12th International Symposium on High Temperature Metallurgical Processing: Energy Efficient Clean Metallurgical Technologies
Sponsored by: TMS Extraction and Processing Division, TMS: Pyrometallurgy Committee
Program Organizers: Zhiwei Peng, Central South University; Jiann-Yang Hwang, Michigan Technological University; Jesse White, Kanthal AB; Jerome Downey, Montana Technological University; Dean Gregurek, RHI Magnesita; Baojun Zhao, Jiangxi University of Science and Technology; Onuralp Yucel, Istanbul Technical University; Ender Keskinkilic, Atilim University; Tao Jiang, Central South University; Morsi Mahmoud, Abdullah Al Salem University (AASU)
Monday 2:00 PM
February 28, 2022
Room: 213A
Location: Anaheim Convention Center
Session Chair: Onuralp Yücel, Istanbul Technical University
2:00 PM Introductory Comments
2:05 PM
Recent Studies on Hot Metal Desulfurization: Ender Keskinkilic1; 1Atilim University
Hot metal desulfurization station is an indispensable part of a modern integrated iron and steelmaking company. In this plant, roughly speaking, at least ninety percent of sulfur in hot metal is eliminated before basic oxygen steelmaking. In the conventional process, stable sulfide making additives of various kinds and forms are introduced to the hot metal present in torpedo cars or more commonly in ladles. Together with desulfurization reactions, a slag rich in sulfides is collected at the top and it is then skimmed out. Other than hot metal treatment stage, further removal of sulfur may be accomplished in secondary steelmaking, depending primarily on suitability of metallurgical conditions in that specific vessel. In this literature work, recent experimental studies related to hot metal desulfurization are reviewed. More emphasis shall be on the works performed after the millennium and specifically in the last decade, including the ones offering new and novel methods.
2:25 PM
Evaporation of Antimony Trioxide from Antimony Slag by Nitrogen Injection in a Top Submerged Lance Smelting Set-up: Hongbin Ling1; Annelies Malfliet1; Bart Blanpain1; Muxing Guo1; 1KU Leuven
In this work, we studied the evaporation of antimony trioxide (Sb2O3) from an antimony slag by bubbling nitrogen gas in the temperature range 1000-1300 °C. Experiments were carried out at gas flow rates of 20-60 l/h for 70 min. The slag evaporation ratio and Sb recovery were evaluated by a gravimetric method. Increasing temperature and gas flow rate resulted in a higher slag evaporation ratio and Sb recovery. The Sb recovery reached around 69% at 1200 °C with a gas flow rate of 40 l/h. The generated Sb2O3 product consisted of senarmontite and valentinite. With Sb2O3 evaporation, the PbO content in the molten slag gradually increased, resulting in an increase of PbO content in the product. Based on the overall economic benefits, the evaporation process can be optimized to balance the Sb recovery and the purity of the Sb2O3 product.
2:45 PM
Large Eddy Simulation on Slag Entrainment in Slab Continuous Casting Mold under Different Casting Speeds: Yanbin Yin1; Jiongming Zhang1; 1University of Science and Technology Beijing
To investigate the transient multiphase flow and slag entrainment in slab continuous casting mold, a transient multiphase large eddy simulation model was constructed. In the model, the multiphase (steel-slag-air) flow was simulated through VOF method, argon bubbles were tracked using DPM method. Different slag entrainment mechanisms in the mold were found. The effect of casting speed on the transient multiphase flow and slag entrainment in slab continuous casting mold has been revealed. Furthermore, an index was proposed, to evaluate the impacts of slag entrainment under different conditions.