WO1996000800A1 - Procede de fabrication d'acier fritte - Google Patents

Procede de fabrication d'acier fritte Download PDF

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Publication number
WO1996000800A1
WO1996000800A1 PCT/JP1995/001301 JP9501301W WO9600800A1 WO 1996000800 A1 WO1996000800 A1 WO 1996000800A1 JP 9501301 W JP9501301 W JP 9501301W WO 9600800 A1 WO9600800 A1 WO 9600800A1
Authority
WO
WIPO (PCT)
Prior art keywords
raw material
heating
hot air
microwave
sintering
Prior art date
Application number
PCT/JP1995/001301
Other languages
English (en)
Japanese (ja)
Inventor
Yohzoh Hosotani
Norimitsu Konno
Hiroki Nakai
Akifumi Umezu
Original Assignee
Nippon Steel Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corporation filed Critical Nippon Steel Corporation
Priority to EP95923548A priority Critical patent/EP0767242B1/fr
Priority to BR9508167A priority patent/BR9508167A/pt
Priority to DE69512520T priority patent/DE69512520T2/de
Priority to KR1019960707481A priority patent/KR100217892B1/ko
Priority to AU28068/95A priority patent/AU685959C/en
Publication of WO1996000800A1 publication Critical patent/WO1996000800A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C22B1/205—Sintering; Agglomerating in sintering machines with movable grates regulation of the sintering process
    • 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
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F27D2099/0028—Microwave heating

