CN1250812A - Method for operating vertical blast furnace for making pig-iron - Google Patents

Method for operating vertical blast furnace for making pig-iron Download PDF

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Publication number
CN1250812A
CN1250812A CN99122129A CN99122129A CN1250812A CN 1250812 A CN1250812 A CN 1250812A CN 99122129 A CN99122129 A CN 99122129A CN 99122129 A CN99122129 A CN 99122129A CN 1250812 A CN1250812 A CN 1250812A
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China
Prior art keywords
carbide
refuse
solid fuel
furnace
blast furnace
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Pending
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CN99122129A
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Chinese (zh)
Inventor
山口安幸
渡边宗一郎
安川明生
寺园清己
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JFE Steel Corp
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Kawasaki Steel Corp
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Publication of CN1250812A publication Critical patent/CN1250812A/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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

Abstract

This invention provides an operation method for a shaft furnace to manufacture a pig iron wherein a part of an injected fuel is converted into refuse in order to reduce operation cost and provide a refuse processing method less harmful to the environment. A carbide of a solid fuel is preferably a carbide of a solid refuse derived fuel which is formed after the refuse is pulverized or pulverized and dried, and/or a carbide of the solid refuse derived fuel which is dried after the refuse is pulverized or pulverized and formed. The carbide pulverized to be <=150 mu m in grain size is blown into a blast furnace. The carbide of the solid refuse derived fuel is produced by adding coke as part of the raw material. The shaft furnace is a blast furnace. The carbide of the solid refuse derived fuel is blown into the shaft furnace raceway from a tuyere, preferably together with fine coke powder.

