Leaching of metals from rebellious middling of copper-zinc pyritic ores flotation

Крылова, Л. Н.; Moshchanetskiy, P. V.; Shirinya, N. V.

doi:10.17580/or.2015.06.03

Cited by 4 publications

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“…Copper and zinc content in the residues obtained during the leaching at 40 and 80°C comprised 17.0% and 4.0% and 16.4% and 2.5%, respectively. Thus, ferric leaching made it possible to decrease zinc content in copper-zinc concentrate that may increase quality of copper-zinc concentrates that was demonstrated previously by the example of other copper-zinc products and ferric sulfate solution [12].…”

Section: Resultsmentioning

confidence: 77%

“…It was shown that pregnant solutions obtained during treatment of flotation tailings can be used for oxidative leaching of copper from slags as these solutions contain high concentrations of ferric iron ions, strong oxidants [11]. Leaching with ferric iron solutions is promising method for treatment of different raw materials including slags and substandard concentrates [9,11,12]. Thus, flotation tailings may be used not only as source of metals but also for obtaining ferric iron ions, which can be used for treatment other products.…”

Section: Introductionmentioning

confidence: 99%

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Two-Stage Agitation Leaching of Old Flotation Tailings

Булаев

Melamud

Boduen

2019

SSP

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The goal of the present work was to develop hydrometallurgical approaches based on acid leaching for selective extraction of base metals from the sample of old flotation tailings as well as obtaining solution, which can be used for leaching of substandard copper-zinc concentrate. Old flotation tailings contained 23.2% of iron, 0.36% of copper, and 0.23% of zinc. Copper-zinc concentrate contained 23.8% of iron, 16% of copper, and 5.3% of zinc. Agitation leaching of old flotation tailings with distilled water and sulfuric acid solutions (of 0.5 to 10% H2SO4) for 3 h at pulp density of 20% made it possible to extract of 26 to 34% and of 58 to 70% of copper and zinc, respectively. Concentrations of copper and zinc in the pregnant solutions were of 0.19 to 0.25 g/L and of 0.27 to 0.32 g/L, respectively. The increase in H2SO4 concentration up to 10% did not lead to significant increase in base metals extraction but led to significant increase in iron ions concentration in the pregnant solutions. Pregnant solution obtained during the leaching with water contained less than 1 g/L of iron ions, while that obtained during the leaching with 10% sulfuric acid contained about 9 g/L of iron ions. Therefore, two-stage acid leaching with water and 10% sulfuric acid was proposed for selective extraction of non-ferrous metals in the first stage and obtaining of ferric iron solution in the second stage. Two-stage leaching at pulp density of 40% with water made it possible to extract 31 and 64% of copper and zinc, respectively. It was shown, that second stage did not allow to increase non-ferrous metals extraction but made it possible to obtain solution containing 11g/L of ferric iron. This pregnant solution was used for oxidative leaching of copper-zinc concentrate. Leaching at 80°C made it possible to extract 13 and 48% of copper and zinc, respectively.

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Section: Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Two-Stage Agitation Leaching of Old Flotation Tailings

Булаев

Melamud

Boduen

2019

SSP

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“…Different hydrometallurgical methods including bioleaching, which is successfully used for the treatment of low-grade sulfide ores, and acid leaching were proposed to extract metals from different flotation samples. Numerous studies demonstrated that non-ferrous and noble metals can be successfully extracted from flotation tailings [5][6][7][10][11][12]. In the same time, pregnant solutions obtained during leaching of old flotation tailings often contained high concentrations of iron ions, which can be by an order of a magnitude higher than concentrations of base metals, that impedes further extraction of non-ferrous metals from pregnant solutions [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies demonstrated that non-ferrous and noble metals can be successfully extracted from flotation tailings [5][6][7][10][11][12]. In the same time, pregnant solutions obtained during leaching of old flotation tailings often contained high concentrations of iron ions, which can be by an order of a magnitude higher than concentrations of base metals, that impedes further extraction of non-ferrous metals from pregnant solutions [10][11][12]. Thus, processing of old flotation tailings should provide selective extraction of valuable metals and obtaining solutions appropriate for further extraction of non-ferrous metals.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to non-ferrous metals, old flotation tailings may be a source of ferric iron, which is strong oxidant that can be used for the leaching of non-ferrous metals from different raw materials and wastes including slags, substandard concentrates, and electronic wastes [10,[12][13][14]. In our previous work, we demonstrated that pregnant solutions obtained during acid leaching of flotation tailings containing ferric iron ions can be used for oxidative leaching of copper and zinc from slags [12].…”

Section: Introductionmentioning

confidence: 99%

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Selective Acid Leaching of Copper and Zinc from Old Flotation Tailings

