JP3261604B2 - Waste treatment method - Google Patents
Waste treatment methodInfo
- Publication number
- JP3261604B2 JP3261604B2 JP24519294A JP24519294A JP3261604B2 JP 3261604 B2 JP3261604 B2 JP 3261604B2 JP 24519294 A JP24519294 A JP 24519294A JP 24519294 A JP24519294 A JP 24519294A JP 3261604 B2 JP3261604 B2 JP 3261604B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- limestone
- waste
- municipal
- water treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は廃棄物処理方法に係り、
特に、都市ゴミや水処理汚泥を処理して揮発性金属化合
物を除去すると共に粒状物としてコンクリート骨材、路
盤材、埋め戻し材等としての有効利用を図る廃棄物処理
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste disposal method,
In particular, concrete aggregate as granules to remove the by processing municipal solid waste and water treatment sludge volatile metal compounds, roadbed materials, it relates FIG Ru waste processing method effectively utilized as backfill material, and the like.
【０００２】[0002]
【従来の技術及び先行技術】都市ゴミは焼却処理後、或
いは焼却処理されることなくそのまま埋め立て処分され
ている。近年、都市ゴミの発生量は増々増加する傾向に
あり、焼却コストの高騰、埋立地の不足が問題視されて
いる。2. Description of the Related Art Municipal garbage is landfilled after incineration or without incineration. In recent years, the amount of generated municipal waste has been increasing, and soaring incineration costs and shortage of landfills have been regarded as problems.
【０００３】一方、下水処理汚泥や上水処理汚泥等の水
処理汚泥は、各水処理場から大量に排出される。これら
水処理汚泥は、脱水後焼却され、或いは焼却処理される
ことなく埋め立て処分されており、その発生量が莫大な
量であることから、埋立地の不足が問題となっている。On the other hand, water treatment sludge such as sewage treatment sludge and water treatment sludge is discharged in large quantities from each water treatment plant. These water treatment sludges are incinerated after dehydration or landfilled without being incinerated, and the amount of the generated sludge is enormous. Therefore, shortage of landfills is a problem.
【０００４】そこで、最近になって、都市ゴミや水処理
汚泥の有効再利用を図るための研究開発がなされるよう
になり、特に下水汚泥焼却灰については、これを成形、
焼成して軽量骨材等を製造する方法が提案されている
（特公昭６１−１４０９９号、同６１−１４１００
号）。[0004] Therefore, recently, research and development for effective reuse of municipal garbage and water treatment sludge have been carried out. In particular, sewage sludge incineration ash is formed,
A method of producing a lightweight aggregate by firing has been proposed (Japanese Patent Publication Nos. 61-14099 and 61-14100).
issue).
【０００５】しかしながら、上記従来の方法では、下水
汚泥を脱水、焼成して焼却灰とする必要があり、下水汚
泥をそのまま用いることはできない。However, in the above-mentioned conventional method, it is necessary to dewater and burn sewage sludge to make incineration ash, and sewage sludge cannot be used as it is.
【０００６】一方、都市ゴミについては、一部肥料化な
どが提案されているが、大量の都市ゴミを有効再利用す
るための実用的な方法が提案されていないのが現状であ
る。都市ゴミや水処理汚泥を容易かつ効率的に処理して
コンクリート骨材、路盤材、埋め戻し材等として有効再
利用する技術として、本出願人は、先に、都市ゴミ及び
／又は水処理汚泥と石灰石とを混合粉砕した後、回転式
焼成炉にて焼成して粒状物とする方法を提案した（特願
平６−１１５１２５号、以下「先願」という。）。[0006] On the other hand, some of the municipal wastes have been proposed to be used as fertilizers, but at present, no practical method for effectively reusing a large amount of municipal waste has been proposed. As a technology for easily and efficiently treating municipal garbage and water treatment sludge and effectively reusing it as concrete aggregate, roadbed material, backfill material, and the like, the present applicant has previously proposed municipal garbage and / or water treatment sludge. And limestone were mixed and pulverized, and then fired in a rotary firing furnace to obtain granules (Japanese Patent Application No. 6-115125, hereinafter referred to as "prior application").
【０００７】上記先願の方法によれば、廃棄物から十分
な強度を有する粒状物を容易に製造することができ、こ
れを骨材や路盤材等として有効再利用することができ
る。According to the method of the prior application, a granular material having a sufficient strength can be easily produced from waste, and this can be effectively reused as an aggregate or a roadbed material.
【０００８】[0008]
【発明が解決しようとする課題】ところで、このように
して得られる粒状物については、その骨材や路盤材等と
しての用途の面から、より一層高強度であることが常に
要求されている。By the way, the granular material thus obtained is always required to have higher strength in view of its use as an aggregate, a roadbed material and the like.
