Magnetic Separation Of Pyrrothite In Flotation Cell

Flotation of pyrrhotite to produce magnetite concentrates ...

2013-09-01· For pyrrhotite flotation in the presence of air and oxygen the critical pH is between 4.5 and 4.65 (Chang et al., 1954). ... each mineralisation was split and used for bench-scale variability tests which investigated the sample’s response to magnetic separation and flotation. The remaining samples from each deposit were combined to form a blended sample for both bench and pilot testing. The ...

(PDF) FLOTATION OF PYRRHOTITE FROM MAGNETITE …

comprised of 3x 50-ltr and 1x 20-ltr mechanical flotation cells. After regrinding the . rougher concentrate in a se condary ball mill to a d 80 of 37 to 46 µm, a cleaner . ISSN 2176-3135. 1940 ...

The Desulfurization of Magnetite Ore by Flotation with a ...

However, the magnetic separation of pyrrhotite from magnetite is problematic, ... The rougher and cleaner of the industrial experiment system are composed of 6 and 4 units of 40 m 3 flotation cells, respectively. The scavenger consists of 4 units of 4 m 3 flotation cells. The flotation conditions of industrial tests are also described in Figure 2. The processing capacities of S1 and S2 were ...

Pyrrhotite - an overview | ScienceDirect Topics

G.V. Rao, in Encyclopedia of Separation Science, 2000 Developments in Flotation Flotation of Nickel Sulfide Minerals Collectorless flotation. It is known that chalcopyrite and pyrrhotite can be floated without collectors at electrode potentials of +400 mV and +50 mV respectively, and pyrite does not float even at +700 mV. The underlying mechanism causing hydrophobicity, although obscure, is ...

The Desulfurization of Magnetite Ore by Flotation with a ...

However, the magnetic separation of pyrrhotite from magnetite is problematic, due to their similar magnetic property and magnetic flocculation between pyrrhotite and magnetite [3]. Flotation has been commercially used as a method for removing pyrrhotite from magnetite for high sulfurous iron ores [4]. In this process, pyrrhotite as a primary impurity is separated from iron ore using typically ...

Electrochemical & Magnetic Interactions in Pyrrhotite ...

Grinding in steel mills adversely affects the flotation removal of pyrrhotite from magnetite ores. To elucidate the effect of grinding media on the floatability of pyrrhotite, rest potential and short-circuit current measurements were made on electrode combinations of pvrrhotite-mild steel and pyrrhotite-stainless steel. Galvanic contact of pyrrhotite with mild steel increased the rate of ...

CHAPTER 3 COMPARISON OF DIFFERENT PYRRHOTITE DEPRESSANTS ...

collect magnetic pyrrhotite on the magnet. This process was repeated until the magnet did not remain any more pyrrhotite. In this way, about 300 g of mineral was removed from the slurry. c. Flotation : A Denver laboratory flotation machine with a 4 L cell was used in all flotation tests. The rotation speed of the agitator was set at 1500 rpm. The

The Desulfurization of Magnetite Ore by Flotation with a ...

However, the magnetic separation of pyrrhotite from magnetite is problematic, due to their similar magnetic property and magnetic flocculation between pyrrhotite and magnetite [3]. Flotation has been commercially used as a method for removing pyrrhotite from magnetite for high sulfurous iron ores [4]. In this process, pyrrhotite as a primary impurity is separated from iron ore using typically ...

The Flotation Characteristics of Magnetic/4C (Fe7S8) and ...

base metal mining operations, and presents many challenges in the separation/concentration of valuable base metal sulfides during froth flotation, especially pentlandite ((Ni,Fe) 9 S 8). It has several superstructures which are a result of its variable iron content, with these being separated into two main categories: magnetic/monoclinic pyrrhotite (Fe 7 S 8 {4C}) and non– magnetic/hexagonal ...

The Effect of Oxidation on the Flotation Behaviour of ...

Magnetic separators are used on scavenger concentrate to remove pyrrhotite. This magnetics fraction is reground to liberate pyrrhotite/pentlandite middlings, followed by flotation to selectively recover pentlandite. The non-magnetics fraction is thickened and floated in a single stage. Magnetics and non-magnetics concentrates report to the final nickel-copper concentrate which constitutes the ...

The Composition and Crystal Structures of Pyrrhotite: A ...

• Magnetic separation can only separate the magnetic pyrrhotite from the pentlandite concentrate • Flotation is used to remove pyrrhotite from the pentlandite concentrate. Microflotation Recovery of Pyrrhotite –pH 7. Microflotation Recovery of Pyrrhotite –pH 10. Merensky Pyrrhotite Electron Backscatter Images. Known Pyrrhotites • Troilite FeS (Evans, 1970) –Stoichiometric with a 2C ...

NICKEL AND COBALT ORES: FLOTATION

The monoclinic pyrrhotite, being magnetic, can be partly rejected by magnetic separation, while the hexagonal pyrrhotite is separated by Sotation. Pyrrhotite is known to Soat poorly in alkaline media; therefore the general practice is to selectively Soat pentlandite from pyrrhotite, by maintaining a highly alkaline pH with cyanide as depressant and using thiols like xanthates or ...

