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EP2336371B1 - Procédé d'exploitation d'un haut fourneau utilisant des boulets carbonés non cuits - Google Patents

Procédé d'exploitation d'un haut fourneau utilisant des boulets carbonés non cuits Download PDF

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Publication number
EP2336371B1
EP2336371B1 EP09819299.0A EP09819299A EP2336371B1 EP 2336371 B1 EP2336371 B1 EP 2336371B1 EP 09819299 A EP09819299 A EP 09819299A EP 2336371 B1 EP2336371 B1 EP 2336371B1
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EP
European Patent Office
Prior art keywords
fired pellets
carbon
containing non
pellets
fired
Prior art date
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EP09819299.0A
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German (de)
English (en)
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EP2336371A4 (fr
EP2336371A1 (fr
EP2336371B8 (fr
Inventor
Kenichi Higuchi
Takashi Shinohara
Takeshi Noda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel and Sumitomo Metal Corp
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/007—Conditions of the cokes or characterised by the cokes used
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates

Definitions

  • the present invention relates to a method of operating a blast furnace comprising producing carbon-containing non-fired pellets which are increased in self-reducibility by the contained carbon and charging them in the blast furnace together with other main materials from the furnace top so as to selectively improve the low reactivity locations in the furnace and decrease the reducing agent ratio of the blast furnace.
  • iron-containing materials are successively charged from the furnace top so as to be layered with coke lumps inside the blast furnace. Further, at this time, to promote the reduction of the iron-containing materials in the furnace and reduce the gas permeation resistance in the high temperature melting state, the general practice has been to mix small grain or medium grain small coke lumps with the iron-containing materials.
  • the reduction speed is the slowest at the stage of reduction from wustite (FeO) to iron (Fe).
  • This reaction occurs in the 800°C or higher temperature region of the blast furnace shaft.
  • This reaction is governed in speed by the size of the gasification reaction of the coke, where effect of the gas composition is great and which occurs at a temperature near 1000°C (solution loss reaction).
  • Carbon-containing non-fired pellets comprised of fine grains of carbonaceous materials and iron oxide in close proximity are not only superior in reducibility as carbon-containing pellets themselves, but also contain a certain amount or more of carbon content, so it is known that the high coke reactivity enables the iron-containing materials to be strikingly improved in reducibility.
  • Blast furnace-use iron-containing material uses powdered iron ore of about 2 to 3 mm average particle size as the main iron-containing material. To this, limestone, silica, and other secondary materials, powdered coke, anthracite, and other carbonaceous materials are mixed. Furthermore, water is added and the result mixed and granulated to form pseudo particles. After that, a sintering machine is used to heat and sinter the particles, using the carbonaceous material in the raw materials, to obtain sinter ore. This is now the mainstream.
  • the pseudo particles of the sintering materials in this method are mainly granulated matter comprised of coarse particles of a particle size of about 1 mm or more as nuclei and fine particles of a particle size of about 0.5 to less than 1 mm adhered around them. These pseudo particles maintain the gas permeability of the layer charged with sintering materials in the sintering machine and promote a good sintering reaction. For this, enough cold strength is required so as not to be crushed when the sintering materials are charged and, further, while being heated, dried, and sintered.
  • a drum mixer is used to mix the sintering materials and form them into particles.
  • iron-containing dust obtained by collecting the sintering dust, blast furnace dust, etc. produced in large amounts in the iron-making process and, furthermore, sludge, scale, and other fine powder dust (these in general called “iron-making dust") and pellet feed or other fine powder materials are also used as iron-containing materials.
  • fine powder particles of a particle size of 0.25 mm or less account for 80% or more of the total, so when using these as sintering materials, problems easily arise such as reduction of the gas permeability of the charged material layer due to the fine powder particles and reduction of the productivity.
  • a mixer is used to mix the iron-containing material and secondary materials, with the addition of water, then a disk pelletizer or other granulating machine having a higher granulating strength compared with a drum mixer is used to produce spherical raw pellets mainly comprised of fine powder particles of a particle size of 0.25 mm or less, after that, an external heating type sintering machine using combustion gas etc. as the heat source is used for sintering to produce fired pellets.
  • carbon-containing non-fired pellets for blast furnace-use which are obtained by mixing iron oxide-bearing materials and carbon-based carbonaceous materials together, adding a binder, then kneading, shaping, and curing the result, which contain 80 to 120% of the theoretical amount of carbon required for reducing the iron oxide of the iron ore to obtain metal iron, and which are selected in binder, shaped, and cured so as to give an ordinary temperature crushing strength of 7850 kN/m 2 (80 kg/cm 2 ) or more and a method of production of the same have been proposed (for example, see PLT 2).