Definitions

  • the present invention relates to a method for producing high-quality sintered ore by rapidly drying and heating to a high temperature in a short time by a Dwyroid sintering machine in a method for producing a sintered ore used as a raw material for ironmaking.
  • Dwydroid type sintering machines are generally widely used.
  • this type of sintering machine the surface layer of the compounded raw material is ignited in the ignition furnace, and the combustion zone in the raw material layer gradually shifts from the upper part to the middle part and the lower part by inhaling downward.
  • the sintering process is completed in about 25 to 35 minutes.
  • the important thing in sinter production is to maintain the quality of the sinter to maximize the production rate and minimize the fuel consumption and ignition fuel consumption. It is to take. Therefore, in actual operation, the amount of coke and anthracite added as fuel and the amount of coke oven gas and pulverized coal used as ignition fuel should be reduced as long as the quality of the sintered ore can be maintained. good.
  • Japanese Patent Publication No. 54-24682 discloses that in a Dwight toroid type sintering machine, hot air is supplied between an ore feeding machine for supplying raw materials to a pallet and an ignition furnace. Install the device and check whether it is Hot air is blown onto the upper surface of the raw material to raise the temperature of only the upper layer of the raw material, and the upper layer of the heated raw material is sequentially ignited, thereby sintering while alleviating the thermal shock at the time of ignition. Sinter ore production method ". Although this method has the effect of increasing the production rate and reducing the unit consumption of coke at a constant drop strength, it is stated that the product yield is slightly reduced.
  • Japanese Patent Publication No. 57-45296 also states that in a sintering machine that sinters a raw material by igniting it from the top without forming a layer, a hot air supply device is installed between the ore feeder and the ignition furnace. Hot air is blown onto the upper surface to draw in air from below, and only the upper layer of the raw material is dried, and then ignited by the ignition furnace.A hot air supply device is installed after the ignition furnace, and sintering reaction is performed while blowing hot air from here and drawing in air from below. Sinter ore production method, which specializes in sintering.
  • This method simultaneously improves the incompatible factors of increasing the production rate, reducing the unit consumption of coke, improving the quality of sinter ore, and suppressing the generation of ⁇ , but only blowing hot air on the upper surface of the raw material before ignition States that product yields do not improve much. Disclosure of the invention
  • the suction amount of combustion air after ignition is reduced by reducing the thermal shock applied to the surface layer of the raw material in the ignition furnace and reducing the relative water condensation zone by expanding the drying zone.
  • the maximum temperature of the heat pattern in the upper layer of the preheated charge rises higher than without preheating, so that the production rate, product yield, and sinter quality are improved.
  • Fuel consumption and ignition fuel consumption are reduced.
  • an object of the present invention is to rapidly dry and heat to a high temperature in a short time without disintegrating pseudo particles in the surface layer of the raw material.
  • the pseudo-particles in the surface layer of the raw material are nuclei that are raw materials of sintered ore such as iron ore, coke, and limestone, which are coarse-grained raw materials obtained by adding water and rolling the raw materials in a mixing granulator (mixer) in advance. Fine particles adhere to the periphery of the particles and are granulated to form one pseudo particle.
  • sintering occurs as a result of melting of the attached particles of the pseudo-particles and the core particles, which are the raw materials, for an extremely short period of time, so that the sintering process is maintained without collapse even in the dry zone. It's important to.
  • sintering raw materials are granulated with water and a binder (sometimes not added) to produce pseudo particles. Fine particles adhere to each other, or fine particles adhere to coarse particles to increase the particle size.
  • the sintering material whose particle size has increased is filled to a specific height, and then sintered after forming a sintering bed. However, if the pseudo-particles collapse during the process of drying and heating the surface layer of the raw material, the fine powder fills the voids of the sintering raw material, impeding a uniform flow of air.
  • the method of sucking hot air creates a part where the air flows and a part where the air does not easily flow, so that unevenness occurs in the drying and heating width of the surface layer in the pallet width direction.
  • -It causes variation in sintering rate after ignition, hinders uniform firing and adversely affects yield improvement. Pseudo particles collapse Otherwise, uniform firing will be achieved, and the yield will be further improved.
  • the present inventors have conducted intensive studies on a means capable of drying and heating the surface layer portion of the sintering raw material to a high temperature in a short time without collapsing the pseudo particles, and as a result of high-frequency heating, particularly microwave alone or microwave and hot air It has been found that high quality sinter can be produced at a high yield by combining with supply.
