JPS61194107A - Method for effectively utilizing quick lime in steel manufacturing process - Google Patents
Method for effectively utilizing quick lime in steel manufacturing processInfo
- Publication number
- JPS61194107A JPS61194107A JP60034508A JP3450885A JPS61194107A JP S61194107 A JPS61194107 A JP S61194107A JP 60034508 A JP60034508 A JP 60034508A JP 3450885 A JP3450885 A JP 3450885A JP S61194107 A JPS61194107 A JP S61194107A
- Authority
- JP
- Japan
- Prior art keywords
- ladle
- slag
- steel
- molten steel
- quicklime
- 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.)
- Granted
Links
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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Details (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
鋼の精錬炉たとえば転炉における精錬操業中に脱りん・
脱硫用の副原料として生石灰が精錬炉に添加されるが、
この生石灰のより有効な利用に関してこの明細書では、
製鋼プロセスを通した活用を試み、新たな有用化を見出
した開発研究の成果を述べる。[Detailed Description of the Invention] (Industrial Application Field) Dephosphorization and
Quicklime is added to the smelting furnace as an auxiliary material for desulfurization.
In this specification, regarding the more effective use of quicklime,
We will describe the results of our research and development efforts that have led to the discovery of new uses through the steelmaking process.
（従来の技術）
ところで上記の精錬炉における生石灰の添加によって、
いわゆる精錬スラグが生成する。(Prior art) By the way, by adding quicklime in the above-mentioned smelting furnace,
So-called smelting slag is produced.
しかるに製鋼プロセスにおいて、出鋼工程における精錬
スラグの取鍋への流出は、復りんの不利や脱酸剤小止り
の低下をもたらすため、極力流入を抑える技術開発がな
されている。However, in the steelmaking process, the outflow of refined slag into the ladle during the steel tapping process causes disadvantages in rejuvenation and a decrease in deoxidizing agent retention, so technology has been developed to suppress the inflow as much as possible.
例えば取鍋に流入するスラグの量を少なくする方法とし
て、ノロ止めボールを転炉に投入すること（特開昭４８
−１１２０８号公報）や出鋼口にスライディングゲート
等の溶鋼流開閉装置を設けること（特開昭５３−１４１
１０９号、特開昭４９−９１００６号公報など）は知ら
れているが、これらに伴うコストアンプが避けられず、
またスラグ流出を完全には防止できない。For example, as a method to reduce the amount of slag flowing into the ladle, a slag stopper ball is introduced into the converter (Japanese Patent Laid-Open No. 48
-11208 Publication) and providing a molten steel flow opening/closing device such as a sliding gate at the tapping port (Japanese Unexamined Patent Publication No. 53-141)
109, Japanese Unexamined Patent Publication No. 49-91006, etc.), but the cost increase associated with these cannot be avoided,
Furthermore, the outflow of slag cannot be completely prevented.
何れにせよ取鍋スラグの減少は、復りん防止に有効では
あっても、その反面取鍋内溶鋼の保温効果が低減するた
め特開昭４８−９２２１４号公報に開示されているよう
に、別途保温材を取鍋に添加しなければならないという
デメリットを伴う場合があり、この点についての生石灰
の利用に関する報文の例は見当たらない。In any case, although reducing the amount of ladle slag is effective in preventing reversion, it also reduces the heat retention effect of the molten steel in the ladle. This may have the disadvantage of requiring a heat insulating material to be added to the ladle, and there are no examples of reports regarding the use of quicklime in this regard.
