CN105593380A - Method and plant for removing arsenic and/or antimony from flue dusts - Google Patents
Method and plant for removing arsenic and/or antimony from flue dusts Download PDFInfo
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- CN105593380A CN105593380A CN201480052853.8A CN201480052853A CN105593380A CN 105593380 A CN105593380 A CN 105593380A CN 201480052853 A CN201480052853 A CN 201480052853A CN 105593380 A CN105593380 A CN 105593380A
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- coke
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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
- C21B5/008—Composition or distribution of the charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A method for the treatment of flue dusts containing arsenic and/or antimony from pyrometallurgical methods, wherein a reducing agent is added to the flue dusts, the flue dusts are heated together with the reducing agent, and volatile components are separated from a slag. The reducing agent is a carbonaceous compound.
Description
Technical field
The present invention relates to by rotary chute (rotatingchute) carry out raw material to packing in blast furnace to blast furnaceThe method of charging feedstock.
Background technology
In recent years, require to cut down CO from preventing the viewpoint of global greenhouse effect2. In steel industry, CO2DischargeAbout 70% of amount is caused by blast furnace, thereby requires to cut down the CO in blast furnace2Discharge rate. At this, think high by cutting downThe reducing material (coke, micro mist charcoal, natural gas etc.) using in stove can be realized the CO in blast furnace2Cut down.
But, cutting down reducing material, particularly coke in the situation that, because the coke of guaranteeing aeration in stove reduces,Therefore can cause the interior aeration resistance of stove of blast furnace to increase.
This be because, in general blast furnace, in the time reaching the ore being loaded into from furnace roof and start softening temperature, oreBecause limit, landfill space, the deadweight limit distortion of the raw material that is present in top is shunk. Therefore,, at bottom house, form the logical of ore layerThereby atmidometer is almost immobilising adhesion coating (cohesivelayer) of gas greatly, and the aeration of this adhesion zone is whole to blast furnaceThe aeration of body produces a very large impact. And, known to improve the aeration resistance of this adhesion zone, mix at ore class raw material layerCoke is effectively, in order to obtain the appropriate admixture of ore class raw material layer, has reported a lot of results of study.
For example, following technology is disclosed in patent documentation 1: at bell-free blast furnaces (bell-lessblastfurnace)In, in the ore hopper in the downstream in ore hopper, pack coke into, on conveyer, make coke build-up on ore, soAfter they are loaded to furnace top bin (furnacetopbunker), make ore and coke pack blast furnace into via rotary chuteIn.
In addition, following technology being disclosed in patent documentation 2: makes ore and coke hold respectively the feed bin staying in furnace roofAfter, coke and ore are mixed and packed into simultaneously, carry out thus conventionally packing into in batch (batch), coke of coke simultaneouslyThe heart pack into batch and mix and pack into batch this three batches packs into.
In addition, in patent documentation 3, in order to prevent the destabilization of the adhesion zone shape in blast furnace operation and to improve gasUtilization rate, in the time packing the raw material of blast furnace into, mixes whole ores and whole coke completely.
And, following technology is disclosed in patent documentation 4: as obtaining the reactivity raising realizing based on mixing cokeThe means of effect, mix by height being reacted to the ore that coke is low with JIS reproducibility, make hypoergia ore anti-expeditiouslyThereby should improve the reactivity of blast furnace.
Formerly technical literature
Patent documentation
Patent documentation 1: Japanese kokai publication hei 3-211210 communique
Patent documentation 2: TOHKEMY 2004-107794 communique
Patent documentation 3: Japanese kokai publication sho 53-152800 communique
Patent documentation 4: Japanese kokai publication sho 64-36710 communique
Patent documentation 5: TOHKEMY 2012-188744 communique
Patent documentation 6: TOHKEMY 2012-21227 communique
Patent documentation 7: TOHKEMY 2012-112032 communique
Non-patent literature
Non-patent literature 1: iron と Steel (iron and steel) No. 4 S3 pages of 72 volume (1986)
Summary of the invention
The problem that invention will solve
In addition, in order to improve the aeration resistance of adhesion zone, as above-mentioned patent documentation 3 is recorded and as previously mentioned, knownIt is effective in ore layer, being pre-mixed coke. Therefore, report has the technology of mixing coke in a large number in ore layer.
