WO2004033730A1 - 酸化チタン含有スラグの製造方法 - Google Patents
酸化チタン含有スラグの製造方法 Download PDFInfo
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- WO2004033730A1 WO2004033730A1 PCT/JP2003/011003 JP0311003W WO2004033730A1 WO 2004033730 A1 WO2004033730 A1 WO 2004033730A1 JP 0311003 W JP0311003 W JP 0311003W WO 2004033730 A1 WO2004033730 A1 WO 2004033730A1
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- furnace
- slag
- oxide
- reduction
- iron
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
- C21B13/143—Injection of partially reduced ore into a molten bath
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
-
- 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
- C22B34/1218—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 obtaining titanium or titanium compounds from ores or scrap by dry processes
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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
- 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
- C22B34/1263—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 obtaining metallic titanium from titanium compounds, e.g. by reduction
- C22B34/1281—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 obtaining metallic titanium from titanium compounds, e.g. by reduction using carbon containing agents, e.g. C, CO, carbides
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- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
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- 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 slag containing titanium oxide, and more particularly to a method for efficiently producing slag containing titanium oxide by previously reducing iron oxide contained in raw material ores and the like.
- a carbonaceous reducing agent for example, coke While the supply amount is adjusted by the supply amount adjusting means 3, each of them is supplied to an electric furnace (Submerged Arc Furnace, sometimes abbreviated as SAF) 9 to reduce and melt the iron oxide. It is known to remove molten iron and remove slag containing titanium oxide from the outlet of the furnace wall.
- SAF Submerged Arc Furnace
- ilmenite ore is mixed with a carbonaceous reducing agent such as coke and a small amount of calcium oxide, and the mixture is granulated and charged into an electric furnace, which is then heated to form molten iron and molten titanium oxide.
- a carbonaceous reducing agent such as coke and a small amount of calcium oxide
- the present invention has been made in view of the above-described conventional technology.
- the present invention suppresses the reduction of titanium dioxide and reduces power consumption.
- An object of the present invention is to provide a method capable of efficiently producing a slag containing titanium oxide while minimizing the amount of slag. Disclosure of the invention
- the present invention that has solved the above-mentioned problems is that a raw material mixture containing titanium oxide, iron oxide, and a carbonaceous reducing agent, or a raw material mixture further containing a calcium oxide source is heated in a reduction furnace, and the iron oxide in the mixture is heated. Is reduced to reduced iron, and then supplied to a heating-type melting furnace, heated in the melting furnace to melt the reduced iron and separate from the slag containing titanium oxide, and the slag containing titanium oxide obtained is taken out of the furnace.
- This is a method for producing slag containing titanium oxide, which has the gist of discharging and collecting.
- the temperature of the mixture after reduction is 350 ° C. or less, preferably 65 ° C. or less. Preferably, it is 900 and does not mean the following.
- the present invention provides a raw material mixture containing titanium oxide, iron oxide, and a carbonaceous reducing agent, or a raw material mixture further containing a calcium oxide source, which is heated in a reduction melting furnace to reduce iron oxide in the mixture. Reduced iron is obtained, and then further heated to melt the reduced iron and separate it from the titanium oxide-containing slag. The resulting titanium oxide-containing slag is discharged out of the furnace and collected.
- a method for producing a titanium oxide-containing slag which comprises using a moving bed type reduction melting furnace as the reduction melting furnace.
- the furnace is divided into at least two or more in the direction of movement of the hearth, and among the divided sections, the upstream side in the direction of movement of the hearth is a reduction section, The downstream side of the hearth moving direction is a heating and melting section, and it is desirable to adjust the temperature for each of these sections.
- the temperature of the reduction zone is set to 1200 to 150 :
- the temperature of the heating / melting zone is set to 130 to 150
- the temperature of the heating / melting zone is lower than the temperature of the reduction zone. Is preferably 100 to 300 t: high temperature.
- FIG. 1 is a schematic diagram showing an example of an embodiment of the present invention.
- FIG. 2 is a schematic diagram showing an example of the embodiment of the present invention.
- FIG. 3 is a schematic diagram showing an example of the embodiment of the present invention.
- FIG. 4 is a schematic diagram showing a conventional embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
- titanium oxide-containing slag (hereinafter referred to as titanium slag) from a raw material mixture containing titanium oxide, iron oxide, and a carbonaceous reducing agent, or a raw material mixture further containing a calcium oxide source.
- the above object can be attained by using a bed-type reduction melting furnace, or by adopting a method in which the raw materials are charged into a reduction furnace to reduce the iron oxide by heating and then charged into a heating-type melting furnace to be melted.
- the present inventors have found that the present invention can be achieved, and have reached the present invention.
