JP2000350977A - Method for solidifying granular steel-making slag - Google Patents
Method for solidifying granular steel-making slagInfo
- Publication number
- JP2000350977A JP2000350977A JP16473699A JP16473699A JP2000350977A JP 2000350977 A JP2000350977 A JP 2000350977A JP 16473699 A JP16473699 A JP 16473699A JP 16473699 A JP16473699 A JP 16473699A JP 2000350977 A JP2000350977 A JP 2000350977A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- steelmaking slag
- granular
- water
- steelmaking
- 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- Withdrawn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
- 239000002893 slag Substances 0.000 title claims abstract description 83
- 238000009628 steelmaking Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 21
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 7
- 239000010440 gypsum Substances 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 18
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 16
- 239000007787 solid Substances 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 4
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 12
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- 235000012255 calcium oxide Nutrition 0.000 description 6
- 229910001653 ettringite Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000011343 solid material Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉粒状製鋼スラグ
の固化方法に係わり、製鉄工程で大量に副生する粉粒状
の製鋼スラグの処理方法であって、路盤用材、建材土木
用材等の有用な無機質材料の製造に適用しうる技術であ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for solidifying powdery and granular steelmaking slag, and more particularly to a method for treating powdery and granular steelmaking slag which is produced as a by-product in a steelmaking process. This is a technique applicable to the production of various inorganic materials.
【０００２】[0002]
【従来の技術】一般に、製鋼スラグは、主成分として、
ＣａＯ，ＳｉＯ2，Ａｌ2Ｏ3を含有しているが、このう
ちＣａＯは，水と反応して膨脹破壊を起こすので、その
まま固めても、固形物として土木建築用材に利用するこ
とは困難である。これを有効利用するには、膨脹破壊し
ないような物質に予め変化させ、つまり粉粒体の安定を
図る必要がある。そのため、従来、種々の技術が開発さ
れているが、その１つに粉粒状の製鋼スラグを単独で、
あるいは他の物質（例えば、石膏、生石灰、セメント
等）を添加した混合物の形態で炭酸処理する技術があ
る。2. Description of the Related Art Generally, steelmaking slag is mainly composed of
It contains CaO, SiO 2 , and Al 2 O 3. Of these, CaO reacts with water to cause expansion and destruction, so it is difficult to use it as a solid material for civil engineering construction materials even if it is solidified as it is. is there. In order to make effective use of this, it is necessary to change in advance to a substance that does not cause expansion and destruction, that is, to stabilize the granular material. For this reason, various techniques have been developed in the past, and one of them is powdered steel slag alone.
Alternatively, there is a technique of performing carbonation in the form of a mixture to which another substance (eg, gypsum, quicklime, cement, or the like) is added.
【０００３】例えば、特開昭５８−７４５５９号公報
は、２．５ｍｍ以下の製鋼風砕スラグに水を加えた混練
物を炭酸化し、硬化体を製造する方法を、特公昭５６−
３８５４９号公報は８８μｍ以下の転炉スラグ粉末を加
圧成形し、高湿潤雰囲気中で炭酸ガス含有気体と接触反
応させて、高強度の成形品を製造する方法を提案してい
る。For example, Japanese Patent Application Laid-Open No. Sho 58-74559 discloses a method of producing a hardened product by carbonizing a kneaded material obtained by adding water to a steelmaking crushed slag having a diameter of 2.5 mm or less.
Japanese Patent No. 38549 proposes a method for producing a high-strength molded product by subjecting converter slag powder having a size of 88 μm or less to pressure molding and causing a contact reaction with a gas containing carbon dioxide in a highly humid atmosphere.
【０００４】また、特開昭４９−８８９２２号公報は、
転炉スラグ微粉末に消石灰又は生石灰を加えて水を添加
し、炭酸ガス含有気体と接触させる人造石の製造方法
を、特開昭５４−１３１６２４号公報は、５０μｍ以下
の石膏と１００μｍ以下の転炉スラグとを、ＣＯ2と水
蒸気を含む雰囲気中で炭酸化反応させる人工骨材の製造
方法を開示している。Japanese Patent Application Laid-Open No. 49-88922 discloses that
Japanese Patent Application Laid-Open No. 54-131624 discloses a method for producing artificial stone in which slaked lime or quick lime is added to converter slag fine powder, water is added thereto, and the mixture is brought into contact with a carbon dioxide-containing gas. A method for producing an artificial aggregate in which a furnace slag is subjected to a carbonation reaction in an atmosphere containing CO 2 and steam is disclosed.