But, conventionally, in the stove of blast furnace, there is the air-flow distribution (gasflow in the blast furnace on radial directionDistribution), for example, as a rule, in dimensionless fire door radius, easily flow at central part and periphery gasMoving, at pars intermedia gas be not easy to flow (with reference to Fig. 1).
Therefore, need to distribute to control coke composite rate and the reactive radial direction distribution of ore according to its air-flow.
But patent documentation 1～3 has only been recorded to the means of ore layer mixing coke, clearly do not record stove radius sideSuitable coke composite rate upwards distributes.
In addition, in patent documentation 4, also only record reactivity and the maximum particle size thereof of coke and ore, clearly do not rememberedCarry the suitable coke composite rate distribution in match ratio and the fire door direction of suitable coke and ore.
And, in patent documentation 5,6, also all disclose to counting 0.8～1.0 model with blast furnace hole dimensionless radiusEnclose the content that packs coke mixed layer into. But, although improved the ore reduction of blast furnace periphery by these operations, alsoNot mentioning the reproducibility of blast furnace central portion improves.
Therefore, improve in order to seek further reproducibility, need to study the reproducibility of blast furnace central portion and improve means.
In addition, in patent documentation 7, disclose in the scope of counting 0.7～1.0 with blast furnace hole dimensionless radius in-builtEnter the technology of the raw material that the such pulverization rate in blast furnace of high RDI ore is high, but this technology is to guarantee aeration in blast furnaceBe the 1st object, do not touch reduction reaction.
The present invention researches and develops in order to solve above-mentioned problem, and its object is to provide a kind of blast furnace raw material charging method,Cause the anti-of charging feedstock in this cross-wise direction even if exist air-flow to distribute in the horizontal cross-section direction because of in blast furnaceAnswer in the situation that speed is different, also can make more expeditiously raw material reaction.
For solving the means of problem
, described in purport of the present invention is constructed as follows.
1, to a method for blast furnace charging feedstock, when filling with substance uses rotary chute to form coke crack layer each time, withIn backward blast furnace, pack the mixed layer that ore class raw material and coke are mixed into, in such blast furnace operation,
60～75 quality % of the amount of coke in once feeding described in described mixed layer uses, and described coke crack layerThe remainder of the amount of coke in once feeding described in use, and, in the scope that is 0.4～0.8 at fire door dimensionless radiusMore than packing 70 quality % of the coke in described mixed layer into.
2, to a method for blast furnace charging feedstock, when filling with substance uses rotary chute to form coke crack layer each time, withIn backward blast furnace, pack the mixed layer that ore class raw material and coke are mixed into, in such blast furnace operation,
60～75 quality % of the amount of coke in once feeding described in described mixed layer uses, and described coke crack layerThe remainder of the amount of coke in once feeding described in use, and, packing into of described mixed layer is divided into 2 batches, at fire doorDimensionless radius is to pack the 2nd batch in 0.6～1.0 scope.
3, the method to blast furnace charging feedstock as claimed in claim 2, wherein,
In the time using massive ore as ore class raw material, make the ratio at described the 2nd batch of massive ore packing intoFor 70～100 quality % in the total amount of feeding each time of this massive ore.
4, the method to blast furnace charging feedstock as claimed in claim 3, wherein,
The 1st batch of ore class raw material packing into before described the 2nd batch is more than 60% ore deposit by reproducibility (RI)Stone class raw material forms.
Invention effect
According to the present invention, mix the coke of volume at the position that air-flow is few, and it is many to make hypoergia raw material be partial to air-flowPosition, the raw material reaction at the position that air-flow is few is relatively improved, can seek thus the raising of reaction in furnace, therebyCan carry out stable blast furnace operation.
Brief description of the drawings
Fig. 1 is the figure that represents that the air-flow in blast furnace distributes.
Fig. 2 is the schematic diagram representing to the main points of blast furnace charging feedstock.
Fig. 3 represents the figure of raw material to the accumulation situation of blast furnace.
Fig. 4 is the figure that represents the relation between the raw material RI shown in non-patent literature 1 and efficiency of shaft estimated value.
Fig. 5 represents the figure of massive ore to the relation between the segregation ratio of O2 and the average RI of O1.
Fig. 6 is the figure that represents the load softening test device using in embodiment.
(a) of Fig. 7 and (b) of Fig. 7 be represent gas flow and gas composition, to fire door dimensionless radius pars intermediaOr the figure of the condition simulated of periphery.
