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Noncommunist World Markets For Rare Earth Minerals - Introduction
By F. E. Katrak
Rare earths markets by definition usually include not only the rare earth elements, but also yttrium. They can be subdivided into a very large light rare earth fraction (about 95 percent by weight of
Jan 1, 1989
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Thermal Extraction of Binders and Lubricants ill Sintering
By Randall M. Gennan
Generally sintering is focused on the bonding of particles at high temperatures; possibly with simultaneous densification. However, an important aspect of sintering occurs during heating at relatively
Jan 1, 1996
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Sulfur contents on the distribution characteristic of Mercury in coals
By Wei Gao, Qing-cai Liu, Cun-fang Lu, Jian Yang, Hinmi Zheng
"The mode of occurrence of sulfur and mercury in 57 Chinese bituminous coals have been examined using X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), and Zeeman atomic absorption mercu
Jan 1, 2011
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Analysis of Mixed Grade Transition in Continuous Thin Slab Casting with EMBR
By J. H. Ahn, J. K. Yoon, Jung-Eui Lee
"A concentration change during grade transition operation in steel thin slab casting is predicted with computer simulation, water model and plant trial. Fluid flow and mixing patterns in various tundi
Jan 1, 2000
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Reduction of Gold and Silver by Hydrogen From Sulfuric Thioorea Solutions
By Guy Deschênes
Thiourea solutions can be used as leach liquors to treat gold ores or slimes. It is also efficient to elute resins or strip solvents that were loaded in cyanides solutions. The hydrogen pressure reduc
Jan 1, 1989
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A Thermodynamic Study Of The Distribution Of Metals Between Copper Matte And Bullion
By Jeffrey R. Taylor
The distribution of low concentrations of Cr, Mn, Rh, Co, Ni, Ag and Fe between copper matte and bullion phases has been measured at 1200oC. These results. together with values for nine other elements
Jan 1, 1983
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High-pressure Hydrides of Iron and Its Alloys
By V. E. Antonov
Hydrides of iron and iron-based alloys are thermodynamically stable only at hydrogen pressures in the gigapascal range and rapidly loose hydrogen under ambient conditions. At low temperatures, however
Jan 1, 2002
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Phosphorus Removal From Slow-Cooled Steelmaking Slags: Grain Size Determination And Liberation Studies
By E. Fregeau-Wu
The major obstacle in recycling steelmaking slags to the blast furnace is their phosphorus content. Removal of the phosphorus, which is primarily associated with the silicate and phosphate phases, wou
Jan 1, 1995
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Interaction of Metals and Protons with Algae. Equilibrium Constants and Ionic Mechanisms for Heavy Metal Removal as Sulfides and Hydroxides
By R. H. Crist
Reactive components of algal cell walls include uronic and alginic acids: In addition, many marine species have half ester sulfate groups which function as fixed anions. Associated metals vary with th
Jan 1, 1991
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Process Optimization by Response Surface Method for Sintering of Chromite Fines by Microwave
By Shenghui Guo, Jian Chen, Hongbo Zhu, Jinhui Peng, Linqing Dai, Qianxu Ye
"Response surface method (RSM) based on mono-factor experiment was applied for the process optimization of sintering of chromite fines by microwave. In RSM analysis, effects of binder addition amount,
Jan 1, 2013
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Study on the Desulfuration of Pyrite Cinder Pellets
By Tiejun Chun, Jian Pan, Deqing Zhu, Zhiyong Ruan
"In this paper, the desulfuration of pyrite cinder pellets was carried out. Phase analysis shows that most sulfur of pyrite cinder exists in the form of elementary sulfur. Most sulfur was removed in p
Jan 1, 2012
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Sorption Concentration of Platinum Group Metals from Nitrate Solutions
By Andrew Shabalin, Vladimir Skorohodov, Svetlana Babaeva, ?lga Makovskaya
"At processing of some kinds of wastes (electronic scrap, secondary materials, spent nuclear fuel) in nitric acid solutions, and also in technology of silver refining, the significant amounts of palla
Jan 1, 2008
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Ultra Fine Boron Nitride (BN) Powder Synthesis in a Non-Transferred Arc Plasma Reactor
By Wenxian Zhu, Xuema Li, Patrick R. Taylor
"Experiments were performed in a non-transferred arc, thermal plasma flow reactor to investigate the synthesis of ultra fine boron nitride (BN) powder from the reaction system of boron oxide (Bz03), m
Jan 1, 1998
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Recovery of Tungsten from Spent V2O5–WO3/TiO2 Catalyst
By In-Hyeok Choi
Currently, spent V2O5–WO3/TiO2 catalysts contribute significant amounts of solid waste following increasing levels of global demand. V2O5–WO3/ TiO2 catalysts usually consist of TiO2 anatase as a suppo
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The Formation of Oxidized Copper Minerals at the Malanjkhand Porphyry Copper Deposit in India, and Implications on Metallurgy
By William Petruk
The mineralogy of the primary and oxidized ores from the Malanjkhand porphyry copper deposit in India was studied to determine ore characteristics that affect metallurgy, and to assess applicable proc
Jan 1, 1987
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Sintering Of Pb {Zr,Ti,(Mg1/3Nb 2/3)}O3 Ceramics By Spark Plasma Sintering And Their Compositional Distribution
By Kazuyuki Kakegawa
The sintering characteristics and the change in the compositional distribution in the PbTiO3 PbZrO3-Pb(Mgl/3Nb2/3)O3 system during the sintering process by spark plasma sintering (SPS) method were exa
Jan 1, 2003
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Bending Mechanical Behavior Of Polyester Matrix Reinforced With Fique Fiber
By Mariana Barcelos, Frederico Muylaert Margem, Giulio Rodrigues Altoé, Pedro Amoy Netto, André Gomes, Sergio Neves Monteiro
Environmentally correct composites, made from natural fibers, are among the most investigated and applied today. In this paper, we investigate the mechanical behavior of polyester matrix composites re
Jan 1, 2015
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Kinetics of Dephosphorization of Iron Carbon Alloys: The Importance of Competing Reactions, Slag Properties and CO Bubbles
By Kezhuan Gu
Data on the kinetics and thermodynamics of dephosphorization are analyzed in terms of the dynamic partition ratio, determined by a combination of slag thermodynamic properties and the balance of oxyge
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Production and Recycle of Dust
By W. G. Davenport
The offgas from flash furnaces inadvertently contains dust. The dust contains 25 to 30% Cu so it must be treated for Cu recovery. This is almost always done by recycling it back through the flash furn
Jan 1, 2001
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Inductively Coupled Plasma Deposition of Ceramic Films: A Review
By Edgar E. Vidal
The deposition of ceramic materials onto substrates is of special interest in the development of surface related technologies. Research interest has been placed on using thermal plasma as the depositi
Jan 1, 2003