（発明が解決しようとする問題点）
精錬スラグの不可避な取鍋的流入に基づく復りんおよび
脱酸剤奏上り低下の防止と、該流入の抑制による取鍋内
溶鋼の温度低下を、生石灰の取鍋への添加によって適切
に防止するのみならず、この生石灰を付加した取鍋スラ
グの製鋼副原料としての活用にて滓化促進に寄与させる
ことが、この発明の着想上の基本である。(Problems to be Solved by the Invention) It is possible to prevent a decrease in rephosphorization and deoxidizing agent performance due to the inevitable inflow of refined slag into the ladle, and to reduce the temperature of molten steel in the ladle by suppressing the inflow. The basic concept of this invention is to not only appropriately prevent quicklime by adding it to the ladle, but also to contribute to the promotion of slag formation by utilizing the ladle slag to which quicklime has been added as an auxiliary raw material for steelmaking.
（問題点をか解決するための手段）
この発明は精錬炉から取鍋への出鋼に際して溶鋼トン当
り１〜１０ｋｇの生石灰を取鍋内に添加して復りん防止
と溶鋼保熱に供すること、該取鍋から溶鋼を払い出した
後、上記生石灰を付加した取鍋内スラグを冷却、破砕お
よび磁選処理して脱りん脱硫用の副原料に再生し、この
再生副原料を精錬炉に添加して該精錬炉における滓化促
進に供するごとの結合を特徴とする、製鋼プロセスにお
ける生石灰の有効利用法である。(Means for Solving the Problems) This invention involves adding 1 to 10 kg of quicklime per ton of molten steel into the ladle when tapping the steel from the refining furnace to the ladle to prevent reversion and to retain heat of the molten steel. After discharging the molten steel from the ladle, the slag in the ladle to which the quicklime has been added is cooled, crushed, and subjected to magnetic separation treatment to be recycled into an auxiliary raw material for dephosphorization and desulfurization, and this recycled auxiliary raw material is added to a smelting furnace. This is an effective method of utilizing quicklime in the steelmaking process, which is characterized by its combination to promote slag formation in the smelting furnace.
発明者らは、出鋼に際して、取鍋に生石灰を添加して、
復りんならびに脱酸剤の小止り及び溶鋼温度の低下を防
止すること、そしてこの生石灰添加で生成した取鍋スラ
グを溶鋼の払出し後、精錬炉に添加することを試みた結
果、生石灰の取鍋添加に伴うデメリットを補ってあまり
あることが見出された。すなわち、取鍋に添加した生石
灰はプリメル１−の状態で、かつ脱酸生成物（ＡＮｚｏ
ｌ。The inventors added quicklime to the ladle when tapping steel,
As a result of trying to prevent the stagnation of rephosphorization and deoxidizing agent and the drop in molten steel temperature, and adding the ladle slag produced by adding quicklime to the smelting furnace after discharging the molten steel, the quicklime ladle It was found that the disadvantages associated with addition were more than compensated for. That is, the quicklime added to the ladle is in the state of primel 1-, and the deoxidized product (ANzo
l.
ＳｉＯ□、 ＭｎＯ等）や精錬スラグとブレンドされた
複合スラグとなるため、精錬炉における滓化促進に著し
く寄りしホタル石等の滓化促進剤を減少できるとともに
、精錬炉における冷却能も小さいため、小止りの向上な
ど等のメリットも得られることである。Since it becomes a composite slag that is blended with SiO□, MnO, etc.) and slag, it significantly promotes slag formation in the smelting furnace, reducing the amount of slag accelerators such as fluorite, and has a small cooling capacity in the smelting furnace. , improved short stop, etc., can also be obtained.
（作 用）
さて取鍋への生石灰の添加は、精錬スラグから溶鋼への
復りん防止、取鍋における脱酸剤の小止りの向上、精錬
炉からの出鋼温度降下の防止の而から、出鋼の初期、少
なくとも合金鉄の添加より早くしなくてはならない。(Function) The addition of quicklime to the ladle prevents reconversion of slag from smelting to molten steel, improves the amount of deoxidizing agent in the ladle, and prevents a drop in the temperature of steel being tapped from the smelting furnace. It must be done at the beginning of tapping, at least earlier than the addition of ferroalloy.
