JP2005013820A - Civil-engineering and building material due to sulfur bonding material and its manufacturing method - Google Patents

Civil-engineering and building material due to sulfur bonding material and its manufacturing method Download PDF

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JP2005013820A
JP2005013820A JP2003180082A JP2003180082A JP2005013820A JP 2005013820 A JP2005013820 A JP 2005013820A JP 2003180082 A JP2003180082 A JP 2003180082A JP 2003180082 A JP2003180082 A JP 2003180082A JP 2005013820 A JP2005013820 A JP 2005013820A
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sulfur
civil engineering
building material
civil
engineering
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Hitoshi Yoshii
仁 吉井
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JIIN KK
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JIIN KK
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    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a civil-engineering and building material due to sulfur bonding material, and its manufacturing method. <P>SOLUTION: The method for manufacturing the civil-engineering and building material due to the sulfur bonding material is characterized in that incineration ash, slag or the like containing harmful heavy metals and sulfur are ground and kneaded in a hermetically closed pressure container by rotary blades and, after sulfur is heated to a melting temperature while injecting steam in sulfur, the kneaded matter is cooled and solidified to obtain the civil-engineering and building material having harmful matter sealed therein. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、硫黄結合材による土木・建築用資材およびその製造方法に関するものである。
【0002】
【従来の技術】
従来、ごみ焼却灰や鉄鋼スラグ等の廃棄物、産業副産物を石油精製の脱硫過程で発生する硫黄の特性をそのまま利用し固化・安定化して再生利用する方法としてサルフィックスと称する技術が知られている。この技術は、硫黄が常温では水に不溶な遮水性の高い固体であり、119℃〜159℃で溶融状態の液体となる。この溶融状態の硫黄と廃棄物、産業副産物とを十分混練することにより、硫黄が固相の細孔内部まで浸透する。これを冷却固化することにより固相中の重金属およびダイオキシン類などの有害物質を水不溶の状態に固定化する方法である。
【0003】
このように、有害重金属を硫化物として封鎖できること、および硫黄を溶融固化させることにより結合材となし得ることなどの公知の技術を基礎として、有害金属等を含む焼却灰、スラグ等の溶融硫黄を混練し、冷却固化する方法として優れている技術である(例えば、特許文献1乃至4を参照。)。
