The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Krzysztof Gargul - One of the best experts on this subject based on the ideXlab platform.
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Leaching of Lead and Copper by Citric Acid from Direct-to-Blister Copper Flash Smelting Slag
2018Co-Authors: Krzysztof Gargul, Piotr Jarosz, Stanisław MałeckiAbstract:Direct-to-blister copper flash smelting slag contains up to 14% of copper and 2-4% of lead. Considering this fact, this material is subjected to the high-temperature reduction Process. After this, Converting Process is performed on the Cu-Pb-Fe alloy being the product of decopperization Process in electric furnace. An alternative to the presently used Processing of flash smelting slag would be its hydrometallurgical treatment and selective recovery of Pb and Cu. This paper presents the results of laboratory tests on flash smelting slag leaching with citric acid solutions. The experiments performed allowed to determine the Process parameters at which the Pb concentration in the post-leaching sediment reached the value of 0.41-0.6% while the Pb content in flash smelting slag was 3.05%. Analogous values for copper were 11.5-11.8% (after leaching) and 12.44% (before). Material after leaching in citric acid solutions can be Processed, in the second step, using sulfuric acid solutions, and it could lead to the recovery of almost all copper contained in it.
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hydrometallurgical recovery of lead from direct to blister copper flash smelting slag
Archives of Civil and Mechanical Engineering, 2017Co-Authors: Krzysztof Gargul, B Boryczko, Andzelika BukowskaAbstract:Abstract Furnace slag from direct-to-blister smelting of copper concentrates contains 12–15% of copper and 2.5–4% of lead. In this form it cannot be deemed as waste material, and thus it is subjected to a high-temperature Process of slag decopperization; after this, Converting Process is performed on the Cu–Pb–Fe alloy being the product of decopperization Process in electric furnace. An interesting alternative to the presently used Processing of flash smelting slag would be its hydrometallurgical Processing and selective recovery of Pb and Cu. This paper presents the results of laboratory tests on flash smelting slag leaching with acetic acid solutions and acetic acid with urea additive. The experiments performed allowed to optimize the Process parameters to such an extent that Pb content in the post-leaching sediment is practically equal to the value obtained through the high-temperature Process performed in electric furnace.
Bo Björkman - One of the best experts on this subject based on the ideXlab platform.
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Dust forming mechanisms in the gas cleaning system after the copper Converting Process : (II). Thermodynamic studies
Scandinavian Journal of Metallurgy, 2016Co-Authors: Caisa Samuelsson, Bo BjörkmanAbstract:Thermodynamic calculations were used to study the dust-forming mechanisms during the copper Converting Process and to study the possibilities for achieving a controlled dust generation through selective condensation. The evaporation of Zn, Pb, Bi, As and Sb from the melt during the copper converter Process and their condensation at decreasing temperatures was simulated. Comparison with experimental data from the full-scale Process shows a good qualitative agreement. It was therefore considered possible to use the thermodynamic model to predict the generation of chemical dust in the gas cleaning system at various temperatures and varying amounts of leakage air. A selective condensation of Pb, Zn and As at various temperatures could, according to thermodynamic calculations, be possible at high temperatures. A selective condensation of metals requires a closed gas cleaning system or a gas cleaning system with a limited amount of leakage air in order to maintain the desired temperature level.
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Dust forming mechanisms in the gas cleaning system after the copper Converting Process : (I). Sampling and characterisation
Scandinavian Journal of Metallurgy, 2016Co-Authors: Caisa Samuelsson, Bo BjörkmanAbstract:Recovery of metals in special Processes from dust with a low content of each metal can generally not be accomplished with any economic gain. A controlled dust generation whereby the dust would be enriched with specific metals would facilitate the possibilities of recovering metals from such dusts. The aim of this work was to study dust formation in the gas cleaning system after the copper Converting Process and to examine the possibilities for a selective dust collection. Dust samples from different positions in the gas cleaning system were characterised. Vaporised metals, e.g., compounds of Pb, Zn, As and Bi, have condensed in the converter hood, depending on temperature drop of the gas to less than 700°C, forming the so-called chemical dust. The chemically-formed dust has a smaller particle size than the mechanically transported particles, matte, slag and SiO 2 , and will therefore to a large extent be transported a longer distance in the gas cleaning system.
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Dust forming mechanisms in the copper Converting Process
1996Co-Authors: Bo Björkman, Caisa SamuelssonAbstract:A controlled dust generation whereby the dust generated would be enriched with specific metals would considerably facilitate the possibilities of recovering metals from such dusts. A basic understa ...
Baojun Zhao - One of the best experts on this subject based on the ideXlab platform.
