JPH08259282A - Stabilization treatment of steel making slag - Google Patents
Stabilization treatment of steel making slagInfo
- Publication number
- JPH08259282A JPH08259282A JP6022695A JP6022695A JPH08259282A JP H08259282 A JPH08259282 A JP H08259282A JP 6022695 A JP6022695 A JP 6022695A JP 6022695 A JP6022695 A JP 6022695A JP H08259282 A JPH08259282 A JP H08259282A
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- Prior art keywords
- slag
- steam
- atmosphere
- water
- aging
- 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.)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、製鋼スラグの安定化処
理方法に関し、路盤材等に使用される製鋼スラグの膨張
性を安定化し、かつその後に製鋼スラグからＣａ及びＭ
ｇが溶出するのを防止する技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stabilizing a steelmaking slag, which stabilizes the expansivity of the steelmaking slag used for a roadbed material, etc.
The present invention relates to a technique for preventing g from being eluted.
【０００２】[0002]
【従来の技術】転炉スラグ等の製鋼スラグは遊離Ｃａ
Ｏ、遊離ＭｇＯを多く含むため、水と接触して水和反応
が生じ、それぞれＣａ（ＯＨ）2 、Ｍｇ（ＯＨ）2 とな
る。このとき体積は約２倍になり膨張する。したがっ
て、遊離ＣａＯ、遊離ＭｇＯを多く含むスラグを路盤材
等に使用した場合、水と接触することによる膨張のた
め、スラグが徐々に崩壊、粉化し、この結果、路盤に凹
凸を生じて、車両の走行に支障を生じることになる。2. Description of the Related Art Steelmaking slag such as converter slag is free of Ca.
Since it contains a large amount of O and free MgO, it is brought into contact with water to cause a hydration reaction and become Ca (OH) 2 and Mg (OH) 2 , respectively. At this time, the volume doubles and expands. Therefore, when a slag containing a large amount of free CaO and free MgO is used as a roadbed material or the like, the slag gradually disintegrates and powders due to expansion caused by contact with water, and as a result, unevenness is generated on the roadbed, resulting in a vehicle. This will hinder driving.
【０００３】このような製鋼スラグの異常膨張の原因と
なる遊離ＣａＯ、遊離ＭｇＯを減少させ、その膨張性を
安定化するための方法として、次のような方法が知られ
ている。 （１）水蒸気エージング処理方法 この処理は「住友金属」ｖｏｌ．４５，Ｎｏ．４（１９
９３）ｐ３２や特開昭６１−１０１４４１号公報に開示
されているように、徐冷した製鋼スラグを道路用鉄鋼ス
ラグの粒度規格に粗砕し、粒度調整した後、山積みし、
大気圧下で水蒸気により水和反応を行わせることによ
り、膨張性を安定化する水蒸気エージング処理方法であ
る。 （２）高温での炭酸化処理方法 この処理は、特開昭５２−１２９６７２号公報に開示さ
れているように、溶滓を粒滴化し、凝固させた後、８０
０〜３００℃の温度領域をＣＯ2 雰囲気下に保持し、遊
離ＣａＯをＣａＣＯ3 に炭酸化させることにより、膨張
性を安定化させる炭酸化処理方法である。The following method is known as a method for stabilizing free expansivity by reducing free CaO and free MgO which cause such abnormal expansion of steelmaking slag. (1) Steam aging treatment method This treatment is performed by "Sumitomo Metals" vol. 45, No. 4 (19
93) As disclosed in p32 and Japanese Patent Application Laid-Open No. 61-101441, slowly cooled steelmaking slag is roughly crushed to a particle size specification of steel slag for road, adjusted in particle size, and then piled up,
This is a steam aging treatment method that stabilizes the expansivity by performing a hydration reaction with steam under atmospheric pressure. (2) Method of carbonation treatment at high temperature This treatment is carried out as described in JP-A-52-129672, after the molten slag is granulated and solidified,
This is a carbonation treatment method in which the temperature range of 0 to 300 ° C. is maintained in a CO 2 atmosphere and free CaO is carbonized into CaCO 3 to stabilize the expansivity.
