·Bauxite residueBauxite Residue BR BR has being extensively investigated as a secondary source of raw materials such as iron titanium and rare earth elements REE Another considered process option is the magnetic separation for iron concentration but it is only physically viable if coarser particles are major [6 7] BR alkalinity
·After drying and calcination the bauxite is subjected to magnetic separation Dey et al performed the beneficiation of low grade bauxite using magnetic separation for its use in refractories Rao et al studied the effect of pre treatment in separating ferruginous impurities from bauxite by magnetic separation technique
·The scope of this work is to develop and optimize a reductive roasting process followed by wet magnetic separation for iron recovery from bauxite residue BR
Bauxite sample of Jamnagar India is suitable for refractory applications after separation of iron minerals Different magnetic separators and intensities are studied on different treated samples
·Red mud is a waste material of the Bayer process for alumina production from bauxite ore Red mud is generally pumped to disposal in an artificial pond [] In addition to the vast area of the land occupied red mud pollutes water resources and leads to environmental issues [] because of its high alkalinity pH of 10 Leading to large economic losses red mud
Semantic Scholar extracted view of "Magnetic separation studies for a low grade siliceous iron ore sample" by R K Dwari et al Skip to search form Skip to main An attempt has been made in the present study to bene ficiate bauxite ore from Durgamanawadi minse of M/s NALCO to achieve a grade of the products conforming to refra ctory
·Magnetic Separation Introduction The differences in magnetic susceptibility can be utilized to separate a valuable mineral from its gangue through the magnetic separation method Similar to other materials minerals are generally classified into three main categories namely diamagnetic paramagnetic and ferromagnetic
·The removal of iron from an Indian diaspore sample was studied using magnetic separation and leaching techniques aided by an in depth mineralogical characterization study involving quantitative
The effect of the calcination temperature on magnetic separation was investigated using the permaroll magnetic separator The bauxite calcined at 800C was subjected to different magnetic intensities by using laboratory Boxmag Rapid belt magnetic separator size bauxite was reduced at 800C with 5% coke for 30 minutes
The magnetic separation consists of 3 outputs The magnetic which presents the ferromagnetic samples low magnetic which presents the low grade bauxite sample which still has high iron contents and non magnetic samples which is has relatively small iron contents Magnetic treatment prior to the leaching process was conducted
·Properties of self hardened CaO added bauxite residue pellets and their behavior in hydrogen reduction followed by leaching and magnetic separation for iron and alumina recovery
Bauxite sample of Jamnagar India is suitable for refractory applications after separation of iron minerals Different magnetic separators and intensities are studied on different treated samples
·Reduction roasting reduces hematite in bauxite residue to magnetite and subsequent magnetic separation results in a magnetic concentrate The magnetic separation product is not ideal and provides low separation efficiency 47 60% Fe grade 70 80% Fe recovery due to the formation of mixed oxides fayalite hercynite [19 20]
·Mineral Processing Magnetic and Electrical Separation 573 When the maximum magnetisation has been achieved a particle is saturated at In magnetic separation at field strengths used in mineral dressing all ferro magnetic minerals become saturated They include magnetic pyrrho tite magnetopyrite and ferrosilicon
·Properties of self hardened CaO added bauxite residue pellets and their behavior in hydrogen reduction followed by leaching and magnetic separation for iron and alumina recovery For magnetic separation tests a Davis Tube Dings Magnetic Separator Co The mineral processing laboratory IGP NTNU was operated in five magnetic
·Gibbsite type bauxite is the main material for alumina extraction by Bayer process globally while the iron in red mud is difficult to use for the high alumina content Therefore the efficient separation of iron and alumina is the premise for the resource utilization of red mud In this work the separation of iron and alumina in red mud containing % Fe and %
·The effect of magnetic field intensity reduction temperature reduction time mole ratio of fixed carbon to reducible oxygen FC/O and ore particles size on separation indexes was researched
·This will reduce alumina recovery decrease the filtration efficiency of the bauxite residue increase the consumption of caustic solution increase energy consumption and contaminate the alumina product 10 Therefore most studies have focused on the carbothermal reduction of IRB 11 12 or RM 13 14 15 followed by magnetic separation to obtain
·After magnetic separation the major phase in the magnetic fraction was magnetite while gibbsite and boehmite were the major phases in the non magnetic fraction minerals in bauxite Magnetic
·The removal of iron as magnetite from a high iron bauxite ore was investigated by carbothermal reduction and magnetic separation Thermodynamic calculations using HSC Chemistry 6·1 were utilised
Bauxite residue BR is major by product of the Bayer process for aluminium production and its accumulation confers environmental risk due to its high alkalinity and fineness The high Fe content and the BR abundance render it an attractive secondary source of iron with magnetic separation being the preferable beneficiation technique applied for quality upgrade In this
Abstract High iron bauxite ore is a typical unmanageable polyparagenetic resource and owns high comprehensive utilization value Separation of iron from fine particles of high iron bauxite ore by the process of metallized reduction and magnetic dressing was researched systemically The effect of magnetic field intensity reduction temperature reduction time mole ratio of fixed
