Selective flotation of enargite from copper sulphides in …
Recent research has demonstrated promising results showing the possibility of separating arsenic-copper sulphides from other copper minerals by controlling the potential of the flotation pulp. ... or redox agents to selectivity change the surface of the minerals and control the electrochemical conditions of the flotation pulp have been studied ...
Selective Flotation of Copper Concentrates Containing Arsenic …
A combination treatment using 0.1 M H2O2 and 60 g/t of KAX at pH 9 enhanced the separation selectivity in the selective flotation of copper sulfide and arsenic-bearing copper minerals by producing ...
(PDF) Oxidation-reduction effects in the flotation …
Oxidation-reduction effects in the flotation of copper sulfide minerals and molybdenite – A proof of concept at industrial scale ... and also the presence of minerals containing harmful elements such as arsenic in copper concentrate. …
Flotation separation mechanism for secondary copper …
Ryaboy and Shepeta's (2021) investigated the flotation of copper-arsenic ores and highlighted the selectivity of a dialkyl dithiophosphate-type collector in enhancing the recovery of copper, gold ...
The application of selective flotation to obtain a high-arsenic …
In light of recent advances on the selective flotation of enargite and tennantite, the importance of redox conditions to control the flotation/depression of enargite-tennantite from …
Methods of arsenic wastes recycling: Focus on flotation
For instance, the flotation separation of copper sulfides from arsenic minerals at Rosebery copper concentrator, Australia, has been recently published [73]. The selective depression of pyrite from chalcopyrite and arsenopyrite by biomodulation (using Acidithiobacillus ferrooxidans, under natural conditions) was also discussed [74].
Optimisation of gold recovery by selective gold flotation for copper
The results of two-step rough flotation carried out while varying the concentration of a combination of Aeroflot 208 and Aerophine 3418A collectors at the constant pH of 4 -4.5, showed that the ...
The separation of arsenic from copper in a Northparkes copper…
Using a composite sample of high-arsenic drill cores from Northparkes it was possible to selectively separate tennantite from chalcopyrite (CuFeS 2) and bornite (Cu 5 FeS 4) using controlled-potential flotation.The separation was made on a bulk copper–arsenic concentrate after reducing the pulp potential to about − 150 mV SHE at pH 12 and floating the …
(PDF) Arsenic pathways in copper mining, sustainability …
This study seeks to investigate selective separation of copper-arsenic minerals from a copper sulphide ore in a batch flotation system under controlled pulp potential.
Selective Removal of Arsenic from Copper …
Selective Removal of Arsenic from Copper Concentrates Aim To explore and develop improved electrochemically-controlled flotation techniques to separate arsenic bearing copper sulphides from copper and iron bearing sulphides in …
Selective Flotation of Copper Concentrates Containing …
2 and 60g/t of KAX at pH 9 enhanced the separation selectivity in the selective flotation of copper sulfide and arsenic-bearing copper minerals by producing a copper concentrate with the lowest arsenic grade and highest copper grade in tailings compared to those obtained from
Selective Leaching of Arsenic from Copper Concentrates in …
The selective leaching of arsenic using sodium hypochlorite was evaluated in order to reduce its concentration in a copper concentrate. The best conditions achieved in the synthetic concentrate were applied to the industrial concentrate. First, the individual behaviors of pure samples of enargite and chalcopyrite were evaluated under a hypochlorite medium. The …
Alkaline sulphide leaching of tennantite in copper flotation
High-arsenic copper flotation concentrates, in which the major arsenic-bearing mineral was tennantite, were leached with an alkaline sulphide system. ... 1.1, and 0.2 wt%, respectively, meaning excellent selectivity for arsenic was achieved. X-ray diffraction and electron probe microanalyses indicated the mechanism for arsenic dissolution from ...
Alkaline sulphide leaching of tennantite in copper flotation
High-arsenic copper flotation concentrates, in which the major arsenic-bearing mineral was tennantite, were leached with an alkaline sulphide system. ... 1.1, and 0.2 wt%, respectively, meaning ...
