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WO2018150862A1 - Matériau de suppression de moussage de laitier, procédé de suppression de moussage de laitier et procédé de soufflage en four de conversion - Google Patents

Matériau de suppression de moussage de laitier, procédé de suppression de moussage de laitier et procédé de soufflage en four de conversion Download PDF

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Publication number
WO2018150862A1
WO2018150862A1 PCT/JP2018/002897 JP2018002897W WO2018150862A1 WO 2018150862 A1 WO2018150862 A1 WO 2018150862A1 JP 2018002897 W JP2018002897 W JP 2018002897W WO 2018150862 A1 WO2018150862 A1 WO 2018150862A1
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WIPO (PCT)
Prior art keywords
slag
converter
blowing
forming
sedative
Prior art date
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Ceased
Application number
PCT/JP2018/002897
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English (en)
Japanese (ja)
Inventor
将史 山口
玲洋 松澤
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Nippon Steel Corp
Original Assignee
Nippon Steel and Sumitomo Metal Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel and Sumitomo Metal Corp filed Critical Nippon Steel and Sumitomo Metal Corp
Priority to CN201880005568.9A priority Critical patent/CN110168114A/zh
Priority to KR1020197017447A priority patent/KR20190086726A/ko
Priority to JP2018568084A priority patent/JP6753476B2/ja
Publication of WO2018150862A1 publication Critical patent/WO2018150862A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
    • 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
    • C21C5/36—Processes yielding slags of special composition
    • C21C2005/366—Foam slags

Definitions

  • the present invention relates to a slag calming material, a calming method, and a converter blowing method.
  • Non-Patent Document 1 after the molten iron discharged from the blast furnace was charged into the converter and subjected to de-Si and P blowing, the converter was tilted to leave the molten iron in the converter.
  • a method is disclosed in which slag generated in a state is discharged from the furnace port and then de-C blowing is performed.
  • Patent Document 1 discloses that after the molten iron discharged from the blast furnace is charged into the converter and subjected to de-Si blowing, the converter is tilted to leave the molten iron in the converter.
  • the slag generated in the state is discharged from the furnace port, de-P blowing is performed, and then the molten iron is discharged from the converter once to separate it from the de-P slag, and only this molten iron is charged into another converter again.
  • a method for performing de-C blowing is disclosed.
  • the former is an operation method using one converter
  • the latter is an operation method using two or more converters. In both methods, the slag generated during blowing is efficiently discharged from the furnace port. This is common in that the volume of slag is increased by using foaming.
  • Slag forming in the converter occurs when the gas dissipation rate of the slag falls below the gas supply rate to the slag.
  • slag formed during de-Si (and de-P) blowing is discharged outside the furnace, and at that time, it is accommodated in a slag pan (drain pan) installed under the furnace.
  • a slag pan drain pan installed under the furnace.
  • the amount of waste discharged into the slag pan is increased, the amount of SiO 2 and P 2 O 5 remaining in the furnace can be reduced, and the amount of new auxiliary raw materials such as quick lime can be reduced. Therefore, it is required to discharge a large amount of slag outside the furnace in a short time.
  • the reason for the short time is that the slag forming height tends to decrease after the end of blowing, so it is considered that slag can be discharged to the outside of the furnace in the shortest time.
  • Patent Document 2 discloses a sedative material (slag antifoaming agent) in which a mixture of a light metal, a carbonaceous material, a metal hydroxide, and / or water is present independently of each other.
  • Patent Document 3 discloses a sedative material (forming inhibitor) containing raw dolomite, and a sedative method using an endothermic reaction by this raw dolomite.
  • Patent Document 4 discloses a sedative material (forming inhibitor) containing aluminum hydroxide and calcium carbonate as constituent components.
  • JP 2013-167015 A JP 63-137116 A JP 2003-213314 A Japanese Patent No. 6005310
  • the present invention has been made in view of such circumstances, and slag forming sedation capable of efficiently stifling forming of slag discharged after de-Si and de-P blowing or discharged outside the furnace after de-Si blowing.
  • An object of the present invention is to provide a material and slag forming sedation method and a converter blowing method.
