In addition to the side wall lances and the manipulator, the pneumatic injection of bulk materials into the electric arc furnace can also be carried out via the roof of the electric arc furnace. The injection process is carried out by means of water-cooled injection nozzles, which are aligned in the delta or the hot spots of the furnace, depending on the desired application.
With the proven STEIN injection technology, up to four injection points can be operated with one system. For the injection through the furnace roof, two applications have proven themselves:
Injection of lime as a slag forming agent
- Direct injection of lime into the delta of the electric arc furnace
Injection of dolomite lime as a hot spot protection
- Direct injection of dolomite lime into the Hot-Spots of the electric arc furnace
Advantages:
- Faster slag reaction and simultaneous Fe-reduction of the slag
- Savings in lime consumption and energy in comparison to usual addition-methods
- Saving time by injection of lime already during the melting process
- Injection rate up to 450 kg/min possible
- Improved logistics (Transport and injection of lime via pipelines = self-enclosed system)
- Complex and maintenance heavy conveying belts with resulting dust emissions are obsolete.
Our injection systems offer the following advantages:
- Anti-clogging system.
- One system can supply up to four injection points
- Dosed charging of the bulk material into the furnace
- Integrated regulating and control valves for feed media and bulk material
- Low operating and maintenance costs
- Precise dosing of the bulk material to be injected
- Complete automation possible through stand-alone control or integration into the furnace control system
For more detailed information for the Injection via Roof system, please click HERE or contact Scancorp Limited.
STEIN designs efficient and cost-optimized conveying-, dosing- and injection-systems, develops new technologies and provides customers with professional services worldwide.
The pneumatic transport, the dosing and the injection-technology of bulk material (Carbon, Lime, Polymer, etc) present their core competence - starting with consulting and design through the manufacturing, erection, and start-up.
Due to their know-how, which is steadily enhanced by technical and patented innovations, STEIN has established an outstanding international reputation, especially with steel mills and foundries. Hundreds of conveying-, dosing- and injection-systems on all continents establish this reputation.