CN103443297B - The method of zinc and the manufacture method of zinc interpolation steel is added in molten steel - Google Patents
The method of zinc and the manufacture method of zinc interpolation steel is added in molten steel Download PDFInfo
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- CN103443297B CN103443297B CN201180069426.7A CN201180069426A CN103443297B CN 103443297 B CN103443297 B CN 103443297B CN 201180069426 A CN201180069426 A CN 201180069426A CN 103443297 B CN103443297 B CN 103443297B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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Abstract
The invention provides a kind of can yield rate well and in molten steel, add the method for zinc easily.Be a kind of method of adding zinc in molten steel, wherein, the composite oxides of Zn and Al and/or Si put in molten steel.And, be a kind of method of adding zinc in molten steel, wherein, the oxide compound of Ca put in aforementioned molten steel.Molten steel is preferably the molten steel of hot working tool steel.And, be the manufacture method that zinc adds steel, wherein, the molten steel that the method for adding zinc by these in molten steel is added with zinc cast.The content that zinc after casting adds the Zn comprised in steel is preferably more than 0.001 quality %.
Description
Technical field
The present invention relates to the method for adding zinc in the melting process of steel in molten steel, and utilize its zinc to add the manufacture method of steel.
Background technology
In the past, the zinc from the steel that waste material etc. is mixed into, was regarded as the element of the mechanical characteristics deterioration making steel work as impurity, therefore expected to remove extremely low amount.On the other hand, the applicant has confirmed to add a certain amount of zinc, such as, the toughness of hot working tool steel can be made to improve, and therefore proposes its method (with reference to patent documentation 1).The method of patent documentation 1 can realize the raising of the toughness of hot working tool steel by being utilized as alloying element by Zn.
But zinc is in a ratio of fusing point, the low-down volatile element of boiling point with steel (iron).Therefore, in the melting process of steel, when merely adding in molten steel with the state of metallic zinc, after it adds, namely there is many being evaporated at once, escape to outside, relative to the finished product rate variance of target addition.So, the method of zinc is added about Xiang Gangzhong, propose prepare in advance across paper, the material of this kind of thermal insulation material of plastics with molten metal identical component is by material coated for metallic zinc and put in molten metal by this material, can suppress the method (with reference to patent documentation 2) of the reduction of the yield rate caused by the evaporation of zinc thus.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2007-224418 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2-61006 publication
Summary of the invention
the problem that invention will solve
The method of patent documentation 2 can make metallic zinc arrival to the deep of molten metal, and the yield rate raising for Zinc supplementation has certain effect.But the zinc added self is still the state of metal simple-substance, and therefore zinc fuses in molten metal on the one hand, and the steam output of zinc is also more on the other hand.In addition, the coated operation of metallic zinc is numerous and diverse, therefore also there is the factor that cost increases.Thus, requirement can reach the method that yield rate improves more more easily.
The object of the invention is to, provide can yield rate better and easily zinc is added to the method in molten steel and utilize its zinc to add the manufacture method of steel.
for the scheme of dealing with problems
The major cause that the zinc added in molten steel evaporates immediately is because it added with the state of metal simple-substance.Therefore, the present inventor etc. are studied the technology of adding zinc with compound state.Its result, has found to be suitable for realizing high form of adding the zn cpds of yield rate and low interpolation cost simultaneously, thus has completed the present invention.
That is, the present invention is a kind of method of adding zinc in molten steel, it is characterized in that, is put in molten steel by the composite oxides of Zn and Al and/or Si.And the present invention is a kind of method of adding zinc in molten steel, it is characterized in that, is put in aforementioned molten steel by the oxide compound of Ca.Molten steel is preferably the molten steel of hot working tool steel.