  • the gist of the present invention made to solve the above problems is as follows.
  • a slag-forming sedative material comprising 50% by mass or more of hydroxide and having an endothermic amount of 1800 J / g or more.
  • the slag forming sedative of the present invention further comprising 20% by mass to 50% by mass of organic matter.
  • the molten iron charged in at least one of the two or more converters is subjected to de-Si blowing and tilted to leave the molten iron in the converter.
  • the slag in the converter is discharged from the furnace port, the slag forming sedation method of the present invention is applied, and after the discharge, de-P blowing is performed on the molten iron in the converter. Furnace blowing method.
  • the slag forming soothing material according to the present invention contains 50 mass% or more of hydroxide and has an endothermic amount of 1800 J / g or more, the cooling effect of the slag can be enhanced and the slag forming can be calmed more than before. Can do.
  • the slag forming sedation method and the converter blowing method according to the present invention use the sedative material described above, the slag forming in the slag pan when slag is discharged from the furnace port of the converter is sedated. A large amount of slag can be discharged from the converter without causing slag overflow.
  • the slag forming sedative according to an embodiment of the present invention includes 50% by mass or more of hydroxide and has an endotherm of 1800 J / g or more. This will be described in detail below.
  • oxygen is supplied to the hot metal, so that Si and P in the hot metal are oxidized to SiO 2 and P 2 O 5 and transferred to slag and removed.
  • C in the hot metal reacts with oxygen gas or FeO in the slag to become CO gas, and a part thereof is captured by the slag and stays in the slag, thereby forming.
  • the relationship between the amount of water input and the sedation rate is shown in FIG.
  • the sedation rate increased as the amount of water input increased, and was saturated when the amount of water input was 0.1 g or more. From this, it was found that moderate water injection exerts a significant sedative effect by slag cooling. Although the sedation rate slightly decreased when the amount of water input was 0.3 g, this was because the surface of the slag was locally cooled to below the melting point when the amount of water input was too large, and the part was skinned. This is presumed to reduce the dissipation of bubbles in the slag.
  • FIG. 2 shows the relationship between the endothermic amount and the sedation rate.
  • the sedation rate increases as the endothermic amount increases. It can be confirmed that an endothermic amount of 1800 J / g or more is necessary to obtain a good sedation rate.
  • the endothermic amount exceeds 4000 J / g, the sedation rate tends to decrease slightly, and therefore the endothermic amount is preferably 4000 J / g or less.
  • composition range of a suitable hydroxide of the sedative material will be described.
  • 50 mass% (preferably 55 mass%) is set as the lower limit.
  • the upper limit value of the ratio of hydroxide is not particularly limited, but when it exceeds 80% by mass, the cooling amount per unit mass of the sedative becomes large, and the slag becomes a solid phase locally, so that the forming sedative effect is achieved. Is sometimes 80% by mass or less.
  • the sedative material preferably has a density of 1.5 g / cm 3 or more. If the density of the sedative material is not higher than the density of the formed slag (for example, 1.0 to 1.5 g / cm 3 ), the effect of the sedative material is exerted only on the surface of the slag in the slag pan. May decrease. Therefore, it is preferable that the density of the sedative material is equal to or higher than the density of the formed slag, that is, 1.5 g / cm 3 or higher.
  • the upper limit is not particularly limited, but if the configuration of the sedative material is taken into account For example, it is about 3 g / cm 3 .
  • the sedative material preferably contains 20% by mass or more and 50% by mass or less of organic matter (preferably, the lower limit is 25% by mass and the upper limit is 45% by mass). Based on the above-mentioned effects, it was found that foaming can be effectively sedated by the sedative effect of the generation of bubbles due to cooling of the slag. Can not. Then, the further sedative effect is anticipated by giving the gas dissipation effect to the sedative material.
  • An organic substance is preferable as the substance having the gas dissipation effect. This is because the organic substance contains carbon, and therefore a gas dissipation effect is expected. Also, the organic substance absorbs heat by a thermal decomposition reaction, and the organic substance is inexpensive, easy to obtain and easy to handle. Because of the advantages.