【０００５】さらに、特公昭５６−３６１４７号公報
は、転炉スラグ粉末とポルトランド・セメントとの加圧
成形体を高湿潤雰囲気中で炭酸ガス含有気体と接触反応
させて高強度の成形品とする方法を、あるいは特公昭５
５−４３４２１号公報は、転炉スラグ粉末に糖類等を添
加し、加圧成形体を高湿潤雰囲気中で炭酸ガス含有気体
と接触反応させ、炭酸化した成形品を製造する方法を開
示している。[0005] Further, Japanese Patent Publication No. 56-36147 discloses a high-strength molded product obtained by causing a press-formed product of converter slag powder and Portland cement to react with a gas containing carbon dioxide in a highly humid atmosphere. How to do it
JP-A-5-43421 discloses a method for producing a carbonized molded product by adding sugars and the like to converter slag powder and causing a press-formed product to react with a gas containing carbon dioxide in a highly humid atmosphere. I have.
【０００６】加えて、特公昭５６−３１３０５号公報
は、５０ｍｍ以下の転炉スラグ等を、ＣＯ2ガスを導入
可能にしたオートクレーブ（高圧容器）内で加熱処理し
て、該スラグを骨材として安定化する技術を提案してい
る。In addition, Japanese Patent Publication No. 56-31305 discloses that a converter slag of 50 mm or less is heated in an autoclave (high-pressure vessel) into which CO 2 gas can be introduced, and the slag is used as aggregate. We propose stabilizing technology.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記し
た技術は、いずれも粉粒状の製鋼スラグを、炭酸ガスを
含有する気体あるいは炭酸水と接触させて、炭酸化し固
化するものであるが、実用上の固化物としては不十分な
ことがある。つまり、路盤材、建築土木用材に使用する
際、強度が不足して使用範囲が制限されたり、寿命が短
くて補修頻度が高いのが現状である。However, all of the above-mentioned technologies involve contacting powdery steelmaking slag with a gas containing carbon dioxide gas or carbonated water to carbonate and solidify it. Is sometimes insufficient as a solidified product. That is, when used for roadbed materials and building civil engineering materials, the strength is insufficient and the range of use is limited, or the service life is short and the repair frequency is high.
【０００８】本発明は、かかる事情に鑑み、路盤材、建
築土木用材等に使用しても、強度不足が起きない固形物
の製造可能な粉粒状製鋼スラグの固化方法を提案するこ
とを目的としている。The present invention has been made in view of the above circumstances, and has as its object to propose a method for solidifying powdery and granular steelmaking slag which can be used to produce solids without insufficient strength even when used for roadbed materials, building civil engineering materials, and the like. I have.
【０００９】[0009]
【課題を解決するための手段】発明者は、本発明の目的
を達成するため、従来技術の改良に鋭意努力し、その成
果を本発明に具現化した。Means for Solving the Problems In order to achieve the object of the present invention, the inventor worked diligently to improve the prior art and embodied the results in the present invention.
【００１０】すなわち、本発明は、粉粒状の製鋼スラグ
を高湿潤雰囲気中で炭酸ガスを含有する気体又は炭酸水
と接触反応させて炭酸化する製鋼スラグの固化方法にお
いて、前記炭酸化に引き続き、含水状態に保持するか又
は高圧水蒸気下で加熱することを特徴とする粉粒状製鋼
スラグの固化方法である。That is, the present invention provides a method for solidifying steelmaking slag in which powdery and granular steelmaking slag is carbonized by contacting and reacting with a gas containing carbon dioxide gas or carbonated water in a highly humid atmosphere. It is a method for solidifying a granular steelmaking slag characterized by keeping it in a water-containing state or heating it under high-pressure steam.
【００１１】また、本発明は、前記粉粒状の製鋼スラグ
に高炉水砕スラグの微粉末、石膏、セメント及びフライ
アッシュのいずれか１種類又は2種類以上を混合するこ
とを特徴とする粉粒状製鋼スラグの固化方法である。Further, the present invention is characterized in that one or more of granulated blast furnace granulated slag, gypsum, cement and fly ash are mixed with the granulated steelmaking slag. This is a method for solidifying slag.