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Phase Equilibria of Ferrous-Calcium Silicate Slags in the Liquid/Spinel/White Metal/Gas System for the Copper Converting Process
Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science, 2020Co-Authors: Mao Chen, Leonel Contreras, Baojun ZhaoAbstract:Ferrous calcium silicate (FCS) slags are reported to have high potential for use in the copper Converting Process. However, no phase equilibrium study has been carried out under a simulated Converting gas atmosphere in the presence of SO2. In this study, under accurately controlled P(SO2) 0.4 atm and P(O2) 10−6 atm, the phase equilibria of FCS slags in a liquid/spinel/white metal/gas system were investigated for the copper Converting Process. The liquidus temperatures of slags in the Fe-Ca-Cu-Si-S-O system were quantified as well as the solid solubilities of Cu2O in the spinel phase. The experimental results were compared with the FactSage predictions, which provided clues for further improvement of the thermodynamic modelling. The applications of the FCS slags were further discussed and compared with iron silicate slags. The results obtained will contribute to slag development for Converting operations and thermodynamic calculations.
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7th International Symposium on High-Temperature Metallurgical Processing: TMS/7th - 8th International Symposium on High-Temperature Metallurgical Processing
The Minerals Metals & Materials Series, 2020Co-Authors: Jiann-yang Hwang, R F F Gerardo Alvear, Onuralp Yücel, Dean Gregurek, Baojun Zhao, P. Chris Pistorius, Tao Jiang, Varadarajan SeshadriAbstract:Part 1. Energy-efficient and Clean Metallurgical Technology -- Simplified Process for Making Anode Copper -- Techno-economic Analysis of Energy Recovery from Plastic Waste -- Development of Continuous Blast Furnace Slag Solidification Process for Coarse Aggregates -- An Innovative Oxygen-enriched Flash Smelting Technology for Lead Smelting and its Industrial Application -- Characteristics and Control Technology of Fine Particulate Matter (PM) of Iron Ore Sintering -- Sintering Bed Spraying Steam to Reduce NOx and Dioxin Emissions in Shougang -- Part 2. Simulation and Modeling of High Temperature Metallurgical Process -- Neural Prediction Model for Extraction of Germanium from Zinc Oxide Dust by Microwave Alkaline Roasting-Water Leaching -- Simulation of Velocity Field of Molten Steel in Electric Arc Furnace Steelmaking -- Thermodynamic Modelling of Magnesium, Calcium and Strontium-oxides Reduction Systems in Vacuum -- Metallization and Carburization Kinetics in DR Shaft Furnaces. The Metcarb Model -- CFD Modeling of Flow and Chemical Reactions in a Submerged Lance Copper Smelting Furnace -- Numerical Simulation of Ultrasound-Induced Cavitation Bubbling in a Calcium Ferrite Melt -- Part 3. Alloys and Materials Preparation -- Synthesis of Nanocrystalline Carbide Ceramics via Reduction of Anion-loaded Activated Carbon Precursors -- Production of Lithium-Ion Cathode Material for Automotive Batteries Using Melting Casting Process -- Part 4. Fundamental Research on High Temperature Metallurgical Processing -- Degradation Mechanisms of Refractories in a Bottom Blown Copper Smelting Furnace -- Reaction Routes of CaO-Fe2O3-TiO2 and Calcium Ferrite-TiO2 System in Continuous Heating Process -- Thermodynamic Calculations on Electric Furnace Smelting Separation of Chromium-bearing Vanadium Titanium Magnetite -- Preparation for High Activity Lime and its Effect on Desulfurization of Hot Metal Pretreatment -- Part 5. Extraction and Recovery of Metals -- An Industry Overlook of Secondary Lead Pyrometallurgical Processing -- Recovery of Aluminium and its Compounds with Hydro and Pyrometalurgical Methods from Non-metallic Residue -- Purification of Molten Zinc Chloride-Alkali Chloride by Cementation Reaction -- Thermodynamic Analysis of Smelting of Spent Catalysts for Recovery of Platinum Group Metals -- Preparation of Titanium Foams through Direct Electrolysis of the Sintered CaO-TiO2 in Molten Salt CaCl2 -- Experimental Study on Oxidative Desulfurization and Selective Reduction of Molten Copper Slag -- Recycling SiO2 and Al2O3 from the Metallurgical Slag of Nickel Laterite Ores in Molten Sodium Hydroxides -- Remove Sulfur in Copper Dross from Refining Lead by Converting Process -- Part 6. Treatment and Recycling of Metallurgical Slag/Solid Wastes -- Recovery of Fe-Cu Alloys from Copper Slags -- Physiochemical Properties of High Alumina Blast Furnace Slag -- Effect of Cooling Rate on the Acidolysis of Titania Slag -- Structural Analysis of Ge-containing Ferrous Calcium Silicate Magnesia Slag for Applications of Black Copper Smelting -- Selective Recovery of P and Mn from Steelmaking Slag by Carbothermic