The Surface Properties and Flotation of Rare-earth Minerals PDF Download
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Author: Pradip
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 422
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Book Description
Author: Pradip
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 422
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Book Description
Author: Eileen Ross Espiritu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"Rare earth elements are the key components of the emerging green technologies such as wind turbines, hybrid vehicles and storage batteries. The expected demand and current production rate is forecasted to result to a short supply of La, Nd, Pr, Dy, and Tb by 2025. This global demand can only be met with constant development of new mines outside of China. Among the projects being developed outside China located in Canada, Niobec rare earth project of Magris Resources Inc. is found to contain the largest resource of rare earth elements with 1058.6 million tonnes at 1.73% total rare earth oxide. The fine grain sizes (-20 [mu]m) of the rare earth minerals present in this ore makes froth flotation the most applicable beneficiation technique for separation. However, literature regarding rare earth mineral flotation is very limited. To process the rare earth ore, fundamental properties of the pure minerals (monazite, bastnäsite and dolomite) must be first then understood through surface characterization (e.g., ATR-FTIR and XPS), thermodynamic calculations (speciation diagrams), electrophoretic measurements (i.e., zeta potential measurements) and single-mineral microflotation tests using three different rare earth mineral collectors, benzohydroxamate, sodium oleate and organic phosphoric acid. Density Functional Theory (DFT)-based molecular modeling were also utilised and was found useful in validating the experimental results. It provided a deeper understanding of the mineral-collector interaction and presented possible conformation of adsorbed species or collectors on the surface of the minerals. The DFT simulations were also able to provide explanation to phenomena that could not be explained with experimental observations alone. The insights acquired through fundamental investigations and the knowledge of the mineralogy provided guidance in the processing of the ore. The observed concentration of rare earth elements in the fine (-20 [mu]m) fraction led to a decision to split the processing of the ore into two routes. This does not only prevent overgrinding of the -20 [mu]m particles, but also achieves a more efficient grinding of the +20 [mu]m particles. The use of specially designed column cell in processing the fines showed significant enrichment and recovery of the rare earth elements. This result was achieved with only one stage of rougher flotation, which was typically obtained through several stages of roughing and cleaning/scavenging. An improvement in the column cell parameters (mechanical aspect) and further investigations regarding the reagent scheme (chemistry aspect) are suggested for future work." --
Author: P. S. Mulukutla
Publisher: Society for Mining Metallurgy & Exploration
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 380
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Author: Institut gornogo dela im. A.A. Skochinskogo
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 104
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Author: Marek Kosmulski
Publisher: CRC Press
ISBN: 142005189X
Category : Science
Languages : en
Pages : 1094
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Book Description
The Most Detailed Resource Available on Points of Zero ChargeWith their work growing in complexity, chemists involved with surface phenomena-related projects have outgrown the common resources available to them on points of zero charge (PZC) of oxides. Reporting on a limited number of materials in a limited number of scenarios, these resources ofte
Author: Dylan Everly
Publisher:
ISBN:
Category : Bastnaesite
Languages : en
Pages : 172
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Book Description
Author: P. Somasundaran
Publisher: Routledge
ISBN: 1351419625
Category : Science
Languages : en
Pages : 776
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Book Description
Reagents in Mineral Technology provides comprehensive coverage of both basic as well asapplied aspects of reagents utilized in the minerals industry.This outstanding, single-source reference opens with an explicit account of flotation fundamentals,including coverage of wetting phenomena, mineral/water interfacial phenomena, flo tationchemistry, and flocculation and dispersion of mineral suspensions.It then discusses flotation of sulfide and nonsulfide minerals, with attention to formation ofclithiolates, formation of metal thiol compounds, application of fatty acids, sulfosuccinic acids,amines, and other collectors.Reagents in Mineral Technology also reviews adsorption of surfactants on minerals .. .details adsorption of polymers .. . and considers the chemistry and application of chelation agentsin minerals separations.Additional chapters consider grinding aids, frothers, inorganic and polymeric depressants,dewatering and filtering aids, analytical techniques, and much more.Unique in its depth of coverage, Reagents in Mineral Technology will prove an invaluablereference for mineral engineers and processors; analytical, surface, colloid, and physical chemists;petroleum, petrochemical, metallurgical, and mining engineers; and for use in advancedundergraduate- and graduate-level courses in these and related fields.
Author: Ismar Borges De Lima
Publisher: Elsevier
ISBN: 0128025689
Category : Science
Languages : en
Pages : 468
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Book Description
Rare Earths elements are composed of 15 chemical elements in the periodic table. Scandium and yttrium have similar properties, with mineral assemblages, and are therefore referred alike in the literature. Although abundant in the planet surface, the Rare Earths are not found in concentrated forms, thus making them economically valued as they are so challenging to obtain. Rare Earths Industry: Technological, Economic and Environmental Implications provides an interdisciplinary orientation to the topic of Rare Earths with a focus on technical, scientific, academic, economic, and environmental issues. Part I of book deals with the Rare Earths Reserves and Mining, Part II focuses on Rare Earths Processes and High-Tech Product Development, and Part III deals with Rare Earths Recycling Opportunities and Challenges. The chapters provide updated information and priceless analysis of the theme, and they seek to present the latest techniques, approaches, processes and technologies that can reduce the costs of compliance with environmental concerns in a way it is possible to anticipate and mitigate emerging problems. Discusses the influence of policy on Rare Earth Elements to help raise interest in developing strategies for management resource development and exploitation Global contributions will address solutions in countries that are high RE producers, including China, Brazil, Australia, and South China End of chapter critical summaries outline the technological, economic and environmental implications of rare earths reserves, exploration and market Provides a concise, but meaningful, geopolitical analysis of the current worldwide scenario and importance of rare earths exploration for governments, corporate groups, and local stakeholders
Author: Ronaldo Herrera Urbina
Publisher:
ISBN:
Category :
Languages : en
Pages : 328
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Book Description
Author: Nagaiyar Krishnamurthy
Publisher: CRC Press
ISBN: 1466576383
Category : Science
Languages : en
Pages : 841
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Book Description
New Edition Now Covers Recycling, Environmental Issues, and Analytical DeterminationEmploying four decades of experience in the rare metal and rare earths industry, the authors of Extractive Metallurgy of Rare Earths, Second Edition present the entire subject of rare earth elements with depth and accuracy. This second edition updates the most impor