【０００４】[0004]
【発明が解決しようとする課題】水蒸気エージング処理
により膨張性を安定化したスラグは、下記（１）式に示
すように、生成したＣａ（ＯＨ）2 が徐々に雨水等の水
に溶解して、ＯＨ- イオンを生じるため、スラグと接触
した雨水等の水がＯＨ- イオンにより約ｐＨ１０以上の
アルカリ性になる問題がある。高ｐＨの水が地下水に混
入すると井戸水等の水質に影響を及ぼすことが懸念され
る。The slag whose expansivity is stabilized by steam aging treatment has the Ca (OH) 2 generated gradually dissolved in water such as rainwater as shown in the following formula (1). , OH − ions are generated, so that there is a problem that water such as rainwater that comes into contact with the slag becomes alkaline at about pH 10 or more due to OH − ions. When high-pH water is mixed with groundwater, it is feared that the quality of well water will be affected.
【０００５】 Ｃａ（ＯＨ）2 →Ｃａ＋２ＯＨ- …（１） 一方、粒滴化後高温で炭酸化処理して得られるスラグ
は、例えば粒径が０．１〜１０．３ｍｍであり、路盤材
として必要な粒径４０ｍｍ以下のスラグが得られない。
また、製鋼スラグ中の遊離ＣａＯ、遊離ＭｇＯは、スラ
グの塊の表面だけでなく塊の内部にも取り囲まれてお
り、その存在状態は様々である。したがって、たとえ粒
径４０ｍｍのスラグが得られたとしても、粒子内部の遊
離ＣａＯ、遊離ＭｇＯまで炭酸化するには極めて長時間
を要し、かつ高温雰囲気下にする必要があるためコスト
的に問題がある。Ca (OH) 2 → Ca + 2OH − (1) On the other hand, the slag obtained by carbonization at a high temperature after granulation has a particle size of 0.1 to 10.3 mm and is used as a roadbed material. Slag with a required particle size of 40 mm or less cannot be obtained.
Further, free CaO and free MgO in the steelmaking slag are surrounded not only on the surface of the slag mass but also inside the mass, and the existence state thereof is various. Therefore, even if a slag having a particle diameter of 40 mm is obtained, it takes a very long time to carbonate free CaO and free MgO inside the particle, and it is necessary to place it in a high temperature atmosphere, which is a cost problem. There is.
【０００６】本発明は、上記事情に鑑み、路盤材の粒度
に適したスラグの膨張性を安定化し、かつ雨水等の接触
によるアルカリ水の発生を防止する処理方法を提供する
ことを目的とする。In view of the above circumstances, it is an object of the present invention to provide a treatment method that stabilizes the expansivity of slag suitable for the particle size of roadbed material and prevents the generation of alkaline water due to contact with rainwater or the like. .
【０００７】[0007]
【課題を解決するための手段】本発明は、上記の問題点
を解決する手段として、製鋼スラグを大気圧下におい
て、水蒸気雰囲気下でエージング処理して膨張性を安定
化した後、水蒸気とＣＯ 2 ガスの混合雰囲気下で１時間
以上保持することを特徴とする。ここで対象となる製鋼
スラグには、溶銑予備処理工程で生じる溶銑予備処理ス
ラグ、転炉精錬で生じる転炉スラグだけでなく、取鍋ス
ラグ、連鋳造塊スラグ、電炉スラグまで含まれる。The present invention has the above-mentioned problems.
As a means to solve the problem, the steelmaking slag is placed under atmospheric pressure.
Stable swelling by aging treatment in steam atmosphere
After conversion, steam and CO 2 1 hour under mixed gas atmosphere
The above feature is retained. Steelmaking covered here
The slag contains hot metal pretreatment slag produced in the hot metal pretreatment process.
Lag, not only converter slag generated by converter smelting, but also ladle slag
Includes lag, continuous cast slag, and electric furnace slag.
