1994. iron magnetic properties and magnetic signatures of blfs of the hamersley basin and yilgarn block, western australia. aseg extended abstracts vol. 1994, geophysical signatures of west australian mineral deposits, pp. 341354.
Effect of microwave pretreatment on the magnetic properties of iron ore and its implications on magnetic separation. separ purif tech. 201413622332. the main disadvantage of thermally assisted release is the fact that the balance of energy input required to reduce the force contained in the ore is greater than the reduction in milling energy.
Hamersley iron is a wholly owned subsidiary of rio tinto. view the full record at encyclopedia of australian . pilbara iron wikis the full wiki all iron ore mined at the sites is transported by one of the worlds largest privately owned railroads to either the port of dampier, western australia or cape lambert near wickham, western australia.
Hamersley province 1. introduction the whaleback iron ores are called martitemicroplaty hematite ore or mmpl h ore. the microplaty form of hematite is a diagnostic feature of these ores. these ores only occur in openpit tens to hundreds of.
Hamersley province hamersleys, experience has shown that the basic concepts apply to bifhosted ores worldwide. major ore types although the dominant world resources of iron ore are associated with the major late archean proterozoic bif depositories, ores are known from the whole gamut of these chemical sediments.
Iron ore in general iron ore is a mineral substance which will yield metallic iron fe at a profit. the primary forms of which are magnetite fe 3 o 4 and hematite fe 2 o 3. iron ore is the source of primary iron for the worlds iron and steel industries. almost all iron ore 98 is used in steelmaking. iron ore is mined in about 50.
Journal of applied mathematics and physics jamp journal information subscriptions the journal of applied mathematics and physics online at scientific research publishing, www.scirp.org is published monthly by scientific research.
Kalgoorlie, the iron ore deposits of the hamersley asin, the heavy mineral sands at enneabba. the resulting publication, geophysical signatures of western australian mineral deposits, has sold around 1000 copies, i.e. its entire print run and only a few copies are still available. since the 1994 publicationsession case study.
Magnetic mineralogical characteristics of hamersley iron ores in western australia j. appl. math. phys. , 3 2015 , pp. 150 155.
Magnetic mineralogical characteristics of hamersley iron ores in western australia the predominant magnetic mineral in the ironformation is.
Magnetic mineralogical characteristics of hamersley iron ores in western australia this paper presents the research outcomes of a magnetic mineralogical study on hamersley iron ores. thermal magnetic analysis shows that typical highgrade martitemicroplaty hematite or m mpl h and martitemicroplaty hematitegoethite or mmpl hg ores contain a small amount of.
Magnetic mineralogical characteristics of hamersley iron ores in western australia. figures. . some generalised properties of ferromagnetic minerals. . thermochemical reactions involving magnetic minerals. thermal susceptibility curve citations 2 references 21.
Magnetic petrophysics and density investigations of the hamersley province, western australia implications for magnetic and gravity interpretation jan 1999 w w guo.
Magnetic separation mineral technologies wet high intensity magnetic separatorinduced roll magnetic separatorsrare earth magnetic separatorslow and medium intensity magnetic separators the whims range includes 4, 16, 24 and 48 pole machines with either 68 or 120 millimetre separation matrix widths whims separators are suitable for applications requiring.
Microscope studies of a wide range of ores and fresh, oxidized, or partly ironenriched, banded ironformation bif have shown a consistent sequence of alteration of the primary constituents, chert, magnetite with or without hematite, carbonates, and silicates, leading to the formation of martitehematitegoethite ores which form the bulk of the reserves of the hamersley iron.
Ores of the hamersley area in australia and to a minor extent in india and south america, mimetic replacement of gangue minerals by iron hydroxyoxides is a major factor in forming supergene iron ore from banded ironformation bif and results in the superb preservation of the original bif features.
Physiochemical, mineralogical, and isotopic characterization of magnetiterich iron oxides formed by thermophilic ironreducing bacteria.
Recognised that, in general, iron ores are less magnetic than the bifs, but condent interpretation of magnetic data requires a good understanding of the magnetic properties of the different lithological units in the area of interest. in the hamersley basin, several studies related to magnetic petrophysics were conducted before this study.
Rock magnetic properties and palaeomagnetism of weakly metamorphosed bandediron formations bifs of the palaeoproterozoic hamersley group, western a.
The hamersley iron resources, contained in banded iron formations of precambrian age, cover extensive areas of the pilbara region. haematite is the principal iron mineral. in the first quarter of 2010 proven and probable reserves at hamersleys pilbara operations yielded 3,344mt of.
The origin of the iron oxides in archean and paleoproterozoic banded iron formations bifs is still a debated question. we report low and high temperature magnetic properties, susceptibility and saturation magnetization results joined with scanning microscope observations within a 35 m section of the late archean boolgeeda iron formation of the hamersley group, western.
The predominant magnetic mineral in the ironformation is hematite but a small amount of magnetite also is present in some samples. stepwise thermal demagnetisation was conducted for 263 specimens.
The reduction sample was subjected to magnetic separation and a nonmagnetic product aluminum concentrate, with alumina recovery of 80.64 and iron removal of 85.32, was obtained. such a nonmagnetic product could be used as a raw material for the bayer process in the alumina production industry, while the magnetic product could be used as a.
This paper presents the research outcomes of a magnetic mineralogical study on hamersley iron ores. thermal magnetic analysis shows that typical highgrade martitemicroplaty hematite or m mpl h and martitemicroplaty hematitegoethite or mmpl hg ores contain a small amount of original magnetite.
Title magnetic mineralogical characteristics of hamersley iron ores in western australia. authors william w. guo. keywords thermal magnetic analysis.
Types of iron ore magnetite. with the chemical formula fe3o4, magnetite ore has much lower iron content than hematite ore. that means it has to be concentrated before it can be used to produce steel. however, the ores magnetic properties help separate magnetite ore from rock during concentration.
While the basic mineralogical understanding of iron ores is well established, there is a considerable lack of knowledge of the more detailed crystal structure, chemistry, magnetic, and physical mineral properties between the end members and variants of many ironbearing ore minerals.