WO2003010342A1 - Procede permettant d'accelerer la separation de fer metallique granulaire de laitier - Google Patents
Procede permettant d'accelerer la separation de fer metallique granulaire de laitier Download PDFInfo
- Publication number
- WO2003010342A1 WO2003010342A1 PCT/JP2002/005996 JP0205996W WO03010342A1 WO 2003010342 A1 WO2003010342 A1 WO 2003010342A1 JP 0205996 W JP0205996 W JP 0205996W WO 03010342 A1 WO03010342 A1 WO 03010342A1
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- WO
- WIPO (PCT)
- Prior art keywords
- slag
- iron
- metallic iron
- quenching
- cooling
- Prior art date
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0086—Conditioning, transformation of reduced iron ores
-
- 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
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/06—Conveyors on which slag is cooled
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
Definitions
- the present invention relates to a method for promoting separation of generated granular metallic iron and by-product slag when reducing and melting a raw material agglomerate containing an iron oxide-containing substance and a carbonaceous reducing agent to produce metallic iron.
- a raw material agglomerate containing an iron oxide-containing substance and a carbonaceous reducing agent to produce metallic iron.
- the raw material agglomerate is supplied to a reduction melting furnace, and the iron oxide in the agglomerate is reduced, melted and agglomerated, and the solidified mixture of the resulting granular metallic iron and slag as a by-product is formed. It relates to an improved method so that the material can be easily separated into granular metallic iron and slag.
- Methods for producing such high-grade metallic iron include a direct iron making method in which iron ore and iron oxide-containing substances such as iron oxide are directly reduced with a carbon material and a reducing gas, such as a shaft furnace method, to obtain metallic iron.
- a direct iron making method in which iron ore and iron oxide-containing substances such as iron oxide are directly reduced with a carbon material and a reducing gas, such as a shaft furnace method, to obtain metallic iron.
- a reducing gas such as a shaft furnace method
- Japanese Patent Application Laid-Open No. 2000-2000 discloses an ironmaking method in which a raw material agglomerate containing an iron oxide-containing substance such as iron ore and iron oxide and a carbonaceous reducing agent such as coke is reduced and melted to obtain high-purity metallic iron.
- No. 1 4 4 2 2 4 is known.
- the raw material agglomerate is kept in a solid state while maintaining the solid state.
- the iron oxide in the material is reduced, and then the metallic iron and by-products
- the slag melts and agglomerates.
- the molten metallic iron and the molten slag are cooled (for example, first cooling for cooling to about 110 to 900 ° C), the molten metallic iron and the molten slag are solidified (the “granular state”, respectively). Metal iron "and” slag grains ").
- the granular metallic iron and slag particles are discharged out of the furnace.
- the granular metallic iron and slag particles are allowed to cool (second cooling). Further, the granular metallic iron and the slag particles are sorted by an arbitrary sorting means, and only the granular metallic iron is used as a raw material for melting in a steelmaking furnace or the like.
- the cooling in the metal iron production method as described above consists of a first cooling stage in which the metal iron and slag are cooled to below their freezing point in order to solidify the metal iron and slag, and a second cooling step in which the temperature is further lowered for subsequent transportation and sorting of the metal iron. Divided into a cooling stage.
- the first cooling step is often performed in the reduction melting furnace, but after the first cooling, there is a case where the slag particles are present in an unseparated state (referred to as “mixed solid matter”) attached to the granular metallic iron. Many.
- mixed solid matter an unseparated state attached to the granular metallic iron.
- metallic iron and slag are separated, but not enough. For this reason, it is difficult to efficiently separate and collect only granular metallic iron with a magnetic separation sieve or the like, and a considerable amount of slag is inevitably mixed with the granular metallic iron. Therefore, even if the metallic iron itself is of high purity, the amount of slag generated in the steelmaking furnace increases due to slag components that are inseparably mixed and affect operability and product quality. Under these circumstances, there is a need for a technology that can efficiently separate metallic iron and by-product slag before separation.
