JPS6148470A - Use of steel slag - Google Patents

Use of steel slag

Info

Publication number
JPS6148470A
JPS6148470A JP59169628A JP16962884A JPS6148470A JP S6148470 A JPS6148470 A JP S6148470A JP 59169628 A JP59169628 A JP 59169628A JP 16962884 A JP16962884 A JP 16962884A JP S6148470 A JPS6148470 A JP S6148470A
Authority
JP
Japan
Prior art keywords
slag
steelmaking slag
water
sand
calcium chloride
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
Application number
JP59169628A
Other languages
Japanese (ja)
Inventor
泊 正雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Jiryoku Senko Co Ltd
Original Assignee
Nippon Jiryoku Senko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Jiryoku Senko Co Ltd filed Critical Nippon Jiryoku Senko Co Ltd
Priority to JP59169628A priority Critical patent/JPS6148470A/en
Publication of JPS6148470A publication Critical patent/JPS6148470A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、冷却後、膨張、崩壊性を有しているので、エ
ージング処理後、一部路盤材等へ利用されているが、大
部分は埋立廃棄処分されているのが現状である製鋼スラ
グの有効利用に関するものである。
[Detailed description of the invention] The present invention has the property of expanding and collapsing after cooling, so after aging treatment, it is partially used for roadbed materials, etc., but most of it is disposed of in landfills. This is related to the current effective use of steelmaking slag.

製鋼スラグには各種の物があるが、本願発明では転炉ス
ラグ、電気炉スラグ(還元期)を対象とする。
Although there are various types of steelmaking slag, the present invention targets converter slag and electric furnace slag (reducing stage).

一般に製鋼スラグは2CaO・5i02 、F・CaO
、F・MgO、2CaO−Fe、コ、Oj、 4CaO
・人J!aO)  FexOD、  Feg04  、
 Fe503、FeO等を含有しているので、潜在水硬
性を有さず、高炉スラグは除冷処理するとメリライト(
2CaO−人ム03SiOx〜2CaO−MgO−2S
iOzの中間成分)とCaSを有し、急冷゛するとガラ
ス主体となり、潜在水硬性を有して、高炉セメント混和
材等に利用されている。
Generally, steelmaking slag is 2CaO・5i02, F・CaO
, F.MgO, 2CaO-Fe, Ko, Oj, 4CaO
・People J! aO) FexOD, Feg04,
Because it contains Fe503, FeO, etc., it has no latent hydraulic properties, and when blast furnace slag is slowly cooled, it becomes melilite (
2CaO-MgO-2S
It has an intermediate component of iOz) and CaS, and when rapidly cooled, it becomes mainly glass, has latent hydraulic properties, and is used as a blast furnace cement admixture.

現在、これら製鋼スラグはノロ鍋に受け、約20〜12
時間後に排出されているが約200〜300℃になると
2CaO・SiOがβ→γに転移するときに膨張崩壊し
たり、F−CaO、F−MgOを含有するため膨張崩壊
性を有しているので、上記の通り大部分は埋立廃棄され
ている。
Currently, these steelmaking slags are collected in a slag ladle, and are heated to about 20 to 12
It is discharged after some time, but when the temperature reaches about 200 to 300℃, it expands and collapses when 2CaO/SiO transitions from β to γ, and because it contains F-CaO and F-MgO, it expands and collapses. Therefore, as mentioned above, most of it is disposed of in landfills.

本発明は上述の欠点を解消し有効利用する方法に係り、
al〜β−2C&O/・SiO+主体又はガラス主体、
あるいは1部α′〜β−2CaO、・Si3ユとガラス
主体になる様に空気流で粗砕し乍ら水中に落下、水滓に
して(以後風水滓化物と称する)、乾燥後粉砕し混練す
ると水硬性を見い出した。
The present invention relates to a method for solving the above-mentioned drawbacks and effectively utilizing the problems.
al~β-2C&O/・SiO+ main body or glass main body,
Alternatively, 1 part α'~β-2CaO, ・Si3U is coarsely crushed with an air flow until it becomes glass-based, and then dropped into water to form a water slag (hereinafter referred to as feng shui slag), dried, crushed, and kneaded. Then, they discovered hydraulic properties.

又、その粉末度が大きい程、急速に硬化することも見出
した。
It has also been found that the greater the powderiness, the more rapidly it hardens.

なお、転炉スラグと言っても化学成分上、鉄分がかなり
少ないものも発生しているし、電気炉スラグも酸化期と
還元期を一緒に出す(ワンスラグ方法)方法もあり、鉄
分が成る程度含有され、除冷すると、2CaO・Fez
O3,4C&O入ム02・Feユ0−1が生成、   
する成分に改質処理後、風水滓化物の方が強度も出る。
Furthermore, even though it is called converter slag, due to its chemical composition, there is also slag that has a very low iron content, and electric furnace slag also has a method of producing both the oxidation and reduction phases (one slag method), which only contains iron. When it is slowly cooled, 2CaO・Fez
O3,4C&O input 02/Feyu 0-1 is generated,
After modification of the ingredients, Feng Shui slag becomes stronger.

