Material Handling, Packaging & Transportation
Hot metal cranes are the most safely designed cranes in the steel industry, but have had incidents of dropping hot metal ladles. This event should be a red flag that something must be done in the industry to prevent such events. This paper will attempt such a solution.
Historically, studies have been performed on enclosed crane cabs regarding the safety of the operator, including fire safety, ergonomics, cab location, access to crane, fall protection and lighting. One area where there has been little to no research is air quality within the crane cab and what that means for the crane operator. This study was performed on a ladle crane cab in an electric arc furnace steel mill, evaluating the airborne hazards within the crane cab. This paper discusses the results.
An airspace system calculates volume of the scrap yard in real time and automatically manages the charging of the basket from recipes, allowing the optimization of trajectories, work times and the orders according to production. The user-friendly interface simplifies the activity of the operator, who is then needed only in a supervision and console control position.
To meet current and future environmental regulations, existing Venturi scrubbers can be revamped. To validate the achieved performance, a laboratory test rig has been constructed. Strategies to improve the performance of existing Venturi scrubbers have been developed
To further reduce process times and increase availability of the LD converters at voestalpine Stahl GmbH, the old hydraulic sublance manipulators were replaced with three new robotic sublance systems by Primetals Technologies Austria GmbH. The old manipulator was dismantled and the new robot solution installed during a five-day converter relining. Performance was excellent in the first days, and an availability of 95% was achieved in the start-up period.
This work examines the transition between internal and external oxidation under conditions that would be encountered during continuous annealing of steels. Depending on alloy chemistry and exposure conditions, surface oxides can form, which lead to problems with galvanized coating adherence. The influence of dewpoint temperature, annealing temperature, and alloy concentration on oxide evolution was examined, and results were compared to existing theoretical models.
Thermal measurements on round and polygonal-shaped ingots weighing between 5.7 and 10.3 metric tons are reported. During a particular trial, operating conditions were noted, and mold surface temperature as well as conduction heat were continuously monitored. Ingot surface temperature on stripping was also recorded. On the basis of such, realistic estimates of teeming rates, differential mold powder behavior and thermal contact resistances were deduced.