World copper (Cu) production has been strongly affected by arsenic (As) content, because As-rich Cu concentrates are not desirable in the metal foundries. When As-rich Cu concentrates are processed by smelting they release As as volatile compounds into the atmosphere and inside furnaces, generating serious risks to human health. In …

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 …

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 to deal with high-arsenic copper smelter flue dust high in copper sulfate. Under the optimized conditions of mixing 30 wt% pyrite and roasting at 550 °C under an …

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 ...

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 …

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 …

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 …

There have been four flowsheets developed to separate copper–arsenic minerals from copper minerals. 8.1. Neves-Corvo, portugal. The Neves-Corvo deposit, located in southern Portugal, is part of the Iberian Pyrite Belt that runs through the southern part of Portugal and Spain. Copper, as chalcopyrite, was the main metal recovered, with …

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 …

A comparison is made among different roasting options (kilns, multi-hearths and fluid beds) to qualify their potential application to arsenic roasting of copper concentrates. Both direct and ...

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 …

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 …

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 ...

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, …

It was difficult to achieve the effective separation of arsenic and tin by these methods. Therefore, an effective and clean pretreatment method for selectively separating arsenic from scrap copper anode slime containing high arsenic and tin via oxygen-enriched roasting followed by acid leaching was proposed. The volatilization rate of …

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 …

The copper, insoluble in water, that is in the calcined ore, is removed by the use of tower liquors, and under the action of this solvent a considerable proportion of the arsenic, antimony and bismuth that remained in the calcined ore is also dissolved. This increases the proportion of these elements that is already present in the tower liquors.

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.

ABSTRACT. To selectively separate arsenic from arsenic-containing copper dust, this paper reports a new method of treating the dust by carbothermal …

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation - …

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 …

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 …

From Figure 2, it can be seen that it is thermodynamically possible to separate copper and arsenic in the regions of overlap between HAsO 4 2 − or AsO 4 3 − and CuO or Cu 2 O. By contrasting both figures, it can be seen that it is not thermodynamically likely to separate copper from both arsenic and bismuth in a single …

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.

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 ...

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 …

Abstract. Leaching method was used to separate copper and arsenic in the arsenic filtration cake, which was achieved by the formation of CuS in the residue and AsO4³⁻ in the solution during the ...

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.

Even if they were, they would still only split the same amount of arsenic between a low-arsenic copper concentrate and a high-arsenic copper concentrate. Either way, a new processing technology needs to be adopted if the copper industry is to avoid the transport and smelting of increased units of arsenic from these deposits.

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 ...

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

From this point of view, two ion-exchange (IEX) technologies were used to separate and concentrate its main elements (Cu, Zn and As): (i) selectrodialysis (SED) followed by (ii) IEX resins. Figure 1 shows the flow chart of integrated processes (SED and IEX resins) for copper and zinc recovery and arsenic removal from acidic metallurgical …

This study proposed a new pretreatment of oxygen-enriched roasting and acid leaching to simultaneously separate the arsenic and copper from scrap copper …

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 …