CN107541584A - Treating agent for steelmaking and steelmaking method - Google Patents
Treating agent for steelmaking and steelmaking method Download PDFInfo
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- CN107541584A CN107541584A CN201710408069.1A CN201710408069A CN107541584A CN 107541584 A CN107541584 A CN 107541584A CN 201710408069 A CN201710408069 A CN 201710408069A CN 107541584 A CN107541584 A CN 107541584A
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- steel
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- slag
- sulfur
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- 238000000034 method Methods 0.000 title claims abstract description 119
- 238000009628 steelmaking Methods 0.000 title claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 207
- 239000010959 steel Substances 0.000 claims abstract description 207
- 239000002893 slag Substances 0.000 claims abstract description 105
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 86
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 70
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 70
- 239000004571 lime Substances 0.000 claims abstract description 70
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 69
- 230000023556 desulfurization Effects 0.000 claims abstract description 68
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 67
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 65
- 239000011593 sulfur Substances 0.000 claims abstract description 65
- 230000008569 process Effects 0.000 claims abstract description 24
- 230000009467 reduction Effects 0.000 claims description 64
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000292 calcium oxide Substances 0.000 claims description 13
- 239000010802 sludge Substances 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 238000005054 agglomeration Methods 0.000 claims description 11
- 230000002776 aggregation Effects 0.000 claims description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- -1 calcirm-fluoride Chemical compound 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 20
- 230000003009 desulfurizing effect Effects 0.000 description 13
- 239000000203 mixture Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000007670 refining Methods 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 229910052698 phosphorus Inorganic materials 0.000 description 7
- 239000011574 phosphorus Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 229910004072 SiFe Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
A treating agent for steelmaking comprises lime blocks and hot reducing slag, wherein the hot reducing slag is generated by performing desulfurization treatment on sulfur-containing molten steel for one time or more than one time; and the lime cake content is in the range of 1-85 parts by weight, calculated by the total weight of the hot reducing slag as 100 parts by weight. The invention also provides a steelmaking method using the steelmaking treating agent. The treating agent for steelmaking can be applied to a desulfurization or dephosphorization process, and the cost and the energy consumption in the steelmaking process can be greatly reduced because the treating agent for steelmaking contains hot reducing slag.
Description
Technical field
The present invention relates to a kind of steel-making inorganic agent and method for making steel, more particularly to a kind of steel-making containing thermal reduction slag
With inorganic agent and the method for making steel with the steel-making inorganic agent.
Background technology
Electric furnace (electric furnace) steel-making is a kind of method for carrying out smelting steel material with electric energy, mainly utilizes arc heat
Metal is melted, is one of modern state-of-the-art steel-making mode.Refined compared to blast furnace, converter and continuous casting (or molding) need to be used
The tediously long flow of steel, the technological process of electric furnace steel making is short, investment cost is low, steel-making speed is fast and production elasticity is high.In recent years
Further furnace volume is maximized, while the electric arc for ultra high power of arranging in pairs or groups improves the thermal efficiency of electric furnace, more significantly shortens
Smelting time, and reduce the power consumption needed for steel per ton.However, electric furnace molten steel technique still needs to continue towards saving energy at present
Source, the direction effort for promoting environmental protection.
The Taiwan crude steel yield of 2011 is about 23,100,000 tonnes, wherein there is 9,800,000 tonnes to come from electric furnace factory.
The flow of each electric furnace factory steel-making is roughly the same, mainly first carries out thick refining dephosphorization under oxidizing atmosphere using electric furnace, then carry out with ladle
Refining reduction desulfurization；The purpose of said process is to make phosphorus, sulphur etc. trace element removing, and the composition for adjusting steel avoids subsequently
There is cold short or hot-short phenomenon, and protect molten steel not by high-temperature oxydation, however, thick refining or refining can all have clinker generation.
The processing of oxidizing slag at present is mostly used for roadbed material (roadbed material) or filler (reclamation
Material) use.Though this way is considered as the two-fold advantage for having carbon reduction concurrently and scrap concrete recycles.But also
Former slag will expand after meeting water and volume is significantly increased, if reducing slag to be used to that in building construction structural member will to be caused or pave the way
The projection in face or cracking；It in order to solve the above problems, need to wait until that reducing slag is stable after prolonged preserving period, and will must also go back
Former slag is ground to very carefully, and it is too high so to instead result in processing cost.It is big based on cost consideration, recovery at present or recycling dealer
Arbitrarily handle reducing slag in a manner of throwing aside, hoard, bury etc. more；But this processing mode can have a strong impact on environment, so also
The processing of former slag is the problem of current slag treatment is most had a headache.
