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Coalbased reduction and magnetic separation behavior of lowgrade vanadiumtitanium magnetite pellets were studied in this paper it is found that the metallization degree increased obviously with an increase in the temperature from 1100 c to 1400 c the phase composition transformation was specifically analyzed with xray diffraction xrd
Following process of magnetic separation consequently it is important to carry out the present study due to the researching margin of lgvtm and the promising direct reductionmagnetic separation technique in this study the coalbased reduction and magnetic separation behavior of
Nevertheless collection separation culture and domestication of leaching bacteria are timeconsuming which restricts its application in the mineral industry in recent years magnetic roasting and coalbased reduction of oolitic hematite ores followed by magnetic separation
In this paper mineralogy of a siderite lump was studied a process of coalbased direct reductionmagnetic separation of the siderite lump sample was proposed and process parameters have been optimised it is shown that the final sponge iron powder assaying 9240 of fe and 9228 of metallisation degree was manufactured with iron recovery
In this paper coalbased reduction on flotation middling from iron ore containing carbonate at donganshan was studied during which the effect of reduction temperature reduction time co mole ratio and feed layer thickness on reduction process were carried out the results showed that the optimal reduction conditions required a temperature of 1250ca duration of 70min a co mole ratio
Iron recovery from a lead slag in henan province was carried out with the technique of coalbased direct reduction followed by magnetic separation scanning electron microscopy sem was used to investigate the transformation of ironcontaining minerals and the particle size of metallic iron generated by coal reduction the results showed that technique is feasible for iron recovery from the
Coalbased direct reduction of nickel slag and magnetic separation of iron are effective methods of secondary resource utilization the growth characteristics of metallic iron particles in this process are of great significance for subsequent grinding and magnetic separation process the nickel slag is mixed with coal powder and other additives in a certain proportion and then subjected to a
Refractory iron ores and solid wastes are always disposed through coalbased direct reduction followed by magnetic separation which has been comprehensively investigated in the process of coalbased direct reduction followed by magnetic separation with coal as a reductant metals are reduced to elementary
The reduction behavior of lowgrade lump hematite ore 100 2050 mm has been evaluated by performing a series of coalbased direct reduction roasting tests followed by magnetic separation
Magnetizing roasting or direct reduction followed by magnetic separation has been demonstrated to be effective for iron recovery from solid wastes in this study recovery of iron from vanadium tailings with coalbased direct reduction followed by magnetic separation is investigated
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A technique with coalbased direct reduction followed by magnetic separation is presented in this study for recovering and reusing iron otherwise wasted in vanadium tailings
May 23 2013 this paper reports the recovery of iron from high phosphorus oolitic iron ore using coalbased reduction and magnetic separation the influences of reduction temperature reduction time co mole ratio and cao content on the metallization degree and
Reduction behaviors of feov2o3 and feocr2o3 resulting in very low recoveries of vanadium and chromium during magnetic separation however at higher ncnfe the reduction rates of feov2o3 and feocr2o3 increase significatly because of
This paper explores the effects of reductant type flux reduction temperature and reduction time on coalbased direct reduction of iron ore tailings a series of tests were designed and implemented on ore tailing samples containing 1451 of iron
Coalbased reduction and magnetic separation behavior of lowgrade vanadiumtitanium magnetite pellets were studied in this paper it is found that the metallization degree increased obviously with an increase in the temperature from 1100 c to 1400 c the phase composition transformation was specifically analyzed with xray diffraction xrd
Magnetic separation 1112 however most of these studies focused on the conditions during reduction and magnetic separation the reduction mechanisms especially the growth of metallic particles which is essential in separating feni metallic iron phase and in controlling the reduction process have not yet been
Additionally with respect to metalizing reduction and magnetic separation the rational parameters include a magnetic field intensity of 50 mt a reduction temperature of 1350c a reduction time of 60 min and a carbon ratio of 12
The reaction behavior of iron minerals and growth of metallic iron particles in coalbased reduction of an oolitic iron ore were investigated by xray diffraction xrd and scanning electron microscopyenegry dispersive spectroscoy semeds respectively the results show that the reduction of iron minerals occurred in the sequence of fe2o3 fe3o4 feo fe during the reduction the
Coalbased direct reduction followed by magnetic separation technique was employed to produce direct reduction iron powder dri powder from a highphosphorus oolitic hematite ore and the effects of type and particle size of coal and co fixed carbonoxygen mole ratio on this process were investigated the
After grinding and magnetic separation a concentrate with 7218 fe tot was obtained keywords dq zhu et al research of superfine low grade hematite by coalbased direct reductionlow intensity magnetic separation metal mine 22012 6062 66 google scholar 6
Abstract coalbased reduction and magnetic separation behavior of lowgrade vanadiumtitanium magnetite pellets were studied in this paper it is found that the metallization degree increased obviously with an increase in the temperature from 1100 c to 1400 c
The reduction behaviors of feov 2 o 3 and feocr 2 o 3 during coalbased direct reduction have a decisive impact on the efficient utilization of highchromium vanadiumbearing titanomagnetite concentrates the effects of molar ratio of c to fe ncnfe and temperature on the behaviors of vanadium and chromium during direct reduction and magnetic separation were investigated
Jul 11 2018 preparation of ferronickel from nickel laterite via coalbased reduction followed by magnetic separation enrichment of nickel and iron from nickel laterite orecoal composite pellets by deep reduction and magnetic separation j univ sci technol beijing 332011 3
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