CN110139938A - Inhibit the method for slag bloating - Google Patents
Inhibit the method for slag bloating Download PDFInfo
- Publication number
- CN110139938A CN110139938A CN201780082285.XA CN201780082285A CN110139938A CN 110139938 A CN110139938 A CN 110139938A CN 201780082285 A CN201780082285 A CN 201780082285A CN 110139938 A CN110139938 A CN 110139938A
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- CN
- China
- Prior art keywords
- clinker
- slag
- converter
- deslagging
- deslagging tank
- Prior art date
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Classifications
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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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to: after carrying out molten iron processing in converter, molten slag is discharged in deslagging tank with 3 tons per minute or more of rate from above-mentioned converter, and from above-mentioned discharge, until after the completion of deslagging, from the top of above-mentioned deslagging tank, water is continuously put into 50.0kg~200kg per minute to the position reached in above-mentioned deslagging tank from the molten slag that above-mentioned converter is discharged with 50.0kg~200kg per minute, by partial size for the broken clinker of 5.0mm~30mm.
Description
Technical field
The clinker being discharged in deslagging tank after molten iron processing is especially inhibited to send out in deslagging tank the present invention relates to a kind of
Steep the method for (blistering).
Background technique
In recent years, when refining molten iron to prepare molten steel, using following methods: carrying out dephosphorization of molten iron processing in converter
Afterwards, a part of the clinker formed in converter is discharged in the deslagging tank being arranged in below converter, continues carbonization treatment
Method (multi-function rotating oven process) (referring to patent document 1).In the method, by the CaO/SiO of slag components in converter2Mass ratio
(hereinafter referred to as basicity) is adjusted to 0.8~1.5, by improving the viscosity of clinker, easily cause clinker tempestuously foamed phenomenon (with
It is lower to be known as blistering), the discharge of Lai Gaishan clinker.
In such steel making working procedure, the FeO (iron oxide) in clinker is reacted with the C in molten iron in interface, in clinker
FeO and clinker inside include iron particle in C react, it is possible to create largely small CO bubble, and blistering.
For example, the energy that clinker falls causes the iron in clinker and clinker when clinker is discharged in deslagging tank from converter
It being vigorously stirred between particle and mixes, the C vigorous reaction in the FeO and iron particle in clinker, generates a large amount of small CO
Bubble.As a result, clinker is easy blistering rapidly after being discharged into deslagging tank.In addition, even if calming down blistering temporarily, also it is easy because
Clinker continuously is discharged and continuously blisters.
Therefore, clinker is overflowed from deslagging tank in order to prevent, while keeping such clinker a large amount of in a short time by converter
It is discharged in deslagging tank, needs to inhibit the blistering in deslagging tank or calms down blistering promptly.Therefore, inhibit blistering or flat rapidly
It is indispensable for ceasing and this is made to calm down the lasting technology of state.
It should be noted that clinker is overflowed from deslagging tank in order to prevent when the blistering inhibitory effect deficiency in deslagging tank,
It needs to reduce deslagging rate or reduces bed drain purge.At this moment, can cause following problems: the circulation time of converter extends and reduces production
Property；Phosphatization increases again in carbonization treatment after deslagging；Splash etc. occurs.
It should be noted that by increase deslagging after decarburization blowing in CaO usage amount, can inhibit above-mentioned phosphatization again and
Splash.However, at this moment the production quantity of the highly concentrated clinker of CaO increases, not only from the viewpoint of refining cost, and from slag treatment
From the perspective of, nor preferably.
On the other hand, it is known that it is effective that carbon dust, which calms down material as blistering,.For example, patent document 2 discloses a kind of incite somebody to action
Carbon dust was ejected into the clinker of blistering with 5~100kg/ minutes rates calms down method.Since carbon is difficult to infiltrate clinker, as general
When carbon dust is sprayed into the clinker of blistering, promote the mutual polymerization and floating separation of small CO bubble via carbon dust, to make
Bubble is calmed down.
In addition, patent document 3 discloses and sprays the method for the water of spray form on a kind of slag surface in deslagging tank and make
Method to inhibit slag bloating in deslagging tank (slag pan).By cooling, solidify the surface section of clinker in deslagging tank, can press down
System blistering.