【０００９】一方、一般に、焼結体の強度を向上させる
ためには、焼結助剤等の微量成分を添加して焼結性を高
める方法があるが、上記先願の方法は、都市ゴミや石灰
石を乾式にて混合粉砕するものであるため、この乾式処
理時にある種の成分を微量添加しても、混合状態が良く
ない。このため、添加効果が充分に発揮されないという
問題があった。また、乾式処理のため、処理時の発塵の
問題があり、作業環境が不良となるという不具合もあっ
た。On the other hand, in general, there is a method of improving the strength of a sintered body by adding a trace component such as a sintering aid to enhance the sinterability. And limestone are dry-mixed and pulverized. Therefore, even if a small amount of certain components are added during the dry treatment, the mixing state is not good. For this reason, there was a problem that the effect of addition was not sufficiently exhibited. In addition, there is a problem that dust is generated at the time of processing due to the dry processing, and that the working environment becomes poor.
【００１０】本発明は上記先願の問題点を解決し、製造
時の発塵を防止して、都市ゴミや水処理汚泥から、より
高強度で、骨材や路盤材等としての用途に好適な粒状物
を製造する技術を提供することを目的とする。The present invention solves the above-mentioned problems of the prior application, prevents dust generation during production, and has higher strength from municipal garbage and water treatment sludge, and is suitable for use as an aggregate or a roadbed material. It is an object of the present invention to provide a technique for producing a granular material.
【００１１】[0011]
【課題を解決するための手段】請求項１の廃棄物処理方
法は、都市ゴミ及び／又は都市ゴミ焼却灰に水を添加し
て得られる都市ゴミスラリーと、水処理汚泥との少なく
とも一方と、石灰石に水を添加して得られる石灰石スラ
リーと、焼結助剤とを湿式粉砕混合した後焼成して粒状
物とする廃棄物処理方法であって、該焼成に当たり、プ
レヒータ付ロータリキルンを用いて該都市ゴミスラリー
と水処理汚泥との少なくとも一方から揮発性金属化合物
を抽気した後、温度制御のもとに冷却して該揮発性金属
化合物を濃縮、回収することを特徴とする。Means for Solving the Problems] 請 Motomeko 1 waste treatment method, and urban waste slurry obtained by adding water to the city refuse and / or municipal refuse incineration ash, at least one of the water treatment sludge And a limestone slurry obtained by adding water to limestone and a sintering aid are wet-pulverized and mixed, and then fired to obtain a granular material.In the firing, a rotary kiln with a preheater is used. Using the city garbage slurry
Volatile metal compounds from at least one of water and sludge
And then cooled under temperature control to remove the volatile metal
It is characterized in that the compound is concentrated and recovered .
【００１２】請求項２の廃棄物処理方法は、請求項１の
方法において、焼結助剤がホウ酸、酸化リチウム、フッ
化カルシウム及びガラスカレット粉砕物よりなる群から
選ばれる１種又は２種以上であることを特徴とする。[0012] Waste processing method according to claim 2 is the method of claim 1, one or sintering aid boric acid is selected from lithium oxide, calcium fluoride and the group consisting of glass cullet pulverized product It is characterized by the above.
【００１３】請求項３の廃棄物処理方法は、請求項１又
は２の方法において、焼結助剤の添加量が、都市ゴミス
ラリー及び／又は水処理汚泥と、石灰石スラリーとの合
計に対して乾物割合で０．０５〜５．０重量％であるこ
とを特徴とする。According to a third aspect of the present invention, in the method of the first or second aspect , the amount of the sintering aid added is such that the municipal waste slurry and / or the water treatment sludge and the limestone slurry are mixed. Is a dry matter ratio of 0.05 to 5.0% by weight with respect to the total of
【００１４】以下に本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【００１５】都市ゴミ及び／又は水処理汚泥には、一般
に揮発性のＰｂ，Ｚｎ，Ｃｄ等の金属化合物が含有され
ている。そこで、本発明においては、後述の焼成に当
り、プレヒータ付ロータリーキルンを用い、これらの揮
発性金属化合物をプレヒータで抽気し、その後温度制御
のもとに冷却して各揮発性金属化合物を濃縮、回収す
る。Municipal waste and / or water treatment sludge generally contains volatile metal compounds such as Pb, Zn, and Cd. Therefore, in the present invention, in the calcination described later, a rotary kiln with a pre-heater is used, and these volatile metal compounds are bled by a pre-heater, and then cooled under temperature control to concentrate and recover each volatile metal compound. I do.
