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WO2018018069A1 - Procédé métallurgique de valorisation de concentré minéral ferro-titanifère à l'aide de champs magnétiques dépendants du temps - Google Patents

Procédé métallurgique de valorisation de concentré minéral ferro-titanifère à l'aide de champs magnétiques dépendants du temps Download PDF

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Publication number
WO2018018069A1
WO2018018069A1 PCT/AU2017/050746 AU2017050746W WO2018018069A1 WO 2018018069 A1 WO2018018069 A1 WO 2018018069A1 AU 2017050746 W AU2017050746 W AU 2017050746W WO 2018018069 A1 WO2018018069 A1 WO 2018018069A1
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WIPO (PCT)
Prior art keywords
iron
time dependent
magnetic field
metallurgic process
titaniferous
Prior art date
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Ceased
Application number
PCT/AU2017/050746
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English (en)
Inventor
Chris Browne
Alastair Bauer
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Goondicum Resources Pty Ltd
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Goondicum Resources Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2016902992A external-priority patent/AU2016902992A0/en
Application filed by Goondicum Resources Pty Ltd filed Critical Goondicum Resources Pty Ltd
Priority to AU2017301099A priority Critical patent/AU2017301099B2/en
Priority to CN201780060135.9A priority patent/CN109789426A/zh
Publication of WO2018018069A1 publication Critical patent/WO2018018069A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
    • C22B34/1209—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by dry processes, e.g. with selective chlorination of iron or with formation of a titanium bearing slag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/32—Magnetic separation acting on the medium containing the substance being separated, e.g. magneto-gravimetric-, magnetohydrostatic-, or magnetohydrodynamic separation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents

Definitions

  • the present invention relates generally to upgrading of ore or mineral concentrate by elimination of iron impurities and specifically, but not necessarily entirely to, beneficiating a ferro- titaniferous mineral concentrate using induced electromagnetic fields to separate out iron content from the mineral concentrate, thereby upgrading the titanium content of titaniferous mineral concentrate.
  • the titaniferous mineral concentrate may contain significant quantities of iron content, for example, but not confined to, ilmenite, leucoxene, titano-magnetite and titaniferous iron sands.
  • Titanium occurs in nature as the mineral rutile, which consists predominantly of titanium dioxide with low levels of impurities and as various ferro-titaniferous minerals such as ilmenite, which consist of titanium dioxide in combination with ferrous and ferric iron oxides.
  • the titanium content of rutile can easily be extracted as either metal or as pigment grade, by what is known as the Chloride Route, which is a relatively simple process involving reaction of the rutile with chlorine gas. As rutile is low in impurities and the chlorine can be recovered and reused, this represents a relatively inexpensive one step process.
  • the titanium content of ferro-titaniferous minerals cannot be economically recovered using the Chloride Route, mainly due to the high iron content, but can be recovered in a form suitable for pigment manufacture by a process known as the Sulphate Route.
  • the Sulphate Route process involves 27 separate unit operations and thus has much higher operating costs than the chloride route. It also suffers from the inability to economically recover either the sulphuric acid reagent used in the titanium extraction or the high quantities of impurities, particularly iron, which are solubilised during processing. As a result, this route also suffers from high reagent and effluent disposal costs.
  • prior art reduction processes comprise the application of carbothermic iron reduction as a means of upgrading iron-bearing titaniferous mineral concentrates.
  • Carbothermic iron reduction involves either the use of rotary kilns to achieve reaction below the fusion point of the resultant titanium product ( ⁇ 1600°C), referred to herein as the low temperature process, or by use of electric arc furnaces to achieve reaction at high temperature (>1600 °C), referred to herein as the high temperature process, resulting in the fusion of all reaction products.
  • the low temperature process results in the iron being present in the reaction product as finely dispersed metallic particles. These iron particles must then be oxidised and removed by acid leaching in order to produce a suitably upgraded product, resulting in high operating and residue disposal costs.
  • the high temperature process allows for relatively simple removal of the resultant molten iron from the fused titanium product, as they form separate layers in the furnace.
  • the high temperature process involves high operating costs due to the need for higher temperatures, which must be generated by the use of electric power, and high maintenance costs resulting from the severe corrosive nature of the molten titanium product ("slag") on furnace linings.
  • slag severe corrosive nature of the molten titanium product
  • the Magri process decreases the flow point or the viscosity of the elementary iron formed so that a very large part of this iron flows from the ore and coalesces into spheroids or a pool which are removed from the titaniferous phase by physical means.
