Various pyrometallurgical methods for treating copper concentrates that contain appreciable arsenic are reviewed. Various aspects of the engineering of these treatment methods are discussed. The methods discussed include: complete oxidation with …

@article{Zhang2021SeparationOA, title={Separation of arsenic and extraction of zinc and copper from high-arsenic copper smelting dusts by alkali leaching followed by sulfuric acid leaching}, author={Yuhui Zhang and Xiao-Min Feng and Long Qian and Jinhua Luan and Bingjie Jin}, journal={Journal of environmental chemical engineering}, …

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, …

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 …

@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 …

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 …

Sulfuric Acid Leaching of High-Arsenic Dust from Copper Smelting. In connection with the deterioration in the quality of the concentrates that are now being produced and the use of recycled raw materials, lead, zinc, and arsenic are circulating in the semifinished products obtained during copper production and usually accumulate in …

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 ...

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 …

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.

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.

zinc and copper can be reduced by carbon to produce As 2O 3 when the temperature is> 400 C. According to reaction 2,As 2O 5 can be reduced to As 2O 3 by carbon at> 0 C. Therefore, it is appropriate to choose 400 C for research under carbon solely. To accelerate arsenic removal from high-arsenic-containing copper smelting ash, sulfurization roast-

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.

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 ...

Arsenic is used in glassmaking, and to harden metal alloys in car batteries (including those in electric cars), ammunition, solders, and bearings. Arsenic trioxide is obtained as a byproduct from dusts and residues produced during the treatment of other metal ores such as gold and 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).

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 …

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).

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 …

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 ...

Inorganic arsenic is found in industry, in copper chromated arsenate treated lumber, and in private well water in some parts of the country. Organic arsenic is found in many foods and particularly in some shellfish. The organic forms and amounts of arsenic found in seafood are generally considered to be nontoxic.

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 …

A synergistic combination of chloride and copper powder was proposed as a new method to reductively remove arsenic from highly-acidic wastewater with high arsenic content (HAWA). As(III) was reduced to As(0) by copper powder in the presence of chloride and were effectively removed from HAWA. The pro …

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

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].

An oxygen-enriched bottom-blown smelting process has been proposed to ex-tract 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.

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 …

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 ...

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 …

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 …