A solution for energy and yield optimization in the electric arc furnace by using the INTECO/PTI designed SwingDoor TM

Transcription

1 A solution for energy and yield optimization in the electric arc furnace by using the INTECO/PTI designed SwingDoor TM by Martin Leber, CEO Process Technology International

2 Inteco Group General Information INTECO special melting technologies GmbH has been founded in 1973 as a wholly private company with the objective to provide supply and services to the metals and related industries Worldwide with over 400 employees. Product Portfolio and Customers Services Pre-Investment Studies Engineering Projektmanagement Trainings Consulting Special Metallurgy Electroslag Remelting Vacuum Arc Remelting Vacuum Induction Melting and Pouring Steelplant Technology Electric Arc Furnaces Ladle Furnaces VD / VOD Plants Ingot Casting Continuous Casting Customers: Steelmaking Industry

3 Inteco Organization Chart INTECO Group Bruck / Mur TECTRADE Handelgesellschaft Bruck / Mur INTECO special melting technologies Bruck / Mur ART advanced refractory technologies Bruck / Mur TBR casting technologies Leoben INTECO vacuum technologies Tönisvorst, D INTECO metallurgical equipment Dalian, CN PTI process technology int. Tucker, USA RCT recycling crushing technologies Bruck/Mur, A Norberg Steel and engineering Västerfärnebo, S S INTECO atec automation Laßnitzhöhe, AA DONAU carbon technologies Guanzate, I INTECO India Ltd. New Delhi, IN

4 Inteco PTI Founded in 1993 Headquarters located in Tucker, Georgia, USA 40 highly qualified employees Offices PTI China (Shanghai) PTI South America (Sao Paolo) PTI Europe (Czech Republic) Since 2013 PTI is a member of the INTECO Group

5 Situation Traditional slag door design: Simple Functional Protects frame Traditional Traditional slag door operation: Traditional cold spot Tunnel traps scrap

6 Situation Issues with a tunnel: Delay in sample taking Increased power on time Must clear tunnel area Operator safety

7 PTI s SwingDoor TM SYSTEM

8 Design Hydraulic actuated Angle adjustable Water cooled Copper door panel Door burner Mounted on upper shell

9 Pictures

10 Operation

11 Safety Improved operator safety Scrap pushing is eliminated Slag door area has not to be cleaned during the melting cycle Yield kwh Exhaust system Return scrap Injection carbon Charge carbon

12 : Safety Main purpose of the SwingDoor is to increase operator safety Need for operator to approach the EAF during flat bath was eliminated.

13 : Yield Retention of slag in the EAF increases yield Iron is reduced back to the liquid bath while still residing in the EAF

14 : kwh Reduction Elimination of cold spot and increased slag coverage of electrodes resulted in kwh reduction

15 : kwh Reduction

16 : Exhaust System Closed door operation required reduction in 4 th whole draw Additional canopy draw resulted in improved air quality and reduced housecleaning

17 : Return Scrap B scrap production is reduced/eliminated - Cost of processing return scrap is eliminated - Cost of melting return scrap is eliminated Free floating iron is reduced from the slag

18 : Injection Carbon Closed door operation requires exact control of the carbon injection Foamy slag height has increased

19 : Charge Carbon Reduce or Eliminate Charge Carbon SwingDoor eliminates air ingress and allows carbon to dissolve into the liquid steel

20 Summary/References - Improve safety - Reduce charge carbon - Reduce injection carbon - Reduce return scrap - Improve yield - Improve exhaust system - Fork truck maintenance - Other process improvements Electrodes Power off time Summary

21 Summary/References Thank you for your attention! Summary