  • US20090324440 Al (Marsh) (D2) discloses an extractive metallurgical process for the chemical reduction of an iron-containing ore or concentrate characterised in that the ore or concentrate is exposed to microwave (MW) energy and radio frequency (RF) energy concurrently with heating of the ore or concentrate, the MW and RF energy levels being selected so that there is little or no additional heating of said ore or concentrate.
  • MW microwave
  • RF radio frequency
  • K. G. Anisonyan, G. B. Sadyhov, T. V. Olyunina, T. V. Goncharenko, L. I. Leon, "Magnetizing roasting of leucoxene concentrate", Russian Metallurgy (Metally), July 2011, Volume 2011, No. 7, pp 656-659 (D3) discloses magnetizing roasting leucoxene in the temperature range 600- 800°C, only iron oxides are reduced to a metallic state.
  • CN 1775368 A (WUHAN TECHNOLOGY UNIV, et al. ) 24 May 2006 (D4) discloses obtaining iron slag from titanium ore by calcining and subsequent magnetic separation.
  • CA 2302712 Al (COUNCIL SCIENTIFIC & INDUSTRIAL RESERARCH [IN]) 24 October 2001 (D6) discloses preparation of synthetic rutile from ilmenite comprising smelting metallized ilmenite by arc plasma followed by grinding, oxidizing, leaching, filtering, washing and drying titania separated from pig iron.
  • an apparatus for upgrading ferro- titaniferous mineral concentrate comprising more than 10% by weight of iron content calculated as FeO, using a time dependent magnetic field at temperatures below the flow point of the titaniferous phase of the mineral concentrate, the apparatus comprising; a time dependent magnetic field source controller for controlling the time dependent magnetic field source to control the reduction of the iron content wherein the time dependent magnetic field is used to contribute to the reduced iron content coalescing into iron spheroids.
  • the invention specifically relates generally to the use of a time dependent magnetic field as the influencing energy source for separation of the ferrous and/or ferric oxide iron content of ferro- titaniferous mineral concentrate at temperatures below the flow point of the titaniferous phase of the mineral concentrate, such as at temperatures below 1600°C or less thereby addressing, or at least providing an alternative, to the high operating and disposal costs of acid leaching of the finely dispersed metallic particles of the above described low temperature process and the high energy costs of the above described high temperature process.
  • Moffatt describes in "Electromagnetic Stirring" 1 that an alternating magnetic field (either single phase or multiphase) applied to a conductor, whether solid or fluid, will induce electric currents in the conductor, and hence a Lorentz force distribution.
  • Moffatt states that while application may be considered in the field of metallurgical processing (e.g. the major industrial process of aluminium smelting), understanding of the flows generated by electromagnetic stirring in all but the most idealized circumstances is still at a fairly primitive level.
  • the new furnace apparatus has independent heat and time dependent magnetic field sources such that the heating of the ore may be controlled independently of the strength of the time dependent magnetic field such that the time dependent magnetic field may be controlled to adjust the reaction temperatures (such as that of the iron content reduction reaction) and also the physical properties of the resultant separated components (such as the sizing of the iron spheroids).
  • a metallurgic process for upgrading ferro-titaniferous mineral concentrate using time dependent magnetic fields comprising more than 10% by weight of iron content calculated as FeO, the process comprising: reducing a substantial portion of the iron content at temperature below the flow point of the titaniferous phase of the mineral concentrate in the presence of a time dependent magnetic field, wherein the time dependent magnetic field is used
  • the majority of the iron spheroids may be greater than 106 ⁇ in diameter.
  • the metallurgic process may further comprise providing a heat source; and providing a separate time dependent magnetic field source; and controlling the time dependent magnetic field source independent of the heat source.
  • the heat source may be controlled independently of the time dependent magnetic field source to heat the ferro-titaniferous mineral concentrate.
  • the time dependent magnetic field contributes to an insubstantial amount of heating as compared to the heat source.
  • Controlling the time dependent magnetic field source may comprise controlling the time dependent magnetic field to control the size of the iron spheroids.
  • Controlling the time dependent magnetic field source may comprise controlling the time dependent magnetic field to control the rate of generation of iron spheroids.
  • the heat source may comprise at least one of an oil, gas and coal fired heat source.
