Green extraction of nickel and valuable metals from pyrrhotite …

Two pure pyrrhotite samples were obtained from the University of Tehran Mineralogy laboratory. Bulk samples were crushed by a laboratory cone crusher (Notashsanat Co, Iran) and dry-milled to −100 μm. Particle size distribution was determined via a laser particle sizer (Fraunhofer Hydro, 2000S), and the results are shown in Fig. S1a. X-ray ...

Electrochemical and XPS investigations on the galvanic …

Pyrrhotite (Po, Fe 1-x S) is the dominant iron sulfide in Cu-Ni sulfide deposits with abundant PGM (platinum group minerals) ... The massive samples were crushed to −1 mm in a laboratory roll crusher and then ground using a ceramic ball mill to the desired size fractions. The ground pentlandite particles were purified using a dry magnetic ...

Nanostructured pyrrhotite supports autotrophic denitrification …

Natural pyrite was obtained from Xinqiao Mine of Tongling City, Anhui Province, China, crushed in a jaw crusher, and sieved into particles of 250–425 µm.The pyrite particles were washed, by soaking in a 1% (v/v) HCl solution for 48 h, to remove any carbonate and iron oxide films formed on the surfaces.Particles were then rinsed with deionized water until a pH of 7 …

Copper Ore Processing Solution

Jaw crusher is mainly used for medium size crushing of various ores and bulk materials. It can crush materials with a compressive strength of up to 320Mpa, divided into two types: coarse crushing and fine crushing. ... Magnetic …

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Pyrrhotite oxidation and its influence on alkaline amine flotation

The pyrrhotite material was handpicked from an 80 cm thick massive lense of sulphides in the open pit of the Akselberg deposit, and subsequently crushed using a jaw crusher with 3 mm discharge opening. To minimise the degree of oxidation of the particle surfaces, the crushed material were stored in a freezer until used in the experiments.

Cyanidation of a pyrrhotite-bearing gold ore

Effect of lead nitrate addition on the leaching of a pyrrhotite-bearing gold ore (Cyanidation: pH 11.2, 380ppm NaCN, 8ppm O 2, 32h) Figure 5 illustrates the reaction of cyanide with chalcopyrite ...

Pyrrhotite and Crumbling Concrete

The map and explanatory text titled Pyrrhotite Distribution in the Conterminous United States, 2020 [Fact Sheet 2020-3017] summarizes what is currently known about the distribution of pyrrhotite across the country. In areas …

Pentlandite (pn)

It is typically associated with pyrrhotite, as a late mineral that forms fine elongated inclusions (pentlandite flames—flaming bodies arranged along microcracks in pyrrhotite) or anhedral inclusions of various shapes, irregular, cordate, banded, interstitial or small masses occasionally (Fig. 93.2).

Pyrrhotite in concrete causes crumbling …

Hidden within the concrete of house foundations, pyrrhotite can, over time, turn the rock-solid base of a home into a crumble of material that turns to rubble in the hand. The presence of...

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The Separation of Pentlandite from Chalcopyrite, Pyrrhotite …

In sulfide nickel deposits throughout the world, pentlandite and pyrrhotite are commonly found together along with varying amounts of chalcopyrite and platinum group minerals (PGMs). The mafic or ultramafic host silicates associated with the sulfide mineralisation commonly exhibit a complex assemblage of magnesium bearing silicates, many of which themselves contain …

An overview of chalcophile element contents of pyrrhotite

We have compiled the trace element concentrations in pyrrhotite, pentlandite, chalcopyrite, and pyrite from magmatic Ni-Cu-PGE ore deposits with the aim of understanding their petrogenesis and whether these minerals can be used as indicator minerals. Among the samples, there are some of the most studied world-class Ni-Cu- (Aguablanca, Duluth, Jinchuan, Noril'sk-Talnakh …

Bio-oxidation behavior of pyrite, marcasite, pyrrhotite, and

The oxidation of sulfide minerals is of central importance due to the acid mine drainage (AMD) production. The bio-oxidation of pyrrhotite, pyrite, marcasite, and arsenopyrite was carried out with mesophilic bacteria (Acidithiobacillus ferrooxidans, A. thiooxidans, and Leptospirillum ferrooxidans) at 34 °C for 30 days.Bio-oxidation tests showed that marcasite has …

FLOTATION OF PYRRHOTITE FROM MAGNETITE ORES – A …

Liberation for both pyrrhotite and pyrite improves considerably as the particle size decreases, with 92 percent of the pyrrhotite in the size fraction 0.3-0.106 mm occurring in the form of fully ...

Pyrrhotite : Magnetic Cousin of "Fool's Gold"

Use jaw crusher and cone crusher to crush the raw pyrrhotite ore, and use a vibrating screen to reduce the material particle size to less than 20 mm. Grinding: The crushed minerals are ground into finer mineral powder using a …

Evaluation of Ni-Cu Ore from Zapolyarnoe Based on …

Magnetite was also highly locked with pyrrhotite in the fraction below 125 µm (2.36%). For pyrrhotite, the liberation degree was lower than those of valuable minerals, at 35.55% in the fraction smaller than 125 µm (Figure 16d). An important relation in binary particles is the association with pentlandite, which reached 26.15% for the 180/355 ...

Nutrient removal through pyrrhotite autotrophic …

Obtained from a mine located in Tongling City, Anhui Province, China, pyrrhotite (Fe 56.69%, S 38.46%) was pulverized in a jaw crusher and sieved into particles of 0.6–1.18 and 1.7–4 mm for batch and biofilter experiments respectively.

