JP3045916B2 - Melting and solidification of waste incineration ash - Google Patents
Melting and solidification of waste incineration ashInfo
- Publication number
- JP3045916B2 JP3045916B2 JP6000416A JP41694A JP3045916B2 JP 3045916 B2 JP3045916 B2 JP 3045916B2 JP 6000416 A JP6000416 A JP 6000416A JP 41694 A JP41694 A JP 41694A JP 3045916 B2 JP3045916 B2 JP 3045916B2
- Authority
- JP
- Japan
- Prior art keywords
- incineration ash
- sio
- melting
- waste incineration
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃棄物処理場の焼却炉
から発生する廃棄物焼却灰の溶融固化方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for melting and solidifying waste incineration ash generated from an incinerator at a waste disposal site.
【０００２】[0002]
【従来の技術】例えば、ゴミ処理場の焼却炉から発生す
る飛灰等の廃棄物焼却灰は、Zn：数千〜数万ppm 、Pb：
数百〜数千ppm 、トータルCr：100 〜2000ppm 、Cd：50
〜数百ppm 等の有害重金属を高濃度に含有している。こ
の廃棄物焼却灰を従来法により溶融処理する場合には、
1400〜1600℃の温度で溶融するため、Zn：70％以上、P
b：90％以上、トータルCr：30％以上、Cd：90％以上と
いうように大部分が揮散してしまう。2. Description of the Related Art For example, waste incineration ash such as fly ash generated from an incinerator in a garbage disposal plant is composed of Zn: several thousand to tens of thousands ppm, Pb:
Hundreds to thousands ppm, Total Cr: 100 to 2000 ppm, Cd: 50
It contains high concentrations of harmful heavy metals such as ~ 100 ppm. When melting this waste incineration ash by the conventional method,
Melting at a temperature of 1400 to 1600 ° C, Zn: 70% or more, P
Most are volatilized, such as b: 90% or more, total Cr: 30% or more, and Cd: 90% or more.
【０００３】このように揮散した重金属類は、溶融炉の
後段で溶融飛灰として補集され、セメント固化、キレー
ト固化など別途二次処理により処分されている。しかし
セメント固化を行うと処理前と比較して処理物が増量
し、溶融処理の特長の一つである減容効果が生かされな
いこととなる。また溶融処理設備の他に、二次処理設備
が必要となるという問題がある。[0003] The heavy metals volatilized in this manner are collected as molten fly ash at a later stage of the melting furnace, and are separately disposed of by secondary treatment such as solidification of cement and solidification of chelate. However, when the cement is solidified, the amount of the treated material is increased as compared with that before the treatment, and the volume reduction effect, which is one of the features of the melting treatment, cannot be utilized. There is also a problem that a secondary treatment facility is required in addition to the melt treatment facility.
【０００４】このほか、廃棄物焼却灰を電気溶融炉で溶
融処理し、その液面に形成されるNaCl系の溶融塩層に重
金属を捕捉させる方法も知られている。しかしその結果
得られた溶融塩スラグは溶出試験をクリアすることがで
きないので、その後の処分が問題となる。さらにこの溶
融塩層による炉体の損耗が激しいという問題もある。[0004] In addition, a method is also known in which waste incineration ash is melted in an electric melting furnace, and heavy metals are captured in a NaCl-based molten salt layer formed on the liquid surface. However, since the resulting molten salt slag cannot pass the dissolution test, subsequent disposal becomes a problem. Another problem is that the furnace body is severely worn by the molten salt layer.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、重金属類を封じ込めたまま廃棄物焼
却灰を溶融固化し、安定なスラグとすることができる廃
棄物焼却灰の溶融固化方法を提供するためになされたも
のである。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and melts and solidifies waste incineration ash while keeping heavy metals contained therein so that a stable slag can be obtained. This was made to provide a melt-solidification method.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、廃棄物焼却灰にその20〜40％の
SiO2系吸着剤と水とを加えて脱塩処理したのち脱水し、
これにSiO2および融点降下剤を混合してSiO2/(廃棄物焼
却灰＋SiO2系吸着剤＋SiO2) ＝40〜60％、水分30％以下
に調整し、これを誘導加熱炉により溶融し固化すること
を特徴とするものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a waste incinerated ash that has a content of 20 to 40%.