- the present invention which has solved the above-mentioned problems, relates to a method for producing granular metallic iron by reducing and melting a raw material agglomerate containing an iron oxide-containing substance and a carbonaceous reducing agent, the method comprising the steps of:
- This is a method for accelerating the separation of granular metal iron and slag, which has the gist of quenching a solid mixture of iron and by-product slag to promote the separation of the granular metal iron and by-product slag.
- FIG. 1 is a schematic explanatory view illustrating a circular moving bed type reduction melting furnace to which the present invention is applied.
- FIG. 2 is a cross-sectional equivalent view taken along the line AA in FIG.
- FIG. 3 is an explanatory cross-sectional view showing a development in the moving bed rotation direction in FIG.
- FIG. 4 is a schematic explanatory view showing cooling of a mixed solid by water spray.
- FIG. 5 is a schematic explanatory view showing cooling of a mixed solid by submersion.
- FIG. 6 is a schematic explanatory view showing cooling of a mixed solid by nitrogen gas.
- FIG. 7 is a schematic explanatory view showing cooling of a mixed solid by water.
- the inventors of the present invention have conducted intensive studies to solve the problems in the above prior art, and found that granular metallic iron generated by reduction melting of a raw material agglomerate containing an iron oxide-containing substance and a carbonaceous reducing agent was reduced.
- the present inventors have found that rapid cooling of the mixed solid with the by-produced slag significantly promotes the separation of the granular metallic iron from the by-produced slag.
- the raw material agglomerates include an iron oxide-containing substance such as iron ore or iron oxide or a partially reduced product thereof, and a carbonaceous reducing agent such as coke or coal, and any additives as necessary. Etc. may be included.
- the shape of the raw material agglomerate is not particularly limited, and examples thereof include a pellet-shaped and a pricket-like shaped body.
- any method can be adopted according to the shape of the agglomerate.
- the mixing ratio between the iron oxide-containing substance and the carbonaceous reducing agent is not particularly limited, and can be a mixing ratio according to the purpose.
- the size of the raw material agglomerate is not particularly limited.
- granular metallic iron is produced by reducing and melting such a raw material agglomerate, but the specific reduction and melting method is not particularly limited, and a known reduction and melting furnace may be used.
- a method for producing metallic iron using a moving hearth-type reduction-melting furnace will be described.
- FIGS. 1 to 3 are schematic explanatory views showing an example of a moving hearth type reduction melting furnace developed by the present inventors to which the present invention is applied.
- the dome type structure having a donut-shaped rotating moving floor is shown in FIGS. Fig. 1 is a schematic drawing
- Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1
- Fig. 3 is developed in the rotating direction of the rotary hearth in Fig. 1 for easy understanding.
- 1 is a rotary hearth
- 2 is a furnace body covering the rotary hearth
- the rotary hearth 1 is rotatable at an appropriate speed by a driving device (not shown). It is configured.
- the configuration of the moving hearth type reduction melting furnace to which the present invention is applied is not limited to those having the shape and structure as shown in FIGS. 1 to 3 as a matter of course. As long as it includes, it can be effectively used for a moving hearth type reduction melting furnace of any other structure such as a straight great type.
- a plurality of combustion parners 3 are provided at appropriate places on the wall surface of the furnace body 2, and the combustion heat of the combustion parner 3 and the radiant heat thereof are transmitted to the raw material agglomerates on the rotary hearth 1 to form Heat reduction is performed.
- Furnace body 2 the illustrated shows a preferred example, the furnace body 2 inside section three partition walls ⁇ , kappa 2, kappa 3 in the first zone second zone Zeta 2, Zone 3 Zeta 3, 4 is partitioned into zones Zeta 4, together with the rotating direction of the most upstream side of the furnace body 2 material feed means 4 facing the rotary hearth 1 are placed, the direction of rotation downstream side (rotating structure der because The discharge means 6 is provided at the position immediately upstream of the supply means 4).
- the rotary hearth 1 In operating the reduction melting furnace, the rotary hearth 1 is rotated at a predetermined speed, and the raw material agglomerate is supplied onto the rotary hearth 1 from the supply means 4 to have an appropriate thickness. To go.
- the raw material agglomerate charged on the hearth 1 receives combustion heat and radiant heat from the combustion parner 3 in the process of moving through the first zone, and generates carbonaceous material in the agglomerate and the combustion generated by the combustion.