  • the reason for using microwaves in the present invention is that heating from the outside of the object still did not solve the problem of quasi-particle collapse, so the surface layer of the sintering raw material itself was used as a heating element. From the idea, it is possible to heat the inside by using the polarization phenomenon, which is a unique property of microwaves. Moreover, by utilizing the advantage of high thermal efficiency in principle and heating in a short time compared to the input power, various conventional methods can be used. The problem was solved at once.
  • the present invention relates to a method for producing a sintered ore by charging a raw material in layers and igniting from the upper surface, wherein a microphone mouth wave generator is provided between the raw material charging device and an ignition furnace, and the surface layer portion of the raw material is microwaved. Ore, which is heated to 120-600 ° C, ignited in an ignition furnace, and then sintered, a sintered ore is manufactured by charging raw materials in layers and igniting from the top
  • a microphone mouth wave generator and a hot air supply device are installed between the raw material charging device and the ignition furnace, and the raw material surface layer is first heated to 50 to 200 ° C by microwaves, and then the hot air is heated.
  • Spray ore is heated to 150-600 ° C, then ignited in an ignition furnace, and then sintered.Sinter ore production is also characterized.
  • a method of manufacturing a method comprising: a microphone mouth wave generator and a heat source between a raw material charging device and an ignition furnace
  • This is a method for producing sinter characterized in that a wind supply device is provided, a microphone mouth wave and hot air are simultaneously blown onto the surface layer of the raw material, heated to 150 to 600 ° C, and then sintered.
  • Microwave heating can rapidly exude 6-7 wt% of the water inside the compounded material to the ore surface without disintegrating the granulated pseudo-particles. Therefore, the unevenness of the drying / heating / heating width of the raw material surface portion in the pallet width direction after ignition is reduced, and the combined raw material on the raw material surface portion on the pallet can be quickly preheated to a high temperature.
  • the surface layer portion of the raw material refers to a range within 1/10 of the thickness of the raw material layer in the thickness direction from the surface of the raw material layer (normally about 350 to 500 mm).
  • the reason why the microphone mouth-wave heating may be limited to the surface layer of the raw material was determined for the following reasons.
  • the surface layer that immediately sucks in cooling air (or exhaust gas) has insufficient temperature rise and lacks heat. . If the maximum temperature of the surface layer, which is about 1 to 10 times the thickness of the raw material layer, can be increased by microwaves or the like, the yield in that part will be improved. And since the heat is transmitted to the lower layer one after another, it is necessary to improve the maximum temperature, heat level, and yield of the upper and middle layers of the sintered layer (the lower layer has an excessively high heat level even in the conventional method and thus has little improvement effect). Become. Since the heat input to the surface layer is sequentially propagated to the layer immediately below it, microwave heating can be performed only on the surface layer.
  • the microwave used for drying, heating, and heating the surface layer portion of the raw material on the pallet 2450 MHz and 915 MHz are permitted as ISN bands, and either one can be selectively used. Also, in order to secure the required amount of energy, for example, multiple microphone mouth wave generators with an applied voltage of 5 kW or 25 kW are installed, and the microphone mouth waves from each generator are collected and irradiated by a waveguide. do it.
  • the optimal range of microwave irradiation on the surface layer of the raw material on the pallet is 10 to 200 kW / m 2 . At less than 10 kW / m 2 , the heating effect by the microwave is not seen, and at more than 200 kW / m 2 , the heating effect by the microwave reaches a plateau.
  • the optimum temperature of the hot air blown to the raw material on the pallet is 150 to 600 ° C, and the blowing (suction) speed of the hot air is 0.3 to 3.0 m / sec. If the hot air temperature is lower than 150 ° C, the effect of drying and heating is not sufficiently obtained, and if the temperature exceeds 600 ° C, the heating effect reaches a plateau. If the blowing speed of the hot air is less than 0.3 m / sec, the effect of drying and heating is not seen.If the blowing speed is more than 3.0 m / sec, adverse effects such as shrinkage of the raw material on the pallet due to the increase of the blowing pressure become remarkable. .
  • the reason for irradiating the microwave before the hot air is blown onto the surface layer of the raw material on the pallet is that the microwave heating rapidly and quickly causes the moisture inside the pseudo-particles of the mixed raw material such as ore, limestone, and coke to reach the surface of the pseudo-particles. This is because the pseudo particles can be exuded without disintegration. Even if microwave heating and hot air blowing are performed at the same time, the bleeding of pseudo-particles observed during heating by hot air can be prevented because the moisture in the mixture is quickly exuded by microwave heating.
  • Simultaneous heating of microphone mouth-wave and hot-air blowing is more effective in preventing the pseudo-particles from collapsing because the water that seeps onto the surface of the pseudo-particles is quickly evaporated.