  • Physically separating the iron spheroids may comprise a crushing or grinding phase followed by at least one of sieving, air classification and magnetic separation.
  • the temperature may be below 1600°C.
  • the temperature may be below 1500°C.
  • the temperature may be below 1400°C.
  • the temperature may be between 1000°C and 1370°C.
  • the iron content may be at least one of ferrous and ferric oxide.
  • the carbon source may comprise at least one of coke, charcoal and coal.
  • the ferrous iron content of the mineral concentrate may be reduced to iron metal according to the following reaction: FeO + C ⁇ Fe + CO
  • the ferric iron content of the mineral concentrate may be reduced to iron metal according to the following reaction: Fe 2 0 3 + 3C ⁇ 2Fe + 3CO
  • the carbon source may comprise carbon monoxide.
  • the ferrous iron content of the mineral concentrate may be reduced to iron metal according to the following reaction: FeO + CO ⁇ Fe + C02
  • the ferric iron content of the mineral concentrate may be reduced to iron metal according to the following reaction: Fe 2 0 3 + 3CO ⁇ 2Fe + 3C02
  • the ferro-titaniferous mineral concentrate may be ilmenite (FeTi03) mineral concentrate.
  • the temperature may be between 1050°C and 1350°C.
  • the concentrate may be exposed to the time dependent magnetic field for a retention time of between 2 and 60 minutes.
  • the metallurgic process may further comprise controlling the temperature and retention time according to a predetermined TiC content.
  • the metallurgic process may further comprise adding magnetic additives to the ferro- titaniferous mineral concentrate.
  • the magnetic additives comprise at least one of magnetite and titano-magnetite.
  • the ferro-titaniferous mineral concentrate may be at least one of leucoxene, titanomagnetite and titaniferous iron sands.
  • the metallurgic process may further comprise inclusion of a chemical additive which reports to the iron product.
  • the chemical additive may comprise borates and phosphates.
  • the metallurgic process may further comprise addition of moisture to the ferro-titaniferous mineral concentrate prior the addition of the carbon source.
  • the metallurgic process may further comprise addition of approximately 20% moisture to the ferro-titaniferous mineral concentrate.
  • the metallurgic process may further comprise leaching to remove iron spheroids being smaller than 106 ⁇ in diameter.
  • the leaching may use ferric sulphate.
  • the leaching may involve the oxidation/reduction reaction Fe + 2Fe +++ -> 3Fe ++
  • the metallurgic process may further comprise regenerating ferric ions required for the reaction by oxidation of the resulting ferrous ions by at least one of air, oxygen, ozone or hydrogen peroxide.
  • apparatus for upgrading ferro-titaniferous mineral concentrate comprising more than 10% by weight of iron content calculated as FeO using a time dependent magnetic field at temperatures below the flow point of the titaniferous phase of the mineral concentrate, the apparatus comprising a time dependent magnetic field source controller for controlling the time dependent magnetic field source to control the reduction of the iron content wherein the time dependent magnetic field is used to contribute to the reduced iron content coalescing into iron spheroids.
  • the apparatus may further comprise a heat source and wherein the heat source may be controlled independently of the time dependent magnetic field source to heat the ferro-titaniferous mineral concentrate.
  • Figure 1 shows an exemplary illustrative process circuit for enhancing the beneficiation of ferro-titaniferous mineral concentrate using time dependent magnetic fields in accordance with an embodiment of the present disclosure
  • Figure 2 shows exemplary methods of application for the process wherein an AC electric current is passed through a coil to generate the time dependent magnetic field in accordance with an embodiment of the present disclosure
  • Figure 3 shows an exemplary process for enhancing the beneficiation of ferro-titaniferous mineral concentrate using time dependent magnetic fields in accordance with an embodiment of the present disclosure
  • Figure 4 shows the basic circuit required for the reduction process in accordance with an embodiment of the present disclosure
  • Figure 5 shows the circuit of Figure 4 with the inclusion of ferric sulphate leaching into the reduction circuit in accordance with an embodiment of the present disclosure
  • Figure 5 shows the circuit of Figure 4 with the inclusion of ferric sulphate leaching into the reduction circuit in accordance with an embodiment of the present disclosure.
  • the embodiments described herein relates to the reaction between ilmenite (FeTiOa) mineral concentrate and a source of carbon such as coke, charcoal, coal and the like, whereby the ferrous and ferric iron content of the mineral concentrate is reduced to iron metal according to the reactions:
  • the application of the time dependent magnetic field allows the iron particles to coalesce into metal spheroids, whilst the upgraded titanium bearing fraction remains as a solid phase.