Fig. 8 is the figure of the percent reduction while representing 1200 DEG C of arrival in load softening test.
Detailed description of the invention
Below, specifically describe the present invention.
Illustrate to what pack ore class raw material and coke in blast furnace into and specifically pack main points into based on Fig. 2. It should be noted that,Blast furnace is also referred to as stove.
It should be noted that, in figure, Reference numeral 10 is blast furnace, and Reference numeral 12a～12c is furnace top bin, accompanying drawing markNote 13 is flow control valve, and Reference numeral 14 is set hopper, and Reference numeral 15 is without clock-type charging apparatus, Reference numeral 16For rotary chute.
At this, in the present invention, will use sintering deposit, pellet (pellet), massive ore etc. to pack into as blast furnaceRaw material and the raw material of normally used ore class raw material and coke, charging (eachcharge) is each time used rotary chuteIn blast furnace, pack into, the once charging in the present invention refers to be carried out following operation once, forms the coke that has used cokeCrack layer (cokeslit), packs the mixed layer that ore class raw material and coke are mixed subsequently into.
As the order from furnace top bin charging feedstock, first, form the situation of coke crack layer at the central part of blast furnaceUnder, pack the raw material of rotary chute 16 into destination and be made as high furnace interior, pack Jiao into from the furnace top bin 12a that is only incorporated with cokeCharcoal, forms coke layer thus. Now, can form central coke layer at the central part of blast furnace, or from furnace wall periphery towards centerPortion and form periphery coke layer.
Then, carry out in the mode of while blanking (discharge) that coke packs into from furnace top bin 12a, 12b or 12c andOre packs into, and the order that packs into is now, near the position central shaft of blast furnace, position that fire door dimensionless radius is 0Move successively upward, leave laterally from the central shaft of blast furnace afterwards, finally pack upper end (the fire door dimensionless of sloped sidewall intoRadius: 1.0) side.
In the present invention, special, adjust as follows: 60～75 matter that make the amount of coke in once feedingAmount % becomes the mixed layer with ore class raw material, the scope that the coke in this mixed layer is 0.4～0.8 at fire door dimensionless radiusMore than being inside loaded into 70 quality % in above-mentioned 60～75 quality %.
In addition, for the remainder of the coke of above-mentioned mixed layer the coke of 25～40 quality % as above-mentioned cokeCrack layer (comprising in the present invention central coke layer and periphery coke layer) and packing into.
By adopting such step that packs into, can seek the raising of reaction in furnace, thereby can carry out stable heightStove operation.
In addition, when pack ore class raw material (formation of mixed layer) into blast furnace, preferably in feeding each time, make raw materialTo pack into be 2 batches. And, in the scope that is 0.6～1.0 at fire door dimensionless radius, pack the 2nd batch into, make the above-mentioned the 1stThe amount of coke of mixing in batch is in the amount of coke (once 60～75 quality % of the amount of coke in charging) in above-mentioned mixed layer60～80 quality %, can seek thus the further raising of reaction in furnace, do thereby can carry out more stable blast furnaceIndustry.
Raw material shown in Fig. 3 is to the accumulation situation of blast furnace. The 1st batch is loaded into fire door dimensionless radius and counts 0～0.8Region, the ore of the 2nd batch be loaded to fire door dimensionless radius count more than 0.6 until furnace wall (fire door dimensionlessRadius: the region 1.0). Knownly pack under state this, the 2nd batch is roughly loaded into gas and holds runny stove weekLimit portion. Therefore, if make to mix coke segregation and make the segregation of hypoergia ore in the 1st batch in the 2nd batch, can the phaseReactivity in response delay to be improved region. It should be noted that, the 1st batch is not limited to fire door dimensionless radiuscopeBe 0～0.8 region, the position that packs into of the 2nd batch counts 0.6～1.0th with fire door dimensionless radius, important, further logicalCross and in the 2nd batch, make the segregation of hypoergia ore, can realize effect of the present invention.
In addition, can make above-mentioned is more than 60% ore at the 1st batch of ore class raw material packing into by reproducibility (RI)Class raw material forms.
