us5171428a flotation separation of arsenopyrite from

Arsenopyrite is separated from a mixture withpyriteby contacting the mixture with a sulfitic agent providingHSO3- ionsat elevated temperature and pH below about 8 for a period sufficient to...

Effective methods for selectiveseparationusingflotationor flocculationof arsenopyritefrom pyrite by biomodulation using Acidithiobacillus ferrooxidans are presented here. Adhesion of the bacterium to the surfaceof arsenopyritewas very slow compared to that to pyrite, resulting in a differenc …

WO1993010904A1-Flotation separation of arsenopyrite from...Arsenopyriteisseparatedfrom a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3- ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to thearsenopyrite.

In this study, the surface modificationof arsenopyriteand pyrite with low temperature oxygen plasma was developed as an effective approach to improve theflotation separationefficiency of minerals.

Jun 15, 2019· The efficient separation of chalcopyrite fromarsenic-bearing minerals, especiallyarsenopyrite, remains a challenge in practice. In this work, a novel reagent of N-Butoxycarbonyl-O-Isobutyl Thiocarbamate (NBOIT) was employed in both single and mixed binarymineral flotation, and it proved to be highly effective for the flotation separation.

Oct 01, 2006· The transition betweenflotationanddepressionofarsenopyriteis established by the reversible potential of the xanthate/dixanthogen couple.Adsorption of arsenate ionson ferric hydroxide has been studied through electrokinetics to delineate mechanisms involved in the depression ofarsenopyriteusing oxidants.

Sep 15, 2019· 1. Introduction.Arsenopyritenaturally coexists with other sulfide minerals, such as galena [], chalcopyrite [, , ], and pyrite [5,6], with ores that generally exhibit complex paragenetic relationships and small grain sizes.Flotationmay be a good method for separatingarsenopyritefrom other sulfide minerals; however,arsenopyriteis one of the comparatively less-studied sulfide minerals in ...

US2342277A US474491A US47449143A US2342277A US 2342277 A US2342277 A US 2342277A US 474491 A US474491 A US 474491A US 47449143 A US47449143 A US 47449143A US 2342277 A US2342277 A US 2342277A Authority US United States Prior art keywordsarsenopyritepyriteflotationpyrrhotite permanganate Prior art date 1943-02-02 Legal status (The legal status is an assumption and …

Accordingly the invention provides a froth flotation process for effecting separation of arsenopyrite mineral from pyrite mineral comprising conditioning at pH less than about 8 and at elevated temperature an aqueous pulp containing particles of said arsenopyrite and pyrite minerals, said conditioning being conducted with a sulfitic depressing agent providing HSO 3 ̅ ions added to said pulp in a quantity …

Jun 20, 2020· Theflotation separationtest of the pyrite-arsenopyriteartificial mixed minerals was conducted using the combined depressants. Fig. 5 depicts that a pyrite concentrate, with a grade of 49.85 wt.% S and 3.84 wt.% As and a recovery of 50.73 % S and12.11 % As was obtained.

Four oxidants, NaClO, KMnO 4, K 2 Cr 2 O 7, and H 2 O 2, were used to promote theflotation separationof pyrite (FeS 2) fromarsenopyrite(FeAsS).Oreflotationresults indicate that H 2 O 2 has the best selectivity for the As-Sseparation. When H 2 O 2 is used, the As content in pyrite concentrate decreases from 2.27% without addition of H 2 O 2 to 1.11% with H 2 O 2 dosage of 900 g/t, and ...

Dec 01, 2020· Theflotation separation of arsenopyritefrom the valuable sulfide minerals is still the most relatively effective method compared with gravity and magnetic concentration, which utilizes the ...

WO1993010904A1 - Flotation separation of arsenopyrite from... Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3- ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite.

In the ZnSflotation, the maximumseparationachievable for ZnS using frothflotationhas been shown to be a grade of 72.57% and a recovery of 95.43%. At this time, FeAsS removal of 87.8% (0.16% As) could be successfully accomplished under pH 11, and 800g/t Zn activator (CuSO4), 75g/t frother (AF65), 60g/t collector (AP211) and 600g/t As ...