【００１６】請求項１〜３の廃棄物処理方法において
は、まず、石灰石に水を添加して石灰石スラリーとす
る。また、都市ゴミ及び／又は都市ゴミ焼却灰を用いる
場合には、これに水を添加して都市ゴミスラリーとす
る。In the waste disposal method according to any one of claims 1 to 3 , first, water is added to limestone to form a limestone slurry. In the case where municipal garbage and / or municipal garbage incineration ash is used, water is added to the municipal garbage slurry.
【００１７】石灰石スラリーは、６０〜７０重量％程度
の濃度であることが好ましく、これよりも石灰石が多い
と十分な均一混合効果が得られず、逆に水が多いと焼成
コストが高くつき不経済である。The limestone slurry preferably has a concentration of about 60 to 70% by weight. If the amount of limestone is larger than this, a sufficient uniform mixing effect cannot be obtained. Economy.
【００１８】都市ゴミスラリーについても同様な理由か
ら、都市ゴミ及び／又は都市ゴミ焼却灰濃度が６０〜７
０重量％のものが好ましい。For the same reason, the municipal garbage slurry has an municipal garbage and / or municipal garbage incineration ash concentration of 60 to 7%.
0% by weight is preferred.
【００１９】なお、本発明において、都市ゴミとは、台
所ゴミ、紙ゴミ、木片、布、その他の可燃ゴミである
が、プラスチック、発泡スチロール、金属等の不燃ゴミ
が若干含まれていても支障はない。都市ゴミ焼却灰は、
このような都市ゴミを７００〜９００℃で０．５〜１．
０時間程度焼成して得られるものである。In the present invention, municipal garbage is kitchen garbage, paper garbage, wood chips, cloth and other combustible garbage. Absent. Urban refuse incineration ash
Such municipal waste is treated at 700-900 ° C for 0.5-1.
It is obtained by firing for about 0 hours.
【００２０】一方、水処理汚泥とは、下水処理場、上水
処理場等の水処理場から排出される下水処理汚泥、上水
処理汚泥等の水処理汚泥である。On the other hand, the water treatment sludge is a water treatment sludge discharged from a water treatment plant such as a sewage treatment plant or a water treatment plant, such as a sewage treatment sludge or a water treatment sludge.
【００２１】本発明においては、このような都市ゴミス
ラリー及び／又は水処理汚泥と、石灰石スラリーと、焼
結助剤とを湿式ミル等で湿式粉砕混合する。In the present invention, such municipal waste slurry and / or water treatment sludge, limestone slurry, and a sintering aid are wet-pulverized and mixed by a wet mill or the like.
【００２２】ここで、都市ゴミスラリー及び／又は水処
理汚泥と、石灰石スラリーとの混合割合は、各々の乾燥
重量比で都市ゴミ（及び／又は都市ゴミ焼却灰）及び／
又は水処理汚泥に対して石灰石が等量以上、好ましくは
１〜２０倍となるようにするのが望ましい。石灰石の割
合が都市ゴミ（及び／又は都市ゴミ焼却灰）及び／又は
水処理汚泥の乾燥重量の等量未満であると後工程の焼成
により生成するクリンカー鉱物の生成量が少なくなり、
得られる粒状物が脆くなって、コンクリート骨材、路盤
材、埋め戻し材等の用途に適さなくなる。石灰石の混合
割合が多過ぎても添加による効果に大差はなく、都市ゴ
ミや水処理汚泥の処理量当りの石灰石使用量が増え、処
理コストが高くつき好ましくない。Here, the mixing ratio of the municipal waste slurry and / or the water treatment sludge and the limestone slurry is such that municipal waste (and / or municipal waste incineration ash) and / or
Alternatively, the amount of limestone is desirably equal to or more than that of water-treated sludge, preferably 1 to 20 times. If the proportion of limestone is less than the equivalent of the dry weight of municipal garbage (and / or municipal garbage incineration ash) and / or water treatment sludge, the amount of clinker minerals generated by post-firing will decrease,
The resulting granules become brittle and unsuitable for applications such as concrete aggregates, roadbed materials, backfill materials and the like. Even if the mixing ratio of limestone is too large, there is no significant difference in the effect of the addition, and the amount of limestone used per amount of treated municipal garbage or water-treated sludge increases, which is undesirably high in processing cost.