- the iron oxide in the agglomerate is reduced by heating with the carbon oxide while maintaining the solid state. Thereafter, further heat reduction in a second zone Zeta 2, metallic iron generated is almost completely reduced and melted to carburization by heating under further reducing atmosphere in the third zone Zeta 3.
- the molten metal produced at this time and the molten slag produced as a by-product are in a state in which the molten slag exists on the molten metal iron due to a difference in specific gravity.
- Such melting Fusion metallic iron and the molten slag is cooled to below the freezing point and respectively solidified by any cooling means C in the fourth zone Z 4, issued can sequentially ⁇ by the discharge means 6 provided on the downstream side.
- the molten metal iron and the molten slag are separated into granular metal iron and slag particles, but the slag and the metal iron are not separated and the granular metal iron to which the slag adheres (mixed metal iron). Solids) are also present.
- mixed solids granular metallic iron, slag particles and mixed solids are discharged outside the furnace.
- the mixed solids discharged at this time (hereinafter, when referred to as “mixed solids, etc.” also means granular iron metal and slag particles), is in a relatively high temperature state (for example, solidification temperature to 900 ° C.). ).
- the mixed solid discharged at a relatively high temperature is quenched, and the separation of the metallic iron and the slag is promoted by utilizing the difference between the contraction speed of the metallic iron constituting the mixed solid and the contraction speed of the slag. and, S i 0 2, a 1 2 0 3 to be included as such ash gangue component Ya carbonaceous material in granular metallic iron and slag particles containing little slag component (the iron ore used as the raw material, C a O Etc.).
- rapid cooling means faster cooling than the case where the mixed solid is allowed to cool in the atmosphere.
- metallic iron is used. Separation of slag and slag ⁇ It is recommended because it enhances the effect.
- the metal iron and the slag are rapidly cooled at a rate of 250 / min or more, the metal iron and the slag are suddenly changed (ie, the difference in the thermal expansion coefficient) between the shrinkage rate of the metal iron constituting the mixed solid and the shrinkage rate of the slag. This is desirable because distortion occurs at the contact area with the steel and the separation of metallic iron and slag is promoted.
- a more preferred cooling rate is over 350 minutes.
- the cooling rate may be calculated by continuously measuring the temperature change of the mixed solid discharged outside the furnace.
- the quenching method itself is not particularly limited, it is desirable to perform quenching using a liquid and / or an inert gas as a refrigerant. It is recommended that quenching with liquid be faster than quenching with inert gas because the cooling rate is faster and higher separation effect can be obtained.
- the liquid used at this time is not limited, and the presence or absence of an additive to the liquid is not limited. It is desirable to use water from the viewpoint of economy, safety and cooling efficiency.
- the inert gas is not particularly limited. It is desirable to use nitrogen gas from the viewpoint of economy and safety.
- water may be sprayed onto the mixed solid while adjusting the supply amount by an arbitrary spraying means such as a spray to obtain a desired cooling rate.
- an arbitrary spraying means such as a spray to obtain a desired cooling rate.
- Figure 4 As shown in the example, the mixed solids discharged from the moving hearth type furnace were placed on a moving means 9 such as a belt conveyor via a charging duct 8 and moved, and an arbitrary number of them were provided in an arbitrary section. Water may be sprayed from the spraying means 11 toward the mixed solid or the like. By the spraying, the mixed solid is rapidly cooled, and the difference in shrinkage speed promotes the separation of slag and metallic iron, thereby obtaining granular metallic iron and slag particles.
- water may be stored in a cooling tank, and the mixed solid may be rapidly cooled to a desired cooling rate by controlling the water temperature by supplying and discharging the water.
- a cooling tank 13 filled with water 12 through charging means 8 such as a charging duct.
- charging means 8 such as a charging duct.
- it may be taken out of the cooling tank by any carrying-out means such as a conveyor.
- the quenching method in which the mixed solid is submerged in this manner is desirable because the cooling rate is faster than the quenching method in which water is sprayed, and therefore the difference in shrinkage rate is large and a high separation rate can be obtained.
