Deep Insight on the Occurrence Feature of Iron Minerals in a Cyanide Leaching Residue and Its Effective Recovery with Magnetic Separation

Article Geochemistry & Geophysics

Effect and Mechanism of CaO on Iron Recovery and Desulfurization by Reduction Roasting-Magnetic Separation of High-Sulfur Cyanide Tailings

Zhengyao Li et al.

Summary: This study aimed to recover iron from high-sulfur cyanide tailings using coal-based reduction roasting-magnetic separation. The mechanism of CaO to increase iron recovery and reduce sulfur was investigated. The results showed that the addition of CaO could promote the reduction of iron minerals, improve the metallization degree of iron, and reduce the formation of sulfur.

MINERALS (2022)

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Article Engineering, Chemical

Pulsating high-gradient magnetic separation of chalcopyrite and talc

Yongjun Xian et al.

Summary: The PHGMS method has the potential to effectively separate chalcopyrite from talc. The optimized conditions can produce a high-grade chalcopyrite concentrate from a chalcopyrite-talc mixture with a low talc content.

MINERALS ENGINEERING (2022)

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Article Chemistry, Multidisciplinary

Cleaner recovery of multiple valuable metals from cyanide tailings via chlorination roasting

Hailin Long et al.

Summary: In this study, a process for the clean recovery of multiple valuable metals from cyanide tailings was proposed using chlorination roasting, achieving high recovery rates. Experiments identified optimal conditions, such as chlorinated agent dosage and roasting temperature, for maximum recovery of valuable metals.

SEPARATION SCIENCE AND TECHNOLOGY (2021)

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Article Geochemistry & Geophysics

Mineralogical and Geochemical Characterization of Gold Mining Tailings and Their Potential to Generate Acid Mine Drainage (Minas Gerais, Brazil)

Mariana Lemos et al.

Summary: The study investigated the treatment of sulfide gold ores in metallurgic plants in Nova Lima, Brazil for over 30 years, revealing the potential for acid mine drainage and mobility of elements. Samples from both deactivated and ongoing circuits were analyzed, showing differences in element concentrations and toxic element mobilization. Proper management and control of tailing dams are highlighted as crucial in alkaline drainage environments.

MINERALS (2021)

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Article Green & Sustainable Science & Technology

Comprehensive Reclamation of Valuable Metals from Au-Bearing Cyanide Residue by Chlorination Roasting-Carbothermic Reduction-Magnetic Separation: Recovery of Iron

Pengfei Liu et al.

Summary: Cyanide leaching is commonly used to extract gold from refractory gold ores, resulting in hazardous cyanide tailings which are further processed through chlorination roasting to recover valuable metals, forming high concentration Fe residues. Carbothermic reduction generates magnetic Fe3O4 or metallic Fe from chlorination residues, with subsequent magnetic separation producing high-quality Fe concentrate.

JOURNAL OF SUSTAINABLE METALLURGY (2021)

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Review Green & Sustainable Science & Technology

The detoxification and utilization of cyanide tailings: A critical review

Kaiwei Dong et al.

Summary: Cyanide tailings are hazardous solid wastes generated from the gold mining industry, containing toxic cyanides and valuable elements. Efforts have been made to develop detoxification and utilization technologies, with thermal treatment and autoclaved hydrolysis showing promise for cyanide removal. Recovery of valuable elements from cyanide tailings faces challenges but can bring economic and environmental benefits.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Geochemistry & Geophysics