  • the sedative material contains 50% by mass or more (preferably 80% by mass or less) of hydroxide, it can be composed only of hydroxide and organic matter.
  • An oxide may be included instead of the organic substance.
  • examples of the hydroxide include Al (OH) 3 and Ca (OH) 2 .
  • examples of organic substances include resins such as acrylic resin and methacrylic resin, and wood chips (wood) such as cedar and red pine.
  • examples of the oxide include iron oxide, SiO 2 , MgO, and Al 2 O 3 .
  • calcium carbonate has a low endothermic amount, and the amount of hydroxide is reduced by the amount of calcium carbonate. Therefore, the sedative effect may be reduced due to a decrease in the endothermic amount. Therefore, the sedative material of the present invention does not contain or contains calcium carbonate (CaCO 3 ), preferably 6% by mass or less, and more preferably less than 3% by mass.
  • the particle size of the sedative material is preferably 3 mm or more and 20 mm or less. This is because, when the particle size of the sedative material is less than 3 mm, the particle size becomes excessively fine. For example, shelves can be suspended in the charging hopper that supplies the sedative material, and the working environment can be deteriorated by rising as dust. This is because the nature increases. On the other hand, when the particle size is more than 20 mm, it is difficult to quickly dissolve in the slag, and the sedative effect of forming tends to be small.
  • the sedative material shown above is preferably put in a container such as a bag and put in the vicinity of the dropping position of the drainage flow. At this position, the stirring of the slag in the slag pan is the largest, the hydroxide contained in the sedative material can reach the inside of the slag, and the forming can be effectively sedated easily.
  • the slag forming sedation method using the sedative material shown above is to seduce the slag forming in the slag pan by discharging the slag into the slag pan when the slag is discharged from the furnace opening of the converter to the slag pan. In this method, a large amount of slag can be discharged from the converter without causing slag overflow.
  • molten iron is charged into the converter and blown, and the blowing is suspended and the converter is tilted to leave the molten iron in the converter. It can be used in a converter blowing method in which slag is discharged into a slag pan installed below the furnace. Specifically, it is as follows.
  • the molten iron charged in one converter is subjected to de-Si blowing and de-P blowing, and the converter is tilted, and the slag in the converter is discharged from the furnace outlet while leaving the molten iron in the converter.
  • the above-described slag forming sedation method is applied (that is, the above-mentioned sedative material is put into the slag pan), and after the slag, de-C blowing is performed on the molten iron in the converter (one unit)
  • the molten iron charged in at least one of the two or more converters is subjected to de-Si blowing and tilted to leave the molten iron in the converter.
  • the slag forming sedation method described above is applied (that is, the slagging material is introduced into the slag pan), and after the slag is discharged, the molten iron in the converter is de-P blown (Converter blowing method using two or more converters: see Patent Document 1).
  • the above-described method uses the slag forming phenomenon to discharge slag from the furnace port, the same effect can be obtained by implementing the above-described slag forming sedation method. .
  • the slag forming sedation method is required (slag forming sedative material) Slag overflow can be sedated by using the slag.
  • the slag forming sedative material of the present invention can be used as a slag forming sedative material generated in a converter.
  • the symbols A1, A2, B1, B2, C1, C2, and C3 are examples of the present invention.
  • the sedatives of the symbols A1 and A2 use Al (OH) 3 or Ca (OH) 2 as the hydroxide, and do not contain organic substances.
  • the soothing materials of symbols B1 and B2 use Ca (OH) 2 as the hydroxide and only wood and acrylic resin or acrylic resin as the organic substance.
  • the sedatives of symbols C1, C2, and C3 use Al (OH) 3 as the hydroxide and acrylic resin or methacrylic resin as the organic substance.
  • components other than the hydroxide and organic substance in Table 1 are oxides such as iron oxide, SiO 2 , MgO, and Al 2 O 3 .