【００２３】一方、焼結助剤としては、融点降下作用の
あるホウ酸、ＣａＦ２（フッ化カルシウム）、酸化リチ
ウム、ガラスカレット粉砕物の１種又は２種以上を用い
ることができ、その添加量は都市ゴミスラリー及び／又
は水処理汚泥と石灰石スラリーとの合計に対して乾物割
合で０．０５〜５．０重量％とするのが好ましい。この
割合が０．０５重量％未満では十分な焼結作用が得られ
ず、得られる粒状物の強度が不足し、５．０重量％を超
えても効果に大差はなく、徒に焼結助剤コストが高騰し
て好ましくない。On the other hand, as the sintering aid, one or more of boric acid, CaF 2 (calcium fluoride), lithium oxide, and ground glass cullet having a melting point lowering action can be used. The amount is preferably 0.05 to 5.0% by weight on a dry matter basis with respect to the total of the municipal waste slurry and / or the water treatment sludge and the limestone slurry. If this ratio is less than 0.05% by weight, a sufficient sintering effect cannot be obtained, and the strength of the obtained granular material is insufficient. If it exceeds 5.0% by weight, there is no significant difference in the effect. The agent cost is undesirably high.
【００２４】なお、本発明において、上記湿式混合粉砕
の程度に特に制限はないが、通常の場合、都市ゴミスラ
リー及び／又は水処理汚泥と、石灰石スラリーと、焼結
助剤とを湿式ミルに投入して５〜３０分程度処理し、ス
ラリー中の分散粒子の粒径が２０〜１００μｍ程度とな
るようにするのが好ましい。In the present invention, the degree of the wet mixing and pulverization is not particularly limited. However, in a normal case, the municipal garbage slurry and / or the water treatment sludge, the limestone slurry and the sintering aid are mixed in a wet mill. It is preferable that the slurry is charged and treated for about 5 to 30 minutes so that the particle size of the dispersed particles in the slurry is about 20 to 100 μm.
【００２５】このような湿式粉砕混合により得られた粉
砕混合物は、次いで、回転型造粒焼成炉等の回転式焼成
炉（ロータリーキルン）に投入して１４００〜１５００
℃で焼成する。The pulverized mixture obtained by such wet pulverization and mixing is then put into a rotary kiln (rotary kiln) such as a rotary granulation and baking furnace, and is put in the range of 1400 to 1500
Bake at ℃.
【００２６】この焼成温度が１４００℃未満では十分に
焼き締った粒状物を得ることができず、コンクリート骨
材、路盤材、埋め戻し材等としての用途に適さなくな
る。また、焼成温度が１５００℃を超えても焼き締り状
態に大差はなく、焼成コストが高くつくことから、焼成
温度は１４００〜１５００℃とする。If the sintering temperature is lower than 1400 ° C., it is not possible to obtain sufficiently hardened granular material, and it is not suitable for use as a concrete aggregate, a roadbed material, a backfill material and the like. Even if the firing temperature exceeds 1500 ° C., there is no significant difference in the baking state, and the firing cost is high. Therefore, the firing temperature is set to 1400 to 1500 ° C.
【００２７】なお、特に十分に焼き締った粒状物を得る
ためには、焼成温度は１４５０℃以上とするのが好まし
い。[0027] In order to obtain particularly sufficiently compacted granules, the firing temperature is preferably 1450 ° C or higher.
【００２８】得られた粒状物は、通常の場合、粒径０．
５〜４０ｍｍの範囲で、平均粒径は２５ｍｍのものであ
り、これをそのままコンクリート骨材、路盤材、埋め戻
し材等として用いることができる。The granules obtained usually have a particle size of 0.
In the range of 5 to 40 mm, the average particle size is 25 mm, which can be used as it is as a concrete aggregate, a roadbed material, a backfill material, or the like.
【００２９】本発明により得られる粒状物は、粘土系物
質である都市ゴミ（或いは都市ゴミ焼却灰）及び／又は
水処理汚泥と石灰石との焼成物であるため、組成的には
セメント類似物質であり、従って湿潤すると固化する性
状を有し、コンクリート骨材、路盤材、埋め戻し材等と
して極めて有効に使用することができる。即ち、例え
ば、この粒状物を路面等に敷設し、その後水を散布する
と粒状物同志が接合して固化し、歩行又は走行に十分な
強度を有する路面又は下地面を形成することができる。The granular material obtained by the present invention is a fired product of municipal garbage (or municipal garbage incinerated ash) and / or water-treated sludge and limestone, which is a clay-based material. Yes, it has the property of solidifying when wet, and can be used very effectively as concrete aggregate, roadbed material, backfill material, and the like. That is, for example, when the granular material is laid on a road surface or the like, and then water is sprayed, the granular materials are joined and solidified, and a road surface or ground surface having sufficient strength for walking or running can be formed.
【００３０】本発明においては、この焼成に当り、プレ
ヒータ付ロータリーキルンを用い、都市ゴミ及び／又は
水処理汚泥中の揮発性金属化合物をプレヒータで抽気
し、その後温度制御のもとに冷却して各揮発性金属化合
物を濃縮、回収する。In the present invention, in this calcination, volatile metal compounds in municipal waste and / or water-treated sludge are extracted by a preheater using a rotary kiln with a preheater, and then cooled under a temperature control to be cooled. Concentrate and recover volatile metal compounds.
