JPH08301636A - Water granulation treatment of melded slag - Google Patents
Water granulation treatment of melded slagInfo
- Publication number
- JPH08301636A JPH08301636A JP7129448A JP12944895A JPH08301636A JP H08301636 A JPH08301636 A JP H08301636A JP 7129448 A JP7129448 A JP 7129448A JP 12944895 A JP12944895 A JP 12944895A JP H08301636 A JPH08301636 A JP H08301636A
- Authority
- JP
- Japan
- Prior art keywords
- water
- stored
- slag
- water tank
- stored water
- 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.)
- Granted
Links
Landscapes
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶融スラグの水砕処理方
法に関する。都市ごみ、下水処理汚泥、産業廃棄物等、
各種の廃棄物を焼却処理すると、焼却残渣が発生する。
焼却残渣は、焼却炉に残る焼却灰と、焼却炉の排ガス処
理系で捕捉される、主として排ガス処理系の集塵装置で
捕捉される飛灰とに大別されるが、かかる焼却残渣は一
般に、これを減容化及び安定化するため、溶融炉で溶融
処理される。焼却残渣を溶融炉で溶融処理すると、溶融
スラグが生成するが、溶融スラグは溶融炉の炉壁に開設
されているスラグ排出口から通常はオーバーフローで排
出される。スラグ排出口からオーバーフローで排出され
た溶融スラグは、そのままでは取扱いができないため、
一般に水砕処理され、水砕スラグとなる。水砕スラグは
埋立処分されるか又は土木建築材料等として利用される
が、いずれにしても該水砕スラグには重金属類の溶出が
少ない安定なものであることが求められる。本発明は、
得られる水砕スラグから重金属類が溶出するのを低減で
きる、溶融スラグの水砕処理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 water granulation of molten slag. Municipal waste, sewage treatment sludge, industrial waste, etc.
Incineration residue is generated when various wastes are incinerated.
The incineration residue is roughly divided into incineration ash remaining in the incinerator and fly ash captured by the exhaust gas treatment system of the incinerator, mainly by the dust collector of the exhaust gas treatment system, but such incineration residue is generally In order to reduce and stabilize the volume, it is melted in a melting furnace. When the incineration residue is melted in a melting furnace, molten slag is produced, but the molten slag is normally discharged by overflow from a slag discharge port provided in the furnace wall of the melting furnace. The molten slag discharged by overflow from the slag discharge port cannot be handled as it is,
Generally, it is granulated to form granulated slag. The granulated slag is landfilled or used as a civil engineering building material or the like, and in any case, the granulated slag is required to be stable so that heavy metals are hardly eluted therein. The present invention
The present invention relates to a method for water granulation of molten slag, which can reduce the elution of heavy metals from the water granulated slag obtained.
【０００２】[0002]
【従来の技術】従来、溶融炉のスラグ排出口から排出さ
れた溶融スラグの水砕処理方法として、スラグ排出口を
臨んでその下方に水槽を設置し、この水槽に水を貯留し
て、スラグ排出口から排出された溶融スラグを水槽の貯
留水中に落下させることが行なわれている（特開昭６２
−１７２１０７）。この場合、水砕効率を上げるため、
スラグ排出口と水槽との間にノズルを装備し、このノズ
ルから落下途中の溶融スラグへ水を噴射することも行な
われており、また水槽中の貯留水に水流を形成させるた
め、貯留水の一部を抜き出して循環させることも行なわ
れている。そして水槽中の貯留水は水砕処理に伴って汚
染されるので、その一部を抜き出して排水処理設備へ供
した後に放水し、その一方で不足分に見合う貯留水をノ
ズルからの噴射水の形で或は直接に水槽へ補給すること
が行なわれている。ところが、かかる従来法によると、
実際問題として、水槽から掻き出した水砕スラグが多量
の重金属類を溶出するという欠点がある。2. Description of the Related Art Conventionally, as a method for water granulation of molten slag discharged from a slag discharge port of a melting furnace, a water tank is installed below the slag discharge port, and water is stored in this water tank. The molten slag discharged from the discharge port is dropped into the stored water in the water tank (JP-A-62-62).