  • symbols D1, E1, and F1 are comparative examples. Specifically, the sedatives of symbols D1 and E1 do not contain hydroxide, and are replaced with raw dolomite or CaCO 3 . Further, the sedative material represented by the symbol F1 has a hydroxide (Ca (OH) 2 ) content of less than the lower limit of the appropriate range of the present invention. In addition, all the soothing materials of symbols D1, E1, and F1 contain organic substances, and each contains acrylic resin or methacrylic resin.
  • the endothermic amount of each sedative was measured using a differential thermal analysis (DTA) device, crucible: platinum, sample weight: 20-30 mg, sample particle size: under 150 ⁇ m, heating rate: 10 ° C./min, maximum temperature: 1450 ° C. , And the atmosphere: Ar.
  • DTA differential thermal analysis
  • the state in the slag pan was visually observed during slag drainage. At this time, if the slag is likely to overflow from the slag pan, the tilting of the converter is temporarily stopped and the slag is interrupted, and if the slag does not overflow due to stagnation of forming growth, the converter is tilted again. Rescued again.
  • the evacuation time includes the time during which evacuation was interrupted, and sedative material was continuously added even when the evacuation was interrupted.
  • the change in weight was measured with a weighing machine attached to the mobile trolley on which the slag pan was installed, and the weight of the slag discharged (w slag ) was calculated by subtracting the weight of the sedative material introduced into the slag pan. Moreover, the weight (W slag ) of the slag in the converter before discharge was calculated by the following method.
  • the weight W slag (ton / charge) of the slag in the converter before slagging is the weight of the recycled slag W R-slag (ton / charge) and the amount of SiO 2 generated by oxidation of Si in the hot metal W SiO2 ( Ton / charge) and the CaO input amount W CaO (ton / charge) to the converter, that is, the following formula can be used.
  • W slag W R-slag + W SiO 2 + W CaO
  • the recycle slag is slag with low P concentration remaining in the converter after de-C blowing in the pre-charge and removing the molten steel from the steel outlet hole of the converter. It can be used for dephosphorization of hot metal by de-Si (and de-P).
  • the weight W R-slag of the recycled slag is the amount of slag remaining in the converter after the pre-charge de-C blowing, and the slag is discharged when the slag is discharged from the furnace port after the de-C blowing. It can be calculated from the tilt angle of the furnace.
  • the tilt angle of the converter is a final angle (tilt angle) obtained by tilting the axis of the converter with the converter upright (blowing state) as a reference (0 degree).
  • the amount of SiO 2 W SiO2 generated by the oxidation of Si in the hot metal can be calculated from the following equation using the analytical value of the hot metal for which the hot metal pretreatment was measured in advance.
  • W SiO2 (HM) ⁇ (HM-Si) ⁇ (SiO 2 molecular weight) / (Si molecular weight)
  • HM is the amount of hot metal (ton / charge)
  • HM-Si is the amount of Si (% by mass) in the hot metal
  • the SiO 2 molecular weight is 60.1
  • the Si molecular weight is 28.1.
  • the CaO input amount WCaO to the converter can be obtained from the amount of auxiliary material (CaO amount) added to the slag in the converter when the hot metal preliminary treatment is performed.
  • the rejection rate is affected by the internal volume of the converter, the internal volume of the slag pan, the amount of molten iron, etc., in addition to the slag forming in the slag pan.
  • the treatment method shown in Table 2 shows a rejection rate of 60% or more
  • a rejection rate of 50% or more is regarded as a good rejection rate.
  • the presence or absence of the slag overflowing from the slag pan during excretion was determined visually.
  • the slag composition was basicity (CaO mass% / SiO 2 mass%) of 1.0 to 1.3, the iron oxide concentration in the slag was 20 to 30 mass%, and the slag temperature was 1250 to 1350 ° C. It was.
  • Examples 1 to 7 shown in Table 2 are examples using the soothing materials of the examples described in Table 1 above.
  • the hydroxide content in the sedative material and the endothermic amount of the sedative material are within the proper range of the present invention. Because it was inside, the slag could be quickly discharged without overflowing the slag pan. Therefore, the rejection rate was as high as 61% by mass or more.
  • Comparative Example 8 shown in Table 2 is an example in which no sedative material was added
  • Comparative Examples 9 to 11 shown in Table 2 are examples in which the sedative material of Comparative Example described in Table 1 was used.