【００３１】[0031]
【作用】都市ゴミ及び水処理汚泥は粘土系物質であるた
め、これに石灰石を混合して焼成することにより、セメ
ントと同様にクリンカー鉱物が生成してクリンカー状の
粒状物が得られる。Since municipal garbage and water treatment sludge are clay-based materials, limestone is mixed with the limestone and calcined, whereby clinker minerals are generated in the same manner as cement to obtain clinker-like granular materials.
【００３２】得られた粒状物は十分な強度を有し、ま
た、有害物質の溶出の問題もなく、コンクリート骨材、
路盤材、埋め戻し材等として有効に利用できる。特に、
この粒状物は、湿潤すると固化する性状を有し、路面施
工等に極めて有用である。The obtained granular material has sufficient strength, and has no problem of elution of harmful substances.
It can be effectively used as a roadbed material, backfill material, etc. In particular,
This granular material has a property of solidifying when wet, and is extremely useful for road surface construction and the like.
【００３３】本発明においては、このような粒状物の製
造に当り、都市ゴミ及び／又は都市ゴミ焼却灰と、石灰
石と水処理汚泥と、焼結助剤とを湿式混合するため、発
塵の問題が解消すると共に、焼結助剤を均一に混合する
ことができる。なお、水処理汚泥については、本来、ス
ラリー状であるため、そのまま用いることができる。こ
のため、焼結助剤の効果が充分に発揮され、より一層高
強度で、各種用途において、優れた性能を示す粒状物を
得ることができる。In the present invention, in producing such granular materials, municipal garbage and / or municipal garbage incineration ash, limestone, water treatment sludge, and a sintering aid are wet-mixed. The problem can be solved and the sintering aid can be uniformly mixed. In addition, since the water treatment sludge is originally in a slurry state, it can be used as it is. For this reason, the effect of the sintering aid is sufficiently exhibited, and a granular material having higher strength and excellent performance in various applications can be obtained.
【００３４】本発明において、焼結助剤としてはホウ
酸、酸化リチウム、フッ化カルシウム及びガラスカレッ
ト粉砕物よりなる群から選ばれる１種又は２種以上が好
ましく、また、その添加量は、都市ゴミスラリー及び／
又は水処理汚泥と石灰石スラリーとの合計に対して乾物
割合で０．０５〜５．０重量％であることが好ましい。In the present invention, the sintering aid is preferably one or more selected from the group consisting of boric acid, lithium oxide, calcium fluoride, and ground glass cullet. Garbage slurry and / or
Alternatively, the dry matter ratio is preferably 0.05 to 5.0% by weight based on the total of the water treatment sludge and the limestone slurry.
【００３５】[0035]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００３６】なお、実施例において用いた都市ゴミは、
一般の可燃都市ゴミであり、都市ゴミ焼却灰は、このよ
うな都市ゴミを８００℃程度で３０分間焼成して得られ
たものである。水処理汚泥は通常の下水処理汚泥であ
る。The municipal waste used in the examples is
Urban refuse incineration ash, which is general combustible municipal waste, is obtained by firing such municipal waste at about 800 ° C. for 30 minutes. Water treatment sludge is ordinary sewage treatment sludge.
【００３７】また、都市ゴミスラリー及び／又は水処理
汚泥と石灰石スラリーの配合割合は、各々、都市ゴミ、
都市ゴミ焼却灰、水処理汚泥、石灰石の乾燥重量割合で
示す。従って、都市ゴミ及び水処理汚泥については、こ
れを１００℃で３０分間乾燥した後の重量で示す。The mixing ratios of the municipal solid waste slurry and / or the water treatment sludge and the limestone slurry are as follows.
Shown as the dry weight percentage of municipal waste incineration ash, water treatment sludge, and limestone. Therefore, the municipal garbage and the water treatment sludge are indicated by the weight after drying at 100 ° C. for 30 minutes.
【００３８】実施例１〜７ 都市ゴミ及び／又は都市ゴミ焼却灰に水を添加して表１
に示す濃度の都市ゴミスラリーとした。別に石灰石（粒
径３０〜５０ｍｍ）に水を添加して表１に示す濃度の石
灰石スラリーとした。この石灰石スラリーと、都市ゴミ
スラリー及び／又は水処理汚泥と、焼結助剤としてホウ
酸を表１に示す配合で、湿式ミルに投入して３０分湿式
粉砕混合した。これにより、スラリー中の石灰石や都市
ゴミ等は、粒径４０〜７０μｍ程度に粉砕された。な
お、ホウ酸の添加量は石灰石スラリーと、都市ゴミスラ
リー及び／又は水処理汚泥との合計に対して乾物割合で
０．１重量％とした。Examples 1 to 7 Water was added to municipal waste and / or municipal waste incineration ash.
