JPH02232313A - Dephosphorizing agent for molten steel - Google Patents
Dephosphorizing agent for molten steelInfo
- Publication number
- JPH02232313A JPH02232313A JP1052086A JP5208689A JPH02232313A JP H02232313 A JPH02232313 A JP H02232313A JP 1052086 A JP1052086 A JP 1052086A JP 5208689 A JP5208689 A JP 5208689A JP H02232313 A JPH02232313 A JP H02232313A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- dephosphorizing agent
- compsn
- weight
- dephosphorizing
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 12
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 239000002893 slag Substances 0.000 abstract description 13
- 239000011819 refractory material Substances 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052681 coesite Inorganic materials 0.000 abstract description 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 3
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052682 stishovite Inorganic materials 0.000 abstract description 3
- 229910052905 tridymite Inorganic materials 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 description 10
- 239000011651 chromium Substances 0.000 description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 239000007800 oxidant agent Substances 0.000 description 9
- 230000001590 oxidative effect Effects 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 102200021395 rs3739168 Human genes 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は溶鋼の精錬ＩＣ使用すｂ脱りん剤でろって，と
くに酸化脱りん法に供せられる脱りん剤に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a dephosphorizing agent used in an IC for refining molten steel, and particularly to a dephosphorizing agent used in an oxidative dephosphorizing method.
（従来の技術）
鋼に対してクんは一般に有害元素でろって，機械的性質
，溶接性，鍛接性に悪影響を及ぼす。また，とくに含ク
ロム鋼におっては応力腐食割れの原因ともなるものであ
る。(Prior art) Metals are generally harmful elements to steel, and have a negative effect on mechanical properties, weldability, and forge weldability. It also causes stress corrosion cracking, especially in chromium-containing steel.
近年．鋼材に対する高品質化への要求が高まるにともな
って，そのより以上の低りん化が強く求められ，溶鋼の
精練における脱りん法も従来のＣａＯ系スラグによる酸
化精錬に対して多くの技術的改良が加えられている。recent years. As the demand for higher quality steel materials increases, there is a strong demand for even lower phosphorus, and many technological improvements have been made to the dephosphorization method in molten steel refining compared to the conventional oxidation refining using CaO-based slag. has been added.
溶鋼の脱りん処理にあたり，脱りん剤として種々のフラ
ックスが提唱されているが，脱りん反応の形態によって
還元脱りん剤と酸化脱りん剤とに区分される。また．酸
化脱りん剤に対しては，とくに含クロム鋼の場合にクロ
ムの選択酸化にょる減耗を避けて有効に脱りん反応を進
行させるものでおることが主眼とされ九。Various fluxes have been proposed as dephosphorizing agents for dephosphorizing molten steel, but they are classified into reductive dephosphorizing agents and oxidizing dephosphorizing agents depending on the form of the dephosphorizing reaction. Also. Regarding oxidative dephosphorizing agents, the main aim is to avoid the depletion of chromium due to selective oxidation, especially in the case of chromium-containing steel, and to effectively promote the dephosphorizing reaction9.
従来提唱されている脱りん剤をあげれば次のとおりであ
る。The dephosphorizing agents that have been proposed so far are as follows.
（１） 還元脱りん剤：Ｃａ−ＣａＰ２系， ＣａＣ
２−ＣａＦ２系。(1) Reduction dephosphorizing agent: Ca-CaP2 system, CaC
2-CaF2 system.
（２） 酸化脱りん剤： （Ｃａｂ， Ｂａｄ， Ｎ
ａ２ＣＯ３，Ｌｉ２ＣＯ３）一ハロゲン化物系。(2) Oxidative dephosphorizer: (Cab, Bad, N
a2CO3, Li2CO3) monohalide system.
（発明が解決しようとする課題）
前項にあげた従来の脱リん剤については、それぞれ次の
ような課題が指摘される。(Problems to be Solved by the Invention) The following problems have been pointed out with respect to the conventional dephosphorizing agents listed in the previous section.
（１）還元脱りん剤：脱りん後スラグの無害化処理を必
要とする。さらに，Ｃａ系においてはＣａの蒸発による
効率低下，もしくはＥＡＲを必要とすることによる高コ
スト化が１ま７’（ＣａＣ２系においては耐火物の損傷
がめげられる。(1) Reduction dephosphorizing agent: Requires detoxifying treatment of slag after dephosphorization. Furthermore, in the Ca system, efficiency decreases due to evaporation of Ca or increases in cost due to the need for EAR (in the CaC2 system, damage to the refractory is caused).