Raw material RI shown in non-patent literature 1 shown in Fig. 4 and efficiency of shaft (shaftefficiency) estimated value itBetween relation. At this, efficiency of shaft is the index that represents the reaction efficiency of the ore in blast furnace. According to non-patent literature 1(Fig. 4) known, at RI, lower than 60% in the situation that, efficiency of shaft reduces. Therefore, being desirably in pars intermedia that air-flow is few packs RI into and isMore than 60% ore, thereby and RI pack the many reactive peripheries that are protected of air-flow into lower than 60% raw material. In addition,According to above-mentioned Fig. 4, be more than 62% the 1st batch of preferred reproducibility of ore class raw material (RI) packing into.
In addition, the present invention can use massive ore as ore class raw material, and in the time using massive ore, expectation will be upperThe ratio of stating the 2nd batch of massive ore packing into is made as 70～100 matter in the total amount of charging each time of this massive oreAmount %.
Massive ore to the relation between the segregation ratio of O2 (the 2nd batch) and the average RI of O1 (the 1st batch) as Fig. 5 instituteShow.
This illustrates following situation: by making the massive ore of low RI to O2 segregation, the massive ore packing into O1 is relativeReduce, therefore the RI of O1 rises.
At this, massive ore RI is made as to 30%, the average RI of sintering deposit is made as to 65%. By making massive ore to O2Segregation ratio be more than 70% and reduce the massive ore amount of O1, do not allow the value of the RI in runny O1 can as gasGuarantee more than 62%. Therefore, expect massive ore to be made as more than 70% to the segregation ratio of O2.
Embodiment
Fig. 6 illustrates the load softening test device using in the present embodiment. In figure, Reference numeral 21 is crucible, accompanying drawing markNote 22 is raw material, and Reference numeral 23 is load charger, and Reference numeral 24 is jumper bar (punchrod), and Reference numeral 25 isHeater, Reference numeral 26 is furnace core tube, and Reference numeral 27 is thermocouple, and Reference numeral 28 is gas mixer, accompanying drawing markNote 29 is gas analyzing apparatus, and Reference numeral 30 is droppings sampling apparatus.
This load softening test device is the device of the reaction movement of the ore in analog blast furnace, can simulate reaction in furnaceProperty, i.e. reduction reaction in blast furnace. Use this experimental rig, in the condition shown in table 1, table 2, Fig. 7 (a) and Fig. 7 (b)Under, determine specimen temperature and gas composition, make to simulate the pars intermedia of fire door dimensionless radius or the gas flow of periphery,And measure percent reduction while arriving 1200 DEG C (following, also referred to as percent reduction).
At the radial direction pars intermedia of blast furnace, the intensification of raw material is slow, and for ore as the reducing gases scale of constructionCO few, thereby therefore the fast CO gas concentration of the consumption of reducing gas reduces. Consider this situation, based on model calculate and will inBetween the evaluation of the raw material that packs into of portion be made as temperature and the gas composition of Fig. 7 (a).
On the other hand, at the peripheral direction of blast furnace, the quick heating of raw material, and for ore as reducing gasThe CO of amount is many, and therefore the consumption of reducing gas is few, thereby CO gas concentration is high. Consider this situation, calculate and will be to based on modelThe evaluation of the raw material that periphery packs into is made as Fig. 7's temperature and the gas composition of (b).
It should be noted that, in the time of experiment, the 1st batch packs into blast furnace pars intermedia, and the 2nd batch fills to blast furnace peripheryEnter, therefore in the time of the simulation material condition of the 1st batch, under the condition of Fig. 7 (a), test, the 2nd batch of simulationWhen material condition, under the condition of Fig. 7 (b), test.
Table 1
Table 2
Table 1 shows mixed layer amount of coke that position that to make to fire door dimensionless radius be 0.4～0.8 packs into while changingThe variation of raw material reproducibility. With respect to example 1, the percent reduction of the example 2,4 of the amount of coke increase of mixed layer is gone up respectivelyRise. Example 3 with respect to example 1 make mixed layer amount of coke increase, but make fire door dimensionless radius be 0.4～0.8 and needPromote the coke ratio in the mixed layer at position of reduction to reduce, although therefore percent reduction to reduce be a little more than 50%.
On the other hand, the comparative example 1 that coke ratio in mixed layer reduces and the amount of coke that makes mixed layer are reducedThe percent reduction of comparative example 2 reduces.