Common desulfurizing agent is for Main Ingredients and Appearance with calcium oxide (CaO) with Dephosphorising agent, and calcium oxide has good dephosphorization effect
Fruit, but its fusing point is up to 2570 DEG C, and melting speed is slow, causes smelting time to extend.To make desulfurizing agent or Dephosphorising agent while having
There are preferable desulfurization or dephosphorizing capacity and relatively low fusing point, reduce desulfurizing agent or Dephosphorising agent fusing point fluxing can be added mostly
Agent, reduce the time needed for melting.Conventional fluxing agent includes CaF2Though work well based on Environmental security consider without
It is recommended that use.
From the foregoing, at present still seek it is a kind of deal carefully with the method for electroslag, and it is expected obtain desulfurization and dephosphorization effect
Fruit is good, cheap and the desulfurization with fast liquefying and Dephosphorising agent (that is, steel-making inorganic agent).
The content of the invention
Therefore, the purpose of the present invention, i.e., a kind of it be applied to desulfurization or dephosphorization technology, manufacturing cost can be greatly reduced providing
And meet the steel-making inorganic agent of ecological requirements.
Then, steel-making inorganic agent of the invention, comprising：Lime block and thermal reduction slag, wherein, the thermal reduction slag is to make sulfur-bearing
Desulfurization process of the molten steel through once or more is generated；And using the gross weight of the thermal reduction slag as 100 listed as parts by weight, the stone
Grey block content range is 1~85 parts by weight.
Another object of the present invention is to provide a kind of method for making steel that can effectively reduce sulfur content.
Method for making steel of the present invention comprises the steps of：(S1) foregoing steel-making is added in sulfur-bearing molten steel with inorganic agent and carries out one
Secondary desulfurization process.
Another object of the present invention is to provide a kind of method for making steel that can effectively reduce phosphorus content.
Method for making steel of the present invention comprises the steps of：(P0) foregoing steel-making is added in phosphorous molten steel with inorganic agent and carries out one
Secondary dephosphorization treatment.
The effect of of the invention, is：The steel-making inorganic agent is to use desulfurization process of the sulfur-bearing molten steel through once or more
The thermal reduction slag generated, this thermal reduction slag are not necessary to by cooling granulation step and directly mixs with lime block and addition contains immediately
Desulfurization process is carried out in sulphur molten steel, therefore, compared to the existing process for making using the clinker through cooling granulation, present invention steel-making
When being applied to steel-making with inorganic agent, it is not necessary to can carry out desulfurized step by long-time heating melting step again.Present invention refining
Steel inorganic agent more can effectively reduce inorganic agent manufacturing cost, and reduce refining in addition to it can apply to desulfurization or dephosphorization technology
Energy waste in steel technique.
It will be described in detail below with regard to present invention：
Should " sulfur-bearing molten steel " word refer to sulfur-bearing molten steel without any desulfurization processing step or through once or more
The sulfur-bearing molten steel of desulfurization processing step.It is preferred that the sulfur-bearing molten steel is handled by electric furnace steel making mode.
It is slag of the sulfur-bearing molten steel through being generated during steel-making refining reduction desulfurization to be somebody's turn to do " thermal reduction slag ", wherein thermal reduction slag is to contain
There is the calcium oxide of a large amount.Compared to use in the past fusing point be 2570 DEG C of calcium oxide as desulfurizing agent, Dephosphorising agent, of the invention is general
The source for being use the thermal reduction slag for being rich in calcium oxide as lime is read, to reduce the usage amount of lime block, and by using
Fusing point is significantly lower than 2570 DEG C of thermal reduction slag, makes the fusing point of the steel-making inorganic agent (can be as desulfurizing agent or Dephosphorising agent) significantly
Reduce, while the steel-making containing the thermal reduction slag can rapidly be melted with inorganic agent and be reacted with molten steel, and then can shorten molten
The follow-up smelting time of steel, and help to extend the life-span of fire proof material of furnace lining.
Steel-making of the present invention includes lime block and thermal reduction slag with inorganic agent.The thermal reduction slag be make sulfur-bearing molten steel through once or
Desulfurization process more than once is generated, and using the gross weight of the thermal reduction slag as 100 listed as parts by weight, the lime block content range
For 1~85 parts by weight.
In a specific example of the present invention, the thermal reduction slag is to make sulfur-bearing molten steel handle through once desulfurization to be generated.Yu Ben
In another concrete example of invention, the thermal reduction slag is to make sulfur-bearing molten steel handle through secondary desulfuration to be generated.In the again another of the present invention
In one concrete example, the thermal reduction slag is sulfur-bearing molten steel is generated through desulfurization process three times.