And the present invention is the manufacture method that a kind of zinc adds steel, it is characterized in that, is cast the molten steel being added with zinc by above-mentioned method of adding zinc in molten steel.The content that zinc after casting adds the Zn comprised in steel is preferably more than 0.001 quality %.
the effect of invention
According to addition means of the present invention, can yield rate well and make at low cost in steel containing such as more than 0.001 quality % and then the zinc reaching 0.01 quality %.And the zinc that can manufacture the zinc containing above-mentioned amount adds steel.Therefore, becoming except the hot working tool steel except manufacturing patent documentation 1, manufacturing technology also useful in the high steel of Zn content.
Embodiment
About in method of the present invention, when adding zinc the compound etc. that uses, be described in detail below.It should be noted that, method of the present invention is not limited to the method recorded in following explanation and embodiment.
(1) compound put in molten steel is the composite oxides of Zn and Al and/or Si.
The temperature of molten steel even reaches 1600 DEG C.And, from zinc is put into after molten steel to casting terminate during, the reason that the evaporation of zinc is carried out fast is, the lower boiling (high-vapor-pressure) of about 900 DEG C that this metallic zinc itself has.Therefore, as long as by metallic zinc making case as 1600 DEG C, be also difficult under the environment of atmosphere opening decompose (vapour pressure of Zn composition is lower) zn cpds form after put in molten steel, zinc composition in compound would not evaporate immediately, and it can be made to stay in molten steel.
Present inventor people etc. are studied the zn cpds that can meet above-mentioned condition.It found that, simple Zn oxide compound easily decomposes under the high temperature of 1600 DEG C, if but be the composite oxides of Zn and Al, the composite oxides of Zn and Si, then be also not easy at such high temperatures to decompose.And these zn cpdss can be reduced by Si, Mn, Al and Mg of usually comprising in molten steel, Ca.Therefore, if the zinc composition that should add is put in molten steel with the state of the composite oxides of Zn and Al and/or Si chemical combination, zinc composition would not evaporate immediately, and in molten steel, carry out reduction reaction, and its result becomes can add to a large amount of metallic zinc in molten steel.
As zn cpds of the present invention, ZnO and Al can be used
2o
3composite oxides and Zinc aluminate, ZnO and SiO
2composite oxides and zinc silicate.Wherein, the fusing point of zinc silicate is lower than Zinc aluminate, and decomposing (reduction reaction) can carry out than more quickly, therefore can be added in molten steel by the Zn of specified amount within a short period of time.But, corresponding to the degree that above-mentioned decomposition is carried out fast, the Zn generating gasification after decomposition and the time required till starting to spill from molten steel also short than the situation of Zinc aluminate.In actually operating, the molten steel after composition adjustment terminates just was cast without 1 hour usually thus.And, if at the last input zinc silicate of composition adjustment, then, before spilling the molten steel started after this input at a large amount of Zn, can casting manipulations be terminated.Therefore, zinc silicate is used to be preferred in the yield rate improving zinc.On the other hand, the situation of the Zinc aluminate that above-mentioned reduction reaction is more slowly carried out, can suppress just putting into after in molten steel, make Zn evaporate the fierceness caused smolder because zn cpds sharply decomposes.In actually operating, Zinc aluminate is used to be preferred in fume extractor such as simplifying.
When putting into the zn cpds in molten steel and using the composite oxides two kinds of the composite oxides of Zn and Al and Zn and Si, except can dropping into respective composite oxides, also can drop into Zn and Al and the form of the composite oxides of the common chemical combination of Si.And zn cpds of the present invention, except can directly put into except in molten steel, not producing in the scope of baneful influence to the various characteristics of steel, also can drop into after the parcels such as metal.When directly being dropped into by zn cpds, cover the state of molten steel surface in zn cpds.In addition, input guiding piece etc. also can be used to put into the deep of molten steel.When dropping into zn cpds, the surface of molten steel also can be covered before or after the event with slag at it.Thus, can prevent the surface of molten steel from contacting with extraneous gas, delay the evaporation of the Zn after decomposing.For the formation of slag, comprising its composition can utilize usual method, also can be suitable for aftermentioned preferred method in addition.
(2) preferably, the oxide compound of Ca is put in molten steel.