An Efficient Peptide Screening Method for Mineral …
In mineral processing, arsenic-bearing minerals are particularly difficult to separate from their non-arsenic counterparts because they possess similar surface properties. Peptides are well known for their target specificity …
OPTIONS FOR REMOVING ARSENIC AND TALC FROM A …
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 …
Tennantite and Enargite Rejection in the Copper Flotation…
In some copper flotation circuits, Arsenic deportment in the concentrate is undesirable as it often leads to hefty smelter penalties [1] [2] [3] . Moreover, the copper concentrate with containing higher than 0.5% as usually cause the rejection from concentrate recipient country's Customs [4] . ... The poor liberation of copper-Arsenic ...
Control of Non-Ferrous Metal-Sulfide Minerals' …
A value greater than one designates the selectivity of copper over arsenic. As can be seen from Table 3, for all ores studied, no selectivity between copper and arsenic minerals was achieved by conventional flotation. A …
A Review of the Flotation of Copper Minerals
The Chelopech epithermal arsenic bearing high-sulphidation, copper-gold deposit located in Bulgaria is often considered as the richest European gold deposit. ... The investigation showed that sodium hydrosulphide exhibited a good …
Discussion on arsenic removal in arsenic-containing copper …
Therefore, using conventional flotation agent and process flotation of arsenic-containing sulfide copper ore, arsenopyrite is easily selected into copper concentrate, so that …
Collector for Copper-Arsenic Ore Flotation
Applying BTF-15221 collector allowed, as compared to the standard IMA-I413p reagent, to increase recovery of copper, gold, and silver and reduce arsenic content in the copper concentrate. The higher selectivity of BTF-15221 as compared to IMA-I413p was confirmed by the fact that the bulk of the increase in copper recovery and decrease in the ...
The selective flotation of enargite from other copper …
Although the flotation process shows various advantages compared to that of pyrometallurgical and hydrometallurgical processes, selective flotation of arsenic-bearing copper and copper sulfide ...
Separation of enargite and tennantite from non-arsenic copper …
It was found that controlled pulp potential (Eh) flotation is a prospective approach to promote the separation of arsenic-copper minerals from other copper sulphides due to the strong Eh ...
Economic potential and environmental impact of metal …
The occurrence of arsenic and copper in FSF slag correlate the key phases of arsenic copper alloys, accounted for 88.91% of total arsenic-bearing phases and 32.28% of copper-bearing phases.
Flotation separation of copper sulphides from arsenic …
The arsenic content of Rosebery copper flotation feed is mainly present as arsenopyrite (FeAsS), containing approximately 46.0% arsenic with the remainder of the arsenic in copper sulphosalts (tennantite (Cu 12 As 4 S 13)), in a solid solution series with tetrahedrite (Cu 12 Sb 4 S 13).Tennantite contains approximately 20.3% arsenic. Characterisation of the …
Selective flotation of enargite from copper sulphides in …
It was found that controlled pulp potential (Eh) flotation is a prospective approach to promote the separation of arsenic-copper minerals from other copper sulphides due to the strong Eh dependence of arsenic minerals flotation (Menacho et al., 1993, Yen and Tajadod, 2000, Kantar, 2002, Guo and Yen, 2005, Senior et al., 2006, Bruckard et al ...
Arsenic in complex orebodies
A treatment methodology (FIG 1) to improve the selectivity of enargite from a complex ore and reduce the arsenic in the tailings was proposed by (Tayebi-Khorami et al., 2017b). This methodology involved: ... A bulk copper-arsenic flotation stage at air set potential to produce a high arsenic-high copper concentrate.
Application of macromolecular organic polymer S-7261A in arsenic …
The common copper-arsenic bearing minerals in copper ores, enargite (Cu3AsS4) and tennantite (Cu12As4S13). contain significant amounts of copper: 48.4% and 51.6% respectively.
Selectively improves chalcopyrite hydrophobicity to achieve copper …
Arsenic (As) is a harmful element that severely threatens the atmosphere, water, and soil [1], [2]. As element mainly occurs in natural minerals, such as arsenopyrite, enargite, realgar, and orpiment [3], [4], [5]. Due to the increasing demand for copper metal, copper ores become increasingly poor and complex.
A review of copper–arsenic mineral removal from copper …
The Australian CSIRO has developed a flowsheet that combines selective flotation, roasting and safe disposal of arsenic bearing residues. Small scale flotation, roasting and …