これにより、出鋼開始時に取鍋に流入したスラグを固化
するとともに取鍋全面をおおわせる。As a result, the slag that has flowed into the ladle at the start of tapping is solidified and covers the entire surface of the ladle.
生石灰の添加は取鍋に流入する精錬スラグ量や、鋼の脱
酸状態によっても異なるが、例えば粒度１０〜３Ｑｍｍ
のものが、溶鋼トン当り１〜１０ｋｇ’の割合いで適合
する。The addition of quicklime varies depending on the amount of smelting slag flowing into the ladle and the deoxidation state of the steel, but for example, it is
1 to 10 kg' per ton of molten steel.
リムド鋼では１ｋｇ’／溶鋼ｔで十分に効果を表すが、
キルト鋼では５〜８ｋｇ’／溶鋼りが必要である。Rimmed steel is sufficiently effective at 1 kg'/t of molten steel, but
Quilt steel requires 5 to 8 kg'/molten steel.
なおｌ０ｋｇ’ ／溶鋼ｔを越えるような過剰添加では
、スラグが過度に硬化し、その後の合金鉄の添加などに
支障をきたす。Incidentally, if excessive addition exceeds 10 kg'/t of molten steel, the slag will harden excessively, which will hinder the subsequent addition of ferroalloy.
とくにキルト鋼にあっては、出鋼の終了直前にも生石灰
を追加添加して、スラグの固化を促進することが復りん
の更なる減少に有効である。Particularly in the case of quilt steel, it is effective to further reduce rephosphorization by adding quicklime just before the end of tapping to promote solidification of the slag.
表−１は転炉から出鋼される、鋼種ごとの代表的化学組
成（％）を示している。Table 1 shows the typical chemical composition (%) of each type of steel extracted from a converter.
表−１に示す化学組成の溶鋼に対し、取鍋でたとえば粒
度１０〜３０ｍ−程度の生石灰を投入する。Quicklime having a particle size of about 10 to 30 m is charged into molten steel having the chemical composition shown in Table 1 using a ladle.
このように溶鋼を処理すると生石灰は該溶鋼とともに取
鍋に流入した精錬スラグ中に溶解し、流入スラグに起因
する溶鋼の復りんを妨げる取鍋スラグを性成する。When the molten steel is treated in this way, the quicklime is dissolved in the refining slag that flows into the ladle together with the molten steel, forming ladle slag that prevents the molten steel from returning due to the flowing slag.
表−２には、このようにして生成した取鍋スラ グの組
成と生石灰添加量（ｋｇ／を溶鋼）を、鋼種ごとに例示
したかつ、りん、いおう含有量が低く、まだ精錬能力を
有していることがわかったのである。Table 2 shows the composition of the ladle slag produced in this way and the amount of quicklime added (kg/molten steel) for each type of steel. I found out that it was.
そこで、このような、復りん防止に使用した取鍋スラグ
を冷却、破砕及び磁力選鉱などの処理を行って、小粒を
除き粒径５龍以上のものを転炉などの精錬炉に投入し、
再生副原料として利用することに着目した。Therefore, the ladle slag used to prevent reversion is subjected to processing such as cooling, crushing, and magnetic beneficiation, and excluding small particles, those with a particle size of 5 or more are fed into a smelting furnace such as a converter.
We focused on using it as a recycled auxiliary raw material.
再生副原料の投入期間は、通常精錬における生石灰の添
加時期と同様で吹錬の初期（〜ｌ／３の期間）が有効で
ある。The period for adding the recycled auxiliary raw material is the same as the period for adding quicklime in normal refining, and the initial period of blowing (~1/3 period) is effective.
再生原料中に存在する＾ｌ ｚＯｓｔＭｎｏ、ｃａＯ，
５ｉＯｚの作用により容易に滓化するので、滓化の促進
に用いられたホタル石などの使用は不用となるか、ある
いは大巾に低減することができる。^l zOstMno, caO, present in the recycled raw material
Since it is easily slaged by the action of 5iOz, the use of fluorite, etc. used to promote slag formation becomes unnecessary or can be greatly reduced.