- the inert gas when quenching is performed using an inert gas such as nitrogen gas, the inert gas may be directly injected into the mixed solid, or the mixed solid may be exposed under an inert gas atmosphere. .
- the quenching method is not limited to these, and the quenching method can be appropriately combined and carried out.
- the mixed solid may be rapidly cooled by spraying water under a nitrogen gas atmosphere, or may be rapidly cooled under a nitrogen gas atmosphere after spraying water.
- the specific quenching start temperature is not particularly limited, but is usually discharged outside the furnace. Since the mixed solid or the like is in a solid state, it is desirable to rapidly cool at least a part of the temperature between the freezing point of metallic iron (about 1280) and 150 as a preferable quenching temperature range. This is because even if the mixture is rapidly cooled from a temperature of less than 150, a sufficient thermal shock is not applied to the mixed solid, and a sufficient separation effect may not be obtained.
- “at least a part” in the above range means that it is not necessary to continue quenching in the above temperature range. For example, when performing at least a cooling rate of 25 Ot, min or more in at least a part of the metal iron freezing point to 150, a part of the temperature range in the temperature range is rapidly cooled at a cooling rate of 25 O: min or more. That other temperature ranges may be allowed to cool. It does not mean that quenching must be continued between the iron freezing point and 15. The rapid cooling may be continued beyond the above range, and does not mean that the rapid cooling must be stopped when the temperature reaches 150. For example, the quenching may be carried out rapidly to the metal iron freezing point up to 15 and further quenching may be continued at a temperature lower than 15 Ot: and the quenching may be stopped when the desired temperature is reached.
- the quenching time may be extremely short, for example, several seconds.
- the purpose can be sufficiently achieved by quenching.
- quenching when quenching is performed using a refrigerant, the mixed solid is rapidly cooled at the moment when the mixed solid comes into contact with the refrigerant, and a separation promoting effect is obtained. For example, when the mixed solid is immersed in water, the temperature of the mixed solid suddenly drops at the moment of contact with water, causing strain fracture at the metal iron slag interface and separation.
- the quenching it is also preferable to use water for the quenching, stop the quenching of the metallic iron by 150, and let it cool thereafter. That is, after cooling the mixed solids and the like to 150 using water, the quenching is stopped (contact with water is stopped), and then the metal solid is cooled by self-heating of the metal iron itself. Since the moisture adhering to the metal can be evaporated, the metallic iron can be dried without providing a drying means such as a dryer.
- the method of the present invention has been described for the case where the mixed solid is rapidly cooled together with the granular metallic iron and the slag particles discharged from the smelting reduction furnace.
- the metallic iron and the slag are separated by means (eg, a sieve mesh / magnetic separator), and the granular metallic iron, slag granules, and the mixed solids are separately collected, and the mixed solids alone or the mixed solids and the granular metallic iron are separated.
- the method of the present invention can be applied by selective sampling, and the method of the present invention can be applied regardless of the presence or absence of granular iron metal and slag particles.
- the granular metallic iron and slag particles are separated by an arbitrary sorting means (such as a sieve mesh / magnetic separator). If the fractional sampling is carried out, a metal iron raw material with an ultimately iron purity of about 95% or more, more preferably about 98% or more and extremely low slag content Can be obtained.
- the raw material agglomerate containing iron ore and coal was supplied to the moving hearth type reduction melting furnace shown in Figs. 1 to 3, and the solid state of the agglomerate was maintained by combustion heat and radiant heat from a combustion parner. The state was reduced by heating (at a furnace temperature of 1300). Further, the mixture of metallic iron and by-product slag, which is heated and melted in a reducing atmosphere, is cooled to 1000 in a furnace, and the granular metallic iron, slag particles, The solids were discharged by discharge means provided on the downstream side in the hearth moving direction. The discharged mixed solids and the like were charged into a cooling tank to which the refrigerant shown in Table 1 was supplied via a charging duct, and was rapidly cooled.
- Fig. 6 shows the case where nitrogen is used as the refrigerant.
- Nitrogen gas was constantly supplied to the cooling tank (flow rate: 10 NmVhr), and the mixed solids were rapidly cooled while adjusting the flow rate of the nitrogen gas so that the cooling rate became 250 min.
