11th International Symposium on High Temperature Metallurgical Processing: 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; 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; Jesse White, Kanthal AB; Morsi Mahmoud, King Fahd University Of Petroleum And Minerals
Wednesday 2:00 PM
February 26, 2020
Room: 12
Location: San Diego Convention Ctr
Session Chair: Baojun Zhao, University of Queensland; Ender Keskinkilic, Atilim University
2:00 PM Introductory Comments
2:15 PM
Parameters Affecting on the Phosphorus Distribution Between Slag and Liquid Metal in BOF: Abdelrhman Hassan1; 1Tabbin Institute for Metallurgical Studies
The phosphorus content of the hot metal is higher than the range and optimal content of hot metal normally used for steel making in LD converters at EISCO. Therefore adequate care is necessary to investigate slag/metal partition of phosphorus. The activity of total ferrous oxide in the slag was estimated according to the model of regular ionic solutions, it was used to find the concentration of oxygen in the metal. The activity coefficient of phosphorus and oxygen in the metal are 1.1195 and 0.8367 respectively.By using the phosphate capacity, phosphorus distribution between slag and metal could be calculated; the effect of temperature on both phosphate capacity and phosphorus distribution ratio is large, while the influence of slag composition is small.
2:35 PM Cancelled
Research on the Database Construction of Furnace Material Consumption in EAF Steelmaking Process: Botao Xue1; Lingzhi Yang1; Yufeng Guo1; Feng Chen1; Fu-qiang Zheng1; Jinlai Zhang1; Hongguo Yao1; Xiaolei Hou1; 1Central South University
As the three-level management system for material consume in the EAF steelmaking plant cannot make statistics and calculation of material consumption for each furnace, the data from the system cannot provide guidance for actual smelting operation. In this paper, the field PLC process smelting data of the material consumption in “EAF-LF-CC” process is collected from Kepware as OPC server and by VS2010 as development tool, which is classified (scrap charging, auxiliary materials, gas consumption, injection information, power supply data, etc.) and stored into Microsoft SQL Server 2008 database to build database of furnace material consume. The database construction provides a guidance for reducing the material consumption and optimizing smelting operation for each furnace.
2:55 PM
Experimental Study on Water Model of Continuous Smelting Reduction Reactor: Haijuan Li1; Yan Liu1; Xiaolong Li1; Ting-an Zhang1; 1Northeastern University
Non-blast furnace ironmaking technology of metallurgical slags with High iron and Low grade iron ore is of great importance and becoming increasingly valued. This paper presents a new type of continuous smelting reduction reaction for non-blast furnace ironmaking technology. Using cold water model experiment basing on principle of similitude establish a new type of reactor. This paper studies the core problem of two-phase separation and investigate the relationship among material factors, operating factors, equipment factors. Finally, according to the analysis of theoretical and experimental data , we can obtain the empirical equation between the oil phase entrainment and each factor, in order to provide a theoretical basis for further thermal experiments and has certain reference value.
3:15 PM Break
3:30 PM
Theoretical Analysis and Experimental Verification of Formation of As-bearing Rare Earth Inclusions in Steel: Bin Bai1; Hongpo Wang1; Silu Jiang1; Lifeng Sun1; Yu Wang1; 1Chongqing University
It is a feasible method to improve the quality of steel products by adding rare earth to change the state of arsenic in steel to avoid its harm. In this study, the As-bearing rare earth inclusions in steel were extracted by non-aqueous electrolysis method, and their types were fully understood. Wagner activity model and non-equilibrium solidification model were used to calculate the formation process of rare earth inclusions in liquid and solidification process. The formation mechanism of single-phase and complex the As-bearing rare earth inclusions was verified by laboratory experiments. The results showed that La2O3 and La2O2S were formed in the liquid phase, then the As-bearing rare earth inclusions La-S-As and La-As began to form during the solidification process of steel liquid. The composite inclusions of La-O-S-As with distinct stratification were further precipitated.
3:50 PM
Precipitation Behavior of B2O3 Addition on CaO-Al2O3-Sc2O3 Slag System Through In-situ Observation: Fei Wang1; Wenke Zhi1; Ling Zhang2; Zhuangzhuang Liu2; Bin Yang1; Muxing Guo2; 1Kunming University of Science and Technology; 2KU Leuven
This study focuses on the recycling of scandium from high-temperature processing metallurgical slags through pyrometallurgical routes. For the optimization of the recycling route, the distribution of scandium in CaO-Al2O3-Sc2O3 slag system and the precipitation behavior during cooling are of significance. The precipitation and solidification behaviors were recorded by a confocal scanning laser microscope (CSLM) combined with an infrared imaging furnace heating (IIF). The compositions and microstructures of the equilibrated phases of this systems were determined by EPMA/WDS. It is observed that there is remarkable influence of B2O3 addition on the precipitation and solidification behaviors in the CaO-Al2O3-Sc2O3 system. The construction of CCT diagram can be employed to guide the rare earth recovery in industrial practice.