この様にして、出鋼時に取鍋に添加して副りん防止など
の多くの利点を果した生石灰を、取鍋内で脱酸生成物及
び精錬滓と混合したブリメルト状態を経た再生原料とに
して、精錬機能を果たせるとともに、これにより滓化が
促進される点を、滓化のための熱が減少することから冷
却能が減少する点から、ホタル石の減少や歩出りの向上
などの利点迄もう一度にわたって得ることができる。In this way, quicklime, which is added to the ladle during tapping and has many advantages such as preventing secondary phosphorus, is converted into a recycled raw material that has passed through the brimelt state mixed with deoxidized products and smelting slag in the ladle. In addition to fulfilling the refining function, this also promotes slag formation, since the heat for slag formation is reduced and the cooling capacity is reduced. The benefits can be gained over once again.
（°実施例）
２５０を上底吹き転炉（Ｋ −ＢＯＰ）での実施例を示
す。(°Example) An example will be shown in which 250 is used as a top-bottom blowing converter (K-BOP).
代表的鋼種である表−１に示す化学成分の取鍋内溶鋼に
ついて生石灰添加量と、温度降下、復りん量Ａ１歩止り
の関係等は第１図に示す通りであり、それぞれに効果が
見られる。Figure 1 shows the relationship between the amount of added quicklime, the temperature drop, and the rate of return phosphorus A1 for molten steel in a ladle with the chemical composition shown in Table 1, which is a typical steel type. It will be done.
まず、同図（ａ）はリムド鋼の生石灰添加量に対する復
りん量及び溶鋼温度降下量の関係を示し、生石灰１ｋｇ
’／を以上で復りんは十分防止でき、温度降下量も少な
いことがわかる。First, Figure (a) shows the relationship between the amount of quicklime added to the rimmed steel, the amount of rephosphorization and the amount of temperature drop in molten steel.
It can be seen that when ``/'' or more, reversion can be sufficiently prevented and the amount of temperature drop is also small.
同図（ｂ）は低次＾２キルド鋼の生石灰添加量に対する
復りん量、ＡＩ歩止りの関係を示し、生石灰２ｋｇ’／
を以上で復りんは防止でき、＾１歩止りも安定して向上
することがわかる。Figure (b) shows the relationship between the amount of quicklime added, the amount of rephosphorus, and the AI yield of low-order ^2 killed steel.
It can be seen that with the above, reversion can be prevented and the stopping rate can be stably improved.
同図（ｃ）は出鋼直後から連鋳タンディ・ノシュ最終ま
での溶鋼温度降下量と生石灰添加量との関係を、低次Ａ
１ギルド鋼の場合について示したものである。同図から
低次へ２キルド鋼においては、出鋼時の温度降下の低減
のみでなく、出鋼終了から、鋳込みの間の温度降下の低
減にも有効であり、取消スラグが改質され、熱放射の少
ない取鍋スラグになっていることが理解される。Figure (c) shows the relationship between the amount of molten steel temperature drop and the amount of quicklime added from immediately after tapping to the end of continuous casting tandy nosh.
This shows the case of 1-guild steel. From the same figure, for low-order two-killed steel, it is effective not only for reducing the temperature drop during tapping, but also for reducing the temperature drop from the end of tapping to the time of pouring. It is understood that the ladle slag emits less heat.
同図（ｄ）は高マンガン鋼の生石灰添加量に対する復り
ん呈、溶鋼温度降下量の関係を示しており、４ｋｇ’／
を以上で復りんの低減効果が得られ、溶鋼の温度降下防
止に顕著な効果を発揮することがわかる。Figure (d) shows the relationship between the amount of quicklime added to high manganese steel and the amount of molten steel temperature drop.