The municipal garbage slurry having the concentration shown in Table 1 was used. Separately, water was added to limestone (particle size: 30 to 50 mm) to obtain a limestone slurry having the concentration shown in Table 1. This limestone slurry, municipal solid waste slurry and / or water treatment sludge, and boric acid as a sintering aid in the composition shown in Table 1 were charged into a wet mill and wet-pulverized and mixed for 30 minutes. As a result, limestone, municipal dust and the like in the slurry were pulverized to a particle size of about 40 to 70 μm. The amount of boric acid added was 0.1% by weight on a dry matter basis with respect to the total amount of the limestone slurry, the municipal waste slurry and / or the water-treated sludge.
【００３９】得られた混合物をロータリーキルンに投入
して表１に示す温度で表１に示す時間焼成して、表１に
示す平均粒径の粒状物を得た。The obtained mixture was put into a rotary kiln and calcined at the temperature shown in Table 1 for the time shown in Table 1 to obtain granules having an average particle size shown in Table 1.
【００４０】得られた各粒状物について、舗装要綱で規
定された方法により一軸圧縮強度及び修正ＣＢＲを測定
し、結果を表１に示した。With respect to each of the obtained granular materials, the uniaxial compressive strength and the modified CBR were measured by the method specified in the pavement outline, and the results are shown in Table 1.
【００４１】比較例１ 焼結助剤を添加しなかったこと以外は実施例６と同様に
して粒状物を得、同様に舗装要綱で規定された方法によ
り一軸圧縮強度及び修正ＣＢＲを測定し、結果を表１に
示した。Comparative Example 1 Granules were obtained in the same manner as in Example 6 except that no sintering aid was added, and the uniaxial compressive strength and the modified CBR were measured in the same manner as specified in the pavement outline. The results are shown in Table 1.
【００４２】比較例２ 都市ゴミを１００℃で３０分間各々乾燥し、これに石灰
石と焼結助剤とを添加して実施例６における都市ゴミ、
石灰石及び焼結助剤配合と同配合となるようにして乾式
粉砕混合し、混合物を表１に示す条件で焼成した。得ら
れた粒状物について、舗装要綱で規定された方法により
一軸圧縮強度及び修正ＣＢＲを測定し、結果を表１に示
した。Comparative Example 2 Urban waste was dried at 100 ° C. for 30 minutes, and limestone and a sintering aid were added thereto.
The mixture was dry-pulverized and mixed so as to have the same composition as the limestone and the sintering aid, and the mixture was fired under the conditions shown in Table 1. About the obtained granular material, the uniaxial compressive strength and the modified CBR were measured by the method prescribed in the pavement outline, and the results are shown in Table 1.
【００４３】また、得られた粒状物のうち粒径５ｍｍ以
下を細骨材、粒径５ｍｍ以上を粗骨材とした下記配合の
コンクリート供試体について、下記方法により圧潰強度
を測定すると共に溶出試験を行い、結果を表１に示し
た。 コンクリート配合（重量部） セメント：３００ｋｇ 細骨材（粒径５ｍｍ以下の粒状物）： ７００ｋｇ 粗骨材（粒径５ｍｍ以上の粒状物）：１０５０ｋｇ 水：１６５ｋｇ 圧潰強度測定方法 ＪＩＳ Ａ １１０８に規定された方法により実施し
た。 溶出試験方法 昭和４８年環境庁告示第１３号，産業廃棄物に含まれる
金属等の検定方法により検液を作成し、ＪＩＳ Ｋ ０
１０２工場排水の試験方法により微量成分の溶出量を定
量した。Further, among the obtained granular materials, the crushing strength was measured by the following method and the dissolution test was carried out on a concrete specimen having the following composition in which fine particles having a particle size of 5 mm or less were fine aggregates and coarse aggregates having a particle size of 5 mm or more were coarse aggregates. And the results are shown in Table 1. Concrete mix (parts by weight) Cement: 300 kg Fine aggregate (granules having a particle size of 5 mm or less): 700 kg Coarse aggregate (granules having a particle size of 5 mm or more): 1050 kg Water: 165 kg Crushing strength measurement method Specified in JIS A 1108 The method was performed according to the following method. Dissolution test method A test solution was prepared by the test method for metals contained in industrial waste, No. 13, Notification of the Environment Agency in 1973, and JIS K 0
The amount of trace components eluted was determined by the test method of 102 factory wastewater.