In order to calm down the blistering in deslagging tank, when the method by recording in patent document 2, carbon dust is ejected into clinker
When on surface, since the specific gravity of carbon dust is small and small in size, therefore carbon dust is difficult to invade the inside of clinker.As a result, the effect of carbon dust
Fruit only shows slag surface side, almost without effect in the case where fierceness blistering.In addition, in order to which carbon dust is sprayed into clinker
In, there are following problems: needing to be arranged near deslagging tank the complicated and expensive equipment such as the lifting device of spray gun.
Additionally it is believed that spraying spray form on the slag surface in deslagging tank in the method recorded in patent document 3
Water by cooling, solidifies the surface of clinker in deslagging tank and inhibits to blister.However, in the feelings that clinker is continuously discharged from converter
Under condition, due to clinker whereabouts stream, generation is violent is stirred, and slag surface is continuously updated, and therefore, it is difficult to inhibit
Bubble.
Existing technical literature
Patent document
Patent document 1: No. 2582692 bulletins of Japanese Patent Publication No.
Patent document 2: Japanese Unexamined Patent Publication 4-180507 bulletin
Patent document 3: Japanese Unexamined Patent Publication 8-325619 bulletin
Summary of the invention
Invent the technical issues of solved
The present invention is in view of above-mentioned technical problem, it is desirable to provide one kind can when clinker to be discharged in deslagging tank from converter
The efflux time of clinker is not set to extend and effectively inhibit the suppressing method of the slag bloating of blistering.
Technical means to solve problem
As further investigation as a result, it was found by the inventors of the present invention that will be cheap and readily available by easy equipment
Water and broken clinker put into deslagging tank and inhibit material as blistering, can solve above-mentioned technical problem, and complete this
Invention.The present invention is as described below.
(1) a kind of method for inhibiting slag bloating, wherein after carrying out molten iron processing in converter, by molten slag with every
The rate of 3 tons of minute or more is discharged in deslagging tank from above-mentioned converter, and from above-mentioned discharge, until deslagging is completed
It afterwards, with 50.0kg~200kg per minute, by partial size is the broken clinker of 5.0mm~30mm by water from the top of above-mentioned deslagging tank
The position reached above-mentioned deslagging tank in is continuously put into the molten slag being discharged from above-mentioned converter with 50.0kg~200kg per minute
Near.
(2) inhibit the method for slag bloating according to (1), wherein above-mentioned broken clinker is selected from desiliconization clinker, iron
It is more than at least one of water dephosphorization clinker, converter slag and ladle clinker.
Invention effect
According to the present invention, when clinker to be discharged in deslagging tank from converter, the efflux time of clinker can not be made to extend,
And effectively inhibit blistering.
Detailed description of the invention
[Fig. 1] Fig. 1 is the figure for illustrating to inhibit the method for slag bloating in deslagging tank.
Specific embodiment
Hereinafter, the embodiment of materialization of the invention is illustrated with reference to the accompanying drawings.
Fig. 1 is the figure for illustrating to inhibit the method for slag bloating in deslagging tank 2.
Example shown in Fig. 1 shows in multi-function rotating oven process molten slag from converter 1 and is discharged to deslagging tank 2
Example.Firstly, in the state that molten iron remains in converter 1, tilting converter 1, and make such as 12 after carrying out dephosphorization treatment
Ton~14 tons of molten slags discharge the deslagging tank 2 being arranged in below converter 1 from the fire door 3 of converter 1.At this point, since discharge
Rise, until after the completion of deslagging, put into water from the piping 4 that is arranged in deslagging tank 2 above, at the same from setting above deslagging tank 2 simultaneously
And the broken clinker that skewed slot investment (not shown) is crushed.At this point, putting into water and broken clinker to the melting furnace being discharged from converter 1
Slag stream reaches near the position in deslagging tank 2.It should be noted that the position that molten slag stream reaches in deslagging tank 2 refers to, melt
Melt the position on the surface of the molten slag in clinker stream arrival deslagging tank 2, and needs to put into water and broken clinker to this
In the range of molten slag surface violent flow near in-position.Refer within the scope of this, from the position that molten slag stream reaches
Region made of the circumference that distance 1m is played in the clinker stream periphery at the place of setting surrounds.Inhibit of molten slag in deslagging tank 2 as a result,
Bubble.In aftermentioned experiment, the efflux time of the molten slag is about 3 minutes.It should be noted that, although the melting in deslagging
The quality of clinker can weigher on the movable support bracket by the way that deslagging tank 2 is arranged in measure, but can also be according to operation item
Part and actual result estimate the quality of molten slag.But the quality that deduct the broken clinker put into from above-mentioned skewed slot is come
It is calculated.