【0004】
【特許文献1】
特開2002−60491号公報
【0005】
【特許文献2】
特願2002−69188号公報
【0006】
【特許文献3】
特開2002−97060号公報
【0007】
【特許文献4】
特開2001−163649号公報
【0008】
【発明が解決しようとする課題】
しかしながら、上述した技術は、焼却灰等に含まれる水分を除去するために乾燥、事前加熱等の工程とそのための設備を必要とすること。また、乾燥や混練の過程で発生する悪臭を除去するために大掛かりな排気脱臭設備が必要となること。また、混練等の作業で発生する騒音対策が必要となること。さらに、硫黄の引火性から溶融加熱温度を硫黄の引火点である207℃以下に管理する必要がある等の種々の問題がある。
【0009】
【課題を解決するための手段】
上述したような問題を解消するために、発明者らは鋭意開発を進めた結果、本発明では、加熱と粉砕、混練を同時に行なうことが出来る加圧密閉容器を用いることによって、上述の課題を解決すると共に、有害金属等の封鎖を効果的かつ効率的に行い、プラントの立地を円滑化し、さらに、冷却形成物の強度を向上させることによって利用の可能性を拡大することを可能とせしめた硫黄結合材による土木・建築用資材およびその製造方法を提供するものである。
【0010】
その発明の要旨とするところは、
(1)有害重金属を含有する焼却灰、スラグ等と硫黄を密閉加圧容器内で回転翼により粉砕、混練すると共に、水蒸気注入下で硫黄を溶融温度に加熱した後該混練物を冷却固化させ、有害物を封鎖した土木・建築用資材を得ることを特徴とする硫黄結合材による土木・建築用資材の製造方法。
(2)前記(1)に記載の硫黄を全混合量の5〜95質量%添加したことを特徴とする硫黄結合材による土木・建築用資材の製造方法。
(3)前記(1)に記載の硫黄の溶融温度として、200℃以上とすることを特徴とする硫黄結合材による土木・建築用資材の製造方法。
(4)前記(1)に記載の密閉加圧容器内圧力を1.1気圧以上とすることを特徴とする硫黄結合材による土木・建築用資材の製造方法。
(5)前記(1)〜(4)に記載の方法により製造された硫黄結合材による土木・建築用資材にある。
【0011】
【発明の実施の形態】
以下、本発明について図面に従って詳細に説明する。
【0012】
図1は、本発明を実施するための装置の概略図である。この図に示すように、二重構造釜1の間にオイル供給パイプ10、オイル還流パイプ11によってオイルタンク8と連結させ、オイルヒーター7で加熱されたオイルがオイル潤滑ポンプ9によって二重構造釜1の内側を加熱されたオイルが循環することによって二重構造釜1内を加熱する。この二重構造釜1に材料投入口2から産業廃棄物等の焼却灰等と硫黄を投入して、蓋によって密封した後、加熱する。また、加熱と同時に回転翼駆動モータ4によって、駆動軸6を介して回転する回転翼5が材料の粉砕と混練を行なう。
【0013】
上述した材料の粉砕と混練を行なう際に、焼却灰に水分が含まれている場合には、水蒸気が発生するが、発生した蒸気は設定した圧力を超えた場合、蒸気排出パイプ3から排出することによって、一定の加圧状態を維持するように構成する。また、蒸気排出パイプ3から排出する蒸気は、その後冷却し液化した後処理することによって悪臭排気を最小限に抑えることができる。加熱溶融硫黄と焼却灰等の材料の混練が終了した段階で、回転翼駆動モーター4を止め、その後、排出口12を開けば、混練物は二重構造釜1の内圧によって加圧排出することが出来る。
【0014】
本発明に係る有害重金属を含有する焼却灰としては、例えば都市ごみの焼却灰は塩分が多く含有しているため、リサイクル材として利用する際には、有害物質であるPb等が溶出する他に塩分の溶出が問題となる。また、スラグとしての高炉スラグ、転炉スラグ等も同様にスラグ中に重金属を含有する。これら有害重金属やダイオキシン類をリサイク利用するためには無害化状態に封鎖する必要がある。そのための封鎖作用をもつ硫黄を用いるものである。硫黄は、水に不溶で遮水性が高く、119℃以上で溶融し、常温では固化する性質がある。この硫黄を利用して細孔の細部まで硫黄を浸透させ、有害物質を水不溶の状態に固定化し、かつ、有害物質を化学的に不溶化するものである。
【0015】
有害金属物質の化学的不溶化としては、例えば有害金属であるPbは、焼却灰中のPbの主成分はPbOとして存在し、このPbOは約120℃の温度で次のような反応をする。
【0016】
PbO+S→PbS
この化学反応によって、難水溶性のPbSとなり、化学的に不溶化する。
【0017】