-172107). In this case, in order to improve water granulation efficiency,
A nozzle is provided between the slag discharge port and the water tank, and water is also sprayed from this nozzle to the molten slag that is in the process of falling, and in order to form a water flow in the stored water in the water tank, It is also practiced to extract a part and circulate it. Since the stored water in the aquarium is contaminated during the water granulation process, a part of it is extracted and supplied to the wastewater treatment facility before being discharged, while the stored water corresponding to the shortage is sprayed from the nozzle. Replenishment to the aquarium in form or directly is performed. However, according to the conventional method,
As a practical problem, there is a drawback that the granulated slag scraped out from the water tank elutes a large amount of heavy metals.
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、従来法では、得られる水砕スラグが多量の
重金属類を溶出する点である。The problem to be solved by the present invention is that in the conventional method, the obtained granulated slag elutes a large amount of heavy metals.
【０００４】[0004]
【課題を解決するための手段】しかして本発明は、溶融
炉のスラグ排出口から排出された溶融スラグを水砕処理
するに際し、溶融スラグを水砕処理する水槽中の貯留水
の一部を抜き出して濾過し、抜き出した貯留水に含まれ
ている重金属類の粒子を濾別した後、濾過水を水槽へ返
送することを特徴とする溶融スラグの水砕処理方法に係
る。DISCLOSURE OF THE INVENTION In the present invention, however, a part of the stored water in the water tank in which the molten slag is granulated is hydrolyzed when the molten slag discharged from the slag discharge port of the melting furnace is granulated. The present invention relates to a method for water granulation of molten slag, which comprises extracting and filtering, filtering heavy water particles contained in the extracted stored water, and returning the filtered water to a water tank.
【０００５】本発明では、溶融スラグを水砕処理する水
槽中の貯留水の一部を抜き出して濾過し、抜き出した貯
留水に含まれている重金属類の粒子を濾別した後、濾過
水を水槽へ返送する。水砕スラグそれ自体は、その形態
からして、重金属類の溶出が殆どない極めて安定なもの
であるが、前述した従来法では実際のところ、水槽から
掻き出した水砕スラグについて溶出試験（環境庁告示第
１３号、昭和４８年）を行なうと、重金属類の溶出が多
い。そこでその原因を追究したところ、水槽から掻き出
した水砕スラグの表面に該水槽の貯留水中に含まれてい
る重金属類が付着するためであることが判った。溶融炉
のスラグ排出口からオーバーフローで排出された溶融ス
ラグはその下方に設置されている水槽の貯留水中に落下
する。この際、未溶融の焼却残渣、ダスト、溶融塩等が
貯留水中に落下するのを完全には避けられず、これらに
起因して、溶融スラグの水砕処理に伴い貯留水が汚染さ
れ、貯留水に含まれてくる重金属類の濃度が高くなり、
この重金属類が水砕スラグの表面に付着した状態で水槽
から掻き出されるのである。実際、水槽から掻き出した
水砕スラグについて、溶出試験の結果で鉛濃度が０．０
７８mg／リットルのものを充分に水洗浄すると、鉛濃度
が０．００７mg／リットルになる。In the present invention, a part of the stored water in the water tank for hydrolyzing the molten slag is extracted and filtered, and the heavy metal particles contained in the extracted stored water are filtered off. Return to the aquarium. The granulated slag itself is extremely stable due to its form, with almost no elution of heavy metals, but in the above-mentioned conventional method, actually, the granulated slag scraped out from the water tank was subjected to the dissolution test (Environment Agency). Notification No. 13, 1973) shows that heavy metals are often eluted. Then, when the cause was investigated, it was found that the heavy metals contained in the water stored in the water tank adhered to the surface of the granulated slag scraped out from the water tank. The molten slag discharged by overflow from the slag discharge port of the melting furnace falls into the stored water in the water tank installed below it. At this time, it is unavoidable that unmelted incineration residue, dust, molten salt, etc. fall into the stored water, and due to these, the stored water is contaminated due to the water granulation process of the molten slag, The concentration of heavy metals contained in water increases,
The heavy metals are scraped out of the water tank while adhering to the surface of the granulated slag. Actually, regarding the granulated slag scraped out from the water tank, the lead concentration was 0.0 in the result of the dissolution test.
If 78 mg / liter is thoroughly washed with water, the lead concentration becomes 0.007 mg / liter.