（２） 酸化脱りん剤：ハロゲ／化物による耐火物の
損傷．還境汚染のほか， ＢａＯ，ＬＩＣＯ３系におけ
る高コス｝化， Ｎａ２ＣＯｌ系におけるヒュームの発
生があげられる。(2) Oxidative dephosphorizer: Damage to refractories due to halogens/compounds. In addition to environmental pollution, the increase in cost in BaO and LICO3 systems and the generation of fumes in Na2COl systems are also cited.
これらの課題に対して，本発明は脱りん後スラグの無害
化処理を必要とせず，耐火物の損傷，環境汚染．高コス
ト化を解決するものとして新規な脱りん剤を提供するも
のである。In order to solve these problems, the present invention eliminates the need to detoxify the slag after dephosphorization, and reduces the risk of damage to refractories and environmental pollution. The present invention provides a new dephosphorizing agent to solve the problem of high costs.
（課題を解決するための手段）
本発明は，カルシウムアルミネートと酸化鉄より成る組
成物であって，カルシウムアルミネートもしくは組成物
全体がブリメルトされ，かつＣａＯ３０−５０重量％，
ＡｌｚＯｘ ２５−４５重量チ．ＦｅＯ＋Ｆｅ２０３
１ Ｑ − ３ ０重量％， Ｓｉ０２ ３重量チ以
下，残部がその他の避けられない不純物よｐ成ることを
特徴とする溶鋼の脱りん剤を第一発明とするものである
。(Means for Solving the Problems) The present invention provides a composition comprising calcium aluminate and iron oxide, in which the calcium aluminate or the entire composition is brimelted, and 30-50% by weight of CaO,
AlzOx 25-45 weight chi. FeO+Fe203
The first invention is a dephosphorizing agent for molten steel, characterized in that it consists of 0% by weight of 1Q-3, 3% by weight of Si02 or less, and the balance consisting of other unavoidable impurities.
しかして．第二発明として前記の酸化鉄に代えて酸化ク
Ｏｌｈとし， ＦｅＯ＋Ｆｅ２０３ １ ０ − ３
０重量％ｉて代えてＣｒ２０３ ５ − １ ５重量
チ及びＦｅＯ＋Ｆｅ２０３０１〜１０重量チとすること
を特徴とする溶鋼の脱りん剤を提供するものである。However. As a second invention, in place of the above-mentioned iron oxide, oxidized oxide Olh is used, FeO+Fe203 1 0 - 3
The present invention provides a dephosphorizing agent for molten steel characterized in that 0% by weight i is replaced with 5% by weight of Cr203 and 1 to 10% by weight of FeO+Fe2030.
さらに，第三発明として，前記のブリメルトに代えて焼
結されることを特徴とする溶鋼の脱りん剤を提供するも
のである。Furthermore, as a third invention, there is provided a dephosphorizing agent for molten steel, characterized in that it is sintered instead of the Brimelt described above.
ここに，カルシウムアルミネートは１２ｃａｏ・７Ａｌ
２ＣＮの共晶組成を有し， ＣａＯ−）Ｊ２０コ系では
最低の融点（約Ｌ３８５℃》をもつものである。Here, calcium aluminate is 12cao・7Al
It has a eutectic composition of 2CN and has the lowest melting point (approximately 385°C) in the CaO-)J20 series.
ＣａＯ系フラックスに対しては脱りん反応を促進させる
ために，融点降下・滓化促進剤としてＣａＦ２が有効で
あり多用されているが，反面，耐火物を損傷し，環境を
汚染する要因ともなるので本発明ではＣａＦ２に代えて
人ｌ２０３を選択した。これは，ＡｌｔｏｓがＣａＯ
ｉ’ｉｌ：対して十分な融点降下・滓化促進能を有し．
脱りん反応の促進にＭ用であるとの知見による。For CaO-based fluxes, CaF2 is effective and frequently used as a melting point lowering and slag accelerator to promote the dephosphorization reaction, but on the other hand, it can damage refractories and pollute the environment. Therefore, in the present invention, human 1203 was selected instead of CaF2. This means that Altos is CaO
i'il: has sufficient ability to lower the melting point and promote sludge formation.