  • the process disclosed herein involves the generation of a time dependent magnetic field by application of an alternating electric current (AC) through a coil in close proximity to the charge being heated.
  • AC alternating electric current
  • iron metal spheroids of diameter > 1mm can be formed at temperatures of between 1050-1350°C using retention times of 2-30 minutes, such that subsequent to their removal by grinding and screening, an upgraded titanium fraction can be produced, ranging from 70-85% Ti0 2 .
  • FIG 1 there is shown an exemplary illustrative process circuit 1 for enhancing the beneficiation of ferro-titaniferous mineral concentrate using time dependent magnetic fields.
  • the circuit 1 comprises a crucible, furnace, kiln 5 or the like comprising the ferro-titaniferous mineral concentrate 4.
  • a reductive 6, such as coke, coal, carbon monoxide or the like is added for the reduction of the iron content of the mineral concentrate 4.
  • the output from the crucible 5 comprises the separated product 7 and the upgraded tataniferous product 8.
  • the circuit 1 comprises a heat source 3 and a time dependent magnetic field source 9.
  • the heat source 3 and the time dependent magnetic field source 9 may be generated by the same apparatus wherein, for example, the heat and the time dependent magnetic field is provided by an induction heating coil.
  • the strength and/or frequency of the time dependent magnetic field may be controlled to influence the size of the iron spheroids generated from the process.
  • figure 1 represents a preferred embodiment wherein the circuit 1 comprises an independent heat source 3 and time dependent magnetic field source 9.
  • the heat source 3 may provide heat through nonconductive means such as from conventional gas, oil or coal fired heat sources.
  • the heat source 3 and the time dependent magnetic field source 9 may comprise independent controls therefor.
  • the heat source 3 may comprise a heat source controller 2 configured to control the operating temperature of the crucible 5 which is controlled independently of a time dependent magnetic field source controller 10 configured to control at least the strength and frequency of the time dependent magnetic field, the latter, as alluded to above, being controlled at least for influencing the iron reduction and coalescing of the size of the iron spheroids or the rate of generation thereof.
  • a heat source controller 2 configured to control the operating temperature of the crucible 5 which is controlled independently of a time dependent magnetic field source controller 10 configured to control at least the strength and frequency of the time dependent magnetic field, the latter, as alluded to above, being controlled at least for influencing the iron reduction and coalescing of the size of the iron spheroids or the rate of generation thereof.
  • circuit 1 For example, we have found that operation of the circuit 1 can result in the production of pig iron in the form of spheroids with a minimum ball diameter of approximately 150 microns (0.15 mm) and an upgraded ilmenite product with a maximum particle size of 150 microns (0.15 mm).
  • FIG 2 there is shown the exemplary methods of application for the process wherein an AC electric current is passed through a coil 12 to generate the time dependent magnetic field passing through and around the coil 12.
  • the time dependent magnetic field can generate eddy currents within any material placed inside the coil 12.
  • an alternating current passing through the coil 12 will result in a time dependent magnetic field changing in direction at the same rate as the frequency of the alternating current wherein, for example a 60Hz AC current will cause the electromagnetic field to switch directions 60 times per second.
  • potential applications of the process 1 comprise the batch basis as substantially shown in figure 2A comprising a furnace 15 having the coil 12 therein.
  • crucible 13 having a graphite lining 14 accommodating the mineral concentrate 4.
  • the process may be implemented on a continuous basis as substantially shown in figure 2B wherein a rotary kiln 17 is utilised.
  • the rotary kiln 17 may be heated by conventional means, such as by being oil, gas or coal fired.
  • the coil 12 surrounds the kiln 17 wherein the mineral concentrate 4 is fed in at one end such that product 16 is discharged from the other end of the kiln 17.
  • the coil 12 can be located alongside the rotary kiln 17 as opposed to being coaxial with the kiln 17.
  • the crucible 13 and the rotary kiln 17 are made from non-magnetic material, such as stainless steel or aluminium.
  • FIG 3 there is shown an exemplary process 20 for enhancing the beneficiation of ferro-titaniferous mineral concentrate using time dependent magnetic fields.
  • ferro-titaniferous mineral concentrate 4 comprising more than 10% by weight of iron content calculated as FeO is combined with a suitable reductive and heated in the presence of the time dependent magnetic field.