Description

Make the working method of the shaft furnace of the pig iron
The present invention relates to blast furnace etc. and make the working method of the shaft furnace of the pig iron, particularly provide a kind of part that will jet the fuel in the hard stove of making the pig iron to get and make the rubbish resultant, make in the reduction operation cost waste disposal method also little the harmful effect of environment.
As the shaft furnace of making the pig iron, blast furnace is known.Blast furnace is to take to be burnt by bottom air-supply, and with ore, coke, flux mix by top and drops into, and makes slag float to liquid level in cupola well, make metal be deposited to the bottom and separate, thus the equipment that carries out smelting.In the past,, but quite approach the limit in recent years for the reduction operation cost has carried out the reduction of burnup.Therefore people are just seeking to replace the fuel of the cheapness of coke.
On the other hand, in recent years, social concern has been concentrated in the processing of rubbish.That is, because therefore the occupation of land problem that faces in the construction of incineration treatment of garbage facility has carried out only combustiblerefuse being carried out sorting fragmentation, drying, shaping, and the exploitation of the environment-friendly garbage solid fuel technology of the utilization that energetically rubbish acted as a fuel.Solid fuel of refuse (RDF:Refuse Derived Fuel or WDF:waste Derived Fuel), be will be by the urban waste, household garbage, the combustiblematerials of sorting carries out fragmentation or pulverizing in industrial waste and the general waste, drying is shaped and the solid fuel of manufacturing, the perhaps broken or pulverizing with above-mentioned combustiblematerials, be shaped the dry and solid fuel made.Solid fuel of refuse generally has the calorific value of 4200～45kcal/kg.Always, solid fuel of refuse is by burning in coal charging type incinerator or thermopnore formula incinerator, carries out recovery of heat and effectively utilize in waste heat boiler.But present situation is, owing to strengthened the regulation to dioxin recently, thereby suffers from the processing of solution to smoke evacuation, and to the processing of the combustion ash that produced.
Always, solid fuel of refuse is gazed at as the alternative fuel of the coke of the shaft furnace of making the pig iron.But, because the direct coke for replacing of solid fuel of refuse is packed into, therefore there is (1) thermal value little, (2) are expanded easily and are hindered problems such as ventilation property in the stove, can not practicability.In addition, the shaft furnace of the manufacturing pig iron is more complete at the fume extractor that tackles environmental pollutions such as smoke evacuation.On the other hand, non-combustionmaterial and the combustion residue proportion than iron usually are little, therefore enter in the slag.Thereby, be favourable aspect the combustion ash for the treatment of refuse generation is handled.
Purpose of the present invention just is to address these problems, and a kind of do not produce Dioxins and combustion ash handling problem are provided, and effectively utilizes the working method cheaply of solid fuel of refuse.
The present invention is a kind of working method of shaft furnace, it is characterized in that, the carbide of solid fuel of refuse winding-up system is made in the coke turning motion district of shaft furnace of the pig iron.
And the carbide of wishing this solid fuel of refuse is with refuse breaking or pulverizing, after the drying, reshape the carbide of the solid fuel of refuse that obtains and/or with refuse breaking or pulverizing, after the shaping, the carbide of the dry again solid fuel of refuse that obtains, and the carbide of this solid fuel of refuse is pulverized the back jet, the particle diameter of the carbide of this solid fuel of refuse is below the 150 μ m, the carbide of this solid fuel of refuse adds coal and makes as part of raw materials, this shaft furnace is a blast furnace, and the carbide of this solid fuel of refuse jetted by blast-furnace tuyere, in addition, hope is carried out the winding-up and the coal dust of the carbide of this solid fuel of refuse simultaneously.
Fig. 1 shows blast-furnace equipment and the side elevational view of carbide powder blowing device one example of the present invention and the part sectional drawing of blast-furnace body.
Fig. 2 shows that the part of the side elevational view of blast-furnace equipment and carbide powder of the present invention, breeze blowing equipment one example and blast-furnace body is disconnected and schemes.
Fig. 3 shows carbide manufacturing process one example of solid fuel of refuse of the present invention and the schema of this carbide using method.
Fig. 4 shows another example of carbide manufacturing process of solid fuel of refuse of the present invention and the schema of this carbide using method.
Implement best mode of the present invention
Below illustrate in greater detail the present invention.
Problem when the inventor utilizes solid fuel of refuse to act as a fuel in order to solve in the shaft furnace of making the pig iron has been carried out research with keen determination, and the result has obtained following opinion (1), (2), thereby has finished the present invention.(1) utilization of the carbide of solid fuel of refuse
When effectively utilizing rubbish, use big as the calorific value of fuel, as can to suppress the solid fuel of refuse that dioxin generates carbide.
The carbonizing gas that is produced when making the carbide of solid fuel of refuse is because the high-temp combustion more than 1000 ℃ can make dioxin decompose fully.Meanwhile, the high-temperature steam that obtains in the heat extraction of combustion gases is reclaimed can be used as the thermal source that drying garbage is used when making solid fuel of refuse, and cooling-heating room is used with, heat supply water etc.
