☆ 4.7 Review

Review of efficient recycling and resource utilization for rare earth molten salt electrolytic slag

MINERALS ENGINEERING (2023)

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Article Chemistry, Applied

Effect of roasting activation of rare earth molten salt slag on extraction of rare earth, lithium and fluorine

Zhifang Tong et al.

Summary: A new process of synergistic roasting and acid leaching was proposed to extract rare earth elements (REEs), Li and F from electrolytic slag of rare earth molten salt. The effects of roasting factors on leaching REEs, Li, and F in slag were investigated, and the migration mechanism of minerals in the roasting and leaching process was analyzed. The results showed that the synergistic roasting and activation of molten salt slag were feasible, leading to high leaching rates of Nd, Pr, Gd, Li, and F.

JOURNAL OF RARE EARTHS (2023)

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Article Engineering, Chemical

Recovery of rare earths, lithium, and fluorine from rare earth molten salt electrolytic slag by mineral phase reconstruction combined with vacuum distillation

Yaobin Lai et al.

Summary: A novel green method for the recovery of rare earths (REs), fluorine (F), and lithium (Li) from rare earth molten salt electrolytic slag (REMSES) was proposed and demonstrated by mineral phase reconstruction combined with vacuum distillation. The optimized conditions for the roasting process were found to be a temperature of 600 degrees C, LiOH center dot H2O dosage coefficient of 1.1 times, and roasting time of 4 h. Vacuum distillation was shown to effectively remove F, with a removal rate of 99.98% and a recovery rate of LiF of 98.96%.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Review Environmental Sciences

Progress in comprehensive utilization of electrolytic manganese residue: a review

Wenlei Li et al.

Summary: This paper conducted a statistical analysis of EMR-related publications from 2010 to 2022 using a comprehensive literature database, focusing on harmless green treatment and resource utilization. The results showed that the research mainly focused on chemical hazard-free treatment and manufacturing building materials. Studies on EMR in other fields such as biological harmlessness, applied electric field harmlessness, manganese series materials, adsorbents, geopolymers, glass-ceramics, catalysts, and agriculture were also reported. Suggestions were provided to solve the EMR problem, aiming to contribute to the clean disposal and efficient utilization of EMR.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)

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Article Green & Sustainable Science & Technology

Recovery of Rare-Earth Elements from Molten Salt Electrolytic Slag by Fluorine Fixation Roasting and Leaching

Peng Xing et al.

Summary: The separation of rare earth elements (REEs) from rare earth molten salt slag has been a challenge due to the high fluorine content. This study presents a clean process for recycling REEs from the slag using fluorine fixation roasting and hydrometallurgical leaching. The leaching efficiencies of REEs were above 97% under optimal conditions.

JOURNAL OF SUSTAINABLE METALLURGY (2022)

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Article Environmental Sciences

Effects of dominant plant growth on the nutrient composition and bacterial community structure of manganese residues

Yang Luo et al.

Summary: The growth of three dominant plant species in manganese residue disposal sites in eastern Guizhou Province, China, improved the nutritional composition of manganese residues and increased the diversity of bacterial communities. Organic matter and available nitrogen were identified as the main factors affecting bacterial community structure in manganese mine residue.

INTERNATIONAL JOURNAL OF PHYTOREMEDIATION (2022)

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Article Materials Science, Ceramics

Preparation of enstatite-spinel based glass-ceramics by co-utilization of ferronickel slag and coal fly ash

Wenxing Shang et al.

Summary: This study proposed a new approach to prepare high-quality enstatite-spinel based glass-ceramics from a mixture of ferronickel slag (FNS) and coal fly ash (CFA). By examining the effect of CFA content on the preparation process, the study showed that controlling the crystallization process can achieve excellent product properties.

CERAMICS INTERNATIONAL (2021)

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Article Metallurgy & Metallurgical Engineering

Selective extraction of rare earths and lithium from rare earth fluoride molten-salt electrolytic slag by nitration

Huazhou Hu et al.