  • step 18 the charge is allowed to cool wherein, at step 19, the product is crushed or ground to approximately 106 ⁇ .
  • the iron content of the crushed product is screened by physical means wherein iron spheroids having sizes of greater than approximately 106 ⁇ are separated as metal product 7.
  • the remaining TiC solids and fine pig iron having sizing of less than 106 ⁇ is separated by a dry roll magnet having 1,000 to 1,500 gauss field strength for recycling to the furnace such that no or little solid waste is produced by operation of the process.
  • induction heater was both the source of the heat and the time dependent magnetic field, as alluded to above, in a preferred embodiment, separate heat and time dependent magnetic field sources are desirable for independent control of the heating of the ore and the effects of the time dependent magnetic field.
  • the coil may be utilised initially for heating the ore and then subsequently controlled to impart the effects of the time dependent magnetic field relating to the reduction of the iron content and the coalescence of such into iron spheroids.
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was observed to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • the initial UGI therefore still contained some fine iron metal physically attached to fine UGI particles, indicating that insufficient retention time had been allowed within the desired temperature zone for complete coagulation of the iron into +106 micron spheroids and that in fact 83.5% of the iron content of the ilmenite had been reduced to metal, with 100% recovery of the titanium content as UGI containing 81% Ti0 2 .
  • This UGI product is ideally suited to Titanium Dioxide pigment production by the Sulphate Route as an alternative to Titanium Slag, due to its high T1O2 sulphate solubility (>97%), low iron content and low levels of deleterious impurities.
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was observed to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was observed to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was found to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • This UGI product represents a unique and highly attractive alternative to ilmenite concentrate as a feed-stock for Titanium Dioxide pigment production by the Sulphate Route as, while exhibiting similar T1O2 content to available ilmenite feed-stocks, it has been found to be much more reactive to sulphate medium (>99.9% T1O2 solubility) than ilmenite (92-96% T1O2 solubility), but with much lower iron content, all in ferrous form.
  • the addition of 20% moisture to the ilmenite concentrate prior to addition of the carbon source in the mixing procedure used before charging the furnace crucible may result in an improvement in repeatability and a lowering of the required operating temperature required to achieve equivalent UGI yield and quality over a given reduction time.
  • Fine iron particles may be present in the ⁇ 106 micron titaniferous fraction of reduced solid discharge from the furnace after the grinding and screening steps, due to incomplete ball formation in the furnace step, or to inefficiency in the magnetic separation step designed to remove residual iron metal.
  • Magnetic separation inefficiency may occur due to the particles being outside the particle size range for efficient operation of dry roll magnetic separators. It is also possible that a fraction of the solids may have a similar magnetic susceptibility to that of the iron particles.
  • any residual fine iron metal content of the titaniferous solid product can be removed by a subsequent leaching step, involving mechanical agitation of the solids with stoichiometric quantity of ferric sulphate as a dilute solution for 10 minutes, followed by filtration, washing and drying.
  • ferric ions required in this reaction can easily be regenerated by oxidation of the resulting ferrous ions by air, oxygen, ozone or hydrogen peroxide.
  • the leached solids obtained from both the ⁇ 106 micron size fraction of the furnace discharge and the magnetic fraction extracted from it are of similar Ti0 2 and Fe content to that of the non-magnetic product extracted from the ⁇ 106 micron size fraction by magnetic separation at 600 gauss. Addition of Titano-magnetite.
  • titanomagnetite has a Currie point of around 500°C and therefore can be expected to act in a similar fashion to the graphite crucible liner up to that temperature.
  • Currie point of around 500°C
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was observed to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • the magnetic fraction containing the balance of the TiC content and the fine iron metal particles, can be recycled to the furnace or can more advantageously be leached with ferric sulphate, to produce a solid with a similar composition to the non-magnetic fraction, thereby extracting 100% of the T1O2 content as UGI free from iron metal and containing 89.5% T1O2 and 4.8% Fe.
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was observed to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • the size range of the iron spheroids was then determined by screening at 250 and 425 microns.
  • the ⁇ 106 micron solids fraction was then leached for 10 minutes in 100 ml of 10% ferric sulphate using a mechanical stirrer. The solids were then recovered by filtration, dried, weighed and analysed.
  • the final solid was then tipped into a ceramic bowl, cooled to room temperature and was observed to consist predominantly of iron metal in the form of small spheroids, contained within a matrix of titaniferous solids.
