JPS621446B2 - - Google Patents
Info
- Publication number
- JPS621446B2 JPS621446B2 JP8993982A JP8993982A JPS621446B2 JP S621446 B2 JPS621446 B2 JP S621446B2 JP 8993982 A JP8993982 A JP 8993982A JP 8993982 A JP8993982 A JP 8993982A JP S621446 B2 JPS621446 B2 JP S621446B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- weight
- forming agent
- basic
- refractories
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000002893 slag Substances 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- 239000011449 brick Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 9
- 238000009628 steelmaking Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical class [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000011819 refractory material Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010436 fluorite Substances 0.000 description 5
- 230000029087 digestion Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- ATRMIFNAYHCLJR-UHFFFAOYSA-N [O].CCC Chemical compound [O].CCC ATRMIFNAYHCLJR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 235000011437 Amygdalus communis Nutrition 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 241000220304 Prunus dulcis Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000020224 almond Nutrition 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 etc.) Chemical compound 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
本発明は塩基性煉瓦屑を転炉、電気炉等塩基性
製鋼炉に使用後の煉瓦屑を主体として、滓化促進
剤および生石灰の消化防止剤ならびに硬化剤から
なる、改良された塩基性製鋼炉用複合造滓剤に係
る。
従来塩基性製鋼炉の操業においては造滓剤とし
て、一般に焼石灰を主体に使用しているが操業初
期の滓化性が不足するため螢石の併用が常識とさ
れてきた。しかし螢石を使用すると有害なフツ素
ガスが発生し、また炉内内張り耐火物（以下耐火
物という）の損傷を促進するなどの欠点があるに
もかゝわらず、焼石灰の滓化速度を高める働らき
が大きく、また溶鋼中の脱リン、脱酸反応を促進
し、炉の操業率を向上するなどの利点を有するた
め、螢石の使用は不可欠なものとされてきた。
したがつて螢石の欠点である耐火物の損傷を防
止するための対策としては、反応が活性な軽焼ド
ロマイトや軽焼マグネシアを使用して鋼中のスラ
グコントロール、すなわちスラグ中のMgO分を
飽和させて耐火物中のMgO析出を防止し、耐火
物表面に粘稠なMgO層を形成させる技術がおこ
なわれている。
本発明はこのような欠点をもつ螢石を滓化促進
剤として使用しない複合造滓剤であつて、操業初
期における造滓性を向上するとともに転炉などで
使用済の煉瓦屑を再利用したものであつて、耐火
物の損傷を防止し、しかも経済的に優位で安価な
省資源的な造滓剤を提供するものである。
すなわち、本発明は塩基性製鋼炉で使用済みの
塩基性煉瓦屑を主体に使用するため、耐火物の損
傷防止に有効なMgO成分を多量に含有し、その
うえ造滓性に有効なCaO成分も含有している。こ
の一例として、タールドロマイト、（タール、マ
グ・ドロなど）使用済煉瓦屑がMgO―CaO系組
成の代表例として挙げられる。また、滓化性を向
上するため、この煉瓦屑を粒径10mm以下に粉砕
し、融点を下げ造粒のための成形性を付与するた
めに、アルカリ含有超微粉をもつカオリン族など
の残留漂着粘土類、酸化鉄（ベンガラ、ミルスケ
ール、鉄粉等）、消石灰、炭素類の４原料をそれ
ぞれ粒径1.0mm以下で５〜10重量％添加（計20〜
40重量％）混合することによつて滓化性を著しく
向上することが実験の結果確認できた。
しかし、煉瓦屑中にCaOを含有する場合、
CaO＋H2O→Ca（OH）2
の反応によつて、消化現象を起こすため消化防止
剤として、硼砂２〜６％溶液を３〜６重量％添加
混合することによつて消化を防止し、かつ母材の
溶融点を低下させる効果を挙げる。またMgCl2の
飽和溶液を３〜６重量％添加して混練すると、マ
グネシアセメントを生成し硬化剤の役目をはた
す。
このようにして得られた混練物を造粒するか、
または煉瓦形状に成形し塊状に粗砕して乾燥工程
を経ないで使用するので、残存水分があるため実
用時溶鋼中でバブリング現象が発生し、その結果
造滓剤が粉化し反応がいつそう活発になり、造滓
効果が活発になる。また炭素材（黒鉛、タールな
ど）の添加によつて、造滓剤と溶鋼中の不純物と
の反応にもとずく発泡現象を防止する。すなわち
炭素分は消泡剤として働らく。
このように、本発明に係る塩基性製鋼炉用複合
造滓剤は使用済煉瓦屑を主体に配合するため、資
源の再利用に貢献し、さらに滓化性が速いこと、
消泡効果があること、耐火物の損傷防止に効果が
あること、造粒あるいは成形物を粗砕するなど所
要の形状にすることで運搬や炉内投入時の発塵防
止に有効で、種々優れた特性を具えている。
つぎに本発明の実施例を具体的に説明する。
実施例
本発明に係る造滓剤を試作して種々実験をおこ
ない効果を確認した。
The present invention is an improved basic steel manufacturing method that uses basic brick waste after being used in basic steelmaking furnaces such as converters and electric furnaces, and which contains a slag accelerator, a quicklime digestion inhibitor, and a hardening agent. Pertains to composite slag forming agents for furnaces. Conventionally, in the operation of basic steelmaking furnaces, burnt lime has generally been mainly used as a slag-forming agent, but since slag-forming properties are insufficient in the early stages of operation, it has been common practice to use fluorite in combination. However, the use of fluorite generates harmful fluorine gas and accelerates damage to the furnace lining refractories (hereinafter referred to as refractories). The use of fluorite has been considered indispensable because it has a great effect on increasing the molten steel, promotes dephosphorization and