The SIP process, which is now being used at the Duisburg blast furnace "Schwelgern 1", is focused on a "deep action" of the oxygen. For technical implementation, an additional lance through which the oxygen is injected is inserted into each of the 40 tuyeres of blast furnace 1. Each of the 40 lances is also supplied by its own injection unit, the so-called SIP box. Additional oxygen is subsequently brought into the furnace by means of pulses, which react deeper in the furnace. This improves the gas and liquid flows of the blast furnace and increases efficiency.
"The SIP process is an in-house development and our furnace is the first in the world to go into operation. The carbon-based metallurgy of the blast furnace route will perspectively give way to hydrogen-based technologies. Innovations such as the SIP process allow the necessary efficiency improvements and CO₂ savings in the existing infrastructure until the technology change is fully implemented," explains Dr. Rainer Klock, Manager Furnace Metallurgy of the Schwelgern blast furnace operation.
Thyssenkrupp expects to reduce costs and also CO₂ emissions. "By optimising the consumption of the reducing agents coke and coal dust, we will probably save millions of euros in costs at Schwelgern 1 alone – and this is just the beginning," says Jörg Glebe, Managing Director of Thyssenkrupp AT.PRO tec GmbH. "In the long term we want to bring the technology to market worldwide and are already in talks with major plant engineering companies.”
Lead partners in the development of the technology, which is unique worldwide, were Thyssenkrupp AT.PRO tec GmbH, a company of Thyssenkrupp Materials Services, and Thyssenkrupp Steel Europe.
_{(Source: Thyssenkrupp Steel Europe)}