After adding a SiO 2 adsorbent and water to desalinate and then dehydrating,
This is mixed with SiO 2 and a melting point depressant to adjust SiO 2 / (waste incineration ash + SiO 2 -based adsorbent + SiO 2 ) = 40 to 60% and moisture to 30% or less, and this is melted by an induction heating furnace. It is characterized by solidification.
【０００７】図１に示すように、本発明ではまず廃棄物
焼却灰にSiO2系吸着剤と水とを加えて脱塩処理を行う。
これは廃棄物焼却灰中にはNa、K 等のアルカリ金属の他
にClが１〜20％程度含まれているために、廃棄物焼却灰
をそのまま溶融するとKCl 、NaClなどのCl系の溶融塩が
溶融炉内で生成され、炉の耐火物の寿命を縮めること、
処分に困る溶融塩スラグが発生してしまうこと、Clによ
って重金属類が低沸点の塩化物となり、重金属類の揮散
が促進されることなどの問題があるためである。そこで
本発明では脱塩処理により塩素量を0.01〜５％程度と
し、Cl系の溶融塩の生成と重金属類の塩化物化を防止す
る。As shown in FIG. 1, in the present invention, desalination treatment is first performed by adding an SiO 2 -based adsorbent and water to waste incineration ash.
This is because waste incineration ash contains about 1 to 20% Cl in addition to alkali metals such as Na and K. Therefore, if waste incineration ash is melted as it is, Cl-based melting of KCl, NaCl, etc. Salt is formed in the melting furnace, shortening the life of the furnace refractory,
This is because there are problems such as the generation of molten salt slag which is troublesome for disposal and the fact that heavy metals are converted into chlorides having a low boiling point by Cl, thereby promoting the volatilization of heavy metals. Therefore, in the present invention, the amount of chlorine is reduced to about 0.01 to 5% by desalting treatment to prevent generation of Cl-based molten salts and chlorination of heavy metals.
【０００８】脱塩処理は、廃棄物焼却灰とSiO2系吸着剤
とを水中に投じて0.5 〜１時間攪拌混合し、Clを始めN
a、K 等の塩類の除去を行う。このとき廃棄物焼却灰中
に含有される重金属類が液側に移行しないように、SiO2
系吸着剤により重金属類を吸着させる。廃棄物焼却灰中
に含まれる主な重金属であるZn、Pb、トータルCr、Cdの
合計量は一般的に数百〜数％であり、これを完全に吸着
させるために廃棄物焼却灰の重量の20〜40％のSiO2系吸
着剤を用いる。ここでSiO2系吸着剤の量が20％未満であ
ると、廃棄物焼却灰中の重金属類の10％以上が液側に移
行してしまう。また40％を越えても吸着効果に差が見ら
れなくなる。なお、SiO2系吸着剤としては後の固液分離
が容易なように、粒状またはペレット状としたものを使
用することが好ましい。In the desalination treatment, the waste incineration ash and the SiO 2 -based adsorbent are thrown into water and mixed with stirring for 0.5 to 1 hour.
Remove salts such as a and K. At this time, in order to prevent heavy metals contained in the waste incineration ash from shifting to the liquid side, SiO 2
Heavy metals are adsorbed by the system adsorbent. The total amount of Zn, Pb, total Cr and Cd, which are the main heavy metals contained in the waste incineration ash, is generally several hundred to several percent, and the weight of the waste incineration ash to completely adsorb it 20 to 40% of the SiO 2 adsorbent is used. Here, if the amount of the SiO 2 -based adsorbent is less than 20%, 10% or more of the heavy metals in the waste incineration ash migrate to the liquid side. In addition, no difference is seen in the adsorption effect even if it exceeds 40%. It is preferable to use an SiO 2 -based adsorbent in the form of granules or pellets so that solid-liquid separation can be easily performed later.
