Sodium Hydrosulfide For Oxide Copper Ores
TECHNICAL GUIDE FOR SOLUTIONS OF SODIUM …
Sodium Hydrosulfide, chemical formula NaHS, is a highly alkaline salt solution with a pH of 11.5 to 12.5. The solution is typically yellow to dark green and has a rotten-egg odor due to the Hydrogen Sulfide (H 2 S). The product strength typically ranges from 20% to 45% by …
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Sodium Hydrosulfide
In copper mining, for example, Sodium Hydrosulfide is widely used to activate oxide mineral species. ... NaHS is an effective means of sulfidizing oxide ores and is used most commonly to separate Copper (Cu) from Molybdenum (Mo). ... Sodium hydrogen sulfide is required for the precipitation of heavy metals in sewage-works.
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US20210039956A1
the ethylenediamine phosphate can inhibit the flotation of the slime, and activate the sulfide ore contained in the slurry, but its activation effect is inferior to the ammonium sulfate, and the improvement in recovery rate is still unsatisfactory. Therefore, there is an urgent need to develop a novel activator for strengthening the sulfidizing flotation of copper oxide ores to overcome …
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Role of sodium sulfide in the flotation of oxidized …
Sodium sulfide is one of the most Widely used alkali metal sulfides in the flotation of copper, lead, and zinc minerals in their oxidized form. The sulfidization process, developed in the US in …
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Novel treatment for mixed copper ores: Leaching ammonia – Precipitation
The processes involve diverse reagents like sodium sulfide (Na 2 S) (Feng et al., 2017, Liu et al., 2019), sodium hydrosulfide (NaSH) (Corin et al., 2017), ... In the past few decades, an intense research effort, especially about flotation processes, for improving copper oxide ore recovery has been carried out. Based on previous studies, the ...
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Role of Sodium Sulfide – Copper Lead & Zinc Ore Flotation
Sodium sulfide is one of the most widely used alkali metal sulfides in the flotation of copper, lead, and zinc minerals in their oxidized form. The sulfidization process, developed in the U.S.A. in 1915-20 for oxide copper minerals flotation, is especially suitable for oxidized lead ores in which the gangue is usually basic.
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Characterization and pore structure analysis of a copper ore …
Treatment of oxide copper ores by reduction and ammoniacal leaching. Trans. Inst. Min. Metall. (1974) E. Martinez Chrysocolla studied by DTA, TGA and infrared spectrophotometry. ... The kinetics of sulfidization of malachite in sodium hydrosulfide and tetrasulfide as the sulfidizing agents was investigated in this study. The sulfidization ...
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A successful operational initiative in copper oxide …
the concentration of copper oxide ores containing carbonate gangue, which has also been utilized for . Physicochem. Probl. Miner. Process., 55(2), 2019, 356-369 357 industrial applications. In these studies, agents such as sodium hydrosulfide (NaHS), ammonium sulfide ((NH 4) 2 S) and sodium sulfide (Na 2
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Sodium hydrosulfide
Sodium sulfide is a chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9 H 2 O.Both the anhydrous and the hydrated salts in pure crystalline form are colorless solids, although technical grades of sodium sulfide are generally yellow to brick red owing to the presence of polysulfides and commonly supplied as a …
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A Flotation Technique for a Sulfide-Oxidized Cu-Co Mixed …
It was also found that using sodium hydrosulfide (NaHS) was more beneficial than using sodium sulfide (Na2S) for the activation of cobalt oxide. ... The copper oxide ore in …
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Copper Depressants
The use of sodium hydrosulfide is easy to produce hydrogen sulfide gas, which will bring danger to production. 2. Cyanide. Sodium cyanide and sodium ferrocyanide are generally used in conjunction with sulfides, which are added to cleaning circuit to depress residual copper minerals. Disadvantage
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Development and optimization of mixed sulphide/oxide …
flotation of copper oxide or mixed ores is sulphidization, which was first developed with industrial success on Pb-Zn oxide ores in Australia (Crozier, 1991). The method involves multistage addition of sodium sulphide (Na2S), sodium hydrosulphide (NaHS), or ammonium sulphide (NH4)2S as a sulphidizing agent, together with xanthate
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Maximizing your performance
effective reagent to separate copper traces from nickel concentrates. Our sulfur products are used as basic building blocks and processing aids for mining operations, where sodium hydrosulfide (NaSH) acts as a sulfidizing agent for oxide ores as well as a copper depressant. Sodium hydrosulfide (NaSH) sulfidizing agent and copper depressant COPPER
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Surface properties of copper-sulfide minerals with sodium-hydrosulfide …
N2 - The surface properties of slightly oxidized chalcocite, bornite, and chalcopyrite with sodium hydrosulfide (NaHS) treatment were investigated by solid analyses of X-ray photoelectron spectroscopy, solution analyses, and zeta potential measurements. NaHS is known as a flotation activator for copper-oxide minerals by sulfurizing their surfaces.