【０００８】[0008]
【作用】本発明は上記問題点を解決するために種々の実
験、検討をした結果、水蒸気エージングによりスラグの
膨張性を安定化した後、水蒸気とＣＯ2 ガスの混合雰囲
気中で、水蒸気エージングにより生成したＣａ（ＯＨ）
2 及びＭｇ（ＯＨ）2 をそれぞれ下記（２）式、（３）
式のようにＣａＣＯ2 、ＭｇＣＯ3 として炭酸化するこ
とにより、雨水等の接触によるアルカリ水の発生を防止
できることを見出し、本発明を完成するに至った。As a result of various experiments and studies to solve the above problems, the present invention stabilizes the expansivity of the slag by steam aging, and then performs steam aging in a mixed atmosphere of steam and CO 2 gas. Generated Ca (OH)
2 and Mg (OH) 2 are respectively represented by the following formula (2) and (3)
The inventors have found that carbonation of CaCO 2 and MgCO 3 as in the formula can prevent the generation of alkaline water due to contact with rainwater, and have completed the present invention.
【０００９】 Ｃａ（ＯＨ）2 ＋ＣＯ2 → ＣａＣＯ3 ＋Ｈ2 Ｏ …（１） Ｍｇ（ＯＨ）2 ＋ＣＯ2 → ＭｇＣＯ3 ＋Ｈ2 Ｏ …（２） 本発明の製鋼スラグの安定化処理方法では、製鋼スラグ
の膨張性を水蒸気エージングにより安定化した後、水蒸
気とＣＯ2 ガスの混合雰囲気とする。図１は、遊離Ｃａ
Ｏを３．２重量％含有する転炉スラグを水蒸気雰囲気下
で２４時間エージングした試料（エージング曲線１）、
水蒸気にＣＯ2 を３ｖｏｌ％添加した雰囲気下で２４時
間エージングした試料（エージング曲線２）及び水蒸気
雰囲気下で２３時間エージング後水蒸気にＣＯ2 を３ｖ
ｏｌ％添加した雰囲気下でさらに１時間エージングした
試料（エージング曲線３）のＪＩＳ Ａ ５０１５によ
り測定した水浸膨張率の経時変化を示すグラフである。
水蒸気雰囲気下でエージングした試料は、膨張が養生７
日で停止するが、水蒸気とＣＯ2 の混合雰囲気下でエー
ジングした試料は３０日でも停止せず、膨張性が安定化
しにくい。一方、水蒸気雰囲気下で２３時間エージング
後水蒸気にＣＯ2 を３ｖｏｌ％混合した雰囲気下でさら
に１時間エージングした試料は、水蒸気雰囲気だけの試
料と同様に膨張が７日で停止し、膨張性を安定化し易
い。Ca (OH) 2 + CO 2 → CaCO 3 + H 2 O (1) Mg (OH) 2 + CO 2 → MgCO 3 + H 2 O (2) According to the stabilization treatment method for steelmaking slag of the present invention, After stabilizing the expansivity of the slag by steam aging, a mixed atmosphere of steam and CO 2 gas is created. Figure 1 shows free Ca
A sample obtained by aging converter slag containing 3.2% by weight of O in a steam atmosphere for 24 hours (aging curve 1),
A sample aged for 24 hours in an atmosphere in which 3 vol% of CO 2 is added to water vapor (aging curve 2) and after aging for 23 hours in a water vapor atmosphere, 3 v of CO 2 in water vapor
It is a graph which shows the time change of the water immersion expansion coefficient measured by JIS A 5015 of the sample (aging curve 3) which aged for 1 hour in the atmosphere which added ol%.
The sample aged in a steam atmosphere is cured by expansion.
Although it stops after a day, the sample aged in a mixed atmosphere of water vapor and CO 2 does not stop even after 30 days, and the expandability is difficult to stabilize. On the other hand, the sample aged in the steam atmosphere for 23 hours and further aged in the atmosphere in which CO 2 was mixed with 3 vol% of CO 2 for 1 hour, the expansion stopped in 7 days like the sample only in the steam atmosphere, and the expandability was stabilized. Easy to convert.
