EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

DK Recycling & Roheisen operates its blast furnace No. 3 with zinc loads higher than any other blast furnace in the world, because the metallic feed consists of iron and zinc containing residues of the steel industry. During the last year, the phenomena of the furnace lifting itself more than 200 mm out of its foundation could be observed. This led to dramatic consequences in operation and had to be solved by a complete reline of the hearth as well as the foundation. The paper describes the reasons for the furnace lifting as well as a detailed description of the new hearth concept and the execution of the work in summer 2016.