Change to 0.8 to 0.1 comparative example 3, relatively about the scope that packs into that makes mixed layer with fire door dimensionless radiuscopeExample 5, even if guarantee the amount of coke of mixed layer, due to pack into scope with fire door dimensionless radius count 0.4～0.8 and need promoteCoke ratio in the mixed layer at the position of reduction reduces, thereby percent reduction also significantly reduces.
Make to pack into scope and change to 0.1～0.4 comparative example 4 similarly with fire door dimensionless radiuscope, even if guaranteeThe amount of coke of mixed layer, due to pack into scope with fire door dimensionless radius count 0.4～0.8 and needs promote the position of reductionCoke ratio in mixed layer reduces, thereby percent reduction also significantly reduces.
Table 2 shows packing into of mixed layer is divided into 2 batches, and to make to pack fire door dimensionless radius at the 2nd batch be 0.6The variation of the raw material reproducibility when rate of change of the mixed layer amount of coke in～1.0 scope. Meet example 1 of the present invention～7 all show more than 51 high percent reductions.
On the other hand, about the scope that packs into of the 2nd batch is made as to the comparative example 1 that fire door dimensionless radius is 0～0.8,Even if guarantee mixed layer amount of coke, percent reduction also significantly reduces. In addition, make the comparative example 2 of mixed layer amount of coke minimizing and make to mixClose a layer amount of coke and be increased to extraneous comparative example 3 of the present invention, its percent reduction also reduces.
In addition, under the gas temperature condition (intermediate conditions) of having simulated pars intermedia, mix and will mix in coke70% pack into the 1st batch ore the suitable mixing coke of condition and test. In addition, at the gas of having simulated peripheryUnder temperature condition (ambient conditions), test with following condition: the ore that packs RI≤62% in the 2nd batch intoCondition (case1); Pack the 70 quality % that mix in coke, the bar that packs remaining 30 quality % to periphery into into pars intermediaPart (case2); Pack the ore of RI≤62% into and make to mix the condition that coke is identical with case2 (case3) to periphery;And base condition (Base).
The reactivity that Fig. 8 shows respectively the each region in the situation of load softening test device to using Fig. 6 (arrivesPercent reduction 1200 DEG C time) result evaluated.
Known according to these results, by making raw material segregation, the reproducibility of pars intermedia improves, and the reproducibility of periphery is how manyVariation.
In addition, ore volume the root of pars intermedia and periphery will be obtained according to the layer thickness distribution of the ore layer shown in Fig. 3The percent reduction obtaining according to volume ratio averages is shown in Fig. 8 in the lump, known in the situation that carrying out segregation and packing into, totally comes upSee, and carry out when homogeneous packs into comparing, percent reduction improves.
More than show, by mixing the coke of volume and pack hypoergia raw material at the few position of air-flow, can seekThe raising of reaction in furnace.
Description of reference numerals
10 blast furnaces
12a～12c furnace top bin
13 flow control valves
14 set hoppers
15 without clock-type charging apparatus
16 rotary chutes
21 crucibles
22 raw materials
23 load chargers
24 jumper bars
25 heaters
26 furnace core tubes
27 thermocouples
28 gas mixers
29 gas analyzing apparatus
30 droppings sampling apparatuses
Claims (4)
1. to a method for blast furnace charging feedstock, when filling with substance uses rotary chute to form coke crack layer each time, with backwardIn blast furnace, pack the mixed layer that ore class raw material and coke are mixed into, in such blast furnace operation,
60～75 quality % of the amount of coke in once feeding described in described mixed layer uses, and described coke crack layer usesThe remainder of the amount of coke in described once charging, and, in the scope that is 0.4～0.8 at fire door dimensionless radius, pack intoMore than 70 quality % of the coke in described mixed layer.
2. to a method for blast furnace charging feedstock, when filling with substance uses rotary chute to form coke crack layer each time, with backwardIn blast furnace, pack the mixed layer that ore class raw material and coke are mixed into, in such blast furnace operation,
60～75 quality % of the amount of coke in once feeding described in described mixed layer uses, and described coke crack layer usesThe remainder of the amount of coke in described once charging, and, packing into of described mixed layer is divided into 2 batches, immeasurable at fire doorGuiding principle radius is to pack the 2nd batch in 0.6～1.0 scope.
3. the method to blast furnace charging feedstock as claimed in claim 2, wherein,
In the time using massive ore as ore class raw material, making in the ratio of described the 2nd batch of massive ore packing into is should70～100 quality % in the total amount of the charging each time of massive ore.
