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Reverse flotation of pyrite from a zinc-concentrate

1995-10-1  CONCLUSIONS Substituting nitrogen for air in reverse flotation of a Zn-concentrate selectively increased pyrite recovery: at 3% zinc recovery (i.e.loss) to the float product, nitrogen flotation increased pyrite recovery by about 5-10% (absolute) compared to air flotation.

Depression of pyrite in the flotation of high pyrite low

2010-1-1  Pyrite (FeS 2) is one mineral that responds to copper activation and can be floated together with sphalerite (Wills and Napier-Munn, 2006). Complete elimination of iron sulfides (e.g., pyrite, pyrrhotite) from zinc concentrates is economically attractive from the angle of

Depression of pyrite in the flotation of high pyrite low

In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus

Method of floatation of copper-zinc-pyrite ore

Selective scheme flotation of copper-zinc-pyrite ores used at a ratio in the ore zinc: copper more than 1 (mass fraction of zinc exceeds the mass percent of copper), and in the absence of secondary copper sulfides and generations of sphalerite with different degree of flotation activity. Copper-zinc-pyrite ore is crushed in a high alkaline environment, using reagents surge sphalerite, classified according to the

Pyrite flotation in the presence of metal ions and

1997-12-1  The flotation of valuable minerals of copper, lead and zinc from pyrite, the main sulphide gangue, has received considerable attention (Forssberg, 1985; Dobby and Rao, 1989). Recently, there has been growing suspicion that metal ions play a role in limiting selectivity of sulphide flotation.

The effect of zinc cyanide on the flotation of gold

2016-1-1  In this study, a pyritic gold ore was chosen to understand how zinc cyanide species affect gold flotation in line with the previous study (Guo et al., 2015) where the effect of copper cyanide species on gold flotation was studied. To explain gold flotation behavior in the presence of zinc cyanide species, the competitive adsorption between zinc cyanide species and thiol collectors on gold surface was studied.

Recovery of sphalerite from a high zinc grade tailing

2020-1-5  In this work, the flotation recovery of sphalerite and pyrite from an old high zinc grade tailing was studied. In particular, the effect of different flotation reagents such as collector, auxiliary collector, depressant, activators, and frother on the flotation performance were investigated.

Formation of zinc sulfide species during roasting of

2018-5-18  Flotation is the most common and commercial technique applied to recover nonferrous oxide minerals and for zinc recovery, sulfidization with alkali metal sulfides, followed by treatment with...

Technical Note Cyanide elimination from lead-zinc flotation

2015-12-27  Application of cyanide in Lead-Zinc (Pb/Zn) flotation dates back from 1922 when Sheridan-Grisvold process was introduced using the cyanide as depressant for the sphalerite and pyrite. The cyanide was proven to be a very efficient depressant and it is still used extensively in flotation

Effect of Water Composition on Flotation of Lead and

The various water resources employed during lead and zinc flotation caused activation, depression or selectivity effects on minerals due to the presence of different ions in solution.

(PDF) Depression of pyrite in the flotation of high

The pyrite flotation rate constant decreased significantly when A. ferrooxidans interacted with the flotation pulp for 20 min. 7. Validation experiments with different frothing times showed that in the presence of A. ferrooxidans, 74% of sphalerite was floated and the Zn grade surged to 26.21%, while the recovery of pyrite was only 15.82%.

Depression of pyrite in the flotation of high pyrite low

In this research work, selective depression of pyrite in the flotation of a low-grade lead-zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these bacteria using the optimum dosage of reagents. Sphalerite recovery and Zn grade in the obtained sphalerite concentrate were both enhanced by

Pyrite Activation in the Lead-Zinc Tailings Recovery

According to the conventional flotation practice, pyrite is a kind of sulphide with good floatability, which is easily inhibited by lime, sodium hydroxide and sodium cyanide in alkaline environment. Therefore, people often add sufficient lime to the grinder, then preferentially separate lead, zinc, copper and other metals.

Organic modifiers for flotation of copper-zinc-pyrite

Organic modifiers for flotation of copper-zinc-pyrite ores. F. I. Nagirnyak, et al., in: Flotation of Copper-Zinc and Zinc Ores from Urals [in Russian], Nedra, Moscow (1966). Google Scholar; Download references. Authors. O. N. Bel'kova. View author publications. You can also search for this author in .

Sulfidation roasting of zinc leaching residue with pyrite for

However, zinc and iron mainly exist in the form of zinc ferrite, which are difficult to separate and recover. This study proposed a new process involving sulfidation roasting, magnetic separation and flotation to recover zinc and iron in ZLR. Through sulfidation 3 O 4.