Reduction -- The Use of Zirconia-based Solid Electrolytes Oxygen Sensor in High Titanium Slag -- In-situ Observation of the Precipitation Behavior of Dy2O3 Containing Slag System -- Recovery of Zn and Mn from Spent Alkaline Batteries -- Part 7. Ironmaking, Steelmaking and Casting -- Optimization of Exothermic Riser Sleeve Design Parameters -- Assessment of Gas-Slag-Metal Interaction during a Converter Steelmaking Process -- On the Role of Nb on the Texture and Mechanical Properties of a Novel As-rolled Medium Carbon Wear Resistant Slurry Pipeline Steel -- A Statistical Analysis of Process Abnormalities in Slab Casting -- Effect of Density Difference on Particle Segregation Behaviors at Bell-less Top Blast Furnace with Parallel-type Hopper -- The Effect of Austenitizing Temperature on Hardenability, Precipitation and Mechanical Properties of Boron Bearing Cr-Mo Alloy Steel -- Part 8. Agglomeration and Direct Reduction of Complex Iron Ores -- Study on Direct Reduction Melting Separation-leaching Process of Disposal Rare Earth Composite Iron Ore -- Reduction Behavior of Garnierite Using Methane by Roasting-Magnetic Separation Method -- Effect of Calculation Method of CaO Addition on Liquid Phase Fluidity -- Effect of Carbon Coating on Magnetite Reduction -- Optimization Method for Iron Ore Blending Based on the Sintering Basic Characteristics of Blended Ore -- Study on Direct Reduction of Low-grade Iron Ore-coal Mini-pellets in Coal-based Rotary Kiln -- Part 9. Poster Session I -- Controlled Synthesis of TiC Nanoparticles Using Solid Oxide Membrane Technology in Molten CaCl2 -- Effect of Chemical Components of Mould Flux on Dissolution Rate of Al2O3 into Molten Flux for High Manganese High Aluminum Steel -- Effect of Temperature on Oxidation Behavior of Cr-Mo-V Steel with Different Cr Contents for High-speed Train Brake Discs -- Electrochemical Preparation of Ti5Si3/TiC Composite from Titanium-rich Slag in Molten CaCl2 -- Evolution of Al-Ti-Mg-O Inclusions during Refining and Casting Process of Interstitial Free Steel -- Experimental Study on Carburization of Higher Vanadium-bearing Hot Metal -- Hematite Precipitation from High Iron Solution in Hydrometallurgy Process -- Influence On The Crystallization Phase Of Mold Flux By Magnetic Fields -- Kinetics Study on Limestone Decomposition in Early Converter Slag -- Mathematical Modeling and Analysis of Converter Slagging and Steelmaking Process by Replacing Part of Lime With Limestone -- Research of Digital Platform and Process Guidance Model in EAF Steelmaking Process -- Research on Factors Affecting and Prediction Model of Silicon Content in Hot Metal of Corex -- Studied on the Cooling Effect of CO2 on the Temperature of Vanadium in Converter -- Study on Grain Size and Porosity of the Produced Lime from Limestone in Early Converter Slag -- Study on Reducing Al2O3 Inclusions by Optimizing Refining Slag -- Study on the Volatilization of Sb2S3 in Vacuum -- The Effects of ZrO2, Y2O3 and Sc2O3 on the Properties of Mould Fluxes for High Manganese High Aluminum Steels -- Thermogravimetric Analysis and Kinetic Study of the Calcification Roasting of Vanadium Slag -- Viscosity of Mould Flux under Electromagnetic Field -- Part 10. Poster Session II -- Analysis of Microwave Drying Behavior of Nickel Laterite -- Analysis of Operational Parameters Affecting Metallization Degree of DRI in Reduction Shaft of COREX Process and Improvement Measures -- Dechlorination of Zinc Oxide Dust by Microwave Rosating with RSM Optimization -- Effect of TiO2 on the Viscous Behavior of High Alumina Blast Furnace Slag -- Fundamental Research on the Iron Nugget Process from Carbon Composite Pellet -- Influence of Coke Quality on Main Technical Indexes of Blast Furnace -- Kinetic Analysis of Blast Furnace Dust Recycling with Flash Reduction Process at High Temperature -- Preparation and Characterization of Iron-coke Briquette -- Preparation of Oxidized pellets with Chrome Ore -- Research and Application of Sintering Surface Steam Spraying Technology for Energy Saving and Quality Improvement -- Research on Bonding Mechanism of Sintering Grate -- Research on Optimizing Sinter Ore Matching Based on the High Temperature Characteristic Numbers -- Research on the Mineral Composition and Microstructure Changes of Iron Ore Sinter during the Gas-Solid Reduction -- Roasting Kinetics of Molybdenite Concentrates -- Study on Influences of Different Ti-bearing Materials on MgO-bearing Pellets Metallurgical Properties -- Supergravity Separation of Pb and Sn from Waste Printed Circuit Boards -- The Effect of Temperature and Additive on Transport and Transformation of P of High-phosphorus Iron Ore during Carbothermic Reduction -- Thermodynamic Calculations on Direct Reduction of Chromium-bearing Vanadium Titanium Magnetite.