It is preferred that the steel-making also includes adjustment component with inorganic agent.The adjustment component can be any desulfurization or dephosphorization technology
May use adjust molten steel form or property reagent.The adjustment component be such as, but not limited to aluminium, magnesium, manganese, silicon, carbon, iron,
Zinc, calcirm-fluoride (CaF2), calcium oxide, magnesia, iron oxide, iron containing alloy, aluminum oxide, silica or foregoing combination.This contains
Ferroalloy is such as, but not limited to SiMnFe, SiFe etc..
It is preferred that the steel-making suitable for sulfur removal technology includes lime block, thermal reduction slag, iron containing alloy and fluorine with inorganic agent
Change calcium.It is preferred that the steel-making suitable for dephosphorization technology includes lime block, thermal reduction slag and magnesia with inorganic agent.
It is preferred that the thermal reduction cinder ladle contains calcium oxide, silica and other components, the other components mainly contain it is following extremely
A kind of few material, the material are selected from aluminum oxide, magnesia, manganese oxide (MnO), carbon, iron oxide, zinc, calcirm-fluoride or foregoing
Combination.Compared to the converter that molten iron dephosphorization is carried out using chemical heat, electric furnace is to make steel scrap dephosphorization using arc heat, it is necessary to is contained
Foam-like clinker can be formed, to protect furnace lining with the C of oxygen reaction by having；CaF2The fusing point drop of the desulfurizing agent, Dephosphorising agent can be made
It is low, help to lift desulfurization and dephosphorization efficiency.Other components still alternatively include sulfur-containing compound (such as, but not limited to sulphur
Change calcium) and trace element etc..
It is preferred that using the gross weight of the thermal reduction slag as 100wt%, the calcium oxide content scope is 20~65wt%, the oxygen
SiClx content range is 5~30wt% and the other components content range is 14~65wt%.CaO content is with taking off with desulfurization
Phosphorus effect is related, is to provide the main composition of desulfurization and dephosphorization effect.Lime block and calcium oxide in the steel-making inorganic agent
Total content it is higher, desulfurization is better with dephosphorization effect, but fusing point is also relative improves.More preferably, the thermal reduction cinder ladle containing 30~
65wt% calcium oxide.
It is preferred that using the thermal reduction slag gross weight as 100 listed as parts by weight, the lime block content range is 5~50 parts by weight.
More preferably, the lime block content range is 5~25 parts by weight；Again more preferably, the lime block content range is 5~15 parts by weight.
It is preferred that the particle size range of the lime block is 20 to 80mm.When particle diameter is less than 20mm, lime block may be set by dust
Standby suction；When particle diameter is more than 80mm, then it may cause difficulty of transportation and make melting time lengthening.
It is preferred that the steel-making is to be used for desulfurization or dephosphorization with inorganic agent.
It is preferred that the temperature range that the steel-making inorganic agent is applicable is 1350 DEG C to 1680 DEG C, should in this temperature range
Steel-making inorganic agent can be completely dissolved, and helped to shorten smelting time, reduced cost and the energy resource consumption of steelmaking process.
Method for making steel of the present invention comprises the steps of：(S1) foregoing steel-making is added in sulfur-bearing molten steel with inorganic agent and carries out one
Secondary desulfurization process.
The composition and changes of contents of the steel-making inorganic agent of the step (S1) are identical with foregoing steel-making inorganic agent, will not
Repeat again.
It is preferred that the thermal reduction slag of the step (S1) is to be handled to be generated through once desulfurization by sulfur-bearing molten steel, and the step
Suddenly (S1) is ultimately produced through single treatment molten steel and second heat reducing slag.Specifically, the step (S1) is to enter sulfur-bearing molten steel
The generated thermal reduction slag of row once desulfurization processing mixed immediately with lime block or lime block with the combination of adjustment component and
Steel-making inorganic agent is obtained, the steel-making is added in sulfur-bearing molten steel with inorganic agent immediately again carry out desulfurization process afterwards.It is or optional
Ground is selected, the thermal reduction slag is together to add in sulfur-bearing molten steel to carry out immediately with the combination of lime block or lime block with adjusting component
Desulfurization process.
Above-mentioned step (S1) can be repeated, until sulfur-bearing molten steel is changed into low-sulfur molten steel.