【０００９】廃棄物焼却灰を水中で混合し易いように、
廃棄物焼却灰と水との固液比は1:3 〜1:7 程度に設定す
ることが好ましい。十分に攪拌した後、これを固液分離
機により脱水してClを大量に含む洗浄液と、廃棄物焼却
灰＋SiO2系吸着剤に分離する。脱水された廃棄物焼却灰
＋SiO2系吸着剤は後段において一緒に溶融処理される。
SiO2系吸着剤はガラスの網目形成剤であるSiO2を主成分
とするため、溶融処理すると重金属類はガラスの網目構
造中に取り込まれ、安定したガラス固化体となる。SiO2
系吸着剤の代表的なものとしてゼオライトを使用するこ
とができる。[0009] In order to easily mix waste incineration ash in water,
The solid-liquid ratio between the waste incineration ash and water is preferably set to about 1: 3 to 1: 7. After sufficient stirring, the mixture is dehydrated by a solid-liquid separator to separate into a cleaning liquid containing a large amount of Cl and a waste incinerated ash + SiO 2 -based adsorbent. The dehydrated waste incineration ash + SiO 2 -based adsorbent is melted together in the subsequent stage.
Since the SiO 2 -based adsorbent mainly contains SiO 2 , which is a network-forming agent for glass, heavy metals are taken into the network structure of the glass when it is melted, and a stable vitrified body is formed. SiO 2
Zeolite can be used as a typical example of the adsorbent.
【００１０】上記の脱塩処理工程から発生する脱水廃液
は、Clを大量に含むとともにNa、K 等をも含む非常にア
ルカリ性の強い液体である。そこで廃棄物焼却灰あるい
はSiO2リッチな溶融スラグを、この脱水廃液とともに例
えば100 ℃で７時間水熱合成することにより、ゼオライ
ト等のSiO2系吸着剤を生成することができる。このSiO2
系吸着剤は脱塩処理に使用され、またこれにより脱水廃
液の有効利用が可能となる。[0010] The dehydration waste liquid generated from the above desalination treatment step is a very alkaline liquid containing a large amount of Cl and also containing Na, K and the like. Therefore, a SiO 2 -based adsorbent such as zeolite can be produced by hydrothermally synthesizing waste incineration ash or SiO 2 -rich molten slag together with the dewatered waste liquid at, for example, 100 ° C. for 7 hours. This SiO 2
The system-based adsorbent is used for desalination treatment, and this makes it possible to effectively use the dewatered waste liquid.
【００１１】脱水された廃棄物焼却灰＋SiO2系吸着剤は
必要に応じて乾燥され、SiO2および融点降下剤を混合さ
れる。SiO2は重金属類をガラス構造中に取り込んだ安定
したガラス固化体を得るためのものである。その添加量
は、SiO2/(廃棄物焼却灰＋SiO2系吸着剤＋SiO2) ＝40〜
60重量％となるように決定する。SiO2が40％未満である
と溶融により得られるガラス固化体が化学的に脆くなっ
て安定したガラス固化体とならず、逆に60％を越えると
融点が高くなって流動性が低下し、溶融炉の操作性が低
下してしまう。The dehydrated waste incineration ash + SiO 2 -based adsorbent is dried, if necessary, and mixed with SiO 2 and a melting point depressant. SiO 2 is for obtaining a stable vitrified body in which heavy metals are incorporated in a glass structure. The amount added, SiO 2 / (waste incineration ash + SiO 2 based adsorbent + SiO 2) = 40~
Determine to be 60% by weight. If the SiO 2 content is less than 40%, the vitrified product obtained by melting becomes chemically brittle and does not become a stable vitrified product. Conversely, if it exceeds 60%, the melting point increases and the fluidity decreases, The operability of the melting furnace is reduced.
