Recovery of Iron from Cyanide Tailings with Reduction Roasting–Water Leaching- Magnetic Separation

Yu, Xian Jin; Zhang, Ya Li; Li, Huai Mei

doi:10.4028/www.scientific.net/amr.396-398.486

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…Minerals 2022, 12,1269 air enter into the cyanide tailings and react as shown in Equations ( 1) and ( 2) [2 Therefore, the increase in leaching intensity led to a decrease in cyanide concentrat the leaching solution. To the end, the concentration of cyanide leaching solution te to gradually stabilize, effectively reaching 0 after 104 h of leaching.…”

Section: Effect Of Leaching Intensity On Leachingmentioning

confidence: 99%

“…At present, an area of tens of thousands of square kilometers in China are occupied due to the accumulation of cyanide tailings. In addition, the economic loss caused by the pollution of cyanide tailings every year is up to 10 billion USD [11][12][13][14]. Previous studies on the harm of cyanide tailings mainly focused on the content of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

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Cyanide Release Characteristics of Solid Waste in Gold Smelting Process

et al. 2022

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To explore the relationship between total cyanide and easily liberatable cyanide in cyanide tailings and its impact on the environment, the leaching and release characteristics of total cyanide and easily liberatable cyanide in a tailings pond were studied using a dynamic leaching experiment, and a dynamic model was established. The results show that the release concentration of total cyanide in cyanide tailings is higher than that of easily liberatable cyanide. With the increase in leaching time, the release of cyanide is more sensitive to leaching intensity. The first-order kinetic, second-order kinetic, modified Elovich, double constant, and parabolic diffusion equations were used to fit the cumulative release of cyanide. According to the kinetic results of cyanide cumulative release, in addition to the first-order kinetic equation, the other four equations revealed good fitting for the cyanide leaching process, which shows that cyanide released under simulated rainwater leaching was not simply via surface diffusion, but controlled by multiple factors.

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Section: Effect Of Leaching Intensity On Leachingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cyanide Release Characteristics of Solid Waste in Gold Smelting Process

et al. 2022

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“…According to the different degree of reduction of iron minerals, the magnetic separation product can be divided into iron concentrate and reduced iron [25,26]. Some researchers have used the reduction roasting-magnetic separation process to treat the cyanide tailings and obtained iron concentrate with higher iron grades under optimal conditions [27][28][29]. The thermodynamic reaction law of the iron-containing compound in the reduction roasting process of cyanide tailings was also revealed [30].…”

Section: Introductionmentioning

confidence: 99%

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

Jin-zhi

Liu³

et al. 2022

Minerals

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The increasing demand for iron ore in the world causes the continuous exhaustion of mineral resources. The utilization of iron in secondary resources has become of focus. The present study was carried out to recover iron from high-sulfur cyanide tailings by coal-based reduction roasting-magnetic separation. The mechanism of CaO to increase iron recovery and reduce sulfur was investigated by observing CO and CO2 gas composition produced by the reaction, mineral composition and microstructure, distribution characteristics of sulfur, and the intercalation relationship between iron particles and gangue minerals. The results showed that the addition of CaO could increase the gasification rate of the reducing agent, increase the amount of CO2 gas produced, promote the reduction of iron minerals, and improve the metallization degree of iron. When CaO was not added, sulfur was mainly transformed into troilite, which was closely connected with iron particles and was difficult to remove by grinding and magnetic separation. With the addition of CaO, CaO preferentially formed oldhamite with active sulfur, which reduced the formation of troilite. Oldhamite was basically distributed in an independent gangue structure. There was a clear boundary between iron particles and gangue minerals. Oldhamite could be removed by grinding-magnetic separation.

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“…A big amount of waste slag from the pyrite roasting process is produced every year. [1][2][3][4][5][6][7] Iron in the waste slag can be up to 20%, which is an important iron source for the steel industry. 1 It is of great interest to recover iron from the waste slag of pyrite roasting for maximum use as a mineral resource, reduction of industrial waste on environmental impact and improvement of economical benefits to the related companies.…”

Section: Introductionmentioning

confidence: 99%

“…There are a few reports available in separating iron from pyrite slag, but fewer reports can be found concerning separating iron from sulphur containing slags. 1,3 In this paper iron recovery from pyrite slag is studied and the key factors affecting iron separation, such as temperature, reductant, intensity of magnetic field, particle size of reductant as well as the composition of the waste slag, are discussed.…”

Section: Introductionmentioning

confidence: 99%

Recovery of iron from waste slag of pyrite processing using reduction roasting magnetic separation method

Zhang

Yang

et al. 2013

Canadian Metallurgical Quarterly

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A considerable amount of waste slag from the pyrite roasting process is produced every year. Recovery of iron from the waste slag is of great interest for maximum use of mineral resource, reduction of environment impact and improvement of economical benefits to the related companies. The objectives of the present work are focused on: compare various options for recovery of iron from the waste slag and select the most advantageous option for industrial trial which is roasting of the waste slag under reducing condition followed by magnetic separation; investigate the optimum conditions for maximum recovery of iron from the waste slag. The experimental results show that under the treatment condition in this work about 70% of the iron was recovered from the waste slag, where the iron content in the concentrate is 57%. After the further treatment with chlorinated segregation-magnetic separation, the iron content in the recovered slag can reach 83%. After the treatment, sulphur content in the concentrate was reduced significantly and gangue materials, such as SiO 2 , Al 2 O 3 and TiO 2 , were reduced effectively. This paper is mainly focused on the results of reduction roasting-magnetic separation.À chaque anné e, on produit une quantité importante de dé chets de scorie provenant du procé dé de grillage de la pyrite. La ré cupé ration du fer des dé chets de scorie est d'un grand inté rê t pour l'utilisation maximale de la ressource miné rale, pour la ré duction de l'impact sur l'environnement et pour l'amé lioration des bé né fices é conomiques des compagnies associé es. Les objectifs de ce travail sont centré s sur: la comparaison des diverses options de ré cupé ration du fer à partir des dé chets de scorie et la sé lection de l'option la plus avantageuse pour un essai industriel incluant le grillage des dé chets de scorie avec ré duction, suivi par la sé paration magné tique; l'examen des conditions optimales d'une ré cupé ration maximale du fer à partir des dé chets de scorie. Les ré sultats expé rimentaux montrent qu'avec les conditions du traitement au cours de ce travail, on a ré cupé ré environ 70% du fer à partir des dé chets de scorie, où la teneur en fer dans le concentré é tait de 57%. Aprè s un traitement additionnel par sé gré gation chloré e-sé paration magné tique, la teneur en fer dans la scorie de recouvrement pouvait atteindre 83%. Aprè s le traitement, la teneur en souffre dans le concentré é tait ré duite significativement et les maté riaux de la gangue, comme le SiO 2 , l'Al 2 O 3 et le TiO 2 , é taient effectivement ré duits. Cet article se concentre principalement sur les ré sultats du grillage ré ducteur et sé paration magné tique.

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Recovery of Iron from Cyanide Tailings with Reduction Roasting–Water Leaching- Magnetic Separation

Cited by 4 publications

References 7 publications

Cyanide Release Characteristics of Solid Waste in Gold Smelting Process

Cyanide Release Characteristics of Solid Waste in Gold Smelting Process

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

Recovery of iron from waste slag of pyrite processing using reduction roasting magnetic separation method

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