化学成分範囲がかなり広いし、高塩基度のため融点が高
いので風、水滓化率が減少する場合もある。
It has a fairly wide chemical composition range and has a high melting point due to its high basicity, which may reduce wind and water slag formation rates.

さらに、珪酸塩質の岩石・鉱物等を添加し、α′〜β−
2CaO・SiOx主体から2CaO・SiOユ〜2C
a01Jg0・2SiOユ主体に改質すると融点、粘質
は下り、風、水滓化率も向上するしガラス主体となり、
乾燥後粉砕してアルカリ刺激剤(例えばCaO、Ca 
(OH)ユ。
Furthermore, by adding silicate rocks and minerals, α′ to β−
From 2CaO/SiOx main body to 2CaO/SiO~2C
When modified to mainly a01Jg0.2SiO, the melting point and viscosity decrease, the wind and water slag formation rates improve, and the material becomes glass-based.
After drying, it is crushed to give an alkaline stimulant (e.g. CaO, Ca
(OH) Yu.

セメント等)を少量添加して、水を加えて混練すると水
硬性を有することを見い出したし、ヘドロ固化強度の発
現を均一化するために珪酸塩質の岩石・鉱物等を添加す
るものである。
It was discovered that by adding a small amount of cement, etc.) and kneading it with water, it has hydraulic properties, and in order to equalize the development of sludge solidification strength, silicate rocks, minerals, etc. are added. .

添加物としてはklユ05 、SiOユ単味でも良いが
、溶融温度が高く反応が生起し難いという欠点があるた
めに、Si3ユ、J工03 、Fe、01等を適量含有
する物を、添加する事により溶融温度の低下を促し、反
応が十分に起こる様にしたものである。
As additives, it is possible to use a single additive such as KL-05 or SiO-Y, but since the melting temperature is high and it is difficult to cause a reaction, additives containing appropriate amounts of Si3-0, J-03, Fe, 01, etc. are used. By adding it, the melting temperature is lowered and the reaction occurs sufficiently.

添加物の添加方法は 1、製練炉内に製練の最初又は途中から投入する。How to add additives 1. Pour into the smelting furnace from the beginning or during the smelting process.

2、製練炉内に出湯後、投入する。2. After tapping, pour into the smelting furnace.

3、製練炉から排出する溶滓流に接して投入する。(同
時投入) 4、製練炉から排滓鍋への溶滓流の落下位置と離して投
入する。
3. Pour into contact with the slag flow discharged from the smelting furnace. (Simultaneous input) 4. Inject at a distance from the falling position of the slag flow from the smelting furnace to the slag ladle.

5、排滓鍋の敷滓の代用として使用する。5. Use as a substitute for slag in a slag pot.

6、排滓鍋内で溶滓とサンドイッチ状になる様に投入す
る。
6. Pour the slag into the slag pan so that it forms a sandwich with the slag.

γ、3.4,5,6.の操作で投入し、ランスパイプ状
物を挿入し、バブリングガス(0λ、N2、又は人ir
 )を吹き込んで、拡散させる。
γ, 3.4, 5, 6. Insert a lance pipe, and add bubbling gas (0λ, N2, or human IR).
) and diffuse it.

8、スラグ加熱炉(電気炉方式、0λ気体燃料炉方式)
に−郵便化したスラグを含む、溶融スラグと添加物を投
入する。
8. Slag heating furnace (electric furnace method, 0λ gas fuel furnace method)
- Charge molten slag and additives, including postalized slag.

方法がある。There is a way.

本発明は、上記の製鋼スラグを有効利用するための方法
を提供せんとするものであり、その要旨は、溶融状態の
製鋼スラグに、珪石及び又は珪酸白土の如きアルカリ可
溶性のシリカやアルミナに富む物から成る混和材、並び
に塩化カルシウム添加混合した後に空気流で粗砕し乍ら
水中に落下せしむる処理を施すことを特徴とする製鋼ス
ラグの利用方法である。
The present invention aims to provide a method for effectively utilizing the above-mentioned steelmaking slag, and its gist is to provide a method for effectively utilizing the above-mentioned steelmaking slag. This is a method of utilizing steelmaking slag, which is characterized by subjecting the steelmaking slag to an admixture consisting of a mixture of calcium chloride and calcium chloride, which is then crushed by an air stream and then allowed to fall into water.