【０００６】したがって、得られる水砕スラグの重金属
類溶出量を低減させるためには、水槽の貯留水を常時で
きるだけ清浄に保つことが重要である。その方法として
は、もともと水槽の貯留水はその一部を抜き出して排水
処理設備に供し、その一方で抜き出した貯留水に見合う
量の新たな水を水槽へ補給しているところ、水槽から抜
き出す貯留水の量を多くして、これに見合う大量の新た
な水を水槽へ補給することが考えられる。しかしなが
ら、このような方法は、相応に大きな排水処理設備を必
要とし、実際的でない。そこで水槽の貯留水を常時でき
るだけ清浄に保つ実際的な方法について検討したとこ
ろ、貯留水に含まれている重金属類はその殆どが粒子の
形態で存在しており、したがってかかる貯留水の一部を
抜き出して濾過し、抜き出した貯留水に含まれている重
金属類の粒子を濾別した後、濾過水を水槽へ返送すれば
よいことを見出した。表１は濾過径の異なる３種の濾紙
を用いて、溶融スラグの水砕処理に伴い汚染された貯留
水を濾過したときの、濾過水中の鉛濃度の測定結果を例
示するものであるが、この表１からも、貯留水中におい
て重金属類の殆どが粒子の形態で存在していることが判
る。Therefore, in order to reduce the elution amount of heavy metals in the obtained granulated slag, it is important to keep the water stored in the water tank as clean as possible at all times. As a method, originally, a part of the stored water in the aquarium is extracted and supplied to the wastewater treatment facility, while the amount of new water commensurate with the extracted stored water is replenished to the aquarium. It is possible to increase the amount of water and supply a large amount of new water corresponding to this to the aquarium. However, such a method requires a correspondingly large waste water treatment facility and is not practical. Therefore, when we examined a practical method to keep the stored water in the tank as clean as possible at all times, most of the heavy metals contained in the stored water existed in the form of particles, and therefore some of the stored water was It has been found that it is sufficient to return the filtered water to the water tank after extracting and filtering, filtering out the heavy metal particles contained in the extracted stored water. Table 1 illustrates the measurement results of the lead concentration in the filtered water when the stored water contaminated with the water granulation process of the molten slag is filtered using three types of filter papers having different filtration diameters. It can be seen from Table 1 that most of the heavy metals are present in the form of particles in the stored water.
【０００７】[0007]
【表１】 [Table 1]
【０００８】本発明において、水槽から抜き出して濾過
する貯留水の量は、焼却残渣の性状、溶融炉の種類や大
きさ、更には水槽の形状や大きさ等にもよるが、通常、
溶融処理する焼却残渣量（トン／時）の３〜３０倍量
（m3／時）とする。水槽から抜き出した貯留水の濾過に
用いる装置は、それが該貯留水に含まれている粒子状の
重金属類を濾別できるものであれば特に制限されない
が、濾材として濾布、濾紙、砂、セラミック粒、プラス
チック粒、ウォールナッツ、珪藻土等を用いたものが有
利であり、なかでも砂を用いたものすなわち砂濾過装置
が好ましい。濾過はケーク濾過或は清澄濾過のどちらで
もよく、濾過に際しては加圧操作或は減圧操作を施すこ
ともできる。濾過に先立って、水槽から抜き出した貯留
水に無機系凝集剤や有機高分子系凝集剤を加えて凝集処
理を行なうのも有効である。水槽の貯留水はそのｐＨを
１１以下のアルカリ性に維持するのが好ましい。鉛、
銅、亜鉛等の重金属類はアルカリ性下において溶解度が
低いからであるが、余りにもアルカリ性にすると、なか
には逆に溶解度が高くなる重金属類もあり、作業者にと
っても危険であるからである。In the present invention, the amount of stored water to be withdrawn from the water tank and filtered depends on the properties of the incineration residue, the type and size of the melting furnace, and the shape and size of the water tank.
The amount is 3 to 30 times (m 3 / hour) of the amount of incineration residue to be melted (ton / hour). The device used for filtering the stored water extracted from the water tank is not particularly limited as long as it is capable of filtering particulate heavy metals contained in the stored water, but as a filter material, a filter cloth, filter paper, sand, Those using ceramic particles, plastic particles, walnut, diatomaceous earth, etc. are advantageous, and among them, those using sand, that is, a sand filter device are preferable. The filtration may be either cake filtration or clarification filtration, and a pressure operation or a pressure reduction operation may be carried out during the filtration. Prior to the filtration, it is also effective to add an inorganic coagulant or an organic polymer coagulant to the stored water extracted from the water tank to perform the coagulation treatment. It is preferable to maintain the pH of the stored water in the water tank at an alkaline of 11 or less. lead,
This is because heavy metals such as copper and zinc have low solubilities under alkaline conditions. However, if they are too alkaline, some of the heavy metals, on the contrary, have high solubilities, which is dangerous for workers.