- the iron oxide contained in the raw material mixture is sufficiently reduced in advance as described above.
- the power consumption for maintaining the furnace temperature can be greatly reduced, the consumption of the electrodes can be reduced, and the amount of molten FeO generated can be reduced to reduce the furnace wall refractories.
- the raw material mixture used in the present invention is a mixture of titanium oxide, iron oxide, a carbonaceous reducing agent, or a mixture further containing a calcium oxide source.
- the types of titanium oxide and iron oxide are not particularly limited.
- natural ores such as ilmenite (ilmenite ore), titanium magnetite, and pseudoplated titanium
- centrifugation in a titanium oxide production process using a sulfuric acid method is also possible.
- Titanium oxide and by-products from the production of titanium can be used, such as residue in a separator ⁇ residue after a filter or residue separated after a chlorination furnace in the chlorine method.
- These raw materials may be mixed as needed.
- the amount of iron oxide is adjusted by adding iron ore or iron dust, or the amount of titanium oxide is adjusted by adding rutile, anatase, synthetic rutile, or the like. You may. It is preferable to use an iron dust containing carbon and iron oxide, such as blast furnace wet dust, because a carbonaceous reducing agent can be added at the same time.
- an iron dust containing carbon and iron oxide such as blast furnace wet dust
- a carbonaceous reducing agent can be added at the same time.
- a raw material mixture in which ilmenite ore and a carbonaceous reducing agent are mixed will be described as a representative example, but ilmenite ore may be naturally occurring, and the ratio of titanium, iron, and the like is not particularly specified. It is not limited to.
- ilmenite ore contains 40 to 60% by mass of titanium oxide and 30 to 50% by mass of iron oxide.
- the iron oxide component in the raw material mixture is preferably at least 1/20, more preferably at least 3/20, of the titanium oxide component.
- the energy of dissolving titanium oxide in the melting furnace can be reduced by preferably 10% or more, more preferably 30% or more.
- the native Irumenai Bokuko is such a significant amount of S i ⁇ 2 is contained as gangue components, A 1 2 0 3, C A_ ⁇ , including Umate gangue component and M G_ ⁇ is It is desirable that the content in the raw material mixture is small, since it is mixed with titanium slag and causes a reduction in titanium purity.
- the carbonaceous reducing agent is not particularly limited as long as it contains carbon, and examples thereof include coal, charred coal, coke, oil coke, charcoal, organic carbide, and waste plastic. Although the amount of the carbonaceous reducing agent is not particularly limited, it is preferable to appropriately change the amount of the carbonaceous reducing agent so as to be sufficient for reducing iron oxide.
- the number is more than the number of moles of oxygen combined with iron oxide. Since the utilization rate of carbon differs for each raw material and carbon, it is desirable to adjust it appropriately. Excess carbon in the reduction reaction can be carburized into reduced iron and become carbon in pig iron, or can be used as a heat source by burning it in a melting furnace. Of course, the carbonaceous reducing agent may be charged into the furnace together with the mixture, or may be previously laid on the hearth, but a sufficient amount of the carbonaceous reducing agent is kneaded with the other materials into the mixture. This is desirable because the vicinity of iron oxide can be maintained in a highly reducing atmosphere during reduction, and thus reoxidation of reduced iron can be suppressed.
- the raw material mixture may be obtained by kneading the above raw materials in powder form using any mixing means such as a mixer, and the kneading method is not particularly limited.
- the resulting mixture may be used as it is in powder form.
- the raw material mixture is pre-kneaded using any molding method such as briquetting press, rolling granulation or extrusion molding.
- any molding method such as briquetting press, rolling granulation or extrusion molding.
- It is desirable to form an agglomerate compact such as a pellet or plate.
- a briquette shaped body hereinafter referred to as “raw material shaped body” will be described as a representative example.
- an appropriate amount of calcium oxide source eg, slaked lime, limestone, etc.
- titanium slag forming components titanium oxide and raw materials used in the raw material compact
- the slag component such as C A_ ⁇
- the slag component contained as such ash gangue component Ya carbonaceous material in stomach ore, produced at the time of melting of changing Mototetsu This is desirable because the melting point of the titanium slag decreases and the fluidity of the titanium slag increases, and the separation between the titanium slag and the molten iron increases.
- the raw material compact may be granulated by blending calcium oxide, or the calcium oxide source may be provided on the raw material compact to perform the oxidation treatment. Alternatively, a calcium oxide source may be separately charged during melting.
- the furnace temperature is set to a high slag melting temperature (for example, from 160 It is necessary to increase it to 175), which increases the energy consumption and damages the refractory and wears out the electrodes, increasing the manufacturing cost. Therefore, the calcium oxide source should be used as necessary, taking into account the quality of the product and the production cost.