It can be seen that the effect of reducing reversion can be obtained in the above manner, and that it exhibits a remarkable effect in preventing the temperature drop of molten steel.
上述の結果により、リムド鋼では、出鋼初期段階に取鍋
溶鋼中に生石灰を２ｋｇ’／ｌ、低次Ａｊ７キルド鋼で
は出鋼初期に３ｋｇ’／を合金添加後１ｋｇ’／ｌの計
４ｋｇ’／ｌ、高マンガン鋼では出鋼初期に３ｋｇ’／
ｌ、合金鉄添加後３ｋｇ’／ｌを計６ｋｇ’／ｌを添加
して好結果を得ている。Based on the above results, for rimmed steel, 2 kg'/l of quicklime was added to the molten steel in the ladle at the initial stage of tapping, and for low-order Aj7 killed steel, 3 kg'/l was added to the alloy at the early stage of tapping, and 1 kg'/l was added for a total of 4 kg. '/l, for high manganese steel, 3kg'/l at the initial stage of tapping.
Good results have been obtained by adding 3 kg'/l after adding ferroalloy, for a total of 6 kg'/l.
しかしながら転炉出鋼孔の状態が悪くスラグの流出が特
に多い時は、増加する必要があるが、この場合には１０
ｋｇ／ｌまで増加する。However, when the condition of the converter tapping hole is poor and there is a particularly large amount of slag flowing out, it is necessary to increase the amount of slag.
kg/l.
これら各鋼種の取鍋スラグについてはすでに表−２に示
した通りである。The ladle slag for each of these steel types is already shown in Table 2.
次に上述のようにして出鋼汲取鍋内に流入した精錬スラ
グから溶鋼への復りん防止や溶鋼温度低下防止のため、
生石灰を添加することにより生成した取鍋スラグは例え
ば第２図に示す工程で処理する。Next, in order to prevent the refining slag that has flowed into the tapping ladle from returning to the molten steel as described above and to prevent the temperature of the molten steel from decreasing,
The ladle slag produced by adding quicklime is treated, for example, in the process shown in FIG.
すなわち、取鍋内の溶鋼を連続鋳造や造塊して鋳型に流
入したのち、取鍋内に残留した生成スラグをノロ鍋に排
出してバイレン工場へ搬送し、鉄球にて破砕、散水冷却
、地金選別の一次処理を行う。次にクラッシャによる破
砕、磁力選鉱による磁選の二次処理を受けた５重以上の
スラグは自然乾燥したのち再生副原料として上底吹転炉
の炉上バンガーに貯蔵する。That is, after the molten steel in the ladle is continuously cast or ingot-formed and flows into the mold, the produced slag remaining in the ladle is discharged into a slag ladle and transported to the Baylen factory, where it is crushed with iron balls and cooled with water spray. , performs the primary processing of metal sorting. Next, the 5-layer or more slag that has undergone secondary treatment of crushing with a crusher and magnetic separation using magnetic separation is naturally dried and then stored in the above-furnace banger of the top-bottom blowing converter as a recycled auxiliary raw material.
上・底吹転炉の吹錬初期に、通常の生石灰添加に準じて
炉上バンカーから再生副原料を切り出して転炉内に投入
して吹錬する。At the beginning of blowing in a top/bottom blowing converter, the recycled auxiliary raw material is cut out from the above-furnace bunker in the same manner as normal quicklime addition, and is then put into the converter for blowing.
第３図は溶銑Ｓｉと生石灰原単位を、再生副原料である
取鍋スラグを利用しない場合と取鍋スラグを上・底吹転
炉の吹錬初期に１０ｋｇ’ ／を添加した場合とを比較
して示したものであるが、取鍋スラグを利用することに
よって従来転炉に投入していた生石灰が約６ｋｇ’／を
削減することが出来た。Figure 3 compares the consumption of hot metal Si and quicklime when ladle slag, which is a recycled auxiliary raw material, is not used and when ladle slag is added in an amount of 10 kg'/l at the initial stage of blowing in the top/bottom blowing converter. By using ladle slag, it was possible to reduce the amount of quicklime that was conventionally charged into the converter by approximately 6 kg'/.