It should be noted that more preferably making its aqueous in advance it is preferred that in advance soak broken clinker in water.This be because
For water and broken clinker can so be more reliably rolled into blistering clinker.In addition, when the diameter for being piped 4 is bigger,
Water and broken clinker can be put into from piping 4 together.Example shown in Fig. 1 shows water and broken clinker together from piping 4
The example of investment.At this moment, the diameter for being piped 4 is that broken clinker will not block the degree in being piped.
Next, being described in detail: starting by molten slag from being discharged to after deslagging tank 2 converter 1, until deslagging is complete
Cheng Hou, by putting into water and broken clinker to molten slag near the position reached in deslagging tank 2, so as to inhibit deslagging
The mechanism of molten slag blistering in tank 2.
From the molten slag that converter 1 is discharged to deslagging tank 2, such as CaO/SiO2Mass ratio (basicity) is 0.8~2.0,
FeO concentration is 10 mass of mass %~40 %.At deslagging initial stage, since molten slag is knocked the bottom of deslagging tank 2,
Molten slag is stirred vigorously, and the small CO bubbling polymerization in molten slag and separation of floating.Further, since discharge is molten
Melt clinker quick refrigeration and with the contact of the bottom of deslagging tank 2, therefore the solid rate of molten slag improves.In above-mentioned melting furnace
In the state that the solid rate of slag is improved, water and broken clinker are put into from the top of deslagging tank 2, therefore, is discharged from converter 1
Molten slag by the further quick refrigeration of gasification of water, the solid rate of molten slag further increases, and further
Significant inhibition blistering.
It should be noted that although the solid rate on the surface layer of the bottom side and molten slag of deslagging tank 2 improves, and temporarily press down
System blistering, but when the molten slag in deslagging tank 2 is contacted and melted again with the molten slag being continuously discharged from converter 1, it opens
Begin to blister.On the other hand, since the broken clinker put into together with water destroys the table of molten slag in deslagging tank 2 having cured
Facing sections, thus the inside of molten slag that enters in deslagging tank 2 of water and cooled down, blistering can be further suppressed.
Then, gas producer slag is accumulated in deslagging tank 2, and molten slag is continuously accumulated from converter 1 towards the clinker
Discharge.Then, near the position that the molten slag being discharged from converter 1 reaches in deslagging tank 2, water and broken furnace are continuously put into
Slag, and it is involved in water and broken clinker in molten slag, play effect identical with deslagging initial stage.As a result, by from deslagging
Water and broken clinker are continuously persistently put into from initial stage, is involved in water and broken clinker in molten slag, are made from the discharge of converter 1
Molten slag is successively cooling and improves the solid rate of molten slag, so as to for inhibiting the clinker in deslagging tank 2 to accumulate
Bubble.In order to reliably enjoy this effect, need to continue investment water and broken clinker after the completion of at least deslagging, and in order to
Keep its more reliable, preferably also persistently puts into water and broken clinker after deslagging completes the moment.Even if the throwing after the completion of the deslagging
It is too long to enter the duration, in time with nor preferred, and do not need that molten slag is fully cured in cost yet, because
This, the investment duration was suitble within 20 seconds.
Here, in the case where only putting into water, the range that can invade molten slag is limited, and inhibits to blister
Effect be also limited.In the case where not putting into broken clinker, when water around molten slag quick refrigeration, formed
Solidified shell, and the major part of the vapor generated by gasification sprays upwards.As a result, the cooling range of molten slag becomes
It is narrow.On the other hand, if broken clinker put into together with water, being crushed clinker physical can be destroyed by the gasification generation of water
Therefore the solidified shell of clinker can make water together with broken clinker from the part that solidified shell ruptures intrusion molten slag, can
Cooling molten slag, improves solid rate, and effectively inhibit blistering in wider range.