一方、硫黄は、原油精製、石油精製から発生する回収硫黄を利用することが可能であり、しかも、有害物質である重金属類、ダイオキシン類を硫黄被覆で外界遮断、化学的不溶化による封鎖性が高く、かつ、塩分の封鎖性が高く、耐塩性、耐酸性が高い性質がある。
【0018】
上述した特性を利用して焼却灰等からの有害物質を無害化するものであるが、一定以上の水分を含む焼却灰を大気圧下で溶融硫黄と混練する場合には、水の沸点が硫黄の融点を下回るため、水分の蒸発による局所的な温度低下により混練物の品質が不安定になる問題がある。このため、従来の方法では前述したように事前乾燥工程、或いは事前加熱工程を設ける必要があるが、本発明では1.1気圧以上の密閉加圧条件下で加熱と混練を同時に行うことによって、水の沸点が硫黄の融点を上回るようになり、水分の蒸発による局所的な温度低下を抑制することが出来る。しかし、1.1気圧未満では水分の気化熱による温度低下の影響で十分な効果が得られないことから、その圧力の下限を1.1気圧とした。
【0019】
また、本発明に係る硫黄の混合量は全混合量の5〜95質量%とする。しかし、5質量%未満では硫黄による有害金属を硫化物として封鎖し、有害物を固定化するには不十分である。また、95質量%を超えるとその効果は飽和することから、その範囲を5〜95質量%とする。望ましくは20〜80質量%とする。さらに望ましくは30〜60質量%とする。
【0020】
また、大気圧下の開放型設備で処理を行なう場合、硫黄臭等が発生し、その対策として大規模な吸気、脱臭、排気設備を必要とするが、しかし、本発明では密閉容器内で溶融、混練を同時に行なうことから、材料と外気とが遮断されており、また、圧力管理のために密閉容器から排出する加圧蒸気についても冷却液化することによって処理すればよく、悪臭対策を容易にすることが可能となる。また、本発明の方法によれば工程数を減じ、混練などの主工程を密閉容器内で行なうことから、密閉容器を振動抑止材料で製作することや防音材で被うことによって容易に騒音対策を行なうことが出来る。
【0021】
また、開放型の設備で硫黄を溶融する場合には、硫黄の発火点である207℃以上に加熱すると発火する恐れがあることから、通常は加熱温度を約200℃以下とし、それでも引火する可能性がある。しかしながら、本発明での密閉加圧容器内で水分を含んだ焼却灰等と溶融硫黄を混練することから、硫黄を飽和蒸気環境下に置く。これによって200℃以上で硫黄発火や引火火災の可能性を著しく減ずることが出来、安全に処理を行なうことが可能となり、重金属等の封鎖を短時間に効率的に実現することが出来る。また、本発明では、モーターにより駆動される回転翼によって材料の混練と粉砕を同時に行なうことから、焼却灰等と溶融硫黄との接触面が拡大し、有害物封鎖の確実性を高めるとともに、焼却灰の一部が微細化することによって、硫黄の節約と冷却形成物の強度増加を実現することができる。
【0022】
【実施例】
以下、本発明について実施例によって具体的に説明する。
【0023】
表1に示す都市ごみの焼却灰と製鋼スラグと製鋼ダストに硫黄を密閉加圧容器内で1.1気圧の圧力下で回転翼により、15〜20分間粉砕、混練すると共に、水蒸気注入下で硫黄を溶融温度200〜220℃に加熱して混溶融した後該混練物を造型、冷却固化させ製品を得る。この製品の重金属の溶出検査を行なった。溶出検査は、試料を2mm以下に粉砕し、10倍量の水中で6時間沸騰して濾過液を土壌環境基準の検定方法に従い分析した。その結果を表1に示す。
【0024】
【表1】

Figure 2005013820
【0025】
表1に示すように、No.1〜10は本発明例であり、No.11〜15は比較例である。また、No.16は原料の有害物質の含有量、No.17は有害物質の検出限界を示す。この表1によれは処理前の焼却灰等の原料中に含まれる有害物質である重金属に対し、本発明の処理によって得られた製品からの溶出する有害物質である重金属のCd、Pb、Cr、As、T−Hg、Seについて、いずれも検出限界である数値以上の検出は見られなかった。これに対し、No.11は硫黄の混合量が多いため、逆にCd金属が確認され、No.12〜No.14は硫黄の混合量が少ないことから、Cd、およびPb金属、ないしはT−Hgが認められた。また、No.15は硫黄を用いない場合でT−Hg、Cd、およびPb金属が認められた。さらには、これらいずれの比較例も水蒸気装入による密閉加熱容器を用いないことから、生産性が悪く、かつ悪臭の発生が見られた。
【0026】