deoxidation reactions in molten steel, and improves the operating rate of the furnace. Therefore, as a measure to prevent damage to refractories, which is a drawback of fluorite, it is possible to control slag in steel by using reactively active dolomite or light calcined magnesia, that is, to reduce the MgO content in slag. Techniques are being used to prevent MgO precipitation in refractories by saturating them and forming a viscous MgO layer on the surface of the refractories. The present invention is a composite slag-forming agent that does not use fluorite, which has such drawbacks, as a slag accelerator, and improves slag-forming properties at the initial stage of operation, as well as reusing brick waste used in converters etc. The object of the present invention is to provide a slag forming agent that prevents damage to refractories, is economically advantageous, is inexpensive, and saves resources. In other words, since the present invention mainly uses basic brick waste used in basic steelmaking furnaces, it contains a large amount of MgO components that are effective in preventing damage to refractories, and also contains CaO components that are effective in slag-forming properties. Contains. As an example, tar dolomite and used brick waste (tar, mag-doro, etc.) are representative examples of MgO--CaO based compositions. In addition, in order to improve the slagability, this brick waste is crushed to a particle size of 10 mm or less, and in order to lower the melting point and give it moldability for granulation, residual kaolin group containing alkali-containing ultrafine powder is added. Add 5 to 10% by weight of four raw materials: clay, iron oxide (red iron oxide, mill scale, iron powder, etc.), slaked lime, and carbon, each with a particle size of 1.0 mm or less (total of 20 to 10% by weight)
As a result of experiments, it was confirmed that the sludge formation property was significantly improved by mixing 40% by weight). However, when CaO is contained in brick waste, the reaction of CaO + H 2 O → Ca (OH) 2 causes digestion, so 3 to 6% by weight of a 2 to 6% solution of borax is added as an anti-digestion agent. Mixing has the effect of preventing digestion and lowering the melting point of the base material. Furthermore, when 3 to 6% by weight of a saturated solution of MgCl 2 is added and kneaded, magnesia cement is produced and acts as a hardening agent. The kneaded material obtained in this way is granulated, or
Alternatively, since it is used without going through a drying process after being formed into a brick shape and coarsely crushed into blocks, there is residual moisture, which causes bubbling phenomenon in the molten steel during practical use, resulting in the slag forming agent becoming powder and the reaction occurring at any time. become active, and the slag effect becomes active. Furthermore, the addition of carbon materials (graphite, tar, etc.) prevents foaming caused by the reaction between the slag forming agent and impurities in the molten steel. In other words, the carbon content acts as an antifoaming agent. As described above, since the composite slag-forming agent for basic steelmaking furnaces according to the present invention mainly contains used brick waste, it contributes to the reuse of resources, and furthermore, it has a rapid slag-forming property.
It has a defoaming effect, it is effective in preventing damage to refractories, and it is effective in preventing dust generation during transportation and loading into furnaces by granulating or crushing molded products into the desired shape. It has excellent properties. Next, embodiments of the present invention will be specifically described. EXAMPLE The sludge forming agent according to the present invention was prototyped and various experiments were conducted to confirm its effectiveness.