Булаев

Melamud

2020

MSF

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The goal of the present work was to develop hydrometallurgical method based on acid leaching, which makes it possible to perform selective extraction of non-ferrous metals from old flotation tailings. Leaching was performed with sulfuric acid solutions (from 0.5 to 10%) and distilled water. Leaching was carried out using percolators and bottle agitator. Percolators were loaded with 100 g of old tailings, and leaching was performed with 100 mL of acid solutions. Pulp density during agitation leaching (S: L) was 1: 5. Two samples of old flotation samples were studied. The first sample of flotation tailings contained 0.26% of copper, 0.22% of zinc, and 17.4% of iron; while the second sample contained 0.36% of copper, 0.23% of zinc, and 23.2% of iron. Percolation leaching made it possible to extract up to 43 and 47% of Cu and Zn from the first sample. Extraction rate was maximum during the leaching with 1 and 2.5% sulfuric acid solutions. During the agitation leaching, the maximum extraction rate was reached with a 2.5% sulfuric acid solution (52 and 54% Cu and Zn), but the leaching rate with all solutions and distilled water differed insignificantly. Percolation leaching made it possible to extract up to 54 and 37% of Cu and Zn from the second sample of tailings, while agitation leaching made it possible to extract up to 34 and 68% Cu and Zn, respectively. The rate of non-ferrous metals extraction from the second sample with water did not differ significantly from that of obtained in the experiments with sulfuric acid solutions. In all experiments, the increase in the H2SO4 concentration led to the increase in concentrations of iron ions in productive solutions, which impedes the extraction of non-ferrous metals from solutions. Thus, it was possible to reach selective leaching of non-ferrous metals and to obtain solutions with relatively low concentrations of iron ions.

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Intensification of sulfuric acid leaching of copper from sulfide concentrates with the use of ozone and iron ions

Крылова

2019

Izv.VUZ. Tsvet. Met.

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Исследования выполнены с целью установления закономерностей сернокислотного растворения сульфидов металлов с участием экологически безопасных окислителей -озона и ионов Fe(III), определения параметров и режимов интенсификации извлечения металлов в раствор, уменьшения расхода окислителей и направлены на разработку наименее экологически напряженных, рентабельных способов извлечения цветных металлов из сульфидных руд, продуктов обогащения и техногенных отходов. Объектами изучения были сульфидный медный концентрат флотационного обогащения руды Удоканского месторождения крупностью 90 % -0,074 мм с содержанием меди 24,5 % и озон концентрацией 80-180 мг/л в газовой смеси с кислородом (ОКС), подающийся в реактор со скоростью 1-5 мл/с. Закономерности изучены в диапазоне концентраций серной кислоты 20-100 г/л и ионов Fe(III) 7,8-29,2 г/л при температуре 18-60 °С в реакторах с перемешиванием и соотношении Т : Ж = 1,1÷1,5. Установлено, что использование ионов Fe(III) и озона позволяет значительно интенсифицировать излечение меди из сульфидов в раствор серной кислоты. Извлечение меди из сульфидов повышается пропорционально увеличению содержания Fe(III) с 7,8 до 29,25 г/л -в 2,4 раза. Озон эффективно окисляет Fe(II) и регенерирует ионы Fe(III). При повышении температуры и концентрации железа расход озона на окисление возрастает: на 1 моль Fe расходуется 0,22 моль О 3 , что больше теоретического значения 0,17. Повышение скорости извлечения меди из сульфидов с использованием озона достигается при увеличении температуры с 20 до 50 °С (в 1,4 раза), концентрации озона с 85 до 180 мг/л (в 3 раза), скорости подачи ОКС с 1 до 5 мл/с (в 2,7 раза при 20 °С, в 3,9 раза при 50 °С), добавлении ионов Fe(III) (в ~1,5 раза при 50 °С, [Fe(III)] = 10 г/л). Наибольшую окислительную активность в растворе серной кислоты обеспечивают продукты разложения озона при температуре 50 °С, когда его растворимость снижается. Коэффициент использования озона и его удельный расход на извлеченную медь снижаются при увеличении скорости подачи ОКС с 1 до 5 мл/с (при 20 °С в 1,42 раза, при 50 °С в 1,16 раза) и повышаются при росте температуры и концентрации ионов Fe(III) вследствие быстрого разложения озона и его непроизводительного использования на окисление железа.Ключевые слова: сульфиды, медь, озон, озонокислородная смесь, ионы железа (III), серная кислота, окисление, растворение, извлечение металлов в раствор.Крылова Л.Н. -канд. техн. наук, вед. науч. сотрудник кафедры «Обогащение и переработка полезных ископаемых и техногенного сырья» НИТУ МИСиС (119049, г. Москва, Ленинский пр-т, 4

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Leaching of metals from rebellious middling of copper-zinc pyritic ores flotation

Cited by 4 publications

References 0 publications

Two-Stage Agitation Leaching of Old Flotation Tailings

Two-Stage Agitation Leaching of Old Flotation Tailings

Selective Acid Leaching of Copper and Zinc from Old Flotation Tailings

Intensification of sulfuric acid leaching of copper from sulfide concentrates with the use of ozone and iron ions

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