CN110325654A - The manufacturing method of sinter - Google Patents
The manufacturing method of sinter Download PDFInfo
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- CN110325654A CN110325654A CN201880011926.7A CN201880011926A CN110325654A CN 110325654 A CN110325654 A CN 110325654A CN 201880011926 A CN201880011926 A CN 201880011926A CN 110325654 A CN110325654 A CN 110325654A
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- sintering
- raw materials
- sinter
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of manufacturing method of sinter, even if the constituent concentration for generating dust in iron ore and steel mill changes, is able to use the raw materials for sintering comprising them also to manufacture quality and reduce the finished product sinter being inhibited.The manufacturing method of the sinter is granulated the raw materials for sintering for being at least combined with iron-bearing material, raw material containing CaO and coagulated material, it is sintered in sintering machine to manufacture sinter, the mensuration operation of METHOD FOR CONTINUOUS DETERMINATION is carried out with the constituent concentration at least one of iron-bearing material, raw materials for sintering and the raw materials for sintering that has been granulated, using the constituent concentration measured in mensuration operation, at least one of the travel speed of pallet trolley of the use level of the raw material containing CaO, the use level of coagulated material, the additive amount of water and sintering machine is adjusted.
Description
Technical field
The present invention relates to a kind of manufacturing method of the sinter of the use level of the raw material containing CaO etc. in adjustment raw materials for sintering,
METHOD FOR CONTINUOUS DETERMINATION is carried out in particular to the constituent concentration of a kind of pair of raw materials for sintering and is adjusted using the constituent concentration containing CaO
The manufacturing method of the sinter of the use level of raw material etc..
Background technique
It is primarily now former as blast furnace used as the sinter of source of iron, iron ore, pellet etc. in blast-furnace iron-making method
Material.Here, sinter is one kind of nodulizing, be in drum mixer while adding water by partial size be 10mm iron below
The miscellaneous sources of iron such as the various dust generated in ore and steel mill；The raw materials containing CaO such as lime stone, quick lime, clinker；By silica or
The SiO of the compositions such as serpentinite, dolomite or Refining Nickel clinker2Source or auxiliary material as the source MgO；By powdered coke or smokelessly
Coagulated material, that is, solid fuel (carbon materials) of the compositions such as coal is mixed, is granulated, and made of calcining.
In recent years, the iron concentration of the iron ore contained in the raw materials for sintering as the raw material of sinter reduces, and SiO2、
Al2O3Etc gangue content concentration increase, even if there is also ingredient when import on every ship is dense in iron ore of the same race
Different situations is spent, the constituent concentration of the iron ore of institute's output also becomes unstable therewith.It is various about what is generated in steel mill
Dust, the deviation of yield, the variation of dust self component are also big, and the composition management as raw materials for sintering is very difficult.
The variation of constituent concentration in raw materials for sintering will lead to the variation of the constituent concentration of the finished product sinter as finished product.
For example, SiO2Increase usually become reduce sinter being reduced property an important factor for, Al2O3Increase usually become reduction
An important factor for intensity of sinter.Therefore, when the ingredient of raw materials for sintering deviates planned value, need to carry out operation adjustment, cooperation
Adjustment is to avoid quality reduction.
Usually for reasons such as the management of the grade of clinker, the constituent concentration for being encased in sinter in blast furnace is carried out always
Management.Assuming that blast-furnace slag glues in the case that basicity rising or aluminium oxide rise in the constituent concentration of finished product sinter
Degree rises, it is therefore desirable to increase molten iron temperature to inhibit its viscosity to rise.Since the viscosity of blast-furnace slag rises and make blast furnace
The clinker discharge property of furnace lower part is deteriorated, and hinders the circulation of gas, therefore gas permeability is also deteriorated.Therefore, in order to ensure molten iron temperature
Rising and State of Blast Furnace lower part gas permeability, it is necessary to increase the use level of coke.In this way, because of the constituent concentration of finished product sinter
Variation and the constituent concentration of blast furnace raw material when greatly deviating from target component concentration, blast furnace operating becomes unstable, thus needs
Various countermeasures.
For such problems, the research for the grade for holding raw materials for sintering has been carried out in the past.For example, public in patent document 1
It has opened following technology: being conceived to the clay mineral contained in iron ore, by viscous in the micro mist ore that will contain in iron ore
Native mineral (kaolin: Al2Si2O5(OH)4) content be adjusted to range appropriate to improve the granulation of raw materials for sintering.
Following technology is disclosed in patent document 2: the FeO concentration of finished product sinter being measured, is sintered using finished product
The FeO concentration of mine is adjusted coagulated material or granulation water, the exhaust air rate of raw materials for sintering.Be also disclosed in patent document 3 as
Lower technology: being measured the FeO concentration of the finished product sinter of finished product sinter, and the FeO concentration using finished product sinter is to blowing
The amount for entering the gas into sintering machine is adjusted.
Following technology is disclosed in patent document 4: on sintering machine be arranged laser type constituent measuring instrument, using use this at
The constituent concentration for dividing the raw material of measuring instrument measurement being encased in pallet to be packed into the constituent concentration supposition finished product sinter on layer surface layer,
The use level of raw materials for sintering is adjusted using the concentration.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2003-049227 bulletin
Patent document 2: Japanese Unexamined Patent Application 57-149433 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2011-038735 bulletin
Patent document 4: Japanese Unexamined Patent Application 60-262926 bulletin
Summary of the invention
Technology disclosed in Patent Document 1 is to weigh a certain amount of iron ore sample, measures kaolin off-line manner
Constituent concentration.The ingredient of offline raw materials for sintering is measured in this way, can predict the constituent concentration of sinter, but is difficult to answer
Surplus or deficiency to the heat generated due to the variation of the constituent concentration of the raw materials for sintering during sinter manufactures.
Patent document 2 and technology disclosed in Patent Document 3 are to carry out METHOD FOR CONTINUOUS DETERMINATION to the FeO concentration of finished product sinter
Technology, but in the adjustment of the use level for making the composition analysis result of finished product sinter be reflected in raw materials for sintering for, time lag
Greatly, it is difficult to the variation of the constituent concentration of the raw materials for sintering in the manufacture of reply sinter rapidly.