【表】
この煉瓦屑を粒径10mm以下に粉砕して下表のご
とく配合した。なお比較試料としては、現在常用
中の造滓剤のうち代表的な軽焼マグネシアと、使
用済煉瓦屑単味品を挙げる。[Table] This brick waste was crushed to a particle size of 10 mm or less and mixed as shown in the table below. Comparative samples include light burnt magnesia, which is a typical slag-forming agent currently in use, and a single product made from used brick scraps.
【表】
上表によつて、混合した試番No.１は水分10重量
％のみを添加し、同じくNo.２ないしNo.４は硼砂２
％水溶液を６重量％とMgCl2飽和溶液を３重量％
添加して、アーモンド状にブリケツテイングし
た。添加量はいずれも外掛け量である。
試料は長さ30mm、幅25mm、厚さ10mmのアーモン
ド状である。[Table] According to the above table, mixed trial No. 1 has only 10% water added, and No. 2 to No. 4 have 2 borax.
6% aqueous solution and 3% MgCl2 saturated solution by weight
The mixture was added and briquetteted into an almond shape. All amounts added are external amounts. The sample is almond-shaped, 30 mm long, 25 mm wide, and 10 mm thick.
【表】
アーモンド状の複合造滓剤は固形のため、実用
時炉内に投入の際発塵防止に効果がある。[Table] Since the almond-shaped composite slag forming agent is solid, it is effective in preventing dust generation when put into the furnace in practical use.
【表】
蒸壊試験は75℃で飽和蒸気中に３時間挿入し、
試料の消化程度を調べたところ、No.２は完全に崩
壊していたにも拘らず、No.１、No.３、No.４は変化
しなかつた。したがつて保管による粉化の懸念は
ないことが判つた。
＃１ 軟化点の測定は、試料を粉砕してゼーゲル
コーン形状に成形し、酸素―プロパン炉で
おこなつた。No.１、No.２に比較して、本発
明品No.３、No.４は軟化点が著しく低く（約
200℃程度あるいはそれ以上の差）、これは
滓化性が良いことを証明している。
＃２ 軟化点に関しては、造滓剤の初期滓化性を
判断する場合、造滓剤と高炉スラグの反応
速度が速い程、その効果が大きいという見
解から、各造滓剤100重量％に対して高炉
スラグ粉末（0.3mm以下）50重量％混合物
で、その軟化点を測定した。その結果、No.
１、No.２に比較して、本発明品No.３、No.４
は明らかに軟化点が低く（約100℃差）、反
応が速やかに進行することが確認できた。
この測定で、高炉スラグを採用した理由
は、転炉など塩基性製鋼炉の操業初期のス
ラグは高炉スラグによるため、造滓剤の初
期反応が重要な因子であるとの見地から、
この初期反応の速さを把握するのに適切で
あると考えたためである。
スラグ試験は、回転式侵蝕試験機を用いて滓化
性の確認実験をおこなつた。試料は80mm×60mm×
30mmのサイズで各配合についてそれぞれ成形圧力
200Kg/cm2で成形し、角度45度に傾斜した円筒内に
これらの試料を組み合せ、この円筒内ほぼ中央部
に、一辺50mmの正方形の上下面で高さ60mmの空間
部（50mm口×60mm）を形成し、この容器を回転さ
せながら酸素―プロパンバーナーで加熱し1550℃
昇温後、上記空間部に高炉スラグ片200グラムを
投入し、溶解20分後にスラグを排出して試料の侵
蝕深さを測定した。その結果、本発明品No.３およ
びNo.４はいずれも比較試料（常用商品）No.１の約
10倍、従来の使用済煉瓦屑単味からなるNo.２に比
較しても約２倍の侵蝕度を示し、本発明に係る複
合造滓剤は反応速度がきわめて速く、塩基性製鋼
炉用造滓剤として最も高性能であつて、耐火物と
の化学、物理的平衡（バランス）上から実用上有
益なものであることが実証された。[Table] The steaming test was conducted by inserting the sample into saturated steam at 75℃ for 3 hours.
When the degree of digestion of the samples was examined, although No. 2 had completely disintegrated, No. 1, No. 3, and No. 4 remained unchanged. Therefore, it was determined that there was no concern about powdering during storage. #1 The softening point was measured by pulverizing the sample and forming it into a Segel cone shape in an oxygen-propane furnace. Compared to No. 1 and No. 2, the products of the present invention No. 3 and No. 4 have a significantly lower softening point (approximately
(difference of about 200℃ or more), which proves that it has good slagability. #2 Regarding the softening point, when determining the initial slag-forming ability of a slag-forming agent, the faster the reaction rate between the slag-forming agent and blast furnace slag, the greater the effect, so The softening point of a 50% by weight mixture of blast furnace slag powder (0.3 mm or less) was measured. As a result, No.