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Improving the efficiency of oxide copper–cobalt ores …
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 ...
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Review, Evolution and Optimization of the Kansanshi …
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, …
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Acid leaching of oxide-sulfide copper ore prior the …
Based on the performed experimental results the flow sheet for processing of the mixed oxide-sulphide copper ore is proposed. ... the cyanide solution is mixed with sodium hydrosulfide NaSH and ...
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The Use of Polysulfide as an Alternative Sulfidising Reagent …
A sulfide ion selective electrode was used to control sulfidiser addition in the flotation testing of a synthetic and a naturally occurring ore containing malachite in order to compare the behaviour of sodium sulfide and calcium polysulfide. Both slug and controlled potential sulfidisation methods of addition were used. Under defined optimum CPS conditions, …
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A Flotation Technique for a Sulfide-Oxidized Cu-Co Mixed Ore …
It was also found that using sodium hydrosulfide (NaHS) was more beneficial than using sodium sulfide (Na2S) for the activation of cobalt oxide. ... The copper oxide ore in Dali, which contains 0. ...
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Choosing the Right Sodium Hydrosulfide (NaHS) for Your …
Choosing the right sodium hydrosulfide (NaHS) concentration is crucial for various industrial processes. NaHS is a versatile chemical compound used in multiple industries, and understanding its properties and applications is essential for making informed decisions.
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Practical aspects of oxide copper recovery with alkyl hydroxamates
The traditional method involves sulfidization (at -500 to -600 mV vs. a combination Sulfide Ion Electrode) using sodium sulfide (Na:S), sodium hydrosulfide (NaSH), or ammonium sulfide ((NH4)2S) followed by flotation using xanthate or other sulfide collectors (Jones et al., 1986; Nagaraj and Gorken, 1989). ... Oxide copper in the ore is perhaps ...
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Surface properties of copper-sulfide minerals with sodium-hydrosulfide
The surface properties of slightly oxidized chalcocite, bornite, and chalcopyrite with sodium hydrosulfide (NaHS) treatment were investigated by solid analyses of X-ray photoelectron spectroscopy ...
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Kandelium Care sodium hydrosulfide
Kandelium sodium hydrosulfide is indispensable in applications as diverse as leather tanning, mining, water and waste treatment, and the production of various chemicals. ... ore flotation is used to extract base metals like copper, lead, molybdenum, nickel, cobalt and zinc from sulfide ores. ... They are used as sulfidizing agents for metal ...
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Vulcanization Flotation Of Copper Oxide Ore
The vulcanizing agents are: sodium sulfide, sodium hydrosulfide, hydrosulfide ammonia, hydrogen sulfide, potassium sulfide, etc., and the most commonly used is sodium sulfide. A copper sulfide film is formed on the surface of the sulfided copper oxide ore to make the surface of the copper oxide mineral have the surface property of the copper ...
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Current Status of Copper-Ore Processing: A Review
An analysis of flowsheets for processing sulfide and oxide copper ores, reagent modes, processing equipment, and flotation indicators in some domestic and ... (100–200 g/t ore) is usually used to sulfidize the surface of oxide copper minerals at domestic plants; sodium hydrosulfide is less common. Foreign plants apply hydrogen sulfide as a ...
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Derivation of Flotation Kinetic Model for Activated and …
The wettability and floatability of oxidized chalcocite, bornite, and chalcopyrite with the conditions of sodium hydrosulfide (NaHS) dosages and pHs were studied by contact angle measurements, and single and mixture mineral flotation tests. To evaluate the results of the flotation, the flotation kinetic model for copper sulfide minerals treated by NaHS was derived. …
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A successful operational initiative in copper oxide …
Mexican copper ore (1.19%) containing mainly copper oxide (ramsbeckite and malachite) and some copper sulfide (chalcopyrite) minerals. In their research, flotation with butyl xanthate as collector and
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The recovery of oxide copper minerals from a complex …
The oxide ore has a much higher grade than the mixed and sulphide ores but contributes less to the resource (Broughton et al., 2002). The preferred method for the flotation …
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Practical aspects of oxide copper recovery with alkyl …
AbstractA combined process of flotation and high-gradient magnetic separation was proposed to utilize Yulong complex copper oxide ore. The effects of particle size ... complete behavior of flotation and depression of copper sulfides and oxides as a function of potential modified by sodium hydrosulfide in certain non-xanthate collector ...
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Optimization of flotation of the Qaleh Zari mine oxidized …
Sodium hydrosulfide (NaSH) and ammonium sulfide ((NH 4) 2 S) are among the sulfidizers employed on an industrial scale (Bulatovic, 2010). In a study con- ... properties of copper …
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