This is based on the knowledge that M is used to promote the dephosphorization reaction.
また．ブリメルト品とし友のは組成的に均質なものとし
，ひいては溶鋼との接触において溶融・滓化を容易にす
るためである。プリメルトについては．カルシウムアル
ミネートのみをその対象とするも，酸化鉄もしくは酸化
クロムとの組成物全体とするもいずれでもよい。Also. Brimelt products are made to be homogeneous in composition, which in turn facilitates melting and slag formation upon contact with molten steel. Regarding Primelt. The target may be either only calcium aluminate or the entire composition with iron oxide or chromium oxide.
第一発明における酸化鉄，第二発明における酸化クロム
はともに酸化脱りんに際して酸化剤として作用せしめる
ものである。酸化鉄として便用し得るのは，製鉄工場か
ら容易に入手できるミルスケールが好適でるり，他に弁
柄も適品である。酸化クロムとしてはクロマイトサント
−クロム鉱石などを使用する。クロマイトサンドについ
ては，鋳造工場で使用後の廃砂を利用するのもよい。Both the iron oxide in the first invention and the chromium oxide in the second invention act as an oxidizing agent during oxidative dephosphorization. Mill scale, which can be easily obtained from iron factories, is suitable as iron oxide, and Bengara is also suitable. As the chromium oxide, chromite sant-chromium ore is used. As for chromite sand, it is also a good idea to use waste sand from a foundry.
ここにおいて，酸化鉄は含クロム鋼に対してはりんより
もクロムの優先的酸化剤として作用するので．この場合
は酸化クロムを用いるものとする。Here, iron oxide acts as a preferential oxidizing agent for chromium rather than phosphorus for chromium-containing steel. In this case, chromium oxide shall be used.
すなわち，本発明の脱りん剤について，第二発明は含ク
ロム鋼用とし，第一発明はその他の炭素鋼，合金鋼用と
するものである。That is, regarding the dephosphorizing agent of the present invention, the second invention is used for chromium-containing steel, and the first invention is used for other carbon steels and alloy steels.
５〜１５重量チであって，この範囲を超えるときは反応
過多となり，未満では過少となってともに本発明の目的
を達し得ない。なお．第二発明におけるＦｅＯ＋Ｆｅ２
０ｘは酸化剤原料から混入するもので避けられない成分
である。If the amount is 5 to 15% by weight, if it exceeds this range, the reaction will be excessive, and if it is less than this, the reaction will be too small, and the object of the present invention cannot be achieved. In addition. FeO+Fe2 in the second invention
0x is an unavoidable component that is mixed in from the oxidizing agent raw material.
Ｓｉ０２も配合原料からの混入成分であるが．酸性成分
であるから滓の塩基度低下による脱りん反応の阻害を防
止する几め３重量チ以下とすることが必要でらる。Si02 is also a mixed component from the blended raw materials. Since it is an acidic component, it is necessary to reduce the amount to 3% by weight or less to prevent inhibition of the dephosphorization reaction due to a decrease in the basicity of the slag.
ＣａＯとＡＩ！２ ０ ３の特定範囲については，カル
シウムアルミネートにおいて基本的なＣ ａ Ｏ／Ａ．
．ｌ ２ ０ ３の組成比は１／１であるから，プリメ
ルトもしくは焼結における原料歩留．酸化剤原料からの
ビノクアップを考慮するとき．適量範囲はＣａＯ ３
０〜５０重量％ ， ＡＪ２０３ ２ ５〜４５重量チ
となる。CaO and AI! For the specific range of 203, the basic C a O/A.
．． Since the composition ratio of l203 is 1/1, the raw material yield in premelt or sintering is low. When considering vinyl-up from oxidizer raw materials. The appropriate amount range is CaO 3
0 to 50% by weight, AJ203 2 5 to 45% by weight.
この範囲を超えるときも，また未満のときも．ともに融
点が上昇して脱りんの反応速度が低下するから好ましく
ない。Both above and below this range. Both are undesirable because the melting point increases and the dephosphorization reaction rate decreases.
なお，第三発明において焼結は融点直下で行われ，第一
，第二発明によるものに準じて本発明の目的達成のため
に使用される。In addition, in the third invention, sintering is performed just below the melting point, and is used to achieve the object of the present invention in the same manner as in the first and second inventions.