It is preferred that the method for making steel is also contained in the step (P1) after the step (S1), be after the completion of step (S1), with
Dephosphorization treatment will be carried out in the phosphorous molten steel of second heat reducing slag addition.Selectively, the step (P1) be by second heat also
Former slag with adjustment component be mixed and added into phosphorous molten steel with lime block or lime block carries out dephosphorization treatment.Or it may be selected
Ground, the step (P1) are together to add in phosphorous molten steel with adjustment component by second heat reducing slag and lime block or lime block
Row dephosphorization treatment.
It is preferred that the method for making steel is also contained in the step (CS1) after the step (S1), it is by step (S1) second heat
Reducing slag is carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in sulfur-bearing molten steel and carries out once desulfurization processing and generates
Warm sludge.The cold clinker also selectively first with adjustment component mix and added in sulfur-bearing molten steel with lime block or lime block；
Or selectively together added in sulfur-bearing molten steel with adjustment component with lime block or lime block.
It is preferred that the method for making steel also include the step (CS1) after step (CS1P), be after the completion of step (CS1),
With will the warm sludge add in phosphorous molten steel and carry out dephosphorization treatment.The warm sludge also selectively first with lime block or lime block with
Adjustment component carries out mixing and added in phosphorous molten steel；Or selectively with lime block or lime block with adjusting component together
Add in phosphorous molten steel.
It is preferred that the method for making steel also includes step (S2), it is to add the second heat reducing slag in sulfur-bearing molten steel to carry out
Once desulfurization handles and generates and heat-treat slag three times.The second heat reducing slag also selectively first with lime block or lime block with
Adjustment component carries out mixing and added in sulfur-bearing molten steel；Or selectively with lime block or lime block with adjusting component together
Add in sulfur-bearing molten steel.It is preferred that what the use weight of the second heat reducing slag in the step (S2) was generated by step (S1)
The 30%~100% of second heat reducing slag.
It is preferred that the method for making steel also includes the step (P2) after the step (S2), it is after the completion of step (S2), immediately
This is heat-treated three times in the phosphorous molten steel of slag addition and carry out dephosphorization treatment.This heat-treats slag also selectively elder generation and lime three times
Block or lime block, which with adjustment component mix, to be added in phosphorous molten steel；Or selectively with lime block or lime block with
Adjustment component is together added in phosphorous molten steel.
It is preferred that the method for making steel also includes step (S3), it is to heat-treat this three times to carry out in slag addition sulfur-bearing molten steel
Once desulfurization handles and generates four thermal reduction slags.This heat-treat three times slag also selectively first with lime block or lime block with
Adjustment component carries out mixing and added in sulfur-bearing molten steel；Or selectively with lime block or lime block with adjusting component together
Add in sulfur-bearing molten steel.
It is preferred that the method for making steel also includes the step (P3) after the step (S3), it is after the completion of step (S3), immediately
This four times thermal reduction slags are added in phosphorous molten steel and carry out dephosphorization treatment.This four times thermal reduction slags also selectively elder generation and lime
Block or lime block, which with adjustment component mix, to be added in phosphorous molten steel；Or selectively with lime block or lime block with
Adjustment component is together added in phosphorous molten steel.
It is preferred that the method for making steel also includes step (CP1), it is to enter the second heat reducing slag that the step (S1) is generated
Row cooling agglomeration generates cold clinker, then the cold clinker is added in phosphorous molten steel and carries out dephosphorization treatment.The cold clinker also may be selected
Ground is added in the phosphorous molten steel after being mixed with the combination of lime block or lime block with adjusting component.
It is preferred that the method for making steel also includes step (CP2), it is to enter the slag of thermal reduction three times that the step (S2) is generated
Row cooling agglomeration generates cold clinker, then the cold clinker is added in phosphorous molten steel and carries out dephosphorization treatment.The cold clinker also may be selected
Ground is added in the phosphorous molten steel after being mixed with the combination of lime block or lime block with adjusting component.
It is preferred that the method for making steel also includes step (CP3), it is that four thermal reduction slags for being generated the step (S3) enter
Row cooling agglomeration generates cold clinker, then the cold clinker is added in phosphorous molten steel and carries out dephosphorization treatment.The cold clinker also may be selected
Ground is added in the phosphorous molten steel after being mixed with the combination of lime block or lime block with adjusting component.
It is preferred that the method for making steel also includes step (CS2), it is that the slag of thermal reduction three times of step (S2) is carried out into cooling to make
Block generates cold clinker, then the cold clinker is added in sulfur-bearing molten steel and carries out once desulfurization processing and generates warm sludge.Again it is preferred that should
Method for making steel also includes step (CS2P), be after the completion of step (CS2), with will the warm sludge add in phosphorous molten steel and be taken off
Phosphorus processing.