【００１０】この理由を以下に説明する。最初から水蒸
気とＣＯ2 の混合雰囲気でエージングすると、スラグ表
面層でＣａＣＯ3 及びＭｇＣＯ3 が生成し、これらがス
ラグ表面層を覆うことになる。その結果、スラグ表面が
硬化し、スラグ表面から内部に水蒸気が拡散しにくくな
り、スラグ内部に存在する遊離ＣａＯ及び遊離ＭｇＯが
それぞれＣａ（ＯＨ）2 、Ｍｇ（ＯＨ）2 として安定化
されずにそのまま残る。したがって、養生３０日でも膨
張が停止せず、安定化しにくい。このようなスラグを路
盤材に使用した場合、施工直後は問題を生じないが、徐
々に膨張する結果、施工後数年経過してから表面に凹凸
を生じ問題となる。そこで、まず水蒸気だけの雰囲気下
でエージングしてスラグの膨張性を安定化した後、水蒸
気とＣＯ 2 ガスの混合雰囲気でエージングすることによ
り、生成したＣａ（ＯＨ）2 及びＭｇ（ＯＨ）2 をそれ
ぞれＣａＣＯ3 、ＭｇＣＯ3 として炭酸化し安定化する
ことができる。The reason for this will be described below. Water vapor from the beginning
Qi and CO2 When aging in a mixed atmosphere of
CaCO in the surface layer3 And MgCO3 Are generated by
It will cover the rug surface layer. As a result, the slag surface is
Hardens and makes it difficult for water vapor to diffuse from the slag surface to the inside.
The free CaO and free MgO present inside the slag
Ca (OH) respectively2 , Mg (OH)2 Stabilized as
It remains as it is. Therefore, even after 30 days of curing
The tension does not stop and is difficult to stabilize. Road like this slug
When used as a board material, there is no problem immediately after construction,
As a result of various expansion, unevenness on the surface after a few years after construction
Causes problems. So, first in an atmosphere of only steam
After aging to stabilize the expansion of the slag, it is steamed with water.
Qi and CO 2 By aging in a mixed gas atmosphere
Generated Ca (OH)2 And Mg (OH)2 The it
Each CaCO3 , MgCO3 Carbonate and stabilize as
be able to.
【００１１】鉄鋼スラグを道路用路盤材として使用する
ためには、ＪＩＳ Ａ ５０１５により、１０日間の水
浸膨張率を１．５％以下に安定するように規定されてい
る。本発明においては、前述のように水蒸気雰囲気下で
膨張性を安定化した後、水蒸気とＣＯ2 ガスの混合雰囲
気下にするが、膨張性を安定化するという意味は、ＪＩ
Ｓ Ａ ５０１５に規定されているように水浸膨張率を
１．５％以下にすることである。In order to use steel slag as a roadbed material for roads, JIS A 5015 stipulates that the water immersion expansion coefficient should be stable at 1.5% or less for 10 days. In the present invention, the expansivity is stabilized in a steam atmosphere as described above, and then the mixed atmosphere of steam and CO 2 gas is used.
The water immersion expansion coefficient is 1.5% or less as specified in S A 5015.
【００１２】水蒸気とＣＯ2 ガスの混合雰囲気にする理
由は、高温に保って炭酸化反応を促進させるためであ
り、ＣＯ2 ガスだけの場合には雰囲気の温度が低くな
り、Ｃａ（ＯＨ）2 及びＭｇ（ＯＨ）2 の炭酸化が促進
されず、効率が悪いためである。水蒸気としては１００
℃１気圧の水蒸気を用いる。ＣＯ2 ガスの添加率につい
ては、特に限定されないが、１００℃１気圧の水蒸気に
対して外割で１〜１００ｖｏｌ％添加すると好適であ
る。１ｖｏｌ％未満ではＣａ（ＯＨ）2 及びＭｇ（Ｏ
Ｈ）2 の炭酸化が促進されにくく、また１００ｖｏｌ％
より多いと雰囲気の温度が８０℃以下に下がり炭酸化が
促進されにくいからである。The reason why the mixed atmosphere of water vapor and CO 2 gas is used is to keep the temperature high to promote the carbonation reaction, and when only CO 2 gas is used, the temperature of the atmosphere becomes low and Ca (OH) 2 And the carbonation of Mg (OH) 2 is not promoted and the efficiency is low. 100 as water vapor
Steam of 1 atm in pressure is used. The addition rate of CO 2 gas is not particularly limited, but it is preferable to add 1 to 100 vol% as an outer percentage to steam at 100 ° C. and 1 atm. If it is less than 1 vol%, Ca (OH) 2 and Mg (O
H) 2 is less likely to be carbonated, and 100 vol%
This is because if it is more than that, the temperature of the atmosphere falls to 80 ° C. or lower and carbonation is not promoted easily.