尚、改質材とし花崗岩、砂岩、粘板岩、・・・を同時に
混練するといっそう効果的である。
Incidentally, it is even more effective to simultaneously knead granite, sandstone, slate, etc. as modifying materials.

以下に本発明方法の作用効果を確認するために行った実
験及びその効果を示す。
Experiments conducted to confirm the effects of the method of the present invention and their effects will be shown below.

実験に用いた試料の化学分析値、性状を第1表に示す。Table 1 shows the chemical analysis values and properties of the samples used in the experiment.

第1表 *冷却の過程でダスティングを起こして崩壊するので1
00Xとした。他はASTM法でオートクレーブ処理で
測定した。
Table 1 *Due to dusting and disintegration during the cooling process, 1
It was set to 00X. Others were measured by autoclave treatment using the ASTM method.

*1崩壊率(に)は製鋼スラグ(人)は100X、製鋼
スラグ(B)は35にであった。
*1 The disintegration rate was 100X for steelmaking slag (human) and 35X for steelmaking slag (B).

上記の試料を恒温乾燥機(105〜110℃に保持)中
で24時間以上乾燥後、電融マグネシアルツボに500
g入れ、シリコニット電気炉(1550℃に保持)で再
溶解して炉外に取り出してルツボを傾けながら圧縮空気
をノズルから出して吹き飛ばし、水槽内に落下させて、
風水滓化物を作り、乾燥後、約200メツシユ以下に粉
砕し、刺激剤として、塩化カルシウム(市販品を使用)
、混和材として、珪酸白土、珪石(恒温乾燥機にて10
5〜110℃で乾燥後、約200メツシユ以下に粉砕)
を混合し、この試料を水分30.5gのヘドロ(カオリ
ナイト、モンモリロナイト、α−石英主体)(ただし、
刺激剤は水に溶解して)にモルタル練り鉢で混合し、土
質試験モールドにランマーで三層に分けて詰め(JIS
法で)1ケ月間湿空養生後、圧縮強さを調べた結果を第
4表に示す。なお、試作風水滓化物の化学成分、性状を
第2表に添加混和材の化学成分を第3表に示す。
After drying the above sample in a constant temperature dryer (maintained at 105-110°C) for more than 24 hours, it was placed in an electro-fused magnesia crucible with 500
g, remelted in a siliconite electric furnace (maintained at 1550°C), taken out of the furnace, tilted the crucible, blew compressed air out of the nozzle, and dropped it into a water tank.
Make feng shui slag, dry it, crush it to less than 200 mesh, and use calcium chloride (commercially available) as a stimulant.
, As an admixture, silicate clay, silica stone (10% in a constant temperature dryer)
After drying at 5-110℃, grind to approximately 200 mesh or less)
This sample was mixed with sludge (mainly kaolinite, montmorillonite, α-quartz) with a water content of 30.5 g (but
The stimulant is dissolved in water) and mixed in a mortar mixing pot, and packed into a soil test mold in three layers with a rammer (JIS
Table 4 shows the results of examining the compressive strength after curing in humid air for one month. The chemical composition and properties of the prototype feng shui sludge are shown in Table 2, and the chemical composition of the additive admixture is shown in Table 3.

第2表 第3表 第4表 以上性べてきたように、本願発明方法によれば溶融状態
で珪酸塩質の岩石、鉱物等を添加し溶融拡散反応を生起
させるとさせると融点粘性が低下し、風砕装置にて、風
砕後、水中にて水滓化すると、生成鉱物もガラス主体に
変わり、ヘドロ等の硬化も未添加の水滓物より強くなる
し、高炉水滓粉末を用いた場合と同様にヘドロ等を硬化
させることも出来るし、むしろ強度は強い結果を得た。
Table 2 Table 3 Table 4 As mentioned above, according to the method of the present invention, when silicate rocks, minerals, etc. are added in a molten state to cause a melt diffusion reaction, the melting point viscosity decreases. However, when it is turned into water slag in water after being crushed by wind in a wind crusher, the minerals produced change to mainly glass, and the hardening of sludge becomes stronger than that of water slag without additives. It was also possible to harden sludge, etc. in the same way as in the case of hardening, and the strength was rather strong.

なお、普通、高炉セメント等と同様に団鉱やペレットの
バインダーとしても使用可能である。
In addition, it can also be used as a binder for briquettes and pellets, similar to blast furnace cement.

