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Flotation Iron Pyrite

Flotation of Pyrite Metallurgist & Mineral Processing

Sodium silicate was somewhat effective in causing a differential or selective flotation of copper, as chalcopyrite from pyrite by keeping pyrite from floating. Sodium hydroxide and sodium sulfide gave, in most cases, a distinct separation of sphalerite from chalcopyrite; i.e., a high copper and low zinc by suppressing the flotation of sphalerite.

(PDF) Pyrite Flotation: A Review ResearchGate

Complex sulfide ores are concentrated mainly through flotation. Sulfide minerals are semiconductors, and pyrite is the major gangue mineral associated with these ores. Main interest in the

Floatation of Ok Tedi Pyrite AusIMM

Pyrite is a significant gangue sulphide mineral in the Ok Tedi copper ore. Its presence in the flotation concentrate is not entirely desirable since it lowers the grade of the final copper concentrate. Lime depression of the pyrite has been practiced with some success. However, it has been observed that at the pH for pyrite...

Pyrite Tailings Recovery by Flotation

Pyrite has long been used as a source of sulphur, and its recovery as a by-product from the flotation of certain base metal ores is a well established practice. Large tonnages of mill tailings which have accumulated as a result of various milling operations frequently contain significant amounts of pyrite. In many instances these tailings can be treated to yield pyrite concentrates that are a

Recovery of pyrite from copper tailings by flotation

The pyrite grade in the fresh tailing sample and in the flotation product was determined indirectly from the content sulfur, copper and iron. Calculations carried out considering the elemental chemical composition presented in Table 1 and the mineralogical species that contained sulfur, identified by the XRD analysis, allowed to determine that the fresh tailings sample contained 4.56% FeS 2

Author: Mario Santander, Luis Valderrama

Pyrite Depressant Froth Flotation (Sulphide & Oxide

Flotation of copper at different alkaline pH from 7upto 10 and using different Xanthates as collector vs. recovery of copper may give some clue. Minimum Pyrite obtained in copper concentrate is the starting point for further flotation test work. Depressing Pyrite is always a tricky matter. The non- float is naturally your Pyrite Concentrate

Selective flotation of chalcopyrite from pyrite using

15/08/2019· (a) Flotation recoveries of chalcopyrite and pyrite as a function of pH using HEDP or EX as collector in single mineral test; (b) Copper grade and recovery in chalcopyrite concentrate as a function of collector concentration at pH 9.0 in binary mineral mixture test.

Collectorless flotation of oxidized pyrite ScienceDirect

20/01/2019· At pH 3, the flotation recovery of pyrite increased up to 50% after 60 min of sonication and then with the further increase in sonication time (90 min.) the flotation recovery decreased to 40%. The pH of the pulp has a great influence on collectorless flotation of pyrite.

Modelling of pyrite depression process by lime in copper

maximum pyrite (1), Pyrrhotite (2) and chalcopyrite (3) flotation. Floatability of copper and iron sulphides in the absence of lime can be explained by taking into account the composition of natural sulphides oxidation products (Abramov 1978). Early, it has been found that for iron

Depressants for Pyrite / Flotation depressants

Additionally, conventional pyrite depressants such as sodium cyanide, sodium hydro sulfide and Nokes reagent are toxic, highly regulated, difficult to handle and present an overall costly alternative. Figure 1: Copper / Iron ratio for recovery in flotation test for 150g/t Pionera F-250

Depressants and dispersants Huntsman Corporation

Iron sulfide (pyrite, pyrrhotite, marcasite) depressant used in the flotation separation of base metal sulphides. Also used as an alternative partial cyanide replacement to depress iron and zinc sulfides in Pb / Zn flotation. UNIMAX ® SD210. Iron sulfide (pyrite, pyrrhotite, marcasite) depressant used in the flotation separation of base metal

Pyrite Flotation Froth Flotation (Sulphide & Oxide

Can you list the factors affects the floatability of pyrite from refractory low grade ore.I used a Wemco lab flotation cell and aimed on analysing factors like collector dosages (PAX), Activator (Copper sulphate),MIBC , pH and others like pulp density and particle size (70 and 150 microns) .However

The role of sodium metabisulphite in depressing pyrite in

In response to the high pyrite recovery in copper flotation using seawater, this study investigated the role of sodium metabisulphite (MBS), a widely used pyrite depressant, in depressing the flotation of copper-activated pyrite to identify a solution to maximising pyrite rejection.

