The collecting performance and interaction mechanism …

2021-3-17 · collectors. Therefore, copper–sulfur and lead–zinc sep-aration could be realized at neutral or weak alkaline pulp. 2. Flotation Experimental 2.1. Reagents and minerals Hand-picked chalcopyrite and pyrite were obtained from Tonglushan Copper Mine of Hubei Province and Yunfu Mine of Guangdong Province, China, respectively. Galena and spha-lerite

Redox potential control during flotation of a sulphide ...

2017-8-15 · The critical role of dissolved oxygen on the flotation of sulphides has been widely reported (e.g. Buckley and Woods, 1997).The oxygen may also undergo reduction according to reaction . (4) O 2 + 2 H 2 O + 4 e-↔ 4 OH- Given the role of pH already alluded to it is clear that redox potential, which is a function of pH and DO, is a key indicator of the condition of a pulp with respect to its ...

(PDF) Acid leaching of oxide-sulfide copper ore prior the ...

The effect of sodium butyl xanthate (NaBX) and dodecylamine (DDA) as combined collector on the sulphidizing flotation of copper oxide was investigated by flotation test, fluorescent pyrene probe ...

sodium hydrogen sulphide sodium hydrosulphide, sodium ...

Sodium Hydrosulphide Sodium Hydrogen Sulphide Molecular formula: NaHS CAS No. 240-778-0 Sodium Hydrogen Sulphide Molecular formula: NaHS H.S. :16721-80-5 Properties:Colorless needle-like crystal,easy to be deliquesced,it will decomposed and release hydrogen disulfide at its melting point,soluble in water and alcohols,its water solution is strongly alkaline,it will generate hydrogen …

Sodium Hydrosulfide

Sodium hydrosulfide is used more as a common commercial form than sodium sulfide. It is prepared by absorption of hydrogen sulfide in sodium hydroxide. It is shipped as a 45% solution with a specific gravity of 1.303 and a pH of 10.4. The viscosity is 7 centipoise. …

Flotation of mixed copper oxide and sulphide minerals …

2009-3-1 · The sulphidisation reagent, sodium hydrogen sulphide (NaHS) was sourced from Acros Organics. The frother was added to the pulp as received and PAX, AM28 and NaHS were made up fresh each day as 1%, 5% and 5% w/w solutions, respectively. ... It can be seen in Fig. 11 that the addition of NaHS has suppressed the flotation of copper sulphide minerals.

The role of sodium sulfide in the flotation of pyrite ...

In copper-gold flotation plants, pyrite which is depressed in copper flotation is often floated subsequently with the addition of sodium sulfide (Na 2 S) to recover the associated gold. For the first time, this study investigated the role of Na 2 S responsible for the flotation of pyrite depressed in chalcopyrite flotation through flotation tests and Cyro-XPS (X-ray photoelectron spectroscopy ...

The Effect of Oxidation on the Flotation Behaviour of ...

2016-6-14 · flotation selectivity and recovery in the processing of complex sulphide ores. It is an inherent part of surface chemical reactions that determine whether the surface fJ.1m formed on a sulphide mineral will act as a hydrophobic or hydrophilic one. Because ofthe highly complex surface

Biogenic Sulphide Reagent in Hydrometallurgy

replacement of sodium hydrosulphide for use in the separation of copper and molybdenum in flotation. Biogenic sulphide, produced on demand at site, offers significant cost savings and provides the additional benefit of improved safety due to the elimination of the transportation, handling and storage required for chemical sulphide reagents.

Flotation of sulphide minerals

1. A process for flotation of a sulphide mineral containing nickel, said process comprising the steps of: separating a flotation pulp containing valuable sulphide minerals into at least a coarse stream and a fine stream, said size separation being effected at a relatively coarse level in the range of 20 to 50 microns; treating predominantly the coarse stream with acid and/or copper sulphate to ...

Mining Flotation Use Sodium Hydrosulphide 70% Flakes …

Mining Flotation Use Sodium Hydrosulphide 70% Flakes Nahs, Find Complete Details about Mining Flotation Use Sodium Hydrosulphide 70% Flakes Nahs,Sodium Hydrosulphide,Nahs,Sodium Hydrosulphide 70% Flakes from Sulfide Supplier or Manufacturer-Humate (Tianjin) International Limited

(PDF) A Review of the Flotation of Copper Minerals

Sulphide ores are the major sources of base metals like Copper, Lead, Zinc, Nickel and Cobalt. Beneficiation of. these base metal sulphide minerals is predominantl y through the froth flotation ...

Copper Flotation

2016-5-16 · Copper Flotation Process Summary. Flotation of Copper Ores. Although basic porphyry copper flotation and metallurgy has remained virtually the same for many years, the processing equipment as well as design of the mills has continually been …

Review, Evolution and Optimization of the Kansanshi …

2016-6-8 · The traditional method applied for the flotation of copper oxide or mixed ores is sulphidisation, which was first developed with industrial success on Pb–Zn oxide ores in Australia (Crozier, 1991). The method involves multistage addition of sodium sulphide (Na 2 S), sodium hydrogen sulphide (NaHS), or ammonium sulphide (NH 4) 2

Flotation using NaHS Sodium Hydrosulfide

2021-9-14 · Froth Flotation (Sulphide & Oxide) ... Flotation using NaHS Sodium Hydrosulfide (1 reply) M. ... just now we introduce NaSH replacing copper at flotation other reagent in place froth, promoter, PAX. What will be the best recommended dosing rate for the NaSH for such density at 27 to 29%.