【００１２】また融点降下剤は溶融温度を低下させて溶
融を促進するとともに、重金属類の飛散を抑制するため
のものである。この融点降下剤としてはNa2CO3、NaNO3
等の溶融塩を使用することが好ましい。Na2CO3は融点降
下効果および侵食性がゆるやかであり、NaNO3 は融点降
下効果および侵食性が顕著である。このため、Na2CO3は
SiO2重量の20〜25％程度添加することが好ましく、NaNO
3 はSiO2重量の10〜15％程度とすることが好ましい。The melting point depressant lowers the melting temperature to promote the melting and suppresses scattering of heavy metals. Na 2 CO 3 , NaNO 3
It is preferable to use a molten salt such as Na 2 CO 3 has a moderate melting point lowering effect and erosion, and NaNO 3 has a significant melting point lowering effect and erosion. For this reason, Na 2 CO 3
Preferably, about 20 to 25% of the weight of SiO 2 is added.
3 is preferably about 10 to 15% of the weight of SiO 2 .
【００１３】このようにしてSiO2および融点降下剤を混
合された廃棄物焼却灰＋SiO2系吸着剤は、水分を30％以
下とした状態でSiC 系るつぼに収納され、図２に示すよ
うな誘導加熱炉で溶融される。ここで水分が30％を越え
ると、高温のるつぼとの接触が危険となる。SiC 系るつ
ぼ１は溶融塩に対する耐食性に非常に優れているため
に、損耗が少ない利点がある。また誘導加熱炉は炉体２
や電極３の損耗がなく、るつぼが損耗したときにはるつ
ぼの交換のみで済むため、炉の修復が非常に容易とな
る。さらに容易に還元雰囲気とすることができるため、
溶融物中の金属類の還元除去も可能である。The waste incineration ash + SiO 2 -based adsorbent mixed with SiO 2 and the melting point depressant in this way is stored in a SiC-based crucible with a water content of 30% or less, as shown in FIG. Melted in induction heating furnace. If the water content exceeds 30%, contact with a hot crucible becomes dangerous. Since the SiC-based crucible 1 is very excellent in corrosion resistance against molten salt, there is an advantage that wear is small. The induction heating furnace is a furnace body 2
When the crucible is worn out, there is no need to replace the crucible, and thus the furnace is very easily repaired. Since the atmosphere can be reduced more easily,
Reduction and removal of metals in the melt are also possible.
【００１４】図２に示すように、溶融するとるつぼ中の
下部には重金属類が多量に含まれているガラスの溶融層
４ができ、中段に廃棄物焼却灰に添加した溶融塩（融点
降下剤）の層５が比重の差により分離している。この溶
融塩の層５が最上部を覆う被溶融物の層６の溶融を促進
し、低温での溶融を可能としている。このようにして溶
融を行った後、溶融物は冷却固化されガラス固化体とし
て取り出される。As shown in FIG. 2, a molten layer 4 of glass containing a large amount of heavy metals is formed at the lower part of the crucible when it is melted. The molten salt (melting point depressant) added to the waste incineration ash is formed in the middle stage. 3) are separated by a difference in specific gravity. The molten salt layer 5 promotes melting of the layer 6 of the material to be melted which covers the uppermost portion, and enables melting at a low temperature. After melting in this way, the melt is cooled and solidified and taken out as a vitrified body.