Technology disclosed in Patent Document 4 according to raw material be packed into layer surface layer constituent concentration come speculate finished product sinter at
Divide concentration, but the state of raw material loading layer is changed according to the charging apparatus of raw materials for sintering, the moisture of raw materials for sintering, therefore raw material
The constituent concentration for being packed into the surface layer of layer also changes.Therefore, the constituent concentration on layer surface layer and the constituent concentration of finished product sinter are packed into
Relationship and different, it is difficult to the constituent concentration of finished product sinter is actually speculated according to the constituent concentration for being packed into layer surface layer.
The present invention is carried out in view of such problem of the prior art point, even if its purpose is to provide one kind iron ores
The constituent concentration that dust is generated in stone and steel mill changes, and is able to use the raw materials for sintering containing them also to manufacture ingredient
The manufacturing method of the sinter of the small finished product sinter of concentration change.
The feature of the invention for solving such project is as follows.
(1) a kind of manufacturing method of sinter, to the burning for being at least combined with iron-bearing material, raw material containing CaO and coagulated material
Knot raw material is granulated, and is sintered in sintering machine to manufacture sinter, the manufacturing method has following process:
Mensuration operation, at least one of above-mentioned iron-bearing material, above-mentioned raw materials for sintering and the raw materials for sintering that has been granulated
Constituent concentration carries out METHOD FOR CONTINUOUS DETERMINATION,
Adjust process, using the constituent concentration measured in said determination process, to the use level of the above-mentioned raw material containing CaO, on
At least one of the travel speed for stating the pallet trolley of the use level of coagulated material, the additive amount of water and sintering machine is adjusted
It is whole.
(2) manufacturing method of the sinter according to (1), wherein further cooperation contains MgO in above-mentioned raw materials for sintering
Raw material, in above-mentioned adjustment process, using the constituent concentration measured in said determination process to the use level of the above-mentioned raw material containing CaO,
The use level of the above-mentioned raw material containing MgO, the use level of above-mentioned coagulated material, the additive amount of above-mentioned water and sintering machine pallet trolley
At least one of travel speed is adjusted.
(3) a kind of manufacturing method of sinter, to the burning for being at least combined with iron-bearing material, raw material containing CaO and coagulated material
Knot raw material is granulated, and is directed at above-mentioned raw materials for sintering while gaseous fuelled and oxygen in sintering machine and is sintered to manufacture
Sinter, the manufacturing method have following process:
Mensuration operation, at least one of above-mentioned iron-bearing material, above-mentioned raw materials for sintering and the raw materials for sintering that has been granulated
Constituent concentration carries out METHOD FOR CONTINUOUS DETERMINATION,
Adjust process, using the constituent concentration measured in said determination process, to the use level of the above-mentioned raw material containing CaO, on
State the use level of coagulated material, the additive amount of water, the travel speed of pallet trolley of sintering machine, the supply amount of gaseous fuel and oxygen
At least one of supply amount be adjusted.
(4) manufacturing method of the sinter according to (3), wherein further cooperation contains MgO in above-mentioned raw materials for sintering
Raw material, in above-mentioned adjustment process, using the constituent concentration measured in said determination process, to the use level of the above-mentioned raw material containing CaO,
The use level of the above-mentioned raw material containing MgO, the use level of above-mentioned coagulated material, the additive amount of above-mentioned water, sintering machine pallet trolley
At least one of travel speed, the supply amount of gaseous fuel and supply amount of oxygen are adjusted.
(5) manufacturing method of the sinter according to any one of (1)~(4), wherein right in said determination process
Total CaO, SiO2、MgO、Al2O3, one or more of FeO, C and moisture constituent concentration be measured.
By implementing the manufacturing method of sinter of the invention, it is able to use the big iron ore of the variation containing constituent concentration
The small and quality that changes that constituent concentration is manufactured with the raw materials for sintering of dust is generated in steel mill reduces the finished product being inhibited burning
Tie mine.
Detailed description of the invention
Fig. 1 is an example of the sinter manufacturing device 10 for the manufacturing method of sinter for indicating implementable present embodiment
The schematic diagram of son.
Fig. 2 is the figure of the variation of the basicity for indicating the raw materials for sintering of example 1 and the drop strength of finished product sinter 72.
Fig. 3 is the figure of the basicity for indicating the raw materials for sintering of comparative example 1 and the drop strength of finished product sinter 72.
Fig. 4 is the travel speed for indicating the productivity of the sintering machine of example 2, the concentration of carbon of raw materials for sintering and pallet trolley
Variation figure.
Fig. 5 is the travel speed for indicating the productivity of the sintering machine of comparative example 2, the concentration of carbon of raw materials for sintering and pallet trolley
Variation figure.
Specific embodiment
Hereinafter, by invention embodiment the present invention will be described.Fig. 1 is the burning for indicating implementable present embodiment
Tie the schematic diagram of an example of the sinter manufacturing device 10 of the manufacturing method of mine.The iron-bearing material 12 being stored in stockyard 11
It is handled upside down conveyer 14 and is transported to mixing channel 22.Iron-bearing material 12 generates powder in iron ore and steel mill containing various kinds
Dirt.
Raw material supply unit 20 has multiple mixing channels 22,24,25,26,28.Iron-bearing material 12 has been stockpiled in mixing channel 22.
The raw material containing CaO containing lime stone, quick lime etc. 16 is stockpiled in mixing channel 24, stockpiled in mixing channel 25 comprising dolomite,
The raw material containing MgO 17 of Refining Nickel clinker etc..It has been stockpiled in mixing channel 26 containing being ground into partial size 1mm powder below using rod mill
Shape coke, anthracitic coagulated material 18.The partial size 5mm stockpiled under the sieve for reaching sinter in mixing channel 28 below returns mine
(sinter minus sieve).Each raw material that specified amount is cut out from the mixing channel 22~28 of raw material supply unit 20, they are cooperated
For raw materials for sintering.Raw materials for sintering is handled upside down conveyer 30 and is transported to drum mixer 36.Raw material containing MgO 17 is that any cooperation is former
Material, can cooperate in raw materials for sintering, can also mismatch.