In addition, because the carbide of the solid fuel of refuse of use to be shaped making, make that carbide in the back step operation of carbide manufacturing is carried, loading and unloading, storage become easy.(2) effective utilization of the carbon material of the shaft furnace of the conduct manufacturing pig iron
(2-1) ash content in the carbide of solid fuel of refuse (combustion does not divide) is with effective utilization of the form of slags such as blast furnace slag.
Table 1 shows an example of the carbide proterties of solid fuel of refuse.
As shown in table 1, the have an appointment low heat value of 4000kcal/kg of the carbide of solid fuel of refuse.But ash content reaches 38wt% and is acting as a fuel when utilizing, and produces the handling problem of combustion ash, utilizes in the general industrial stove and has any problem.
The inventor considers, when the raw material of wood-charcoal that the carbide of solid fuel of refuse is made the shaft furnace of the pig iron as blast furnace etc. used, the ash content in the carbide (combustion divides) entered in the blast furnace slag, can effectively utilize with the form of blast furnace slag.Table 1
Ultimate analysis value (wt%) Low heat value (kcal/kg) Analysis Values (wt%)
????C ??H ??O Volatile matter Fixed carbon Ash content
????45 ??1 ??9 ????4018 ???14 ???48 ???38
(2-2) excellent results by the carbide of solid fuel of refuse being jetted bringing in the coke turning motion district of the shaft furnace of the manufacturing pig iron such as blast furnace.
According to the present invention, in the coke turning motion district that forms before the shaft furnace air port of the manufacturing pig iron such as blast furnace that the carbide of solid fuel of refuse is jetted, make near the blast furnace lower coke turning motion district form slag, and enter in the blast furnace slag by the ash content in the carbide of solid fuel of refuse (combustion does not divide).As a result, suppressed slag that the ash content in the carbide produces by coke turning motion district in the blast furnace by the fusion on the top band that drips, and drip in the cupola well accumulation slagging in cupola well by the height in coke turning motion district.
Therefore, according to the present invention, can under the situation that does not hinder ventilation property in the State of Blast Furnace, the ash content of the carbide of solid fuel of refuse be entered in the blast furnace slag as slag.
Promptly, the present invention is effectively utilized a part of surrogate of the coke that the carbide of solid fuel of refuse uses as volume in the shaft furnace of the manufacturing pig iron such as blast furnace, ash content in this carbide is entered in the blast furnace slag, can be with the form of blast furnace slag as the blast furnace cement material, concrete effectively utilizes with aggregate etc.
Fig. 1 has shown an example of blast-furnace equipment and rubbish carbide powder blowing device of the present invention by the part sectional drawing of side elevational view and blast-furnace body.
Among Fig. 1,1 expression blast-furnace body (blast furnace), 2 expression ore storage tanks, 3 expression coke storage tanks, 4 expression furnace roof raw material hoppers, 5 expression product distribution chutes, 6 expression loop pipes, 7 expression blowpipes, 8 expression air ports, 9 expression blast-furnace coke turning motion districts, the handling equipment of the carbide of 10 expression solid fuel of refuse (following also note is made carbide), the hopper of 11 expression solid fuel of refuse carbides, 12a, 12b12c represents open and close valve, 13 expression carbides are carried and are used pipe arrangement, 14 expression screw feeders, 15 expression pulverizers, 16a 16b represents air conveying gas blower, 17 expression air are carried and are used pipe arrangement, 18 expression fly-ash separators, 19 expression feeders, 20A represents the carbide powder bucket, 21 expression middle hoppers, 22 expression spray tanks, 23A represents that the carbide powder sprays pipe arrangement, 30 express metal trough, 30a represents the slag weir lock, 31 expression iron ladles, 32 expression slag ladles.The fusion band that drips, B region representation cupola well central coke, C region representation coke layer, D region representation ore layer, arrow ground f are represented in the a-quadrant 1The flow direction of expression furnace gas, arrow f 2The flow direction of expression melts (pig iron, slag), arrow F 3AThe measurement shoutage direction of expression carbide powder.
Blast furnace operating carries out in the following order.
By the furnace roof ore of packing into alternately, coke becomes stratiform.The hot blast of air-supply is passed through loop pipe 6 via blowpipe 7, and air port 8 is blown in the State of Blast Furnace, and the coke in the stove is burnt.The reducing gas that is taken place by coke burning is ore reduction, fusion.The molten iron of the molten state that generates in State of Blast Furnace and slag are regularly discharged by iron notch.Molten iron is separated by the dreg blocking weir lock 30a that is arranged in iron notch 30 ways with slag, accepts the pig iron by iron ladle 31 respectively, accepts slag by slag ladle 32.
In the present invention, by the equipment in blast-furnace coke turning motion district that the carbide powder is jetted of example shown in Figure 1, after the carbide of solid fuel of refuse pulverized, resulting crushed material (carbide powder) is jetted in blast-furnace coke turning motion district.