【００１２】さらに、本発明は、前記粉粒状の製鋼スラ
グが、溶銑予備処理スラグ、転炉スラグ、電気炉スラ
グ、溶融還元炉スラグ、二次精錬スラグ、ステンレスス
ラグであり、加えて、前記粉粒状の製鋼スラグの粒径
が、５ｍｍ以下の粒子を５０重量％以上含有することを
特徴とする粉粒状製鋼スラグの固化方法でもある。Further, the present invention provides the above-mentioned powdery and granular steelmaking slag is a hot metal pretreatment slag, a converter slag, an electric furnace slag, a smelting reduction furnace slag, a secondary refining slag, and a stainless slag. It is also a method for solidifying a granular steelmaking slag, wherein the particle size of the granular steelmaking slag contains 50 mm% or more of particles having a particle size of 5 mm or less.
【００１３】本発明では、粉粒状の製鋼スラグ、あるい
は該スラグと他の添加物との混合物を炭酸化して、後述
するトバモライト相あるいはエトリンガイト相としてか
ら、水分の存在下又は高圧水蒸気下で加熱するようにし
たので、製鋼スラグ粒子間の隙間が従来より減少する。
その結果、スラグ粒子同士の結合を従来に比べて強固に
なり、固形物の強度が増大するようになる。In the present invention, the powdery steelmaking slag or the mixture of the slag and other additives is carbonated to form a tobermorite phase or ettringite phase, which will be described later, and then heated in the presence of moisture or under high-pressure steam. As a result, the gap between the steelmaking slag particles is reduced as compared with the related art.
As a result, the bonding between the slag particles becomes stronger than before, and the strength of the solid material increases.
【００１４】[0014]
【発明の実施の形態】以下、発明をなすに至った経緯を
交え、本発明の実施の形態を説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the circumstances leading to the invention.
【００１５】製鋼スラグは、主成分としてＣａＯ、Ａｌ
2Ｏ3を含有し、このうちＣａＯは水と反応して膨張破壊
を起こす。そのため、路盤材、建築土木用材として実用
に耐える固形物とするには、前記したように、膨張破壊
しない物質に予め変化させておく必要がある。前記従来
技術は、いずれも粉粒状の製鋼スラグを単独で、あるい
は添加物と混合し、炭酸ガスを含有する気体又は炭酸水
と接触反応させて固化するものであった。しかしなが
ら、発明者の研究によれば、炭酸化しただけでも、製鋼
スラグ粒子間を結合することができるが、全ての粒子間
を覆いつくすことはできない。発明者は、その原因を、
製鋼スラグ粒子間の隙間が大き過ぎると考えた。そし
て、その対策を研究し、粒子間の隙間をもっと狭めるこ
とに着眼し、炭酸化に引き続き水の存在下で加熱するこ
とを前記本発明としたのである。これにより、製鋼スラ
グ粒子同士を、より強固に結合でき、固形物の強度が向
上した。The steelmaking slag is mainly composed of CaO, Al
It contains 2 O 3 , of which CaO reacts with water to cause expansion failure. Therefore, in order to obtain a solid material that can be practically used as a roadbed material or a material for building civil engineering, it is necessary to previously change the material to a material that does not expand and break as described above. In the above-mentioned prior arts, the steelmaking slag in the form of powder alone is mixed alone or mixed with an additive and solidified by contact reaction with a gas containing carbon dioxide gas or carbonated water. However, according to the inventor's research, carbonation alone can bond between steelmaking slag particles, but cannot cover all of the particles. The inventor described the cause as
The gap between the steelmaking slag particles was considered to be too large. Then, the present inventors have studied the countermeasures, focused on narrowing the gap between the particles, and made heating in the presence of water following carbonation as the present invention. As a result, the steelmaking slag particles could be more strongly bonded to each other, and the strength of the solid material was improved.
【００１６】すなわち、炭酸化に引き続き、粉粒状の処
理物を含水状態に保持するか、又は高圧水蒸気下で加熱
することで、製鋼スラグ粒子間の隙間をトバモライト相
（５ＣａＯ・６ＳｉＯ2 ・５Ｈ2Ｏ）とすれば良い。こ
のトバモライト相は、大気中で安定に存在し、粒子間を
ほぼ埋め尽くすことができる。また、トバモライト相
は、固形物の強度を高め、炭酸化した固形物を路盤材、
建築土木用材として使用するのに大いに貢献する。That is, following the carbonation, the gap between the steelmaking slag particles (5CaO · 6SiO 2 · 5H 2 ) is formed by keeping the powdery or granular material in a water-containing state or by heating it under high-pressure steam. O). This tobermorite phase exists stably in the atmosphere and can almost completely fill the space between particles. In addition, the tobermorite phase increases the strength of the solid,
It greatly contributes to use as building materials.