【００１５】[0015]
【作用】本発明の廃棄物焼却灰の溶融固化方法によれ
ば、有害重金属の飛散を抑制しつつその大部分をガラス
固化体中に安定して捕捉させることができる。このガラ
ス固化体は溶出試験の結果、埋め立て等の処理基準を満
足していることが確認された。また重金属類の捕捉率
は、Zn：60〜95％、Pb：60〜99％、トータルCr：80〜99
％、Cd：60〜95％程度となる。このようにガラス固化体
中に多量に重金属類を捕捉させることができるので、溶
融時に生ずる溶融飛灰もリターンさせて再度溶融するこ
とにより、系内濃縮されることなく処理することができ
る。このため、従来のような溶融飛灰のセメント固化や
キレート固化などの二次処理が不要となる。以下に本発
明を図示の実施例により更に詳細に説明する。According to the method for melting and solidifying waste incineration ash of the present invention, most of the harmful heavy metals can be stably captured in the vitrified body while suppressing scattering of harmful heavy metals. As a result of a dissolution test, it was confirmed that the vitrified product satisfies processing standards such as landfill. The trapping rate of heavy metals is as follows: Zn: 60 to 95%, Pb: 60 to 99%, and total Cr: 80 to 99%.
%, Cd: about 60 to 95%. In this way, a large amount of heavy metals can be captured in the vitrified body, and thus the molten fly ash generated during melting can be returned and melted again, so that processing can be performed without concentration in the system. For this reason, the secondary treatment such as the solidification of cement and the solidification of chelate of molten fly ash, which is conventionally required, becomes unnecessary. Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.
【００１６】[0016]
【実施例】実施例はゴミ焼却設備の集塵装置により補集
された廃棄物焼却灰を溶融固化する例を示すものであ
る。この廃棄物焼却灰の組成分析を行った結果、SiO2：
22.2％、CaO ：23.0％、Al2O3 ：16.0％、Na2O：5.5
％、K2O ：5.8 ％、MgO ： 4.4％、Fe2O3 ：1.5 ％、C
l：8.2 ％、重金属類はZn：9600ppm 、Pb：1500ppm 、
トータルCr：200ppm、Cd：80ppm であった。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shows an example of melting and solidifying waste incineration ash collected by a dust collector of a garbage incineration facility. As a result of analyzing the composition of this waste incineration ash, SiO 2 :
22.2%, CaO: 23.0%, Al 2 O 3: 16.0%, Na 2 O: 5.5
%, K 2 O: 5.8% , MgO: 4.4%, Fe 2 O 3: 1.5%, C
l: 8.2%, heavy metals: Zn: 9600ppm, Pb: 1500ppm,
Total Cr: 200 ppm, Cd: 80 ppm.
【００１７】この廃棄物焼却灰に対して、廃棄物焼却灰
と脱水廃液とから合成されたゼオライトをSiO2系吸着剤
として灰重量の30％添加して水中に投入し、固液比1:5
にて１時間脱塩処理を行った。その後、フィルタープレ
スにより固液分離を行い、乾燥機により水分が10％とな
るまで乾燥した。脱水廃液側への移行割合は、Cl：88
％、Zn：0 ％、Pb：0.1 ％、トータルCr：1.4 ％、Cd：
0 ％であり、脱塩処理の目的である廃棄物焼却灰からの
Clの除去と、SiO2系吸着剤による脱水廃液側への重金属
の移行防止とが達成されている。脱塩処理後の廃棄物焼
却灰＋SiO2系吸着剤中のClは0.9 ％であった。To this waste incineration ash, a zeolite synthesized from the waste incineration ash and the dewatered waste liquid was added as an SiO 2 -based adsorbent at 30% of the weight of the ash, and the resulting mixture was poured into water. Five
For 1 hour. Thereafter, solid-liquid separation was performed by a filter press, and the solid was dried by a dryer until the water content became 10%. The transfer ratio to the dewatering waste liquid side is Cl: 88
%, Zn: 0%, Pb: 0.1%, Total Cr: 1.4%, Cd:
0% of the waste incineration ash
Removal of Cl and prevention of migration of heavy metals to the dewatering waste liquid side by the SiO 2 adsorbent have been achieved. Cl in the waste incineration ash after the desalination treatment + SiO 2 -based adsorbent was 0.9%.