  • the size range of the iron spheroids was then determined by screening at 250 and 425 microns.
  • Ferric sulphate leaching offers a simple and safe method of elimination of iron metal from UGI and provides an insurance, should other means of achieving this result, such as alternative magnetic separation equipment more suited to the particle size range involved or longer furnace retention times and the final choice becomes a matter of economics.
  • Ferric leaching step can be most economically achieved by use of a ferrous sulphate solution at pH 3.4, in a reaction vessel fitted with a particular design of aeration agitator, in which transient ferric ions are generated by oxidation of ferrous ions with oxygen, either as air, oxygen gas or ozone.
  • oxidation can be achieved by direct addition of hydrogen peroxide to the leach solution at the desired rate.
  • titano-magnetite is shown as an option in all three circuits of Figures 4-6.
  • ferric hydroxide by product generated by ferric leaching can either be discharged to tailings, sold to a ferric sulphate manufacturer or recirculated to the furnace as part of the moisture make-up.

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Abstract

L'invention concerne un procédé métallurgique permettant de valoriser un concentré minéral ferro-titanifère (comportant une teneur en fer de plus de 10% en poids calculée sous forme de FeO) à l'aide de champs magnétiques dépendants du temps. Le procédé comporte la réduction d'une partie importante de la teneur en fer à une température inférieure au point d'écoulement de la phase titanifère du concentré minéral en présence d'un champ magnétique dépendant du temps, le champ magnétique dépendant du temps étant utilisé pour au moins contribuer à la coalescence de la teneur en fer réduite sous forme de sphéroïdes de fer et à la séparation physique par la suite des sphéroïdes de fer.
PCT/AU2017/050746 2016-07-29 2017-07-20 Procédé métallurgique de valorisation de concentré minéral ferro-titanifère à l'aide de champs magnétiques dépendants du temps Ceased WO2018018069A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2017301099A AU2017301099B2 (en) 2016-07-29 2017-07-20 A metallurgical process for upgrading ferro-titaniferous mineral concentrate using time dependent magnetic fields
CN201780060135.9A CN109789426A (zh) 2016-07-29 2017-07-20 使用时变磁场来提高含铁钛矿物精矿品位的冶金工艺

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Application Number Priority Date Filing Date Title
AU2016902992A AU2016902992A0 (en) 2016-07-29 A metallurgical process for upgrading ferro-titaniferous mineral concentrate using time dependent magnetic fields
AU2016902992 2016-07-29

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109013050A (zh) * 2018-09-18 2018-12-18 攀钢集团矿业有限公司 一种钛铁矿回收工艺
CN109954575A (zh) * 2019-03-29 2019-07-02 中冶北方（大连）工程技术有限公司 提高钛磁铁矿回收率的选矿工艺
CN110075993A (zh) * 2019-03-29 2019-08-02 中冶北方（大连）工程技术有限公司 钛铁矿选钛工艺
CN113351872A (zh) * 2021-05-31 2021-09-07 中南大学 一种基于电磁场作用下的粉末冶金铁粉制备方法
CN114713508A (zh) * 2022-04-06 2022-07-08 攀钢集团攀枝花钢铁研究院有限公司 提高含钒铁精矿TFe品位的方法
CN116273446A (zh) * 2023-02-23 2023-06-23 中国地质科学院矿产综合利用研究所 从钒钛磁铁矿总尾矿中回收钛铁矿的选矿方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111389583A (zh) * 2020-03-06 2020-07-10 长沙矿冶研究院有限责任公司 一种强化砂矿型钛铁矿分选效率的选矿方法
CN111659535B (zh) * 2020-05-26 2022-10-11 金堆城钼业股份有限公司 一种钼钨分离方法
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721793A (en) * 1954-01-08 1955-10-25 American Cyanamid Co Method of beneficiating ferrotitaniferous ores
US3552564A (en) * 1967-04-25 1971-01-05 Burgener Technical Enterprises Ferromagnetic ore concentrator and method of processing ores therewith
CA2302712A1 (fr) * 2000-03-24 2001-09-24 Council Of Scientific & Industrial Research Processus de preparation de rutile synthetique de qualite superieure et de fonte de premiere fusion
RU2295582C1 (ru) * 2005-06-30 2007-03-20 Общество с ограниченной ответственностью Фирма "ДАТА-ЦЕНТР" (ООО Фирма "ДАТА-ЦЕНТР") Способ переработки шлаков, содержащих оксид титана
EP2698196B1 (fr) * 2011-03-30 2014-12-17 Kolesnik, Viktor Grigorjevich Procédé de réduction de silicium et de titane par la génération d'interactions électromagnétiques de particules de sio2, fetio3 et d'ondes magnétiques

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0658214A4 (fr) * 1992-08-14 1996-07-03 Tech Resources Pty Ltd Amelioration de materiaux titaniferes.