- a binder such as bentonite, starch, slaked lime, or an organic binder may be used as necessary.
- the movable hearth furnace is not limited as long as it includes a movable type hearth.
- a movable bed type reduction melting furnace or a movable hearth furnace having any structure such as a straight-grate type or a rotary hearth furnace
- a moving-bed type reduction furnace The moving hearth furnace is easy to control the temperature, and the iron oxide can be selectively removed in a short time while maintaining a lower temperature compared to the conventional melting furnace and reduction furnace, that is, a temperature below the temperature at which the reduction of titanium oxide starts. This is desirable because it allows efficient reduction treatment.
- a rotary hearth furnace requires relatively little space for installation, it is easy to adjust the atmosphere inside the furnace, and it is possible to increase the reduction rate of iron oxide while suppressing the reduction of titanium dioxide. Is desirable.
- the rotary hearth In operating the rotary hearth furnace, the rotary hearth may be rotated at a predetermined speed, and the raw material compact may be supplied onto the rotary hearth from the charging means so as to have an appropriate thickness.
- the raw material compact placed on the hearth is heated and reduced by receiving the combustion heat and radiant heat from a combustion means such as a combustion burner provided at an appropriate position on the wall of the furnace body.
- the highly reducing atmosphere is maintained by the large amount of C ⁇ gas generated by the combustion of the carbonaceous reducing agent in the raw material compact due to the combustion heat and radiant heat, and iron oxide is reduced, so the adjustment of the furnace atmosphere gas is easy. It is.
- the carbonaceous reducing agent contributes as fuel by increasing the reduction potential in the vicinity of the raw material compact and then burning in the furnace, so that burner fuel consumption such as natural gas can be reduced.
- the iron oxide in the raw material compact is almost completely reduced in a reducing atmosphere in the furnace, and then a scraper method provided downstream in the hearth moving direction, or It is desirable that the liquid be discharged sequentially by a discharge device such as a screw-type method.
- heating and melting is performed after reducing the reduction of iron oxide to a reduction rate of less than 30%, the above problem due to an endothermic reaction may occur.
- the heating and melting in the next step is performed after securing a reduction ratio of 60% or more, preferably 70% or more, more preferably 85% or more, the temperature decrease due to the endothermic reaction is suppressed, and the electric power is reduced. Continuous operation can be performed stably without increasing consumption.
- the amount of molten Fe F generated can be reduced, so that damage to the furnace refractory can be minimized.
- the furnace temperature is set to 1200 to 150O, more preferably 120%. It is desirable to carry out the reduction while maintaining the range of 0 to 140. This is because, in the range of 1200 to 1500X :, only iron oxide can be selectively and efficiently reduced without reducing titanium oxide.
- the heating temperature is lower than 1200 ° C., the progress of the reduction reaction of iron oxide is slow, and the residence time in the furnace must be prolonged, resulting in poor productivity.
- the furnace temperature exceeds 1500, the reduction reaction of titanium dioxide proceeds, and the recovery rate as titanium slag decreases.
- it exceeds 150 bleeding of low melting point slag containing FeO occurs in the reduction step, so that the hearth refractory material is significantly melted and continuous operation may be difficult.
- the bleeding phenomenon may occur in the temperature range of 140 to 1500, but the frequency and possibility are relatively small.
- the temperature inside the furnace should be set to 1200 ° C or less in the early stage of the reduction period, and then the temperature should be raised to 1200 to 150 ° C to proceed with the reduction. It is possible. Although there are slight differences depending on the ratio of iron oxide and titanium oxide constituting the raw material compact, the type of carbonaceous material, and the like, the reduction of iron oxide can be completed in about 5 to 20 minutes.
- a mixture (referred to as a raw material for producing titanium slag) in which titanium oxide is hardly reduced although most of the iron oxide is reduced.
- the shape of the raw material for titanium slag production is not always the same as the shape before charging the moving hearth furnace, and the shape in which some components such as slag are separated and the shape in which reduced iron is partially separated Etc., which vary depending on the composition of the raw material mixture, reduction conditions, and the like.
- the titanium slag production raw material of the present invention obtained by the reduction treatment has a low iron oxide content, the above-mentioned problems caused by the iron oxide during the melting treatment are suppressed, the power consumption is reduced, and the electrode consumption is reduced. Reduction of refractory in the furnace, and reduction of titanium dioxide reduction. Further, since the melting of the reduced iron proceeds in a short time, the problem of reduction of titanium dioxide due to a long residence time does not occur, and the titanium oxide slag can be efficiently produced.