Infrared analyzer 32 is provided on carrying conveyer 30 between mixing channel 28 and drum mixer 36.Using red
Outside line analyzer 32 implements mensuration operation.In mensuration operation, to total CaO, SiO contained by raw materials for sintering2、MgO、Al2O3、
The constituent concentration of one or more of FeO, C and moisture is measured.Here, moisture, which refers to, will be attached to the attachment of raw materials for sintering
It is contained under moisture and temperature constant state in raw material and by heating obtained by discharged inherent moisture merging.
Infrared analyzer 32 0.5~50.0 μm is irradiated to raw materials for sintering in the range of wavelength infrared ray, and receive
Reflected light from raw materials for sintering.Total CaO, SiO contained by raw materials for sintering2、MgO、Al2O3, FeO, water respective molecule vibration
The dynamic intrinsic wavelength components for absorbing illuminated infrared ray, thus these ingredients to reflection infrared ray assign intrinsic wavelength at
Point.The crystal structure of monoatomic molecules as carbon (C) also starts to vibrate because of the irradiation of infrared ray, assigns to reflection infrared ray
Intrinsic wavelength components.Therefore, it by analyzing irradiation infrared ray and reflection infrared ray, can measure in raw materials for sintering
Total CaO, SiO2、MgO、Al2O3, FeO, C and moisture constituent concentration.Total CaO refers to CaO, CaCO3、Ca(OH)2Or
Fe2CaO4It is converted into obtained by CaO Deng the Ca in all compounds with Ca and O.
Infrared analyzer 32 irradiates the infrared ray of 20 or more wavelength for example with 1 minute 128 times frequencies, and reception is burnt
Tie the reflected light of raw material reflection.In this way can be with short irradiation infrared ray, therefore infrared analyzer 32 can be with online
Mode carries out METHOD FOR CONTINUOUS DETERMINATION to the constituent concentration for the raw materials for sintering carried on carrying conveyer 30.Infrared analyzer 32
It is an example of the analytical equipment being measured to the constituent concentration of raw materials for sintering, also can be used and measure object irradiation is swashed
The laser analyzer of light irradiates the neutron analyzer of neutron to measure object or to the microwave analysis instrument of measure object irradiating microwaves
To replace infrared analyzer 32.
The raw materials for sintering for being transported to drum mixer 36 is put in drum mixer 36, adds suitable water 34, example
Such as it is granulated into the pseudo- particle of 3.0~6.0mm of average grain diameter.The raw materials for sintering being granulated is handled upside down conveyer 38 and is transported to sintering machine
40 raw materials for sintering feedway.Drum mixer 36 is an example of the prilling granulator being granulated to raw materials for sintering, drum
Pelletizer pelletizer can also can be used to replace drum mixer 36 to be multiple in formula mixing machine 36.Also it can be used
High-speed mixer can be arranged in the upstream of drum mixer 36 in both drum mixer 36 and Pelletizer pelletizer
Stir raw materials for sintering.In present embodiment, average grain diameter is arithmetic mean diameter, is that (wherein, Vi is the by Σ (Vi × di)
Particle in i particle size range there are ratio, di is the representative diameter of i-th of particle size range.) partial size that defines.
Implement adjustment process, that is, using the constituent concentration of the raw materials for sintering measured in mensuration operation, to raw material containing CaO 16
At least one of use level, the use level of coagulated material 18 and the additive amount of water 34 that is added in drum mixer 36 into
Row adjustment is to reach preset target value.Preset target value for example can be the basicity (CaO/ of raw materials for sintering
SiO2), the concentration of carbon of raw materials for sintering, MgO concentration, moisture concentration, Al2O3Heat when concentration or sintering, these target values can
It is preset using manufacture actual value of past sinter etc..It, can be in adjustment work in the case where cooperating raw material containing MgO 17
The use level of raw material containing MgO 17 is adjusted in sequence using the constituent concentration of the raw materials for sintering measured in mensuration operation.
In present embodiment, using infrared analyzer 32 carry out constituent concentration measurement frequency be 1 minute 128 times, 1
Minute calculates the average value of primary 128 constituent concentrations, and using the average value of the constituent concentration of calculating, every 1 minute to height
The use level of furnace raw material implements adjustment process.
By the adjustment process, even if the constituent concentration of the gangue content of iron ore changes, by using in mensuration operation
The constituent concentration of the raw materials for sintering of measurement, such as feedback control is carried out to the use level of raw material containing CaO 16 so that raw materials for sintering
Basicity (CaO/SiO2) reach preset target value, also make the basicity (CaO/SiO of raw materials for sintering2) variation become smaller.
Even if the concentration of carbon for generating dust in steel mill changes, by using the carbon of the raw materials for sintering measured in mensuration operation
Concentration carries out feedback control so that the concentration of carbon of raw materials for sintering reaches preset target to the use level of coagulated material 18
It is worth, the variation of the concentration of carbon in raw materials for sintering also becomes smaller.
Even if the moisture concentration for generating dust in iron ore and steel mill changes, following feedforward control: root can also be carried out
The moisture concentration of the raw materials for sintering measured in process according to surveying and determination and preset Target moisture concentration determine to mix in drum-type
The additive amount of the water 34 added in machine 36.Then, by adding in drum mixer 36 by control water adjusted
The moisture concentration of raw materials for sintering can be adjusted to Target moisture concentration by water 34.
Sintering machine 40 is, for example, moral White-Selwyn Lloyd sintering machine of lower section aspiration-type.Sintering machine 40 is supplied with raw materials for sintering
To device 42, the pallet trolley 44 of annular mobile, ignition furnace 46, gas-fuel feeder 47 and bellows 48.Raw materials for sintering
It is loaded into pallet trolley 44 from raw materials for sintering feedway 42, forms the loading layer of raw materials for sintering.Layer is packed by ignition furnace 46
Igniting.Loading layer is by attracting air via bellows 48, the gas that will be supplied by the gas-fuel feeder 47 for being set to top
Fluid fuel and oxygen are introduced into loading layer, and gaseous fuel and coagulated material 18 is made to burn in loading layer on one side, make to be packed into layer on one side
Lower section movement of the interior burning, fusion zone to loading layer.Layer is packed into as a result, to be sintered and form sinter cake.Present embodiment
In, gaseous fuel be selected from installation for blast furnace gas, coke-fired furnace gas, blast-furnace coke furnace mixed gas, converter gas, gas,
Any imflammable gas in natural gas, methane gas, ethane gas, propane flammable gas, shale gas and their mixed gas.