  • the C content contained in the non-fired pellets is limited to not more than 120% of the theoretical amount of carbon required for reducing the oxide ore to metal iron (below sometimes called the "C equivalent") (by total carbon content (TC), not more than 120% corresponding to not more than 15 mass%). If increasing the C content over this, there was the problem of the cold crushing strength and hot strength of the non-fired pellets being impaired.
  • carbonaceous material-containing non-fired pellets which are comprised of a carbonaceous material and iron ore and which are defined in relationship between the maximum fluidity at the time of softening and melting of the carbonaceous material and the ratio of iron oxide particles of 10 ⁇ m or less size in the iron ore so as to obtain superior reducibility and strength after reduction in the carbonaceous material-containing non-fired pellets have been proposed (for example, see PLT 3).
  • the carbonaceous material in the carbonaceous material-containing non-fired pellets softens and melts in the 260 to 550°C temperature region, then solidifies so as to make the molten carbonaceous material penetrate and solidify in the spaces between the iron oxide particles, increase the contact area of the carbonaceous material and iron oxide, and improve the heat conductivity and raise the reduction efficiency and also so as to strengthen the bonds between iron oxide particles to improve the strength after reduction (hot strength).
  • the mixture is hot shaped in the 260 to 550°C temperature region at which the carbonaceous material softens and melts, then solidifies, the iron oxide particles are strongly connected by the carbonaceous material to obtain briquettes of an apparent density of 2.3 g/cm 3 or more, then these are degasified to drive out the volatiles from the carbonaceous material, whereby the strength of the briquettes is raised and cracking due to swelling of the briquettes during reduction is prevented.
  • this method requires hot briquetting and degasification treatment, so the energy consumption at the time of production is high and the production costs rise. In this point, it is an economically disadvantageous method. Further, compared with the granulation method, the density of the briquettes becomes higher, so the briquettes easily burst due to gasification of the carbonaceous material in them or CO and CO 2 gas produced in the reduction reaction of the iron oxide.
  • carbonaceous material-containing non-fired pellets of a two-layer structure comprised of a core of a carbonaceous material of a particle size of 3 to 25 mm and an outer circumferential layer surrounding the core of a mixture of an iron material of a particle size of 1 mm or less and a carbonaceous material, wherein the volume percentage of the carbonaceous material of the core is 0.2 to 30 vol% of the pellets as a whole, the content of the carbonaceous material in the outer circumferential layer is 5 to 25 wt%, and the total carbon content in the pellets as a whole is a high 25 to 35 mass%, have been proposed (for example, see PLT 5).
  • the carbonaceous material of the particle size of 1 mm or less contained in the outer circumferential layer is used to reduce the iron oxide.
  • the carbonaceous material of the core is made to function as a carburization source. Due to this, it is possible to improve the reducibility in the blast furnace and also improve the drip behavior of the molten pig due to the carburization action and to decrease the fuel ratio at the time of blast furnace operation and reduce the gas permeation resistance at the melting zone.
  • pellets which are comprised of a two-layer structure of different particle sizes and compositions of carbonaceous material and oxides and which have a total carbon content of a high 25 mass% or more have the problem of a lower cold wear strength. Further, to produce pellets which have such a special two-layer structure, the production process becomes complicated, a large amount of binder becomes necessary for maintaining strength, etc. This method was disadvantageous from the viewpoint of the productivity and cost at the time of production.
  • carbon-containing non-fired pellets can be improved in cold crushing strength to a certain extent, but in the reduction temperature region of the blast furnace, the above binder undergoes a dehydration reaction, so sufficient hot strength cannot be maintained.
  • the fired pellets form metal shells (dense layers of iron formed by sintering of reduced iron at surface) due to the strong topochemical reaction during the reduction process where the reducing gas causes reduction from the surface of the pellets, so compared with sinter ore, are harder to reduce in the 1000°C or higher high temperature region. A large amount of melt is discharged at the start of fusing.
  • sinter ore In current general blast furnace operation, sinter ore is mainly used.
  • the ratio is 70 to 90% in range.
  • the ratio of the fired pellets is 5 to 20% or so.
  • the quality of iron ore is becoming lower. Due to ore grading, iron ore is increasingly being provided as fine powder.
  • the drop in product yield and productivity due to the lower gas permeability when producing sinter ore using fine powder iron ore is becoming a problem.
  • the present invention in consideration of the above state of the prior art, has as its object to provide a method of operating a blast furnace, in blast furnace operation using a large amount of fired pellets as an iron-containing material, which mixes carbon-containing non-fired pellets with the fired pellets to charge them in proximity with the fired pellets with their inferior reducibility so as to eliminate locations of delayed reduction in the vicinity of a melting zone in the furnace and obtain a thin melting zone structure, to thereby achieve a large effect of decrease of the specific consumption of fuel during blast furnace operation.
