WO2014175094A1 - 製鉄用ヘマタイトの製造方法 - Google Patents

製鉄用ヘマタイトの製造方法 Download PDF

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Publication number
WO2014175094A1
WO2014175094A1 PCT/JP2014/060612 JP2014060612W WO2014175094A1 WO 2014175094 A1 WO2014175094 A1 WO 2014175094A1 JP 2014060612 W JP2014060612 W JP 2014060612W WO 2014175094 A1 WO2014175094 A1 WO 2014175094A1
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Prior art keywords
hematite
iron
separating
magnetic
overflow
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PCT/JP2014/060612
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English (en)
French (fr)
Japanese (ja)
Inventor
小原　剛
秀紀 佐々木
康雅 菅
今村　正樹
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Sumitomo Metal Mining Co Ltd
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Sumitomo Metal Mining Co Ltd
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Priority to CA2908767A priority Critical patent/CA2908767C/en
Priority to AU2014258565A priority patent/AU2014258565B9/en
Priority to EP14788065.2A priority patent/EP3000903B1/en
Priority to US14/784,336 priority patent/US9752209B2/en
Priority to CN201480023084.9A priority patent/CN105164286A/zh
Publication of WO2014175094A1 publication Critical patent/WO2014175094A1/ja
Priority to PH12015502424A priority patent/PH12015502424B1/en
Anticipated expiration legal-status Critical
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    • 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
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
    • B03B5/34—Applications of hydrocyclones
    • 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • 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
    • B03C1/025—High gradient magnetic separators
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/20—Magnetic separation of bulk or dry particles in mixtures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a method for producing hematite for iron making. More specifically, the present invention relates to a technology for recovering hematite for iron making by separating tailing slurry obtained from a final neutralization step of a hydrometallurgical plant by high-temperature acid leaching (HPAL) method of nickel oxide ore.
  • HPAL high-temperature acid leaching
  • Nickel is widely used as a raw material for stainless steel. With the trend of exhaustion of the sulfide ore used as the raw material, technology for refining low-grade oxide ore has been developed and put into practical use. Specifically, nickel oxide ores such as limonite and saprolite are put together with a sulfuric acid solution into a pressure device such as an autoclave, and nickel is leached under a high temperature and high pressure of about 240 to 300 ° C. High pressure acid leaching (High Pressure Acid leaching) (Leach, hereinafter referred to as HPAL.) A manufacturing process called a process has been put into practical use.
  • FIG. 3 shows a schematic flow diagram of the manufacturing process.
  • the nickel leached into the sulfuric acid solution in the HPAL process is neutralized with excess acid by adding a neutralizing agent, and then separated into a leaching residue by solid-liquid separation. Thereafter, nickel is recovered as an intermediate raw material in the form of hydroxide, sulfide, etc. through a process of separating impurities, and is further obtained in the form of nickel metal, nickel chloride, etc. by further purification of the intermediate raw material.
  • the leachate is adjusted to a pH suitable for solid-liquid separation, and in the next solid-liquid separation step, the solid content is measured by equipment called CCD (Counter Current Decantation). Concentration and solid-liquid separation are performed. Usually, a CCD having a plurality of continuous thickeners is used.
  • the liquid component obtained from the CCD (hereinafter sometimes referred to as “overflow”) is sent to the neutralization step in order to adjust to a pH suitable for the sulfidation step.
  • the pH is adjusted and fine solids generated are precipitated and removed, and then, for example, a sulfidation treatment is performed to produce an intermediate raw material called nickel sulfide.
  • the target metal can be obtained by concentrating the target metal to the same level as that of the conventional raw material, and by the purification method and process substantially similar to those of the conventional raw material.
  • this HPAL process can be applied not only to nickel oxide ore but also to other raw materials such as nickel sulfide ore, copper sulfide ore and copper oxide ore.
  • the main component of the leaching residue obtained by the HPAL process is iron oxide
  • the iron content in the leaching residue solids is about 40-50%
  • the amount of leaching residue produced is the amount of intermediate raw material produced.