遡 手続ネ山正吉 (自発) 昭和59年9月44日 昭和59年持重願 第169628号 2、発明の名称 製鋼スラグの利用方法 3、補正をする者 事件との関係  特許出願人 住所 北九州市小倉北区馬借3丁目6番42号 氏名 日本磁力選鉱株式会社 代表者 原1)明徴 4、代理人 住所 福岡市博多区博多駅東1丁目1O−27(2)明
細書の「発明の詳細な説明の欄」(1)明細書の「特許
請求の範囲の欄」を下記の通りに補正する。
Retroactive procedure Neyama Masakichi (voluntary) September 44, 1980, 1981 Privilege No. 169628 2, Name of the invention Method of utilizing steelmaking slag 3, Relationship with the person making the amendment Patent applicant address Kokura, Kitakyushu City 3-6-42, Magakure, Kita-ku Name: Japan Magnetic Mineral Sensing Co., Ltd. Representative: Hara 1) Meisho 4, Agent Address: 1-1O-27, Hakataeki Higashi, Hakata-ku, Fukuoka City (2) "Detailed description of the invention" in the specification (1) The "Claims column" of the specification shall be amended as follows.

[1,溶融状態の製鋼スラグを空気流で粗砕し乍ら水中
に落下せしむる処理をした′〜に、珪石及び又は珪酸白
土の如きアルカリ可溶性のシリカやアルミナに富む物か
ら成る混和材、並びに塩化カルシウム至添加混合1にと
を特徴とする製鋼スラグの利用方法。
[1. Molten steelmaking slag is crushed by an air stream and then allowed to fall into water, and then an admixture consisting of an alkali-soluble silica- and alumina-rich substance such as silica stone and/or silicate clay is added. , and a mixture of calcium chloride and calcium chloride.

2、溶融状態の製鋼スラグに花崗岩、砂岩、粘U珪石及
び又は珪酸白土の如きアルカリ可溶性のシリカやアルミ
ナに富む物から成る混和材と、塩化カルシウムとを混合
することを特徴とする製鋼スラブの利用方法。」
2. A steelmaking slab characterized by mixing molten steelmaking slag with an admixture consisting of an alkali-soluble silica- and alumina-rich material such as granite, sandstone, silica and/or silicate clay, and calcium chloride. How to Use. ”

Claims (1)

【特許請求の範囲】 1、溶融状態の製鋼スラグに、珪石及び又は珪酸白土の
如きアルカリ可溶性のシリカやアルミナに富む物から成
る混和材、並びに塩化カルシウム添加混合した後に空気
流で粗砕し乍ら水中に落下せしむる処理を施すことを特
徴とする製鋼スラグの利用方法。 2、溶融状態の製鋼スラグに、珪石及び又は珪酸白土の
如きアルカリ可溶性のシリカやアルミナに富む物から成
る混和材と、塩化カルシウムと、花崗岩、砂岩、粘板岩
、鋳物廃砂、レンガクズ、石炭廃、シラス、閃緑岩風化
物、砂、カラミ、ガラスクズ、脱珪スラグ、スケール、
鉄鉱石、砂鉄、頁岩、高炉スラグ、赤泥の群より選ばれ
る少なくとも1種以上から成る改質材を添加混合した後
に空気流で粗砕し乍ら水中に落下せしむる処理を施すこ
とを特徴とする製鋼スラグの利用方法。
[Scope of Claims] 1. An admixture consisting of an alkali-soluble silica- and alumina-rich substance such as silica stone and/or silicate clay, and calcium chloride are added and mixed to molten steelmaking slag, and then coarsely crushed with an air stream. A method of utilizing steelmaking slag, which is characterized by subjecting it to a treatment of dropping it into water. 2. Adding to molten steelmaking slag an admixture consisting of an alkali-soluble silica- and alumina-rich material such as silica stone and/or silicate clay, calcium chloride, granite, sandstone, slate, foundry waste sand, brick waste, coal waste, Shirasu, weathered diorite, sand, karami, glass scum, desiliconization slag, scale,
After adding and mixing a modifying material consisting of at least one selected from the group of iron ore, iron sand, shale, blast furnace slag, and red mud, a treatment is performed in which the material is crushed by an air flow and then allowed to fall into water. Features of how to use steelmaking slag.
JP59169628A 1984-08-13 1984-08-13 Use of steel slag Pending JPS6148470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59169628A JPS6148470A (en) 1984-08-13 1984-08-13 Use of steel slag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59169628A JPS6148470A (en) 1984-08-13 1984-08-13 Use of steel slag

Publications (1)

Publication Number Publication Date
JPS6148470A true JPS6148470A (en) 1986-03-10

Family

ID=15890022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59169628A Pending JPS6148470A (en) 1984-08-13 1984-08-13 Use of steel slag

Country Status (1)

Country Link
JP (1) JPS6148470A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761183A (en) * 1987-01-20 1988-08-02 Geochemical Corporation Grouting composition comprising slag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761183A (en) * 1987-01-20 1988-08-02 Geochemical Corporation Grouting composition comprising slag

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