Posted on 09 Jun 2014
Most Modern Blast Furnace (BF) and Converter (BOF) Gas Cleaning – a Report of the State-of-the-Art Technology
Since almost 15 years Paul Wurth Umwelttechnik GmbH in Essen/Germany is dedicated to BF and BOF gas cleaning. The technology developed, applied, and improved over the years is the so-called annular gap scrubbing technology. This wet gas cleaning technology in combination with our patented axial cyclone development (dry gas cleaning stage) represents a very efficient gas cleaning concept. The axial cyclone is removing up to 85 % of the dust in the BF gas. Compared to a standard dust-catcher, which is still the main dry dust separation stage in the chain of BF gas cleaning, it is a significant increase in dust separation and leads to a minimized amount of dust separated in the wet stage. Less water consumption, higher energy output with a BF top gas expansion turbine (TRT) operation, and less valuable BF dust which has to be dumped are the logic consequences of this gas cleaning arrangement. The annular gap scrubbing technology is also adapted to BOF gas cleaning. The application of this technology results in sustainable cost savings and reduces significantly the environmental impact. The dry dust can be recycled via the sinter plant. The zinc fraction of the blast furnace gas which shall not be recycled to the blast furnace will be removed in the annular gap scrubber.2012 SEAISI Seminar
