Sulphidising flotation of oxide copper–cobalt ores with sodium hydrosulphide used as sulphidising agent is common practice in Katanga, Democratic Republic of Congo. From laboratory investigations, sodium hydrosulphide proved to enhance flotation selectivity of copper and cobalt towards the gangue minerals, while …

The flotation behaviours of malachite and heterogenite were studied through many roughing and cleaning flotation tests in order to recovery most of copper and cobalt.

The use of the Arrhenius equation gives the values of the activation energy of 10.92, 18.83 and 25.25 kJ/mol respectively for copper, cobalt, and iron dissolution, for the chemical reaction ...

Large amounts of tailings are produced when copper minerals are concentrated by flotation. For instance, the flotation process is performed with water containing 25–35% wt solid ratio and is consumed 1.9–3 m 3 water per ton of ore processed (Gunson et al., 2012; Li et al., 2019).

The latter, including a sulphide flotation stage at neutral pH, followed by an acidic reverse flotation stage at pH 4.5-5, increased the overall copper and cobalt recoveries.

Bell DT (2012) Flotation of cobalt bearing minerals from a mixed copper-cobalt oxidized ore. Dissertation, University of Johannesburg. Shahcheraghi SH, Abdollahy M, Khalesi MR, Hossein SM (2012) A study on the effect of some operating parameters on the flotation kinetics of copper sulfide minerals.

Ion flotation was used to remove copper(II), lead(II) and chromium(III) from simulated wastewater using a new biodegradable biosurfactants, namely, sodium N-lauroylsarcosinate (LS), and the ...

containing copper–cobalt flotation tailings. Under the optimal conditions, overall recoveries of approximately 64.36% Cu and 60.50% Co were obtained. (3) The proposed flowsheet for treating the high talc-containing copper–cobalt ore included a flotation section and gravity separation section using Knelson concentrators.

NICKEL AND COBALT ORES : FLOTATION. Most of the world's nickel is extracted from the mineral pentlandite, (Ni, Fe)9S8, which frequently occurs in ores containing predominantly pyrrhotite and various non-sulRdes, some of which contain magnesium (Table 1). The nickel content in such sulRde ores is generally low (0.2}3%) and varies …

The process involves two basic flotation methods: (a) fatty acid flotation of oxide copper minerals from siliceous ore, and (b) sulphidization of oxide copper minerals followed by …

Copper slag has long been the subject of metal recovery. However, it has become apparent that copper slag flotation tailings can meet resource requirements under certain circumstances. Besides copper, zinc and …

Roasting of copper converter slag containing 4.03% copper, 1.98% nickel and 0.48% cobalt with ammonium sulphate open to atmosphere has been carried out in order to achieve sulphation of copper ...

Perfect separation of copper and cobalt by flotation is not possible: typical assays of the cobalt content of the copper-rich concentrate range between 0.5 and 0.25% (with copper assays between 28 and 32%), while the cobalt content of the cobalt-rich …

The flotation behaviour of both copper and cobalt is considered because cobalt is recovered as a by-product. 2. Materials and methods2.1. Materials. A 60 kg grab sample representing a typical mixed Cu-Co ore from the oxide to sulphide transition zone was collected in-pit from an active mine site in the Katanga province, DRC. The sample …

The current paper is based on the metallurgical testwork results obtained with cobalt-bearing copper ores from both the Valparaíso and Atacama region in Chile. Best case scenario shows that over ...

Sulphidisation followed by flotation is the preferred beneficiation technique for oxidised copper-cobalt ores. • The integration of CPS systems into the flotation circuits can help minimise reagent overconsumption. • Application of selective flotation can help a concentrator to produce separate oxide and sulphide concentrates.

The present research aims at recovering copper and cobalt through reprocessing of tailings from flotation of oxidised ores of copper and cobalt achieved at the Kambove Concentrator (DRC). It ...

Abstract This research aimed at recovering metals retained in the tailings from the flotation of copper (Cu) and cobalt (Co) ores conducted at the New Concentrator in Kipushi (NCK). Metals retention in the tailings (0.73% Cu and 0.37% Co) increased due to the removal of the gravity separation section from the processing circuit together with …

The authors of [20] investigated on the efficiency of oxide copper-cobalt ores flotation by combination of sulphidisers. Sodium hydrosulphide and ammonium sulphide, were used as sulphidisers to enhance flotation selectivity of copper and cobalt towards the gangue minerals. The investigation showed that sodium hydrosulphide exhibited a good ...

In this study, a hydrometallurgical method for the recovery of copper, cobalt, and zinc from copper slag flotation tailings (SFT) was investigated. SFT contains large amounts of valuable metallic compounds, such as copper, cobalt, and zinc. A representative SFT sample containing 0.50% Cu, 0.148% Co, 3.93% Zn, and 39.50% Fe …

The flotation concentrate was then subjected to bioleaching by acidophilicbacterial strain, Acidithiobacillus ferrooxidans, for the treatment of base metals such as cobalt, nickel and copper. The application of bio-collector reduced the silica and alumina-based impurities, which aided the bio-leaching process to achieve a Cu …

The ancient flotation tailings from Lefke, Cyprus, have a potential for non-ferrous metals such as cobalt and copper from more than 9.5 million tons of reserves containing 0.38% Cu, 0.032% Co, and ...

The present research aims at recovering copper and cobalt through reprocessing of tailings from flotation of oxidised ores of copper and cobalt achieved at the Kambove Concentrator (DRC). It focuses on the determination of the reagents' dosage that enables obtaining the highest recovery of copper (44.80%) and cobalt (88.30%) …

This behaviour can be exploited to achieve copper-cobalt separation (Shungu et al., 1988). Sulphidisation of cobalt oxide minerals followed by flotation using sulfhydryl collectors such as xanthate is the most popular route to treat dolomitic oxide ores (Bulatovic, 2010, Shungu et al., 1988). Sulphidisation consists of the activation of ...

Copper and cobalt (Cu-Co) are strategic metals for the Democratic Republic of Congo (DRC), and nearly 20% of the country's GDP is supported by their exports. ... thionocarbamates, fatty acids, sulphides …

The effect of hydrogen peroxide on the extraction of metals in sulfuric acid solutions using copper smelter flotation tailings was also studied by Yigȋt et al. 58 They reported that a high ...

The various copper-cobalt ores mined by Gecamines, together with typical plant applications and results, are briefly described. Intensive laboratory investigations have been undertaken in recent years to improve the metallurgical performances of the various concentrators. As a result of these tests, it was shown that the flotation of the siliceous …

Influence of iron mass on cobalt and copper flotation efficiency The influence of iron mass on cobalt and copper flotation efficiency was studied by changing the iron mass added to the reaction system, while all other parameters were kept constant ŽpHs 5.5, amount of HMDTCy, n s 2 = 10y4 mol, ionic strength, Ic s 0.02 molrl, 1 ml of NaDDS ...