JP4153281B2 (ja) * 2002-10-08 2008-09-24 株式会社神戸製鋼所 酸化チタン含有スラグの製造方法
CN100515578C (zh) * 2007-01-22 2009-07-22 陈鼎明 金属分离器
JP5384175B2 (ja) * 2008-04-10 2014-01-08 株式会社神戸製鋼所 粒状金属鉄製造用酸化チタン含有塊成物
CN101718492A (zh) * 2009-12-15 2010-06-02 青岛福润德自动化技术有限公司 电磁加热温控熔炼炉
CN202024601U (zh) * 2010-12-10 2011-11-02 龙吉林 应用于工业金属炉的高频电磁感应加热装置
CN103215403A (zh) * 2012-04-27 2013-07-24 四川绿冶科技有限责任公司 一种密闭式冶炼系统及在高钛渣生产中的应用
CN205205169U (zh) * 2015-12-03 2016-05-04 沈阳铸梦重工有限公司 废钢再次熔炼设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721793A (en) * 1954-01-08 1955-10-25 American Cyanamid Co Method of beneficiating ferrotitaniferous ores
US3552564A (en) * 1967-04-25 1971-01-05 Burgener Technical Enterprises Ferromagnetic ore concentrator and method of processing ores therewith
CA2302712A1 (fr) * 2000-03-24 2001-09-24 Council Of Scientific & Industrial Research Processus de preparation de rutile synthetique de qualite superieure et de fonte de premiere fusion
RU2295582C1 (ru) * 2005-06-30 2007-03-20 Общество с ограниченной ответственностью Фирма "ДАТА-ЦЕНТР" (ООО Фирма "ДАТА-ЦЕНТР") Способ переработки шлаков, содержащих оксид титана
EP2698196B1 (fr) * 2011-03-30 2014-12-17 Kolesnik, Viktor Grigorjevich Procédé de réduction de silicium et de titane par la génération d'interactions électromagnétiques de particules de sio2, fetio3 et d'ondes magnétiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANISONYAN, K. G. ET AL.: "Magnetizing roasting of leucoxene concentrate", RUSSIAN METALLURGY (METALLY, vol. 2011, no. 7, July 2011 (2011-07-01), pages 656 - 659, XP019980792 *

Cited By (10)

* Cited by examiner, † Cited by third party
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CN109013050A (zh) * 2018-09-18 2018-12-18 攀钢集团矿业有限公司 一种钛铁矿回收工艺
CN109013050B (zh) * 2018-09-18 2020-11-17 攀钢集团矿业有限公司 一种钛铁矿回收工艺
CN109954575A (zh) * 2019-03-29 2019-07-02 中冶北方（大连）工程技术有限公司 提高钛磁铁矿回收率的选矿工艺
CN110075993A (zh) * 2019-03-29 2019-08-02 中冶北方（大连）工程技术有限公司 钛铁矿选钛工艺
CN113351872A (zh) * 2021-05-31 2021-09-07 中南大学 一种基于电磁场作用下的粉末冶金铁粉制备方法
CN113351872B (zh) * 2021-05-31 2023-08-22 中南大学 一种基于电磁场作用下的粉末冶金铁粉制备方法
CN114713508A (zh) * 2022-04-06 2022-07-08 攀钢集团攀枝花钢铁研究院有限公司 提高含钒铁精矿TFe品位的方法
CN114713508B (zh) * 2022-04-06 2023-06-30 攀钢集团攀枝花钢铁研究院有限公司 提高含钒铁精矿TFe品位的方法
CN116273446A (zh) * 2023-02-23 2023-06-23 中国地质科学院矿产综合利用研究所 从钒钛磁铁矿总尾矿中回收钛铁矿的选矿方法
CN116273446B (zh) * 2023-02-23 2024-01-16 中国地质科学院矿产综合利用研究所 从钒钛磁铁矿总尾矿中回收钛铁矿的选矿方法

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