Abstract
At blast furnace B at Salzgitter Flachstahl a series of innovative measuring techniques are installed to monitor the processes at the blast furnace top, making this furnace one of the best equipped furnaces in Europe. These techniques comprise full 2D measurement of the temperature profile of the top gas shortly above the burden surface, 3D radar scan of the whole burden surface and online measurement of the dust concentration in the top gas. After more than 5 years’ experience with most of these techniques, they enable to better understand the complex chemical and physical interrelations occurring in the BF stack between the ascending process gas and the descending solid burden. A couple of examples of incidents that were monitored are presented in this article, including influences of charging programmes on top gas temperature profiles and influences of disturbed gas solids interaction on the BF working state. The new measuring techniques with tailor-made data processing enable the operators to gain a better picture of the processes currently occurring in the blast furnace, consequently supporting them in keeping the blast furnace operation as stable and efficient as possible.
Highlights
Blast furnace Ironmaking has a history of centuries in Europe
Furnace description Blast furnace (BF) B is one of two medium sized BFs and one smaller BF operated at Salzgitter Flachstahl
Starting in 2016 with the European StackMonitor project, SZFG uses the availability of the described innovative measuring techniques to systematically monitor the BF working state and to examine the interrelation between the different measured physical quantities
Summary
Blast furnace Ironmaking has a history of centuries in Europe. During this period, the Blast furnace has matured and improved – a process which is still ongoing. No bigger changes of raw materials or the operational set point were carried out, the descend of material in the furnace might instantly start to get disturbed, which is known amongst operators as “hanging and slipping”. This describes a situation where the material descend firstly, starts to slow down, and instantly slips down. The homogeneous process gas counter flow through the burden column is disturbed and local flow channels with high gas velocities build up. Deviations from the typical top gas temperature profiles can be regarded as signs of bad working blast furnace stack processes
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