  • the inventors measured the ingredients forming blast furnace-use iron-containing materials such as sinter ore, fired pellets, and lumps of ore for high temperature behavior and engaged in an intensive study, by experiments etc., on the changes in high temperature behavior when mixing predetermined amounts of carbon-containing non-fired pellets in these.
  • the present invention was made to solve the above problems and has as its gist the following.
  • powder iron ore which is inexpensive but is inferior in quality, as a material to efficiently produce fired pellets and to greatly reduce the reducing agent ratio (coke ratio) at the time of blast furnace operation when using fired pellets. This enables effective utilization of resources, energy conservation, and lower CO 2 output.
  • the inventors used a load softening test apparatus able to simulate the reaction inside a blast furnace so as to study the changes in the ratio of carbon-containing non-fired pellets with reducibility in various types of iron-containing charges.
  • FIG. 1 is a cross-sectional view of a load softening test apparatus.
  • a lower electric furnace 6 and an upper electric furnace 5 are connected by a flange to form an integral structure.
  • the lower electric furnace 6 is provided for preheating the reducing gas, while the upper electric furnace 5 is used for heating a sample 3.
  • Iron ore or another sample 3 is charged into a crucible, then set inside a reaction tube.
  • the sample 3 is charged between an upper and a lower layer of coke in the crucible.
  • Reducing gas which has been adjusted in advance to a predetermined composition and flow rate is introduced from a reducing gas inlet 7 into the reaction tube, is preheated in the lower electric furnace 6, then is introduced into the sample 3 in the crucible.
  • the gas after the reaction is exhausted from a reaction gas outlet 2. Part of this exhaust gas is sampled and analyzed for ingredients by a gas analyzer. The reduction rate is calculated from the analysis values of this exhaust gas.
  • thermocouple 4 is used to measure the temperature of the part right above the sample 3.
  • the gas pressures at the reducing gas inlet 7 and the reaction gas outlet 2 are also measured. From the pressure difference, the gas permeation resistance of the sample 3 is measured.
  • the load applying device 1 is used to apply any load to the sample 3 to simulate the load conditions in an actual furnace. The shrinkage behavior of the sample 3 obtained as a result is measured. Note that, in the figure, 8 indicates a liquid drop container, while 9 indicates a liquid drop detector.
  • FIG. 2 shows the measurement results.
  • the sinter ore and fired pellets used in an actual furnace were screened to an average particle size of 10 to 15 mm, then were respectively uniformly mixed with carbon-containing non-fired pellets for use as samples.
  • the carbon-containing non-fired pellets were produced by mixing iron-containing dust, carbon-containing dust, and fast hardening Portland cement in predetermined amounts, then granulating the mixture by a pan pelletizer, after that, curing for two weeks out in the open.
  • the carbon-containing non-fired pellets were comprised of carbon 25% and T.Fe 45% and had a carbon equivalent of 2.0.
  • the peak reduction rates of the sinter ore and the fired pellets at 1200°C were improved. If comparing the two, first, the fired pellets are lower in reduction rate.
  • the inventors engaged in an in-depth study of the mixing ratio of carbon-containing non-fired pellets to fired pellets for reducing the specific consumption of fuel at the time blast furnace operation.
  • the reduction stage of fired pellets and carbon-containing non-fired pellets charged as part of the iron-containing material layer into a blast furnace is generally divided into the following three stages ((1) to (3)). The consumed C/O at the different stages are calculated.
  • O is the total (mol) of the amount of reduced oxygen of the fired pellets and carbon-containing non-fired pellets
  • C is the amount of C (mol) derived from the carbon-containing non-fired pellets
  • C/O expresses the amount of carbon derived from the carbon-containing non-fired pellets required for reduction of the amount of oxygen derived from the fired pellets to be reduced.
  • the oxygen to be reduced in the carbon-containing non-fired pellets is reduced in the regions of (2) and (3) by the carbon in the carbon-containing non-fired pellets, so around the carbon-containing non-fired pellets, the molar ratio C/O has to be 0.6.
  • the carbon-containing non-fired pellets are mainly comprised of carbon C and iron oxide Fe 2 O 3 , but contains ash content derived from the iron-containing dust and carbon-containing dust, gangue ingredients derived from cement, and water of crystallization due to the cement hydration reaction to a total of an extent of 20 to 30%.
  • the ingredients of the carbon-containing non-fired pellets are expressed by [C/O] (molar ratio).
  • the inventors investigated the effects of the C content on the strength after reaction of the carbon-containing non-fired pellets.
  • the inventors investigated the crushing strength after heating carbon-containing non-fired pellets having various C contents under conditions of 900°C and CO/CO 2 7/3 for 1 hour. As shown in FIG. 5 , along with the rise in the C content C, the strength after the reaction fell. From the NPLT “ Tetsu to Hagane 72 (1986), S98 ", in the blast furnace, the carbon-containing pellets have to be maintained at 10 kg/piece or more, but the inventors learned that if the C content C is larger than 30%, 10 kg/piece cannot be maintained. Accordingly, the upper limit of the C content C in the present invention is made 30%.