- the flow rate was adjusted by discharging the supplied nitrogen gas from the exhaust duct 14.
- the temperature of the charge such as metallic iron
- the total amount of the mixed solids was measured (see “Amount of mixed solids” and “Slag unseparated rate” in Table 1).
- a thermocouple was inserted into the mixed solids pool accumulated in the cooling tank and the temperature was measured.
- Figure 7 shows the case where water is used as the refrigerant.
- Water was stored in the cooling tank in advance, and the mixed solids to be charged were cooled.
- the cooling rate was 350 Z minutes as a result of measuring the cooling rate by submerging separately.
- the temperature of the charge, such as the mixed solid reached room temperature, it was removed from the cooling bath at any time and the total amount of the mixed solid was measured.
- the cooling rate by submerging was separately measured.
- a thermocouple was inserted into the pool of the mixed solids heated to 100,000 by a heating furnace, and they were immersed in water to measure a cooling rate. Table 1 shows the results. table 1
- Total mass Kg is the mass of the mixed solid before each cooling start.
- the amount of mixed solids kg is the mass of the remaining mixed solids after each cooling.
- Reduction rate% (water-cooled slag unseparated rate%) / (nitrogen-cooled slag unseparated rate%)
- slag could be separated and removed from the mixed solid by using nitrogen or water as the refrigerant.
- the non-separation rate is lower when water is used as the refrigerant than when nitrogen is used as the refrigerant, indicating that the quenching means for submerging in water is a more preferable quenching means.
- the metal iron and the slag constituting the mixed solid discharged outside the furnace can be easily separated. According to the present invention, it is possible to obtain a slag-free metallic iron raw material having a high iron purity. High quality molten steel can be produced with high productivity.
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- Manufacturing & Machinery (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002311297A AU2002311297B2 (en) | 2001-07-24 | 2002-06-17 | Method for accelerating separation of granular metallic iron from slag |
EP02736124A EP1411135A4 (en) | 2001-07-24 | 2002-06-17 | PROCESS FOR ACCELERATING LAYER GRANULAR METAL IRON SEPARATION |
KR1020047000982A KR100660658B1 (ko) | 2001-07-24 | 2002-06-17 | 과립상 금속철과 슬래그의 분리 촉진 방법 |
US10/483,981 US20040168550A1 (en) | 2001-07-24 | 2002-06-17 | Method for accelerating separation of granular metallic iron from slag |
CA002448383A CA2448383A1 (en) | 2001-07-24 | 2002-06-17 | Method for accelerating separation of granular metallic iron and slag |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001223266A JP2003034813A (ja) | 2001-07-24 | 2001-07-24 | 粒状金属鉄とスラグの分離促進方法 |
JP2001-223266 | 2001-07-24 |
Publications (1)
Publication Number | Publication Date |
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WO2003010342A1 true WO2003010342A1 (fr) | 2003-02-06 |
Family
ID=19056630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2002/005996 WO2003010342A1 (fr) | 2001-07-24 | 2002-06-17 | Procede permettant d'accelerer la separation de fer metallique granulaire de laitier |
Country Status (10)
Country | Link |
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US (1) | US20040168550A1 (ja) |
EP (1) | EP1411135A4 (ja) |
