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Flotation separation of arsenopyrite from pyrite

arsenopyrite pyrite pulp concentrate conditioning Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number AU29392/92A Other versions AU649175B2 (en Inventor ...

Flotation Behavior of Arsenopyrite and Pyrite, …

This study investigated the effect of pH and pulp potential (E H) on the floatability of arsenopyrite and pyrite, which are single minerals, in Hallimond tube, by using xanthate …

Effect of dextrin on flotation separation and surface properties …

At present, the most commonly used technology to separate copper-bearing ore from other ores is froth flotation (Liu et al. 2017), and separation of different ores is a common problem in flotation process.However, in the flotation separation of chalcopyrite and arsenopyrite, it is difficult to separate chalcopyrite and arsenopyrite because of the …

Results in Physics

the separation performance was firstly investigated, and this was achieved at a magnetic induction of 1.2T and pulsating frequency of 200r/min, and with a matrix of 2.0mm diameter wires.

Characterization of Arsenopyrite Depression During Collectorless

A conditioning time of 3 min was given for each reagent addition. In this way, the starting pH of the flotation without arsenopyrite collector in the presence of different amounts of the Al 2 (SO 4) 3 /Na 2 SiO 3 mixture is between 5.5 and 5.8. At the end of the flotation test, the concentration of hydrogen ions in the pulp decreases, that is, the pH …

EP0568672A1

Arsenopyrite is separated from a mixture with pyrite by bringing the mixture into contact with a sulfitic agent providing HS03- ions at high temperature and a pH below 8 for a time sufficient to impart to the arsenopyrite a property d selective sinking. With the addition of a collector, the pyrite is made floating, allowing the to float to obtain a concentrate rich …

Selective depression of arsenopyrite with in situ generated

Here, the flotation of artificial mixed ore of pyrite/arsenopyrite was conducted to verify the separation effect of ZnSO 4 on pyrite/arsenopyrite system in Na 2 CO 3 and SBX solution. When the pyrite:arsenopyrite was 10:1, the S and As grade of the mixed ore were 50.26% and 4.18%; when the ratio was 5:1, the S and As grade were 47.71% and …

Effect of dextrin on flotation separation and surface …

The flotation separation of chalcopyrite and arsenopyrite was enabled by dextrin. The effect of dextrin on the surface properties of arsenopyrite is greater than on …

A review on arsenic in the environment: contamination, …

There are several routes of human exposure to arsenic from both natural and anthropogenic sources. 14,15 Regarding geogenic sources, the Earth's crust is an abundant natural source of arsenic, 16 with an average concentration of As of ≈5 mg kg −1. 17 It is present in more than 200 different minerals, the most common of which is arsenopyrite ...

Application of macromolecular organic polymer S-7261A in …

An organic compound S-7261A exhibiting satisfactory selectivity and powerful depression on arsenopyrite was introduced to replace sodium sulfite (Na 2 SO 3) in the separation of Cu-S-As bulk concentrate in Yunnan Datun Mill.The results of batch flotation tests indicated its excellent selective depressing power on both pyrite and …

Flotation separation of pyrite from arsenopyrite by surface …

Natural arsenopyrite and pyrite samples used in this study were obtained from Yunnan Province, China. The elemental compositions of mineral samples are shown in Table 1.High-purity samples were manually selected and ground to −75 μm, of which the −75 + 38 μm particles were used for flotation tests, plasma modification pulp chemistry …

The selective flotation of arsenopyrite from pyrite

It was found that with MAA, depression of arsenopyrite was possible however, the recovery of pyrite was also adversely affected. To achieve the best separation, the pulp conditions were a pH of 8, 2.14 × 10 −3 mol/l sodium ethyl xanthate and 250 mg/l of MAA depressant. These conditions resulted in an overall arsenopyrite …

Flotation separation of arsenopyrite from pyrite

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. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate …

SEPARATION OF PYRITE FROM ARSENOPYRITE …

some cases amyl xanthate was blended. The effect of collector concentration was monitored and other parameters were adjusted for an optimum separation. Observations showed …

Flotation separation of pyrite from arsenopyrite in …

ABSTRACT. Four oxidants, NaClO, KMnO 4, K 2 Cr 2 O 7, and H 2 O 2, were used to promote the flotation separation of pyrite (FeS 2) from …

(PDF) Oxidative Depression of Arsenopyrite by Using …

Ca (ClO)2 was combined with sodium humate (SH) to improve the flotation separation of chalcopyrite from arsenopyrite. Results of single-mineral flotation indicated that combined Ca (ClO)2 and SH ...