1. Compared to No. 2, the invention products No. 3 and No. 4
It was confirmed that the softening point was clearly lower (approximately 100°C difference) and the reaction proceeded rapidly.
The reason why blast furnace slag was used in this measurement was from the viewpoint that the initial reaction of the slag forming agent is an important factor, since the slag at the initial stage of operation of basic steelmaking furnaces such as converters is blast furnace slag.
This is because we thought it was appropriate to understand the speed of this initial reaction. The slag test was conducted using a rotary erosion tester to confirm slag formation. The sample is 80mm x 60mm x
Molding pressure for each formulation at 30mm size
These samples were molded at 200Kg/cm 2 and assembled in a cylinder inclined at an angle of 45 degrees.A space with a square shape of 50mm on a side and a height of 60mm (50mm opening x 60mm ) and heated this container with an oxygen-propane burner while rotating it to 1550℃.
After raising the temperature, 200 grams of blast furnace slag pieces were put into the space, and after 20 minutes of melting, the slag was discharged and the erosion depth of the sample was measured. As a result, both the invention products No. 3 and No. 4 were found to be about the same as comparative sample (commonly used product) No. 1.
The composite slag forming agent according to the present invention has an extremely fast reaction rate and is suitable for use in basic steelmaking furnaces. It has been demonstrated that it has the highest performance as a slag-forming agent and is practically useful due to its chemical and physical balance with refractories.
Claims (1)
以下粉砕物60〜80重量％、粘土、酸化鉄、消石
灰、炭素それぞれ５〜10重量％の合計量100重量
％に対して、硼砂２〜６％溶液外掛３〜６重量
％、MgCl2飽和溶液外掛２〜６重量％添加混合、
所望形状に成形した、塩基性製鋼炉用複合造滓
剤。1 10mm of basic brick waste used in a basic steelmaking furnace
The following: 60-80% by weight of the pulverized material, 5-10% by weight each of clay, iron oxide, slaked lime, and carbon, based on a total of 100% by weight, a 2-6% solution of borax, an outer layer of 3-6% by weight, and a saturated MgCl2 solution. Addition of 2 to 6% by weight of sokokake,
A composite slag forming agent for basic steelmaking furnaces that is molded into the desired shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57089939A JPS591610A (en) | 1982-05-28 | 1982-05-28 | Composite slag forming agent for basic steel making furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57089939A JPS591610A (en) | 1982-05-28 | 1982-05-28 | Composite slag forming agent for basic steel making furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS591610A JPS591610A (en) | 1984-01-07 |
| JPS621446B2 true JPS621446B2 (en) | 1987-01-13 |
Family
ID=13984664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57089939A Granted JPS591610A (en) | 1982-05-28 | 1982-05-28 | Composite slag forming agent for basic steel making furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591610A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3726599B2 (en) * | 1999-11-24 | 2005-12-14 | Ｊｆｅスチール株式会社 | Method for refining molten steel using refractory scrap containing carbon |
| JP4581751B2 (en) * | 2005-03-07 | 2010-11-17 | Ｊｆｅスチール株式会社 | Prevention of dust from hot metal transport container |
| JP5347317B2 (en) * | 2008-04-28 | 2013-11-20 | Ｊｆｅスチール株式会社 | How to reuse used tundish refractories |
| JP5391690B2 (en) * | 2008-12-26 | 2014-01-15 | 新日鐵住金株式会社 | Slag regulator |
| CN101892342B (en) * | 2010-07-22 | 2012-04-25 | 新兴铸管股份有限公司 | Slagging method for converter |
| CN109182640B (en) * | 2018-09-20 | 2020-06-16 | 德龙钢铁有限公司 | Method for reducing carbon oxygen deposit at smelting end point of converter |
| CN109750210B (en) * | 2018-12-29 | 2020-09-22 | 广西长城机械股份有限公司 | Production method of low-oxygen high-hydrogen-content manganese steel |
| RU2746198C1 (en) * | 2020-04-12 | 2021-04-08 | Акционерное общество "Завод алюминиевых сплавов" | Alumina mixture for liquefaction of metallurgical slag |
-
1982
- 1982-05-28 JP JP57089939A patent/JPS591610A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS591610A (en) | 1984-01-07 |
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