It is preferred that method for making steel also includes step (CS3), it is that four thermal reduction slags of step (S3) are subjected to cooling agglomeration
Cold clinker is generated, then the cold clinker is added in sulfur-bearing molten steel and carries out once desulfurization processing and generates warm sludge.Again it is preferred that the refining
Steel method also includes step (CS3P), be after the completion of step (CS3), with will the warm sludge add in phosphorous molten steel and carry out dephosphorization
Processing.
The method for making steel can only include dephosphorization technology, that is, step (P0)：Above-mentioned steel-making is phosphorous with inorganic agent addition
A dephosphorization treatment is carried out in molten steel.
Sulfur-bearing molten steel used in above-mentioned steps (S1), (S2), (S3), (CS1), (CS2) and (CS3) is selectively put
It is placed in same reduction furnace, or is respectively placed in different reduction furnaces.It is preferred that above-mentioned steps (S1), (S2), (S3),
(CS1), (CS2) and (CS3) can be carried out once or repeated repeatedly respectively.
It is preferred that above-mentioned steps (P0), (P1), (P2), (P3), (CS1P), (CS2P) and (CS3P) can carry out one respectively
It is secondary or repeat repeatedly.Used in above-mentioned steps (P0), (P1), (P2), (P3), (CS1P), (CS2P) and (CS3P)
Phosphorous molten steel is optionally placed in same oxidation furnace, or is respectively placed in different oxidation furnaces.
The thermal reduction slag that the dephosphorization treatment of step (P1), (P2), (P3), (CS1P), (CS2P) and (CS3P) is added
Weight can be respectively the 20-70% that step (S1), (S2), (S3), (CS1), (CS2) and (CS3) generates thermal reduction slag.
In summary illustrate, the concrete example of method for making steel of the present invention is including but not limited to following aspect：
(aspect 1) method for making steel is sulfur removal technology, is included step (S1)；
(aspect 2) method for making steel is desulfurization dephosphorization technique, includes step (S1) and step (P1)；
(aspect 3) method for making steel is sulfur removal technology, includes step (S1) and step (CS1)；
(aspect 4) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (CS1) and step (CS1P)；
(aspect 5) method for making steel is sulfur removal technology, includes step (S1) and step (S2)；
(aspect 6) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (S2) and step (P2)；
(aspect 7) method for making steel is sulfur removal technology, includes step (S1), step (S2) and step (S3)；
(aspect 8) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (S2), step (S3) and step
(P3)；
(aspect 9) method for making steel is desulfurization dephosphorization technique, includes step (S1) and step (CP1)；
(aspect 10) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (S2) and step (CP2)；
(aspect 11) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (S2), step (S3) and step
(CP3)；
(aspect 12) method for making steel is sulfur removal technology, includes step (S1), step (S2) and step (CS2)；
(aspect 13) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (S2), step (CS2) and step
(CS2P)；
(aspect 14) method for making steel is sulfur removal technology, includes step (S1), step (S2), step (S3) and step (CS3)；
(aspect 15) method for making steel is desulfurization dephosphorization technique, includes step (S1), step (S2), step (S3), step
And step (CS3P) (CS3)；And
(aspect 16) method for making steel is dephosphorization technology, is included step (P0).
It is preferred that wherein, the temperature range of the desulfurization process or dephosphorization treatment is 1350 to 1680 DEG C；More preferably it is 1450
To 1650 DEG C.
It is preferred that in the desulfurization process, the partial pressure of oxygen at the sulfur-bearing molten steel liquid level is less than 200ppm.
It is preferred that in the dephosphorization treatment, the partial pressure of oxygen at the phosphorous molten steel liquid level is more than 100ppm.
It is preferred that sulfur-bearing molten steel sulfur content after the desulfurization process is less than 0.03wt%.
It is preferred that the phosphorous molten steel, after the dephosphorization treatment, phosphorus content is less than 0.03wt%.
It is preferred that when the steel-making is by the use of inorganic agent as Dephosphorising agent in use, selectively arranging in pairs or groups a carbonaceous additive together
Use.During dephosphorization treatment, the carbonaceous additive can form foam-like clinker with oxygen reaction, have and reduce furnace lining abrasion
The effect of.
It is preferred that the reaction time of the desulfurization or dephosphorization treatment is 30 to 50 minutes.Less than 30 minutes between when reacted, take off
Reaction of Salmon-Saxl or dephosphorisation reaction be not complete；More than 50 minutes between when reacted, desulphurization reaction or dephosphorisation reaction completed and desulfurization or
Dephosphorization effect is no longer lifted, and causes the waste of time and the energy.