In the blowing device of example shown in Figure 1, the carbide (carbide) of the solid fuel of refuse that will make in the carbide manufacturing process of solid fuel of refuse described later stores in carbide hopper 11 by for example endless belt conveyor handling equipment 10.Store the carbide in hopper 11, when opening open and close valve 12a, via carrying with pipe arrangement 13, screw feeder 14 is supplied with pulverizer 15.After carbide is supplied with pulverizer 15 with specified amount, close open and close valve 12a, begin to pulverize.Preferred powder is broken into the following carbide powder of 150 μ m.Use is by the air conveying air of supplying with gas blower 16a, and with pipe arrangement 17, fly-ash separator 18, feeder 19 store in the carbide powder bucket 20A via air conveying.Fly-ash separator 18 is to be provided with for catching air conveying carbide powder.Store the carbide powder in carbide powder bucket 20A, store in winding-up jar 22 via middle hopper 21.Store the carbide powder in winding-up jar 22, use the air of supplying with gas blower 16b by air conveying,, jet in blast-furnace coke turning motion district 9 by air port 8 via winding-up pipe arrangement 23A.Jetting to blast-furnace coke turning motion district, 9 interior carbide powder carry out thermolysis rapidly, burning, constitute the reductive agent as coke part surrogate, fuel.
On the other hand, the ash content in the carbide (combustion does not divide), near fusion high-temperature portion is coke turning motion district and coke turning motion district forms slag and enters into blast furnace slag.The result suppressed the slag that causes by the ash content in the carbide by the coke turning motion district 9 in the blast furnace by the fusion on the top band that drips, and drip in the cupola well accumulation slagging in cupola well by the height in coke turning motion district.
Like this, according to the present invention, can be under the situation that does not hinder ventilation property in the State of Blast Furnace, the ash content in the solid fuel of refuse carbide is made slagging and enter in the blast furnace slag.
That is to say that the present invention when a part of surrogate of the coke that volume is used in as the shaft furnace of the manufacturing pig iron such as blast furnace effectively utilizes, makes the ash content in this carbide enter into blast furnace slag the carbide of solid fuel of refuse.Ash content in this carbide, the aggregate that can use as blast furnace cement material, concrete with the form of blast furnace slag etc. effectively utilizes.In a word, according to the present invention, can under the situation of the problem that does not produce the combustion ash processing, effectively utilize industrial waste and general waste rubbish.
And, in the present invention, preferably the carbide and the coal dust of solid fuel of refuse are jetted in coke turning motion district by blast-furnace tuyere simultaneously.
The part sectional drawing of Fig. 2 by side elevational view and blast-furnace body shown another example of blast-furnace equipment and carbide powder of the present invention, breeze blowing equipment.
Among Fig. 2,12d represents open and close valve, and 20B represents the carbide powder, and coal dust hopper, 23B are represented the carbide powder, breeze blowing pipe arrangement, 40 expression coal handling equipments, 41 expression coal hopper.Arrow f 3BThe throughput direction of expression carbide powder, coal dust.The content that other symbolic representation and Fig. 1 are same.
That is to say that the formation of the blast furnace of example shown in Figure 2 is in order to cut down the lump coke usage quantity and breeze blowing equipment that is provided with and the shared basic equipment of carbide powder blowing device of jetting simultaneously with breeze blowing equipment in the blast furnace operating.
At the carbide powder of example shown in Figure 2, in the breeze blowing equipment, be that the coal handling equipment stores the coal in coal hopper 41 and stores carbide in charing material 11 by endless belt conveyor, respectively repeatedly in accordance with regulations amount be fed to screw feeder 14.Coal of being supplied with and carbide are broken into by pulverizer 15 micro mists and are preferably below the 150 μ m, are transported to blowpipe 7 by above-mentioned air mode of movement, again by tuyere injection in blast-furnace coke turning motion district.
According to above-mentioned with carbide powder, coal dust the two fuel blowing method in blast-furnace coke turning motion district of jetting to blast furnace, obtain following excellent results.
(1), make the generation of the dioxin that inhibition rubbish causes become possibility because use the carbide of solid fuel of refuse.
(2) can effectively utilize reductive agent, the fuel of rubbish as blast furnace.
(3) ash content in the carbide of solid fuel of refuse is entered in the blast furnace slag, make it possible to the form with blast furnace slag, as the blast furnace cement material, the aggregate that concrete is used etc. effectively utilize.
(4) can be shared in blast furnace operating, cutting down the breeze blowing equipment that the lump coke usage quantity is provided with and the basic equipment of carbide powder blowing device, therefore can enough easy equipment cut down the lump coke usage quantity in the blast furnace operating significantly.
Secondly, Fig. 3 shows the example of carbide manufacturing process of solid fuel of refuse of the present invention and the using method of this carbide with schema.
With the urban waste, household garbage, industrial waste, general waste, and crusher scrap (trolley part, family's electrical article, the fragmentation product of household electrical appliances article component) etc. rubbish passes through broken bag, foreign matter separates, glass, ceramic ware class, metal species are removed in magnetic separation, obtain with the rubbish of combustiblematerials as main body.Carry out fragmentation or pulverizing, in aftermentioned solid fuel of refuse charing operation, carry out drying as thermal source again with the rubbish of combustiblematerials resulting as main body with steam from boiler.Dried rubbish forms after fragmentation once again or pulverizing, and for example manufacturing, profile is bar-shaped solid fuel of refuse (RDF, WDF).In addition, before shaping, add the lime that uses as dechlorinating agent, water-removal agent, solidifying agent, slaked lime etc. by necessity.