【００１７】また、発明者は、固形物の強度向上に寄与
する物質についても研究し、製鋼スラグに、高炉水砕ス
ラグの微粉末あるいはフライアッシュの添加でトバモラ
イト相が、石膏あるいはセメントの添加でエトリンガイ
ト相（３ＣａＯ・Ａｌ2Ｏ3・３ＣａＳＯ4・３２Ｈ2Ｏ）
が、それぞれ安定相として存在することを見出した。エ
トリンガイト相も、トバモライト相と同様に固形物の強
度を高くし、固化にも有利に作用するので、これらの物
質と製鋼スラグとの混合することも本発明に加えた。The inventor has also studied a substance that contributes to the improvement of the strength of solids, and the tobermorite phase is added to steelmaking slag by adding fine powder of granulated blast furnace slag or fly ash to steelmaking slag, and to the gypsum or cement. Ettringite phase (3CaO.Al 2 O 3 .3CaSO 4 .32H 2 O)
Were found to exist as stable phases. Since the ettringite phase also increases the strength of solids and acts advantageously on solidification similarly to the tobermorite phase, mixing of these substances with steelmaking slag was also added to the present invention.
【００１８】さらに、本発明では、粉粒状製鋼スラグの
粒径を、５ｍｍ以下の粒子が５０重量％以上で、より好
ましくは、５ｍｍ以下の粒子が７５重量％以上とするの
が良い。製鋼スラグの粒径が５ｍｍ以下の粒子が５０重
量％未満だと、含水状態に保持するか、または高圧水蒸
気下で加熱しても反応が促進されず、トバモライト相、
又はエトリンガイト相が生成しないので、固形物の強度
が高まらないからである。Further, in the present invention, the particle size of the granular steelmaking slag is preferably 50% by weight or more for particles of 5 mm or less, more preferably 75% by weight or more of particles of 5 mm or less. If the particle size of the steelmaking slag is less than 50% by weight, the reaction is not promoted even if the slag is kept in a water-containing state or heated under high-pressure steam, and the tobermorite phase,
Alternatively, since the ettringite phase is not generated, the strength of the solid does not increase.
【００１９】なお、前記した含水状態に保持するとは、
前記の炭酸化処理した製鋼スラグ（あるいは製鋼スラグ
に高炉水砕スラグ微粉末、石膏、セメント及びフライア
ッシュのいずれか1種又は２種以上を混合した原料）
を、その内部まで固化に必要十分な水分を含有ないしは
浸透させた状態にて、適切な温度のもとで一定時間保持
することを意味する。この際、水分の供給は、上記原料
の混合時に水を添加する方法、原料を乾燥状態で混合し
たのち蒸気や噴霧水などによって吸水浸透させる方法な
どが採用できる。また、加熱をオートクレーブ内で行な
う際には、温度を１２０〜２６０℃程度にするのが好ま
しい。It should be noted that maintaining the above-mentioned water-containing state means that
Carbonated steelmaking slag (or a raw material obtained by mixing steelmaking slag with one or more of granulated blast furnace slag, gypsum, cement and fly ash)
Is maintained for a certain period of time at an appropriate temperature in a state in which sufficient moisture for solidification is contained or permeated therein. At this time, water can be supplied by a method of adding water at the time of mixing the raw materials, a method of mixing the raw materials in a dry state, and then absorbing and infiltrating the raw materials with steam or spray water. When heating is performed in an autoclave, the temperature is preferably set to about 120 to 260 ° C.
【００２０】[0020]
【実施例】表１に示す化学組成の製鋼スラグを用いて、
本発明に係る種々の固化方法を実施した。その際、効果
を確認するための比較例も実施した。なお、表２〜表６
のトバモライト相、エトリンガイト相の同定は、固形物
を粉末にしてＸ線回折で行ない、固形物の強度は、それ
自体の圧縮強度を測定した。EXAMPLE Using steelmaking slag having the chemical composition shown in Table 1,
Various solidification methods according to the present invention were implemented. At that time, a comparative example for confirming the effect was also performed. Table 2 to Table 6
The tobermorite phase and the ettringite phase were identified by X-ray diffraction using a solid as a powder, and the strength of the solid was measured by its own compressive strength.
