JPH059603A - Utilizing method for slag in continuous casting and ingot-making - Google Patents
Utilizing method for slag in continuous casting and ingot-makingInfo
- Publication number
- JPH059603A JPH059603A JP3163063A JP16306391A JPH059603A JP H059603 A JPH059603 A JP H059603A JP 3163063 A JP3163063 A JP 3163063A JP 16306391 A JP16306391 A JP 16306391A JP H059603 A JPH059603 A JP H059603A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- ingot
- steel
- continuous casting
- ladle
- 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.)
- Withdrawn
Links
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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、連鋳・造塊スラグの活
用法、詳述すれば、鉄鋼業の製鋼スラグの利材化技術の
一環としての連鋳・造塊スラグの活用法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of utilizing continuous casting / casting slag, more specifically, a method of utilizing continuous casting / casting slag as a part of steelmaking slag utilization technology in the steel industry. .
【０００２】[0002]
【従来の技術】従来、鋳込後のスラグ・地金混合物の処
理は、地金回収のみで分離後のスラグは埋立投棄となり
有効活用されていなかった。2. Description of the Related Art Conventionally, in the treatment of a slag / metal mixture after casting, only the metal collection is carried out, and the slag after separation is discarded as landfill and has not been effectively utilized.
【０００３】しかしながら、今日では環境問題が声高に
議論されるようになり、一方製造コスト引き下げの要求
からこれまでの投棄材であっても有効利用、つまり利材
化を図ることが求められてきている。However, nowadays, environmental problems are being discussed in a loud voice, and on the other hand, there is a demand for effective utilization, that is, utilization of materials, even for discarded materials up to now, due to the demand for reduction in manufacturing cost. There is.
【０００４】従来投棄材として扱われてきた製鋼スラ
グ、例えば転炉スラグ、脱Siスラグ、連続鋳造スラグ、
造塊スラグ、取鍋スラグ、そして脱硫スラグなどについ
ても有効利用を図かるべく種々提案されている。なお、
本明細書ではこのうち連続鋳造スラグ、造塊スラグを
「連鋳・造塊スラグ」と総称する。Steelmaking slag that has been conventionally treated as a dumping material, such as converter slag, de-Si slag, continuous cast slag,
Various proposals have been made for effective use of ingot-making slag, ladle slag, desulfurization slag and the like. In addition,
In this specification, the continuous cast slag and the ingot slag are collectively referred to as “continuous cast / ingot slag”.
【０００５】たとえば、CAMP-ISIJ 、Vol.3 (1990)−12
07には、製鋼スラグをスラグパン台車を使って一箇所に
集め、そこで冷却、分離処理を行い、最終的に鋼分とス
ラグ分とに分離し、前者は適宜製鋼段階に戻され、後者
はスラグカーで集められる方法が開示されているが、こ
の場合にはスラグは結局投棄されるのである。For example, CAMP-ISIJ, Vol.3 (1990) -12
In 07, steelmaking slag is collected in one place using a slag pan cart, cooled and separated there, and finally separated into steel and slag, the former is appropriately returned to the steelmaking stage, and the latter is slag car. However, in this case, the slag is eventually dumped.
【０００６】[0006]
【発明が解決しようとする課題】このように製鋼スラグ
であってもようやくその有効利用が考えられるようにな
ってきたのであるが、それも鋼分だけの分離回収にとど
まっており、ましてそのうちの連鋳・造塊スラグの有効
利用はまったくなされていなかった。Thus, even in the case of steelmaking slag, the effective utilization thereof has finally come to be considered, but it is still limited to the separation and recovery of only the steel component, let alone The effective use of continuous casting and ingot slag was not done at all.
【０００７】かくして、本発明の目的は、製鋼スラグ、
特に連続鋳造スラグおよび造塊スラグについて利材化を
図る方法を提供することである。Thus, an object of the present invention is to produce steelmaking slag,
In particular, it is to provide a method for making continuous cast slag and ingot slag into material.