  • the raw material nickel oxide ore or sulfide ore contains iron in an amount far exceeding the nickel content.
  • iron oxide is abundant in iron ore, and iron ore is widely used as a raw material for refined steel.
  • steel refining iron ore containing iron oxide is charged into a blast furnace together with a reducing agent such as coke, and reduced and melted by heating to form crude steel.
  • the target steel is manufactured by refining this crude steel in a converter.
  • iron ore as a raw material is a limited resource, and it is becoming increasingly difficult to obtain high-quality iron ore necessary for maintaining the quality of steel. For this reason, the examination which uses a leaching residue as an iron ore is made
  • the leaching residue of the HPAL process contains gangue and impurities, particularly sulfur, in addition to iron oxide, it was not suitable as a raw material used in conventional iron making processes. Specifically, the quality of sulfur is high.
  • the sulfur grade in iron oxide that can be used as a raw material for iron making varies depending on the facility capacity, production amount, etc. of each ironworks, but generally it is necessary to suppress it to less than 1%.
  • the leach residue solids contain about 5-8% sulfur.
  • the source of sulfur in the leach residue is calcium sulfate (gypsum), most of which is mixed in the HPAL process.
  • This gypsum is free sulfuric acid remaining in the leaching slurry obtained by high-pressure acid leaching (free sulfuric acid is an acid that remains unreacted among sulfuric acid added excessively to perform sufficient leaching in the HPAL process.
  • free sulfuric acid is an acid that remains unreacted among sulfuric acid added excessively to perform sufficient leaching in the HPAL process.
  • Is generated by the reaction of calcium and free sulfuric acid contained in the neutralizing agent by adding a general and inexpensive calcium-based neutralizing agent such as limestone or slaked lime. which is mixed in the leach residue.
  • a part (about 1%) of sulfur contained in the solid content of the leaching residue is taken into the generated hematite particles.
  • the solid content in the residue after leaching of nickel obtained at this time is composed of particles mainly of hematite of about 1 ⁇ m, and the iron quality in the solid content is about 30 to 40% and the sulfur quality is about 5 to 8%. .
  • the moisture content of the leaching residue obtained at this time is 60%.
  • the iron grade in the leaching residue solid content is 50% or more and the sulfur grade is 1% or less.
  • Patent Document 1 describes a technique for removing impurities in a hematite mixture by subjecting a leaching residue to separation by sieving, separation by a wet cyclone, separation by magnetism, A certain effect was observed to remove impurities in hematite.
  • it is not a satisfactory method for use alone as the above-mentioned hematite for iron making, and it can be improved only to about 40 to 45% even if the iron quality is high. Therefore, in order to use as hematite for iron manufacture, it was necessary to mix with the raw material for iron manufacture containing higher grade iron. Note that the moisture content of the leaching residue obtained after physical separation is about 40%.
  • the present invention has been made to solve such a situation, and proposes a method for separating a leaching residue capable of obtaining a hematite-containing material that can be used as a raw material for iron making. From the leaching residue, hematite for iron making is proposed. The manufacturing method which produces
  • the present inventors have found that the above-described problems of iron quality and sulfur quality can be solved simultaneously by sequentially performing a separation step using a wet cyclone and an appropriate magnetic separation step, and the present invention has been completed. is there.
  • 1st invention of this invention is a manufacturing method of the hematite for iron manufacture from the leaching residue obtained from the wet refining plant of the nickel oxide ore using the high pressure acid leaching method, Comprising:
  • the leaching residue uses a wet cyclone
  • a hematite cake is prepared by sequentially performing at least two steps of separating the overflow into an underflow and separating the separated overflow into a strong and weak magnet using a magnetic force.
  • the method for producing hematite for iron making is characterized in that the step of separating using magnetic force uses a strong magnetic field magnetic separation device.
  • the classification size of the wet cyclone in the step of separating using the wet cyclone in the first invention is not less than a setting where the overflow is 1 ⁇ m or less and not more than a setting where the overflow is 2 ⁇ m or less.