Even if a large amount of metallic zinc can be added in molten steel by aforesaid method, if but through the long period from interpolation, then the zinc in molten steel can evaporate gradually from the surface of molten steel.Therefore, preferably, further the oxide compound of Ca is put in molten steel.The oxide compound of Ca is generally the slag former of Steel Refining.And in the present case, the slag produced by the oxide compound of this Ca covers the surface of molten steel, prevents the surface of molten steel from contacting with extraneous gas.Thus, though the metallic zinc in molten steel from it adds through the long period, also can the carrying out of retard evaporation.For the period of dropping into, during till the Zn after interpolation fully stops in molten steel, drop into the front and back of zn cpds.Also can by mixing with zn cpds and/or chemical combination and dropping into it simultaneously.Mix with zn cpds and/or chemical combination drops into when, the input amount of the oxide compound of Ca is preferably 10 ~ 50 quality % with the entirety of zn cpds summation.When this input amount is too much, the fusing point of zn cpds during input declines, and the decomposition of zn cpds is carried out fast, accompanies therewith, and the evaporation of the Zn after decomposition also accelerates period.Improve the fluorochemical (CaF of the Ca of slag mobility
2) part for the oxide compound of Ca can be replaced and drop into further.
(3) preferably, molten steel is the molten steel of hot working tool steel.
When melting process method of the present invention being applicable to hot working tool steel is to add Zn, the toughness (with reference to patent documentation 1) of hot working tool steel can be improved.Therefore, zinc addition means of the present invention is applicable to adding zinc in the molten steel of hot working tool steel.And, further preferably, be added with the Zn of molten steel containing more than 0.001 quality % after its casting of the hot working tool steel of zinc.One-tenth for hot working tool steel is grouped into, except patent documentation 1, and the standard steel grade that can also add JIS etc. as required, the Element Species in the past proposed.
Embodiment 1
Prepare the hot working tool steel SKD61 of JIS standard, and zinc addition means of the present invention is implemented to it.The chemical composition of prepared SKD61 is shown in table 1(and does not add Ni, W, Zn, Nb, Co).
[table 1]
(quality %)
| C | Si | Mn | P | S | Ni | Cr |
| 0.88 | 0.98 | 0.41 | 0.010 | 0.0007 | 0.05 | 5.11 |
| Mo | W | V | Zn | Nb | Co | Fe ※ |
| 1.21 | ＜0.01 | 0.83 | ＜0.001 | ＜0.01 | ＜0.01 | Surplus |
※ comprises impurity
The steel of 50g table 1 is joined in MgO compact substance crucible, melt with resistance furnace.Then, by set the yield rate of Zn composition as 100% time molten steel in Zn content be computationally that the input amount of 1.0 quality % is (hereinafter simply referred to as " calculated amount ".) zn cpds (or metallic zinc), directly put into the surface of the molten steel maintaining 1600 DEG C according to following main points, keep the specified time in an ar atmosphere.Then, the molten steel after keeping is carried out water-cooled together with crucible, is cooled to room temperature, analyze the Zn content in the steel after solidifying, evaluate the yield rate of zinc thus.The emmission spectrometric analysis employing spark discharge is utilized to carry out Zn containing quantitative analysis.
［ example 1 of the present invention ］
Drop into Zinc aluminate powder and (be designated as ZnOAl
2o
3.Stoichiometrically form meter, ZnO:44.4 quality %, Al
2o
3: 55.6 quality %).
［ example 2 of the present invention ］
Be dropped in the mixture (ZnOAl of mixed C aO powder in the Zinc aluminate powder of example 1 of the present invention
2o
3: 90 quality %, CaO:10 quality %).
［ comparative example 1 ］
Drop into Metal Zn.
［ comparative example 2 ］
Drop into ZnO powder.
