JPS5919897B2 - Method for reforming converter slag - Google Patents
Method for reforming converter slagInfo
- Publication number
- JPS5919897B2 JPS5919897B2 JP4077779A JP4077779A JPS5919897B2 JP S5919897 B2 JPS5919897 B2 JP S5919897B2 JP 4077779 A JP4077779 A JP 4077779A JP 4077779 A JP4077779 A JP 4077779A JP S5919897 B2 JPS5919897 B2 JP S5919897B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- converter
- reforming
- free
- converter slag
- 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
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
- C21C5/36—Processes yielding slags of special composition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture Of Iron (AREA)
- Furnace Details (AREA)
Description
【発明の詳細な説明】
本発明は転炉スラグの改質方法に係り、特にほうろう処
理後の廃棄スリップによる転炉スラグの崩壊性消滅の改
質方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for reforming converter slag, and more particularly to a method for reforming converter slag to eliminate its collapsibility due to waste slip after enameling.
最近製鉄工場で発生するスラグの再利用が大きくクロー
ズアップされ、転炉スラグも高炉への利用、もしくは焼
結鉱の副原料として使用されるに至っている。Recently, the reuse of slag generated in steel factories has received a lot of attention, and converter slag has come to be used in blast furnaces or as an auxiliary raw material for sintered ore.
しかし、高炉への再利用は成分やその他の制約から全量
を吸収するに至らず、焼結鉱副原料として再利用する場
合には、該スラグを５〜１０ｍ７ｒｔ以下に粉砕しなけ
ればならないが、転炉スラグは硬くて粉砕性が良好では
ない。However, due to composition and other constraints, reusing the slag in a blast furnace cannot absorb the entire amount, and when reusing it as an auxiliary raw material for sinter, the slag must be pulverized to 5 to 10 m7rt or less. Converter slag is hard and does not have good crushability.
また、鉄道用道床材、路盤材、セメント用原料としても
利用可能であるが、この場合には転炉スラグ中に存在す
る遊離ＣａＯｌＭｇＯのために水中や空気中で崩壊する
性質があるために、かかる遊離ＣａＯｌＭｇＯを除去す
る改質を行わなければならない。It can also be used as a raw material for railroad bed materials, roadbed materials, and cement, but in this case, it has a tendency to disintegrate in water or air due to the free CaOlMgO present in converter slag. Modification must be performed to remove such free CaOlMgO.
かかる転炉スラグ改質の従来法としては転炉の出鋼後、
スラグをスラグ鍋に受け、この溶融スラグ（以下溶滓と
称する）に酸素ガスを吹込んで昇温させることによって
遊離ＣａＯｌＭｇＯを除去する方法が採られている。The conventional method for converter slag reforming is that after tapping the converter,
A method is adopted in which free CaOlMgO is removed by receiving slag in a slag pot and blowing oxygen gas into the molten slag (hereinafter referred to as slag) to raise the temperature.
しかし、この方法は、スラグ温度や流動性などの影響に
よって常に安定して遊離Ｃａｂ、ＭｇＯを除去するこ六
が困難であるという欠点がある。However, this method has the disadvantage that it is difficult to always and stably remove free Cab and MgO due to the influence of slag temperature, fluidity, etc.
本発明の目的は、転炉スラグの改質方法における上記従
来法の欠点を解消して、常に安定して遊離Ｃａｂ、Ｍｇ
Ｏを除去することができる効果的な方法を提供するにあ
る。The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional method in the converter slag reforming method, and to constantly and stably release free Cab and Mg.
The object of the present invention is to provide an effective method capable of removing O.
本発明の要旨とするところは次のとおりである。The gist of the present invention is as follows.
すなわち、転炉にて生成したスラグ中の遊離ＣａＯ１Ｍ
ｇＱを除去する転炉スラグの改質方法において、前記転
炉よりの溶滓をスラグ鍋に受ける工程と、前記溶滓中の
酸素ガスを吹込み昇温させる工程と、前記昇温した溶滓
中にほうろう工場にて発生する廃棄スリップを添加する
工程と、を有して成ることを特徴とする転炉スラグの改
質方法、である。That is, free CaO1M in the slag produced in the converter
A converter slag reforming method for removing gQ includes a step of receiving slag from the converter into a slag pot, a step of blowing oxygen gas into the slag to raise its temperature, and a step of raising the temperature of the slag with the heated slag. A method for reforming converter slag, comprising the step of adding waste slip generated in an enamel factory into the converter slag.