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Phase Equilibrium Studies of Iron Silicate Slag in the Liquid/Spinel/White Metal/Gas System for Copper Converting Process
Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science, 2020Co-Authors: Mao Chen, Leonel Contreras, Baojun ZhaoAbstract:The phase equilibria of iron silicate slags in liquid/spinel/white metal/gas system for the copper Converting Process were studied, for the first time, under controlled P(SO2) 0.4 atm and P(O2) 10−6 atm in the spinel primary phase field. The liquidus temperatures of slags in the “FeO”-SiO2-“Cu2O” system were determined, and the solubilities of “Cu2O” in the spinel phase were also quantified. The results would be beneficial for the industrial copper Converting operations, and thermodynamic modeling development.
Stanisław Małecki - One of the best experts on this subject based on the ideXlab platform.
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Leaching of Lead and Copper by Citric Acid from Direct-to-Blister Copper Flash Smelting Slag
2018Co-Authors: Krzysztof Gargul, Piotr Jarosz, Stanisław MałeckiAbstract:Direct-to-blister copper flash smelting slag contains up to 14% of copper and 2-4% of lead. Considering this fact, this material is subjected to the high-temperature reduction Process. After this, Converting Process is performed on the Cu-Pb-Fe alloy being the product of decopperization Process in electric furnace. An alternative to the presently used Processing of flash smelting slag would be its hydrometallurgical treatment and selective recovery of Pb and Cu. This paper presents the results of laboratory tests on flash smelting slag leaching with citric acid solutions. The experiments performed allowed to determine the Process parameters at which the Pb concentration in the post-leaching sediment reached the value of 0.41-0.6% while the Pb content in flash smelting slag was 3.05%. Analogous values for copper were 11.5-11.8% (after leaching) and 12.44% (before). Material after leaching in citric acid solutions can be Processed, in the second step, using sulfuric acid solutions, and it could lead to the recovery of almost all copper contained in it.
Caisa Samuelsson - One of the best experts on this subject based on the ideXlab platform.
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Dust forming mechanisms in the gas cleaning system after the copper Converting Process : (II). Thermodynamic studies
Scandinavian Journal of Metallurgy, 2016Co-Authors: Caisa Samuelsson, Bo BjörkmanAbstract:Thermodynamic calculations were used to study the dust-forming mechanisms during the copper Converting Process and to study the possibilities for achieving a controlled dust generation through selective condensation. The evaporation of Zn, Pb, Bi, As and Sb from the melt during the copper converter Process and their condensation at decreasing temperatures was simulated. Comparison with experimental data from the full-scale Process shows a good qualitative agreement. It was therefore considered possible to use the thermodynamic model to predict the generation of chemical dust in the gas cleaning system at various temperatures and varying amounts of leakage air. A selective condensation of Pb, Zn and As at various temperatures could, according to thermodynamic calculations, be possible at high temperatures. A selective condensation of metals requires a closed gas cleaning system or a gas cleaning system with a limited amount of leakage air in order to maintain the desired temperature level.
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Dust forming mechanisms in the gas cleaning system after the copper Converting Process : (I). Sampling and characterisation
Scandinavian Journal of Metallurgy, 2016Co-Authors: Caisa Samuelsson, Bo BjörkmanAbstract:Recovery of metals in special Processes from dust with a low content of each metal can generally not be accomplished with any economic gain. A controlled dust generation whereby the dust would be enriched with specific metals would facilitate the possibilities of recovering metals from such dusts. The aim of this work was to study dust formation in the gas cleaning system after the copper Converting Process and to examine the possibilities for a selective dust collection. Dust samples from different positions in the gas cleaning system were characterised. Vaporised metals, e.g., compounds of Pb, Zn, As and Bi, have condensed in the converter hood, depending on temperature drop of the gas to less than 700°C, forming the so-called chemical dust. The chemically-formed dust has a smaller particle size than the mechanically transported particles, matte, slag and SiO 2 , and will therefore to a large extent be transported a longer distance in the gas cleaning system.
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Dust forming mechanisms in the copper Converting Process
1996Co-Authors: Bo Björkman, Caisa SamuelssonAbstract:A controlled dust generation whereby the dust generated would be enriched with specific metals would considerably facilitate the possibilities of recovering metals from such dusts. A basic understa ...