また、処理された造型、冷却固化して得られた製品からの土木・建築用資材として使用した場合の特性としての耐食性試験である耐海水性については塩水噴霧試験(JIS C 0024)に準拠した条件(35℃、噴霧量1〜2ml/h)で試験を行なったところ、6カ月経過した結果は、表面には変化が見られなかった。これに対し、コンクリートの表面には塩害による荒れが進行した様子が観察された。これからも、コンクリートに比べ、本発明は海水による表面浸食が受けがたいことが分かる。また、耐酸性については、10%塩酸溶液中で圧縮強度を調べた。その結果、本発明は10%塩酸溶液浸漬試験においてやや強度低下が見られるものの、コンクリートは酸による侵食を受け、3カ月後には既に構造体の形状を保つていなかった。
【0027】
次に、圧縮強度(MN/m )試験については、JIS A 1108(φ100×200)試験方法で、曲げ強度試験はJIS A 1106(100×100×400)、引張強度(MN/m )試験はJIS A 1113(φ100×200)試験方法でそれぞれ行った結果、圧縮強度については、本発明では70.8、コンクリートは34.7、また、曲げ強度については、本発明では8.2、コンクリートは4.2、さらに、引張強度については、本発明では4.5、コンクリートは3.0となり、いずれの特性もコンクリートに比べ、高い値を示した。
【0028】
以上の結果、本発明例については、いずれも土木・建築用資材として使用した場合の耐食性である耐海水性、耐酸性に優れ、しかも、有筋パネルとした場合の圧縮強度、曲げ強度、引張強度、および温度特性についてはコンクリート以上の結果が得られ、また、内部鉄筋の錆の外観観察よっては、硫黄で被覆されているパネル内部には水分が浸透しないため、鉄筋の錆は認められなかった。これの結果からも土木・建築用資材として十分利用することが可能となった。
【0029】
【発明の効果】
以上述べたように、本発明による密閉加圧容器内での飽和蒸気環境下での処理により、水分の蒸発による局所的な温度低下を抑制し、従来での事前乾燥工程や事前加熱工程を省略可能となり、設備費の節約、処理工程の単純化および硫黄添加による悪臭の発生はなく、硫黄発火や引火火災の可能性が減じ、かつ、回転翼によって材料の混練と粉砕を同時に行なうことから、焼却灰等と溶融硫黄との接触面が拡大し、有害物封鎖の確実性を高めるとともに、焼却灰の一部が微細化することによって、硫黄の節約と冷却形成物の強度増加を実現することができる。さらには、金属添加による土木・建築用資材としての強度特性が得られ、かつ、耐食性等にも優れた製品が得られる等極めて優れた効果を奏するものである。
【図面の簡単な説明】
【図1】本発明を実施するための装置の概略図である。
【符号の説明】
1 二重構造釜
2 材料投入口
3 蒸気排出パイプ
4 回転翼駆動モータ
5 回転翼
6 駆動軸
7 オイルヒーター
8 オイルタンク
9 オイル潤滑ポンプ
10 オイル供給パイプ
11 オイル還流パイプ
12 排出口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a civil engineering / architectural material using a sulfur binder and a method for producing the same.
[0002]
[Prior art]
Conventionally, a technology called Sulfix is known as a method for solidifying, stabilizing, and recycling waste such as waste incineration ash, steel slag, and other industrial by-products using the characteristics of sulfur generated during the desulfurization process of petroleum refining. Yes. This technology is a highly water-blocking solid in which sulfur is insoluble in water at room temperature, and becomes a molten liquid at 119 ° C to 159 ° C. By sufficiently kneading this molten sulfur with waste and industrial by-products, sulfur penetrates into the pores of the solid phase. This is a method of immobilizing toxic substances such as heavy metals and dioxins in the solid phase in a water-insoluble state by cooling and solidifying them.