The constituent concentration of the raw materials for sintering measured in mensuration operation can be used to the pallet trolley 44 in sintering machine 40
At least one of the supply amount of oxygen in the supply amount and sintering machine of gaseous fuel in travel speed, sintering machine is adjusted
It is whole.
Sinter cake is crushed by pulverizer 50 and forms sinter.Sinter obtained by being crushed as pulverizer 50 is by cooling down
Machine 60 is cooled down.It is sieved, is sieved as grain by the screening plant 70 with multiple sieves through the cooling sinter of cooler 60
Diameter is more than the finished product sinter 72 of 5mm and partial size 5mm is below returns mine 74.Finished product sinter 72 is transported to by carrying conveyer 76
Blast furnace 80, is loaded into blast furnace as blast furnace raw material.On the other hand, return mine 74 by carrying conveyer 78 be transported to raw material supply
The mixing channel 28 in portion 20.Obtained by finished product sinter 72 is the sinter cooling that will be crushed through pulverizer 50, sieves, therefore finished product
Sinter 72 and the sinter crushed through pulverizer 50 are the sinter of identical component concentration.In present embodiment, finished product sintering
The partial size of mine 72 and 74 partial size of returning mine refer to the partial size sieved by sieve, for example, partial size is more than that 5mm refers to using mesh
The sieve of 5mm is sized the partial size on sieve, and partial size 5mm or less refers to the partial size being sized under sieve using the sieve of mesh 5mm.At
Product sinter 72 and return mine 74 partial size each value only example, be not limited to the value.
In this way, implementing following adjustment process in the manufacturing method of the sinter of present embodiment: using in mensuration operation
The constituent concentration measured by infrared analyzer 32, use level, the use level and drum of coagulated material 18 to raw material containing CaO 16
At least one of the additive amount of the water 34 added in formula mixing machine 36 is adjusted to reach preset target value.By
This, the variation of the constituent concentration of raw materials for sintering becomes smaller, the constituent concentration of the finished product sinter 72 manufactured using the raw materials for sintering
Variation also becomes smaller, and as a result, it is possible to inhibit the reduction of the quality of finished product sinter 72.
For example, it is also possible to use the CaO and SiO measured in mensuration operation in adjustment process2Concentration to former containing CaO
The use level of material 16 is adjusted the basicity (CaO/SiO so that raw materials for sintering2) reach preset target value.It is as a result,
Just the iron ore big using the variation of the constituent concentration of gangue content, the basicity (CaO/SiO of raw materials for sintering2) variation also become
Small, the variation of the basicity of the finished product sinter 72 manufactured using the raw materials for sintering is also become smaller, and can manufacture the finished product of intensity stabilization
Sinter 72.Blast furnace raw material is used as by using the equable finished product sinter 72 of basicity, additionally it is possible to facilitate the steady of blast furnace
Fixed operation.
If the variation of the concentration of carbon of raw materials for sintering is big, the variation of heat when being sintered becomes larger, as a result, finished product sinter
The variation of 72 FeO concentration also becomes larger.It, can also be in adjustment process to solidifying in the case that the variation of FeO concentration in this way becomes larger
Tie at least one of the use level of material 18, supply amount of oxygen in the supply amount and sintering machine of gaseous fuel on sintering machine
It is adjusted so that heat when being sintered reaches preset target value.The variation of heat when being sintered as a result, becomes smaller, finished product
The variation of the FeO concentration of sinter 72 also becomes smaller.
The manufacturing method of the sinter of present embodiment can be used come to the water 34 added in drum mixer 36
Additive amount is adjusted.By adjusting the additive amount of water 34 to reach the target value of preset moisture concentration, to be sintered
The variation of the moisture concentration of raw material becomes smaller, and the variation of heat when sintering also further becomes smaller.Finished product sinter 72 as a result,
The variation of FeO concentration further becomes smaller.
The FeO concentration change of finished product sinter 72, the being reduced property of blast furnace raw material is deteriorated when FeO concentration is got higher.If high
The being reduced property of furnace raw material is deteriorated, then reduces as the indirect reduction of exothermic reaction, and the direct-reduction as the endothermic reaction increases,
Become shortage of heat in blast furnace.In order to eliminate the shortage of heat, reducing material is further encased in blast furnace, in blast furnace operating
Coke ratio increase.Therefore, by controlling the FeO concentration of finished product sinter 72 for target component concentration, it is able to suppress blast furnace behaviour
The increase of the coke ratio of work.
Heat when sintering, which becomes when the more and temperature of sinter cake is got higher, to apply overload to cooler 60.Therefore, it is surveying
Determine in the case where confirmed that the concentration of carbon of raw materials for sintering rises in process, it can be when the raw materials for sintering be sintered in sintering machine 40
Reduce the travel speed of the pallet trolley 44 of sintering machine.Thereby, it is possible to reduce the load of cooler 60.The measurement of present embodiment
In process, METHOD FOR CONTINUOUS DETERMINATION is carried out to the constituent concentration of raw materials for sintering on-line manner, therefore can also hold paroxysmal carbon
The rising of concentration.By reducing the travel speed of the pallet trolley 44 of sintering machine according to the rising of the concentration of carbon, can prevent
The damage of equipment caused by rising because of the temperature of sinter cake.
When cooperating the raw material 17 containing MgO in raw materials for sintering, being surveyed in mensuration operation by infrared analyzer 32 can be used
Fixed MgO concentration adjusts the use level of raw material containing MgO 17 to reach the target value of preset MgO concentration.Finished product as a result,
The variation of the constituent concentration of the MgO of sinter 72 also becomes smaller.MgO ingredient in finished product sinter 72, which has, to be improved fusing point and improves
Soften the effect of meltbility.Therefore, softening meltbility is obtained by reducing the variation of the MgO constituent concentration of finished product sinter 72
Improvement, can aid in the stable operation of blast furnace.