【００２１】[0021]
【表１】 [Table 1]
【００２２】実施の条件及び結果を、表２〜６に一括し
て示す。 （実施例１）製鋼スラグのみを使用した場合の例であ
る。The operating conditions and results are shown collectively in Tables 2-6. (Example 1) An example in which only steelmaking slag is used.
【００２３】[0023]
【表２】 [Table 2]
【００２４】（実施例２）製鋼スラグに高炉水砕スラグ
微粉末を混合した場合の例である。(Example 2) This is an example in which fine powder of granulated blast furnace slag is mixed with steelmaking slag.
【００２５】[0025]
【表３】 [Table 3]
【００２６】（実施例３）製鋼スラグに石膏を混合した
場合の例である。(Example 3) This is an example in which gypsum is mixed with steelmaking slag.
【００２７】[0027]
【表４】 [Table 4]
【００２８】（実施例４）製鋼スラグにセメントを混合
した例である。Embodiment 4 This is an example in which cement is mixed with steelmaking slag.
【００２９】[0029]
【表５】 [Table 5]
【００３０】（実施例５）製鋼スラグにフライアッシュ
を混合した場合の例である。Example 5 This is an example in which fly ash is mixed with steelmaking slag.
【００３１】[0031]
【表６】 [Table 6]
【００３２】表２〜表６により、いずれの本発明に係る
固化方法によっても、固化状態に優れ、路盤材、建築土
木用材として使用可能な固形物が得られることが明らか
である。From Tables 2 to 6, it is clear that any of the solidification methods according to the present invention can provide a solid which has an excellent solidification state and can be used as a roadbed material or a building civil engineering material.
【００３３】[0033]
【発明の効果】以上述べたように、本発明により、従
来、産業廃棄物として処理されてきた製鋼スラグ、特に
粉粒状の製鋼スラグを、路盤材、建築土木用材に大量に
用いることが可能になった。この結果は、資源の再利
用、環境の向上などに寄与するものと期待される。As described above, according to the present invention, it is possible to use a large amount of steelmaking slag which has been conventionally treated as industrial waste, in particular, powdery and granular steelmaking slag, for roadbed materials and building civil engineering materials. became. This result is expected to contribute to resource reuse and environmental improvement.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松永 久宏 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社技術研究所内 (72)発明者 當房 博幸 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社技術研究所内 (72)発明者 高木 正人 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社技術研究所内 (72)発明者 熊谷 正人 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社技術研究所内 Ｆターム(参考） 4D004 AA43 BA02 CA22 CA45 CA50 CB50 CC01 CC13 DA03 DA06 DA07 DA20 4G012 JD02 JE01 RA03 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hisahiro Matsunaga 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside the Technical Research Institute of Kawasaki Steel Corporation (72) Inventor Hiroyuki Tobo 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Address Kawasaki Steel Engineering Co., Ltd. (72) Inventor Masato Takagi 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefecture Kawasaki Steel Engineering Co., Ltd. (72) Inventor Masato Kumagai 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Address Kawasaki Steel Corp. R & D center F term (reference) 4D004 AA43 BA02 CA22 CA45 CA50 CB50 CC01 CC13 DA03 DA06 DA07 DA20 4G012 JD02 JE01 RA03
Claims (4)
炭酸ガスを含有する気体又は炭酸水と接触反応させて炭
酸化する製鋼スラグの固化方法において、 前記炭酸化に引き続き、含水状態に保持するか又は高圧
水蒸気下で加熱することを特徴とする粉粒状製鋼スラグ
の固化方法。1. A method for solidifying steelmaking slag in which a granular steelmaking slag is carbonized by contacting and reacting with a gas containing carbon dioxide gas or carbonated water in a highly humid atmosphere, wherein the steelmaking slag is maintained in a water-containing state following the carbonation. Or heating under high-pressure steam.
グの微粉末、石膏、セメント及びフライアッシュのいず
れか１種類又は2種類以上を混合することを特徴とする
請求項１記載の粉粒状製鋼スラグの固化方法。2. The granulated steelmaking slag according to claim 1, wherein one or more of granulated blast furnace granulated slag, gypsum, cement and fly ash are mixed with the granulated steelmaking slag. Solidification method of steelmaking slag.