Zn content in steel is shown in table 2.For the comparative example 1 directly having dropped into Metal Zn, Zn generating gasification immediately after it drops into, from input, maintenance is after 30 minutes, substantially all volatilizees, finished product rate variance.Zn employs the comparative example 2 of ZnO compared with comparative example 1 in adding, although the yield rate of Zn is improved, from after just dropping into, the decomposition of ZnO is carried out fast, and the Zn composition after its decomposition evaporates after 30 minutes had passed substantially, finished product rate variance.In contrast, zinc addition means of the present invention and example of the present invention 1 and 2 significantly improve the yield rate of Zn.And can confirm, if the molten steel after casting have passed through the specified time, the zinc that can obtain the Zn containing more than 0.001 quality % adds steel.
It should be noted that, if compare example 1,2 of the present invention, be mixed with the example of the present invention 2 of CaO in zn cpds, the surface of the molten steel after input is covered by slag, but Zn amount in molten steel when have passed through 10 minutes and 30 minutes is lower than the present invention example 1.For the situation of example 2 of the present invention, due to be mixed with in zn cpds CaO and its drop into time the fusing point of zn cpds reduce many, the decomposition of the zn cpds after therefore dropping into is faster than the present invention example 1.And, embodiment 1, molten steel total amount is few under the condition of 50g, can think, in several minutes from dropping into, carry out the decomposition of zn cpds.Therefore, by inference, when several minutes, in the molten steel of example 2 of the present invention, being added with more Zn compared with example 1 of the present invention from input.And, by inference, the Zn in this molten steel due to molten steel amount less, generating gasification when through 10 minutes, even if also start outwards to spill from molten steel under the existence of slag.
[table 2]
Embodiment 2
Prepare Fe-15 quality %Ni steel alloy, and zinc addition means of the present invention is implemented to it.The chemical composition of prepared above-mentioned steel alloy is shown in table 3(and does not add Cr, Mo, W, V, Zn, Nb, Co).
[table 3]
(quality %)
| C | Si | Mn | P | S | Ni | Cr |
| 1.21 | 0.08 | 0.22 | 0.007 | 0.0029 | 15.6 | 0.10 |
| Mo | W | V | Zn | Nb | Co | Fe ※ |
| ＜0.01 | ＜0.01 | ＜0.01 | ＜0.001 | ＜0.01 | ＜0.01 | Surplus |
※ comprises impurity
［ example 3 of the present invention ］
With the steel alloy of furnace melting 25t table 1, tap in casting ladle.Then, the casting ladle that have received steel is transferred to No. 2 refining units.Then, the zn cpds Zn content in molten steel being reached the calculated amount of 0.036 quality % puts into the surface of the molten steel in the casting ladle maintaining 1600 DEG C, keeps the specified time in an ar atmosphere.Input zn cpds is the mixed powder of the Zinc aluminate powder of 90 quality % and the CaO powder of 10 quality % used in example 2 of the present invention, directly drops into.
Then, use the Temporal changes of the sample that obtain and finally sample by the cross gate after being cast by bottom casting method the sample analysis Zn content obtained, thus after evaluation zn cpds input, in molten steel Zn content from casting ladle top cast iron casting mould sampling molten steel of per specified time.The emmission spectrometric analysis employing spark discharge is utilized to carry out Zn containing quantitative analysis.Zn content in steel is shown in table 4.The yield rate of the Zn of zinc addition means of the present invention and example of the present invention 3 is good, when have passed through 80 minutes from input zn cpds, also maintains higher Zn content.In addition, smoldering after less than input zn cpds is substantially confirmed with visual.And, after casting, can obtain containing more than 0.001 quality %, the zinc of the Zn of specified quantitative adds steel.
[table 4]
Embodiment 3
Prepare the hot working tool steel SKD61 of JIS standard, and zinc addition means of the present invention is implemented to it.The chemical composition of prepared SKD61 is shown in table 5(and does not add Ni, W, Zn, Nb, Co).