4. the method to blast furnace charging feedstock as claimed in claim 3, wherein, the 1st batch of dress before described the 2nd batchThe ore class raw material entering is that RI is that more than 60% ore class raw material forms by reproducibility.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-200037 | 2013-09-26 | ||
| JP2013200037 | 2013-09-26 | ||
| PCT/JP2014/004871 WO2015045369A1 (en) | 2013-09-26 | 2014-09-24 | Method for charging raw materials into blast furnace |
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| Publication Number | Publication Date |
|---|---|
| CN105593380A true CN105593380A (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480052853.8A Pending CN105593380A (en) | 2013-09-26 | 2014-09-24 | Method and plant for removing arsenic and/or antimony from flue dusts |
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| Country | Link |
|---|---|
| JP (1) | JP5776866B1 (en) |
| KR (1) | KR101668584B1 (en) |
| CN (1) | CN105593380A (en) |
| TR (1) | TR201603791T1 (en) |
| WO (1) | WO2015045369A1 (en) |
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| JP6269549B2 (en) * | 2015-03-26 | 2018-01-31 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP6447614B2 (en) * | 2016-01-20 | 2019-01-09 | Ｊｆｅスチール株式会社 | Raw material charging method to blast furnace |
| JP6439717B2 (en) * | 2016-02-18 | 2018-12-19 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP6627718B2 (en) * | 2016-10-29 | 2020-01-08 | Ｊｆｅスチール株式会社 | Raw material charging method for blast furnace |
| JP6627717B2 (en) * | 2016-10-29 | 2020-01-08 | Ｊｆｅスチール株式会社 | Raw material charging method for blast furnace |
| JP7127676B2 (en) * | 2019-10-28 | 2022-08-30 | Ｊｆｅスチール株式会社 | Method for charging raw materials into blast furnace and method for producing hot metal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102010920A (en) * | 2010-12-24 | 2011-04-13 | 宝钢集团新疆八一钢铁有限公司 | Method for smelting bell-less top blast furnace high proportion pellet ore burden structure |
| CN102471809A (en) * | 2009-08-10 | 2012-05-23 | 杰富意钢铁株式会社 | Blast-furnace operation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0776366B2 (en) | 1987-07-31 | 1995-08-16 | 新日本製鐵株式会社 | Blast furnace operation method |
| JP2820478B2 (en) | 1990-01-16 | 1998-11-05 | 川崎製鉄株式会社 | Feeding method for bellless blast furnace |
| JP4269847B2 (en) | 2002-08-30 | 2009-05-27 | Ｊｆｅスチール株式会社 | Raw material charging method for bell-less blast furnace |
| JP5751037B2 (en) | 2010-06-18 | 2015-07-22 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP5768563B2 (en) | 2010-11-02 | 2015-08-26 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP5299446B2 (en) | 2011-02-18 | 2013-09-25 | Ｊｆｅスチール株式会社 | Blast furnace operation method using ferro-coke |
| JP5834922B2 (en) | 2011-02-21 | 2015-12-24 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| CN104302786A (en) * | 2012-05-18 | 2015-01-21 | 杰富意钢铁株式会社 | Method for charging starting material into blast furnace |
-
2014
- 2014-09-24 TR TR2016/03791T patent/TR201603791T1/en unknown
- 2014-09-24 WO PCT/JP2014/004871 patent/WO2015045369A1/en active Application Filing
- 2014-09-24 KR KR1020167009481A patent/KR101668584B1/en active IP Right Grant
- 2014-09-24 JP JP2015517518A patent/JP5776866B1/en active Active
- 2014-09-24 CN CN201480052853.8A patent/CN105593380A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102471809A (en) * | 2009-08-10 | 2012-05-23 | 杰富意钢铁株式会社 | Blast-furnace operation method |
| CN102010920A (en) * | 2010-12-24 | 2011-04-13 | 宝钢集团新疆八一钢铁有限公司 | Method for smelting bell-less top blast furnace high proportion pellet ore burden structure |
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| KR20160044597A (en) | 2016-04-25 |
| JP5776866B1 (en) | 2015-09-09 |
| TR201603791T1 (en) | 2016-11-21 |
| WO2015045369A1 (en) | 2015-04-02 |
| KR101668584B1 (en) | 2016-10-21 |
| JPWO2015045369A1 (en) | 2017-03-09 |
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