【０００８】[0008]
【課題を解決するための手段】かかる課題を解決すべ
く、本発明者らは種々検討を重ねたところ、次のような
知見を得た。[Means for Solving the Problems] In order to solve the above problems, the present inventors have made various studies, and have obtained the following findings.
【０００９】製鋼スラグのうちでも連鋳・造塊スラグは
低燐であり (P2O5≦2.0 ％) 、清浄鋼対策、取鍋のスラ
グライン保護、保温の役目を兼ねて取鍋に出鋼中生石灰
を２Kg/T (溶鋼) 以上投入する場合、スラグ中のCaO 含
有量がかなり高い(CaO≧40％) まま回収される。一方、
焼結原料として石灰分を鉄鉱石に配合して焼結用鉱石と
しているが、上記のようにして回収されたスラグを鉄鉱
石に配合して焼結鉱としたところ、石灰石配合の場合と
ほとんど変わらない焼結鉱が得られることを確認して、
本発明に至った。Among steelmaking slags, continuous casting and ingot slag has a low phosphorus content (P 2 O 5 ≦ 2.0%), and is used in ladle for clean steel measures, ladle slag line protection and heat retention. When more than 2 kg / T (molten steel) is added to the lime in the steel, the CaO content in the slag is recovered at a considerably high level (CaO ≧ 40%). on the other hand,
Although lime is mixed with iron ore as a sintering raw material to make an ore for sintering, when the slag recovered as described above is mixed with iron ore to make a sintered ore, it is almost the same as in the case of limestone compounding. After confirming that the same sintered ore can be obtained,
The present invention has been completed.
【００１０】ここに、本発明は、転炉出鋼中取鍋中に生
石灰を２Kg/T (溶鋼) 以上投入すること、連鋳・インゴ
ット鋳込後に取鍋中に残留するスラグおよび地金を鋼滓
鍋またはスラグパンに受けること、スラグおよび地金の
比重分離を行い、地金は鉄源として製鋼原料に、スラグ
は焼結鉱配合用にそれぞれ回収すること、および回収さ
れたスラグを鉄鉱石に配合して焼結用鉱石とすることを
特徴とする連鋳・造塊スラグの活用法である。According to the present invention, at least 2 kg / T (molten steel) of quick lime is put into a ladle during tapping of a converter, and slag and metal that remain in the ladle after continuous casting and ingot casting are removed. It is received in a steel slag pan or slag pan, the specific gravity of slag and metal is separated, the metal is recovered as a steel source for steelmaking, and the slag is recovered for sinter compounding, and the recovered slag is iron ore. It is a method of utilizing continuously cast and agglomerated slag, which is characterized in that it is mixed with and used as sintering ore.
【００１１】本発明の好適態様によれば、前記比重分離
に代えてあるいはそれに加えて磁選を行うようにしても
よい。According to a preferred aspect of the present invention, magnetic separation may be performed instead of or in addition to the specific gravity separation.
【００１２】[0012]
【作用】添付図面は、本発明にかかるスラグの回収・活
用法の工程図である。The attached drawings are process diagrams of the method of collecting and utilizing slag according to the present invention.
【００１３】(1) 転炉出鋼に際しては、取鍋中に生石灰
２K/T 以上投入する。これは清浄鋼対策、取鍋スラグラ
イン保護、保温の役目を兼ねるものであるが、本発明に
あっては回収するスラグ中のCaO 量を確保するためとい
うことができる。(1) At the time of tapping the converter, at least 2 K / T of quick lime is put in the ladle. This serves as a measure for clean steel, protection of the ladle slag line, and heat retention, but in the present invention it can be said to secure the amount of CaO in the slag to be recovered.
【００１４】したがって、本発明によれば、出鋼中取鍋
に生石灰を２K/T 以上投入することによって、CaO 添加
が行われ、連鋳・造塊スラグ成分としては、CaO ≧40％
となる。Therefore, according to the present invention, CaO is added by adding quick lime at a rate of 2 K / T or more to the tapping medium ladle, and CaO ≥40% as a continuous casting / casting slag component.