Brief description of the drawings
The other features and effect of the present invention, will clearly be presented in the embodiment with reference to schema, wherein：
Fig. 1 is a histogram, illustrates preparation example, the test result of embodiment 1~4 of method for making steel of the present invention.
Embodiment
The present invention will be described further with regard to following examples, however, it should be noted that the embodiment is only to illustrate
Purposes, and be not necessarily to be construed as the limitation implemented of the present invention.
[preparation example] heat-treats the making of slag 1
60ton steel scrap is put into reduction furnace, adds desulfurizing agent, composition and ratio such as following table.Control the reduction furnace
In-furnace temperature is 1650 DEG C, and the partial pressure of oxygen on molten steel surface is 100ppm, and to be desulfurization dose with after molten steel melting 40 minutes, obtaining
780Kg thermal reduction slag 1 and the molten steel through desulfurization process.Finally, the molten steel after desulfurization process is sampled, with spark light
Spectrometer (spark spectrum) tests the sulfur content of the molten steel, as a result as shown in Figure 1.
A. calculated by 100wt% of desulfurizing agent gross weight.
<Desulfurization is tested>
[embodiment 1]
Step (S1)：By caused thermal reduction slag 1, lime block and adjustment component in preparation example, (composition and dosage are as follows
Table) carry out quick mixing acquisition steel-making inorganic agent；Then, then steel-making is all poured into inorganic agent and is placed with sulfur-bearing molten steel
Desulfurization process is carried out in reduction furnace.The in-furnace temperature for controlling the reduction furnace is 1650 DEG C, and the partial pressure of oxygen on molten steel surface is 100ppm,
After steel-making inorganic agent with after molten steel melting 40 minutes, obtaining through single treatment molten steel and 1250Kg second heats reducing slag 2.To this
It is sampled through single treatment molten steel, the sulfur content of the molten steel is tested with spark spectrum instrument, as a result as shown in Figure 1.
B. to heat-treat the gross weight of slag 1 as 100 listed as parts by weight.
Embodiment 1 carries out the sulfur removal technology of sulfur-bearing molten steel using the steel-making containing 780Kg thermal reduction slags 1 with inorganic agent, can
Obtain 1250Kg second heat reducing slag 2.And the sulfur removal technology of sulfur-bearing molten steel is typically carried out using the desulfurizing agent such as preparation example, will
1560Kg reducing slag can be obtained.Compared to general sulfur removal technology, the method for embodiment 1 can reduce the output of reducing slag (drop
Low 310Kg), and the reducing slag of institute's output can also be repeated with desulfurization processed or dephosphorization technology.
[embodiment 2]
Step (S2)：By caused second heat reducing slag 2, lime block and adjustment component (composition and dosage in embodiment 1
Such as following table) carry out quick mixing acquisition steel-making inorganic agent；Then, then by steel-making with inorganic agent all pour into and be placed with sulfur-bearing and melt
Desulfurization process is carried out in the reduction furnace of steel.The in-furnace temperature for controlling the reduction furnace is 1650 DEG C, and the partial pressure of oxygen on molten steel surface is
100ppm, after steel-making inorganic agent with after molten steel melting 40 minutes, obtaining the heat three times through single treatment molten steel and 1550Kg also
Former slag 3.This is sampled through single treatment molten steel, the sulfur content of the molten steel is tested with spark spectrum instrument, as a result such as Fig. 1 institutes
Show.
B. using the gross weight of second heat reducing slag 2 as 100 listed as parts by weight.
Embodiment 2 carries out the desulfurization work of sulfur-bearing molten steel using the steel-making containing 1250Kg second heats reducing slag 2 with inorganic agent
Skill, the 1550Kg slag of thermal reduction three times 3 can be obtained.And the desulfurization work of sulfur-bearing molten steel is typically carried out using the desulfurizing agent such as preparation example
Skill, it will obtain 2340Kg reducing slag.Compared to general sulfur removal technology, the method for embodiment 2 can reduce the production of reducing slag
Go out and (reduce 790Kg), and the reducing slag of institute's output can also be repeated with desulfurization processed or dephosphorization technology.