Next, preferred condition will be described.Hereinafter, following condition and ranges will be inquired into, and to obtaining
Optimum condition range be illustrated, the condition and range are as follows: in converter carry out molten iron processing after, by molten slag with per minute
3 tons or more of rate is discharged in deslagging tank, is breaking for 1.0mm~50mm with 30.0kg~250kg per minute, by partial size by water
Crushed slag is put into 30.0kg~250kg per minute.
Firstly, never extending from the perspective of the duration of runs of converter, it is 30m that molten slag, which is discharged to internal volume,3~
70m3Deslagging tank in rate be set as 3 tons per minute or more.Preferably 4 tons or more.In addition, the upper limit is not particularly limited, but
Because the descent rate the fast, the strength that molten slag falls increases and is easy to fly out from deslagging tank, and it is advantageous to be every point
6 tons of clock or less.More preferably 5 tons or less.
Next, water is thrown with 50.0kg~200kg per minute, by broken clinker with 50.0kg~200kg per minute
Under conditions of entering, when changing the particle size range of broken clinker, the partial size that discovery can obtain effect is 5.0mm~30mm.Just
For broken clinker of the partial size less than 5.0mm, the solidifying of due to gasification of water quick refrigeration molten slag generated can not be destroyed
Gu shell.
On the other hand, the broken clinker for being more than 30mm due to partial size is overweight, even if in the melting furnace being discharged from converter
Slag stream reaches the position in deslagging tank and is nearby put into, and the kinetic energy of the molten slag fallen can not make broken clinker well
It is dispersed in deslagging tank.It should be noted that the broken clinker of investment is less than 5.0mm containing partial size and partial size is more than 30mm's
Broken clinker is at least put into the broken clinker that partial size is 5.0mm~30mm with 50.0kg~200kg per minute.It is more excellent
The partial size for selecting broken clinker is 8.0mm~20mm, further preferably 10mm~15mm.The input amount of broken clinker will later
Description.
Next, being thrown by the broken clinker that partial size is 5.0mm~30mm with the amount of 50.0kg~200kg per minute
Under conditions of entering, when changing the investment rate of water, discovery can be obtained by the way that water is set as 50.0kg~200kg per minute
To effect.Furthermore it is known that this inclines when being put into when being put into broken clinker with 50.0kg per minute and with 200kg
To being identical.If water per minute is less than 50.0kg, the molten slag being discharged from converter cannot be cooled down successively, arranged
Slag blisters on the way to be become fierce and overflows from the upper end of deslagging tank.On the other hand, even if water per minute is set 200kg
More than, it can also sufficiently inhibit the molten slag in deslagging tank to blister, therefore effect is saturated and wastes water.It is preferred that per minute
Water is 70kg~150kg, more preferably 100kg~120kg.
Next, water is put into 50.0kg~200kg per minute, the partial size of broken clinker is set as 5.0mm~
Under conditions of 30mm, when changing the investment rate of broken clinker, discovery by by broken clinker with 50.0kg per minute~
200kg, which carries out investment, can obtain effect.It moreover has been found that when water put into and with per minute with 50.0kg per minute
When 200kg is put into, which is identical.If broken slag amount per minute is less than 50.0kg, can destroy because
The gasification of water and the range of the solidified shell of quick refrigeration molten slag generated is limited, and the cooling model of molten slag
It encloses and narrows.As a result, becoming fierce in discharge blistering on the way and being overflowed from the upper end of deslagging tank.On the other hand, even if it is per minute
Broken slag amount is more than 200kg, also can sufficiently inhibit the blistering of deslagging in-pot melting clinker, therefore effect is full and wastes brokenly
Crushed slag.It is preferred that broken clinker is 70kg~150kg per minute, more preferably 100kg~120kg.