【００１８】またこの場合、脱塩処理後の廃棄物焼却灰
＋SiO2系吸着剤中のSiO2含有率は36.0％であった。そこ
で廃棄物焼却灰＋SiO2系吸着剤の40％のSiO2を添加し、
SiO2/(廃棄物焼却灰＋SiO2系吸着剤＋SiO2) ＝55％とし
た。また、融点降下剤であるNa2CO3を上記SiO2量の20％
添加し、さらにNaNO3 をSiO2重量の15％添加した。これ
らを均一に混合したのち、誘導加熱炉のSiC 系るつぼ中
に投入し、溶融した。溶融時の温度はガラス溶融層が12
00℃、溶融塩層が1000℃、被溶融物による被覆層が500
℃であり、安定に溶融できることが確認された。Further, in this case, the content of SiO 2 in the waste incineration ash after the desalination treatment + SiO 2 adsorbent was 36.0%. Therefore waste 40% SiO 2 in the incineration ash + SiO 2 based adsorbent is added,
SiO 2 / (waste incineration ash + SiO 2 adsorbent + SiO 2 ) = 55%. In addition, Na 2 CO 3 , which is a melting point depressant, is 20% of the above SiO 2
NaNO 3 was added at 15% of the weight of SiO 2 . After they were uniformly mixed, they were put into a SiC crucible of an induction heating furnace and melted. The melting temperature is 12
00 ° C, the molten salt layer is 1000 ° C, the coating layer of the material to be melted is 500
° C, and it was confirmed that melting could be performed stably.
【００１９】溶融物を固化して得られたガラス固化体中
には、廃棄物焼却灰中の重金属のうちZn：75％、Pb：95
％、トータルCr：87％、Cd：90％が捕捉されており、通
常の溶融処理法では重金属の捕捉率がZn：10％以下、P
b：10％以下、トータルCr：60％以下、Cd：10％以下で
あるのと対比すると非常に優れた結果となった。また得
られたガラス固化体について、環境庁告示13号の溶出試
験を行ったところ、埋立基準を満足する結果が得られ
た。In the vitrified material obtained by solidifying the melt, Zn: 75% and Pb: 95 of the heavy metals in the waste incineration ash are contained.
%, Total Cr: 87% and Cd: 90% are captured. In the ordinary melting treatment method, the trapping rate of heavy metals is Zn: 10% or less.
Very excellent results were obtained in comparison with b: 10% or less, total Cr: 60% or less, and Cd: 10% or less. In addition, the obtained vitrified product was subjected to a dissolution test according to the notification of the Environment Agency Notification No. 13, and a result satisfying the landfill standard was obtained.
【００２０】次に、条件を変えて実施した本発明の実施
例と、条件を外れた比較例とを表１〜表２に示す。Next, Tables 1 and 2 show Examples of the present invention which were carried out under different conditions, and Comparative Examples where the conditions were not satisfied.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】[0023]
【発明の効果】以上に説明したように、本発明の廃棄物
焼却灰の溶融固化方法によれば、廃棄物焼却灰を溶融固
化し、重金属類を封じ込めた安定なガラス固化体を得る
ことができる。また従来のような溶融飛灰のセメント固
化やキレート固化などの二次処理が不要となる利点があ
る。よって本発明は従来の問題点を解決した廃棄物焼却
灰の溶融固化方法として、価値の大きいものである。As described above, according to the method for melting and solidifying waste incineration ash of the present invention, it is possible to melt and solidify waste incineration ash to obtain a stable vitrified body containing heavy metals. it can. In addition, there is an advantage that the secondary treatment such as solidification of the melt fly ash with cement or chelate as in the related art becomes unnecessary. Therefore, the present invention is of great value as a method for melting and solidifying waste incineration ash that solves the conventional problems.
【図１】本発明のフローシートである。FIG. 1 is a flow sheet of the present invention.