[0003]
In this way, based on known techniques such as the ability to sequester toxic heavy metals as sulfides, and the ability to form a binder by melting and solidifying sulfur, molten sulfur such as incinerated ash and slag containing toxic metals, etc. This is an excellent technique for kneading and cooling and solidifying (see, for example, Patent Documents 1 to 4).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-60491
[Patent Document 2]
Japanese Patent Application No. 2002-69188 [0006]
[Patent Document 3]
Japanese Patent Laid-Open No. 2002-97060
[Patent Document 4]
JP 2001-163649 A
[Problems to be solved by the invention]
However, the technology described above requires a process such as drying and preheating and equipment for the removal in order to remove moisture contained in the incineration ash and the like. In addition, a large exhaust deodorization facility is required to remove malodors generated during drying and kneading. In addition, measures against noise generated during operations such as kneading are required. Furthermore, there are various problems such as the need to manage the melting heating temperature to 207 ° C. or lower, which is the flash point of sulfur, from the flammability of sulfur.
[0009]
[Means for Solving the Problems]
In order to solve the problems as described above, the inventors have intensively developed and as a result, in the present invention, by using a pressure sealed container capable of simultaneously performing heating, pulverization, and kneading, the above-described problems can be solved. In addition to solving this problem, it was possible to effectively and efficiently block hazardous metals, smooth the plant location, and further increase the possibility of use by improving the strength of cooling formations. The present invention provides civil engineering and building materials using sulfur binders and methods for producing the same.
[0010]
The gist of the invention is that
(1) Incinerated ash containing toxic heavy metals, slag, etc. and sulfur are pulverized and kneaded by rotary blades in a sealed pressurized container, and the kneaded product is cooled and solidified after heating the sulfur to the melting temperature under steam injection. A method for producing civil engineering and construction materials using sulfur binders, characterized in that it obtains civil engineering and construction materials in which harmful substances are blocked.
(2) A method for producing a civil engineering / building material using a sulfur binder, wherein the sulfur described in (1) above is added in an amount of 5 to 95% by mass of the total mixed amount.
(3) A method for producing a civil engineering / building material using a sulfur binder, wherein the sulfur melting temperature according to (1) is 200 ° C. or higher.
(4) A method for producing a civil engineering / building material using a sulfur-binding material, wherein the pressure in the sealed pressurized container according to (1) is 1.1 atm or more.
(5) It exists in the materials for civil engineering and construction by the sulfur binding material manufactured by the method as described in said (1)-(4).
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a schematic view of an apparatus for carrying out the present invention. As shown in this figure, an oil supply pipe 10 and an oil recirculation pipe 11 are connected between an oil tank 8 and an oil tank 8 between the double structure hooks 1, and the oil heated by the oil heater 7 is discharged by an oil lubrication pump 9. The inside of the double structure kettle 1 is heated by circulating the heated oil inside. The double structure kettle 1 is charged with incineration ash and the like such as industrial waste and sulfur from the material charging port 2, sealed with a lid, and then heated. Simultaneously with the heating, the rotating blade drive motor 4 causes the rotating blade 5 rotating via the drive shaft 6 to pulverize and knead the material.
[0013]
When the above-described materials are pulverized and kneaded, if the incinerated ash contains moisture, water vapor is generated. If the generated vapor exceeds the set pressure, the vapor is discharged from the vapor discharge pipe 3. In this way, a constant pressure state is maintained. Further, the steam discharged from the steam discharge pipe 3 is then cooled and liquefied and then processed to minimize malodorous exhaust. When kneading of materials such as heated molten sulfur and incinerated ash is completed, the rotary blade drive motor 4 is stopped, and then the discharge port 12 is opened, so that the kneaded material is discharged under pressure by the internal pressure of the double structure kettle 1. I can do it.