（作 用）
本発明による脱りん剤は，ブリメルト品であるカルシウ
ムアルミネートと酸化剤とを適当粒度に砕粒・混合し次
ものとして．炉中．炉外の別なく溶鋼の脱りん精錬に供
せられる。(Function) The dephosphorizing agent according to the present invention is prepared by crushing and mixing calcium aluminate, which is a Brimelt product, and an oxidizing agent to an appropriate particle size. Inside the furnace. It is used for dephosphorization of molten steel, regardless of whether it is outside the furnace.
従来のＣａＯ系脱りん剤では．酸化剤を含むものにあっ
てはスラグの固化を避け，溶化を促進するものとしてハ
ロゲン化物を含むものが知られているが，本発明の脱り
ん剤はこれをカルシウムアルミ不−トとすることにより
・・ロゲン化物を全く含まないものとしたのでちる。With conventional CaO-based dephosphorizing agents. Among those containing oxidizing agents, those containing halides are known to avoid solidification of slag and promote solubilization, but the dephosphorizing agent of the present invention uses calcium aluminum inert instead of halides. As a result, it contains no rogens at all.
すなわち，本発明によれば，脱りん剤は速かに滓化して
酸化剤による鋼浴中ジんの酸化を進行させてＰ２０５と
し．さらにＣａＯとの反応によりきわめて安定な３Ｃａ
Ｏ−Ｐ２０５を形成してスラグとともに除去し得るもの
となるのである。That is, according to the present invention, the dephosphorizing agent quickly turns into slag, and the oxidizing agent progresses the oxidation of the slag in the steel bath, resulting in P205. Furthermore, 3Ca is extremely stable due to the reaction with CaO.
This allows O-P205 to be formed and removed together with the slag.
酸化剤として用いる酸化鉄はＦｅＯの供給源であるから
，含クロム鋼Ｋ−あってはりんよクもクロムを優先的に
酸化することとな，ｂ．ＬＡがって，含クロム鋼に対し
ては酸化クロムを酸化剤としたことは既述のとおりであ
る。Since iron oxide used as an oxidizing agent is a source of FeO, chromium-containing steel K- and Rin-yoku also preferentially oxidize chromium, b. As mentioned above, chromium oxide was used as the oxidizing agent for chromium-containing steel in LA.
なお，本発明の脱９ん剤の関与する脱りん反応式を次に
示す。The dephosphorization reaction formula involving the dephosphorization agent of the present invention is shown below.
２ヱ ＋ ５０ ＝ Ｐ２０Ｓ
３ （ＣａＯ）＋ ２Ｅ ＋ ５Ｑ−＋（Ｃａ ｓＰＪ
）＋ ４Ｃ４ ＝ Ｃａ ３（ＰＯｉ ）ｉ（実施例）
本発明の実施例を次に示す。2ヱ + 50 = P20S 3 (CaO) + 2E + 5Q-+ (Ca sPJ
)+4C4=Ca3(POi)i (Example) Examples of the present invention are shown below.
実施例１
等量の石灰石とボーキサイトを溶解炉に装入し１５００
℃以上の温度でカルシウムアルミネートを溶製した。こ
れを３』以下の粒径となるように粉砕したものに対して
．同様粒度に調整したミルスケールを混合比４：１とな
るように加えて十分に混合し，第１表に示す組成の脱り
ん剤体）を得た。Example 1 Equal amounts of limestone and bauxite were charged into a melting furnace and the melting temperature was 1500.
Calcium aluminate was melted at temperatures above ℃. This is crushed to a particle size of 3'' or less. Mill scale adjusted to the same particle size was added at a mixing ratio of 4:1 and thoroughly mixed to obtain a dephosphorizing agent having the composition shown in Table 1.
これを高周波誘導炉で溶解し７ｔ−ｌｉｏｎの０．０５
チＣ鋼に１０〜散布添加して脱りん処理を行った。This was melted in a high frequency induction furnace to produce 7t-lion of 0.05
A dephosphorization treatment was carried out by adding 10 to 10% of the mixture to C steel.
添加時の鋼浴温度は１６００℃であク．投入後友。The steel bath temperature at the time of addition was 1600℃. Friend after input.
