The separation of fine sulfides becomes increasingly difficult at fine particle sizes. Potential fine size separation methods are froth flotation and magnetic separation. The mineral sulfides, with the exception of pyrrhotite, are either weakly paramagnetic (e.g. chalcopyrite
Again, it is the high magnetic induction available in the SPHGMS separator that contributed to the significantly strengthened magnetic force upon fine chalcopyrite minerals and consequently to the high recovery from slurry, while maintaining a high separation selectivity to the minerals, due to the pulsation effect in the SPHGMS process
4 MAGNETIC SEPARATION OF SULPHIDE MINERALS range of variation in susceptibility demon- strated by the various sulphides. COPPER-FLOTATION PLANTS Macuchi, Ecuador At the mill of the Cotopaxi Exploration Co., Macuchi, Ecuador, the principal minerals are chalcopyrite, pyrite, barite, and quartz. The ore contains considerable
The microwave radiation is used intensification of magnetic separation and leaching of Cu-ores. The thermic decomposition as a result of interaction between microwave radiation and sulphidic minerals makes possible the magnetic separation of weakly magnetic chalcopyrite and tetrahedrite.
In mineral processing, low intensity magnetic separation (LIMS) and high intensity magnetic separation (HIMS) are used or WHIMS when carried out wet. The magnetic field of LIMS is ∼1000 gauss using permanent magnets, while the high-intensity units require an electromagnet to reach the higher fields of up to 20,000 gauss 1.
Magnetic Properties and Separation Potential Wet, high-intensity magnetic separation (WHIMS) was considered as a poten tial method for removing the cobalt-nickel mineral from the chalcopyrite con centrate. In anticipation of such tests, the magnetic susceptibilities were
Chalcopyrite has a relatively simple structure of the ZnS type and also a diamond lattice. Carbon forms four tetrahedral covalent bonds and in the diamond crystal every atom is bonded with four neighbours with equal spacing, and the bond continues through the entire crystal. Magnetic and Electrostatic Separation. In Mineral Processing
Electrostatic separation offers a means of reducing the silica and other objectionable constituents of the gravity-mill concentrates. Zinc-blende usually occurs in mechanical association with pyrite or marcasite, chalcopyrite, galena, and one or more gangue-materials.
Chalcopyrite is the most important and major source of copper metal. It is widely spread copper–iron sulfide mineral with stone formula (CuFeS 2).The color is typically brass to golden-yellow (Fig. 1.15), often tarnished, with greenish-black streak and submetallic luster.The hardness varies between 3.5 and 4.0 on the Mohs scale.
One rejects primarily monoclinic pyrrhotite that is magnetic. After a secondary FLOTATION OF CHALCOPYRITE, PENTLANDITE, PYRRHOTITE ORES 1 1 magnetic separation and regrinding to liberate most of the chalcopyrite and pentlandite, a two stage flotation separation is done to produce a "copper- nickel concentrate" before the pyrrhotite is rejected.
Chalcopyrite ore dressing equipment processing technology mainly adopts the advanced processes: flotation, magnetic separation, or wet smelting method, etc. Smelting of copper ore smelting process are mainly smelting, wet smelting. According to mineral raw materials properties and harmful components such as zinc, arsenic and fluorine, and
The changes of magnetic property of several iron bearing sulfide minerals after strong beam current electron irradiation are examined. Data shows that the magnetic susceptibility of arsenopyrite and chalcopyrite increases markedly compared to that of pyrite and marmatite. The magnetic susceptibility of arsenopyrite exceeds the lowest ferromagnetic limit 3000 cm3/g, while the susceptibility
The effects of microwave treatment on the floatabilities and magnetic susceptibilities of some sulfide minerals, namely, pyrite, chalcopyrite, galena and sphalerite, were studied. Pure mineral samples were prepared in -425+212-μm, -212+106-μm and -106+38-μm size fractions. Microflotation and magnetic separation tests were curried out on the samples after microwave treatment at 600, 950 and
Marrs, G, 2014. The separation of pentlandite from chalcopyrite, pyrrhotite and gangue in nickel projects throughout the world, in Proceedings 12th AusIMM Mill Operators’ Conference 2014, pp 153–162 (The Australasian Institute of Mining and Metallurgy: Melbourne).
MAGNETIC SUSCEPTIBILITY OF MINERALS IN HIGH MAGNETIC FIELDS By D. C. Dahlin 1 and A. R. Rule2 ABSTRACT The U.S. Bureau of Mines investigated the magnetic susceptibility of minerals as a function of mag netic field strength to determine how it might affect the potential for high-field magnetic separation as
Abstract: Superconducting magnetic separation of chalcopyrite and molybdenite was studied, along with the effects of the magnetic flux density, slurry concentration, and pulsation amplitude on the separation. According to the force equilibrium model of magnetic particles that accumulated on
Copper ore divides into ore sulfide ,ore oxide and mixing ore according to its oxide rate . The main process for copper ore is flotation,for refractory mixed copper ore and refractory oxide ore,normally use hydrometallurgy process .It is a high technological enterprise that integrated research,manufacture, sales and service . The company has multiple subsidiaries such as Mineral
After separation of the magnetic products at low intensity, the remaining sample was fed into a magnetic separator adjusted to a slightly higher magnetic intensity to conduct further separation tests. The magnetic separation tests were carried out sequentially in this manner until the magnetic
Abstract: Superconducting magnetic separation of chalcopyrite and molybdenite was studied, along with the effects of the magnetic flux density, slurry concentration, and pulsation amplitude on the separation. According to the force equilibrium model of magnetic
Techniques for Iron Recovery from Chalcopyrite (CuFeS 2 ): A Review N. Poloko and Dr. G. Dahna Magnetic separation. A combination of the two methods is effective. Keywords Chalcopyrite, Fayalite, direct reduction, beneficiation, Magnetic separation
Superconduction was firstly combined into pulsating high gradient magnetic separation (PHGMS) technology to improve its separation performance for ultrafine magnetic particles. In this investigation, the superconducting PHGMS (SPHGMS) process was theoretically described and a cyclic pilot-scale SLon-CD100 superconducting PHGMS (SPHGMS) separator with magnetic
High Gradient Magnetic Separation of small (5-38 µm) weakly magnetic copper mineral particles from a copper concentrate and ore has been performed. In previous work coarser fractions of these minerals, bornite and chalcopyrite, were separated successfully. The recovery of the smaller particles in the magnetic
strongly magnetic minerals of Fe, Co and Ni as well as less magnetic minerals such as rare earths which normally are not regarded as treatable by magnetic processes. Even weakly, para-magnetic materials can be processed by the HGMS including separation of galena, chalcopyrite