JP (1) | JP2003034813A (ja) |
KR (1) | KR100660658B1 (ja) |
CN (1) | CN1533443A (ja) |
AU (1) | AU2002311297B2 (ja) |
CA (1) | CA2448383A1 (ja) |
RU (1) | RU2312899C2 (ja) |
TW (1) | TW533239B (ja) |
WO (1) | WO2003010342A1 (ja) |
Families Citing this family (7)
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EP1445335A4 (en) * | 2001-09-19 | 2008-06-18 | Nippon Steel Corp | COOLING DEVICE AND METHOD FOR COOLING REDUCED IRON MASSES |
JP3679084B2 (ja) * | 2002-10-09 | 2005-08-03 | 株式会社神戸製鋼所 | 溶融金属製造用原料の製造方法および溶融金属の製造方法 |
KR100768562B1 (ko) * | 2006-09-15 | 2007-10-19 | 주식회사 대진디엠피 | 엘이디 조명 장치 및 그 제어 방법 |
US8518146B2 (en) | 2009-06-29 | 2013-08-27 | Gb Group Holdings Limited | Metal reduction processes, metallurgical processes and products and apparatus |
JP2013227605A (ja) * | 2012-04-24 | 2013-11-07 | Kobe Steel Ltd | 金属鉄含有焼結体 |
KR101404440B1 (ko) * | 2013-10-25 | 2014-06-19 | 주식회사 세라메탈 | 폐원자재 재활용 처리 장치 |
JP6273891B2 (ja) * | 2014-02-20 | 2018-02-07 | 新日鐵住金株式会社 | 移動炉床炉による金属酸化物の還元方法及び還元装置 |
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TW562860B (en) * | 2000-04-10 | 2003-11-21 | Kobe Steel Ltd | Method for producing reduced iron |
US20020053307A1 (en) * | 2000-10-31 | 2002-05-09 | Natsuo Ishiwata | Method for discharging reduced product from a moveable-hearth furnace and a discharging 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 |
JP4669189B2 (ja) * | 2001-06-18 | 2011-04-13 | 株式会社神戸製鋼所 | 粒状金属鉄の製法 |
JP4266284B2 (ja) * | 2001-07-12 | 2009-05-20 | 株式会社神戸製鋼所 | 金属鉄の製法 |
TWI282818B (en) * | 2003-01-16 | 2007-06-21 | Kobe Steel Ltd | A rotary hearth furnace and iron production method thereby |
JP4167101B2 (ja) * | 2003-03-20 | 2008-10-15 | 株式会社神戸製鋼所 | 粒状金属鉄の製法 |
JP4167113B2 (ja) * | 2003-04-17 | 2008-10-15 | 株式会社神戸製鋼所 | 還元鉄の製造方法及び装置 |
-
2001
- 2001-07-24 JP JP2001223266A patent/JP2003034813A/ja active Pending
-
2002
- 2002-06-17 WO PCT/JP2002/005996 patent/WO2003010342A1/ja active Application Filing
- 2002-06-17 EP EP02736124A patent/EP1411135A4/en not_active Withdrawn
- 2002-06-17 CA CA002448383A patent/CA2448383A1/en not_active Abandoned
- 2002-06-17 KR KR1020047000982A patent/KR100660658B1/ko not_active IP Right Cessation
- 2002-06-17 CN CNA02811874XA patent/CN1533443A/zh active Pending
- 2002-06-17 AU AU2002311297A patent/AU2002311297B2/en not_active Ceased
- 2002-06-17 US US10/483,981 patent/US20040168550A1/en not_active Abandoned
- 2002-06-17 RU RU2004105153/02A patent/RU2312899C2/ru not_active IP Right Cessation
- 2002-07-24 TW TW091116447A patent/TW533239B/zh not_active IP Right Cessation
Patent Citations (3)
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JPH10158710A (ja) * | 1996-12-02 | 1998-06-16 | Sumitomo Metal Mining Co Ltd | 還元鉄ペレットの製造方法 |
JP2000212651A (ja) * | 1999-01-20 | 2000-08-02 | Kobe Steel Ltd | 還元鉄ペレットの製造方法 |
JP2001280631A (ja) * | 2000-03-31 | 2001-10-10 | Sumitomo Heavy Ind Ltd | ロータリーキルンから排出される溶融物の回収方法及びその装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1411135A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN1533443A (zh) | 2004-09-29 |
AU2002311297B2 (en) | 2008-07-10 |
EP1411135A4 (en) | 2007-08-22 |
JP2003034813A (ja) | 2003-02-07 |
RU2312899C2 (ru) | 2007-12-20 |
KR100660658B1 (ko) | 2006-12-21 |
US20040168550A1 (en) | 2004-09-02 |
EP1411135A1 (en) | 2004-04-21 |
CA2448383A1 (en) | 2003-02-06 |
TW533239B (en) | 2003-05-21 |
KR20040013155A (ko) | 2004-02-11 |
RU2004105153A (ru) | 2005-06-10 |
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