Becomes
【００１５】所望により、一層の低燐化をはかるため、
スラグ−カット(Voest式等) を併用してもよい。これに
より、スラグ中の(P)の鍋中流入の抑制が図られ、(P
2O5)≦２％に制限することができる。If desired, in order to further reduce phosphorus,
Slag-cut (Voest type etc.) may be used together. As a result, the inflow of (P) into the pan in the slag is suppressed, and (P)
It can be limited to 2 O 5 ) ≦ 2%.
【００１６】(2) 取鍋への出鋼後は、これも必要に応じ
て炉外精錬、例えば真空脱ガス処理を行ってもよい。(2) After tapping the ladle, it may be subjected to outside furnace refining, for example, vacuum degassing treatment, if necessary.
【００１７】(3) 取鍋からは溶鋼を連続鋳造するか、あ
るいはインゴット鋳込みを行う。これは慣用法で行えば
よく、特に制限はない。鋳込後取鍋内に残留するスラグ
・地金を鋼滓鍋もしくはスラグパンに受ける。(3) Molten steel is continuously cast from the ladle or ingot cast. This may be done by a conventional method, and there is no particular limitation. After casting, the steel slag pan or slag pan receives the slag and metal remaining in the ladle.
【００１８】(4) このようにして鋼滓鍋もしくはスラグ
パンに受けたスラグ・地金は、次いで、必要により適宜
粒度にまで粉砕してから比重分離 (必要に応じ磁選) を
行う。比重分離と磁選とは何れか一方あるいは両方を行
ってもよい。磁選を併用し、グラファイト分を除去する
のが好ましい。(4) The slag / metal ingot thus received in the steel slag pan or slag pan is then crushed to an appropriate particle size, if necessary, and then subjected to specific gravity separation (magnetic separation if necessary). Either or both of the specific gravity separation and the magnetic separation may be performed. It is preferable to remove the graphite component by using magnetic separation together.
【００１９】(5) このとき分離・回収された地金は鉄源
として転炉などの適宜製鋼段階で使用される。または連
鋳・造塊スラグは焼結鉱配合用として回収され、焼結工
場に送られ、鉄鉱石に配合されて焼結鉱として再利用さ
れる。(5) The metal separated and recovered at this time is used as an iron source in a suitable steelmaking stage such as a converter. Alternatively, the continuous cast and ingot slag is collected for sinter ore compounding, sent to a sinter plant, compounded with iron ore and reused as sinter ore.
【００２０】本発明にしたがって焼結鉱配合用に供する
連鋳・造塊スラグは低(P2O5)、高(CaO) のCaO −Al2O3
−SiO2系スラグであり、ハンドリングコストを考慮して
もスラグ再利用が経済的である。The continuous cast and ingot slag used for sinter compound according to the present invention has low (P 2 O 5 ) and high (CaO) CaO-Al 2 O 3
It is a -SiO 2 system slag, slag re-use even in consideration of handling cost is economical.
【００２１】このように、本発明によれば、従来は投棄
していた連鋳・造塊スラグを焼結鉱の原料として有効活
用する方法が確立されることになり、(1) 安価な焼結原
料の確保、そして(2) 産業廃棄物の利材化促進という実
用上の大きな利益が得られる。As described above, according to the present invention, a method for effectively utilizing continuously cast and ingot-cast slag, which has been conventionally discarded, as a raw material for sinter ore is established. (1) Inexpensive firing Great practical gains can be obtained by securing binding materials and (2) promoting the industrialization of industrial waste.
【００２２】また、最近の投棄場所枯渇化が見られる状
況からは、本発明は環境保護の面からもその意義は大き
い。Further, in view of the recent depletion of dumping sites, the present invention is of great significance in terms of environmental protection.
【００２３】次に、実施例によって本発明をさらに具体
的に説明する。Next, the present invention will be described more specifically by way of examples.