  • the method of irradiating a microwave with microwaves after blowing the hot air onto the surface layer of the raw material on the pallet has a drawback that a part of the mixed raw material pseudo-particles is collapsed at the stage of hot air heating.
  • the hot-air heating method dries moisture from the outside of the pseudo-particles, so that when the internal water comes out to the surface of the pseudo-particles, a part of the dried raw material is destroyed.
  • the permeability of the sintering bed is deteriorated, and the sintering time is prolonged, resulting in a reduction in production rate.
  • moisture inside the pseudo particles first absorbs the microwave to generate heat, and the moisture is reduced. Since it first comes out on the surface of the pseudo-particle, it does not disintegrate the surface of the pseudo-particle which is in a wet state. Even if the moisture of the quasi-particles is dried by microphone mouth-wave heating and then heated with hot air, the quasi-particles do not collapse because the water does not evaporate.
  • the microphone mouth wave and hot air are to be used sequentially, heat to 50 to 200 ° C by microwave first, then to 150 to 600 ° C by hot air.
  • microwaves heating can be rapid, but at temperatures above 200 ° C, the energy input increases.
  • the heating rate is not fast, so that the pseudo particles in which the moisture has already evaporated do not break down and are heated to 150 to 60 ° C with less input energy.
  • the heating temperature with hot air was set to 150 to 600 ° C, because the heating at less than 150 ° C matched the input energy. No effect can be obtained, and heating at over 600 ° C stops the heating effect.
  • the surface layer of the raw material exceeds 150 ° C, the combined effect of microphone mouth-wave heating and hot air blowing becomes remarkable, but when the temperature is lower than 150 ° C, the effect is small.
  • the temperature of the surface layer of the raw material exceeds 600 ° C., a part of the raw material is excessively heated by the microwave, and the pseudo-particles of the raw material begin to collapse.
  • the heating temperature of the surface layer of the raw material is particularly preferably 200 to 450 ° C.
  • the surface layer of the raw material is heated uniformly in advance and then ignited by the ignition furnace, the progress from the upper layer to the lower layer of the combustion zone in the raw material layer can be made uniform in the width direction of the raw material layer. Quality can be improved.
  • FIG. 1 is a schematic view of an example of equipment for carrying out the present invention, in which a sintering compounding raw material 1 is continuously supplied from a surge hopper 2 to a pallet 6 via a drum feeder 13 and a raw material packaging device 5, and Layered in pallet 6.
  • the sprocket 4 on the raw material supply side is rotated to move the pallet 6 at a predetermined speed, and a plurality of wind boxes 8, a main duct 9, and an exhaust gas collector installed below the pallet 6
  • the air is sucked in by the suction blower 13.
  • a continuous operation at a rate controlled to ignite the upper surface of the laminated raw material 7 in the ignition furnace 14 and complete the sintering reaction over all layers until the laminated raw material 7 on the pallet 6 reaches the mining section.
  • the microphone mouth-wave generator 15 or the microphone mouth-wave generator 15 and the hot-air supply unit 16 are installed in the room.
  • the laminated raw material 7 stacked on the pallet 6 is heated and heated in accordance with the irradiation energy amount and time of the irradiated microwave.
  • the hot air supply device 16 includes hot air discharged from an exhaust pipe 18 of a cooler 17 which is a part of a sintering process, and exhaust gas of 100 ° C or more discharged from a wind box 8.
  • the hot air obtained from the exhaust gas introduction pipe 10 through the flow control valve 11, the exhaust gas dust collector 12 ′, and the suction probe 13 ′ can be introduced.
  • the hot air supply device 16 may simultaneously supply the hot air discharged from the cooler 17 and the exhaust gas of 100 ° C. or higher discharged from the wind box, or may supply each of them independently. However, it is also possible to mix the two in advance and supply hot air at a predetermined temperature.
  • Examples of the combination of the microphone mouth wave irradiation and the hot air blowing include the above-described microphone mouth wave generator 15 alone, the microphone mouth wave generator 15 and the hot air supply device 16 arranged in series, Although not shown, it is also possible to adopt a mode in which microphone mouth wave generators are arranged in the first half of the hot air supply device 16 or at predetermined intervals in the longitudinal direction of the pallet 6. Heating and heating the laminated material 7 on the pallet 6 by microwave irradiation can be controlled by adjusting the amount of microwave irradiation energy, or by using a microphone mouth wave to the laminated material 7 moving at a predetermined speed. The methods for adjusting the irradiation area can be used alone or in combination. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a diagram showing an example of an apparatus for carrying out the method of the present invention.
  • Fig. 2a shows the production rate, sintering time and product yield in the examples and comparative examples
  • Fig. 2b shows the cold strength (SI), low-temperature reduction powdering index (RDI), It is a figure which shows a generation amount basic unit.