The effect of saline water on copper activation of pyrite

15/01/2019· 1. Introduction. Chalcopyrite, the major mineral for copper production, is often found finely interlocked with iron sulfide minerals, particularly pyrite (Owusu et al., 2014).Pyrite is usually perceived as a gangue mineral and removed by flotation to minimize its contamination in copper concentrates (Wang and Forssberg, 1991).In froth flotation, hydrophobic particles are supposed to attach to

Pyrite roasting, an alternative to J sulphur burning

tail/flue gases, iron sulphate, to name only a few. In some countries, pyrites and iron sulphide ores still constitute an important raw material basis for sulphur dioxide production, especially as the primary stage for sulphuric acid manufacture. The most important iron sulphide minerals are pyrite FeS2 as well as pyrrhotite Fe7S8. They occur

Pyrite Oxidation Kinetics How Fast does Pyrite Oxidize

Pyrite oxidation has been studied extensively, in the past, because of its importance in sulfide mineral separations by flotation, in the generation of acid in mine waters and in leaching of pyrite. The oxidation of pyrite also plays key role in supergene alteration of ore deposits, the formation of acid sulfate soils, etc. Pyrite oxidation is generally recognized as a complicated process

The effect of saline water on copper activation of pyrite

15/01/2019· 1. Introduction. Chalcopyrite, the major mineral for copper production, is often found finely interlocked with iron sulfide minerals, particularly pyrite (Owusu et al., 2014).Pyrite is usually perceived as a gangue mineral and removed by flotation to minimize its contamination in copper concentrates (Wang and Forssberg, 1991).In froth flotation, hydrophobic particles are supposed to attach to

INFLUENCE OF PYRITE CONTENT ON THE FLOTATION OF

Flotation tests showed that the flotation chemistry and recovery of chalcopyrite are affected by the proportion of pyrite present. Both chalcopyrite flotation recovery and grade decreased with increasing pyrite content. XPS results confirm that copper activation of pyrite increases with increasing pyrite content, reflecting the

The selective flotation of arsenopyrite from pyrite

The selective flotation of arsenopyrite from pyrite can be realized by adding a magnesium-ammonium mixture depressant [26]. As we all know, arsenic is a highly toxic substance that causes great

Collectorless Flotation of Oxidized Pyrite | Request PDF

The effects of ultrasonication on the hydrophobicity of oxidized pyrite and the flotation of an oxidized pyrite ore were investigated in this work. Surface examinations show that ultrasonication

(PDF) Selective flotation of chalcopyrite from 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.

A study on the effect of active pyrite on flotation of

activated pyrite flotation. They demonstrated that the pulp oxidation potential is one of the important factors controlling the copper-activated pyrite flotation so that it can determine the different proportions of hydrophobic and hydrophilic species on the pyrite surface (He et al., 2005).

Pyrite depression by dextrin in flotation with xanthates

Both pyrite types showed high recoveries at pH 4.75 to 8, but in the flotation of iron oxides-pyrite, partial depression was found in the pH range of 6–7. The presence of iron ions in solution

Minerals | Free Full-Text | Selective Flotation of Pyrite

In this study, the surface modification of arsenopyrite and pyrite with low temperature oxygen plasma was developed as an effective approach to improve the flotation separation efficiency of minerals. The micro-flotation experiments results indicated that plasma pre-treatment can achieve selective flotation of arsenopyrite from pyrite. The XPS analysis results indicated that the oxidation

Pyrite Wikipedia

Iron pyrite is unstable at Earth's surface: iron pyrite exposed to air and water decomposes into iron oxides and sulfate. This process is hastened by the action of Acidithiobacillus bacteria which oxidize the pyrite to produce ferrous iron and sulfate. These reactions occur more rapidly when the pyrite is in fine crystals and dust, which is the

Dispersive effect of low molecular weight sodium

The ore for a batch flotation test was a refractory iron sulphide ore (skarn -type, containing serpentine, d 80 size of feed from plant and ground material under 75 μm) from the Shaopo iron sulphide Mine of Yunnan Province, China. The main iron-bearing minerals were pyrite, and the liberation size of pyrite was below 75 μm. XRD

Flotation Iron Pyrite

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