Optimizing the selective precipitation of iron to produce yellow pigment from acid mine drainage

Silva, Rodrigo de Almeida; Secco, Marina Paula; Lermen, Richard Thomas; Schneider, Ivo; Hidalgo, Gelsa Edith Navarro; Sampaio, Carlos Hoffmann

doi:10.1016/j.mineng.2019.02.040

Cited by 25 publications

(14 citation statements)

References 14 publications

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“…The manipulation of process variables allows distinct products and colours compatible with market demands. However, it should be noted that the synthesis of pigments is sensible to the kind of chemicals chosen, concentrations applied, and the procedure in general [20].…”

Section: Resultsmentioning

confidence: 99%

Hydrometallurgical Processing of Brazilian Iron Ore Tailings for the Synthesis of Pigments

Almeida¹,

Schneider²

2022

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The aim of this study was to investigate the synthesis of iron oxide pigments from IOT. The sample of IOT was obtained through mining activity of the Quadrilátero Ferrífero in the state of Minas Gerais, Brazil. The procedure was carried out by hot acid leaching with hydrochloric acid (HCl) which allowed the recovery of about 95% of the iron in a liquor. The iron-based pigmentsred (IBP_R), black (IBP_B), and yellow (IBP_Y)-were synthetised from the liquor by selective precipitation, crystallisation, and thermal procedures. The pigments were characterised by particle size distribution, mineral and chemical compositions, as well as colourimetric properties. The process of synthesis was successful and the procedure was shown to maximise the utilisation of mineral resources and minimise the environmental, social, and economic impacts associated with IOT disposal.

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Section: Resultsmentioning

confidence: 99%

Hydrometallurgical Processing of Brazilian Iron Ore Tailings for the Synthesis of Pigments

Almeida¹,

Schneider²

2022

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“…Selective precipitation was optimized to obtain yellow pigment from AMD while simultaneously treating the water (Silva et al, 2019). The quality of the pigment strongly depended on the presence of contaminants.…”

Section: Recovery Of Resources From Mine Drainagementioning

confidence: 99%

Mine drainage: Remediation technology and resource recovery

Viadero

Zhang

et al. 2020

Water Environment Research

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Drainage from current and historic mining operations remains a persistent environmental problem. Numerous research and development efforts were made in 2019 with a goal to minimize the impact of mine drainage on the environment, while other research endeavors addressed the mine drainage issue from a different perspective, where mine drainage was considered a resource for water and valuable products, such as metals, sulfuric acid, and rare earth elements. Thus, this review has two main sections: (a) focusing on research efforts in mine drainage remediation technology, and (b) emphasizing advances in resource recovery from mine drainage. The first section covers traditional and emerging passive and active treatment technologies. The second section summarizes resource recovery efforts using various technologies, such as selective precipitation, membrane process, and biological systems.

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“…Wei et al demonstrated that high recovery of both metals was possible in lime neutralization systems, albeit at a purity in the low 90% range [33]. The production of high purity iron products from AMD was demonstrated by reprocessing the low purity sludge using nitric acid and potassium hydroxide [34] and alternatively through the usage of high cost soda ash neutralization agent [35]. Both options however require expensive reagents to yield low value products.…”

Section: Introductionmentioning

confidence: 99%

A Fundamental Economic Assessment of Recovering Rare Earth Elements and Critical Minerals from Acid Mine Drainage Using a Network Sourcing Strategy

et al. 2021

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In recent years, acid mine drainage (AMD) has emerged as a promising unconventional source of rare earth elements (REEs) and other critical minerals (CMs) such as cobalt and manganese. In this regard, AMD provides a natural heap leaching effect that extracts and concentrates REE/CM from the host strata creating a partially enriched feedstock suitable for downstream extraction, separation, and recovery. While several prior studies have described processes and approaches for the valorization of AMD, very few have described the supply chain and infrastructure requirements as well as the associated economic assessment. To that end, this paper provides a fundamental economic assessment of REE/CM recovery from AMD using a network sourcing strategy in addition to a robust, flexible feedstock separations and refining facility. The methodology of this paper follows that of a typical techno-economic analysis with capital and operating costs estimated using AACE Class IV (FEL-2) guidelines. To demonstrate the range of possible outcomes, four pricing scenarios were modeled including contemporary prices (September, 2021) as well as the minimum and maximum prices over the last decade. In addition, five production scenarios were considered reflecting variations in the product suite, ranging from full elemental separation to magnet REE and CM production only (i.e., Pr, Nd, Tb, Dy, Y, Sc, Co, and Mn). The results of this analysis show that, with the exception of the minimum price scenario, all operational configurations have positive economic indicators with rates of return varying from 25% to 32% for the contemporary price scenario. The optimal configuration was determined to be production of Co, Mn, and all REEs except for mischmetal, which is not recovered. Sensitivity analysis and Monte Carlo simulation show that capital cost and HCl consumption are the two major factors influencing rate of return, thus indicating opportunities for future technology development and cost optimization. Implications of the study and a cooperative profit-sharing model for sourcing are also described.

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Optimizing the selective precipitation of iron to produce yellow pigment from acid mine drainage

Cited by 25 publications

References 14 publications

Hydrometallurgical Processing of Brazilian Iron Ore Tailings for the Synthesis of Pigments

Hydrometallurgical Processing of Brazilian Iron Ore Tailings for the Synthesis of Pigments

Mine drainage: Remediation technology and resource recovery

A Fundamental Economic Assessment of Recovering Rare Earth Elements and Critical Minerals from Acid Mine Drainage Using a Network Sourcing Strategy

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