It is shown in the present embodiment using the sintering machine 40 with gas-fuel feeder 47 and manufactures sinter
Example, but be not limited to the sintering machine 40 with gas-fuel feeder 47, can also not have gas using having and fire
Expect the sinter manufacturing device of the sintering machine of feedway 47.Use the feelings of the sintering machine without gas-fuel feeder 47
Use level, the use level of coagulated material 18, water under condition, using the constituent concentration measured in mensuration operation to raw material containing CaO 16
At least one of the travel speed of the pallet trolley 44 of 34 additive amount and sintering machine is adjusted.That is, in present embodiment
In, as long as the supply of gaseous fuel and oxygen in sintering machine 40 carries out as needed, adjust the gaseous fuel in process
As long as supply amount and/or oxygen supply amount adjustment also as needed carry out.
It is shown in present embodiment and infrared analyzer 32 is set between mixing channel 28 and drum mixer 36
It carries on conveyer 30 and measures the example of the constituent concentration of raw materials for sintering, but not limited to this.It can also be by infrared ray point
Analyzer 32, which is set to, carries on conveyer 14 to total CaO, the SiO being transported to contained by the iron-bearing material 12 of mixing channel 222、MgO、
Al2O3, one or more of FeO, C and moisture constituent concentration be measured, infrared analyzer 32 can also be set to mixed
It closes on the carrying conveyer 30 between slot 22 and mixing channel 24 to total contained by the iron-bearing material 12 exported from mixing channel 22
CaO、SiO2、MgO、Al2O3, one or more of FeO, C and moisture constituent concentration be measured.For the ingredient of raw materials for sintering
For an important factor for concentration change, by the iron ore and the refining that are stored in the various kinds contained in the iron-bearing material 12 in stockyard 11
It is affected brought by the variation for generating the constituent concentration of dust in steel mill.Therefore, it can be realized following feedforward control:
It carries and infrared analyzer 32 is set on conveyer 14 to measure the constituent concentration of iron-bearing material 12, use the measured value and target
The constituent concentration of raw materials for sintering determines the use level of raw material containing CaO 16, the additive amount of the use level of coagulated material 18 and water 34
At least one of, thereby, it is possible to reduce the concentration change of each ingredient of raw materials for sintering.By being arranged on carrying conveyer 14
Infrared analyzer 32 measures the constituent concentration of iron-bearing material 12, and adjusts the pallet trolley of sintering machine using the measured value
44 travel speed, the supply amount of the gaseous fuel on sintering machine and/or oxygen, additionally it is possible to which heat when inhibiting by being sintered changes institute
The adverse effect of cause.
Infrared analyzer 32 can also be set to and to be carried on conveyer 38, to being transported to being granulated for sintering machine 40
Total CaO, SiO contained by raw materials for sintering2、MgO、Al2O3, one or more of FeO, C and moisture constituent concentration be measured.
The raw materials for sintering being granulated uniformly is mixed by drum mixer 36, and each raw material will not be segregated, therefore can be accurately
Measure the constituent concentration of raw materials for sintering.Then, using the constituent concentration to the use level of raw material containing CaO 16, coagulated material 18
At least one of additive amount of use level and water 34 carries out feedback control, thus it enables that the concentration of each ingredient of raw materials for sintering
Variation becomes smaller.In turn, the measured value can be used also to adjust travel speed, the gaseous fuel of the pallet trolley 44 of sintering machine
And/or the supply amount of oxygen, the adverse effect caused by the variation of heat when being sintered can also be inhibited as a result,.
It is shown in present embodiment and each raw material is cut out by the mixing channel 22~28 of raw material supply unit 20, is carrying conveyer
Raw materials for sintering is made on 30 and the example of the raw materials for sintering as obtained by the granulation of drum mixer 36 is made, but it is not limited to this.Example
Such as, by the way that iron-bearing material 12, raw material containing CaO 16 will be combined with and 74 raw materials for sintering of returning mine is put into drum mixer 36,
It adds water in raw materials for sintering to be granulated, when being granulated, the second half section puts into coagulated material 18, and surface layer can be existed to condensation material
The carbon material external particle of material 18 is used as the raw materials for sintering being granulated.In this case, using infrared analyzer 32
The constituent concentration of at least one of iron-bearing material 12 and above-mentioned raw materials for sintering is measured, using the measured value to raw material containing CaO
16 use level, the use level of coagulated material 18, the additive amount of water 34, the travel speed of the pallet trolley 44 of sintering machine, gas
At least one of supply amount and the supply amount of oxygen of fuel are adjusted.
It is former by the sintering that will be combined with a part of iron-bearing material 12, raw material containing CaO 16, return mine 74 and coagulated material 18
Material is put into drum mixer 36, and water is added in the raw materials for sintering and is granulated, and the second half section investment condensation when being granulated
The remainder of material 18, can there are the carbon material external particle of coagulated material 18 works by the surface layer for the raw materials for sintering being granulated
Raw materials for sintering to be granulated uses.As condense raw material in add water and be granulated when the second half section cooperation coagulated material,
Powdered coke, anthracite can be used.
Be arranged multiple drum mixers 36 and using there are the carbon material external particles of coagulated material 18 on surface layer the case where
Under, by the latter half of the drum mixer 36 by some or all of coagulated material 18 investment to the end, utilization is above-mentioned
Method puts into raw materials for sintering in drum mixer 36, can to surface layer there are the carbon material external particle of coagulated material 18 into
Row is granulated.In turn, the water that raw materials for sintering is made an addition to when being provided with multiple drum mixers 36 can use the 1st drum mixer
The whole water of 36 additions also can use the 1st drum mixer 36 and add a part of water, and by another drum-type of remainder
Mixing machine 36 adds.
