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Leaching Kinetics of Rare-Earth Elements from Complex Ores by Acidic Solutions
By Eren Hüseyin Obuz
In this study, the leaching kinetics of rare-earth elements were investigated using HCl and HNO3 solutions. A standard crushed complex ore was utilized as raw material. The complex ore (particle size
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Effect Of Mno On Sintering And Microstructure Of Al2O3-Mgo-Cao Refractories
By Mei-le He, Min Chen, Xiang Shen, Lei Xu, Lei Liu, Nan Wang, Xue-liang Yin
In the current study, Al2O3-MgO-CaO refractories were prepared at 1400-1600 by the addition of MnO micro-powders, and the effect of MnO addition on densification behavior of the refractory was discuss
Jan 1, 2016
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Reduction Process of Iron Ores in A Two-Stage Fluidized Bed System
By Yoon-Bong Hahn
A mathematical model has been developed to analyze and predict the reduction process of iron ore particles in a two-stage fluidized bed system. This model includes the effect of particle degradation t
Jan 1, 1996
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The Intragranular Ferrite Plate and the Nucleating inclusions in ,HAZ of X-60 Pipe Steel
By Guo Chang Jiang
In order to improve the IIAZ toughness of X-60 pipe steel, the intragranular ferrite plate (IFP) technology was used. The characteristics of IFP is claimed to be much fine ferrite plates appear inside
Jan 1, 1997
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Process Off-Gas Cooling Design Considerations For Non-Ferrous Metallurgical Processes
By Paykan Safe
This paper reviews various process off-gas cooling options available for sulfide smelting processes. Advantages and disadvantages of each, system are discussed along with the selection criteria for a
Jan 1, 1998
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Model for Bacterial Leaching of Copper Ores Containing a Variety of Sulfides
By H. Y. Sohn, M. K. McCarter, Bradley C. Paul
"A computer model was constructed for bacterial leaching of the major sulfides found in porphyry deposits, including bornite, chalcocite, chalcopyrite, covellite, cubanite, enargite, native copper, py
Jan 1, 1988
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The Behavior Of Arsenopyrite In The Process Of Roasting
By V. A. Luganav
The behavior of arsenopyrite under heating has been studied by many scientists. It has been already established that under heating at more than 650°c and without air access the arsenopyrite dissociate
Jan 1, 2003
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Thermodynamic Evaluation Of Distribution Behaviour Of Arsenic, Antimony And Bismuth In Copper Smelting
By Kimio Itagaki
The distribution behaviours of the VA elements between the gas, slag and matte phases in copper smelting were evaluated on the basis of the thermodynamic data, most of which were determined by the aut
Jan 1, 1983
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Apatite Concentrate, A Potential New Source Of Rare Earth Elements
By Tianming Sun, Gabriella Tranell, Ragnhild E. Aune, Mark William Kennedy
Rare Earth Elements (REEs) are critical for the production of many advanced materials and products. Mining and primary production of REEs are generally associated with significant environmental impact
Jan 1, 2015
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Optimization of Coke Rate and Sinter Quality by Genetic Algorithm for Two-Layer Sintering of Iron Ore
By Niloy K. Nath
Two layer sintering by charging green sinter mix with normal coke rate in the upper layer and reduced coke rate in the lower layer, can substantially reduce the coke rate and also improve the sinter q
Jan 1, 2003
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Solid Solutions on the Co-Ni and Ni-Mg Joins of the Arsenate Members of the Vivianite Group, and their Environmental Significance
By J. L. Jambor
Previous crystal-structure determination of magnesian annabergite (Ni,MgMAsO4)2 8H2O indicated that ordering of Ni and Mg occurs in non-equivalent octahedral sites; such ordering supports the possibil
Jan 1, 1995
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Technical Tools for Increasing the Eco-Efficiency of Textile Products
By Emilia Visileanu, Eftalea Carpus
"Ecological economic policy shall be understood as the sum of political, economical and environmental measurements aimed at the entire economy dematerialization and the dematerialization shall be ""im
Jan 1, 2012
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Flowsheets Development For Recovery Of Non Ferrous Metal Values From Secondary Resources By Solvent Extraction
By T. K. Mukherjee
The importance of the processing of secondary resources such as solid industrial wastes and liquid effuents as well as byroducts for the recovery of the associated metal values hardly needs any elabor
Jan 1, 1996
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Flowsheets Development for Recovery of Nonferrous Metal Values from Secondary Resources by Solvent Extraction
By T. K. Mukherjee, C. K. Gupta
"The importance of the processing of secondary resources such as solid industrial wastes and liquid effluents as well as byroducts for the recovery of the associated metal values hardly needs any elab
Jan 1, 1996
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A 3-D Computer Model of the Flash Converting Furnace Shaft
By H. Y. Sohn, M. Pérez-Tello, P. J. Smith, K. M. Riihilahti
A three-dimensional computer model for the Kennecott-Outokumpu flash converting process for copper matte is presented. The model incorporates the transport of momentum, heat and mass, and reaction kin
Jan 1, 1999
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Mathematical Model of Inclusion Removal during Steel Degassing
By H. Saint-Raymond, F. Gruy, P. Gardin, M. Cournil
"The control of inclusion elimination is getting more and more important to obtain clean steel. This paper presents a methodology under development for predicting cluster growth and elimination in lad
Jan 1, 2001
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Treatment of Produced Water by Electrocoagulation
By Jewel Gomes
Produced water (PW) is salty water trapped in the reservoir rock and brought up along with oil or gas during production. It subsists under high pressures and temperatures, and usually contains hydroca
Jan 1, 2009
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Pollution to Power: A Case Study Of The Kennecott Sulfuric Acid Plant
By Steven M. Puricelli
Sulfuric acid plants associated with smelters, have historically been an overworked and often neglected pollution control device. They could do little more than manage the wide fluctuations in gas flo
Jan 1, 1998
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Process Improvement in the Thompson Smelter Through Centralized Air Drying
By Wayne C. Stewart
Freezing of high pressure air lines and pneumatic equipment has been a recurring problem in the Thompson Smelter. The particular severity during the winter of 1989-90 resulted in costly process disrup
Jan 1, 1993
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Behavior of Non-Asbestiform Tremolite During Grinding
By D. E. Larson
In cooperation with the National Institute of Environmental Health Science and the National Institute for Occupational Safety and Health the U.S. Bureau of Mines conducted grinding research on non-asb
Jan 1, 1991