【００４４】[0044]
【表１】 [Table 1]
【００４５】表１より、本発明によれば、焼結助剤の添
加効果により、高強度粒状物が得られ、この粒状物は、
微量成分の溶出の問題もなく、コンクリート骨材、路面
材等として有効に使用でき、高強度コンクリート或いは
高耐久性の路面を形成できることが明らかである。From Table 1, it can be seen that, according to the present invention, a high-strength granular material can be obtained by the effect of adding a sintering aid.
It is clear that there is no problem of elution of trace components, and it can be effectively used as a concrete aggregate, a road surface material and the like, and a high-strength concrete or a highly durable road surface can be formed.
【００４６】これに対して、焼結助剤を用いない比較例
１では、高強度粒状物を得ることはできない。また、焼
結助剤を用いた場合であっても、乾式粉砕混合を行う比
較例２では、焼結助剤が十分な均一分散状態で混合され
ないため、十分な添加効果が得られず、粒状物の強度は
劣るものとなる。On the other hand, in Comparative Example 1 in which no sintering aid was used, a high-strength granular material could not be obtained. Further, even in the case where the sintering aid was used, in Comparative Example 2 in which dry pulverization and mixing were performed, the sintering aid was not mixed in a sufficiently uniform dispersion state, so that a sufficient effect of addition was not obtained, The strength of the object is inferior.
【００４７】実施例８〜１４ 焼結助剤として、表２に示すものを、石灰石スラリー
と、都市ゴミスラリー及び／又は水処理汚泥との合計に
対して、表２に示す割合で添加したこと以外は実施例６
と同様にして粒状物を製造し、得られた粒状物につい
て、舗装要綱で規定された方法により一軸圧縮強度及び
修正ＣＢＲを測定し、結果を表２に示した。Examples 8 to 14 As sintering aids, those shown in Table 2 were added in the proportions shown in Table 2 with respect to the total amount of limestone slurry, municipal waste slurry and / or water-treated sludge. Except for Example 6
A granular material was produced in the same manner as described above, and the obtained granular material was measured for uniaxial compressive strength and modified CBR by the method specified in the pavement outline, and the results are shown in Table 2.
【００４８】[0048]
【表２】 [Table 2]
【００４９】表２より、焼結助剤としては、ホウ酸以外
に酸化リチウム等も使用可能であり、その添加量は乾物
割合で０．０５〜５．０重量％が好適であることがわか
る。From Table 2, it can be seen that lithium oxide and the like can be used in addition to boric acid as the sintering aid, and the amount of addition is preferably 0.05 to 5.0% by weight in terms of dry matter. .
【００５０】実施例１５〜１８ 石灰石スラリーの配合量を表３に示す割合としたこと以
外は、実施例６と同様にして粒状物を製造し、得られた
粒状物について、舗装要綱で規定された方法により一軸
圧縮強度及び修正ＣＢＲを測定し、結果を表３に示し
た。Examples 15 to 18 Granules were produced in the same manner as in Example 6 except that the mixing amount of the limestone slurry was set to the ratio shown in Table 3, and the obtained granules were specified in the pavement outline. The unconfined compressive strength and the modified CBR were measured by the above method, and the results are shown in Table 3.
【００５１】[0051]
【表３】 [Table 3]
【００５２】表３より、都市ゴミ、都市ゴミ焼却灰又は
水処理汚泥に対する石灰石の割合は、各々乾燥重量比で
１：１〜２０の範囲が好適であることがわかる。Table 3 shows that the ratio of limestone to municipal waste, municipal waste incineration ash or water-treated sludge is preferably in the range of 1: 1 to 20 in terms of dry weight ratio.
【００５３】[0053]
【発明の効果】以上詳述した通り、本発明の廃棄物処理
方法によれば、都市ゴミや水処理汚泥から、揮発性金属
化合物を除去すると共に、コンクリート骨材、路盤材、
埋め戻し材等として有用な高強度粒状物を、発塵の問題
もなく、容易かつ効率的に、安価に得ることができる。As described in detail above, according to the waste treatment method of the present invention, volatile metal compounds are removed from municipal waste and water treatment sludge , and concrete aggregate, roadbed material,
A high-strength granular material useful as a backfill material or the like can be obtained easily, efficiently, and inexpensively without a problem of dust generation.