【００１３】本発明において使用されるＣＯ2 ガスは、
純ＣＯ2 ガスだけでなく、ボイラー排ガス、加熱炉排ガ
スその他、例えばＣＯ2 を２ｖｏｌ％以上含有するよう
なガスを使用することができ、経済的にも本発明の有効
性を最大限に発揮することができる。排ガスを混合する
際、雰囲気の温度を８０℃以上にするためには、水蒸気
分圧を０．５気圧以上にする必要がある。したがって、
炭酸化を促進するためには２％以上のＣＯ2 を含有する
排ガスを用いる必要がある。The CO 2 gas used in the present invention is
Not only pure CO 2 gas, but also boiler exhaust gas, heating furnace exhaust gas, and other gases containing, for example, 2 vol% or more of CO 2 can be used, and the effectiveness of the present invention is maximized economically. be able to. When mixing the exhaust gas, the water vapor partial pressure must be 0.5 atm or more in order to keep the temperature of the atmosphere at 80 ° C. or more. Therefore,
Exhaust gas containing 2% or more of CO 2 must be used to promote carbonation.
【００１４】また、本発明では水蒸気とＣＯ2 ガスの混
合雰囲気下で１時間以上保持する必要がある。１時間未
満では炭酸化反応が粒子内部まで十分進行しないので不
可である。余り長時間この雰囲気下に保持しても反応が
完了した後は無駄となるだけである。Further, according to the present invention, it is necessary to hold the mixture in a mixed atmosphere of water vapor and CO 2 gas for 1 hour or more. If it is less than 1 hour, the carbonation reaction does not proceed sufficiently to the inside of the particles, which is not possible. Even if it is kept in this atmosphere for a very long time, it is simply wasted after the reaction is completed.
【００１５】[0015]
【実施例】次に、本発明の実施例を説明する。表１は本
実施例の実験に供した製鋼スラグの化学組成である。実
験に供した製鋼スラグは、遊離ＣａＯを１．３５重量％
含む溶銑予備処理スラグ及び遊離ＣａＯを５．７４重量
％含む転炉スラグである。これらのスラグは路盤材とし
て規定された粒度になるように粉砕後実験に供した。Next, embodiments of the present invention will be described. Table 1 shows the chemical composition of the steelmaking slag used in the experiment of this example. The steelmaking slag used in the experiment contained 1.35% by weight of free CaO.
It is a hot metal pretreatment slag containing and a converter slag containing 5.74% by weight of free CaO. These slags were crushed so as to have a specified particle size as a roadbed material and then subjected to an experiment.
【００１６】これらのスラグに表２に示す雰囲気化でエ
ージング処理を施した。エージング処理後、ＪＩＳ Ａ
５０１５による水浸膨張率の測定及び試料を重量比１
０倍の純水に浸漬し、ＪＩＳ Ａ ５０１５による水浸
膨張率の測定及び試料を重量比１０倍の純水に浸漬し、
試料浸漬６時間後の浸漬水のｐＨを測定した。これらの
結果を表３に示す。なお、膨張率は養生１０日及び３０
日の値を示している。浸漬水のｐＨは、比較例−１、比
較例−２に示すように、水蒸気エージングだけでは溶銑
予備処理スラグが１１．６、転炉スラグが１２．５と高
い。また、比較例−３、比較例−４、比較例−５に示す
ように、最初から水蒸気にＣＯ 2 を添加してエージング
すると浸漬水のｐＨは１０以下になるが、養生３０日の
膨張率が養生１０日の膨張率よりも高くなっている。即
ち、膨張性が安定化しにくい。一方、実施例−１から実
施例−７に示すように水蒸気だけでエージングした後、
水蒸気にＣＯ2 ガスを添加してさらに１時間以上エージ
ングすることにより、膨張性を安定化し、かつ浸漬水の
ｐＨを１０以下にすることができる。These slags were exposed to the atmosphere shown in Table 2
Aging treatment. After aging treatment, JIS A
5015 water immersion expansion coefficient measurement and sample weight ratio 1
Immerse in 0 times pure water and submerge in JIS A 5015
Measurement of expansion coefficient and dipping the sample in pure water with a weight ratio of 10 times,
The pH of the immersion water 6 hours after the immersion of the sample was measured. these
Table 3 shows the results. The expansion rate is 10 days and 30 days for curing.