【図２】誘導加熱炉の断面図である。FIG. 2 is a sectional view of an induction heating furnace.
１ るつぼ、２ 炉体、３ 電極、４ ガラスの溶融
層、５ 溶融塩（融点降下剤）の層、６ 被溶融物の層1 crucible, 2 furnace body, 3 electrodes, 4 molten glass layer, 5 molten salt (melting point depressant) layer, 6 molten material layer
Claims (5)
着剤と水とを加えて脱塩処理したのち脱水し、これにSi
O2および融点降下剤を混合してSiO2/(廃棄物焼却灰＋Si
O2系吸着剤＋SiO2) ＝40〜60％、水分30％以下に調整
し、これを誘導加熱炉により溶融し固化することを特徴
とする廃棄物焼却灰の溶融固化方法。1. A waste incinerated ash is added with 20 to 40% of an SiO 2 -based adsorbent and water, desalted, dehydrated, and dehydrated.
Mix O 2 and melting point depressant to make SiO 2 / (waste incineration ash + Si
A method for melting and solidifying waste incineration ash, which comprises adjusting an O 2 -based adsorbent + SiO 2 ) = 40 to 60% and a water content of 30% or less, and melting and solidifying the same in an induction heating furnace.
あるいは溶融スラグとからゼオライトを生成し、これを
SiO2系吸着剤として使用する請求項１に記載の廃棄物焼
却灰の溶融固化方法。2. Zeolite is produced from the dewatered waste liquid after desalination treatment and waste incineration ash or molten slag.
The method for melting and solidifying waste incineration ash according to claim 1, which is used as an SiO 2 adsorbent.
剤を使用する請求項１に記載の廃棄物焼却灰の溶融固化
方法。3. The method for melting and solidifying waste incineration ash according to claim 1, wherein a granular or pelletized SiO 2 -based adsorbent is used.
融塩を使用する請求項１に記載の廃棄物焼却灰の溶融固
化方法。4. The method according to claim 1, wherein a molten salt such as Na 2 CO 3 or NaNO 3 is used as a melting point depressant.
に加熱し、セラミックフィルターで集塵する請求項１に
記載の廃棄物焼却灰の溶融固化方法。5. Exhaust gas generated during melting is 600 to 1000 ° C.
2. The method for melting and solidifying waste incineration ash according to claim 1, wherein the waste incineration ash is heated and the dust is collected by a ceramic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6000416A JP3045916B2 (en) | 1994-01-07 | 1994-01-07 | Melting and solidification of waste incineration ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6000416A JP3045916B2 (en) | 1994-01-07 | 1994-01-07 | Melting and solidification of waste incineration ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07195055A JPH07195055A (en) | 1995-08-01 |
| JP3045916B2 true JP3045916B2 (en) | 2000-05-29 |
Family
ID=11473202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6000416A Expired - Fee Related JP3045916B2 (en) | 1994-01-07 | 1994-01-07 | Melting and solidification of waste incineration ash |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3045916B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3028314B1 (en) * | 1999-05-06 | 2000-04-04 | 健 神佐 | Method and apparatus for induction heating and melting of metal oxide-containing powders |
| CN100354052C (en) * | 2004-12-21 | 2007-12-12 | 中国环境科学研究院 | Additive for fusing fly ash in use for refuse burning process |
| JP5973932B2 (en) * | 2013-02-15 | 2016-08-23 | 佐内 藤田 | Processing method and processing plant for garbage and sewage sludge incineration ash |
| CN105251758A (en) * | 2015-11-13 | 2016-01-20 | 广东省环境科学研究院 | Complex flux for fusion of waste incineration fly ash |
| CN112495984B (en) * | 2020-10-27 | 2021-10-01 | 清大国华环境集团股份有限公司 | Hazardous waste solidification/stabilization comprehensive treatment method |
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1994
- 1994-01-07 JP JP6000416A patent/JP3045916B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07195055A (en) | 1995-08-01 |
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