- the iron oxide in the raw material is sufficiently reduced prior to the heat-melting treatment, and most of the iron oxide has been reduced. Therefore, the reduction of titanium dioxide can be suppressed.
- the atmosphere in the furnace may be controlled by additionally introducing a carbonaceous reducing agent during the melting process. If the atmosphere in the furnace is maintained in a reducing state, the reduction of the remaining iron oxide is promoted, and the melting point is lowered by carburizing of the reduced iron, so that the reduced iron can be melted at a relatively low temperature. By the way, if the amount of carbon is insufficient, the melting point of reduced iron will not drop sufficiently, and the temperature for heating and melting may need to be increased to 150 or more.
- the operating temperature should be kept below about 150 ° C. Is desirable. Therefore, it is desirable to appropriately adjust the atmosphere gas composition during the melting treatment so that the reduced iron can be quickly melted in the temperature range of 1300 to 1500.
- the raw materials for titanium slag production in the reduction furnace are charged into a known heating type melting furnace used in the production of titanium slag, such as an electric furnace, for carburizing and melting.
- the raw material compact may be charged into a moving bed type reduction / melting furnace, and may be heated and melted following the reduction treatment in the furnace.
- the iron oxide in the mixture is reduced to reduced iron, and then supplied to a heating-type melting furnace, the iron oxide is reduced. It is desirable that the raw material is continuously supplied to the heating type melting furnace without cooling, and the raw material for titanium slag production discharged from the reduction furnace is cooled to a temperature below the melting point. This is because it has a heat of about 0 to 1300 and it is wasteful in terms of thermal energy to cool it down to room temperature and then supply it to the heating type melting furnace. Therefore, if it is supplied to a heating type melting furnace while maintaining this high temperature state, it becomes extremely practical in terms of reducing heat loss.
- this heat is used as it is as a heat source for the melting furnace, it can contribute to a reduction in energy consumption for heating the melting furnace.
- the reduction furnace and the heating type melting furnace may be directly connected by a shoot or the like, or may be once transferred to a refractory-lined container and then put into the heating type melting furnace.
- “not cooling substantially” means not actively cooling, and excludes, for example, a case where cooling is performed by cooling a device component such as a shoot.
- the heating type melting furnace for example, an electric furnace or a melting furnace using fossil fuel is exemplified, but any melting furnace which is used for manufacturing titanium slag can be adopted.
- the molten iron can be efficiently heated by arc heat without forcibly stirring, thereby reducing the melting loss of the refractory lining and reducing it. It is preferable because melting can be efficiently advanced.
- This arc includes a submerged arc generated by inserting an electrode into a titanium slag floating on the molten iron in the melting furnace and energizing the electrode.
- a raw material charging section is provided near the arc heating section (that is, the electrode insertion section) so that the raw material for titanium slag charged into the arc heating type melting furnace receives the arc heat and is quickly reduced and melted. It is good to provide.
- a charging means may be provided toward the charging position of the raw material for producing titanium slag.
- molten iron is produced by melting the charged raw material for titanium slag production, which is sequentially taken into the molten iron already generated and retained before that, and The gangue component and titanium oxide that coexist in the slag become molten titanium slag and join the molten slag floating on the surface of the molten metal. Therefore, when a predetermined amount of molten iron or molten titanium slag has accumulated in the arc-heating type melting furnace, the molten iron is sequentially extracted from a position below the side wall of the melting furnace, and an interface position between the molten titanium slag and the molten iron. The molten titanium slag may be appropriately extracted from slightly above. The molten titanium slag and the molten iron or molten iron may be discharged by tilting the furnace.
- the obtained molten titanium slag may be used as it is after cooling, or may be crushed and then separated from other slag components by screening or the like.
- the obtained molten metallic iron may be used as a raw material for ironmaking.
- the melting process is performed after the reduction process in the rotary hearth furnace. If the two-stage heating method is adopted, which reduces the remaining iron oxide and melts the generated reduced iron, the titanium oxide can be stabilized together with the reduced iron. And can be manufactured efficiently. Therefore, such a 2
- the step heating method for example, the inside of the rotary hearth furnace is partitioned into at least two or more in the moving direction of the hearth by a partition, and the upstream of the partitioned sections is the reduction section, and the downstream side is heated.
- the melting section has a structure in which the temperature and the atmosphere gas composition can be individually controlled in each section.
- the inside of the furnace may be divided into four or more sections by three or more partition walls so that more strict control of the temperature and the composition of the atmosphere gas can be performed. It can be arbitrarily increased or decreased according to the scale or structure.