[0014]
As incineration ash containing hazardous heavy metals according to the present invention, for example, municipal waste incineration ash contains a large amount of salt, so when using it as a recycling material, in addition to elution of harmful substances such as Pb Elution of salt becomes a problem. Similarly, blast furnace slag, converter slag, and the like as slag contain heavy metals in the slag. In order to recycle these toxic heavy metals and dioxins, it is necessary to block them in a detoxified state. For this purpose, sulfur having a blocking action is used. Sulfur is insoluble in water, has high water barrier properties, melts at 119 ° C. or higher, and solidifies at room temperature. This sulfur is used to infiltrate sulfur into the fine pores, fix the harmful substance in a water-insoluble state, and chemically insoluble the harmful substance.
[0015]
As chemical insolubilization of harmful metal substances, for example, Pb which is a harmful metal exists as PbO as a main component of Pb in the incineration ash, and this PbO reacts at the temperature of about 120 ° C. as follows.
[0016]
PbO + S → PbS
This chemical reaction results in poorly water-soluble PbS and is chemically insolubilized.
[0017]
On the other hand, it is possible to use sulfur recovered from crude oil and petroleum refining, and the heavy metals and dioxins, which are harmful substances, are blocked by the outside with sulfur coating, and are highly sequestered by chemical insolubilization. In addition, the salt-sealing property is high, and the salt resistance and acid resistance are high.
[0018]
The above-mentioned characteristics are used to detoxify harmful substances from incineration ash, etc., but when incineration ash containing a certain amount of moisture is mixed with molten sulfur at atmospheric pressure, the boiling point of water is sulfur. Therefore, there is a problem that the quality of the kneaded material becomes unstable due to a local temperature decrease due to evaporation of moisture. For this reason, in the conventional method, it is necessary to provide a pre-drying step or a pre-heating step as described above, but in the present invention, by simultaneously performing heating and kneading under a closed pressure condition of 1.1 atm or higher, The boiling point of water exceeds the melting point of sulfur, and a local temperature decrease due to evaporation of moisture can be suppressed. However, if the pressure is less than 1.1 atm, a sufficient effect cannot be obtained due to the temperature drop due to the heat of vaporization of moisture, so the lower limit of the pressure is set to 1.1 atm.
[0019]
Moreover, the mixing amount of sulfur according to the present invention is 5 to 95% by mass of the total mixing amount. However, if it is less than 5% by mass, it is insufficient to sequester harmful metals due to sulfur as sulfides and immobilize the harmful substances. Moreover, since the effect will be saturated when it exceeds 95 mass%, the range shall be 5-95 mass%. Desirably, it is 20-80 mass%. More desirably, the content is 30 to 60% by mass.
[0020]
In addition, when processing is performed in an open type facility under atmospheric pressure, sulfur odor is generated, and large-scale intake, deodorization, and exhaust facilities are required as countermeasures. However, in the present invention, it is melted in a sealed container. Since the material is mixed at the same time, the material and the outside air are shut off, and the pressurized steam discharged from the sealed container for pressure control can be processed by cooling and liquefying. It becomes possible to do. In addition, according to the method of the present invention, the number of processes is reduced, and main processes such as kneading are performed in a sealed container. Therefore, it is easy to take measures against noise by manufacturing the sealed container with a vibration suppression material or covering with a soundproofing material. Can be done.
[0021]
In addition, when sulfur is melted in an open type facility, it may ignite if heated to 207 ° C or higher, which is the ignition point of sulfur. There is sex. However, since the incinerated ash containing moisture and molten sulfur are kneaded in the sealed pressurized container in the present invention, sulfur is placed in a saturated steam environment. As a result, the possibility of sulfur ignition or ignition fire can be remarkably reduced at 200 ° C. or higher, the treatment can be performed safely, and the blocking of heavy metals and the like can be realized efficiently in a short time. In the present invention, since the material is simultaneously kneaded and pulverized by the rotor blade driven by the motor, the contact surface between the incinerated ash and the like and the molten sulfur is expanded, and the certainty of blocking harmful substances is increased, and incineration is performed. By miniaturizing part of the ash, it is possible to save sulfur and increase the strength of the cooling product.