本発明者らは転炉スラグの改質研究に当り、該スラグ中
に存在する遊離Ｃａｂ、ＭｇＯは強い塩基性酸化物であ
ることに着目し、これと反応し易い酸性酸化物を添加す
ることにより遊離ＣａＯｌＭｇＯを除去し得るものとし
て、その恰好な酸性酸化物としてほうろう工場より産業
廃棄物として発生するフリット残渣のスリップを利用す
ることによってきわめて安価に、しかも容易に改質の目
的を達成することができた。The present inventors conducted research on reforming converter slag, and focused on the fact that free Cab and MgO present in the slag are strong basic oxides, and added acidic oxides that easily react with them. To achieve the purpose of reforming very cheaply and easily by using slip of frit residue generated as industrial waste from an enamel factory as a suitable acidic oxide for removing free CaOlMgO. was completed.
本発明の詳細は次のとおりである。The details of the invention are as follows.
先づ、転炉の出鋼完了後、その溶滓をスラグ鍋に受ける
。First, after tapping the steel from the converter, the slag is received in a slag ladle.
その後消耗型のランスを使用し、酸素ガスを溶滓中に吹
込みスラグ温度を上昇させる。Then, using a consumable lance, oxygen gas is blown into the slag to raise the slag temperature.
スラグ温度上昇後スリップを添加するとスラグの流動性
が良くなっている上に低融点のスリップの添加によって
容易に遊離Ｃａｂ、ＭｇＯと反応して複合酸化物を生成
し遊離ＣａＯｌＭｇＯを除去することができる。Adding slip after the slag temperature rises improves the fluidity of the slag, and addition of slip with a low melting point can easily react with free Cab and MgO to generate composite oxides and remove free CaOlMgO. .
はうろう工場で発生する廃棄スリップの組成は通常５ｉ
Ｏ２５０係、Ｂ２０３１５〜２０係、その他Ｔ ｉ０２
等の酸性酸化物が合計で７０係以上あり、スリップ処理
を行った後の溶滓温度は１６００°Ｃ以上の高温となり
、その侭保持すれは比重差によって上部がＰ２Ｏ５の高
い層、下部はＰ２Ｏ５の低い層に分離し、Ｐ２Ｏ５の分
離方法としても適用可能である。The composition of waste slips generated in crawling factories is usually 5i.
O250 section, B20315-20 section, other T i02
There are a total of more than 70 modulus of acidic oxides such as, etc., and the temperature of the slag after slip treatment is as high as 1600°C or more.Due to the difference in specific gravity, the upper layer is a high P2O5 layer and the lower layer is a P2O5 layer. It can also be applied as a method for separating P2O5.
かくして得た改質スラグをのろ畑に流滓冷却すると、破
砕性の良好な遊離Ｃａｂ、ＭｇＯのほとんど存在しない
スラグとなり、いずれの用途にも有効に利用可能である
。When the thus obtained modified slag is cooled by trickling in a slow field, it becomes a slag with good friability and almost no free Cab and MgO, which can be effectively used for any purpose.
実施例
低炭素リムド鋼製造時の転炉スラグを従来どおりなんら
の処理を施さずのる畑に流滓した場合と、本発明法によ
って改質処理したものとの比較試験を実施し、スラグ中
に含まれる遊離ＣａＯを比較した。Example A comparative test was conducted between converter slag from the production of low-carbon rimmed steel, which was poured into a field without any treatment as before, and that which was modified by the method of the present invention. The free CaO contained in
この試験における本発明法の実施に使用したほうろう工
場の廃棄スリップの組成ならびに軟化点、融点は第１表
のとおりである。The composition, softening point, and melting point of the waste slip from the enamel factory used to carry out the method of the present invention in this test are shown in Table 1.
従来法および本発明法による比較試験結果は第２表に示
すとおりである。The comparative test results using the conventional method and the method of the present invention are shown in Table 2.
スリップの添加量は転炉スラグ中に最初に存在する遊離
Ｃａｂ、ＭｇＯ量によって決定するが、通常未改質の転
炉スラグ中の遊離ＣａＯは約５係であるので、これとほ
ぼ等量のスリップを添加すれはよいが、酸素ガスを吹込
むことによって遊離ＣａＯの一部がスラグ化するので等
量よりも少くてもよい。The amount of slip added is determined by the amount of free Cab and MgO initially present in the converter slag, but since the amount of free CaO in unreformed converter slag is about 5%, approximately the same amount is added. It is possible to add slip, but since some of the free CaO becomes slag by blowing in oxygen gas, it may be added in less than an equal amount.
本発明者らの実験によると第２表に示す如くスラグを当
り５０〜１００ｋｇが最も効果的であることが判明した
。According to the experiments conducted by the present inventors, as shown in Table 2, it was found that 50 to 100 kg of slag is most effective.