Indicates the day value. The pH of the immersion water is Comparative Example-1,
As shown in Comparative Example-2, hot metal aging alone produces hot metal
Pretreatment slag is 11.6, converter slag is 12.5 and high
Yes. Moreover, it shows in the comparative example-3, the comparative example-4, and the comparative example-5.
As you can see, 2 And aging
Then the pH of the immersion water will be 10 or less, but 30 days of curing
The expansion rate is higher than the expansion rate of 10 days of curing. Immediately
The expansion is difficult to stabilize. On the other hand, from Example-1
After aging only with steam as shown in Example-7,
CO to steam2 Add gas and age for more than 1 hour
Stabilizes the swelling property by
The pH can be 10 or less.
【００１７】従来、スラグと接触した雨水等の水がＯＨ
- イオンにより約ｐＨ１０以上のアルカリ性になる問題
があったが、本発明により浸漬水のｐＨを１０以下にす
ることができる。Conventionally, water such as rainwater contacting the slag is OH.
- there was a problem to be approximately pH10 or more alkaline by ion, the pH of the steep water by the present invention can be made 10 or less.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】[0020]
【表３】 [Table 3]
【００２１】[0021]
【発明の効果】以上説明したように、製鋼スラグを大気
圧下で水蒸気雰囲気下でエージング処理して膨張性を安
定化した後、水蒸気とＣＯ2 ガスの混合雰囲気下で１時
間以上保持することにより、雨水等の接触によるアルカ
リ水の発生を防止し、路盤材等に適したスラグにするこ
とができる。As described above, the steelmaking slag is subjected to aging treatment under atmospheric pressure in a steam atmosphere to stabilize its expansivity, and then held in a mixed atmosphere of steam and CO 2 gas for 1 hour or more. Thereby, generation of alkaline water due to contact with rainwater or the like can be prevented, and a slag suitable for a roadbed material or the like can be obtained.
【図面の簡単な説明】[Brief description of drawings]
【図１】養生時間と膨張率との関係を示すグラフであ
る。FIG. 1 is a graph showing the relationship between curing time and expansion rate.
１、２、３ エージング曲線 1, 2, 3 aging curve
Claims (1)
囲気下でエージング処理して膨張性を安定化した後、水
蒸気とＣＯ2 ガスの混合雰囲気下で１時間以上保持する
ことを特徴とする製鋼スラグの安定化処理方法。1. A steelmaking slag characterized by holding the steelmaking slag in a mixed atmosphere of steam and CO 2 gas for 1 hour or more after aging treatment of the steelmaking slag under atmospheric pressure in a steam atmosphere to stabilize expansion properties. Stabilization treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6022695A JPH08259282A (en) | 1995-03-20 | 1995-03-20 | Stabilization treatment of steel making slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6022695A JPH08259282A (en) | 1995-03-20 | 1995-03-20 | Stabilization treatment of steel making slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08259282A true JPH08259282A (en) | 1996-10-08 |
Family
ID=13136051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6022695A Withdrawn JPH08259282A (en) | 1995-03-20 | 1995-03-20 | Stabilization treatment of steel making slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08259282A (en) |
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|---|---|---|---|---|
| JP2002308662A (en) * | 2001-04-11 | 2002-10-23 | Kawasaki Steel Corp | Production process of slag hardened body |
| WO2004108624A1 (en) * | 2003-06-09 | 2004-12-16 | Nippon Steel Corporation | Method for stabilization treatment of steel making slag, stabilized steel making slag, and material and method for environmental preservation of water area using said slag |
| JP2007031220A (en) * | 2005-07-28 | 2007-02-08 | Nippon Steel Corp | Method of granulating slag and granulated slag |
| JP2008247665A (en) * | 2007-03-30 | 2008-10-16 | Iwate Industrial Research Center | Method of producing iron-and-steel slag fertilizer |
