High and New Technology Industrial Development Zone, Zhengzhou, China [email protected]
  1. Home
  2. > us5171428a flotation separation of arsenopyrite from

us5171428a flotation separation of arsenopyrite from

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

US5171428A Flotation separation of arsenopyrite from

Arsenopyriteisseparatedfrom a mixture withpyriteby contacting the mixture with a sulfitic agent providing HSO 3 - ions at elevated temperature and pH below about 8 for a period sufficient to...

WO1993010904A1 Flotation separation of arsenopyrite from

Arsenopyriteisseparatedfrom a mixture withpyriteby contacting the mixture with a sulfitic agent providing HSO3- ions at elevated temperature and pH below about 8 for a period sufficient to...

Flotation separation of pyrite from arsenopyrite in the

ABSTRACT. 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 ...

Selective separation of arsenopyrite from pyrite by

Effective methods for selectiveseparationusingflotationor flocculation ofarsenopyritefrom pyrite by biomodulation using Acidithiobacillus ferrooxidans are presented here. Adhesion of the bacterium to the surface ofarsenopyritewas very slow compared to that to pyrite, resulting in a differenc …

arsenopyrite pyrite said

WO1993010904A1 -Flotation separation of arsenopyritefrom...Arsenopyriteis separated from a mixture withpyriteby 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 …

(PDF) Flotation and depression control of arsenopyrite

Bonding schemes for compounds theirflotationbehavior. Minerals Engineering 15, 1037–1048. with the pyrite, marcasite andarsenopyritetype structures. Acta Sirkeci, A.A., 2000b. Theflotation separationof pyrite fromarsenopyriteChemica Scandinavica 24, 2993–3012. using hexyl thioethylamine as collector.

Adsorption performance of copper ions on arsenopyrite

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 ...

Selective Flotation of Pyrite from Arsenopyrite by Low

In this study, the surface modification ofarsenopyriteand pyrite with low temperature oxygen plasma was developed as an effective approach to improve theflotation separationefficiency of minerals. The micro-flotationexperiments results indicated that plasma pre-treatment can achieve selectiveflotationofarsenopyritefrom pyrite. The XPS analysis results indicated that the oxidation ...

Flotation separation of arsenopyrite from pyrite BEATTIE

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

FLOTATION SEPARATION OF ARSENOPYRITEFROM PYRITE

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 ...

Flotation separation of pyrite from arsenopyriteusing

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.

Flotation separationof pyrite fromarsenopyritein the

ABSTRACT. 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 ...

Removalof arsenopyritefrom complex sulfide minerals by

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 ...

arsenopyritepyrite said

US5171428A - Flotation separation of arsenopyrite from... 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 HSO 3 - ions at ...

(PDF) SelectiveFlotation of Pyrite from Arsenopyriteby

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.

Separationof finearsenopyriteand sulfide minerals using

Separationof finearsenopyriteandsulfide 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 ...

Adsorption performance of copper ions onarsenopyrite

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 ...

The selective flotation of arsenopyrite from pyrite

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

Selectiveseparation of arsenopyritefrom pyrite by

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 …

SelectiveFlotationof Pyrite fromArsenopyriteby Low

However, as the physical and chemical propertiesof arsenopyriteare similar to those of pyrite,arsenopyritepresents a similar hydrophobicity with pyrite in theflotationprocess when xanthate serves as collector [8,9].As their hydrophobic surface species are dixanthogen, xanthates are not cation-selective in the case ofseparation of arsenopyriteand pyrite, which makes it very difficult by ...

Electronic and chemical structures of pyrite and arsenopyrite

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 ...

Flotation separation of arsenopyrite from pyrite BEATTIE

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

Effect of dextrin onflotation separationand surface

Nov 27, 2020· Theflotation separationand mechanism of dextrin on chalcopyrite andarsenopyritesurface were investigated by micro-flotationtests, zeta potential measurements, infrared spectroscopy, Contact angle measurement and surface adsorption experiments.

(PDF)Selective separation of arsenopyrite froman

ARSENOPYRITE SEPARATIONFROM AURIFEROUS PYRITE BY SULPHONATEFLOTATION151 Methyl isobutyl ketone, a frother, when added in the pulp, improved theflotationresults. In this case, lower concentrations of reagents (collector and modifier) were also required.

(PDF) SelectiveFlotation of Pyrite from Arsenopyriteby

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.

SelectiveFlotation of Pyrite from Arsenopyriteby Low

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. The micro-flotationexperiments results indicated that plasma pre-treatment can achieve selectiveflotation of arsenopyritefrom pyrite. The XPS analysis results indicated that the oxidation ...

Separationof Pyrite andArsenopyritein a Gold Sulfide

Gold at the Harbour Lights Mine (HLM), WA occurs principally in pyrite (Py) andarsenopyrite(AsPy) minerals rendering it inaccessible to direct cyanidation. Frothflotationproduces a concentrate with low mass recovery and with high recoveries of sulfides. After investigating several alternatives, a novelflotationprocess has been developed to separate the concentrate into pyrite...

Frontiers Flotation Separation of Diaspore and Kaolinite

Dec 12, 2019· Sodium oleate (NaOl), a collector in diasporeflotation, has been widely used for more than 30 years, while its low selectivity becomes an issue under today's process requirement. This study introduced tert dodecyl mercaptan (TDM) together with NaOl as a mixed collector to improve selectivity in diasporeflotation. We found that using the mixed collector of NaOl/TDM (total concentration 0.1 …

Depressionof Arsenopyrite Flotationand itsSeparation

Description. In this paper it is recommended that pyrite is to be separated as froth fromarsenopyriteby selective depressionof arsenopyritein strong alkaline medium (1), by oxidation with chlorinated lime (II), by co-use of chlorinated lime with sodium carbonate (III), and by modification with `L’ reagent (know-how) without filtering to get rid of residual copper ions after Cu activation ...

Separationpractice of copper arsenic sulfide ore

II.Separationpractice of copper arsenite sulfide. The research results at home and abroad show that theseparation of arsenopyriteand copper sulfide can be realized completely by using the existing beneficiation technology. It has been reported in Japan that chalcopyrite andarsenopyrite…

Mineral processing Concentration Britannica

Mineral processing-Mineral processing- Concentration: Concentration involves theseparationof valuable minerals from the other raw materials received from the grinding mill. In large-scale operations this is accomplished by taking advantage of the different properties of the minerals to be separated. These properties can be colour (optical sorting), density (gravityseparation), magnetic ...

Click avatar to contact us
Chat Online