  • SI cold strength
  • RDI low-temperature reduction powdering index
  • Table 1 shows the proportions of the ingredients used. Blending raw materials various iron ores and limestone, quicklime, serpentinite, Si0 2, AI2O3 5.8%, respectively in sintered ore miscellaneous raw materials such as scale, adjusted to 1.8%, salt Motodo to 1.7 It was compounded so that it might become. The ratio of returned ore was set at 15% based on the total of 100 new raw materials, and the ratio of coke was set at 4.0% based on the total of 100 new materials.
  • Example 1 After returning ore and blending coke flour into the blended raw material, add 6 to 7 wt% of added water Then, the mixture was mixed and granulated by a mixer, placed in a 50 kg test pan, and adjusted to a layer thickness of 500 mm and a negative pressure of 1200 mmAq. Regarding heating by the microphone mouth wave or the microphone mouth wave and hot air, the method of drying and heating the surface layer of the raw material before ignition of the Dwight toroid type sintering machine was simulated. In Example 1, the ignition time was set to 1.5 minutes, and the surface layer of the raw material before ignition was heated to 150 ° C by irradiating a 10 kW microwave for 1.0 minute before ignition.
  • Example 3 after heating the material surface portion to 380 ° C by irradiating, simultaneously sucked for 1.0 minute and 300 e C hot air microphone port wave 10kW before ignition and ignition 1.5 minutes.
  • the temperature of the hot air, the hot air suction time, and the heating time by the microphone mouth wave are not limited to the above, and the heating time by the microwave is 0.2 to 1.5 minutes, which is more effective. Inhaling hot air at ⁇ 400 ° C for 0.5 to 3 minutes was more effective.
  • Comparative example 1 is a conventional method without drying and heating before ignition.
  • Comparative example 2 is that a hot air of 300 ° C is sucked in for 1.0 minute before ignition, and then a microwave of 10 kW is irradiated for 1.0 minute with a microphone mouth wave for 1.0 minute. The method of heating the part was carried out.
  • Comparative Example 2 For each of Comparative Example 2, Examples 1, 2, and 3, the raw material of the surface layer of the dried and heated sintering raw material was sampled before ignition, particles of 0.5 or less were sieved, and the weight was measured. Was calculated. In Comparative Example 2, the ratio of particles of 0.5 mm or less was 8.0% to 9.0%, but in Examples 1, 2, and 3, the ratio was 1.0% or less.
  • Fig. 2a shows the results of the pot tests, sintering time and product yield of the pot tests obtained in Examples 1, 2 and 3, and Comparative Examples 1 and 2. Further, examples Figure 2 b 1, 2 and 3, Comparative Examples 1 and 2 obtained in cold strength (SI), low temperature reduction degradation index (RDI) and N0 X emissions per unit Each is shown.
  • FuelN0 x that occurs in the sintering process is mainly as N0 X occurs becomes high temperature are well known being suppression ( The opposite phenomenon to ThermalNO x ). It is considered that the present invention raises the maximum temperature of the upper and middle layers (the layer where a large amount of NOx is generated) especially in the sintered layer, and thus reduces the amount of NOx generated.
  • the product yield is greatly improved, the production rate is improved, the SI and RDI are improved, and ⁇ the unit consumption of emissions is significantly reduced as compared with the conventional method.
  • the combination of microwave power, heating and heating time, hot air temperature and hot air suction time may be changed depending on the operation orientation, and this freedom is also an advantage of the method of the present invention.
  • the present invention simultaneously provides an incompatible improvement effect, and the effect is extremely large.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Procédé de fabrication d'acier fritté de grande qualité, caractérisé en ce que l'on place un générateur de micro-ondes entre l'unité de chargement de matière première d'une machine de frittage du type Dwight-Lloyd et le four d'amorçage de celle-ci. Selon le procédé, (1) on utilise uniquement des micro-ondes pour porter une partie superficielle de la matière première à une température comprise entre 120 et 600 °C, ou (2) on utilise les micro-ondes pour porter la partie superficielle de la matière première à une température comprise entre 50 et 200 °C, puis on utilise un vent chaud aspiré pour la porter à une température comprise entre 150 et 600 °C, ou bien (3) on utilise à la fois les micro-ondes et le vent chaud pour porter la partie superficielle de la matière première à une température comprise entre 150 et 600 °C, à la suite de quoi on effectue le séchage/chauffage/frittage de la partie superficielle de la matière afin de la porter rapidement à une température élevée sans provoquer de rupture des pseudo-particules présentes dans la partie superficielle de la matière frittée.
PCT/JP1995/001301 1994-06-29 1995-06-29 Procede de fabrication d'acier fritte WO1996000800A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95923548A EP0767242B1 (fr) 1994-06-29 1995-06-29 Procede de fabrication de minerai fritte
BR9508167A BR9508167A (pt) 1994-06-29 1995-06-29 Processo para produção de minério sinterizado
DE69512520T DE69512520T2 (de) 1994-06-29 1995-06-29 Herstellungsverfahren für gesintertes erz
KR1019960707481A KR100217892B1 (ko) 1994-06-29 1995-06-29 소결광의 제조 방법
AU28068/95A AU685959C (en) 1994-06-29 1995-06-29 Sintered steel manufacturing process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/168609 1994-06-29
JP16860994A JPH0814763A (ja) 1994-06-29 1994-06-29 焼結鉱製造方法

