Sodium Hydrosulfide For Oxide Copper Ores

The traditional method involves sulfidization (at-500 to -600 mV vs. a combination Sulfide Ion Electrode) using sodium sulfide (Na2S), sodium hydrosulfide (NaSH), or ammonium sulfide ((NH4)2S) followed by flotation using xanthate or other sulfide collectors. ... Oxide copper in the ore is perhaps not recoverable by flotation.

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

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 ...

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

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 ...

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 ...

Sodium hydrosulfide can also be in a solution form and appears as a colorless to light-yellow liquid. Chemical Applications. NaHs main uses are in manufacturing as a replacement chemical for sulfur, as a flotation agent in copper mining where it is used to activate oxide mineral species and other various industries such as:

The major contributors to ore variability include hydrothermal alteration, oxidation, and weathering of a pristine ore deposit. The alteration of sulphide minerals by oxidation can lead to reduced ...

Patch clamp studies of neuroblastoma cells have shown that in the presence of sodium hydrogen sulfide, the in vitro precursor of hydrogen sulfide, addition of the sulfonated amino acids, taurine or cysteic acid resulted in reversible abolition of the inward of the sodium currents. This effect could also be demonstrated by preincubating cells for 3-20 min within 5-10 mM sodium hydrosulfide ...

The method is to sulfurize oxidized minerals with sodium sulfide or other sulfurizing agents (such as sodium hydrosulfide), and then flotation with high-grade xanthate as collector. ... This method is used to treat copper oxide …

Different schematics like anionic exchange, electrochemical reactions and direct precipitation have been proposed depending on the properties of surface oxides to describe the behavior of sodium hydrosulfide (NaHS) on the mineral surface [20], [21].The performance of NaHS on the chalcopyrite surface was evaluated with XPS analysis [22], [23], and concluded …

A new flowsheet was developed to recover the valuable minerals from oxide or oxide-sulfide ores of lead and zinc. The flowsheet consisted of flotation of sulfide minerals, desliming and sulphidization-flotation of oxide minerals. The corresponding reagent system and techniques to the flowsheet were investigated. Batch and continuous tests show that the dosage of sodium …

Sodium sulfide, ammonium sulfide, sodium hydrosulfide, and sodium polysulfide are common sulfidizing reagents in sulfidization flotation [5,80,85]. ... For copper oxide ores that contain weak magnetic copper-bearing minerals, such as libethenite, and copper-bearing limonite, after sulfidization flotation, the flotation tailings can be ...

In this study, therefore, we focused on the activation of the copper mineral surfaces using sodium hydrosulfide (NaHS) to render the surfaces hydrophobic and tried to quantify the effect of the ...

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 …

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. ...

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 …

Kansanshi copper mine is situated in the north western province of Zambia. As a result of the mineral variations, the processing plant treats three distinct ore types, viz. oxide, sulphide and mixed.

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 the ...

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, …

Mechanochemical sulfidization of a mixed sulfide/oxide copper ore by co-grinding with sulfur and additives including Mg(NO3)2 and Fe(NO3)3 salts and iron, aluminum and magnesium powders was ...

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 ...

Sodium Hydrosulfide - NaHS (flake 70%) . CAS No.: 1 HS CODE.: 28301090 Na2CO3<1.0% Mining: used as flotation agent for copper/molybdenum ores.

In these studies, agents such as sodium hydrosulfide (NaHS), ammonium sulfide ((NH ... copper oxide ore on the results of flotation performance is a key issue that has not been taken into

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.

The primary health hazards associated with sodium hydrosulfide are the inhalation of highly toxic H 2S vapors and the corrosiveness of the solution in contact with human tissue. INHALATION Inhalation of product vapors, hydrogen sulfide, is very dangerous. Hydrogen sulfide is a colorless gas with a rotten egg odor.

Sodium Hydrosulfide (NaHS) Caustic Soda (NaOH) Services; NaHS Applications; ... NaHS is an effective means of sulfidizing oxide ores and is used most commonly to separate copper (Cu) from molybdenum (Mo). NaHS does this by depressing the copper from the molybdenum concentrate, allowing for conventional floatation metal separation.

In the following, you can read more about sodium hydrosulfide uses in different parts of the industry. Sodium Hydrosulfide and Its Properties. Sodium Hydrosulfide, with the chemical formula NaSH, is a significant chemical compound formed by the half-neutralization of hydrogen sulfide (H 2 S) with sodium hydroxide (NaOH). It displays fascinating ...

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 ...

The method involves multistage addition of sodium sulphide (Na2S), sodium hydrosulphide (NaHS), or ammonium sulphide (NH4)2S as a sulphidizing agent, together with xanthate …