【００５４】本発明の廃棄物処理方法は廃棄物の減量化
及び有効再利用に有効であり、省資源のための技術とし
てその工業的、社会的有用性は極めて大である。The waste treatment method of the present invention is effective for reducing and effectively recycling waste, and its industrial and social usefulness as a technology for saving resources is extremely large.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−256485（ＪＰ，Ａ) 特開 平１−151985（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B09B 3/00 303 B09B 5/00 C02F 11/00 - 11/00 101 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-256485 (JP, A) JP-A-1-151985 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B09B 3/00 303 B09B 5/00 C02F 11/00-11/00 101
Claims (3)
を添加して得られる都市ゴミスラリーと、水処理汚泥と
の少なくとも一方と、石灰石に水を添加して得られる石
灰石スラリーと、焼結助剤とを湿式粉砕混合した後、焼
成して粒状物とする廃棄物処理方法であって、該焼成に
当たり、プレヒータ付ロータリキルンを用いて該都市ゴ
ミスラリーと水処理汚泥との少なくとも一方から揮発性
金属化合物を抽気した後、温度制御のもとに冷却して該
揮発性金属化合物を濃縮、回収することを特徴とする廃
棄物処理方法。And 1. A city refuse and / or municipal waste slurry to municipal waste incineration ash obtained by adding water, and at least one of the water treatment sludge, and limestone slurry obtained by adding water to limestone, after mixing the sintering aid wet grinding, a waste treatment method of the granular product was fired, hit the calcination, 該都City Gore using a rotary kiln with a preheater
After extracting the volatile metal compound from at least one of the mislurry and the water treatment sludge, the mixture is cooled under temperature control and cooled.
A waste treatment method comprising concentrating and recovering a volatile metal compound .
ウ酸、酸化リチウム、フッ化カルシウム及びガラスカレ
ット粉砕物よりなる群から選ばれる１種又は２種以上で
あることを特徴とする廃棄物処理方法。2. The method according to claim 1 , wherein the sintering aid is at least one member selected from the group consisting of boric acid, lithium oxide, calcium fluoride, and ground glass cullet. Waste treatment method.
剤の添加量が、都市ゴミスラリー及び／又は水処理汚泥
と、石灰石スラリーとの合計に対して乾物割合で０．０
５〜５．０重量％であることを特徴とする廃棄物処理方
法。3. A method according to claim 1 or 2, the addition amount of sintering aid, and municipal waste slurry and / or water treatment sludge, a dry matter percentage of the total of the limestone slurry 0.0
5 to 5.0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24519294A JP3261604B2 (en) | 1994-10-11 | 1994-10-11 | Waste treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24519294A JP3261604B2 (en) | 1994-10-11 | 1994-10-11 | Waste treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08108162A JPH08108162A (en) | 1996-04-30 |
| JP3261604B2 true JP3261604B2 (en) | 2002-03-04 |
Family
ID=17129993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24519294A Expired - Fee Related JP3261604B2 (en) | 1994-10-11 | 1994-10-11 | Waste treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3261604B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2760634C1 (en) * | 2020-11-03 | 2021-11-29 | Федеральное государственное бюджетное учреждение науки Институт физики металлов имени М.Н. Михеева Уральского отделения Российской академии наук (ИФМ УрО РАН) | Method for estimating the impact strength of products made of bainitically quenched construction steel |
| RU2795997C1 (en) * | 2022-11-25 | 2023-05-16 | Федеральное государственное бюджетное учреждение науки Институт физики металлов имени М.Н. Михеева Уральского отделения Российской академии наук (ИФМ УрО РАН) | Method for assessing the impact strength of products from structural steel hardened to bainite |
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|---|---|---|---|---|
| JP4901274B2 (en) * | 2006-04-07 | 2012-03-21 | 太平洋セメント株式会社 | Method for producing fired product |
| JP4985148B2 (en) * | 2006-06-28 | 2012-07-25 | 三菱マテリアル株式会社 | Method for processing asbestos-containing material using cement manufacturing process |
| JP6633885B2 (en) * | 2015-10-22 | 2020-01-22 | 太平洋セメント株式会社 | Manufacturing method of earthwork material |
| CN110746795B (en) * | 2019-11-04 | 2021-05-04 | 安徽工业大学 | Antirust-flame retardant-physique integrated solid waste resource utilization type pigment and filler and preparation thereof |
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1994
- 1994-10-11 JP JP24519294A patent/JP3261604B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2760634C1 (en) * | 2020-11-03 | 2021-11-29 | Федеральное государственное бюджетное учреждение науки Институт физики металлов имени М.Н. Михеева Уральского отделения Российской академии наук (ИФМ УрО РАН) | Method for estimating the impact strength of products made of bainitically quenched construction steel |
| RU2795997C1 (en) * | 2022-11-25 | 2023-05-16 | Федеральное государственное бюджетное учреждение науки Институт физики металлов имени М.Н. Михеева Уральского отделения Российской академии наук (ИФМ УрО РАН) | Method for assessing the impact strength of products from structural steel hardened to bainite |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08108162A (en) | 1996-04-30 |
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