  • the inventors next intensively studied the optimal range of the specific consumption R of carbon-containing non-fired pellets (kg/tp) for decreasing the reducing agent ratio. If the carbon content Y of the carbon-containing non-fired pellets is less than 15% (C/O corresponds to 1.0), the effect of improvement of the reaction efficiency of the indirect reduction and melt (direct) reduction of the above formula (2) becomes lower. As a result, compared with use of ordinary coke, it becomes difficult to sufficiently decrease the reducing agent ratio.
  • the mixing ratio of carbon-containing non-fired pellets and fired pellets is adjusted so that the ratio R (kg/tp)/P(kg/tp) of the specific consumption R of the carbon-containing non-fired pellets (kg/tp) and the specific consumption P of the fired pellets (kg/tp) satisfies the above formula (9).
  • the inventors studied in depth the range of the specific consumption P of the fired pellets. If the specific consumption P of the fired pellets is less than 150 kg/tp, the blast furnace charge becomes mainly sinter ore and ore lumps. Their reaction characteristics end up governing the results of the blast furnace operation. Even if the reducibility of the charged fired pellets is improved by the nearly charged carbon-containing non-fired pellets, the contribution to the overall operation ends up becoming relatively small.
  • the degree of segregation of fired pellets at the time of charging becomes greater and even the carbon-containing non-fired pellets are not enough to cover for the detrimental effects.
  • the specific consumption P of the fired pellets (kg/tp) is made 150 to 650 kg/tp. This corresponds to a ratio of fired pellets of 10 to 40%.
  • the range of the specific consumption R of the carbon-containing non-fired pellets corresponds to 14 to 202 kg/tp.
  • the inventors investigated the change in the reducing agent ratio due to the amounts of use of fired pellets and carbon-containing non-fired pellets in a blast furnace of an effective volume of 5500 m 3 .
  • the quality of the sinter ore was substantially constant.
  • Operation was performed to give a tapping ratio of 2.1 to 2.2 (t/d/m 3 ).
  • the reducing agent ratio rose along with an increase in the specific consumption P of the fired pellets.
  • the reducing agent ratio was kept to 485 (kg/tp) or less.
  • the particle size of the carbon-containing non-fired pellets used is not particularly limited in the present invention, but to promote uniform mixing with the fired pellets and to suppress a drop in the gas permeability of the carbon-containing non-fired pellets due to crushing, the average particle size is preferably made 20 mm or less.
  • the method of charging the carbon-containing non-fired pellets into the blast furnace preferably comprises alternately charging iron-containing material and coke in layers from the top of the blast furnace during which mixing the fired pellets and the carbon-containing non-fired pellets in advance before charging and charging the mixture of the above carbon-containing non-fired pellets and the above fired pellets so as to replace part of the above iron-containing material layer.
  • the carbon-containing non-fired pellets of the present invention are not particularly limited in shape or method of production.
  • a method of forming raw pellets using a pan pelletizer is used, but similar effects can be obtained even if using the method of forming briquettes enabling press-forming.
  • the carbon-containing non-fired pellets of the present invention are not particularly limited in material conditions either.
  • iron-containing dust, coke-containing dust, etc. are mainly used, but even if blending in iron ore, scale, etc., substantially similar effects can be obtained.
  • P1 Iron-containing dust, carbon-containing dust, and quick curing Portland cement were used as materials to produce two types of carbon-containing non-fired pellets P1 and P2.
  • P1 had a C content of 23%, a C/O of 2.0, and a gangue ingredient of 25%.
  • P2 had a C content of 28%, a C/O of 2.8, and a gangue ingredient of 25%.
  • Table 1 shows the conditions of use of the carbon-containing non-fired pellets and fired pellets and the results of evaluation of blast furnace operation. As will be understood from Table 1, when using carbon-containing non-fired pellets P1, with Comparative Example 1 with an amount of use of carbon-containing non-fired pellets smaller than the amount of use of fired pellets, operation with a reducing agent ratio of 485 (kg/tp) or less was not possible.
  • Comparative Example 2 conversely had an amount of use of carbon-containing non-fired pellets too much greater than the amount of use of fired pellets so the reducing agent ratio ended up rising. Again, operation with a reducing agent ratio of 485 (kg/tp) or less was not possible.
  • Comparative Example 3 had an amount of use of carbon-containing non-fired pellets of 45 (kg/tp) or an amount of use the same as the Invention Example 1, yet was insufficient in amount of fired pellets and could not decrease the reducing agent ratio.
  • Comparative Example 4 conversely had an excessively large ratio of carbon-containing non-fired pellets, so again the reducing agent ratio trended high.
  • the present invention greatly contributes to industry and society.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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  • Manufacture Of Iron (AREA)

