Life Cycle Assessment of Integrated Exploitation Technology for Tailings in Bayan Obo Mine, China

Wang, L; Jiao, G H; Lu, Hongxi; Wang, Q Q

doi:10.15666/aeer/1702_43434359

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…However, concerning the global warming potential, there was a large gap among the different secondary materials analyzed: the REEs extracted from tailings showed a mean value of 9.87 × 10 +2 kg CO2 eq. [48,59,60], whereas the REEs extracted from secondary materials such as electronics, magnets, and fluorescent powders had a mean value of 1.2 × 10 +1 kg CO2 eq. in the selected articles [57,61,62].…”

Section: Resultsmentioning

confidence: 99%

Sustainable Production of Rare Earth Elements from Mine Waste and Geoethics

et al. 2022

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The vulnerability of the rare earth element (REE) supply in a global context of increasing demands entails important economic and political issues, and has encouraged several countries to develop their own REE production projects. This study comparatively evaluated the production of REEs from primary and secondary resources in terms of their sustainability and contribution to the achievement of the Geoethics concept as responsibility towards oneself, colleagues, society, and the Earth system. Twelve categories of potential environmental and social impacts were selected: human health toxicity, global warming or climate change, terrestrial and aquatic eutrophication, acidification potential, particulate matter, resource depletion, water consumption, fresh water ecotoxicity, ionizing radiation, fossil fuel consumption, and ozone depletion. The results showed that the environmental impact of REE production from secondary sources is much lower relative to primary sources. A comparison of conventional and non-conventional REE resources showed that significant impact categories were related to particulate matter formation, abiotic resource depletion, and fossil fuel depletion, which could result from avoiding the tailings disposal before reuse. Based on these findings, governments and stakeholders should be encouraged to increase the recycling of secondary REE sources with Geoethics in mind, in order to balance the high demand of REEs while minimizing the overexploitation of non-renewable resources.

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Section: Resultsmentioning

confidence: 99%

Sustainable Production of Rare Earth Elements from Mine Waste and Geoethics

et al. 2022

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“…One of the main sources of iron and REEs in China is the Bayan Obo ore deposit, located in Inner Mongolia. This deposit is the largest REE deposit in the world, containing about 35% of the global REE reserves, as well as a significant amount of iron, niobium, and thorium [2]. The conventional beneficiation and metallurgical methods for this ore involve crushing, grinding, magnetic separation, flotation, and acid leaching, which result in low recovery rates of REEs and iron, as well as a large amount of tailings generated [3].…”

Section: Introductionmentioning

confidence: 99%

Research of Bayan Obo tailings characteristics and recovery methods

Su,

Tan

2024

E3S Web Conf.

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This paper presents a new method for the recovery of iron and rare earth elements (REEs) from Bayan Obo tailings, which are the waste materials from the extraction of iron and REEs from the Bayan Obo ore deposit in Inner Mongolia, China. The method is based on the combination of microwave-assisted carbothermal reduction and acid leaching. The microwave-assisted carbothermal reduction can effectively reduce the iron oxides and REE oxides in the tailings to metallic iron and REE metals, respectively, and separate them from the gangue minerals. The acid leaching can then dissolve the REE metals from the reduced product and obtain a high-purity REE solution. The effects of various parameters on the performance of the method were investigated and optimized, and the mechanisms and kinetics of the reactions were analyzed and modeled. The results showed that the method can achieve a high recovery rate of iron and REEs, a high selectivity of REEs, a low energy consumption, and a simple process. The economic and environmental benefits of the method are also significant, as it can utilize the Bayan Obo tailings and recover the valuable elements from them, and reduce the waste generation and greenhouse gas emission. The method provides a new and efficient technology for the utilization of Bayan Obo tailings and the recovery of iron and REEs, and contributes to the fundamental understanding of the microwave-assisted carbothermal reduction and acid leaching processes.

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“…O Brasil é detentor da terceira maior reserva de terras raras, no entanto não tem uma produção estabelecida, a utilização em 2021 foi de mil toneladas e como resultado foi obtido estatisticamente a representação de 0,4% da produção mundial (USGS, 2021). De acordo com Wang et al (2019), são limitadas as pesquisas que abordam a avaliação dos impactos da produção de elementos de terras raras, especialmente no que se refere aos ímãs de terras raras.…”

Section: Introductionunclassified

Avaliação Do Ciclo De Vida Da Produção De Óxidos De Terras Raras Para Uso Em Ímãs

PRADOS,

COLPINI,

LOVÓN-CANCHUMANI

2023

Anais Do Encontro Nacional De Engenharia De Produção

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Os ímãs permanentes de terras raras são utilizados cada vez mais em tecnologias limpas, energia, produtos eletrônicos, veículos elétricos, turbinas eólicas, aeroespacial, ímãs de trens de alta velocidade, entre outros. No entanto, a produção de elementos de terras raras, consome muitos insumos e energia, gerando impactos ambientais por causa da sua produção, devido aos resíduos e a concentração de elementos radioativos, por isso, é necessário a realização do estudo de Avaliação do Ciclo de Vida (ACV), para determinar os potenciais impactos gerados por essa produção. O objetivo do presente trabalho é avaliar o ciclo de vida da produção de óxidos de terras raras para subsidiar o uso de ímãs permanentes, e apresentar um cenário da quantificação dos aspectos ambientais. A metodologia utilizada foi baseada nas normas ISO 14040 e ISO 14044, e o método ReCiPe para avaliação dos impactos ambientais. Para tratamento de dados e a avaliação de impacto foram utilizados o banco de dados Ecoinvent 3.8 e o software SimaPro 9.1.1.7. Como resultado do trabalho, foi possível identificar que as principais categorias de impactos são a toxicidade cancerígena humana e a formação de ozônio.Palavras-chave: Elementos de terras raras, Impactos Ambientais, Ímãs permanentes. XLIII ENCONTRO NACIONAL DE ENGENHARIA DE PRODUÇÃO"A contribuição da engenharia de produção para desenvolvimento sustentável das organizações: Cadeias Circulares, sustentabilidade e tecnologias" Fortaleza, Ceará, Brasil, 17 a 20 de outubro de 2023.XLIII ENCONTRO NACIONAL DE ENGENHARIA DE PRODUÇÃO "A contribuição da engenharia de produção para desenvolvimento sustentável das organizações: Cadeias Circulares, sustentabilidade e tecnologias" Fortaleza, Ceará, Brasil, 17 a 20 de outubro de 2023.

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Life Cycle Assessment of Integrated Exploitation Technology for Tailings in Bayan Obo Mine, China

Cited by 9 publications

References 17 publications

Sustainable Production of Rare Earth Elements from Mine Waste and Geoethics

Sustainable Production of Rare Earth Elements from Mine Waste and Geoethics

Research of Bayan Obo tailings characteristics and recovery methods

Avaliação Do Ciclo De Vida Da Produção De Óxidos De Terras Raras Para Uso Em Ímãs

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