Summary: This study utilized a selective nitration method to extract rare earth elements (REEs) and Li from electrolytic slag, successfully separating Fe and Al oxides. The fluorine volatilized as HF during nitration and was absorbed by an alkaline solution, effectively removing impurities and achieving high purity REE oxalates.

HYDROMETALLURGY (2021)

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Review Environmental Sciences

Harmless disposal and resource utilization for secondary aluminum dross: A review

Hanlin Shen et al.

Summary: Secondary aluminum dross (SAD) is a solid waste containing alumina, aluminum nitride, salts, etc. It can be utilized as a resource or pollutant. The main methods for utilization are pyrometallurgy and hydrometallurgy, with the former showing lower resource consumption and emissions compared to the latter.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Engineering, Chemical

Extraction and optimization of neodymium from molten fluoride electrolysis

Prince Sarfo et al.

Summary: The paper discusses the extraction of neodymium from rare earth oxides using pyrometallurgical approaches and electrolysis, with a focus on the establishment of conditions for producing pure Nd metal from REOs. It also expands on the use and verification of diagrams through experimental studies, leading to statistical recovery models based on molten salt electrolysis for extracting neodymium from fluoride solutions.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

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Review Chemistry, Physical

Froth flotation of fluorite: A review

Zhiyong Gao et al.

Summary: Fluorite, as a scarce nonrenewable strategic non-metallic mineral resource, is crucial in various fields and its demand continues to grow. This review provides insight into the crystal structure, common reagents in fluorite flotation, and the synergistic effect of collectors and depressants. It also summarizes widely seen fluorite-flotation cases for separation from other minerals, offering new understanding and potential guidance for similar mineral flotation.

ADVANCES IN COLLOID AND INTERFACE SCIENCE (2021)

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Review Engineering, Environmental

Comprehensive review on metallurgical recycling and cleaning of copper slag

Hongyu Tian et al.

Summary: Copper slag, a potentially harmful waste generated during copper smelting, contains valuable metals like Cu, Fe, Zn, Co, and Ni as well as hazardous elements such as Pb and As. It is important to subject copper slag to further metallurgical recycling and cleaning for economic and environmental benefits. Improved processes focusing on high recycling efficiency, low energy consumption, and low secondary environmental pollution are needed for sustainable waste utilization of copper slag.

RESOURCES CONSERVATION AND RECYCLING (2021)

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Article Materials Science, Multidisciplinary

Rare Earth Recovery from Fluoride Molten-Salt Electrolytic Slag by Borax Roasting-Hydrochloric Acid Leaching

Youming Yang et al.

JOM (2020)

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Review Geology

The story of rare earth elements (REEs): Occurrences, global distribution, genesis, geology, mineralogy and global production

Nimila Dushyantha et al.

ORE GEOLOGY REVIEWS (2020)

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Article Engineering, Environmental

Effect of Chinese policies on rare earth supply chain resilience

Nabeel A. Mancheri et al.

RESOURCES CONSERVATION AND RECYCLING (2019)

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Article Materials Science, Ceramics

Effects of Al/Na and heat treatment on the structure and properties of glass ceramics from molten blast furnace slag

Wentao Zhang et al.

CERAMICS INTERNATIONAL (2019)

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Article Chemistry, Physical

Physicochemical property and chromium leaching behavior in different environments of glass ceramics prepared from AOD stainless steel slag

Shuai Zhang et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2019)

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Article Green & Sustainable Science & Technology

Characteristics and properties of glass-ceramics using lead fuming slag

De'an Pan et al.

JOURNAL OF CLEANER PRODUCTION (2018)

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Article Green & Sustainable Science & Technology

Extraction of rare earth elements from fluoride molten salt electrolytic slag by mineral phase reconstruction

Yong Liang et al.

