Comparative voltammetric studies were performed between high purity pyrite mineral (98.86%) and arsenopyrite mineral (content of 85.96% arsenopyrite, FeAsS; 11.84% pyrite, FeS2; 0.98% galena, PbS; 0.06% chalcopyrite, CuFeS2) in order to analyze the galvanic effect on the electrochemical reactivity of two different mineralogical phases …

The selective action mechanism of sodium butyl xanthate (BX), ammonium salt (NH4+), and sodium m-nitrobenzoate (m-NBO) on pyrite and arsenopyrite was examined by experiments and quantum chemistry. The experiments show that under alkaline conditions, ammonium salt (NH4+) and m-NBO can have a strong inhibitory …

The pyrite and arsenopyrite model minerals were obtained from GeoDiscoveries in Australia. Chemical and mineralogical analysis of the samples using inductively coupled plasma mass spectrometry (ICP-MS) and Quantitative X-ray Diffraction (QXRD) analysis are shown in Table 1. ... (IPETC) is selective in the separation of …

Thionocarbamate, specifically modified Isopropyl Ethyl Thionocarbamate (IPETC) is selective in the separation of pyrite from arsenopyrite, following copper activation. In this work, the flotation response of a refractory gold (Au) ore containing arsenic (As) mainly in the form of arsenian pyrite is investigated to reject gold-barren sulphidic ...

Arsenian pyrite containing above 1 wt% As plays a crucial role in deposition and deportment of Au and other chalcophile elements. The importance of arsenian pyrite led to theoretical and experimental studies that examined properties and genesis of the mineral; however, the interpretation of the phase relations between arsenian pyrite and …

The separation of pyrite and arsenopyrite is therefore required; however, the process is difficult. The present work employed the combination of sodium carbonate (Na2CO3) and sodium humate (HA) as ...

A pressure oxidation procedure that has gained commercial status for treating gold-bearing arsenopyrite or pyrite employs sulfuric acid (H2SO4) and oxygen as reagents. High temperatures (170° to 190° C) and pressures (up to 400 psig O2) are required to achieve complete oxidation of the sulfide minerals. The chemistry of these …

The Top Chart displays the liberation of arsenopyrite in two dimensions. At the initial nominal primary grind size of 50µm K80, the liberation varied between about 76 and 85 percent, with an average of 82 percent. There was minor interlocking with gangue and pyrite, being, on average, 12 and 5 percent, respectively.

The separation of pyrite and arsenopyrite is therefore required; however, the process is difficult. The present work employed the combination of sodium …

In fact, the arsenopyrite has a much smaller magnetic susceptibility than that of pyrite, whose susceptibility is nevertheless similar to weakly magnetic …

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 Ca 2+ system, whereas arsenopyrite was almost unaffected. In mineral mixtures tests, the …

... A novel approach which involves the use of low temperature oxygen plasma pre-treatment was also used to successfully depress arsenopyrite while pyrite was …

This study revealed the selective depression mechanism of soluble starch (SS) in the flotation separation of pyrite and arsenopyrite. Micro-flotation tests …

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 …

Separation of arsenopyrite from pyrite is usually achieved by selective depression of arsenopyrite using depressants like cyanide or oxidizing agents (e.g., hydrogen peroxide and magnesia-ammonia …

There being no established process for separating arsenopyrite from pyrite, a new separation process was developed. The main principle of this separation process is to achieve non-selective depression of all the sulphides and then selectively reactivate the pyrite with a suitable collector. Total depression of sulphides is achieved by ...

Flotation separation of pyrite from arsenopyrite using sodium carbonate and sodium humate as depressants [J]. Colloids and Surfaces A, 2020, 595: 124669. [6] LU Ji-wei, TONG Zhong-yun, YUAN Zhi-tao, LI Li-xia, Investigation on flotation separation of chalcopyrite from arsenopyrite with a novel collector: N-butoxycarbonyl-O- isobutyl ...

DOI: 10.1016/S0301-7516(00)00023-5 Corpus ID: 97556968; The flotation separation of pyrite from arsenopyrite using hexyl thioethylamine as collector @article{Sirkeci2000TheFS, title={The flotation separation of pyrite from arsenopyrite using hexyl thioethylamine as collector}, author={Ayhan Ali Sirkeci}, …

On the other hand, separation of pyrite from arsenopyrite has been a problem due to their similar flotation behaviour with sulphidic collectors. Conventional techniques for separation of pyrite from either chalcopyrite or arsenopyrite utilize depressants like cyanide or oxidizing agents like permanganates and …

Notwithstanding, in the separation of gold bearing sulphides during froth flotation, a concentrate made up of both pyrite and arsenopyrite is obtained due to their similar characteristics and ...

The elec- trokinetic measurements of the pyrite and arsenopyrite/ permanganate systems was used for interpretation of the floatability experiments. ARSENOPYRITE SEPARATION FROM AURIFEROUS …

Conventional techniques for separation of pyrite from either chalcopyrite or arsenopyrite utilize depressants like cyanide or oxidizing agents like permanganates and magnesia–ammonia mixture for selective oxidation of arsenopyrite (Randol, 1992, Yen and Tajadod, 1999). Thus, there is still a need for less-expensive and environmentally benign ...

The separation of pyrite and arsenopyrite is therefore required; however, the process is difficult. The present work employed the combination of sodium carbonate (Na 2 CO 3) and sodium humate (HA) as arsenopyrite depressants. In this regard, flotation tests, zeta potential measurements, adsorption tests and electrochemical measurements …

Based on these results, As atoms could be one of the active sites for the oxidation of arsenopyrite. In addition, separation of arsenopyrite and pyrite could be …

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 arsenopyrite (FeAsS). Ore flotation results indicate that H 2 O 2 has the …

The separation of valuable sulfide minerals, like galena [3,4], chalcopyrite [5], sphalerite [6,7] and pyrite [8, 9] from arsenopyrite is very important because arsenic is a penalty element in ...

Chen et al. (2019) achieved separation of pyrite from arsenopyrite and suggested oxidation of dixanthogen to monothiocarbonate ion for arsenopyrite depression, contrary to Vreugde (1982). From Fig. 6, the depression of arsenopyrite was independent of the reagent addition sequence for our investigated conditions. It is, however, not clear ...

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 …

Chen et al. researched the depression behavior of S-7261A on the selective separation of arsenic-containing copper sulfide minerals, and they found that S-7261A exhibited excellent selective depression ability on pyrite and arsenopyrite for the selective separation of arsenic-containing copper sulfide minerals (Liao et al., 2022).

A froth flotation process for effecting separation of arsenopyrite mineral from pyrite mineral comprising conditioning at pH less than 8 and at a temperature of at least 30 0 C an aqueous pulp containing particles of said arsenopyrite and pyrite minerals, the conditioning being conducted with a sulfitic depressing agent providing HS0 3 O ions ...