12th International Symposium on High Temperature Metallurgical Processing: Preparation of Alloys and Materials/Process Optimization
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, King Fahd University Of Petroleum And Minerals
Wednesday 2:00 PM
March 2, 2022
Room: 213A
Location: Anaheim Convention Center
Session Chair: Onuralp Yücel, Istanbul Technical University; Ender Keskinkilic, Atilim University
2:00 PM Introductory Comments
2:05 PM
Evaluation of Aluminum White Dross: Ilayda Öner1; Buse Polat1; Selçuk Kan1; Kagan Benzesik1; Onuralp Yücel1; 1Istanbul Technical University
Secondary aluminum production generates harmful by-products like dross. In this study, the aim is producing fused calcium-aluminate from non-metallic residue(NMR) of aluminum white dross(AWD) to use as synthetic flux. Therefore, three sets of experiments were done. In first set, calcination experiments were conducted to obtain high purity alumina. Effects of temperature and duration were investigated at different temperatures for up to 2 hours in a rotary furnace. It was determined that at 1150 °C and 2 hours of duration 5.21wt.%N was eliminated and alumina purity reached 94.67wt.%. In the second set, the aim was to obtain calcium aluminate phase by calcination of dross and limestone while investigating particle size effect of limestone. Consequently, Ca12Al14O33 and Ca3Al10O18 phases were obtained with crushed limestone. At last, obtained calcium aluminates were fused at different temperatures for an hour in graphite crucibles to increase added-value the product. The liquid phase was observed at 1550°C.
2:25 PM
Investigation of Microstructure and Mechanical Properties of Ferritic Stainless Steels Joined by Laser Welding: Gunseli Guc1; Onuralp Yücel2; 1Istanbul Technical University/Arçelik; 2Istanbul Technical University
Laser welding widely used in the joining of materials due to the advantages provides. In this study, the aim is to investigate the suitability of different ferritic stainless steels for laser welding method. Within the scope, welding of 0.5 mm thickness of ferritic stainless steel sheets of different grades (430, 430Ti and 441) was performed by solid state disk laser and welding parameters were determined as 1300 Watt power, 6 m/min speed welding in continuous wave mode. As a shielding gas, argon was used. Metallographic examinations, SEM-EDS analysis, microhardness measurement, tensile, cupping and bending tests were carried out with welded and unwelded samples. Thus, the structure and property relationships of ferritic stainless steels joined by laser welding were examined and compared. As a result, adequate welding quality could not be achieved in 430 samples and it was observed that the welding ability was insufficient compared to 430Ti and 441 samples.
2:45 PM
Pelletizing of Iron Ore with High Iron Grade and Low Silicon Content: Yan Zhang1; 1Shougang Group
In this paper, an iron ore with high iron grade and low silicon content was used in pelletizing experiments. Specific surface areas were tested and it would increase slowly and then have a rapid increase with the increasing of particle sizes. 30% of the high iron grade ore could be used to replace another iron ore which the silicon content was much higher. SiO2 content of firing pellets would decline 20.38% while 30% of the high iron grade ore was added.
3:05 PM
NOW ON-DEMAND ONLY - Optimization of Allihn Condensers for Distillation of Ethanol: Sarah Gandu1; Clement Gonah1; Adele Garkida1; 1Ahmadu Bello University
The effect of the number of bulbs on the contact time for distillation of ethanol was studied. Ten type “As” (A1 to A10) and type “Bs” (B1 to B10) Allihn condensers were designed consisting of inner tube θ9/556mm, outer tube θ40/600mm, outlets and inlets θ9/1.5mm and bulbs θ26/50mm. Time for first drop, yield, boiling point and density of the distillate were the parameters considered. 750ml of ethanol was distilled for 1hr. Results showed an average yield of 412.70ml for types “As” Allihn condensers and 391.80ml for type “Bs” Allihn condensers. Type A4 (492ml) gave the highest yield but took the longest time to start distilling. These results showed that type “As” Allihn condensers are more efficient at distilling than type “Bs”. Type “As” Allihn condensers are therefore suitable for distillation of ethanol.