JOURNAL OF CLEANER PRODUCTION (2018)

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Review Materials Science, Multidisciplinary

Corrosion in the molten fluoride and chloride salts and materials development for nuclear applications

Shaoqiang Guo et al.

PROGRESS IN MATERIALS SCIENCE (2018)

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Article Engineering, Environmental

Estimating perfluorocarbon emission factors for industrial rare earth metal electrolysis

Bofeng Cai et al.

RESOURCES CONSERVATION AND RECYCLING (2018)

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Article Engineering, Environmental

Life cycle environmental assessment of industrial hazardous waste incineration and landfilling in China

Jinglan Hong et al.

INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT (2017)

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Article Green & Sustainable Science & Technology

Rare Earths from Mines to Metals Comparing Environmental Impacts from China's Main Production Pathways

Jason C. K. Lee et al.

JOURNAL OF INDUSTRIAL ECOLOGY (2017)

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Review Chemistry, Physical

Electrodeposition of alloys and compounds from high-temperature molten salts

Yuekun Gu et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2017)

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Article Chemistry, Multidisciplinary

Leaching of fluorine and rare earths from bastnaesite calcined with aluminum hydroxide and the recovery of fluorine as cryolite

Jingui He et al.

RSC ADVANCES (2017)

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Article Green & Sustainable Science & Technology

China's Rare Earths Production Forecasting and Sustainable Development Policy Implications

Xibo Wang et al.

SUSTAINABILITY (2017)

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Article Green & Sustainable Science & Technology

Reducing Greenhouse Gas Emission from the Neodymium Oxide Electrolysis. Part I: Analysis of the Anodic Gas Formation

Hanno Vogel et al.

JOURNAL OF SUSTAINABLE METALLURGY (2017)

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Article Materials Science, Ceramics

Utilization of Electrolytic Manganese Residues in Production of Porous Ceramics

Fang-Fang Wu et al.

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY (2016)

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Article Metallurgy & Metallurgical Engineering

Review on hydrometallurgical recovery of rare earth metals

Manis Kumar Jha et al.

HYDROMETALLURGY (2016)

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Article Green & Sustainable Science & Technology

Environmental Impacts of Rare Earth Mining and Separation Based on Eudialyte: A New European Way

Andrea Schreiber et al.

RESOURCES-BASEL (2016)

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Review Engineering, Chemical

Process development to recover rare earth metals from monazite mineral: A review

Archana Kumari et al.

MINERALS ENGINEERING (2015)

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Article Environmental Studies

Did China's rare earth export policies work? - Empirical evidence from USA and Japan

Lu Zhang et al.

RESOURCES POLICY (2015)

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Proceedings Paper Environmental Sciences

Modelling of Household Hazardous Waste (HHW) Management in Semarang City (Indonesia) by Using Life Cycle Assessment (LCA) Approach to Reduce Greenhouse Gas (GHG) Emissions

Elanda Fikri et al.

BASIC RESEARCHES IN THE TROPICAL AND COASTAL REGION ECO DEVELOPMENTS (2015)

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Proceedings Paper Business, Finance

Rare Earth Elements: Industrial Applications and Economic Dependency of Europe

Georgios Charalampides et al.

INTERNATIONAL CONFERENCE ON APPLIED ECONOMICS (ICOAE) 2015 (2015)

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Article Chemistry, Applied

Introducing a multi-criteria indicator to better evaluate impacts of rare earth materials production and consumption in life cycle assessment

N. Adibi et al.

JOURNAL OF RARE EARTHS (2014)

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Review Energy & Fuels

Life-cycle assessment of the production of rare-earth elements for energy applications: a review

Julio Navarro et al.

FRONTIERS IN ENERGY RESEARCH (2014)

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Article Metallurgy & Metallurgical Engineering

Recovery of rare earth elements adsorbed on clay minerals: I. Desorption mechanism

Georgiana A. Moldoveanu et al.

HYDROMETALLURGY (2012)

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