実施例２
これ七粒径３Ｎ１以下に粉砕後電弧炉で溶解した３ｏｔ
ｏｎの３ ％ Ｃｒ−１％Ｃ鋼浴に２１０Ｋｆｔ炉中投
入し，脱りん処理を行った。投入時の鋼浴温度はＬ５０
０℃であり．鋼浴中のりん濃度に処理前の第 １ 表（
重量チ）
その他の実施の態様として，本発明の脱りん剤をキャリ
アカスな介して浴中に吹込んだり，コアードワイヤの形
態で浸漬処理してもよい。Example 2 3 oz of this was crushed to a particle size of 3N1 or less and then melted in an electric arc furnace.
The sample was placed in a 210 Kft furnace in a 3% Cr-1% C steel bath for dephosphorization. The steel bath temperature at the time of charging is L50.
It is 0℃. Table 1 shows the phosphorus concentration in the steel bath before treatment (
In other embodiments, the dephosphorizing agent of the present invention may be blown into the bath through a carrier cassette, or may be immersed in the form of a cored wire.
（発明の効果）
本発明の脱りん剤は次のような効果をも友らすものでち
る。(Effects of the Invention) The dephosphorizing agent of the present invention also has the following effects.
（１１ ブリメルトもしくは焼結されたカルシウムア
ルミネートが主成分であって，鋼よりも低融点であるか
ら脱りんの反応効率が良好でるる。(11) The main component is brimelt or sintered calcium aluminate, which has a lower melting point than steel, so the dephosphorization reaction efficiency is good.
ｉ２ｌ Ｃ ａＯ−Ａｌ ２ ０ ３系でめる九め，
スラグの塩基度調整が容易であり１脱りん反応の促進に
有効でおる。i2l CaO-Al 2 0 3 system,
It is easy to adjust the basicity of the slag and is effective in promoting the dephosphorization reaction.
（３） ハロゲン化物を含まないため．それによる耐
火物の損傷と環境汚染を避けられる。(3) Because it does not contain halides. This can avoid damage to refractories and environmental pollution.
（４）鋼浴添加時に発煙，発塵，臭気カスの発生がない
。(4) No smoke, dust, or odor residue is generated when adding steel to the bath.
（５）生成スラグは無害化処理を必要としない。(5) The generated slag does not require detoxification treatment.
（６）処理反応時の吸熱が小さいためと一トロスが少な
い。(6) Because the endotherm during the treatment reaction is small, the amount of loss is small.
（力 吸湿性ではないｋめ保管管理が容易である。(Since it is not hygroscopic, storage management is easy.
（８）脱りん処理を低コスト化し得る。(8) The cost of dephosphorization treatment can be reduced.
以上より本発明の脱りん剤は，従来の課題を解決するも
のとして高品質の低りん鋼の製造に大いに寄与するもの
である。As described above, the dephosphorizing agent of the present invention solves the conventional problems and greatly contributes to the production of high quality low phosphorus steel.
特許出願人 太洋技研工業株式会社Patent applicant Taiyo Giken Kogyo Co., Ltd.
Claims (1)
あって、カルシウムアルミネートもしくは組成物全体が
プリメルトされ、かつＣａＯ３０〜５０重量％、Ａｌ＿
２Ｏ＿３２５〜４５重量％、ＦｅＯ＋Ｆｅ＿２Ｏ＿３１
０〜３０重量％、ＳｉＯ＿２３重量％以下、残部がその
他の避けられない不純物より成ることを特徴とする溶鋼
の脱りん剤。 ２、請求項１記載の溶鋼の脱りん剤において、酸化鉄に
代えて酸化クロムとし、ＦｅＯ＋Ｆｅ＿２Ｏ＿３１０〜
３０重量％に代えてＣｒ＿２Ｏ＿３５〜１５重量％及び
ＦｅＯ＋Ｆｅ＿２Ｏ＿３０．１〜１０重量％とすること
を特徴とする溶鋼の脱りん剤 ３、請求項１又は２記載の溶鋼の脱りん剤において、プ
リメルトに代えて焼結されることを特徴とする溶鋼の脱
りん剤。[Claims] 1. A composition consisting of calcium aluminate and iron oxide, wherein the calcium aluminate or the entire composition is premelted, and 30 to 50% by weight of CaO, Al_
2O_325-45% by weight, FeO+Fe_2O_31
A dephosphorizing agent for molten steel, characterized in that it contains 0 to 30% by weight, SiO_23% by weight or less, and the remainder consists of other unavoidable impurities. 2. In the dephosphorizing agent for molten steel according to claim 1, chromium oxide is used instead of iron oxide, and FeO+Fe_2O_310~
A molten steel dephosphorizing agent 3 characterized in that Cr_2O_35 to 15% by weight and FeO+Fe_2O_30.1 to 10% by weight are used instead of 30% by weight, in the molten steel dephosphorizing agent according to claim 1 or 2, in place of premelt. A dephosphorizing agent for molten steel, which is characterized by being sintered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052086A JPH02232313A (en) | 1989-03-06 | 1989-03-06 | Dephosphorizing agent for molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052086A JPH02232313A (en) | 1989-03-06 | 1989-03-06 | Dephosphorizing agent for molten steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02232313A true JPH02232313A (en) | 1990-09-14 |