＜ dephosphorizations test ＞
[embodiment 3]
Step (P2)：Slag 3, lime block and adjustment component (composition and dosage are heat-treated three times by caused in embodiment 2
Such as following table) carry out quick mixing acquisition steel-making inorganic agent；Then,
Again steel-making is all poured into be placed with the oxidation furnace of phosphorous molten steel with inorganic agent and carry out dephosphorization treatment.Control the oxygen
The in-furnace temperature for changing stove is 1550 DEG C, and the partial pressure of oxygen on molten steel surface is 200ppm, treats that steel-making inorganic agent divides with molten steel melting 20
Zhong Hou, obtain through a dephosphorization treatment molten steel.This is sampled through a dephosphorization treatment molten steel, should with the test of spark spectrum instrument
The phosphorus content of molten steel, as a result as shown in Figure 1.
B. to heat-treat the gross weight of slag 3 three times as 100 listed as parts by weight.
[embodiment 4]
Step (P2)：Slag 3, lime block and adjustment component (composition and dosage are heat-treated three times by caused in embodiment 2
Such as following table) carry out quick mixing acquisition steel-making inorganic agent；Then, then by steel-making with inorganic agent all pour into and be placed with phosphorous melt
Dephosphorization treatment is carried out in the oxidation furnace of steel.The in-furnace temperature for controlling the oxidation furnace is 1550 DEG C, and the partial pressure of oxygen on molten steel surface is
200ppm, after steel-making inorganic agent with after molten steel melting 40 minutes, obtaining through a dephosphorization treatment molten steel.To this through a dephosphorization
Processing molten steel is sampled, and the phosphorus content of the molten steel is tested with spark spectrum instrument, as a result as shown in Figure 1.
B. to heat-treat the gross weight of slag 3 three times as 100 listed as parts by weight.
By Fig. 1 result, it was demonstrated that using containing thermal reduction slag steel-making inorganic agent of the present invention really can effectively desulfurization or
Dephosphorization.
In summary, steel-making inorganic agent of the present invention is substituted in existing desulfurizing agent, Dephosphorising agent by using thermal reduction slag
Part lime block, desulfurizing agent, the lime block dosage of Dephosphorising agent are reduced, and a kind of steel-making side of recycling electroslag is provided
Method, makes desulfurizing agent, the cost of Dephosphorising agent is greatly reduced and mitigates environmental pressure, and desulfurized effect is good.
As described above, only presently preferred embodiments of the present invention, when the scope that the present invention can not be limited with this implement,
I.e. all simple equivalent changes and modificationss made according to claims of the present invention and description, all still belong to the model of the present invention
Enclose.
Claims (27)
- A kind of 1. steel-making inorganic agent, it is characterised in that：Its include lime block and thermal reduction slag, wherein, the thermal reduction slag be by Desulfurization process of the sulfur-bearing molten steel through once or more is generated；And using the thermal reduction slag gross weight as 100 parts by weight, the lime Block content range is 1~85 parts by weight.
- 2. steel-making inorganic agent as claimed in claim 1, it is characterised in that：The steel-making inorganic agent is also comprising adjustment component.
- 3. steel-making inorganic agent as claimed in claim 2, it is characterised in that：The adjustment component be selected from aluminium, magnesium, manganese, silicon, Carbon, iron, zinc, calcirm-fluoride, calcium oxide, magnesia, iron oxide, iron containing alloy, aluminum oxide, silica or foregoing combination.
- 4. steel-making inorganic agent as claimed in claim 1, it is characterised in that：The thermal reduction cinder ladle containing calcium oxide, silica and Other components, the other components include at least one material, and the material is selected from aluminum oxide, magnesia, manganese oxide, carbon, oxygen Change iron, zinc, calcirm-fluoride or foregoing combination.
- 5. steel-making inorganic agent as claimed in claim 4, it is characterised in that：, should using the gross weight of the thermal reduction slag as 100wt% Calcium oxide content scope is 20~65wt%, and the silica content scope is 5~30wt% and the other components content range is 14~65wt%.
- 6. steel-making inorganic agent as claimed in claim 1, it is characterised in that：The steel-making inorganic agent is to be used for desulfurization or dephosphorization.
- A kind of 7. method for making steel, it is characterised in that：It is comprised the steps of：(S1) a kind of steel-making as described in any one of claim 1 to 6 claim is added in sulfur-bearing molten steel with inorganic agent Carry out once desulfurization processing.
- 8. method for making steel as claimed in claim 7, it is characterised in that：The thermal reduction slag is through once desulfurization by sulfur-bearing molten steel Reason is generated, and the step (S1) is ultimately produced through single treatment molten steel and second heat reducing slag.
- 9. method for making steel as claimed in claim 8, it is characterised in that：The method for making steel also includes step (P1), is in step (S1) after the completion of, with will the second heat reducing slag add in phosphorous molten steel and carry out dephosphorization treatment.