  • the method for producing hematite for iron making is characterized in that the magnetic field strength in the step of separating using s is 5 to 20 [kGauss].
  • the third invention of the present invention includes the dehydration step of adjusting the moisture content of the water contained in the hematite cake in the first and second inventions to 10 wt% to 17 wt%. Is the method.
  • the method for producing hematite for iron making of the present invention it is possible to easily obtain a quality hematite-containing material that can be used as a raw material for iron making from the refining process of oxide ore, and has an industrially significant effect. is there.
  • FIG. 1 is a manufacturing process flow diagram for manufacturing the iron-made hematite of the present invention.
  • the present invention is a leaching residue discharged from a nickel oxide ore hydrorefining plant using a high-pressure acid leaching (HPAL) method as shown in the flow chart of the manufacturing process of the HPAL process in FIG. Means a “final neutralization residue (tailing slurry)” stored in a “tailing dam”.), And the process is a process in which the tailing slurry is a leach residue.
  • HPAL high-pressure acid leaching
  • a hematite for iron making of high iron grade low sulfur product of about 53% by weight of iron grade and about 1% of S grade from leaching residue containing iron: 30 to 35% and sulfur (S): 3 to 10% It is possible to obtain With such a grade composition, it can be used alone for iron making, and even when mixed with other iron making raw materials, there is a large adjustment margin and it is easy to use.
  • iron is included as hematite and S as gypsum.
  • the particle size is, for example, about 1 ⁇ m for hematite and about 30 ⁇ m for gypsum, and the magnetism has a weak magnetism and no other magnetism.
  • such a leaching residue is charged into a wet cyclone, and most of the gypsum having a large particle size is removed as an underflow. Hematite with a small particle size is concentrated in the overflow.
  • the obtained overflow is separated using a “strong magnetic field magnetic separation device” that can be magnetized to such an extent that hematite and chromite can be separated.
  • the magnetic force used in normal magnetic separation is at most about 2000 [Gauss].
  • the magnetic force when passing through the mesh with respect to the powder is at most about 2000 [Gauss]. Since the method of applying is applied, a very strong magnetic force can be applied.
  • This mesh is set so as to have an optimal opening for the powder to be separated.
  • the method for producing hematite for iron making according to the present invention has the greatest feature in that it is first separated by a wet cyclone, and then separated by a strong magnetic field magnetic separator, but is separated by a wet cyclone.
  • Separation is also difficult by the method of applying the magnetic force of the strong magnetic field separation device to be used.
  • the ⁇ strong magnetic field magnetic separation device '' used in the embodiment that applies a magnetic force to the powder when passing through the mesh gypsum having a large particle size clogs the mesh immediately after operation, This is because the separation operation does not proceed.
  • a feature of the method for producing hematite for iron making according to the present invention is that the separation by the wet cyclone is performed by setting the classification size in the wet cyclone to an appropriate range. Next, separation is performed using a magnetic force with the magnetic field strength set to an appropriate range. Therefore, as the setting size of the wet cyclone classification, the overflow setting may be adjusted as appropriate according to the particle size of the hematite and gypsum contained, but the wet cyclone classification size is more than the setting at which the overflow is 1 ⁇ m or less. It is preferable to set it to be equal to or less than the setting of 2 ⁇ m or less.
  • nickel oxide ore is processed by HPAL wet refining, and the hematite contained in the solid content of the leach residue obtained from the final neutralization step is generally about 1 ⁇ m and gypsum has a particle size of about 30 ⁇ m. From the above range, it is possible to enhance the classification effect in the wet cyclone.
  • the preferable condition of the magnetic field strength when separating using magnetic force is 10 to 15 [kGauss]. Basically, a stronger magnetic field strength is preferable, but if it is less than 5 [kGauss], the hematite is not sufficiently separated. On the other hand, if it is larger than 20 [kGauss], not only the effect cannot be expected, but it is not preferable economically.