【００２４】[0024]
【実施例１】本例では、薄板用低炭材を転炉吹錬してか
ら[(終点 [C]＝0.05％、[P] ＝0.015 ％) 、図１の工程
図にしたがって取鍋中に生石灰を２K/T 投入して出鋼
後、RH精錬して連続鋳造した。連続鋳造完了後に取鍋か
ら取り出したスラグ・地金から比重分離法で分離したス
ラグの組成は、表１に示す通りであった。この回収スラ
グ10K/T(CaO ＝41％、P2O5＝1.5％) を焼結用原料とし
て焼結工場に送って、鉄鉱石に４％配合し、焼結特性を
見たところ、特に問題はなかった。[Embodiment 1] In this embodiment, a low carbon material for thin plates is blown in a converter and then [(end point [C] = 0.05%, [P] = 0.015%), and then ladle is placed according to the process chart of FIG. 2K / T of quick lime was put into the steel and the steel was tapped, then RH refined and continuously cast. The composition of the slag separated from the slag / metal taken out of the ladle after the continuous casting by the specific gravity separation method is as shown in Table 1. This recovered slag 10K / T (CaO = 41%, P 2 O 5 = 1.5%) was sent to a sintering plant as a raw material for sintering and mixed with iron ore at 4% to see the sintering characteristics. There was no problem.
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【実施例２】厚板用低炭、低燐鋼を転炉吹練し( 終点
[C] ＝0.04％、[P] ＝0.008 ％) 、図１の工程図にした
がって取鍋中に生石灰を５K/T 投入し、Voest 式スラグ
−カットで鍋中へのスラグ流入を抑制して出鋼後、RH精
錬して連続鋳造した。実施例１と同様にして鋳込後に分
離回収したスラグの組成は表２に示す通りであった。こ
の回収スラグ12K/T (CaO＝55％、P2O5＝0.7 ％) を焼結
用原料として焼結工場に送って、鉄鉱石に３％配合し、
焼結特性を見たところ、特に問題はなかった。Example 2 Low carbon and low phosphorus steel for thick plates was blown into a converter (end point
[C] = 0.04%, [P] = 0.008%), 5K / T of quicklime was added to the ladle according to the process diagram in Fig. 1, and the Voest slag-cut was used to suppress the inflow of slag into the pot. After tapping, RH refining and continuous casting were performed. The composition of the slag separated and recovered after casting in the same manner as in Example 1 is as shown in Table 2. This recovered slag 12K / T (CaO = 55%, P 2 O 5 = 0.7%) was sent to a sintering plant as a raw material for sintering and mixed with iron ore at 3%,
Looking at the sintering characteristics, there were no particular problems.
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【発明の効果】本発明は、その構成は極く簡便ながら、
産業廃棄物の利材化による実用上の利益は次のように著
しい。The present invention has a very simple constitution,
The practical benefits of using industrial waste as materials are remarkable as follows.
【００２９】(1) 省資源
使用済みの連鋳・造塊スラグに含まれる約1/2 の生石灰
が回収・再利用されるためそれだけ節減が図られる。(1) About 1/2 of the quicklime contained in the continuously cast and ingot slag that has been used to save resources is recovered and reused, which leads to a corresponding saving.
【００３０】(2) 埋立投棄地造成等不要
地金と「連鋳・造塊スラグ」とに分離し、スラグを有効
活用した経済的かつ地球環境面からも望ましい発明であ
る。(2) It is a desirable invention from the viewpoint of economical and global environment in which unnecessary slag is effectively utilized by separating it into unnecessary metal such as landfill dump land formation and "continuous casting / ingot slag".
【図１】本発明の方法の工程図である。FIG. 1 is a process drawing of the method of the present invention.
Claims (2)
鋼) 以上投入すること、連鋳・インゴット鋳込後に取鍋
中に残留するスラグおよび地金を鋼滓鍋またはスラグパ
ンに受けること、スラグおよび地金の比重分離を行い、
地金は鉄源として製鋼原料に、スラグは焼結鉱配合用に
それぞれ回収すること、および回収されたスラグを鉄鉱
石に配合して焼結用鉱石とすることを特徴とする連鋳・
造塊スラグの活用法。1. A quick lime of 2 Kg / T (molten steel) or more is charged into a ladle in the converter tapping steel, and slag and metal remaining in the ladle after continuous casting / ingot casting are cast into a steel slag pan or slag pan. The specific gravity of slag and metal,
Continuous casting characterized by recovering ingots as steel sources for steelmaking raw materials, slag for sinter compounding, and mixing the recovered slag with iron ore as sintering ores.