- a cooling section provided with any cooling means is provided in the furnace to cool and solidify the molten iron, the molten iron can be easily extracted by a discharge device provided on the downstream side. At this time, the by-product slag is also discharged as titanium slag, but these may be separated by any separation means (crushing / screening, etc.).
- the temperature in the furnace is set at 100 to 300 t: more preferably 120 to 2 to be higher than the temperature at the time of the above-mentioned melting at the time of the reduction in order to promote reduction and melting more smoothly and efficiently. It is desirable to set the temperature to about 50 at about high temperature.
- the titanium slag does not have to be melted.
- slag containing high titanium can be obtained by crushing after discharging outside the furnace and then sorting by any means such as magnetic separation.
- the method for producing slag containing titanium oxide of the present invention is also applicable to a method for producing slag containing vanadium oxide and niobium oxide.
- Vanadium oxide-containing substances include titanium vanadium-containing magnetite, smoke ash from boilers, and waste catalysts.
- a material containing a carbonaceous reducing agent added to a raw material containing vanadium oxide and iron oxide is charged into a reduction furnace to reduce iron oxide, and then melted in a melting furnace to form a slag containing vanadium oxide. Can be obtained.
- niobium ore such as prote-columbite is used as the niobium oxide-containing substance.
- a reduction furnace containing niobium oxide and iron oxide and a carbonaceous reducing agent added is charged to the reduction furnace. Then, iron oxide is reduced and then melted in a melting furnace to obtain a niobium oxide-containing slag.
- a reduction melting furnace can be employed for this reduction and melting.
- pre-ground carbonaceous reducing agent (coal, fixed carbon content 74.0%, volatile content 15.5%, ash content 10.5%) and ilmenite ore (Ti 0 2 : 44.4%, Total Fe: 31.3% (Fe 0: 36.7%), Si ⁇ 2 and other components: the rest) are supplied through line 1 and line 2, respectively.
- mixing means 4 mixing means 4 (mixer) (mixing ratio: 10.2 parts by mass of coal: 89.8 parts by mass of ilmenite ore), and molasses as a binder is about 3%.
- the raw material for titanium slag discharged from the rotary hearth furnace of Example 1 is shown in FIG. 1 in a state where the temperature is kept as low as possible (900 ° C) so as not to come into contact with the atmosphere as much as possible.
- the heating furnace 9 was continuously placed in the vicinity of the rotary hearth furnace, and was continuously heated and melted. At this time, a fixed amount of molten iron is held in the melting furnace, and an electrode for arc heating is energized while protruding into the molten slag layer to adopt a submerged arc heating method. Used. Then, a raw material for producing titanium slag was charged toward the vicinity of the arc heating section, and melting by arc heating was advanced.
- Example 1 The raw material for titanium slag production obtained in Example 1 was melted in an arc-heating type melting furnace 9 in the same manner as in Example 2 except that the raw material for titanium slag production was allowed to cool to room temperature in the cooling equipment 7 shown in FIG. Slag and molten iron were produced.
- composition of the obtained molten iron and the composition of titanium slag were the same as in Example 2, but the power unit for the arc heating electrode in this example was about 220 KW h Z tmi (mi : Molten iron produced).
- Example 4 The briquette-shaped compact used in Example 1 was not charged into the rotary hearth furnace (iron oxide was not previously reduced), but was charged into the heating electric furnace 9 used in Example 2. Under the same conditions as in Example 2, molten titanium slag and molten iron were produced from the compact. The composition of the obtained molten iron was C: 4.0% hot metal. The composition of the titanium slag T i ⁇ 2: 6 90%.. Examination of the inside of the furnace revealed damage to some of the furnace wall refractories. The power consumption for the arc heating electrode in this example was about 340 KW h Z tmi (mi: molten iron produced). ) Example 4
- the prepcket-shaped compact used in Example 1 was reduced in a rotary hearth furnace 8 and then subjected to a melting process.
- the inside of the rotary hearth furnace 8 is divided into two parts by a partition plate (reduction section / melting section).
- the iron oxide was reduced under the same conditions as in Example 1 above, and then melted (atmosphere temperature of 130-
- the molten iron and titanium slag produced were cooled to about 100,000 and solidified, and then discharged outside the furnace by a discharger (about from raw material charging to discharge). 8 to 15 minutes.)
- the obtained reduced iron had a high iron grade (iron content: about 96%).
- Matachi Tansuragu is high titanium content (T i ⁇ 2: 70%) had.
- the separation residue obtained in the centrifugal separation step when producing titanium oxide using the sulfuric acid method was used as a raw material for titanium oxide and iron oxide.
- the main composition of the residue Total F e: 1 5 ⁇ 2 0%, H 2 SO 4: 1 0 ⁇ : 1 5%, M g: 1 ⁇ 2%, T i ⁇ 2: 4-7 % And other balance.