Family
ID=12905018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1052086A Pending JPH02232313A (en) | 1989-03-06 | 1989-03-06 | Dephosphorizing agent for molten steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02232313A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100415925B1 (en) * | 1998-12-30 | 2004-03-26 | 주식회사 포스코 | Calcium Aluminate Additives |
| CN103060522A (en) * | 2013-02-08 | 2013-04-24 | 武钢集团昆明钢铁股份有限公司 | Slag forming agent for dephosphorization of medium-high-phosphorus semisteel and preparation method of slag forming agent |
| CN103060527A (en) * | 2013-02-04 | 2013-04-24 | 山西太钢不锈钢股份有限公司 | Slagging method of axle steel LF (Ladle Refining) furnace |
| JP2014031562A (en) * | 2012-08-06 | 2014-02-20 | Nippon Steel & Sumitomo Metal | Dephosphorization processing method of hot pig iron |
| JP2014037570A (en) * | 2012-08-14 | 2014-02-27 | Nippon Steel & Sumitomo Metal | High speed blowing method for converter |
| CN104451033A (en) * | 2015-01-06 | 2015-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel desulfuration dephosphorization agents and preparing method and application thereof |
| CN104451034A (en) * | 2015-01-06 | 2015-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel desulfuration dephosphorization agent and preparing method and application thereof |
| CN104480253A (en) * | 2015-01-06 | 2015-04-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Dephosphorization and desulfurization agent for semi-steel and preparation method and application thereof |
| WO2017119392A1 (en) * | 2016-01-05 | 2017-07-13 | 新日鐵住金株式会社 | Molten iron dephosphorizing agent, refining agent, and dephosphorization method |
-
1989
- 1989-03-06 JP JP1052086A patent/JPH02232313A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100415925B1 (en) * | 1998-12-30 | 2004-03-26 | 주식회사 포스코 | Calcium Aluminate Additives |
| JP2014031562A (en) * | 2012-08-06 | 2014-02-20 | Nippon Steel & Sumitomo Metal | Dephosphorization processing method of hot pig iron |
| JP2014037570A (en) * | 2012-08-14 | 2014-02-27 | Nippon Steel & Sumitomo Metal | High speed blowing method for converter |
| CN103060527A (en) * | 2013-02-04 | 2013-04-24 | 山西太钢不锈钢股份有限公司 | Slagging method of axle steel LF (Ladle Refining) furnace |
| CN103060522A (en) * | 2013-02-08 | 2013-04-24 | 武钢集团昆明钢铁股份有限公司 | Slag forming agent for dephosphorization of medium-high-phosphorus semisteel and preparation method of slag forming agent |
| CN104451033A (en) * | 2015-01-06 | 2015-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel desulfuration dephosphorization agents and preparing method and application thereof |
| CN104451034A (en) * | 2015-01-06 | 2015-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel desulfuration dephosphorization agent and preparing method and application thereof |
| CN104480253A (en) * | 2015-01-06 | 2015-04-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Dephosphorization and desulfurization agent for semi-steel and preparation method and application thereof |
| WO2017119392A1 (en) * | 2016-01-05 | 2017-07-13 | 新日鐵住金株式会社 | Molten iron dephosphorizing agent, refining agent, and dephosphorization method |
| CN107849625A (en) * | 2016-01-05 | 2018-03-27 | 新日铁住金株式会社 | Dephosphorising agent, refining agent and the dephosphorization method of molten iron |
| JPWO2017119392A1 (en) * | 2016-01-05 | 2018-04-05 | 新日鐵住金株式会社 | Molten iron dephosphorizing agent, refining agent and dephosphorizing method |
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