第４図は取鍋スラグを利用しない場合と取鍋スラグを１
０ｋｇ”／Ｌ利用した場合のホタル石使用量（ｋｇ ’
／ｌ）を示したものでありホタル石使用量は１１５に
低減できた。Figure 4 shows the case where ladle slag is not used and the case where ladle slag is used.
Amount of fluorite used when using 0kg''/L (kg'
/l), and the amount of fluorite used could be reduced to 115.
表−３は取鍋スラグを、利用しない場合と１０ｋｇ’
／を利用した場合の生石灰使用量、鉄鉱石使用量並びに
製出鋼小止りの状況を示したものであり、生石灰使用量
が削減できるばかりでなく鉄鉱石使用量を増加すること
が出来、製出鋼小止り向上にも有効であることがわかる
。Table 3 shows the case where ladle slag is not used and 10kg'
This figure shows the amount of quicklime used, the amount of iron ore used, and the situation where the production of steel has stalled when using . It can be seen that this method is also effective in improving the small amount of steel tapped.
表−３鉄鉱石、製出鋼小止りの比較（低次＾ｌキルト坤
溶銑率 ＨＲ９５％ 溶銑Ｓｉ＝ ０．１５％溶銑温
度 １３００°Ｃ
（発明の効果）
この発明によれば取鍋内に出鋼した溶鋼に生じる諸問題
、つまり帯同流入した精錬スラグに起因する復りん、脱
酸剤の妻止り低下、そして温度降下などを、有効に回避
することに加え、その結果として生産した取鍋スラグを
、精錬の際の副原料として再生活用して精錬操業の改善
に寄与する、２重の機能を生石灰に負わせることができ
る。Table-3 Comparison of iron ore and steel production small stop (low order ^l quilt molten pig iron ratio HR95% Hot metal Si = 0.15% Hot metal temperature 1300°C (Effect of the invention) According to this invention, in the ladle In addition to effectively avoiding various problems that occur in the tapped molten steel, such as rephosphorization caused by the refining slag that has flowed in with it, a drop in the deoxidizing agent's capacity, and a drop in temperature, the ladle produced as a result Quicklime can have a dual function of contributing to improving smelting operations by recycling slag as an auxiliary raw material during smelting.
第１図は、生石灰の取鍋内添加の効果線図、第２図は、
生石灰付加取鍋スラグの処理フロー図、第３図は、再生
副原料の使用による生石灰原単位の低減効果を示す比較
グラフであり、第４図は、同じくホタル石原単位の低減
効果比較グラフである。
第１図
（ａ）
ｆ ２ ３ ４
生石灰添加量（に＃Ｗ／１）
（ｂ）
全石灰才力Ｕ量（ｔｆｌゲｔ）
第１図
（Ｃ）
全石灰ネカＯ量（メｔプυ
（ｄ）
生石灰罎加量（ＫＷｔ）Figure 1 is the effect diagram of adding quicklime in the ladle, Figure 2 is:
Processing flow diagram for ladle slag with addition of quicklime, Figure 3 is a comparison graph showing the reduction effect of quicklime basic unit by using recycled auxiliary raw materials, and Figure 4 is a comparison graph of the reduction effect of fluorite basic unit. . Figure 1 (a) f 2 3 4 Quicklime addition amount (#W/1) (b) Total lime power U amount (tfl get) Figure 1 (C) Total lime power amount (Metpu υ (d) Quicklime weight (KWt)
Claims (1)
１０ｋｇの生石灰を取鍋内に添加して復りん防止と溶鋼
保熱に供すること、 該取鍋から溶鋼を払い出した後、上記生石 灰を付加した取鍋内スラグを冷却、破砕および磁選処理
して脱りん・脱硫用の副原料に再生し、この再生副原料
を精錬炉に添加して該精錬炉における滓化促進に供する
こと の結合を特徴とする、製鋼プロセスにおけ る生石灰の有効利用法。[Claims] 1. 1 to 1 per ton of molten steel when tapping from the refining furnace to the ladle
Adding 10 kg of quicklime into the ladle to prevent reversion and heat retaining of the molten steel; After discharging the molten steel from the ladle, the slag in the ladle to which the quicklime has been added is cooled, crushed, and magnetically separated. A method for effectively utilizing quicklime in a steelmaking process, which combines the steps of recycling it into an auxiliary raw material for dephosphorization and desulfurization, and adding this recycled auxiliary raw material to a smelting