理スラグ、転炉スラグ、電気炉スラグ、溶融還元炉スラ
グ、二次精錬スラグ、ステンレススラグであることを特
徴とする請求項１又は２記載の粉粒状製鋼スラグの固化
方法。3. The powdery and granular steelmaking slag is a hot metal pretreatment slag, a converter slag, an electric furnace slag, a smelting reduction furnace slag, a secondary refining slag, and a stainless slag. The method for solidifying the granular steelmaking slag according to the above.
ｍ以下の粒子を５０重量％以上含有することを特徴とす
る請求項１〜３のいずれかに記載の粉粒状製鋼スラグの
固化方法。4. The powdery steel slag having a particle size of 5 m.
The method for solidifying powdery and granular steelmaking slag according to any one of claims 1 to 3, wherein the powder contains 50% by weight or more of particles of m or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16473699A JP2000350977A (en) | 1999-06-11 | 1999-06-11 | Method for solidifying granular steel-making slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16473699A JP2000350977A (en) | 1999-06-11 | 1999-06-11 | Method for solidifying granular steel-making slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000350977A true JP2000350977A (en) | 2000-12-19 |
Family
ID=15798936
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16473699A Withdrawn JP2000350977A (en) | 1999-06-11 | 1999-06-11 | Method for solidifying granular steel-making slag |
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| Country | Link |
|---|---|
| JP (1) | JP2000350977A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005239527A (en) * | 2004-02-27 | 2005-09-08 | Jfe Steel Kk | Method for producing carbonated solid |
| JP2006188368A (en) * | 2004-12-28 | 2006-07-20 | Jfe Steel Kk | Method of manufacturing carbonated solidified substance |
| JP2007031220A (en) * | 2005-07-28 | 2007-02-08 | Nippon Steel Corp | Method of granulating slag and granulated slag |
| JP2011001233A (en) * | 2009-06-19 | 2011-01-06 | Nippon Steel Corp | Non-expansive roadbed material |
| EP3119730A1 (en) * | 2014-03-21 | 2017-01-25 | The Royal Institution for the Advancement of Learning / McGill University | Carbonate-bonded construction products from steel-making residues and method for making the same |
| CN110167730A (en) * | 2016-12-09 | 2019-08-23 | 皇家学习促进学会/麦吉尔大学 | Beautification of landscape product and its manufacturing method |
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-
1999
- 1999-06-11 JP JP16473699A patent/JP2000350977A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005239527A (en) * | 2004-02-27 | 2005-09-08 | Jfe Steel Kk | Method for producing carbonated solid |
| JP2006188368A (en) * | 2004-12-28 | 2006-07-20 | Jfe Steel Kk | Method of manufacturing carbonated solidified substance |
| JP4645195B2 (en) * | 2004-12-28 | 2011-03-09 | Ｊｆｅスチール株式会社 | Method for producing carbonated solid |
| 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 |
| JP2011001233A (en) * | 2009-06-19 | 2011-01-06 | Nippon Steel Corp | Non-expansive roadbed material |
| EP3119730A1 (en) * | 2014-03-21 | 2017-01-25 | The Royal Institution for the Advancement of Learning / McGill University | Carbonate-bonded construction products from steel-making residues and method for making the same |
| EP3119730A4 (en) * | 2014-03-21 | 2017-04-05 | The Royal Institution for the Advancement of Learning / McGill University | Carbonate-bonded construction products from steel-making residues and method for making the same |
| CN106573845A (en) * | 2014-03-21 | 2017-04-19 | 皇家学习促进学会/麦吉尔大学 | Carbonate-bonded construction products from steel-making residues and method for making the same |
| US10112871B2 (en) | 2014-03-21 | 2018-10-30 | The Royal Institution For The Advancement Of Learning/Mcgill University | Carbonate-bonded construction products from steel-making residues and method for making the same |
| US10633288B2 (en) | 2014-03-21 | 2020-04-28 | Carbicrete Inc. | Carbonate-bonded construction products from steel-making residues and method for making the same |
| CN110167730A (en) * | 2016-12-09 | 2019-08-23 | 皇家学习促进学会/麦吉尔大学 | Beautification of landscape product and its manufacturing method |
| CN114538802A (en) * | 2022-02-09 | 2022-05-27 | 首钢集团有限公司 | Method and system for stabilizing and grading steel slag |
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