この比較試験結果によると、本発明法による改質スラグ
中の遊離ＣａＯは従来法によるなんら処理しないスラグ
の遊離ＣａＯに比し、その１／１゜以下に
低減し、０．２〜０．３係となり、いずれの用途に対し
ても問題はない。According to the results of this comparative test, the free CaO in the modified slag by the method of the present invention is reduced to 1/1 degree or less compared to the free CaO in the slag without any treatment by the conventional method, and is 0.2 to 0.3 There are no problems with either application.
また改質した未滓化の遊離ＣａＯのほとんど存在しない
転炉スラグの粉化率は、従来の未改質スラグに比し１／
１ｏ以下に低減し、更に水浸による膨張の経時変化を調
査した処、なんらの変化もなくほぼ一定値にて推移する
ことが判明したことから、路盤材、道床材としても有効
に利用できることが明らかとなった。In addition, the pulverization rate of modified converter slag, which contains almost no free CaO, is 1/1 that of conventional unmodified slag.
After reducing the temperature to 1o or less, we further investigated the change in expansion due to water immersion over time and found that it remained at a nearly constant value without any change, indicating that it can be effectively used as roadbed material and road bed material. It became clear.
本発明による転炉スラグの改質方法によって次の如き効
果を収めることができた。The method for reforming converter slag according to the present invention has achieved the following effects.
（イ）転炉スラグ中の遊離Ｃａｂ、ＭｇＯを安定な複合
酸化物に滓化することができ、崩壊性の消滅と粉砕性の
改善により高炉、焼結炉等の配合原料には勿論、その他
の鉄道用道床材、路盤材、セメント用原料等いずれの用
途にも有効利用できるようになった。(b) Free Cab and MgO in converter slag can be turned into stable composite oxide slag, which eliminates collapsibility and improves crushability, so it can be used as a blended raw material for blast furnaces, sintering furnaces, etc. Now it can be effectively used for various purposes such as railway bed material, roadbed material, and raw material for cement.
（ロ）改質添加材として従京産業廃棄物としてその処理
に窮していたほうろう工場より発生する廃棄スリップを
利用する一方、転炉スラグの改質材としては最大の効果
を挙げ得るので一石二鳥の効果がある。(b) As a reforming additive, waste slip generated from the enamel factory, which had difficulty in disposing of it as industrial waste in Tokyo, is used, while it can be most effective as a reforming material for converter slag, killing two birds with one stone. There is an effect.
（ハ）製鉄所内のみならず、その他の用途にて販路を拡
大できるので資源の有効利用の効果を著増できる。(c) Sales channels can be expanded not only within the steelworks but also for other uses, so the effect of effective use of resources can be significantly increased.
Claims (1)
除去する転炉スラグの改質方法において、前記転炉より
゛の溶滓をスラグ鍋に受ける工程と、前記溶滓中に酸素
ガスを吹込み昇温させる工程と、前記昇温した溶滓中に
ほうろう工場にて発生する廃棄スリップを添加する工程
と、を有して成ることを特徴とする転炉スラグの改質方
法。1. A converter slag reforming method for removing free CaOlMgO in slag generated in a converter, including the steps of receiving slag from the converter into a slag pot, and blowing oxygen gas into the slag. A method for reforming converter slag, comprising the steps of raising the temperature, and adding waste slip generated in an enamel factory to the heated slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4077779A JPS5919897B2 (en) | 1979-04-03 | 1979-04-03 | Method for reforming converter slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4077779A JPS5919897B2 (en) | 1979-04-03 | 1979-04-03 | Method for reforming converter slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55134116A JPS55134116A (en) | 1980-10-18 |
| JPS5919897B2 true JPS5919897B2 (en) | 1984-05-09 |
Family
ID=12590050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4077779A Expired JPS5919897B2 (en) | 1979-04-03 | 1979-04-03 | Method for reforming converter slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919897B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61203993U (en) * | 1985-06-10 | 1986-12-22 | ||
| JPH017839Y2 (en) * | 1983-05-16 | 1989-03-01 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6379743A (en) * | 1986-09-24 | 1988-04-09 | 日本化学工業株式会社 | Dustproofing agent for steel slag, manufacture and treatment of steel slag therewith |
| TWI561496B (en) * | 2012-04-05 | 2016-12-11 | China Steel Corp | Far-infrared emitting material and method of making the same |
| JP6413958B2 (en) * | 2015-07-07 | 2018-10-31 | Ｊｆｅスチール株式会社 | Method for reforming steelmaking slag |
| CN111910029A (en) * | 2020-07-09 | 2020-11-10 | 钢研晟华科技股份有限公司 | Device and method for cooperative quenching and tempering of steel slag and laterite-nickel ore |
-
1979
- 1979-04-03 JP JP4077779A patent/JPS5919897B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH017839Y2 (en) * | 1983-05-16 | 1989-03-01 | ||
| JPS61203993U (en) * | 1985-06-10 | 1986-12-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55134116A (en) | 1980-10-18 |
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