  • the hematite cake obtained by subjecting the leach residue (water content of about 40%) obtained after the physical separation treatment to the general dehydration treatment in the production method of the present invention has a low sulfur content of less than 1%.
  • a relatively high water content of about 22 wt% is obtained.
  • the transportable moisture value (Transportable Moisture Limit: TML) of hematite was 17 wt% or less. For this reason, when carrying a ship, when manufacturing the hematite cake by this invention, it is necessary to reduce the moisture content.
  • the particle size of hematite is very fine, about 1 ⁇ m, so the possibility of dust generation is very high.
  • This dust generation decreases as the water content increases.
  • the water content is preferably 10 to 17 wt%, and dust-proof measures such as using a flexible container during handling are possible.
  • the moisture content is preferably lower.
  • a dehydration treatment is performed to remove moisture from the hematite cake.
  • the dehydration method includes a heating method, a filter press method, a centrifugal separation method, and the like, but a method using a filter press is desirable from the viewpoint of high water removal efficiency and economy.
  • the hematite cake obtained by the production method of the present invention has a non-uniform mixed state when mixed with other iron ores in an iron manufacturer from the viewpoint of non-uniformity of shape, easy occurrence of powdering, poor fluidity, etc.
  • the problem suggested by granulating and making it a uniform granulated product is suggested because of problems such as low formation efficiency due to low fluidity, and easy generation of dust. Eliminate the point.
  • a well-known granulation method such as rolling granulation, compression granulation, extrusion granulation or the like may be used, and a granulated product having uniform and good fluidity can be obtained.
  • the occurrence of powdering is lower than that of hematite cake.
  • the present invention to the hematite for iron making according to the present invention, the total amount of sulfur derived from gypsum is removed, and the sulfuric acid component incorporated into the hematite particles in the process of high-temperature pressure acid leaching is removed. About 1% of sulfur that is considered to be derived remains. Therefore, by applying a combination of the following known methods, it is possible to obtain a better raw material for iron making. Specifically, as described in “Special Table 2012-517523”, the feed material is dried and calcined to remove sulfur and water of crystal hydration contained in the feed material.
  • hematite obtained by the present invention by roasting the hematite obtained by the present invention at a predetermined temperature, sulfur in the hematite particles can be removed as SOx, and the sulfur quality can be lowered.
  • hematite having a concentration of sulfur of 0.5% or less can be obtained.
  • a heat treatment exceeding 1400 ° C. results in a sulfur concentration of 0.05% or less, and a sulfur concentration equivalent to that of conventional iron ore is obtained.
  • Hematite with a low sulfur concentration can be obtained by heat treatment at a temperature higher than 1400 ° C. However, if the heat treatment temperature is increased, energy consumption is increased and the life of the furnace wall material is shortened. The heat treatment is preferable.
  • Table 1 summarizes the production conditions and characteristic measurement conditions common to the examples and comparative examples.
  • the present invention When separating the leaching residue, the present invention was applied, and first, the wet cyclone shown in Table 1 was treated, and the obtained overflow was subsequently separated by a magnetic beneficiation device.
  • the processing amount of the solid content was 10 tons of leach residue, and the resulting overflow slurry weight was 9.1 tons.
  • 2.2 tons of hematite having an iron content of 53% and an S content of 0.7% was obtained.
  • the present invention When separating the leaching residue, the present invention was applied, and first, the wet cyclone shown in Table 1 was treated, and the obtained overflow was subsequently separated by a magnetic beneficiation device.
  • the processing amount of the solid content was 10 tons of leach residue, and the resulting overflow slurry weight was 9.1 tons.
  • iron content 52%, S: 0.8%, moisture content 15%, 2. 0 ton of hematite was obtained.
  • the present invention When separating the leaching residue, the present invention was applied, and first, the wet cyclone shown in Table 1 was treated, and the obtained overflow was subsequently separated by a magnetic beneficiation device.
  • the processing amount of the solid content was 10 tons of leach residue, and the resulting overflow slurry weight was 9.1 tons.