It shown in present embodiment from the mixing channel 22~28 of raw material supply unit 20 and cuts out each raw material, carrying conveyer
Raw materials for sintering is made on 30 and the example of the raw materials for sintering as obtained by the granulation of drum mixer 36 is made, but it is not limited to this.Example
Such as, by the way that iron-bearing material 12 will be combined with and 74 raw materials for sintering of returning mine is put into drum mixer 36, in raw materials for sintering
Addition water is granulated, and when being granulated, second half section investment raw material containing CaO 16 or raw material containing CaO 16 and coagulated material 18, can be incited somebody to action
Surface layer has raw material containing CaO 16 or raw material containing CaO 16 and the granulated particles of coagulated material 18 to be made as the raw materials for sintering being granulated
With.In this case, using infrared analyzer 32 at least one of iron-bearing material 12 and above-mentioned raw materials for sintering at
Point concentration is measured, and is added using the measured value to the use level of raw material containing CaO 16, the use level of coagulated material 18, water 34
Dosage, the travel speed of the pallet trolley 44 of sintering machine, oxygen in the supply amount and sintering machine of gaseous fuel on sintering machine
At least one of supply amount is adjusted.
By a part for being combined with iron-bearing material 12, a part for 74, raw material containing CaO 16 of returning mine or raw material containing CaO 16
It is put into drum mixer 36 with the raw materials for sintering of a part of coagulated material 18, water is added in raw materials for sintering and is made
Grain, when being granulated, the remainder of the remainder of second half section cooperation raw material containing CaO 16 and coagulated material 18, can will be granulated
The surface layer granulated particles that there is raw material containing CaO 16 and coagulated material 18 of raw materials for sintering make as the raw materials for sintering being granulated
With.
Multiple drum mixers 36 are set and there is raw material containing CaO 16 or raw material containing CaO 16 and coagulated material 18 to surface layer
Granulated particles be granulated in the case where, by the way that some or all of raw material containing CaO 16 and coagulated material 18 are put into
The latter half of last drum mixer 36 is put into raw materials for sintering in drum mixer 36 using the above method, can be with
The granulated particles that there is raw material containing CaO 16 and coagulated material 18 to surface layer are granulated.
It is shown in present embodiment and cuts out each raw material from the mixing channel 22~28 of raw material supply unit 20 and conveyed carrying
The example of raw materials for sintering is made on machine 30, but it is not limited to this.For example, by being cut out from the mixing channel 22~28 of raw material supply unit 20
Each raw material a part directly with carry conveyer 30 be transported to drum mixer 36, by remainder with carrying conveyer
30 different carrying conveyers are transported to high-speed stirring apparatus and are stirred.Thereafter, which can be mixed with drum-type
The pelletizers such as conjunction machine or granulator (Pelletizer) are granulated, and it is defeated to put into carrying after dry with drying machine as needed
It send machine 30 or carries conveyer 38.The remainder can also not have to drum mixer or granulator after stir process
(Pelletizer) etc. pelletizers are granulated and are directly thrown into and carry in conveyer 30.In turn, can also with this high speed
Setting pulverizing process and/or riddler's sequence before agitating device is stirred.There are when multiple drum mixers 36, can throw
Enter to the carrying conveyer between any drum mixer.
It is shown in present embodiment and the infrared analyzer 32 in mensuration operation is set to mixing channel 28 is mixed with drum-type
The example carried on conveyer 30 between conjunction machine 36, but it is not limited to this.For example, infrared analyzer 32 can be set to
Stockyard 11 and the carrying carried between conveyer 14, mixing channel 22 and mixing channel 24 between the mixing channel 22 for entering side are defeated
It send on the carrying conveyer 38 between machine 30 or drum mixer 36 and sintering machine 40.Wherein, using surface layer, there are coagulated materials
18 or raw material containing CaO 16 and coagulated material 18 granulated particles when, there are surface layer compositions to impact the measurement of constituent concentration
A possibility that, therefore more preferably in the carrying conveyer 30 carried between conveyer 14, mixing channel 22 and mixing channel 24 or mix
Infrared analyzer 32 is set on the carrying conveyer 30 between slot 28 and drum mixer 36.
Infrared analyzer 32 in mensuration operation be not limited to 1 also can be set it is multiple, can carry conveyer 14,
The carrying conveyer 30 carried between conveyer 30, mixing channel 28 and drum mixer 36 between mixing channel 22 and mixing channel 24
With the infrared analyzer for carrying setting 2 or more on conveyer 38.Can be used multiple infrared analyzers to raw materials for sintering,
Constituent concentration of more than two kinds in iron-bearing material 12 and the raw materials for sintering being granulated is measured, using the measured value to containing CaO
The use level of raw material 16, the use level of coagulated material 18, the additive amount of water 34, sintering machine pallet trolley 44 travel speed,
At least one of the supply amount of oxygen in the supply amount and sintering machine of gaseous fuel on sintering machine is adjusted.
Embodiment
(embodiment 1)
Finished product sinter all is manufactured using sinter manufacturing device 10 shown in Fig. 1 in example 1, comparative example 1.
In example 1, the constituent concentration of raw materials for sintering is carried out continuously using the infrared analyzer 32 for carrying conveyer 30 is set to
Measurement, using the constituent concentration of measurement, adjust the use level of raw material containing CaO 16 so that raw materials for sintering basicity (CaO/SiO2) reach
To target basicity (CaO/SiO2) and manufacture finished product sinter 36 hours.On the other hand, in comparative example 1, without METHOD FOR CONTINUOUS DETERMINATION
And the constituent concentration of raw materials for sintering was measured in every 2 hours off-line manner, using the constituent concentration of measurement, adjustment contains
The use level of CaO raw material 16 so that raw materials for sintering basicity (CaO/SiO2) reach target basicity (CaO/SiO2) and manufacture finished product
Sinter 36 hours.
Fig. 2 is the figure of the variation of the basicity for indicating the raw materials for sintering of example 1 and the drop strength of finished product sinter.Fig. 3
It is the figure of the drop strength for the basicity and finished product sinter for indicating the raw materials for sintering of comparative example 1.(a) in (a), Fig. 3 in Fig. 2
Shown basicity refers to total CaO concentration in raw materials for sintering divided by SiO2It is worth obtained by concentration.In (b), Fig. 3 in Fig. 2
(b) drop strength shown by refers to the intensity measured using drop strength test method specified in JIS M 8711.