[table 5]
(quality %)
| C | Si | Mn | P | S | Ni | Cr |
| 0.40 | 1.15 | 0.47 | 0.009 | 0.0030 | 0.03 | 5.14 |
| Mo | W | V | Zn | Nb | Co | Fe ※ |
| 1.28 | ＜0.01 | 0.85 | ＜0.001 | ＜0.01 | ＜0.01 | Surplus |
※ comprises impurity
With the steel of high frequency furnace fusing 25kg table 5.Then, the Zn content in molten steel is reached the zn cpds of the calculated amount of 0.5 quality %, directly drop into the surface of the molten steel maintaining 1600 DEG C according to following main points, keep the specified time in an ar atmosphere.Then, per specified time, from casting ladle top cast iron casting mould sampling molten steel, is analyzed these samplings and Zn content in the sample that obtains, evaluates the yield rate of zinc thus.The emmission spectrometric analysis employing inductively coupled plasma is utilized to carry out Zn containing quantitative analysis.
［ example 4 of the present invention ］
Drop into the Zinc aluminate powder (ZnOAl used in example 1 of the present invention
2o
3).
［ example 5 of the present invention ］
Be dropped in the mixture (ZnOAl of mixed C aO powder in the Zinc aluminate powder of example 1 of the present invention
2o
3: 70 quality %, CaO:30 quality %).
［ example 6 of the present invention ］
Drop into zinc silicate powder and (be designated as 2ZnOSiO
2.Stoichiometrically form meter, ZnO:71.6 quality %, SiO
2: 28.4 quality %).
［ comparative example 3 ］
Drop into ZnO powder.
Zn content in steel is shown in table 6.Also table 6 is charged to the visual Zhuan Condition that smolders confirmed by after input zn cpds.For the comparative example 3 dropping into ZnO, from after just dropping into, the decomposition of ZnO is carried out fast, and the Zn composition after decomposing evaporates rapidly, the finished product rate variance of Zn.And fierceness of smoldering, therefore stops experiment when through 10 minutes.In contrast, for zinc addition means of the present invention and example of the present invention 4 ~ 6, from input zn cpds after 10 minutes, also the decomposition of zn cpds is proceeded, when through 30 minutes, the Zn amount in molten steel increases further, greatly improves the yield rate of Zn.And can confirm, if casting have passed through the molten steel of specified time, the zinc that can obtain the Zn containing more than 0.001 quality % adds steel.
If compare example 4 ~ 6 of the present invention, the example of the present invention 4,5 having dropped into Zinc aluminate more can suppress the reduction reaction after just dropping into, and also substantially confirms less than smoldering through the hold-time.And be mixed with the example of the present invention 5 of CaO in Zinc aluminate, the surface of the molten steel after input is covered by slag, the Zn amount in molten steel when have passed through 10 minutes and 30 minutes is than example more than 4 of the present invention.Dropped into the example of the present invention 6 of zinc silicate compared with example 4,5 of the present invention, the decomposition of zn cpds is rapid, and Zn content when maintaining the specified time is than example 4, more than 5 of the present invention.
[table 6]
Embodiment 4
Prepare Fe-6 quality %Cr steel alloy, and zinc addition means of the present invention is implemented to it.The chemical composition of prepared above-mentioned steel alloy is shown in table 7(and does not add Ni, W, Zn, Nb, Co).
[table 7]
(quality %)
| C | Si | Mn | P | S | Ni | Cr |
| 0.67 | 0.34 | 0.65 | 0.026 | 0.0011 | 0.33 | 5.77 |
| Mo | W | V | Zn | Nb | Co | Fe ※ |
| 0.98 | 0.17 | 0.18 | ＜0.001 | ＜0.01 | 0.05 | Surplus |
※ comprises impurity
［ example 7 of the present invention ］
With the steel alloy of furnace melting 25t table 7, tap in casting ladle.Then, the casting ladle that have received steel is transferred to No. 2 refining units.Then, the zn cpds Zn content in molten steel being reached the calculated amount of 0.036 quality % puts into the surface of the molten steel in the casting ladle maintaining 1600 DEG C, keeps the specified time in an ar atmosphere.Input zn cpds is the mixed powder of the Zinc aluminate powder of 90 quality % and the CaO powder of 10 quality % used in example 2 of the present invention, directly drops into.