Publications (1)

Publication Number Publication Date
WO1996000800A1 true WO1996000800A1 (fr) 1996-01-11

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Application Number Title Priority Date Filing Date
PCT/JP1995/001301 WO1996000800A1 (fr) 1994-06-29 1995-06-29 Procede de fabrication d'acier fritte

Country Status (7)

Country Link
EP (1) EP0767242B1 (fr)
JP (1) JPH0814763A (fr)
KR (1) KR100217892B1 (fr)
CN (1) CN1048758C (fr)
BR (1) BR9508167A (fr)
DE (1) DE69512520T2 (fr)
WO (1) WO1996000800A1 (fr)

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JP5831413B2 (ja) * 2011-09-15 2015-12-09 新日鐵住金株式会社 マイクロ波乾燥装置及びマイクロ波乾燥方法
KR101398345B1 (ko) * 2012-04-27 2014-05-22 주식회사 포스코 유도가열방식을 이용한 소결장치 및 방법
JP6225433B2 (ja) * 2013-03-07 2017-11-08 新日鐵住金株式会社 乾燥炉及び乾燥方法
KR101439243B1 (ko) * 2013-07-25 2014-09-11 주식회사 포스코 수분이 함유된 철광석의 소결장치
KR20170040826A (ko) 2015-10-05 2017-04-14 주식회사 포스코 소결광 제조장치 및 제조방법
CN107504825B (zh) * 2017-08-10 2019-06-04 武汉钢铁有限公司 低NOx生成的烧结工艺
CN113804000A (zh) * 2020-06-17 2021-12-17 宝山钢铁股份有限公司 高炉块矿微波热废气组合加热干燥系统和方法
CN115804244A (zh) * 2020-06-17 2023-03-14 淡水河谷公司 利用微波加热物料的装置、利用微波加热物料的方法和利用微波加热物料的系统
CN114427793B (zh) * 2022-01-11 2023-01-17 北京科技大学 一种交替式连续循环的烧结减污降碳系统

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JPH06212293A (ja) * 1993-01-12 1994-08-02 Nippon Steel Corp 焼結鉱製造方法

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CN114136095A (zh) * 2021-11-25 2022-03-04 昆明理工大学 一种烧结机微波点火装置

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DE69512520D1 (de) 1999-11-04
AU2806895A (en) 1996-01-25
EP0767242A4 (fr) 1997-09-17
EP0767242A1 (fr) 1997-04-09
AU685959B2 (en) 1998-01-29
DE69512520T2 (de) 2000-05-04
EP0767242B1 (fr) 1999-09-29
BR9508167A (pt) 1997-08-12
JPH0814763A (ja) 1996-01-19
CN1048758C (zh) 2000-01-26
CN1154147A (zh) 1997-07-09
KR100217892B1 (ko) 1999-09-01

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