Mechanochemical activation on selective leaching of arsenic from copper
A novel application, including mechanochemical pre-treating and alkali leaching, for arsenic selective leaching from copper smelter flue dusts (CSFUs) was developed to overcome the disadvantages of hydrometallurgical methods. ... Finally, mechanochemical activation could be facilitated to separate discrete soluble arsenic …
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A review of copper–arsenic mineral removal from …
The copper minerals could be separated from the copper–arsenic minerals due to more collector adsorption and less oxide/hydroxide species on the surface of …
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Cascade sulfidation and separation of copper and arsenic …
The separation efficiencies of copper and arsenic were higher than 99% by the replacement reaction between arsenic and copper ions when solid-to-liquid ratio was more than 10% at 20 °C within 10 min. CuS was the main phases in precipitate in which copper content was 63.38% in mass fraction.
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Efficient removal and recovery of arsenic from copper …
The flue dust is the main output of arsenic in copper concentrate smelting, which contains around 60% of total input arsenic with a high arsenic content of 5–20% and fine particles (Jarošíková et al., ... reveals that there are three characteristic split peaks assigned to As(III)-S (≈43.4 eV), As(III)-O (≈43.9 eV) and As(0) ...
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Selective leaching of arsenic from copper converter flue …
Cu–As alloy is viewed as one kind of secondary copper resources. It is difficult to simultaneously recover copper and remove arsenic using conventional processes. To separate arsenic and tin from Cu–As alloy (mainly Cu 3 As), an innovative methodology that uses vacuum distillation in the presence of pyrite to form new phase is …
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Separation of arsenic and extraction of zinc and …
Under the optimal conditions, >95.5% of arsenic was separated from high-arsenic copper smelting dusts, while >98.5% of valuable metals were remained in the alkali leaching residues. The concentrations of arsenic and base metals (Cu, Zn, Pb, Bi, …
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Unlocking Value in Copper Arsenic Sulphide Resources …
During the copper arsenic pilot plant campaign (hereafter referred to as the Cu-As Campaign) four separate concentrates were processed. Each of these concentrates contained levels of arsenic in excess of the Chinese smelter import limit of 0.5% [8]. The major elemental compositions for the concentrates
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Arsenic | Definition, Symbol, Uses, & Facts | Britannica
Most commercial arsenic is recovered as a by-product of the smelting of copper, lead, cobalt, and gold ores. Only one stable isotope of arsenic, that of mass 75, occurs in nature. Among the artificial radioactive isotopes is one of mass 76, which has a half-life of 26.4 hours. Arsenic-72, -74, and -76 have been used in medical diagnostic ...
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Iron
Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Show details ... lentils, mung beans, and split peas has been shown to be very low (0.84 to 1.91 percent) and similar to each other (Lynch et al., 1984). Because phytate and iron are ...
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Consortium investigates new ways of reducing …
August 2 2022. Raw copper smelting in a blast furnace. Credit: Fraunhofer IWKS. As the world's largest copper exporter, Chile is encountering a growing number of sulfur-based …
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An effective separation process of arsenic, lead, and zinc
Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting ashes (HACSA). This study developed an effective separation process of arsenic, lead, and zinc from HACSA via alkali leaching followed by sulfide precipitation.
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Treatment of high-arsenic copper smelting flue dust with high copper
A novel pyrometallurgical concept was developed to selectively separate arsenic from high-arsenic copper smelter flue dusts containing high concentrations of copper sulfates, using pyrite as an additive. The optimized process conditions in this work consisted of roasting for 30 min at 550 °C under an inert atmosphere. During the roasting …
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Recovery of Copper, Lead, Zinc, and Arsenic from …
The separation of Cu, Pb, Zn, and As from copper smelting dust through oxidative alkali leaching and sulfide precipitation, as well as the subsequent recovery …
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An effective separation process of arsenic, lead, and …
32515295. Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting …
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Selective removal of arsenic from arsenic-containing …
ABSTRACT. To selectively separate arsenic from arsenic-containing copper dust, this paper reports a new method of treating the dust by carbothermal …
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The separation of arsenic from copper in a Northparkes copper…
In order for the high-arsenic regions of the Northparkes copper–gold orebody to be beneficiated economically, tennantite ((Cu,Fe) 12 As 4 S 13) present in the ore needs to be rejected to enable copper concentrates to meet the typical smelter penalty level of 2000 ppm As. Using a composite sample of high-arsenic drill cores from …
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OPTIONS FOR REMOVING ARSENIC AND TALC FROM A …
Arsenic is a penalty element for smelters and at levels exceeding 0.3% the smelters may reject the concentrate. Arsenic is a problem environmentally for copper smelters and penalties apply when it is high. This paper describes the options for penalty element removal and suitability to incorporate into the modified flowsheet.