Utilization of ingot slag.
えて磁選を行う請求項１記載の方法。2. The method according to claim 1, wherein magnetic separation is performed instead of or in addition to the specific gravity separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3163063A JPH059603A (en) | 1991-07-03 | 1991-07-03 | Utilizing method for slag in continuous casting and ingot-making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3163063A JPH059603A (en) | 1991-07-03 | 1991-07-03 | Utilizing method for slag in continuous casting and ingot-making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH059603A true JPH059603A (en) | 1993-01-19 |
Family
ID=15766479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3163063A Withdrawn JPH059603A (en) | 1991-07-03 | 1991-07-03 | Utilizing method for slag in continuous casting and ingot-making |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH059603A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100584764B1 (en) * | 2001-12-27 | 2006-05-30 | 주식회사 포스코 | A Method of Separating the By-Products from Continueous Casting Process |
| WO2010110209A1 (en) | 2009-03-24 | 2010-09-30 | 日本製紙株式会社 | Heat-sensitive recording material |
-
1991
- 1991-07-03 JP JP3163063A patent/JPH059603A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100584764B1 (en) * | 2001-12-27 | 2006-05-30 | 주식회사 포스코 | A Method of Separating the By-Products from Continueous Casting Process |
| WO2010110209A1 (en) | 2009-03-24 | 2010-09-30 | 日本製紙株式会社 | Heat-sensitive recording material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109022644B (en) | Method for recovering slag desulfurization and dephosphorization in cooperation with ferrite in full-three-removal process | |
| JP2012007189A (en) | Method for recovering iron and phosphorus from steelmaking slag, blast furnace slag fine powder or blast furnace slag cement, and phosphate resource raw material | |
| RO131333A2 (en) | Fluxing agent, process for preparing the same, agglomeration mixture and use of slag from secondary metallurgy | |
| JP5531536B2 (en) | Method for recovering iron and phosphorus from steelmaking slag | |
| JPH06145836A (en) | Production of alloy utilizing aluminum slag | |
| JP2003073726A (en) | METHOD FOR MANUFACTURING LOW Ti STEEL | |
| JP2001192741A (en) | Method for utilizing steel making slag | |
| JP5017846B2 (en) | Reuse of chromium-containing steel refining slag | |
| JP5720497B2 (en) | Method for recovering iron and phosphorus from steelmaking slag | |
| JP2002053351A (en) | Pollution-free stainless steel slag and method for manufacturing the same | |
| CN109897934B (en) | Method for improving efficient phosphorus enrichment effect in phosphorus-containing steel slag | |
| JP4932309B2 (en) | Chromium recovery method from chromium-containing slag | |
| JP5341849B2 (en) | Manufacturing method of recycled slag | |
| JPH059603A (en) | Utilizing method for slag in continuous casting and ingot-making | |
| CN115710634A (en) | Method for treating sintering dust removal ash and waste coating of continuous casting tundish | |
| JP3675302B2 (en) | Detoxification method for stainless steel slag | |
| Zhang et al. | A new method of red mud recycling in the process of hot metal pretreatment | |
| JPH11264011A (en) | Method for effective use of slag | |
| Dilip et al. | Modification of microstructure of LD slag for recovery of hybrid flux material | |
| JP4421313B2 (en) | Manufacturing method of molten steel | |
| JP6028820B2 (en) | Recycling method of dust generated in RH vacuum degassing equipment | |
| JP4254412B2 (en) | Hot metal desulfurization method | |
| CN116871306A (en) | Steelmaking metal solid waste treatment method | |
| JP6435026B2 (en) | Reducing agent reduction method during refining of stainless steel | |
| JP2000256720A (en) | Method for refining molten iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981008 |