The solid fuel of refuse that manufactures sieves by necessity, is transported to the charing operation then.In the charing operation, make the solid fuel of refuse destructive distillation by carbonizing apparatus, create the carbide of solid fuel of refuse.The carbonizing gas that produces in carbonizing apparatus at high-temp combustion more than 1000 ℃, decomposes Dioxins through carbonizing gas high-temp combustion device fully, and the form with steam is carried out recovery of heat in boiler then.The part of resulting steam is utilized as the thermal source in the aforementioned drying garbage operation.
The carbide of solid fuel of refuse is transported to the shaft furnace that blast furnace in the iron work etc. is made the pig iron, jets in the coke turning motion district that forms before the shaft furnace air port by blast-furnace tuyere etc.That is to say, in shaft furnace, be used as a part of surrogate of the coke of reductive agent, fuel use.
Ash content in the carbide of the solid fuel of refuse in the supply coke turning motion district generally is SiO 2, Al 2O 3Reaching CaO is principal constituent, therefore transfers in the blast furnace slag, reclaims as slag.In a word, making can be with the form of the ash content in the carbide of solid fuel of refuse with blast furnace slag, as blast furnace cement material, concrete with aggregate, roadbed material, foundation improvement material, face civil construction material such as building materials, silicic acid matter fertilizer, the good improvement of soil material etc. effectively utilizes.
As mentioned above, in the present invention, as the carbide of solid fuel of refuse, be preferably use with refuse breaking or pulverizing, drying after, reshape and the carbide of the solid fuel of refuse that obtains.But, set out by the effect of will putting of the present invention, as shown in Figure 4, use after refuse breaking or pulverizing, the shaping, dry again and the carbide solid fuel of refuse that obtains is also good.Perhaps also the two can be mixed the back uses.
In addition, the drying after being shaped in the manufacturing process of the carbide of solid fuel of refuse also can be carried out in the heating phase of charing operation.
In addition, in the present invention preferably, in the preceding step operation that solid fuel of refuse is shaped, interpolation is by Wingdale, unslaked lime, slaked lime, rhombspar, select in the middle of magnesium oxide and the magnesium hydroxide etc. more than a kind or 2 kinds so that to the basicity of the ash content (combustion divides) of the carbide of solid fuel of refuse (with CaO/SiO 2Or " CaO+MgO)/(SiO 2+ Al 2O 3) " expression) adjust.Because adjust by basicity to the carbide of solid fuel of refuse, the viscosity of the slag that the ash content by this carbide produces is reduced, become easier thereby use blast furnace operating such as slag operation.
More than the present invention is narrated, but the present invention is not limited to blast furnace, all can be suitable for for the shaft furnace of the manufacturing pig iron such as cupola furnace of making foundry iron.
Embodiment
Below, on the basis of embodiment, be described more specifically the present invention.
In technology shown in Figure 3, make the carbide of solid fuel of refuse.Composition analysis value of the carbide of the solid fuel of refuse of manufacturing etc. is shown in table 1.In blast-furnace equipment shown in Figure 1, use reductive agent, the fuel of the carbide of solid fuel of refuse as a part of coke surrogate, carry out service test.
In addition, table 2 shows the size-grade distribution of above-mentioned carbide.When in blast furnace, using, use the pulverizer 15 among Fig. 1 to be ground into below the particle diameter 150 μ m, jet again in blast-furnace coke turning motion district 9.
Table 3 shows solid fuel of refuse carbide winding-up amount, coke ratio, the fuel ratio in this test.Fuel ratio shown in the table 3 is the total amount of the carbide of the coke that consumes of per 1 ton of pig iron, solid fuel of refuse.
As shown in table 3, the carbide of solid fuel of refuse is jetted in blast-furnace coke turning motion district, as the reductive agent use of agglomerate, iron ore, the result can make the fuel cost of blast furnace reduce.
And, when carrying out this test, do not find the interior hanging of blast furnace, sit material etc., the operation direct motion, the slag because of the generation of the ash content in the carbide of solid fuel of refuse does not impact.Table 2
????+3mm ????3～2mm ???2～1mm ???1～0.5mm ???-0.5mm
????5 ????14 ???28 ???24 ?????29
Appendix) the numeric representation wt% table 3 in the table
The carbide winding-up amount (the kg/t-pig iron) of solid fuel of refuse ??5
Coke ratio (the kg/t-pig iron) ??533
Fuel ratio (the kg/t-pig iron) ??538
According to the present invention, can provide a kind of low-cost working method of shaft furnace that can under the situation that does not produce the handling problem of dioxin and combustion ash, effectively utilize rubbish.
In a word, according to the present invention, can not produce under the situation that combustion ash handles problems, effectively utilizing the fragmentation product of the parts etc. of urban waste, household garbage, industrial waste, general waste and trolley part, tame electrical article, tame electrical article is rubbish such as crusher scrap.
And, according to the present invention, the carbide of the carbide storage that solid fuel of refuse only is set with hopper, pulverizer, after will the pulverizing pipe arrangement in coke turning motion district of jetting, just can in the blast furnace of iron work etc. is made the shaft furnace of the pig iron, use this carbide, therefore can effectively utilize the carbide of solid fuel of refuse with extremely easy device.