- Iron and magnesium were oxidized in the residue after removing the water and volatile components by roasting the residue. Residue after this roasting
- the reduction treatment of iron oxide can be performed in a short time, so that the reduction ratio of iron oxide can be increased while suppressing the reduction of titanium dioxide.
- the thus obtained raw material for producing titanium slag of the present invention has a low iron oxide content and can suppress a decrease in the furnace temperature due to a reduction reaction of iron oxide, so that the electric power required for maintaining the furnace temperature is reduced. Consumption can also be reduced. Also, as a result of reducing the amount of molten FeO generated, damage to the refractory in the furnace can be suppressed. Moreover, since it is not necessary to maintain the inside of the furnace in a highly reducing atmosphere as before, the reduction of titanium oxide can be suppressed. Furthermore, when the raw material for producing titanium slag of the present invention is heated, melting is started in a short time, so that titanium oxide slag can be efficiently produced without the problem of reduction of titanium oxide due to long-term residence. .
- titanium slag can be efficiently produced from a substance containing titanium oxide and iron oxide, such as ilmenite ore.
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- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Tunnel Furnaces (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2462831A CA2462831C (en) | 2002-10-08 | 2003-08-29 | Method for manufacturing titanium oxide-containing slag |
UA20040604383A UA77989C2 (en) | 2002-10-08 | 2003-08-29 | Method for producing titanium containing slag (variants) |
AU2003261814A AU2003261814B2 (en) | 2002-10-08 | 2003-08-29 | Method for producing titanium oxide containing slag |
BRPI0306566-9A BR0306566B1 (pt) | 2002-10-08 | 2003-08-29 | mÉtodo para fabricar escària contendo àxido de titÂnio. |
EP03799416A EP1437420A4 (en) | 2002-10-08 | 2003-08-29 | PROCESS FOR PRODUCING SCORIE CONTAINING TITANIUM OXIDE |
KR1020047008782A KR100645618B1 (ko) | 2002-10-08 | 2003-08-29 | 산화티탄 함유 슬래그의 제조 방법 |
US10/495,577 US20050028643A1 (en) | 2002-10-08 | 2003-08-29 | Method for producing titanium oxide containing slag |
NO20042204A NO20042204L (no) | 2002-10-08 | 2004-05-27 | Fremgangsmate for fremstilling av titanoksidholdig slagg |
US11/936,549 US8088195B2 (en) | 2002-10-08 | 2007-11-07 | Method for manufacturing titanium oxide-containing slag |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002294830A JP4153281B2 (ja) | 2002-10-08 | 2002-10-08 | 酸化チタン含有スラグの製造方法 |
JP2002/294830 | 2002-10-08 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10495577 A-371-Of-International | 2003-08-29 | ||
US11/936,549 Continuation US8088195B2 (en) | 2002-10-08 | 2007-11-07 | Method for manufacturing titanium oxide-containing slag |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004033730A1 true WO2004033730A1 (ja) | 2004-04-22 |
Family
ID=32089193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/011003 WO2004033730A1 (ja) | 2002-10-08 | 2003-08-29 | 酸化チタン含有スラグの製造方法 |
Country Status (16)
Country | Link |
---|---|
US (2) | US20050028643A1 (ja) |
EP (1) | EP1437420A4 (ja) |
JP (1) | JP4153281B2 (ja) |
KR (1) | KR100645618B1 (ja) |
CN (2) | CN1306044C (ja) |
AU (1) | AU2003261814B2 (ja) |
BR (1) | BR0306566B1 (ja) |
CA (1) | CA2462831C (ja) |
MX (1) | MXPA04005098A (ja) |
MY (1) | MY140955A (ja) |
NO (1) | NO20042204L (ja) |
RU (1) | RU2004117592A (ja) |
TW (1) | TWI298350B (ja) |
UA (1) | UA77989C2 (ja) |
WO (1) | WO2004033730A1 (ja) |
ZA (1) | ZA200402650B (ja) |
Cited By (2)