furnace to promote slag formation in the smelting furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60034508A JPS61194107A (en) | 1985-02-25 | 1985-02-25 | Method for effectively utilizing quick lime in steel manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60034508A JPS61194107A (en) | 1985-02-25 | 1985-02-25 | Method for effectively utilizing quick lime in steel manufacturing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61194107A true JPS61194107A (en) | 1986-08-28 |
| JPH0148330B2 JPH0148330B2 (en) | 1989-10-18 |
Family
ID=12416198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60034508A Granted JPS61194107A (en) | 1985-02-25 | 1985-02-25 | Method for effectively utilizing quick lime in steel manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61194107A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264011A (en) * | 1998-03-17 | 1999-09-28 | Kawasaki Steel Corp | Method for effective use of slag |
| JP2002220615A (en) * | 2001-01-30 | 2002-08-09 | Kawasaki Steel Corp | Converter steelmaking method |
| JP2008111181A (en) * | 2006-10-31 | 2008-05-15 | Nippon Steel Corp | Method for smelting aluminum killed steel |
| JP2009249644A (en) * | 2008-04-01 | 2009-10-29 | Kobe Steel Ltd | Method for charging pre-melt slag-formation promotive agent |
| JP2012017504A (en) * | 2010-07-08 | 2012-01-26 | Sumitomo Metal Ind Ltd | Method for suppressing heat dissipation of molten iron |
| JP2013064188A (en) * | 2011-09-20 | 2013-04-11 | Nippon Steel & Sumitomo Metal Corp | Method for recycling steelmaking slag as resource |
| JP2014031563A (en) * | 2012-08-06 | 2014-02-20 | Nippon Steel & Sumitomo Metal | Method for treating a lead-containing ladle slag |
| CN111349746A (en) * | 2018-12-24 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Process for replacing converter lime by using steelmaking tailings |
-
1985
- 1985-02-25 JP JP60034508A patent/JPS61194107A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264011A (en) * | 1998-03-17 | 1999-09-28 | Kawasaki Steel Corp | Method for effective use of slag |
| JP2002220615A (en) * | 2001-01-30 | 2002-08-09 | Kawasaki Steel Corp | Converter steelmaking method |
| JP2008111181A (en) * | 2006-10-31 | 2008-05-15 | Nippon Steel Corp | Method for smelting aluminum killed steel |
| JP2009249644A (en) * | 2008-04-01 | 2009-10-29 | Kobe Steel Ltd | Method for charging pre-melt slag-formation promotive agent |
| JP2012017504A (en) * | 2010-07-08 | 2012-01-26 | Sumitomo Metal Ind Ltd | Method for suppressing heat dissipation of molten iron |
| JP2013064188A (en) * | 2011-09-20 | 2013-04-11 | Nippon Steel & Sumitomo Metal Corp | Method for recycling steelmaking slag as resource |
| JP2014031563A (en) * | 2012-08-06 | 2014-02-20 | Nippon Steel & Sumitomo Metal | Method for treating a lead-containing ladle slag |
| CN111349746A (en) * | 2018-12-24 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Process for replacing converter lime by using steelmaking tailings |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0148330B2 (en) | 1989-10-18 |
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