Abstract. 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 …

@article{Yang2022LeachingBO, title={Leaching Behaviors of Copper and Arsenic from high-arsenic copper sulfide concentrates by Oxygen-Rich Sulfuric Acid Leaching at Atmospheric Pressure}, author={Weijiao Yang and Long Qian and Bingjie Jin and Qingmei Feng and Lei Li and Kun Yun He and Jinlei Yang}, journal={Journal of Environmental …

The copper and arsenic bioavailable fraction decreased significantly, while the low bioavailability fraction increased. The germination index increased above 50%, which showed that the compost was free of toxic substances. ... The treatment with copper and arsenic in cow manure recorded a high value (4.2.6 ds/m) compared to other …

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 …

1 Citation. Explore all metrics. Abstract. Traditional electro-deposition techniques turn out ineffective in removing excessive arsenic (As) impurities and may …

Various hydrometallurgical methods have been proposed for treating high arsenic copper ores and concentrates. This topic is not covered in this review. Arsenic in copper …

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.

Copper (Cu) is the third of the most consumed metals in the world. The reserve-to-production ratio of Cu is much lower than that of other common metals such as iron (Fe) and aluminum (Al) [].As Cu ore resources deplete, low-grade ores with impurities rich in arsenic (As) contents gradually supplement the pyrometallurgical production …

Arsenic, antimony, bismuth and other elements with potentials similar to that of copper are harmful impurities in the copper electrolytic refining process and may precipitate in the cathode discharge when the concentration of Cu 2+ in the electrolyte is low or when the current density is high, thereby reducing the copper cathode purity [5], [6].

1. Introduction. The pollution caused by arsenic, lead, cadmium, and other impurities affects the whole process in copper metallurgy. With the sharp reduction in the supply of high-grade and low-impurity copper concentrates, a large quantity of copper concentrates with high arsenic content has been used as the raw materials.

Arsenic is a natural component of the earth's crust and is widely distributed throughout the environment in the air, water and land. It is highly toxic in its inorganic form. People are exposed to elevated levels of inorganic arsenic through drinking contaminated water, using contaminated water in food preparation and irrigation of food crops ...

The partial roasting of high-arsenic copper concentrates at 973 K/998 K (700 °C/725 °C) under controlled atmosphere can remove > 95 pct of the arsenic contained in the concentrates, leaving a ...

Arsenic is an unresolved problem in the mining industry considering the fact that most of the new copper deposits have high arsenic contents; stricter environmental restrictions for handling, transporting and processing complex materials are expected and stable abatement of arsenic is not extensively applied. In 2018 Chile produced 24.5% of …

Arsenic (As) is a potentially toxic element with variable valence states. Due to high toxicity and bioaccumulation, As can pose a severe threat to the quality of the ecology as well as human health. In this work, As(III) in water was effectively removed by biochar-supported copper ferrite magnetic composite with persulfate.

The efficient and safe disposition of arsenic (As)-containing copper slag depends on the accurate understanding of the As species and their corresponding leaching toxicity. ... ZHANG Hui-bin, LIU Xin-li, JIANG Yao, GAO Lin, YU Lin-ping, LIN Nan, HE Yue-hui, LIU C T. Direct separation of arsenic and antimony oxides by high-temperature …

Arsenic is a naturally occurring, metalloid component of the Earth's crust. Minuscule quantities of arsenic occur in all rock, air, water, and soil. A metalloid is a substance that is not a ...

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 …

An oxygen-enriched bottom-blown smelting process has been proposed to extract valuable metals and remove arsenic from high-arsenic copper dross. PbO, PbS, Cu2S, and Cu5As2 were the main components of the copper dross. Iron scrap, calcium carbonate, coke, and silica were added as flux in the smelting process. Mineralogical …

The experimental results showed that temperature and Na 2 S concentration are important variables in the baking step for efficient arsenic removal. In experiments using a chalcopyritic copper concentrate containing 2.2% arsenic as enargite, 94% of the arsenic was removed when the concentrate was baked at 85 °C for 10 min by using 2.5 times the ...

The partial roasting of high-arsenic copper concentrates at 973 K/998 K (700 °C/725 °C) under controlled atmosphere can remove > 95 pct of the arsenic contained in the concentrates, leaving a calcine with 52 to 68 wt pct bornite, 10 to 13 wt pct chalcopyrite and 2 to 5 wt pct magnetite, with 8 to 24 wt pct remnant chalcocite. The …

Copper concentrates with high arsenic contents must be pretreated before conventional smelting to prevent environmental pollution with arsenic compounds. In this work, experimental results ...

With the sharp reduction in the supply of high-grade and low-impurity copper concentrates, a large quantity of copper concentrates with high arsenic content has been used as the raw materials. Thus, a large amount of arsenic-containing pollutants and byproducts are inevitably produced. Especially for arsenic-containing copper slag, …

Under these optimal conditions, the arsenic content in the residue was 10.06% by XRF analysis. The copper powder and high-arsenic residue were characterized by SEM, and the results are presented in Fig. 5 a and b, respectively. The surface of the copper powder particle became rough, and a product layer was formed after the arsenic …

High arsenic copper sulfide concentrates (HACSC) are becoming increasingly common in the world. Copper pyrometallurgy brings a series of problems, such as arsenic-containing dusts and waste acids that are difficult to treat. Hydrometallurgical process is an attractive alternative to treat HACSC. This work dealt with the leaching …

Arsenic species in copper smelting ash have an important effect on recovery of valuable metals and ecological conservation. In this study, a new process for removing …

The leaching of arsenic and copper in the concentrate greatly exceeds the safe value, which warns of the need for special attention to variations in external conditions during the storage and transit of the concentrate. Overall, separating hazardous CS into high-arsenic concentrate and non-hazardous tailings by flotation is a preferable option.

High-arsenic copper concentrates. Posted by Daniel Gleeson on 23rd February 2016 David Duckworth of consulting company Saint Barbara notes that "the issue of high-arsenic (high-As) copper concentrates has been highlighted recently with the start-up of a number of new projects producing this material.

As a consequence of sulphide ore processing, arsenic is concentrated along with copper; this becomes more acute as the in-situ grade increases. The largest copper supply …

For more efficient treatment of arsenic-bearing copper concentrates, arsenic can be extracted in two steps: high-temperature filtration of dust and low-temperature separation of condensed arsenic oxide. The oxygen content in the roasting environment has an important effect on the residual arsenic content in the concentrate.

Arsenic, antimony, bismuth and other elements with potentials similar to that of copper are harmful impurities in the copper electrolytic refining process and may precipitate in the cathode discharge when the concentration of Cu 2+ in the electrolyte is low or when the current density is high, thereby reducing the copper cathode purity [5], …