metal ions sulphide flotation

The sulfide ions interact with copper ions to form a stable metal sulfide with stable covalent bonding, which improves the stability of the xanthate adsorption layer and plays a role in catalytic sulfidization to strengthen the complex. ... In flotation of copper oxide minerals, the use of specific metal ions as flotation activators shows ...

Thus, some reports emphasize the adverse effects on froth flotation of mineral sulfides by the presence of ions like Ca 2+, Mg 2+, and SO 4 2− [4][5][6] [7], which are naturally present in ...

Furthermore, the crystal field stabilization energy resulting from the interaction between reagents and surface metal ions can influence the stability of …

Flotation methods include direct flotation (using chelating reagents or a fatty acid as collector), sulfidization flotation (using xanthate as collector), and activation …

The usual pH of galena flotation in practice is 10.5 and at this pH the hydrolysis of calcium ions also forms calcium hydroxyl species (CaOH +) and these species are established to be more susceptible to adsorption in oxide and silicate minerals (Miller et al., 2007) which is thought to be possible also for sulphide minerals. Overall, the ...

Contact angle testing is the most intuitive test for determining the hydrophobicity of a mineral surface [22], [23].The effect of copper ions on mineral hydrophobicity was assessed by performing a contact angle test at copper ion concentrations of 2.5×10 −4 and 1×10 −3 mol/L, and the concentrations of sodium …

For the flotation of sulfide minerals, the interactions of flotation reagents with metal ions on mineral surfaces play a decisive role. Chen, 2021, Chen et al., 2021 suggested that the interaction of reagent molecules with the metal cations in mineral surfaces was heterocoordination, since the metal ions in mineral surfaces had been ...

The ion exchange mechanism for metal removals can be explained in the following reaction as the ion exchange particle having ion exchanger of M − EC + (M − is the fixed anion and EC + is the ...

Biçak et al. (2012) concluded that dissolved metal ions and sulfide ions mainly in the form of SO 4 2− and S 2 O 3 2− alter the surface chemistry of minerals in the pulp phase. Ikumapayi et ...

The process of material being recovered by flotation from the pulp comprises three mechanisms: (1) Selective attachment to air bubbles (or "true flotation"). (2) …

We conducted a 2⁴ factorial design on the main parameters that influence flotation performance. The results showed an optimum flotation condition at dosages of 80 g/t, 30g/t, and 150 g/t of ...

Water quality affects the flotation recovery of minerals and their separation. Mining-process waters become saturated with soluble salts after contact with minerals (oxidation and dissolution) during crushing, classification and flotation. Inorganic species, such as metal ions but also carbonate and sulphate ions, may have a positive or negative effect on …

Inorganic species, such as metal ions but also carbonate and sulphate ions, may have a positive or negative effect on mineral flotation. As sulphate ions are always found in high concentrations in ...

Andrea R. Gerson. Much attention has been paid to the flotation of chalcopyrite using saline seawater. However, the influence of salt ions on mineral flotation is complex, and different salts may ...

Sulfide precipitation is also an effective process with which to remove heavy metal ions as the solubilities of metal sulfide precipitaties are far lower than those of hydroxide precipitation, and the sulfide precipitation process can achieve a high degree of metal removal over a broad pH range compared with hydroxide precipitation . However ...

Abstract. Ion flotation is an efficient method to remove or recovery of heavy metals, rare and precious metal ions, and organic pollutants from aqueous solution. The added surfactants served as collectors and frother mainly dominate the indexes of ion flotation. Therefore, the review summarized the surfactants (chemical synthetic …

Inorganic species, such as metal ions but also carbonate and sulphate ions, may have a positive or negative effect on mineral flotation. As sulphate ions are always found in high concentrations in process waters, their effects on the flotation of copper, molybdenum and zinc sulphides were investigated in single minerals and ores …

The researches on flotation mechanism mainly focus on the interaction between ions and minerals in the pulp and the adsorption behavior between the metal ions and the minerals [12–14]. Wei et al. studied the influence of metal ions (such as Ca 2+, Mg 2+, Fe 2+, Fe 3+, Cu 2+, Zn 2+, and Al 3+ ) in the pulp on the chalcopyrite and galena …

Numerous studies have shown that Mg 2+ and Ca 2+ ions adversely affect the flotation of metal sulfide minerals. Castro et al. [36] discovered that chalcopyrite exhibited good floatability in seawater within the range of pH 8.0–9.5. However, when pH exceeded 10.0, its flotation recovery would drop sharply.