In addition, the type as broken clinker, can be converter slag, desiliconization clinker, dephosphorization of molten iron clinker, ladle furnace
Any one of slag (steel ingot clinker).The reason is that, being required to destroy the solidification of the clinker generated in the gasification of above-mentioned water
The intensity and specific gravity of the degree of shell.It should be noted that describing the representative composition of above-mentioned clinker in table 1.
[table 1]
Table 1 is crushed the representative composition (quality %) of clinker
| Type | CaO | SiO2 | t.Fe | Al2O3 |
| Converter slag | 45 | 12 | 15 | 1 |
| Desiliconization clinker | 20 | 45 | 8 | 4 |
| Dephosphorization of molten iron clinker | 30 | 30 | 15 | 2 |
| Ladle clinker | 45 | 10 | 8 | 15 |
Converter slag is the clinker for be discharged out of furnace after decarburization blowing in converter, and basicity is usually 3~5.Desiliconization
Clinker is that iron oxide or oxygen are added in molten iron and make what [Si] in molten iron generated when aoxidizing to have high concentration SiO2
Clinker.Dephosphorization of molten iron clinker is that CaO or iron oxide, oxygen are added in molten iron, and [P] in molten iron is oxidized to (P2O5)
And clinker obtained from entering its group.Ladle clinker be after so that molten steel is discharged to continuous casting machine remain in ladle and
Al2O3The higher clinker of concentration.
Embodiment
Next, embodiment will be based on, the present invention is further illustrated, and the condition in embodiment is to confirm this
The operational feasibility and effect of invention and the condition example used, and the present invention is not limited to this condition examples.
Without departing from present subject matter, and reach the purpose of the present invention, then the present invention can use various conditions.
[embodiment 1]
After carrying out dephosphorization of molten iron processing by multi-function rotating oven process, in the state of remaining in molten iron in converter, make to turn
Furnace inclination, the molten slag that the basicity by about 14 tons is about 1, which is discharged in about 3 minutes from converter mouth, to be arranged below furnace body
Volume be 50m3Deslagging tank in.In addition, discharge molten slag when, from discharge after the completion of deslagging, by water with
100kg per minute is put into from piping, at the same by the converter slag (partial size is 5.0mm~30mm) with composition shown in table 1 with
200kg per minute is put into from skewed slot.At this point, near the position that the molten slag stream that converter is discharged reaches in deslagging tank, even
Continuous investment water and converter slag.It should be noted that the quality of the molten slag in deslagging, is not by the way that deslagging tank is arranged in
What the weigher on movable support bracket measured, but estimated according to operating condition and actual result.But it to deduct
The quality of the broken clinker put into from above-mentioned skewed slot.
As a result, being discharged to the molten slag in deslagging tank without blistering and will not overflow from deslagging tank too much from converter.
[comparative example 1]
After carrying out dephosphorization of molten iron processing by multi-function rotating oven process, in the state of remaining in molten iron in converter, make to turn
Furnace inclination, the molten slag that the basicity by about 14 tons is about 1, which is discharged in about 3 minutes from converter mouth, to be arranged below furnace body
Volume be 50m3Deslagging tank in.In addition, discharge molten slag when, from discharge after the completion of deslagging, by water with
40.0kg per minute is put into from piping, at the same by the converter slag (partial size is 5.0mm~30mm) with composition shown in table 1 with
300kg per minute is put into from skewed slot.At this point, near the position that the molten slag stream that converter is discharged reaches in deslagging tank, even
Continuous investment water and converter slag.It should be noted that the quality of the molten slag in deslagging is according to operating condition and practical knot
What fruit estimated.But to deduct the quality of the converter slag put into from above-mentioned skewed slot.
As a result, the melting furnace after since the discharge that converter is discharged to deslagging tank, by about 1.5 minutes, in deslagging tank
Slag acutely blisters and overflows from deslagging tank.
Industrial applicibility
According to the present invention, when clinker is discharged to deslagging tank from converter, the efflux time of clinker can not extended
In the case of effectively inhibit slag bloating.
Claims (2)
1. a kind of method for inhibiting slag bloating, wherein
After carrying out molten iron processing in converter, molten slag is discharged to from the converter with 3 tons per minute or more of rate
In deslagging tank, and from the discharge, until after the completion of deslagging, from the top of the deslagging tank, by water with per minute
50.0kg~200kg, by the broken clinker that partial size is 5.0mm~30mm continuously put into 50.0kg~200kg per minute extremely from
The molten slag of the converter discharge reaches near the position in the deslagging tank.