Then, use the Temporal changes of the sample that obtain and finally sample by the cross gate after being cast by bottom casting method the sample analysis Zn content obtained, thus after evaluation zn cpds input, in molten steel Zn content from casting ladle top cast iron casting mould sampling molten steel of per specified time.The emmission spectrometric analysis employing inductively coupled plasma is utilized to carry out Zn containing quantitative analysis.Zn content in steel is shown in table 8.The yield rate of the Zn of zinc addition means of the present invention and example of the present invention 7 is good, from input zn cpds through 80 minutes time, also maintains higher Zn content.In addition, smoldering after less than input zn cpds is substantially confirmed with visual.And, after casting, can obtain containing more than 0.001 quality %, the zinc of the Zn of specified quantitative adds steel.
[table 8]
utilizability in industry
The present invention manufactures except the various steel containing zinc except going for, and also goes for adding zinc in such as W metal, Cr or the alloy based on them etc.
Claims (5)
1. in molten steel, add a method for zinc, it is characterized in that, Zinc aluminate and/or zinc silicate are put in molten steel.
2. method of adding zinc in molten steel according to claim 1, is characterized in that, is put in described molten steel by the oxide compound of Ca.
3. method of adding zinc in molten steel according to claim 1 and 2, is characterized in that, molten steel is the molten steel of hot working tool steel.
4. zinc adds a manufacture method for steel, it is characterized in that, is cast the molten steel being added with zinc by the method for adding zinc in molten steel described in any one in claims 1 to 3.
5. zinc according to claim 4 adds the manufacture method of steel, it is characterized in that, the content that the zinc after casting adds Zn contained in steel is more than 0.001 quality %.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-078118 | 2011-03-31 | ||
| JP2011078118 | 2011-03-31 | ||
| PCT/JP2011/079350 WO2012132138A1 (en) | 2011-03-31 | 2011-12-19 | Method for adding zinc to molten steel and process for producing zinc-containing steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103443297A CN103443297A (en) | 2013-12-11 |
| CN103443297B true CN103443297B (en) | 2015-11-25 |
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ID=46929935
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180069426.7A Active CN103443297B (en) | 2011-03-31 | 2011-12-19 | The method of zinc and the manufacture method of zinc interpolation steel is added in molten steel |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2695953B1 (en) |
| JP (1) | JP5761335B2 (en) |
| CN (1) | CN103443297B (en) |
| TW (1) | TWI447232B (en) |
| WO (1) | WO2012132138A1 (en) |
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| CN101397616A (en) * | 2008-06-26 | 2009-04-01 | 肖明 | Method for melting low ignition point non-metal elements and/or low-melting point metal elements with high-melting point metal elements |
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2011
- 2011-12-19 EP EP11862742.1A patent/EP2695953B1/en active Active
- 2011-12-19 JP JP2013507067A patent/JP5761335B2/en active Active
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- 2011-12-19 WO PCT/JP2011/079350 patent/WO2012132138A1/en unknown
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1468921A1 (en) * | 1987-04-14 | 1989-03-30 | Уральский политехнический институт им.С.М.Кирова | Slag-forming composition for casting copper-base alloys |
| CN101790591A (en) * | 2007-08-07 | 2010-07-28 | 陶氏康宁公司 | Method of producing metals and alloys by carbothermal reduction of metal oxides |
| RU2396364C1 (en) * | 2009-04-15 | 2010-08-10 | ООО "Промышленная компания "Вторалюминпродукт" | Flux for reducing, refining, modifying and alloying steel |
Also Published As
| Publication number | Publication date |
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| TW201239104A (en) | 2012-10-01 |
| EP2695953A4 (en) | 2014-10-08 |
| JPWO2012132138A1 (en) | 2014-07-24 |
| TWI447232B (en) | 2014-08-01 |
| JP5761335B2 (en) | 2015-08-12 |
| EP2695953B1 (en) | 2019-08-14 |
| CN103443297A (en) | 2013-12-11 |
| EP2695953A1 (en) | 2014-02-12 |
| WO2012132138A1 (en) | 2012-10-04 |
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