Enhanced sulfidation xanthate flotation of malachite using ...

2017-5-18 · Copper is the most prevalent and valuable metals used in the industry. Owing to its high conductivity, copper is used mostly in the electrical and electronics industries 1,2,3,4 nature, copper ...

v116n6a11 Review, evolution, and optimization of the ...

2016-7-19 · addition of sodium sulphide (Na 2S), sodium hydrogen sulphide (NaHS), or ammonium sulphide (NH 4) 2S as a sulphidizing agent, together with xanthate collectors such as potassium amyl xanthate (PAX) (Kongolo et al., 2003; Mwema and Mpoyo, 2001). The effectiveness of sulphidization for flotation of oxidized sulphides has also

Application of D-optimal design for optimizing copper ...

2015-11-11 · Keywords: copper, molybdenum, flotation, chemical reagents, D-optimal, optimization Introduction Although it seems that porphyry copper deposits are relatively simple, the geology of porphyry copper ores is almost complex and varies significantly within the ore body. Many copper sulphide ore deposits occur with molybdenum, mainly related to pyrite

Flotation of mixed copper oxide and sulphide minerals …

In conjunction with Ausmelt Chemicals, Minto is currently investigating options to recover copper oxide and sulphide minerals using flotation by blending their primary sulphide ore with oxide ores. The blend used in this laboratory scale investigation was 70% sulphide ore and 30% oxide ore on a weight basis.

Brief Introduction of Dithiophosphate

2019-4-24 · It is an effective collector for copper, lead and silver sulfide ore and activated zinc sulfide ore. It is commonly used in the priority flotation separation of lead ore and zinc ore. In the alkaline medium, the dithiophosphate 25 has weak collecting effect to pyrite and other sulfide …

Flotation of Nickel-Copper Sulphide Ore: Optimisation of ...

2020-1-8 · the flotation recovery of Ni, Cu and Co from a nickel-copper sulphide ore. The effect on flotation performance of various parameters such as pH, collector dosage, % solids and depressant dosage at different levels was investigated. Therefore, the main objective of the study was to optimize the process parameters for the flotation of base metals ...

Flotation of mixed copper oxide and sulphide minerals …

The copper sulphides present in the blend were bornite and chalcopyrite, while the oxides were malachite and minor azurite om previous flotation investigations of mixed copper oxide and sulphide ...

Role of sodium sulfide in the flotation of oxidized copper ...

1986-8-1 · This paper reviews uses of sodium sulfide in the flotation of oxide minerals of copper, lead, and zinc. The activation and depression effects of sodium sulfide are of particular importance because of their applications with oxidized lead and copper ores. In spite of its industrial importance, the nature of the heterogeneous reactions between sulfide ions in solution and the surface of oxidized ...

Brief Introduction of Dithiophosphate | CNFREE

2019-4-24 · It is an effective collector for copper, lead and silver sulfide ore and activated zinc sulfide ore. It is commonly used in the priority flotation separation of lead ore and zinc ore. In the alkaline medium, the dithiophosphate 25 has weak collecting effect to pyrite and other sulfide …

Estimation and Improvement of Recovery of Low Grade …

Copper oxide ore is an important copper ore resource. For a certain copper oxide ore in Yunnan, China, experiments have been conducted on the grinding fineness, collector dosage, sodium sulfide dosage, inhibitor dosage, and activator dosage. The results showed that, by controlling the above conditions, better sulfide flotation indices of copper oxide ore are obtained.

Synthesis of sodium polysulphide for copper ore …

2018-6-5 · Based on the data on the approbation of sodium polysulfide in flotation experiments, as well as graphical data, a correlation analysis was performed that showed the best ratio of polysulphide components that would allow higher copper recovery and higher selectivity.

Flotation Collectors

2015-8-10 · Another aerofloat derivative, sodium di-ethyl-di-thio-phosphate (American Cyanamid Company''s Reagent " 208 "), is to a certain extent replacing sodium aerofloat in the flotation of sulphide copper minerals, its mode of addition in conjunction with …

Flotation Behavior of Iranian Oxidized Zinc Ore Using ...

2015-4-1 · The parameters of the flotation process such as recovery, grade and the effect of using some collectors (sodium sulphide and copper sulphate at different pH) were investigated. According to this investigation, the maximum flotation recovery was found to be 84.5% with 24.5% zinc content using the cationic collector DDA at pH 11.5.

Enhancing flotation separation of chalcopyrite and ...

2021-3-18 · Results of copper sulphide ore beneficiation test. The flotation results of copper sulfide ore are shown in Table 7. At pH 9.2, PAAS and GA were used as combined depressant and PBX as collector to ...

Electrochemistry of Flotation of Sulphide Minerals ...

The sodium sulphide-induced collectorless flotation of several minerals are first introduced in this chapter. The results obtained are that sodium sulphide-induced collectorless flotation of ...

Review, Evolution and Optimization of the Kansanshi Mixed ...

Redox potential control during flotation of a sulphide ...