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Residence Time Predictions During Fluid-Bed Roasting
By C. A. Natalie
Prediction of average residence times for different particle size intervals during sulfide roasting was investigated. Calculations were done to predict average residence times using a model which empl
Jan 1, 1985
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Smelter Acid in the Broader Market Perspective
By Michael F. Kitto
The production of sulphuric acid at base metals smelters is predominantly an involuntary activity and now comprises approximately 17% of all-forms sulphur supply in world terms. The majority of elemen
Jan 1, 1996
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Mass Spectrometric Study Of The Vaporization Processes And Thermodynamic Properties In The DyF3- Dy2O3 System
By V. L. Stolyarova
The high-temperature Knudsen effusion method was used to study partial pressures of vapour species, activities of components and the Gibbs free energies in the DyF3-Dy2O3 system at the temperature (13
Jan 1, 1997
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Surface Reactions in Low-Temperature Plasma Deposition of Silicon-Oxide Films
By Jun Iwai, Osamu Takai, Yasushi Inoue, Hiroyuki Sugimura
"Infrared reflection absorption measurement was performed during plasma-enhanced chemical vapor deposition of silicon dioxide films at room temperature. Hydrocarbon contaminants adsorbed onto growing
Jan 1, 2000
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Optimization of Ductile Iron Treatment by Computing the Refining Reactions in Liquid Irons
By S. N. Lekakh
Experimental work and thermodynamic simulations of cast iron refining were carried out using various additions of alkali and rare earth metals. The refining reactions for sulfur and oxygen removal wer
Jan 1, 2009
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Oxygen Enhancement of Burners for Improved Productivity
By David J. Krichten
A method of retrofitting air-fuel burners with oxy-fuel capability overcomes the potential problems associated with oxygen combustion in aluminum melting furnaces. The retrofit burner uses the existin
Jan 1, 1997
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Removal Of Heavy Metals From Metallurgical Effluents By The Simultaneous Precipitation And Flotation Of Metal Sulfides Using Column Cells
By Carl C. Nesbitt
A study was conducted to examine the treatment of metal-bearing effluents by precipitating the metals as sulfides and simultaneously collecting the particles by flotation. The precipitant was hydrogen
Jan 1, 1994
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Numerical Simulation of Macro-shrinkage and Micro-shrinkage in A356 Sand Mold Castings
By Laurentiu Nastac
"An advanced casting simulation-based optimization approach was applied in this study to assist in the improvement of the mold design of aerospace components made of A3 56 alloy. By using this approac
Jan 1, 2012
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Pressure Leaching of Enargite in Sulfate-Oxygen Media
By R. Padilla
Enargite (Cu3AsS4) occurs normally associated with copper sulfides, mainly chalcopyrite. When the enargite content in chalcopyrite concentrates is high, direct smelting of the concentrate presents pro
Jan 1, 2008
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Ore Textures that Affect Gold Recovery by Heap Leaching
By William Petruk
"Heap leaching is a developing technology for recovering native gold and electrum from low grade deposits and from tailings. Recovery depends on permeability of the rock and ore minerals, size of part
Jan 1, 1997
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The Physical Chemistry Of The Removal Of Copper From Molten Iron
By Benjamin Vidales
Copper in concentrations above 0.5 weight percent in iron and steel causes hot shortness. This tendency is intensified in the presence of dissolved tin above 0.05 weight percent in the alloy. The unde
Jan 1, 1995
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Determination Of Cavity Profile Induced By Supersonic Jets Impinging Onto Liquids Surface
By Zongshu Zou, Qiang Li, Mingming Li, Mingxia Feng
The impingement onto the surface of bath by top-blown jets is a significant process characteristic in BOF and EAF steelmaking process. The cavity is one of the most important outcomes of the interacti
Jan 1, 2015
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A New Matched Themochemical Diagram for Vacuum Refining of Nickel and Cupronickel Alloys
By Sridhar Seetharuman
Sulfur and oxygen dissolved in nickel and cupronickel melts can be removed as gaseous oxides of sulfur by a vacuum treatment. Presented in this paper is a new matched thermochemical diagram that permi
Jan 1, 1993
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Adhesion Dispersion Of Apolaric Reagents In Flotation Of Hydrophobic Minerals
By Victor Bredykhin
The report is devoted to the investigation and improvement of processes taking place at contact of large quantities of water insoluble liquid and particles of solid phase in a pulp. Theoretical analys
Jan 1, 2006
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Adhesion Improvement of Alumina Scale Formed on Y-Added Fe3Al during High Temperature Oxidation
By I. Kim, J. C. Choi, W. D. Cho
"The effect of yttrium addition on the oxidation behavior of Fe3Al intermetallic compound was investigated in the range of temperature 800 to 1100 °C in 0.2 atm 02 in terms of oxidation rate and oxide
Jan 1, 1998
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Dewatering Of Mine Waste Sludges
By Ronald H. Church
Dewatering of mine waste slurries has been successfully accomplished by the proper use of polymers in flocculating the fine particulate matter suspended in the slurry streams. Conventional treatment o
Jan 1, 1994
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A Direct Reduction Zinc Process
By Lamar S. Todd
The direct production of metal from a sphalerite concentrate is an attractive route for primary zinc. A series of operations and conditions have been selected to efficiently cause the following overal
Jan 1, 1999
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Studies on Bromination Reaction of Heavy Metal Oxides by SbBr3 and TBBPA with Thermal Methods
By Rzyman Michal, Nakamura Takashi, Shibata Etsuro, Grabda Mariusz, Oleszek-Kudlak Sylwia
"Tetrabromobisphenol A (TBBPA) and many systems based on the synergistic effect of brominated organic compounds with Sb2O3 are extensively used as effective brominated flame retardants (BFRs) in many
Jan 1, 2008
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Improvement to the Acid Pressure Leaching of Nickel Laterite Ores
By Walter Curlook
An improved process of hydrometallurgical treatment of laterite ores of the limonitic type for the recovery of nickel and cobalt using sulphuric acid has been developed and patented [I]. The major imp
Jan 1, 2004
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Elemental Solubility Tendency for the Phases of Uranium by Classical Models Used to Predict Alloy Behavior
By Jason M. Porter, Douglas L. Porter, David L. Olson, Travis W. Koenig, Van S. Blackwood, Brajendra Mishra, Robert D. Mariani
"Traditional alloy theory models have been applied relative to the three solid phases of uranium: alpha (orthorhombic), beta (tetragonal), and mainly gamma (body centered cubic)[l]. The Darken-Gurry a
Jan 1, 2012