2. the method according to claim 1 for inhibiting slag bloating, wherein
The broken clinker is selected from least one of desiliconization clinker, dephosphorization of molten iron clinker, converter slag and ladle clinker
More than.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/004613 WO2018146754A1 (en) | 2017-02-08 | 2017-02-08 | Method for controlling slag foaming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110139938A true CN110139938A (en) | 2019-08-16 |
Family
ID=63108034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780082285.XA Pending CN110139938A (en) | 2017-02-08 | 2017-02-08 | Inhibit the method for slag bloating |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20190089018A (en) |
| CN (1) | CN110139938A (en) |
| WO (1) | WO2018146754A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910012272A (en) * | 1989-12-28 | 1991-08-07 | 정명식 | Slag foaming sedative |
| CN102016081A (en) * | 2008-05-27 | 2011-04-13 | 新日本制铁株式会社 | Slag foaming killing material, and slag foaming killing method |
| CN103540706A (en) * | 2012-07-11 | 2014-01-29 | 攀钢集团研究院有限公司 | Furnace slag bubblization inhibition method |
| CN104561428A (en) * | 2014-12-11 | 2015-04-29 | 新疆八一钢铁股份有限公司 | Desulfurization recovery method of slag iron of blowing-process desulfurizing slag |
| CN104878161A (en) * | 2014-02-28 | 2015-09-02 | 上海梅山钢铁股份有限公司 | Slag pressing agent for converter slag tank, and preparation method thereof |
| CN105132605A (en) * | 2015-09-02 | 2015-12-09 | 新疆八一钢铁股份有限公司 | Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash |
| WO2016129016A1 (en) * | 2015-02-10 | 2016-08-18 | Ｊｆｅスチール株式会社 | Method for inhibiting foaming of molten slag, and method for manufacturing slag product |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2596470B2 (en) | 1990-11-14 | 1997-04-02 | 新日本製鐵株式会社 | Sloping suppression method |
| JP2582692B2 (en) | 1991-11-16 | 1997-02-19 | 新日本製鐵株式会社 | Converter steelmaking method |
| JPH08325619A (en) * | 1995-05-29 | 1996-12-10 | Nippon Steel Corp | Method for restraining foaming of steelmaking slag |
| JP6477333B2 (en) * | 2015-07-29 | 2019-03-06 | 新日鐵住金株式会社 | Slag forming suppression method |
-
2017
- 2017-02-08 KR KR1020197018163A patent/KR20190089018A/en not_active Application Discontinuation
- 2017-02-08 WO PCT/JP2017/004613 patent/WO2018146754A1/en active Application Filing
- 2017-02-08 CN CN201780082285.XA patent/CN110139938A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910012272A (en) * | 1989-12-28 | 1991-08-07 | 정명식 | Slag foaming sedative |
| CN102016081A (en) * | 2008-05-27 | 2011-04-13 | 新日本制铁株式会社 | Slag foaming killing material, and slag foaming killing method |
| CN103540706A (en) * | 2012-07-11 | 2014-01-29 | 攀钢集团研究院有限公司 | Furnace slag bubblization inhibition method |
| CN104878161A (en) * | 2014-02-28 | 2015-09-02 | 上海梅山钢铁股份有限公司 | Slag pressing agent for converter slag tank, and preparation method thereof |
| CN104561428A (en) * | 2014-12-11 | 2015-04-29 | 新疆八一钢铁股份有限公司 | Desulfurization recovery method of slag iron of blowing-process desulfurizing slag |
| WO2016129016A1 (en) * | 2015-02-10 | 2016-08-18 | Ｊｆｅスチール株式会社 | Method for inhibiting foaming of molten slag, and method for manufacturing slag product |
| CN105132605A (en) * | 2015-09-02 | 2015-12-09 | 新疆八一钢铁股份有限公司 | Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190089018A (en) | 2019-07-29 |
| WO2018146754A1 (en) | 2018-08-16 |
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