Claims (7)

1, the working method of shaft furnace is characterized in that, the carbide of solid fuel of refuse is acted as a fuel, and the winding-up system is made in the coke turning motion district of shaft furnace of the pig iron.
2, the working method of the described shaft furnace of claim 1, it is characterized in that, the carbide of this solid fuel of refuse is with after refuse breaking or pulverizing, the drying, reshape the carbide of the solid fuel of refuse that obtains and/or with after refuse breaking or pulverizing, the shaping, again the carbide of the dry solid fuel of refuse that obtains.
3, the working method of the described shaft furnace of claim 1 is characterized in that, the carbide of this solid fuel of refuse is pulverized the back winding-up.
4, the working method of the described shaft furnace of claim 1 is characterized in that, the particle diameter of the carbide of this solid fuel of refuse is below the 150 μ m.
5, the working method of the described shaft furnace of claim 1 is characterized in that, the carbide of this solid fuel of refuse adds coal and makes as part of raw materials.
6, the working method of the described shaft furnace of claim 1 is characterized in that, this shaft furnace is a blast furnace, and the carbide of this solid fuel of refuse is jetted by blast-furnace tuyere.
7, the working method of the described shaft furnace of claim 6 is characterized in that, the winding-up and the coal dust of the carbide of this solid fuel of refuse carried out simultaneously.
CN99122129A 1998-09-30 1999-09-30 Method for operating vertical blast furnace for making pig-iron Pending CN1250812A (en)

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JP279193/98 1998-09-30
JP27919398A JP2000109911A (en) 1998-09-30 1998-09-30 Method for blowing fuel in shaft furnace

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Publication number Priority date Publication date Assignee Title
CN1300027C (en) * 2003-01-20 2007-02-14 梅尔兹-奥芬布股份公司 Process for firing a mineral material mixture

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JP2003313608A (en) * 2003-03-07 2003-11-06 Jfe Steel Kk Process for treating scrap wood
KR101388317B1 (en) * 2012-07-30 2014-04-22 현대제철 주식회사 Testing apparatus for blast furnace
KR101388264B1 (en) * 2012-07-30 2014-04-22 현대제철 주식회사 Testing apparatus for blast furnace
KR101417517B1 (en) * 2012-12-26 2014-07-08 주식회사지이티 Blast furnace simulation apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300027C (en) * 2003-01-20 2007-02-14 梅尔兹-奥芬布股份公司 Process for firing a mineral material mixture

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