CTB (S/N) Series Magnetic Separator - Crushers, Ball Mills ...

CTB Magnetic Separator in our factory CTB (S/N) Series Magnetic Separator is mainly for wet separation of magnetite, pyrrhotite, roasted iron ore, titanomagnetite, etc. Category: Magnetic …

CHARACTERIZATION OF THIOSALTS

pyrrhotite-rich Cu-Ni ore from the Strathcona mill with the overall purpose to identify the processes, conditions and mineralogical characteristics that may influence the production of thiosalts during milling of sulphide ores. Experimental studies involved batch, semi-batch and continuous milling and flotation tests to (1) study the influence of pH, temperature and residence time, (2) assess ...

Magnetic separation - Wikipedia

Magnetic separation is the process of separating components of mixtures by using magnets to attract magnetic materials. The process that is used for magnetic separation detaches non-magnetic material with those that are magnetic. This technique is useful for not all, but few minerals such as Ferromagnetism/ ferromagnetic (materials strongly affected by magnetic fields) and paramagnetic ...

Magnetic Cell Separation | Cell Isolation Technology

Magnetic cell separation, also known as immunomagnetic cell separation or magnetic cell sorting, involves targeting cells for selection or depletion using antibodies or ligands directed against specific cell surface antigens. Labeled cells are cross-linked to magnetic particles, also known as magnetic beads, that can be immobilized once an electromagnetic field is applied. Due to its speed and ...

Studies of structures and phase transitions in pyrrhotite

Ni/Cu ores from pyrrhotite has been central to the metallurgy of Ni and Cu [10. 11]. Figure 1 is a flowsheet showing the separation process performed in Inco as well as other Ni/Cu producers. As can be noted, two of the most important steps— the magnetic separation and froth flotation— depend critically on the structural characteristics of

The Composition and Crystal Structures of Pyrrhotite: A ...

• Magnetic separation can only separate the magnetic pyrrhotite from the pentlandite concentrate • Flotation is used to remove pyrrhotite from the pentlandite concentrate. Microflotation Recovery of Pyrrhotite –pH 7. Microflotation Recovery of Pyrrhotite –pH 10. Merensky Pyrrhotite Electron Backscatter Images. Known Pyrrhotites • Troilite FeS (Evans, 1970) –Stoichiometric with a 2C ...

NICKEL AND COBALT ORES: FLOTATION

The monoclinic pyrrhotite, being magnetic, can be partly rejected by magnetic separation, while the hexagonal pyrrhotite is separated by Sotation. Pyrrhotite is known to Soat poorly in alkaline media; therefore the general practice is to selectively Soat pentlandite from pyrrhotite, by maintaining a highly alkaline pH with cyanide as depressant and using thiols like xanthates or ...

Guidance for reporting tailings and waste rock: chapter 2 ...

Magnetic separation has been used in Canada to separate iron ore from waste minerals, to remove magnetite (iron oxide) and pyrrhotite (iron sulphide) from base metal ores prior to flotation, and to recover magnetite from copper concentrates. Like gravity separation, magnetic separation tends to require the use of smaller amounts of process reagents than some other ore separation methods.

CHARACTERIZATION OF THIOSALTS

pyrrhotite-rich Cu-Ni ore from the Strathcona mill with the overall purpose to identify the processes, conditions and mineralogical characteristics that may influence the production of thiosalts during milling of sulphide ores. Experimental studies involved batch, semi-batch and continuous milling and flotation tests to (1) study the influence of pH, temperature and residence time, (2) assess ...

FALCONBRIDGE IN SUDBURY: SULPHUR REDUCTION AT …

1991-05-03· The resulting concentrate is then subjected to magnetic separation and the two products, magnetics and non-magnetics, are treated separately. The non-magnetics carry residual copper values, nickel sulphides and gangue minerals and are upgraded by flotation to produce a low-nickel/low-copper concentrate and a final tailing. The magnetic product consists primarily of pyrrhotite, but the ...

Magnetic Cell Separation | Cell Isolation Technology

Magnetic cell separation, also known as immunomagnetic cell separation or magnetic cell sorting, involves targeting cells for selection or depletion using antibodies or ligands directed against specific cell surface antigens. Labeled cells are cross-linked to magnetic particles, also known as magnetic beads, that can be immobilized once an electromagnetic field is applied. Due to its speed and ...

Mineral processing - Concentration | Britannica

Mineral processing - Mineral processing - Concentration: Concentration involves the separation of 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 (gravity separation), magnetic ...

Magnetic separation - Wikipedia

Magnetic separation is the process of separating components of mixtures by using magnets to attract magnetic materials. The process that is used for magnetic separation detaches non-magnetic material with those that are magnetic. This technique is useful for not all, but few minerals such as Ferromagnetism/ ferromagnetic (materials strongly affected by magnetic fields) and paramagnetic ...

Froth flotation - Wikipedia

Formation of a stable froth on the surface of the flotation cell; Separation of the mineral laden froth from the bath (flotation cell) Simple flotation circuit for mineral concentration. Numbered triangles show direction of stream flow. Various flotation reagents are added to a mixture of ore and water (called pulp) in a conditioning tank. The flow rate and tank size are designed to give the ...

Location

CONTACT INFO