As shown in (a) and (b) in Fig. 2, in example 1, and the deviation of target value of basicity of raw materials for sintering becomes smaller, at
The variation of the drop strength of product sinter also becomes smaller.METHOD FOR CONTINUOUS DETERMINATION is carried out to the constituent concentration of raw materials for sintering in example 1.Cause
This can also be detected in early stage the variation of the constituent concentration, and adjustment contains in early stage even if constituent concentration unexpectedly changes
The use level of CaO raw material 16 is so that the constituent concentration reaches target value.As a result, in example 1, it can reduce and raw materials for sintering
The variation of the deviation and basicity of the target value of basicity, the variation that can reduce the drop strength of finished product sinter also become smaller.
On the other hand, as shown in (a) and (b) in Fig. 3, in comparative example 1, the basicity of raw materials for sintering becomes relative to target value
Move larger, the drop strength of finished product sinter also changes larger, produces the low finished product sinter of drop strength.Finished product sinter
Drop strength it is low when, impact when carrying, be encased in blast furnace due to is easy to crush, and the granularity of finished product sinter changes.Finished product
The granularity of sinter changes an important factor for being the raw material loading distribution disorders in blast furnace, thus not preferred.
According to these results, it is thus identified that by using the manufacturing method of example 1, the ingredient of finished product sinter can be manufactured
The variation of concentration and the equable finished product sinter of drop strength.
(embodiment 2)
Finished product sinter all is manufactured using sinter manufacturing device 10 shown in Fig. 1 in example 2, comparative example 2.
In example 2, the concentration of carbon of raw materials for sintering is continuously surveyed using the infrared analyzer 32 for carrying conveyer 30 is set to
It is fixed, and the use level of coagulated material 18 is adjusted so that the concentration of carbon of raw materials for sintering reaches aimed concn using the concentration of carbon of measurement
And manufacture finished product sinter 36 hours.On the other hand, in comparative example 2, every 4 hours off-line manner without METHOD FOR CONTINUOUS DETERMINATION
The concentration of carbon of raw materials for sintering is measured, the use level of coagulated material 18 is adjusted using the concentration of carbon of measurement so that sintering is former
The concentration of carbon of material reaches aimed concn and manufactures finished product sinter 36 hours.The target value of the concentration of carbon of raw materials for sintering is based on as follows
Carbon amounts and determine, the liquid fraction of the raw materials for sintering when carbon amounts is the ingredient using raw materials for sintering and calculates sintering is in preferred model
The sintering temperature enclosed, the carbon amounts that raw materials for sintering can be made to be warming up to the sintering temperature because of the burning of carbon.Example 2, comparative example 2
In raw materials for sintering is all changed to the high raw materials for sintering of concentration of carbon in the manufacture midway of finished product sinter, thereafter, by raw materials for sintering
Restore and continue the production of finished product sinter.
Fig. 4 is the travel speed for indicating the productivity of the sintering machine of example 2, the concentration of carbon of raw materials for sintering and pallet trolley
Variation figure.Fig. 5 is the traveling for indicating the productivity of the sintering machine of comparative example 2, the concentration of carbon of raw materials for sintering and pallet trolley
The figure of the variation of speed.(a) in (a), Fig. 5 in Fig. 4 shows productivity (t/ (h × m of sintering machine2)) variation.Sintering
Productivity (t/ (h × m of machine2)) refer to the quality (t) of the every 1 hour sinter cake by sintering machine production divided by the face of pallet trolley
Product (m2) and the value of calculating.(b) in (b), Fig. 5 in Fig. 4 shows the variation of the concentration of carbon (quality %) of raw materials for sintering.Fig. 4
In (c), (c) in Fig. 5 show pallet trolley travel speed (m/min) variation.It is surrounded in Fig. 4, Fig. 5 with dotted line frame
Part all indicates " during raw material changes " that is changed to the high raw materials for sintering of concentration of carbon.
In example 2, METHOD FOR CONTINUOUS DETERMINATION is carried out to the concentration of carbon of raw materials for sintering adjusting the use level of coagulated material 18 so that
Concentration of carbon reaches target value.Since the constituent concentration as above to raw materials for sintering carries out METHOD FOR CONTINUOUS DETERMINATION, can be changed in raw material
The rising of the initial stage detection concentration of carbon of period, using the concentration in the adjustment of the use level of early implementation coagulated material 18 so as to burn
The concentration of carbon of knot raw material reaches target concentration of carbon.As a result, as shown in (b) in Fig. 4, the rising of the concentration of carbon of raw materials for sintering is obtained
Inhibit, as shown in (c) in Fig. 4, sinter can be manufactured in the case where not reducing the travel speed of pallet trolley, ties
As shown in (a) in Fig. 4 being greatly reduced for the productivity of sintering machine 40 does not occur for fruit.
On the other hand, in comparative example 2, since the concentration of carbon not to raw materials for sintering carries out METHOD FOR CONTINUOUS DETERMINATION, raw materials for sintering
Concentration of carbon rise detection delay.Therefore, as shown in (b) in Fig. 5, the concentration of carbon of raw materials for sintering rises significantly.Because carbon is dense
The rising of degree and make sinter cake when the temperature is excessively high can to cooler 60 apply overload, it is therefore desirable to reduce the row of pallet trolley
The load of cooler 60 is reduced into speed.Therefore, as shown in (c) in Fig. 5, the travel speed of pallet trolley is reduced in advance,
As a result, the productivity of sintering machine 40 substantially reduces as shown in (a) in Fig. 5.
In this way, by using the manufacturing method of example 2, it, also can be in early stage even if the concentration of carbon of raw materials for sintering changes
The variation for detecting concentration of carbon, the variation with the concentration of carbon correspondingly adjust the use level of coagulated material 18 in early stage.It is sintered as a result,
The variation of the concentration of carbon of raw material becomes smaller, and the variation of heat when sinter manufactures also becomes smaller, and inhibits into as a result, can be confirmed
The temperature of product sinter rises, it is suppressed that the reduction of the productivity of sintering machine 40.