Pyrrhotite oxidation and its influence on alkaline amine …

The pyrrhotite material was handpicked from an 80 cm thick massive lense of sulphides in the open pit of the Akselberg deposit, and subsequently crushed using a jaw …

Method of separating pyrrhotite from chalcopyrite and …

In the practice of my inventi0nsay, for instance, for the separation of the pyrrhotite from the chalcopyrite of the ores at the Elizabeth mine, South Strafford, Vermontthe ore Will first be roughly crushed in a Blake rock-crusher and then further reduced by rolls to pieces of about fivc-eighths of an inch in thickness.

FLOTATION OF PYRRHOTITE

Pyrrhotite is an iron bearing sulphide mineral that can be considered as ... sample was crushed on a laboratory jaw crusher to 100 percent passing 1 mm and split into representative aliquots.

(PDF) Bioleaching of Pyrrhotite with Bacterial Adaptation …

In a comparative study on the bioleaching pyrrhotite at PZC 3.0 for direct bacterial oxidation (pH 3.2) and direct/indirect bacterial oxidation (pH 2.8), the maximum leaching concentration of Fe ...

Exploring the effect of pulp aeration and lime-aid grinding …

Pyrrhotite is the most abundant iron sulfide mineral in nature after pyrite [1]. It exists in sulfide deposits and closely associate with chalcopyrite, pyrite, pentlandite and other sulfide minerals [2]. ... Laboratory jaw crusher and porcelain ball mill were used to crush and reduce sample size. Standard sieves were finally used to classify ...

FLOTATION OF PYRRHOTITE

Bench flotation experiments on a skarn-type magnetite ore from Kazakhstan containing 2.0 to 3.5 percent sulphur were performed to systematically investigate the flotation behaviour of …

Exploring the effect of pulp aeration and lime-aid grinding …

In commercial flotation production, pyrrhotite is an important sulfide gangue for pyrrhotite-rich type copper sulfide ore, and it can pose significant negative impact on the …

Preventing Pyrrhotite Damage in Concrete

quantify pyrrhotite content down to 0.05% by mass level with the latest silicon drift detectors and high-resolution XRD units with synchrotron radiation. Wavelength dispersive XRF technique …

The Humboldt Mill: A Brief History

The original primary crusher building still stands on the hill behind our COSA. Though it is not used in our process today, it remains a repository for historical core samples from both Humboldt and Ropes mines. ... it was obvious that the pyrrhotite contained in our ore was a concern. When pyrrhotite, an iron sulfide mineral, is stagnant it ...

The colouring effect of pyrrhotite and pyrite on micronised …

The pyrite and pyrrhotite samples were crushed using a jaw crusher with 3 mm opening and milled using a Fritsch P6 Pulverizette planetary mono mill at 400 rpm for 60 s. All further sample treatment and processing were conducted on the 45–100 μm particle size fraction, which was obtained from the mill product by dry sieving.

Impact Crushing Characteristics and Relationship …

Based on the JK Drop Weight test and principle of selective crushing, a multicomponent complex ore with its component minerals, i.e., pyrrhotite, sphalerite, and quartz, was used to explore the impact crushing …

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Magnetic separator,Wet magnetic separator,Magnetic …

Magnetic separators are available in cyclic design with processing vessel diameters smaller than 3mm. Wet Magnetic Separator is one kind of efficient equipment for processing fine, feebly magnetic minerals, such as hematite, limonite, wolfram, ilmenite, and tantalum-niobium, etc.In recent years, it is also more and more applied in purifying quartz, feldspar and nephline.

Flotation of pyrrhotite and pyrite in saturated CaCO

As shown by Bunkholt and Kleiv, 2013, Bunkholt and Kleiv, 2014, the colouring effect of pyrrhotite and pyrite causes a detrimental decrease in GCC brightness, even when these minerals are present at very small concentrations (<0.05 wt%). With the continuous improvements of GCC slurries into more specialised products, the tolerance for contaminating sulphides will …

A comparative investigation of the degradation of pyrite and pyrrhotite …

In all three cases reveal that pyrrhotite is degraded more than pyrite.Despite the limitations in the representativity of this study in such a huge context, the results of this study permit some ...

AN OVERVIEW OF CHALCOPHILE ELEMENT CONTENTS OF PYRRHOTITE…

Pyrrhotite with smaller equal proportions of chalcopyrite and pentlandite and minor PGM are typical of the fresh ore assemblage in the primary deposit. Weathering has produced a ~3 m thick gossan ...

Simultaneous nitrate and phosphate removal from …

Pyrrhotite (obtained from Tongling City, Anhui Province, China) was fragmented in a jaw crusher and sieved into particles of 2.36–5.12 mm in size. Pyrrhotite particles were placed in a 10% (v/v) HCl solution for 2 h for the removal of oxides formed on the surface, and rinsed with deionized water until the pH of the rinse reached 7 ± 0.1.

Cyanidation of a pyrrhotite-bearing gold ore

containing pyrrhotite as the primary sulphide, at a present throughput of 3,650t/d. The ore is crushed in two stages, using a 1m x 1.4m jaw crusher and 2.1m super heavy-duty cone crusher. The -1.9cm fine ore is ground in a conventional rod and ball mill circuit. Gold is recovered by gravity separation prior to cyanidation.

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An overview of chalcophile element contents of …

An overview of chalcophile element contents of pyrrhotite, pentlandite, chalcopyrite, and pyrite from magmatic Ni-Cu-PGE sulfide deposits Eduardo T. Mansur1 & Sarah-Jane Barnes1 & Charley J. Duran1,2 Received: 14 April 2020 /Accepted: 31 August 2020 # Springer-Verlag Germany, part of Springer Nature 2020 Abstract

Study on Impact Crushing Characteristics of Minerals Based …

In order to quantitatively analyze the impact crushing characteristics of mineral components in ores, this paper takes pure mineral quartz, pyrrhotite, and pyrite as the …