Flotation occurs at the solid-liquid-gas three phase boundary, first of which is the interaction between the flotation agent and minerals in the pulp. Therefore, the flotation system is based on inorganic chemistry, organic chemistry, analytical chemistry, and surface chemistry. Early flotation researchers used this basic chemical knowledge …

The H 2 O 2 is a strong depressant for pyrite (Hu, et al., 2009) and a decrease in its amount may decrease selectivity between metal sulphides and ferrous sulphide in flotation. Fig. 4 a shows that the addition of dextrin (test F7) during grinding has produced more Cu and Pb grade and recovery than when it added after grinding …

This paper aims to review and summarize briefly the studies on relations between pulp Eh values and optimal flotation results, as well as on the application of …

An anion exchange reaction selectively reacts a metal (M) from a compound mixture containing M–X to target the formation of a new compound M–Y. The compound …

Flotation is affected about one pH unit lower if CaO is used for raising pH compared with KOH or K2CO3. The pzc for pyrite is at pH = 6.9. Above pH 6.9 the surface of the pyrite is negatively charged and Ca2+ adsorbs readily by electrostatic attraction and this hinders the oxidation reaction on the pyrite surface. 2.

1. Introduction1.1.. ContextIn the practice of sulphide ore milling and flotation, the loss of paymetal(s) to flotation tailings is the largest loss of all unit processes in the flowsheet by which saleable metal is produced (Cramer, 2001).These losses can arise from various sources, ranging from inadequate process conditions to circuit and operational …

Introduction. Flotation is a great invention in the utilization of mineral resources. However, it was not until 1925 when xanthate could be used as a high-efficiency collector for sulphide ore (Keller et al., 1925) that mankind began to utilize mineral resources on a large scale, especially complex ores and low-grade polymetallic mineral …

The flotation engineer, who is the intended audience for this work, also has concerns - metal ions are suspected of playing a significant role in controlling sulphide mineral selectivity [9,10,16]. The work here has considered not only species in solution but also on the mineral surface which is more relevant to flotation studies.

Key words: metal ions; flotation; oxide mineral; silicate mineral; sulfide mineral 1 Introduction Flotation is a versatile method extensively used in mineral processing fields to separate valuable minerals from gangue minerals selectively, which …

Keywords ÖHeavy metal ions, Sulfide precipitation-flotation, Wastewaters, Recycle. Abstract The wastewater containing Hg2+ and Pb2+ does great harm to the environment and human bodies. ... Ion flotation can be easily influenced by other ions in wastewater and need much more collector [8]. Colloid flotation involves the removal of metal

Ion flotation is a separation technique for removing or recovering metal ions from dilute aqueous solutions [ 6, 7, 8, 9, 10, 11, 12 ]. In this technique, …

Activation of sulphides by heavy metal ions is discussed. A brief analysis of modern ideas on mechanism of activation of sphalerite, pyrite and galena by copper sulfate and lead nitrate is given. It is shown that the current technology insufficiently conforms to the experimental and practical data on activation of minerals. A new mechanism to …

If these compounds could form complexes with metal ions in flotation, they would be a new type of high-efficiency collector for the retrieval of minerals, and their associated noble metal will be intensified. ... C.I. Basilio, Fundamental studies of thionocarbamate interactions with sulfide minerals [D] (ia Polytechnic Institute and …

This paper reviews: lime preparation factors that influence the reagent performance properties; mechanisms of lime interaction with collector chemicals and …

The activation of sulphide minerals with Cu2+ and other cations induces collectorless flotation, i.e. the minerals become hydrophobic and can be floated without the addition of a conventional collecting reagent. Since the effect was first described (Stewart and Finkelstein, 1973) it has been widely studied.

The effect of water chemistry on froth stability and surface chemistry of the flotation of a Cuâˆ'Zn sulfide ore [J]. International Journal of Mineral Processing, 2012, 102âˆ'103: 32âˆ'37. [4] BULUT G, YENIAL Ãœ. Effects of major ions in recycled water on sulfide minerals flotation [J].

The results of the flotation tests revealed that accumulation of dissolved metal ions and sulfide ions, mainly in the form of SO 4 2− and S 2 O 3 2–, changed both the froth stability and surface chemistry of the sulfide minerals. The froth stability and hence the recovery by entrainment, increased in conjunction with the dissolved ion ...

Metal ions commonly exist in the flotation pulp, which will affect the mineral surface properties and lead to a change in the mineral floatability. In this work, the effect of Fe 2+ on the flotation behavior of smithsonite was investigated, and the interaction mechanism of Fe 2+ with the smithsonite surface in the sulfidization flotation system ...

The Batu Hijau Concentrator uses sea water for processing a gold-rich phorphyry copper ore (chalcopyrite-bornite) (Castro, 2012), while CBI processes a complex Cu–Zn sulphide ore using dissolved metal ions and sulphide ions, mainly in the form of SO 4 2 − and S 2 O 3 2 − (Bıçak et al., 2012).