  • iron content 52%, S: 0.8%, moisture content 15%, 2. 0 ton of hematite was obtained.
  • heat-treating this cake at 1400 ° C. a hematite granulated product having a moisture content of 0% and a sulfur concentration of 0.05% was obtained.
  • the processing was performed in the same manner except that the wet cyclone setting was 1 ⁇ m or less and the magnetic field strength of the magnetic separator was 5 [kGauss] under the processing conditions of Example 1.
  • the obtained overflow slurry weight was 8 tons.
  • hematite with iron content 52%, S: 0.8%, and solid content weight 1.6 tons was obtained.
  • the processing was performed in the same manner except that the wet cyclone setting was 2 ⁇ m or less and the magnetic field strength of the magnetic separator was 20 [kGauss] under the processing conditions of Example 1.
  • the obtained overflow slurry weight was 9.3 tons.
  • hematite with iron content: 55%, S: 0.9%, and solid content weight 2.3 tons was obtained.
  • Example 1 The same operation as in Example 1 was performed except that the present invention was not applied and separation by the above magnetic separator was not performed. As a result, a solid content of 7.9 tons was obtained with an iron content of 37% and an S content of 5%, but it could not be used alone as an iron-made hematite.
  • Example 2 The same operation as in Example 1 was performed except that the present invention was not applied and separation by the wet cyclone was not performed. As a result, the mesh to which the magnetic force was applied was clogged immediately after the operation, and the operation could not be continued.
  • Example 3 The processing was performed in the same manner except that the wet cyclone setting was 0.4 ⁇ m or less and the magnetic field strength of the magnetic separator was 4 [kGauss] under the processing conditions of Example 1. The resulting overflow slurry weight was 0.5 tons. When magnetic separation was performed, a very small amount of low-grade hematite was obtained with iron content: 49%, S: 1.2%, and solid content weight of 0.01 ton.
  • Example 4 The processing was performed in the same manner except that the wet cyclone setting was 2.5 ⁇ m or less and the magnetic field strength of the magnetic separator was 22 [kGauss] under the processing conditions of Example 1.
  • the obtained overflow slurry weight was 9.3 tons.
  • hematite with high S quality was obtained: iron content: 52%, S: 1.5%, solid content weight: 2.1 tons.

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  • Organic Chemistry (AREA)
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  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
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  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Iron (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
PCT/JP2014/060612 2013-04-24 2014-04-14 製鉄用ヘマタイトの製造方法 Ceased WO2014175094A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2908767A CA2908767C (en) 2013-04-24 2014-04-14 Method for producing hematite for ironmaking
AU2014258565A AU2014258565B9 (en) 2013-04-24 2014-04-14 Method for producing hematite for ironmaking
EP14788065.2A EP3000903B1 (en) 2013-04-24 2014-04-14 Method for producing hematite for iron manufacturing
US14/784,336 US9752209B2 (en) 2013-04-24 2014-04-14 Method for producing hematite for ironmaking
CN201480023084.9A CN105164286A (zh) 2013-04-24 2014-04-14 炼铁用赤铁矿的制造方法
PH12015502424A PH12015502424B1 (en) 2013-04-24 2015-10-21 Method for producing hematite for ironmaking

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JP2013091814A JP5772869B2 (ja) 2013-04-24 2013-04-24 製鉄用ヘマタイトの製造方法
JP2013-091814 2013-04-24

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EP (1) EP3000903B1 (enExample)
JP (1) JP5772869B2 (enExample)
CN (1) CN105164286A (enExample)
AU (1) AU2014258565B9 (enExample)
CA (1) CA2908767C (enExample)
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WO (1) WO2014175094A1 (enExample)

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JP2015063762A (ja) * 2015-01-06 2015-04-09 住友金属鉱山株式会社 製鉄用ヘマタイトの製造方法
WO2015107985A1 (ja) * 2014-01-17 2015-07-23 住友金属鉱山株式会社 製鉄用ヘマタイトの製造方法
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