Claims (2)

  1. Procédé d'exploitation d'un haut fourneau utilisant des boulets carbonés non cuits, dans lequel un matériau contenant du fer et du coke sont alternativement chargés en couches à partir du sommet du haut fourneau, ledit procédé étant caractérisé par le fait qu'il comprend les étapes suivantes consistant à :
    (i) mélanger à l'avance des boulets carbonés non cuits et des boulets cuits et charger un mélange desdits boulets carbonés non cuits et desdits boulets cuits de manière à remplacer une partie de ladite couche de matériau contenant du fer et
    (ii) ajuster un rapport de mélange desdits boulets carbonés non cuits et desdits boulets cuits de manière à ce qu'un rapport R (kg/tp) / P (kg/tp) d'une consommation spécifique R desdits boulets carbonés non cuits (kg/tp) et une consommation spécifique P desdits boulets cuits (kg/tp) devient 0,09 à 0,31.
  2. Procédé d'exploitation d'un haut fourneau utilisant des boulets carbonés non cuits selon la revendication 1, caractérisé par le fait que ladite consommation spécifique P des boulets cuits est de 150 kg/tp à 650 kg/tp.
EP09819299.0A 2008-10-10 2009-10-09 Procédé d'exploitation d'un haut fourneau utilisant des boulets carbonés non cuits Active EP2336371B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008264483 2008-10-10
PCT/JP2009/067948 WO2010041770A1 (fr) 2008-10-10 2009-10-09 Procédé d’exploitation d’un haut fourneau utilisant des boulets carbonés non cuits

Publications (4)

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EP2336371A1 EP2336371A1 (fr) 2011-06-22
EP2336371A4 EP2336371A4 (fr) 2017-05-03
EP2336371B1 true EP2336371B1 (fr) 2019-01-02
EP2336371B8 EP2336371B8 (fr) 2019-04-24

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JP (1) JP4603628B2 (fr)
KR (1) KR101211302B1 (fr)
CN (1) CN102177256B (fr)
BR (1) BRPI0920547B1 (fr)
UA (1) UA97916C2 (fr)
WO (1) WO2010041770A1 (fr)

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JP6350101B2 (ja) * 2013-10-22 2018-07-04 新日鐵住金株式会社 炭素高反応性装入物の装入量決定方法及びこれを用いた高炉操業方法
CN104313306B (zh) * 2014-10-15 2016-08-10 中冶长天国际工程有限责任公司 一种烧结矿固体燃料单位消耗量的测量方法及装置
JP6696376B2 (ja) * 2016-09-13 2020-05-20 日本製鉄株式会社 高炉の操業方法
CN111638316B (zh) * 2020-05-29 2022-09-16 鞍钢股份有限公司 一种模拟高炉高温段焦炭反应装置及方法
CN112609030A (zh) * 2020-12-11 2021-04-06 四川德胜集团钒钛有限公司 一种钒钛磁铁矿的高炉冶炼方法
CN115368042B (zh) * 2022-08-19 2023-09-08 深圳市考拉生态科技有限公司 一种利用氟石膏与石英废石生产多孔性硅灰石球粒的方法

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KR20110051292A (ko) 2011-05-17
CN102177256B (zh) 2013-08-21
WO2010041770A1 (fr) 2010-04-15
EP2336371A4 (fr) 2017-05-03
KR101211302B1 (ko) 2012-12-11
RU2011117324A (ru) 2012-11-20
JP4603628B2 (ja) 2010-12-22
UA97916C2 (ru) 2012-03-26
BRPI0920547A2 (pt) 2020-08-11
CN102177256A (zh) 2011-09-07
EP2336371A1 (fr) 2011-06-22
BRPI0920547B1 (pt) 2021-09-28
JPWO2010041770A1 (ja) 2012-03-08
EP2336371B8 (fr) 2019-04-24

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