EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

Traditional approaches to blast furnace gas cleaning using wet scrubbers are being challenged by the re-emergence of dry gas cleaning technologies based on the success of the same in other parts of the iron and steel network. The wet gas cleaning of blast furnace gases offers a proven solution to the handling of the process gases removing dust and certain trace contents in the gas in a...

During the steel making process, huge quantities of gas are produced, stored and used as fuel later on in the process. It is the case of the Coke Oven Gas (COG), the Blast Furnace Gas (BFG), the Basic Oxygen Furnace Gas (BOFG) and the Corex Gas. Those gases contains high percentages of Carbon Monoxide (CO), which is very toxic at low concentrations and also odorless and colorless, which makes...

In the past decades, the requirements in respect of environmental protection and the regulations by the environmental protection authorities, respectively have become ever stricter worldwide. And the possibilities to prove and measure harmful substances have been improved significantly. Moreover, the harmful effects on health of many substances have been evaluated and detected only in the...

The installation of a spark arrester prior to the EAF’s off-gas filter has become common practice for prolonging filtering bag lifetime as carbon injection was increased. The Axial Cyclone efficiency has been optimized by sophisticated CFD programs in recent projects to achieve sufficient abatements starting from 125 microns whilst simultaneously maintaining pressure drops to below 1"...

The steel production via the EAF route produces free lime containing dust. In the case of carbon steel production, the main dust recycling process is the Waelz furnace, allowing the recovery of zinc but not of Fe. In the case of stainless steel production, the recovery of valuable alloying elements (a.o. nickel, chromium, and molybdenum) can be achieved by recycling the dust in the form of...