[0022]
【Example】
Hereinafter, the present invention will be specifically described with reference to examples.
[0023]
Incineration ash, steelmaking slag and steelmaking dust shown in Table 1 are pulverized and kneaded for 15 to 20 minutes with a rotary blade under a pressure of 1.1 atm. Sulfur is heated to a melting temperature of 200 to 220 ° C. and mixed and melted, and then the kneaded product is formed and cooled and solidified to obtain a product. This product was inspected for elution of heavy metals. In the dissolution test, the sample was pulverized to 2 mm or less, boiled in 10 times the amount of water for 6 hours, and the filtrate was analyzed in accordance with the soil environment standard test method. The results are shown in Table 1.
[0024]
[Table 1]
Figure 2005013820
[0025]
As shown in Table 1, no. 1 to 10 are examples of the present invention. 11 to 15 are comparative examples. No. 16 is the content of harmful substances in the raw material. 17 shows the detection limit of a harmful substance. According to Table 1, heavy metals, which are harmful substances contained in raw materials such as incinerated ash before treatment, Cd, Pb, Cr of heavy metals, which are harmful substances eluted from the product obtained by the treatment of the present invention. As for As, T-Hg, and Se, no detection exceeding the detection limit was observed. In contrast, no. No. 11 has a large amount of sulfur mixed, so Cd metal was confirmed. 12-No. No. 14 was found to contain Cd and Pb metal or T-Hg due to the small amount of sulfur mixed. No. 15 was a case where no sulfur was used, and T-Hg, Cd, and Pb metals were observed. Furthermore, since any of these comparative examples did not use a hermetic heating vessel by steam charging, productivity was poor and generation of malodor was observed.
[0026]
In addition, the seawater resistance, which is a corrosion resistance test as a characteristic when used as a civil engineering / building material from a product obtained by cooling and solidification, is based on the salt spray test (JIS C 0024). When the test was conducted under the conditions (35 ° C., spray amount of 1 to 2 ml / h), the result of 6 months passed showed no change on the surface. In contrast, the surface of the concrete was observed to have been roughened by salt damage. From this, it can be seen that the present invention is less susceptible to surface erosion by seawater than concrete. For acid resistance, the compressive strength was examined in a 10% hydrochloric acid solution. As a result, although the present invention showed a slight decrease in strength in the 10% hydrochloric acid solution immersion test, the concrete was eroded by the acid, and the shape of the structure had not been maintained after three months.
[0027]
Next, the compressive strength (MN / m 2 ) test is the JIS A 1108 (φ100 × 200) test method, the bending strength test is JIS A 1106 (100 × 100 × 400), and the tensile strength (MN / m 2 ). As a result of the tests conducted by the JIS A 1113 (φ100 × 200) test method, the compressive strength is 70.8 in the present invention, 34.7 in concrete, and the bending strength is 8.2 in the present invention. The concrete was 4.2, and the tensile strength was 4.5 in the present invention, and the concrete was 3.0. Both properties were higher than the concrete.
[0028]
As a result of the above, for the examples of the present invention, all of them are excellent in seawater resistance and acid resistance, which are corrosion resistance when used as civil engineering and building materials, and in addition, compressive strength, bending strength, tensile strength when used as a reinforced panel As for the strength and temperature characteristics, the result is higher than that of concrete. Also, according to the observation of the appearance of the rust of the internal rebar, moisture does not penetrate into the panel covered with sulfur, so the rust of the rebar is not recognized. It was. From these results, it was possible to use it sufficiently as civil engineering and construction materials.