Flotation of sphalerite and pyrite in the presence of

2016-11-28  Pyrite is one of the major diluents of copper, lead and zinc concentrates. One explanation for the high flotation of pyrite in alkaline pH conditions is its inadvertent activation by copper either dissolved from copper minerals present in the ore or added in the zinc circuit to activate the flotation of sphalerite Bushell and Krauss, 1962

Sulfidation mechanism of ZnO roasted with pyrite

Zinc is an important base metal required for various applications and is mainly recovered from primary sulfide ores via flotation and metallurgical processes 1.With the rapid development of

Minerals Free Full-Text Selective Flotation of Pyrite

Pyrite is a major gangue mineral associated with galena and other valuable minerals, and it is necessary to selectively remove pyrite to upgrade the lead concentrate by froth flotation. In this study, the flotation experiments of a single mineral and mixed minerals were performed using chitosan with different molecular weights (MW = 2−3, 3−6, 10 and 100 kDa) as a depressant, ethyl

Technical Note Cyanide elimination from lead-zinc flotation

2015-12-27  Application of cyanide in Lead-Zinc (Pb/Zn) flotation dates back from 1922 when Sheridan-Grisvold process was introduced using the cyanide as depressant for the sphalerite and pyrite. The cyanide was proven to be a very efficient depressant and it is still used extensively in flotation

Influence of the Interaction between Sphalerite and

In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron spectroscopy (XPS), and electrochemical measurement. The micro-flotation test results showed that the recovery and flotation rate of sphalerite with copper sulphate as activator and butyl xanthate as collector were significantly decreased

Depression of pyrite in the flotation of high pyrite low

In this research work, selective depression of pyrite in the flotation of a low-grade lead-zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these bacteria using the optimum dosage of reagents. Sphalerite recovery and Zn grade in the obtained sphalerite concentrate were both enhanced by

Pyrite Activation in the Lead-Zinc Tailings Recovery

According to the conventional flotation practice, pyrite is a kind of sulphide with good floatability, which is easily inhibited by lime, sodium hydroxide and sodium cyanide in alkaline environment. Therefore, people often add sufficient lime to the grinder, then preferentially separate lead, zinc, copper and other metals.

Formation of zinc sulfide species during roasting of

SCiENtiFiC RepoRts Formation of zinc sulfide species during roasting of ZnO with pyrite and its contribution on flotation Yong-xing Zheng Jin-fang Lv Hua Wang Shu-ming Wen Jie Pang OPEN In this paper, formation of zinc sulfide species during roasting of ZnO with FeS2 was investigated and its contribution on flotation was illustrated.

Flotation Separation of High Sulfur Lead-Zinc Ore

According to the refractory lead-zinc ore properties with high pyrite, the experimental studies were conducted on floatation reagent conditions and closed circuit tests for comprehensive recovering of all types useful minerals. In comparison to the test results of different process flowsheets and different types of flotation reagents, adopting prior flotation lead (Pb)—Zn selective flotation

Effects of Process Parameters on Selective Flotation of

2012-10-15  cyanide and zinc sulphate as depressant and flotation of lead minerals using potassium ethyl xanthate as collector and methyl iso-butyl carbinol (MIBC) as frother. Lime was used as pH regulator and this also helped in depression of pyrite. Subsequently zinc was floated using copper 425

Pyrite Depression Froth Flotation (Sulphide & Oxide

2021-3-13  To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on

Critical importance of pH and collector type on the

Figure 11 shows flotation kinetic rates of zinc and iron in the zinc flotation stage. The average flotation rate constant (k) and the ultimate recovery (R ∞) were tabulated in Table Table3. 3. According to Table Table4, 4, the average flotation rate constant of zinc at pH 6 is more than 2 times its value at pH 8. The ultimate recovery was

Chapter 7. Depression of sphalerite with cyanide and zinc

2014-12-10  Chapter 7. Depression of sphalerite with cyanide and zinc sulphate 102 Chapter 7. Depression of sphalerite with cyanide and zinc sulphate 7.1. Introduction Cyanide is the only depressant currently used at the Rosh Pinah Mine to depress sphalerite and pyrite in the lead flotation circuit. As explained in Chapter 2, cyanide

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

2015-10-19  This cyanide complex depresses pyrite from about pH 6 to pH 11. Above pH 11 the stable species on pyrite surface is Fe(OH)3. 3. 2Sulphite as depressant (SO 3 -) Since dixanthogen is the species responsible for pyrite flotation -X 2 + 2e 2X-E 0 = -0.06 volt

A review of the fundamental studies of the copper

This ensures pyrite is sufficiently depressed while sphalerite floats. Good water quality with low concentrations of contaminant ions, such as Pb(2+)and Fe(2+), is also needed to limit inadvertent activation and flotation of pyrite into zinc concentrates.