage Steam Ejectors Pumps
  • 6 Steam Ejectors
  • 2 Steam Condensers
  • Steam flowrate 6.5 tph
  • Water flowrate 358 m3/h @ 35 °C in
  • < 5 min pump-down time
  • Final operating pressure 0.5 torr
general vacuum system design configuration

VD Tank

Vacuum Bag Filter

Mechan.Vacuum Pumps

General Vacuum System Design Configuration
  • One fixed Vacuum Tank
  • One Vacuum Filter
  • One Vacuum Pump
vacuum bag filter design
Vacuum Bag Filter Design
  • SMS CONCAST State-of-the-art pollution control technology
  • Single filter sufficient for VD
  • Reverse jet cleaning with inert gas
  • Filter pressure drop < 0.1 hPa
hydrogen removal
Hydrogen Removal
  • Time at < 1.33 hPa 10-14 min.
  • Hydrogen contents of 1.5/2.0 ppm can easily be achieved
desulphurisation
Desulphurisation
  • Initial S 0.020-0.030 % with some peaksFinal S 0.001-0.006 % without Ca treatment
electric energy consumption
Electric Energy Consumption
  • 0.5-0.9 kWh/t for 22 minutes degassing time
final vacuum pressure
Final Vacuum Pressure
  • Typical final vacuum pressure 0.3-0.4 hPa
3 stage mechanical vacuum pump
3-Stage Mechanical Vacuum Pump
  • 3 Stages
  • Identical, parallel modules
  • Each module consists of roots blowers and 1 screw compressor
  • Required suction capacity determines number of modules
  • Easily expandable
  • No stand-by costs
mechanical vacuum pump configuration

Suction

1st Stage

2nd Stage

3rd Stage

Mechanical Vacuum Pump Configuration
  • Machines mounted on common frame
  • Minimum inter-stage ducting
  • Compact installation – minimized civil works
  • Joint Concast-Edwards vacuum pump concept developed - steel degassing
  • Spare pumps available in England for shipping within 48 hrs
  • Edwards local service workshop in Bairro do Limão, Sao Paulo, Brazil
mechanical vacuum pump s blowers compressors
Mechanical Vacuum Pumps – Blowers/Compressors

Roots blower in 1st and 2nd stages

  • Double-ended screw compressor in 3rd stage
  • Progressive-pitch screws minimise thermal stresses
mechanical vacuum pump
Mechanical Vacuum Pump

2- module mechanical vacuum pump

  • Suction capacity 47 kg/h dry air @ 0.67 hPa, 20 °C
  • Cooling water 6 m3/h
  • Installed power 350 kW
  • Nitrogen purging 4.1 Nm3/h
  • Electric energy consumption VD< 1.6kWh/tonne
  • Pump-down time < 4 min
  • Final operating pressure 0.5hPa ( 0.4 torr)
comparison of operating costs
COMPARISON OF OPERATING COSTS
  • Main cost difference derives from steam and cooling water
  • Operating costs around 3.7 € per tonne lower with mechanical vacuum pumps
others projects of vd with mechanical vacuum pumps
Others Projects of VD with Mechanical Vacuum Pumps

80-tons VD/VOD ORI MARTIN, Italy started up in 2002

75-tons VDVON MOOS, Switzerlandstarted up in 2005

90-tons VDKARDEMIR, Turkeystarted up in 2007

others vd vod references plants
Others VD/VOD References Plants
  • Riva Lesegno, Italy - 80-tonne, VD - single tank with SE pump
  • ORI Martin, Italy, 80-tonne, VOD - double tank with M. pump
  • Gerdau Pinda, Brazil, VD - 100-tonne, revamping SE pump
  • Cogne, Italy, VD - 70-tonne, single tank with SE pump
  • Von Moos, Switzerland, VD - 75-tonne, double tank with M. pump
  • Kardemir, Turkey, VD - 90-tonne, double tank with M. pump
  • Riva Caronno, Italy, VD - 80-tonne, double tank with M. pump
  • MWL, Brazil, VD - 35-tonne; single tank with M. pump
  • Peiner Träger, Germany, VD – 100-tonne, double tank with M. pump
  • Tianjin Iron Steel, China , VD - 90 tonne, double tank with SE pump
  • Vallourec & Sumitomo, Brazil, VD - 140-tonne, double tank with M. pump
eaf new technological highlights melting
EAF New Technological Highlights Melting

Conso Technology

  • Electric Arc Furnaces UHPup to 270 t (AC + DC)
  • Electrical energy down to 200 kWh/t
  • Electrode graphite consumption down to 0.92 kg/t (good billets/blooms)

Enhanced Slag Door