[0029]
【The invention's effect】
As described above, the treatment in a saturated steam environment in the sealed pressurized container according to the present invention suppresses local temperature decrease due to moisture evaporation, and omits the conventional pre-drying step and pre-heating step. Because there is no equipment cost saving, simplification of processing process and generation of bad odor due to sulfur addition, the possibility of sulfur ignition and flaming fire is reduced, and kneading and pulverization of materials are simultaneously performed by the rotor blade, To increase the contact surface between incinerated ash and molten sulfur and increase the certainty of sequestering harmful substances, and to reduce sulfur and to increase the strength of cooling formations by making some of the incinerated ash finer Can do. Furthermore, the strength characteristics as a civil engineering / building material by adding metal are obtained, and a product excellent in corrosion resistance and the like can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an apparatus for carrying out the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Double structure pot 2 Material inlet 3 Steam discharge pipe 4 Rotor blade drive motor 5 Rotor blade 6 Drive shaft 7 Oil heater 8 Oil tank 9 Oil lubrication pump 10 Oil supply pipe 11 Oil return pipe 12 Discharge port

Claims (5)

有害重金属を含有する焼却灰、スラグ等と硫黄を密閉加圧容器内で回転翼により粉砕、混練すると共に、水蒸気注入下で硫黄を溶融温度に加熱した後該混練物を冷却固化させ、有害物を封鎖した土木・建築用資材を得ることを特徴とする硫黄結合材による土木・建築用資材の製造方法。Incinerated ash containing toxic heavy metals, slag, etc. and sulfur are pulverized and kneaded with a rotary blade in a sealed pressurized container, and after the sulfur is heated to the melting temperature under steam injection, the kneaded product is cooled and solidified to produce a hazardous substance A method for producing civil engineering / architectural materials using sulfur binders, characterized by obtaining civil engineering / architectural materials that are sealed. 請求項1に記載の硫黄を全混合量の5〜95質量%添加したことを特徴とする硫黄結合材による土木・建築用資材の製造方法。A method for producing a civil engineering / building material using a sulfur binder, wherein the sulfur according to claim 1 is added in an amount of 5 to 95% by mass of the total mixing amount. 請求項1に記載の硫黄の溶融温度として、200℃以上とすることを特徴とする硫黄結合材による土木・建築用資材の製造方法。The method for producing a civil engineering / building material using a sulfur binder, wherein the sulfur melting temperature according to claim 1 is 200 ° C or higher. 請求項1に記載の密閉加圧容器内圧力を1.1気圧以上とすることを特徴とする硫黄結合材による土木・建築用資材の製造方法。The method for producing a civil engineering / building material using a sulfur binder, wherein the pressure in the sealed pressurized container according to claim 1 is 1.1 atm or more. 請求項1乃至4の何れかに記載の方法により製造された硫黄結合材による土木・建築用資材。A civil engineering / building material made of a sulfur binder produced by the method according to claim 1.
JP2003180082A 2003-06-24 2003-06-24 Civil-engineering and building material due to sulfur bonding material and its manufacturing method Withdrawn JP2005013820A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007029822A (en) * 2005-07-25 2007-02-08 Nippo Mecx Kk Mixing apparatus
JP2007203539A (en) * 2006-01-31 2007-08-16 Nippon Oil Corp Melting equipment for sulfur material
CN109262836A (en) * 2018-10-17 2019-01-25 徐州中国矿大岩土工程新技术发展有限公司 A kind of environment-friendly type grouting serous fluid agitating device and its application method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007029822A (en) * 2005-07-25 2007-02-08 Nippo Mecx Kk Mixing apparatus
JP2007203539A (en) * 2006-01-31 2007-08-16 Nippon Oil Corp Melting equipment for sulfur material
CN109262836A (en) * 2018-10-17 2019-01-25 徐州中国矿大岩土工程新技术发展有限公司 A kind of environment-friendly type grouting serous fluid agitating device and its application method

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