Symbol description
10 sinter manufacturing devices
11 stockyards
12 iron-bearing materials
14 carry conveyer
16 raw materials containing CaO
17 raw materials containing MgO
18 coagulated materials
20 raw material supply units
22 mixing channels
24 mixing channels
25 mixing channels
26 mixing channels
28 mixing channels
30 carry conveyer
32 infrared analyzers
34 water
36 drum mixers
38 carry conveyer
40 sintering machines
42 raw materials for sintering feedways
44 pallet trolleys
46 ignition furnaces
47 gas-fuel feeders
48 bellows
50 pulverizers
60 coolers
70 screening plants
72 finished product sinters
74 return mine
76 carry conveyer
78 carry conveyer
80 blast furnaces
Claims (5)
1. a kind of manufacturing method of sinter, in the raw materials for sintering for being at least combined with iron-bearing material, raw material containing CaO and coagulated material
Middle addition water is granulated, and is sintered in sintering machine to manufacture sinter, the manufacturing method has following process:
Mensuration operation, to the ingredient of at least one of the iron-bearing material, the raw materials for sintering and the raw materials for sintering that has been granulated
Concentration carries out METHOD FOR CONTINUOUS DETERMINATION,
Process is adjusted, using the constituent concentration measured in the mensuration operation, to the use level of the raw material containing CaO, described solidifying
At least one of the use level of material, travel speed of pallet trolley of the additive amount of the water and the sintering machine is tied to carry out
Adjustment.
2. the manufacturing method of sinter according to claim 1, wherein further cooperate in the raw materials for sintering and contain
MgO raw material,
In the adjustment process, using the constituent concentration measured in the mensuration operation, to the use level of the raw material containing CaO,
Use level, the use level of the coagulated material, the plate-pedestal of the additive amount of the water and the sintering machine of the raw material containing MgO
At least one of travel speed of vehicle is adjusted.
3. a kind of manufacturing method of sinter, in the raw materials for sintering for being at least combined with iron-bearing material, raw material containing CaO and coagulated material
Middle addition water is granulated, and is directed at the raw materials for sintering while gaseous fuelled and oxygen in sintering machine and is sintered to make
Sinter is made, the manufacturing method has following process:
Mensuration operation, to the ingredient of at least one of the iron-bearing material, the raw materials for sintering and the raw materials for sintering that has been granulated
Concentration carries out METHOD FOR CONTINUOUS DETERMINATION,
Process is adjusted, using the constituent concentration measured in the mensuration operation, to the use level of the raw material containing CaO, described solidifying
Tie the use level of material, the additive amount of the water, the sintering machine pallet trolley travel speed, the gaseous fuel confession
It is adjusted at least one of the supply amount of amount and the oxygen.
4. the manufacturing method of sinter according to claim 3, wherein further cooperation contains in the raw materials for sintering
MgO raw material,
In the adjustment process, using the constituent concentration measured in the mensuration operation, to the use level of the raw material containing CaO,
Use level, the use level of the coagulated material, the plate-pedestal of the additive amount of the water, the sintering machine of the raw material containing MgO
At least one of the travel speed of vehicle, the supply amount of the gaseous fuel and supply amount of the oxygen are adjusted.
5. the manufacturing method of sinter according to any one of claims 1 to 4, wherein right in the mensuration operation
Total CaO, SiO2、MgO、Al2O3, one or more of FeO, C and moisture constituent concentration be measured.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017026992 | 2017-02-16 | ||
| JP2017-026992 | 2017-02-16 | ||
| PCT/JP2018/004516 WO2018151024A1 (en) | 2017-02-16 | 2018-02-09 | Method for manufacturing sintered ore |
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| Publication Number | Publication Date |
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| CN110325654A true CN110325654A (en) | 2019-10-11 |
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| CN201880011926.7A Pending CN110325654A (en) | 2017-02-16 | 2018-02-09 | The manufacturing method of sinter |
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| Country | Link |
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| EP (1) | EP3550037A4 (en) |
| JP (1) | JP6680369B2 (en) |
| KR (1) | KR102290001B1 (en) |
| CN (1) | CN110325654A (en) |
| PH (1) | PH12019501877A1 (en) |
| TW (1) | TWI658148B (en) |
| WO (1) | WO2018151024A1 (en) |
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| CN111263822A (en) * | 2017-10-25 | 2020-06-09 | 杰富意钢铁株式会社 | Method for producing sintered ore |
| CN111440943B (en) * | 2020-04-29 | 2022-02-11 | 河北龙凤山铸业有限公司 | Method for accurately controlling trace elements of sintered ore |
| KR102449020B1 (en) * | 2020-09-28 | 2022-09-28 | 주식회사 포스코아이씨티 | System and Method for Predicting Strength of Sintered Ore |
Citations (1)
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| CN105821205A (en) * | 2015-01-07 | 2016-08-03 | 宝山钢铁股份有限公司 | Processing equipment for sintering mixture and processing method thereof |
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| JPS55122831A (en) | 1979-03-15 | 1980-09-20 | Sumitomo Metal Ind Ltd | Coke blend controlling method in sintered ore manufacture |
| JPS5665943A (en) * | 1979-11-02 | 1981-06-04 | Sumitomo Metal Ind Ltd | Controlling method for basicity of sintered ore |
| JPS57149433A (en) * | 1981-03-07 | 1982-09-16 | Nisshin Steel Co Ltd | Method and device for preparing sintered ore having preset content of feo |
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| Publication number | Publication date |
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| WO2018151024A1 (en) | 2018-08-23 |
| KR20190109451A (en) | 2019-09-25 |
| KR102290001B1 (en) | 2021-08-13 |
| EP3550037A1 (en) | 2019-10-09 |
| EP3550037A4 (en) | 2020-01-08 |
| JPWO2018151024A1 (en) | 2019-04-25 |
| JP6680369B2 (en) | 2020-04-15 |
| TW201833337A (en) | 2018-09-16 |
| PH12019501877A1 (en) | 2020-03-16 |
| TWI658148B (en) | 2019-05-01 |
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