FI121737B FI20070270A FI20070270A FI121737B FI 121737 B FI121737 B FI 121737B FI 20070270 A FI20070270 A FI 20070270A FI 20070270 A FI20070270 A FI 20070270A FI 121737 B FI121737 B FI 121737B Authority FI Finland Prior art keywords slurry minerals ore arsenic nickel Prior art date 2004-10-07 Application number FI20070270A Other languages

Flotation separationof pyrite fromarsenopyritein the presence of oxidants.SeparationScience and Technology, p. 1. ... As atoms could be one of the active sites for the oxidationof arsenopyrite. In addition,separation of arsenopyriteand pyrite could be achieved by utilizing the difference in chemical reactivities of iron in the two ...

The studies of pulp electrochemicalflotation separationof pyrite andarsenopyritewere made from the thermodynamics, mineral natural oxidation rate, property of mineral surface oxidised material and pulp electrochemicalflotationtests. The results showed that although pyrite andarsenopyritepossessed similar thermodynamic stability, significant differences of two minerals were observed in ...

Jun 20, 2020· Theflotation separationtest of the pyrite-arsenopyriteartificial mixed minerals was conducted using the combined depressants. Fig. 5 depicts that a pyrite concentrate, with a grade of 49.85 wt.% S and 3.84 wt.% As and a recovery of 50.73 % S and12.11 % As was obtained.

A successfulseparationwas seen to be possible employing Fl and by floating pyrite. This was proven by using a mixture of equal amounts of pyrite andarsenopyriteand selectively floating pyrite. Bench and columnflotationtests were carried out in order to confirm the results obtained with the Hallimond tube.

The aim of the research programme is to investigate the potential offlotationfor theseparation of arsenopyriteand pyrite minerals. The efficientseparationof pyrite andarsenopyriteby a cheap process such asflotationhas long been recognized as a desirable technological goal …

MORE DETAILS: EP0568672B1Flotation separation of arsenopyritefrom. On addition of a collector the pyrite is rendered floatable enabling frothflotationto achieve a concentrate rich in pyrite and tailings rich inarsenopyrite Arsenopyriteis separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3 ions at elevated temperature and pH below about 8 ...

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The artificial mixture (1:1) of pyrite andarsenopyritecould be successfully separated, and concentrates of pyrite containing 2.12 per cent (I), 7.00 per cent (II), 2.60 per cent (III) and 3.16 per cent (IV) arsenic with recovery of 90.9 per cent (1), 89.5 per cent (II), 89.0 per cent (III) and 81.4 per cent (IV) respectively can be obtained ...

The studies of pulp electrochemicalflotation separationof pyrite andarsenopyritewere made from the thermodynamics, mineral natural oxidation rate, property of mineral surface oxidised material and pulp electrochemicalflotationtests. The results showed that although pyrite andarsenopyritepossessed similar thermodynamic stability, significant differences of two minerals were observed in ...

Park et al. (2015) proposed that, theflotation separationof pyrite fromarsenopyritewas possible at high Eh because ferric arsenate; a stable hydrophilic species onarsenopyritewas affected by ...

Separationof finearsenopyriteand sulfide minerals using combination depressants . ... a d d i n g c o p p e r s u l p h a t e a n d o r g a n i c reagent Β· I t i s also e f f e c t i v e in the case offlotation separationof c h a l c o p y r i t e a n da r s e n o p y r i t e* ( o ) 9 a b u l k c o n c e n t r a t e o f Ou-Ag w i t h ...

Flotation separationof pyrite fromarsenopyritein the presence of oxidants.SeparationScience and Technology, p. 1. ... As atoms could be one of the active sites for the oxidationof arsenopyrite. In addition,separation of arsenopyriteand pyrite could be achieved by utilizing the difference in chemical reactivities of iron in the two ...

Four oxidants, NaClO, KMnO4, K2Cr2O7, and H2O2, were used to promote theflotation separationof pyrite (FeS2) fromarsenopyrite(FeAsS). Oreflotationresults indicate that H2O2 has the best ...

1. A frothflotationprocess for effectingseparation of arsenopyritemineral from pyrite mineral comprising conditioning at pH less than 8 and at a temperature of at least 30°C an aqueous pulp containing particles of saidarsenopyriteand pyrite minerals, the conditioning being conducted with a sulfitic depressing agent providing HSO 3 ̅ ions added to said pulp in a quantity sufficient to ...

Nov 01, 2014 However, the depression effect of cyanide on pyriteflotationis unlikely to be affected by either nickel ions or formaldehyde because cyanide has a stronger affinity with iron than nickel as can be seen from the thermodynamic stability constants in Table 1 and formaldehyde has no decomposition action over iron cyanide complexes.