  • Comparative Example 8 since no sedative material was added, slag overflowed from the slag pan, and the rejection rate was only about 28% by mass.
  • Comparative Example 9 did not contain a hydroxide and used a sedative material having a low endotherm (Comparative Example 9: 994 J / g, Comparative Example 10: 947 J / g)
  • the sedative effect of forming was reduced. It was. As a result, the evacuation rate was only 48 to 50% by mass because the evacuation was temporarily suspended.
  • Comparative Example 11 a sedative material having an excessive hydroxide content (40% by mass) was used. Therefore, for the same reason as Comparative Examples 9 and 10, the rejection rate was about 51% by mass.
  • the slag composition was such that the basicity (CaO mass% / SiO 2 mass%) was 0.6 to 0.8, the iron oxide concentration in the slag was 20 to 30 mass%, and the slag temperature was 1250 to 1350 ° C. It was.
  • Examples 12 to 18 shown in Table 3 are examples using the soothing materials of the examples described in Table 1 above.
  • the hydroxide content in the sedative material and the endothermic amount of the sedative material are within the proper range of the present invention. Because it was inside, the slag could be quickly discharged without overflowing the slag pan. Therefore, the rejection rate was as high as 50% by mass or more.
  • Comparative Example 19 shown in Table 3 is an example in which no sedative material was added, and Comparative Examples 20 to 22 shown in Table 3 are examples using the sedative material of Comparative Examples described in Table 1 above.
  • Comparative Example 19 since no sedative material was added, slag overflowed from the slag pan, and the rejection rate was only about 28% by mass.
  • Comparative Example 20 did not contain hydroxide and used a sedative material having a low endotherm (Comparative Example 20: 994 J / g, Comparative Example 21: 947 J / g), the sedative effect of forming was reduced. It was. As a result, the evacuation rate was only 38 to 40% by mass since the evacuation was temporarily suspended.
  • Comparative Example 22 used a sedative material with an excessive hydroxide content (40% by mass), the rejection rate was about 45% by mass for the same reason as Comparative Examples 20 and 21.
  • the slag discharged from the furnace after de-Si and de-P blowing or after de-Si blowing by the slag forming sedative and slag forming sedative method and converter blowing method of the present invention It was confirmed that the forming can be effectively sedated.
  • the present invention has been described with reference to the embodiment.
  • the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims.
  • Other embodiments and modifications conceivable within the scope are also included.
  • a case where the slag forming sedative material, the slag forming sedative method, and the converter blowing method of the present invention are configured by combining some or all of the above-described embodiments and modifications are also included in the scope of the present invention. It is.
  • the slag forming sedative material is added to the slag pan that rejects the slag has been described.
  • the slag forming agent is not limited to the slag pan as long as the slag forming is calmed down. It can also be put into a pot.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

Cette invention concerne un matériau de suppression de moussage de laitier qui comprend au moins 50 % en masse d'hydroxyde et dont l'énergie endothermique est de 1800 J/g ou plus. L'invention concerne en outre un procédé de suppression de moussage de laitier selon lequel ledit matériau de suppression de moussage de laitier est introduit dans une cuve à laitier dans laquelle le laitier est déversé. L'invention concerne enfin un procédé de soufflage en four de conversion dans lequel un soufflage de désilification et un soufflage de déphosphoration sont réalisés sur un métal chaud chargé dans un seul four de conversion ou un soufflage de désilification est effectué sur du métal chaud chargé dans au moins un four de conversion parmi au moins deux fours de conversion, le four de conversion étant incliné. Le procédé de suppression de moussage de laitier est utilisé lorsque le laitier à l'intérieur du four de conversion est déchargé à partir d'une ouverture de four dans un état dans lequel le métal chaud reste à l'intérieur du four de conversion, et après la décharge du laitier, un soufflage de décarbonisation est effectué sur le métal chaud à l'intérieur du four de conversion.