| JP2009062222A (en) * | 2007-09-06 | 2009-03-26 | Daido Steel Co Ltd | Aggregate using reduced slag and method of producing the same |
| JP2011051889A (en) * | 2010-10-18 | 2011-03-17 | Jfe Steel Corp | Method for manufacturing slag hardened body |
| JP2011203120A (en) * | 2010-03-25 | 2011-10-13 | Nippon Steel Corp | Method for discriminating slag fine particles, and carbonation treatment apparatus |
| JP2013208571A (en) * | 2012-03-30 | 2013-10-10 | Nippon Steel & Sumitomo Metal Corp | Method for treating civil engineering and construction material |
| JP2013224229A (en) * | 2012-04-20 | 2013-10-31 | Kobe Steel Ltd | Method for modifying slag material surface |
| JP2014201460A (en) * | 2013-04-02 | 2014-10-27 | 株式会社神戸製鋼所 | Method of modifying surface of iron and steel slag and method of modifying surface of slag mixture |
| KR20220101477A (en) * | 2021-01-11 | 2022-07-19 | 전남대학교산학협력단 | Manufacturing method and composition for magnesium oxide containing fill material, and treatment method for magnesium oxide containing industrial by-product |
| JP2022143905A (en) * | 2021-03-18 | 2022-10-03 | Ｊｆｅスチール株式会社 | Manufacturing method of slag roadbed material and its slag roadbed material |
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-
1995
- 1995-03-20 JP JP6022695A patent/JPH08259282A/en not_active Withdrawn
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|---|---|---|---|---|
| JP4644965B2 (en) * | 2001-04-11 | 2011-03-09 | Ｊｆｅスチール株式会社 | Method for producing hardened slag |
| JP2002308662A (en) * | 2001-04-11 | 2002-10-23 | Kawasaki Steel Corp | Production process of slag hardened body |
| WO2004108624A1 (en) * | 2003-06-09 | 2004-12-16 | Nippon Steel Corporation | Method for stabilization treatment of steel making slag, stabilized steel making slag, and material and method for environmental preservation of water area using said slag |
| KR100732732B1 (en) * | 2003-06-09 | 2007-06-29 | 신닛뽄세이테쯔 카부시키카이샤 | Method for stabilization treatment of steel making slag, stabilized steel making slag, and material and method for environmental preservation of water area using said slag |
| JP2007031220A (en) * | 2005-07-28 | 2007-02-08 | Nippon Steel Corp | Method of granulating slag and granulated slag |
| JP4608382B2 (en) * | 2005-07-28 | 2011-01-12 | 新日本製鐵株式会社 | Slag granulation method and granulated slag |
| JP2008247665A (en) * | 2007-03-30 | 2008-10-16 | Iwate Industrial Research Center | Method of producing iron-and-steel slag fertilizer |
| JP2009062222A (en) * | 2007-09-06 | 2009-03-26 | Daido Steel Co Ltd | Aggregate using reduced slag and method of producing the same |
| JP2011203120A (en) * | 2010-03-25 | 2011-10-13 | Nippon Steel Corp | Method for discriminating slag fine particles, and carbonation treatment apparatus |
| JP2011051889A (en) * | 2010-10-18 | 2011-03-17 | Jfe Steel Corp | Method for manufacturing slag hardened body |
| JP2013208571A (en) * | 2012-03-30 | 2013-10-10 | Nippon Steel & Sumitomo Metal Corp | Method for treating civil engineering and construction material |
| JP2013224229A (en) * | 2012-04-20 | 2013-10-31 | Kobe Steel Ltd | Method for modifying slag material surface |
| JP2014201460A (en) * | 2013-04-02 | 2014-10-27 | 株式会社神戸製鋼所 | Method of modifying surface of iron and steel slag and method of modifying surface of slag mixture |
| KR20220101477A (en) * | 2021-01-11 | 2022-07-19 | 전남대학교산학협력단 | Manufacturing method and composition for magnesium oxide containing fill material, and treatment method for magnesium oxide containing industrial by-product |
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