The presence of arsenic in zinc sulfide concentrates is particularly harmful, because it creates problems in zinc electrolysis. The main source of arsenic in non-ferrous metallurgy is...
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The presence of arsenic in zinc sulphide concentrates is particularly
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The mineral composition of the ore concentrate was as follows:
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The sulfide concentrate used in this study was characterized by a high content of As (19.1 wt%), as well as the presence of Zn, which also contributed to the toxic effect on the bacterial cells. During biooxidation of the sulfide ore concentrate, ferrous iron, arsenic, and zinc were gradually released from the solids into the medium (Table 1).
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Insoluble zincferrite, formed during concentrate roasting by the reaction of iron with zinc, and lead and silverremain in the leach residue. Lead and silver are typically shipped to a lead smelter for recovery,while the zinc is extracted on-site from the zinc ferrite to increase recovery efficiency.
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Tank bioleaching of substandard arsenic-bearing sulfide copper–zinc concentrate, containing 1.70, 6.22, and 7.30% of arsenic, copper, and zinc, was performed. The concentrate...
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ISO 13547-2:2014 specifies an acid digestion and inductively coupled plasma atomic emission spectrometric (ICP-AES) method for the determination of the mass fraction of arsenic in copper, lead, zinc, and nickel sulfide concentrates as follows: for copper sulfide concentrates, the method is applicable to the determination of mass
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In the present work the effect of alkaline sulfide leaching (ASL) on the extraction of copper and zinc from low-grade copper concentrate containing chalcopyrite, tennantite, sphalerite, and pyrite during batch and continuous bioleaching experiments was studied. It was demonstrated that ASL and further bioleaching may be a promising
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ISO 13547-1:2014 specifies an iron hydroxide concentration and inductively coupled plasma atomic emission spectrometric (ICP-AES) method for the determination of the mass fraction of arsenic in copper, lead, zinc, and nickel sulfide concentrates as follows: for copper sulfide concentrates, the method is applicable to the determination of mass
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In addition, nearly all of the arsenic and cadmium contained in zinc sulfide concentrate were extracted into resultant crude lead. (A chemical composition analysis of the resultant crude lead showed that the crude lead contained 98.25% Pb, 0.18% Zn, 1.04% As, 0.4% Cd, and 6417 g t −1 Ag.)
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The goal of this work was to study the bioleaching of arsenic-containing polymetallic concentrate that contained 6.2% Cu, 7.3% Zn and 1.7% As, depending on different temperatures and in the presence of CO2 and molasses in the medium, as well as the difference in the composition of microbial population formed under various conditions. A
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Especially, it was found to be effective to separate some associated impurities from zinc sulfide concentrate, such as arsenic, cadmium, fluorine, and chlorine etc. No full-text available...
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The distribution of antimony in sulfide copper-zinc concentrates processing products manufactured according to a production scheme including autogenous smelting, matte conversion to blister copper, and flotation extraction of metals from slags, is evaluated. The main products concentrating antimony concern autogenous smelting and
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Arsenic is a toxic and volatile element that has little commercial use. This is causing some concern to copper smelters as they are obliged to dispose of arsenic materials produced as a by-product to the smelting process in accordance with ever tightening environmental guidelines.
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c) for zinc sulfide concentrates, the method is applicable to the determination of mass fractions of arsenic from 0,05 % to 0,6 %; d) for nickel sulfide concentrates, the method is applicable to the determination of mass fraction of arsenic from 0,05 % to 1,0 %. 2 Normative references
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Difficulty processing nickel concentrates high in arsenic (As) and magnesia (MgO), which can render many concentrates, particularly those produced from disseminated sulfide ores and talc-carbonate ores, unsuitable if they cannot be blended with higher quality concentrates to reduce the concentration of the deleterious species,
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sulfide minerals into the oxide ones in terms of comprehending the optimum condition of ZnS pretreatment for making zincite (ZnO) through the pyro-hydrometallurgy process. Many sulfide minerals contain other components such as arsenic that isreleased into the environment when roasted. Roasting helps to concentrate the zinc by
Read Morec) for zinc sulfide concentrates, the method is applicable to the determination of mass fractions of arsenic from 0,05 % to 0,6 %; d) for nickel sulfide concentrates, the method is applicable to the determination of mass fraction of arsenic from 0,05 % to 1,0 %. 2 Normative references
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S solutions is successfully applied to remove arsenic from minerals such as enargite and convert it to a liquid phase to obtain concentrate without arsenic, which may be processed using pyrometallurgical approaches [4,9–14].