- 10. method for making steel as claimed in claim 9, it is characterised in that：In the step (P1), the second heat reducing slag be with The combination of lime block or lime block with adjusting component is added in the phosphorous molten steel after being mixed.
- 11. method for making steel as claimed in claim 8, it is characterised in that：The method for making steel also includes step (CS1), is by step Suddenly the second heat reducing slag of (S1) is carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in sulfur-bearing molten steel and carried out once Desulfurization process and generate warm sludge.
- 12. method for making steel as claimed in claim 11, it is characterised in that：The method for making steel also includes step (CS1P), be After the completion of step (CS1), with will the warm sludge add in phosphorous molten steel and carry out dephosphorization treatment.
- 13. method for making steel as claimed in claim 8, it is characterised in that：The method for making steel also includes step (S2), be by this two Secondary thermal reduction slag, which is added in sulfur-bearing molten steel, to carry out once desulfurization processing and generates and heat-treat slag three times.
- 14. method for making steel as claimed in claim 13, it is characterised in that：The method for making steel also includes step (P2), is in step Suddenly after the completion of (S2), with will this heat-treat slag three times and add in phosphorous molten steel and carry out dephosphorization treatment.
- 15. method for making steel as claimed in claim 13, it is characterised in that：The method for making steel also includes step (S3), is by this Slag is heat-treated three times to add progress once desulfurization processing in sulfur-bearing molten steel and generate four thermal reduction slags.
- 16. method for making steel as claimed in claim 15, it is characterised in that：The method for making steel also includes step (P3), is in step Suddenly after the completion of (S3), dephosphorization treatment is carried out with that will heat-treat for this four times in the phosphorous molten steel of slag addition.
- 17. method for making steel as claimed in claim 8, it is characterised in that：The method for making steel also includes step (CP1), is by this The second heat reducing slag that step (S1) is generated is carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in phosphorous molten steel Carry out dephosphorization treatment.
- 18. method for making steel as claimed in claim 17, it is characterised in that：In the step (CP1), the cold clinker is and lime The combination of block or lime block with adjusting component is added in the phosphorous molten steel after being mixed.
- 19. method for making steel as claimed in claim 13, it is characterised in that：The method for making steel also includes step (CP2), is by this The slag of thermal reduction three times that step (S2) is generated is carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in phosphorous molten steel Carry out dephosphorization treatment.
- 20. method for making steel as claimed in claim 19, it is characterised in that：In the step (CP2), the cold clinker is and lime The combination of block or lime block with adjusting component is added in the phosphorous molten steel after being mixed.
- 21. method for making steel as claimed in claim 15, it is characterised in that：The method for making steel also includes step (CP3), is by this Four thermal reduction slags that step (S3) is generated are carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in phosphorous molten steel Carry out dephosphorization treatment.
- 22. method for making steel as claimed in claim 21, it is characterised in that：In the step (CP3), the cold clinker is and lime The combination of block or lime block with adjusting component is added in the phosphorous molten steel after being mixed.
- 23. method for making steel as claimed in claim 13, it is characterised in that：The method for making steel also includes step (CS2), is by step Suddenly the slag of thermal reduction three times of (S2) is carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in sulfur-bearing molten steel and carried out once Desulfurization process and generate warm sludge.
- 24. method for making steel as claimed in claim 23, it is characterised in that：The method for making steel also includes step (CS2P), be After the completion of step (CS2), with will the warm sludge add in phosphorous molten steel and carry out dephosphorization treatment.
- 25. method for making steel as claimed in claim 15, it is characterised in that：The method for making steel also includes step (CS3), is by step Suddenly four thermal reduction slags of (S3) are carried out cooling down the cold clinker of agglomeration generation, then the cold clinker is added in sulfur-bearing molten steel and carried out once Desulfurization process and generate warm sludge.
- 26. method for making steel as claimed in claim 25, it is characterised in that：The method for making steel also includes step (CS3P), be After the completion of step (CS3), with will the warm sludge add in phosphorous molten steel and carry out dephosphorization treatment.
- A kind of 27. method for making steel, it is characterised in that：The method for making steel comprises the steps of：(P0) a kind of steel-making as described in any one of claim 1 to 6 claim is added in phosphorous molten steel with inorganic agent Carry out a dephosphorization treatment.
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| TW105119862 | 2016-06-24 | ||
| TW105119862 | 2016-06-24 | ||
| TW105133187A TWI674321B (en) | 2016-06-24 | 2016-10-14 | Steelmaking treatment agent and steelmaking method |
| TW105133187 | 2016-10-14 |
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