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Metals and Alloys | SpringerLink
Arsenic added to copper functions as a deoxidant, taking up oxygen enriched in liquid copper, and is visible in the solid state as a mixture of cuprite copper. Arsenic would form arsenious oxide (As 2 O 3). It is not soluble in copper and would separate as a sublimate (Charles 1967). Hence, arsenic, according to chemo-physical …
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Arsenic April 2021
Chronic (long-term) inhalation exposure to inorganic arsenic in humans is associated with skin, cardiovascular, and neurological effects. Acute oral exposure to inorganic arsenic has resulted in effects on the digestive tract, respiratory tract, central nervous system (CNS), cardiovascular system, liver, and blood and has resulted in death.
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An effective separation process of arsenic, lead, …
Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting ashes …
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Flotation separation of copper sulphides from arsenic …
Despite these disagreements, Eh control has been applied to separate arsenic from copper minerals. Smith et al. (2012) reported some case studies by using pulp potential control to separate copper and arsenic. In one case, tennantite was floated from the other non-tennantite copper minerals ...
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An efficient and clean method for the selective separation of arsenic
This study proposed a new pretreatment of oxygen-enriched roasting and acid leaching to simultaneously separate the arsenic and copper from scrap copper anode slime containing high arsenic and tin. ... and 50% oxygen concentration). Then, copper, arsenic, and nickel were leached simultaneously and the leaching efficiencies …
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Volatilization Mechanization and Behaviors of Arsenic from …
At present, arsenic removal from copper smelting ash can be divided into hydrometallurgical, pyrometallurgical and pyro-hydrometallurgical processes. Zhang et al. 8,12,13,14 studied alkali leaching to separate arsenic. Arsenic removal efficiency was > 99% by controlling appropriate conditions, which achieved the efficient separation of …
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Distribution behavior and deportation of arsenic in copper …
Arsenic is the most important hazardous trace element in copper concentrates. In order to separate arsenic from the smelting processes, a pyrometallurgical treatment with additives was developed ...
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Membranes | Free Full-Text | Combined Electrodialysis and
ED would separate the positively charged copper from the neutral or negatively charged arsenic, even if the concentration of arsenic is much higher than copper. EC would precipitate arsenic in the same cell in the anodic compartment using the same electric current as for the ED part to produce a much lesser volume of sludge with …
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Volatilization Mechanization and Behaviors of Arsenic …
At present, arsenic removal from copper smelting ash can be divided into hydrometallurgical, pyrometallurgical and pyro-hydrometallurgical pro-cesses. Zhang et al.8,12–14 studied alkali leaching to separate arsenic. Arsenic removal efficiency was> 99% by controlling appropriate conditions, which achieved the efficient separation of …
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Mechanochemical activation on selective leaching of arsenic from copper
1. Introduction. Copper smelting flue dusts (CSFUs) are always produced from the electro-refining processing of copper ores and contain various valuable metals like copper, zinc, lead, tin, antimony, and so on (Chen et al., 2012, Vircikova and Havlik, 1999, Li et al., 2011).Especially, the average copper content in CSFUs could come to more …
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Adsorption of Copper and Arsenic from Water Using a Semi
Impact of Metal Ions on Human Health. Arsenic is a toxic element that is harmful to humans and a major pollutant in drinking water. The World Health Organization (WHO) and the US Environmental Protection Agency (EPA) set the guideline value for the maximum level of arsenic contamination in drinking water as 10 μg/L [].Chemically, there …
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Simultaneous recovery of arsenic and copper from copper …
Table S1−S7 listed the chemical composition of the minerals mentioned above. Based on the mineral composition of the CS (Fig. 1 b) and the chemical composition of the mineral (Table S1−S7), the theoretical grades of arsenic and copper in the CS were calculated to be 0.38% and 5.02%, respectively.Fig. 1 c shows that the actual grades of …
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Arsenic removal from acid extraction solutions of copper …
Multi-metal extraction of flue dust from copper smelting is being pursued to meet the increasingly appealing environmental requirements of our modern life. In this paper, the thermodynamic analysis of acid leaching solution was carried out. Ferric arsenate deposits were found in the range of pH = 0–11.63, in the form of FeAsO4 and …
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