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The mineral composition of the ore concentrate was as follows: FeS2(48 wt%), FeAsS (35 wt%), ZnS, CuFeS2, PbS, Au (135.2 g/t), and Ag (160 g/t). The contents of sulfidic sulfur (SS) and sulfidic arsenic (AsS) in the ore concentrate were 28.1 and 16 wt%, respectively. Table 1shows the chemical composition of the ore concentrate.
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The mineral composition of the ore concentrate was as follows: FeS 2 (48 wt%), FeAsS (35 wt%), ZnS, CuFeS 2, PbS, Au (135.2 g/t), and Ag (160 g/t). The contents of sulfidic sulfur (S S) and sulfidic
Read MoreIn the present work the effect of alkaline sulfide leaching (ASL) on the extraction of copper and zinc from low-grade copper concentrate containing chalcopyrite, tennantite, sphalerite, and pyrite during batch and continuous bioleaching experiments was studied. It was demonstrated that ASL and further bioleaching may be a promising
Read MoreISO 13547-2:2014 specifies an acid digestion and inductively coupled plasma atomic emission spectrometric (ICP-AES) method for the determination of the mass fraction of arsenic in copper, lead, zinc, and nickel sulfide concentrates as follows: for copper sulfide concentrates, the method is applicable to the determination of mass
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ISO 13547-1:2014 Copper, lead, zinc and nickel sulfide concentrates — Determination of arsenic — Part 1: Iron hydroxide concentration and inductively coupled plasma atomic emission spectrometric method This standard was last reviewed and confirmed in 2020. Therefore this version remains current.
Read MoreThe goal of this work was to study the bioleaching of arsenic-containing polymetallic concentrate that contained 6.2% Cu, 7.3% Zn and 1.7% As, depending on different temperatures and in the presence of CO2 and molasses in the medium, as well as the difference in the composition of microbial population formed under various conditions. A
Read Moresulfide minerals into the oxide ones in terms of comprehending the optimum condition of ZnS pretreatment for making zincite (ZnO) through the pyro-hydrometallurgy process. Many sulfide minerals contain other components such as arsenic that isreleased into the environment when roasted. Roasting helps to concentrate the zinc by
Read MoreEspecially, it was found to be effective to separate some associated impurities from zinc sulfide concentrate, such as arsenic, cadmium, fluorine, and chlorine etc. No full-text available...
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Bioleaching may be effectively used to extract nonferrous metals from sulfide ores and concentrates. At the same time, some minerals are refractory and their bioleaching rate is often comparatively low that does not allow the required metal extraction rate to be achieved. In the present work, we studied the two-stage process, which
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ISO 13547-1:2014 specifies an iron hydroxide concentration and inductively coupled plasma atomic emission spectrometric (ICP-AES) method for the determination of the mass fraction of arsenic in copper, lead, zinc, and nickel sulfide concentrates as follows: for copper sulfide concentrates, the method is applicable to
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The goal of the present work was to evaluate the possibility to improve bioleaching of Cu-Zn concentrate containing tennantite by means of using alkaline sulfide leaching (ASL). Concentrate contained 18.1% Cu, 6.2% Zn, and 1.7% As. ASL allows removing arsenic by means of destruction tennantite (Cu 12 A s4 S 13) that results in
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A feed of matte and sulfide concentrate containing approximately 0.4% cobalt and 30% sulfur is pressure leached at elevated temperature and pressure in an ammoniacal solution to produce a solution of nickel, copper and cobalt. By boiling away the ammonia; copper is precipitated as a sulfide and sent to a smelter.
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