PCT/JP2018/002897 2017-02-20 2018-01-30 Matériau de suppression de moussage de laitier, procédé de suppression de moussage de laitier et procédé de soufflage en four de conversion Ceased WO2018150862A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880005568.9A CN110168114A (zh) 2017-02-20 2018-01-30 熔渣成型镇静材料、熔渣成型镇静方法以及转炉吹炼方法
KR1020197017447A KR20190086726A (ko) 2017-02-20 2018-01-30 슬래그 포밍 진정재 및 슬래그 포밍 진정 방법 그리고 전로 취련 방법
JP2018568084A JP6753476B2 (ja) 2017-02-20 2018-01-30 スラグフォーミング鎮静材及びスラグフォーミング鎮静方法並びに転炉吹錬方法

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JP2017028842 2017-02-20
JP2017-028842 2017-02-20

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WO2018150862A1 true WO2018150862A1 (fr) 2018-08-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI729791B (zh) * 2020-04-27 2021-06-01 中國鋼鐵股份有限公司 改善爐渣流動性的方法
JP2023001041A (ja) * 2021-06-18 2023-01-04 Ｊｆｅスチール株式会社 精錬方法
JP7464843B2 (ja) 2020-09-01 2024-04-10 日本製鉄株式会社 スラグのフォーミング鎮静方法および転炉精錬方法
JP7572621B2 (ja) 2021-01-15 2024-10-24 日本製鉄株式会社 フォーミング鎮静材およびそれを用いたフォーミングの鎮静方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137116A (ja) * 1986-11-27 1988-06-09 Riken Kogyo Kk スラグ泡立防止剤
KR20130066134A (ko) * 2011-12-12 2013-06-20 주식회사 포스코 슬래그 포밍 진정제 및 이를 이용한 슬래그 포밍 진정 방법
WO2016129016A1 (fr) * 2015-02-10 2016-08-18 Ｊｆｅスチール株式会社 Procédé permettant d'empêcher le moussage du laitier en fusion et procédé permettant de fabriquer un produit de laitier
JP6005310B1 (ja) * 2016-01-20 2016-10-12 イントキャストジェーピー株式会社 フォーミング抑制剤

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605310A (ja) 1983-06-23 1985-01-11 Fujitsu Ltd ユニツト搭載電気装置
JP3972660B2 (ja) 2002-01-17 2007-09-05 Ｊｆｅスチール株式会社 溶銑の鋳床脱珪処理におけるフォーミング防止剤およびその投入方法
JP4580435B2 (ja) * 2008-05-27 2010-11-10 新日本製鐵株式会社 排滓鍋スラグのフォーミング鎮静材及びその鎮静方法
JP5408369B2 (ja) * 2012-01-19 2014-02-05 Ｊｆｅスチール株式会社 溶銑の予備処理方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137116A (ja) * 1986-11-27 1988-06-09 Riken Kogyo Kk スラグ泡立防止剤
KR20130066134A (ko) * 2011-12-12 2013-06-20 주식회사 포스코 슬래그 포밍 진정제 및 이를 이용한 슬래그 포밍 진정 방법
WO2016129016A1 (fr) * 2015-02-10 2016-08-18 Ｊｆｅスチール株式会社 Procédé permettant d'empêcher le moussage du laitier en fusion et procédé permettant de fabriquer un produit de laitier
JP6005310B1 (ja) * 2016-01-20 2016-10-12 イントキャストジェーピー株式会社 フォーミング抑制剤

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TWI729791B (zh) * 2020-04-27 2021-06-01 中國鋼鐵股份有限公司 改善爐渣流動性的方法
JP7464843B2 (ja) 2020-09-01 2024-04-10 日本製鉄株式会社 スラグのフォーミング鎮静方法および転炉精錬方法
JP7572621B2 (ja) 2021-01-15 2024-10-24 日本製鉄株式会社 フォーミング鎮静材およびそれを用いたフォーミングの鎮静方法
JP2023001041A (ja) * 2021-06-18 2023-01-04 Ｊｆｅスチール株式会社 精錬方法
JP7508022B2 (ja) 2021-06-18 2024-07-01 Ｊｆｅスチール株式会社 精錬方法

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