Differential flotation of pyrite and arsenopyrite: Effect of …

The separation of arsenopyrite from pyrite has always been a complication due to the lack of green and high-efficiency flotation reagents. In this study, a macromolecular organic depressant soluble starch (SS) was introduced, and its application and depression mechanism in the selective flotation separation of arsenopyrite and …

Arsenic Pyrite Gold Extraction by Alkaline …

The alkaline oxidative leach pretreatment for gold-bearing arsenopyrite ores uses mild conditions, and the leach residue requires no washing or pH adjustment before cyanidation. By using 2M NaOH, 100° …

Differential flotation of pyrite and Arsenopyrite: …

Some of the merits related to separating arsenopyrite from pyrite are: i) reduction in processing cost, ii) adequate handling of concentrate tonnage to be …

(PDF) Flotation of an Oxidized Copper Sulfide …

This process can recover copper effectively, leading to the recovery of Cu increase to 70.05%.A combined technological process of high intensity magnetic separation-gravity separation is used to ...

Evaluation of the difference in adsorption of sodium alginate …

The separation of chalcopyrite and arsenopyrite using conventional flotation methods is difficult because they have similar floatability and surface properties [9], [10], [11]. Simultaneously, the dissolved copper ions in chalcopyrite also activate arsenopyrite minerals, which further increases the difficulty of separation.

Electronic and chemical structures of pyrite and arsenopyrite

In arsenopyrite, Fe–Fe distances are alternately long and short. The low spin density of the Fe d electrons supports this configuration in arsenopyrite. However, electron density calculations indicate that there is negligible electron density present between Fe atoms. This result indicates that cation-anion interactions are dominant in ...

Biomining of metals: new challenges for the next 15 years

The challenge is running, and the opportunity for the mining industry is at hand. To tackle these hydrometallurgical challenges in a sustainable manner, water must be used efficiently. Water is essential for mining operations; it is needed in the mine as well as in the ore processing and valuable metals recovery.

Activation mechanism of ammonium oxalate with pyrite in …

The activation properties of ammonium oxalate on the flotation of pyrite and arsenopyrite in the lime system were studied in this work. Single mineral flotation tests showed that the ammonium oxalate strongly activated pyrite in high alkalinity and high Ca2+ system, whereas arsenopyrite was almost unaffected. In mineral mixtures tests, the …

Electronic and chemical structures of pyrite and …

Abstract. The first-principles plane-wave pseudopotential method is used to study the electronic and chemical structures of pyrite (FeS 2) and arsenopyrite (FeAsS). …

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly

The effects of ZnSO4 on arsenopyrite depression were studied with sodium carbonate and sodium isobutyl xanthate (SIBX) as the pH regulator and collector, respectively. In both micro and real ore flotation tests, ZnSO4 showed better depression on arsenopyrite (pH 7.5–9.0 adjusted by Na2CO3) compared with sodium humate. The …

Differential flotation of pyrite and arsenopyrite: Effect of …

1. Introduction. Pyrite and arsenopyrite are the most important mineral phases in sulphide refractory gold ores due to their associative property in hosting gold and concomitant effect on gold extraction processes (Arehart et al., 1993, Asamoah et al., 2018a, Asamoah et al., 2019c, McCarthy et al., 2018, Zhang et al., 2016).Hydrometallurgical …

Surface properties and flotation inhibition mechanism of air …

The separation of arsenopyrite from pyrite has always been a complication due to the lack of green and high-efficiency flotation reagents. In this study, a macromolecular organic depressant soluble starch (SS) was introduced, and its application and depression mechanism in the selective flotation separation of arsenopyrite and …

The selective flotation of arsenopyrite from pyrite

The separation of arsenopyrite from pyrite has always been a complication due to the lack of green and high-efficiency flotation reagents. In this study, a macromolecular organic depressant soluble starch (SS) was introduced, and its application and depression mechanism in the selective flotation separation of arsenopyrite and …

(PDF) A Brief Review of Auriferous Sulphide Flotation Concentration

Separation of gold predominated arsenopyrite minerals from less economical pyrite phase maximises downstream unit feed and improves financial performance of the operation. This paper briefly ...