ProgramMaster Logo
Conference Tools for 2021 TMS Annual Meeting & Exhibition
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Materials Processing Fundamentals
Presentation Title Carbothermal Reduction of Brazilian Linz Donawitz-LD Steel Sludges
Author(s) Mery Cecilia Gomez-Marroquin, Jose Carlos D´Abreu, Enrique R. Dionisio-Calderón, Nilton Cárdenas-Falcón, Abraham J. Terrones - Ramirez, Jhony F. Huarcaya-Nina, Kim J. Phatti - Satto, Fernando Huaman-Perez
On-Site Speaker (Planned) Mery Cecilia Gomez-Marroquin
Abstract Scope Carbothermic reduction was conducted using coarse (Sample A) and fine (Sample B) Brazilian Linz Donawitz-LD steel sludges and a sample of Peruvian anthracitic metallurgical coke (AMC) at 82.5% of fixed carbon. Specimens of 1g of sample A and sample B preliminarily mixed with AMC at Fe/C:1/2 were weighted. Sample A / AMC and Sample B / AMC, reduction time and reduction temperature were identified as factors or independent variables. Conversions (α) or % Reduction were selected as dependent variables. The values of weight ratios for Sample A / AMC and Sample B / AMC (3/7 and 7/3, respectively), reduction temperatures of 600 and 900°C and reduction times lapses of 30 and 60 minutes, corresponding to their minimum as well as their maximum level of fluctuation respectively, were carry out via two design of experiments based in the factorial method 23; one for each sample (A and B); using a Brazilian statistics software called COLMEIA - Snedecor algorithm F in order to evaluate the effects simple, double and multiple of factors over the conversions (α) or % Reduction. Carbothermic reduction tests were performed at the optimal weight ratio (sample A /AMC: 3/7 and sample B /AMC: 3/7), reduction temperatures: 600, 700, 800 and 900° C and reduction times: 20, 30, 40, 50 and 60 minutes in order to estimate k- specific reaction rate constant, Ea-apparent activation energy and the A-Arrhenius pre-exponential frequency factor. The kinetic models that better fitted to the conversions (α) of both samples (A and B) were: Boundary Chemical Reaction Model for spherical symmetry (BCRM-ss): 1-(1-α)^(1⁄3)=kt and the model of simple exponential continuous reaction (MSECR): -ln(1-α)=kt. The kinetic parameters obtained were: (1) Sample A: Ea = 7. 45 - 8.08 kJ / mol and A = 0.009 - 0.032 Hz for a linear correlation between 0.8241 and 0.8276 and (2) Sample B: Ea = 19.36 - 21.94 kJ / mol and A = 0.05 - 0.21 Hz for a linear correlation between 0.9758 and 0.9777.
Proceedings Inclusion? Planned:


Carbothermal Reduction of Brazilian Linz Donawitz-LD Steel Sludges
Computational Fluid Dynamics Modeling of Damped Oscillations of Molten Metal Droplets
Contactless Inductive Flow Tomography for Control of Liquid Metal Flow with Electromagnetic Actuators
Containerless Materials Processing for Materials Science on Earth and in Space
Cylindrical and Planar Magnetron Sputtering for Microstructural Control
Effect of Dissolution of Titanium Ions on Ti Alloys Electrodeposition from EMIC-AlCl3 Ionic Liquid at Low Temperature
Effect of Nitrogen on Weldability and the Microstructure in Laser Beam Welding of Duplex Stainless Steel
Effect of Slag Conductivity on Decarburisation Reaction Kinetics
Experimental Characterization of Liquid Metal Bubble-driven Flows Modeling the Situation in a Steel Ladle
Influence of Slab Transportation and Handling Practice on Crack Sensitivity of Micro-alloyed Steels
Liquid-liquid Extraction Thermodynamic Parameter Estimator (LLEPE) for Multicomponent Separation Systems
Low Temperature Aluminothermic Reduction of Metal Oxides
Modelling of Metal Loss in Ferromanganese Furnace Tapping Operations
Numerical Simulation of the Influence of Particle Physical Properties on Flow Field during the Aeration Leaching Process
Stress Development Simulation in Continuously Cast Steel Slabs during Cooling Process
The Role of Copper in Combustion Processes
Thermodynamic Examination of Quaternary Compounds in the Ag–Fe–(Ge, Sn)–Se Systems by the Solid-state EMF Method
Thermodynamic Modeling of Iron-copper-sulfuric Acid Solutions during Solvent Extraction and Electrowinning for Copper Production
X-ray and Neutron Radiographic Experiments on Particle-laden Molten Metal Flows

Questions about ProgramMaster? Contact