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CN109306386A (zh) * | 2018-08-29 | 2019-02-05 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种用于高炉冶炼的高钛高铝渣系 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01252712A (ja) * | 1988-03-31 | 1989-10-09 | Nippon Steel Corp | 浴融還元炉の操業方法 |
JP2001064733A (ja) * | 1999-08-26 | 2001-03-13 | Toshio Nasu | 金属酸化物の還元方法,製錬方法,および超微細結晶粒金属の製造方法 |
US20010052272A1 (en) * | 1992-08-11 | 2001-12-20 | Schoukens Albert F.S. | Production of high titania slag from ilmenite |
US20020022208A1 (en) * | 2000-08-07 | 2002-02-21 | Kawasaki Steel Corporation | Method and apparatus for charging raw and carbonaceous materials into a moving hearth furnace |
US20020033075A1 (en) * | 2000-06-28 | 2002-03-21 | Midrex International B.V. | Method of producing iron nuggets |
US20020053307A1 (en) * | 2000-10-31 | 2002-05-09 | Natsuo Ishiwata | Method for discharging reduced product from a moveable-hearth furnace and a discharging device |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB641738A (en) * | 1946-11-18 | 1950-08-16 | Titan Company As | Improvements in or relating to the separation of iron and titanium compounds from ores containing iron and titanium |
GB1008407A (en) * | 1960-12-06 | 1965-10-27 | Yawata Iron & Steel Co | Process for separating non-molten slag from titanium-containing iron sands |
US3765868A (en) * | 1971-07-07 | 1973-10-16 | Nl Industries Inc | Method for the selective recovery of metallic iron and titanium oxide values from ilmenites |
US3865574A (en) * | 1972-07-20 | 1975-02-11 | Lummus Co | Process for the production of low-sulfur prereduced iron pellets |
US4701214A (en) * | 1986-04-30 | 1987-10-20 | Midrex International B.V. Rotterdam | Method of producing iron using rotary hearth and apparatus |
ZA935072B (en) | 1992-08-11 | 1994-02-07 | Mintek | The production of high titania slag from ilmenite |
CN1135946A (zh) | 1995-05-15 | 1996-11-20 | 昆明西山焊条材料厂 | 电焊条用还原钛铁矿粉的制取方法 |
KR100327848B1 (ko) * | 1996-11-11 | 2002-08-19 | 스미토모 긴조쿠 고교 가부시키가이샤 | 환원철의제조방법및장치 |
KR200171628Y1 (ko) | 1996-12-19 | 2000-04-01 | 정몽규 | 자동차용 패키지 트레이지지 구조 |
JPH10195513A (ja) * | 1996-12-27 | 1998-07-28 | Kobe Steel Ltd | 金属鉄の製法 |
US5997606A (en) * | 1997-08-11 | 1999-12-07 | Billiton Sa Limited | Production of titanium slag |
KR20010032730A (ko) * | 1997-12-03 | 2001-04-25 | 제이. 더리크 | 산화철 환원 및 철 용융 방법과 그 설비 |
EP0952230A1 (en) * | 1998-03-24 | 1999-10-27 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Method of producing reduced iron agglomerates |
JP2997459B1 (ja) * | 1998-11-04 | 2000-01-11 | 株式会社神戸製鋼所 | 還元鉄塊成物の製造方法 |
AUPP442698A0 (en) | 1998-07-01 | 1998-07-23 | Technological Resources Pty Limited | A direct smelting process |
US6685761B1 (en) * | 1998-10-30 | 2004-02-03 | Midrex International B.V. Rotterdam, Zurich Branch | Method for producing beneficiated titanium oxides |
US6413295B2 (en) * | 1998-11-12 | 2002-07-02 | Midrex International B.V. Rotterdam, Zurich Branch | Iron production method of operation in a rotary hearth furnace and improved furnace apparatus |
US6126718A (en) * | 1999-02-03 | 2000-10-03 | Kawasaki Steel Corporation | Method of producing a reduced metal, and traveling hearth furnace for producing same |
CN1219891C (zh) * | 1999-05-06 | 2005-09-21 | 株式会社神户制钢所 | 直接还原法及回转炉床炉 |
US6419714B2 (en) * | 1999-07-07 | 2002-07-16 | The Lubrizol Corporation | Emulsifier for an acqueous hydrocarbon fuel |
US6306195B1 (en) * | 2000-03-24 | 2001-10-23 | Council Of Scientific And Industiral Research | Process for the preparation of high grade synthetic rutile and pig iron |
PE20020070A1 (es) * | 2000-03-30 | 2002-02-05 | Midrex Internat B V | Metodo de producir hierro metalico y dispositivo de alimentacion de materia prima |
TW562860B (en) * | 2000-04-10 | 2003-11-21 | Kobe Steel Ltd | Method for producing reduced iron |
US6550596B2 (en) * | 2000-06-29 | 2003-04-22 | Usui Kokusai Sangyo Kaisha Limited | Externally controlled fan coupling device |
US6648942B2 (en) * | 2001-01-26 | 2003-11-18 | Midrex International B.V. Rotterdam, Zurich Branch | Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus |
CN1478908A (zh) * | 2002-08-29 | 2004-03-03 | 中国科学院过程工程研究所 | 一种分离铁和钛制备高钛渣的方法和装置 |
-
2002
- 2002-10-08 JP JP2002294830A patent/JP4153281B2/ja not_active Expired - Fee Related
-
2003
- 2003-08-29 CA CA2462831A patent/CA2462831C/en not_active Expired - Fee Related
- 2003-08-29 US US10/495,577 patent/US20050028643A1/en not_active Abandoned
- 2003-08-29 RU RU2004117592/02A patent/RU2004117592A/ru not_active Application Discontinuation
- 2003-08-29 WO PCT/JP2003/011003 patent/WO2004033730A1/ja active Application Filing
- 2003-08-29 UA UA20040604383A patent/UA77989C2/uk unknown
- 2003-08-29 AU AU2003261814A patent/AU2003261814B2/en not_active Ceased
- 2003-08-29 EP EP03799416A patent/EP1437420A4/en not_active Withdrawn
- 2003-08-29 KR KR1020047008782A patent/KR100645618B1/ko not_active IP Right Cessation
- 2003-08-29 CN CNB038017024A patent/CN1306044C/zh not_active Expired - Fee Related
- 2003-08-29 BR BRPI0306566-9A patent/BR0306566B1/pt not_active IP Right Cessation
- 2003-08-29 CN CNA2006101432366A patent/CN1936027A/zh active Pending
- 2003-09-26 TW TW092126590A patent/TWI298350B/zh not_active IP Right Cessation
- 2003-10-03 MY MYPI20033784A patent/MY140955A/en unknown
-
2004
- 2004-04-05 ZA ZA200402650A patent/ZA200402650B/en unknown
- 2004-05-27 NO NO20042204A patent/NO20042204L/no not_active Application Discontinuation
- 2004-05-27 MX MXPA04005098A patent/MXPA04005098A/es unknown
-
2007
- 2007-11-07 US US11/936,549 patent/US8088195B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01252712A (ja) * | 1988-03-31 | 1989-10-09 | Nippon Steel Corp | 浴融還元炉の操業方法 |
US20010052272A1 (en) * | 1992-08-11 | 2001-12-20 | Schoukens Albert F.S. | Production of high titania slag from ilmenite |
JP2001064733A (ja) * | 1999-08-26 | 2001-03-13 | Toshio Nasu | 金属酸化物の還元方法,製錬方法,および超微細結晶粒金属の製造方法 |
US20020033075A1 (en) * | 2000-06-28 | 2002-03-21 | Midrex International B.V. | Method of producing iron nuggets |
US20020022208A1 (en) * | 2000-08-07 | 2002-02-21 | Kawasaki Steel Corporation | Method and apparatus for charging raw and carbonaceous materials into a moving hearth furnace |
US20020053307A1 (en) * | 2000-10-31 | 2002-05-09 | Natsuo Ishiwata | Method for discharging reduced product from a moveable-hearth furnace and a discharging device |
Non-Patent Citations (1)
Title |
---|
See also references of EP1437420A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105063360A (zh) * | 2015-08-14 | 2015-11-18 | 北京神雾环境能源科技集团股份有限公司 | 处理低钛料的方法和系统 |
CN109306386A (zh) * | 2018-08-29 | 2019-02-05 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种用于高炉冶炼的高钛高铝渣系 |
Also Published As
Publication number | Publication date |
---|---|
AU2003261814B2 (en) | 2009-01-22 |
CN1936027A (zh) | 2007-03-28 |
CN1602363A (zh) | 2005-03-30 |
UA77989C2 (en) | 2007-02-15 |
EP1437420A4 (en) | 2007-08-22 |
MXPA04005098A (es) | 2004-08-19 |
US20080069763A1 (en) | 2008-03-20 |
BR0306566B1 (pt) | 2013-04-24 |
CA2462831C (en) | 2010-11-30 |
ZA200402650B (en) | 2004-10-21 |
AU2003261814A1 (en) | 2004-05-04 |
KR100645618B1 (ko) | 2006-11-14 |
JP2004131753A (ja) | 2004-04-30 |
KR20040064730A (ko) | 2004-07-19 |
US20050028643A1 (en) | 2005-02-10 |
TWI298350B (en) | 2008-07-01 |
JP4153281B2 (ja) | 2008-09-24 |
CN1306044C (zh) | 2007-03-21 |
US8088195B2 (en) | 2012-01-03 |
EP1437420A1 (en) | 2004-07-14 |
RU2004117592A (ru) | 2005-06-10 |
TW200406490A (en) | 2004-05-01 |
MY140955A (en) | 2010-02-12 |
BR0306566A (pt) | 2004-11-30 |
CA2462831A1 (en) | 2004-04-08 |
NO20042204L (no) | 2004-05-27 |
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