【０００９】[0009]
【実施例】図１は本発明の一実施状態を略示する系統図
である。溶融炉１１で都市ごみの焼却残渣Ａを溶融処理
している。焼却残渣Ａを溶融処理すると、溶融スラグＢ
が発生するが、溶融スラグＢは溶融炉１１の炉壁に開設
されたスラグ排出口１２からオーバーフローで排出され
ている。スラグ排出口１２の下方には水槽２１が設置さ
れており、水槽２１には貯留水２２が蓄えられている。
スラグ排出口１２からオーバーフローで排出された溶融
スラグＢは水槽２１の貯留水２２へ自重で落下し、ここ
で水砕処理されて、水砕スラグＣとなっている。水槽２
１には掻き出しコンベア２３が装備されており、水砕ス
ラグＣは掻き出しコンベア２３で水槽２１から掻き出さ
れている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram schematically showing one embodiment of the present invention. The incinerator residue A of the municipal solid waste is melted in the melting furnace 11. When incineration residue A is melted, molten slag B
However, the molten slag B is discharged by overflow from the slag discharge port 12 formed in the furnace wall of the melting furnace 11. A water tank 21 is installed below the slag discharge port 12, and stored water 22 is stored in the water tank 21.
The molten slag B discharged by overflow from the slag discharge port 12 falls into the stored water 22 of the water tank 21 by its own weight, and is subjected to water granulation treatment to be granulated slag C. Aquarium 2
1 is equipped with a scraping conveyor 23, and the granulated slag C is scraped out of the water tank 21 by the scraping conveyor 23.
【００１０】水槽２１の貯留水２２はその一部がポンプ
３１で抜き出され、抜き出された貯留水２２の一部が排
水処理設備３２で排水処理された後に放水されており、
抜き出された貯留水２２の残部が循環水として水槽２１
へ返送されていて、排水処理設備３２へ供された貯留水
２２に見合う量の新たな補給水が水槽２３へ補給されて
いる。一方、水槽２１の貯留水２２はその一部がポンプ
４１で抜き出され、抜き出された貯留水２２は濾過装置
４２で濾過されて、ここで貯留水２２に含まれる粒子状
の重金属類が濾別された後、濾過水が水槽２１へ返送さ
れている。A part of the stored water 22 in the water tank 21 is extracted by the pump 31, and a part of the extracted stored water 22 is discharged by the waste water treatment facility 32 and then discharged.
The remaining part of the extracted stored water 22 is used as circulating water in the water tank 21.
The water tank 23 is replenished with a quantity of new make-up water commensurate with the stored water 22 supplied to the waste water treatment facility 32. On the other hand, a part of the stored water 22 in the water tank 21 is extracted by the pump 41, and the extracted stored water 22 is filtered by the filtration device 42, where particulate heavy metals contained in the stored water 22 are removed. After being filtered off, the filtered water is returned to the water tank 21.
【００１１】実施例１ 図１の系統図にしたがい、下記の条件下で溶融スラグを
水砕処理した。２４時間連続して水砕処理したときの、
貯留水の鉛濃度は２．４mg／リットルであり、また水槽
から掻き出した水砕スラグの鉛溶出量（環境庁告示第１
３号、昭和４８年）は０．０２７mg／リットルであっ
た。 条件：焼却残渣の溶融処理量＝都市ごみの焼却灰を１ト
ン／時、貯留水量＝２００m3、貯留水のｐＨ＝８．１、
排水処理設備に供した貯留水量＝２m3／時、濾過装置に
供した貯留水量＝５m3／時、使用した濾過装置＝大同ハ
イドロメーション社製の超急速濾過装置（商品名インデ
プスフィルタ）Example 1 According to the system diagram of FIG. 1, the molten slag was water granulated under the following conditions. When water granulation treatment is performed continuously for 24 hours,
The lead concentration in the stored water is 2.4 mg / liter, and the lead elution amount of the granulated slag scraped out from the water tank (Environment Agency Notification No. 1
No. 3, 1973) was 0.027 mg / liter. Conditions: melting treatment amount of incineration residue = 1 ton / hour of incinerated ash of municipal solid waste, amount of stored water = 200 m 3 , pH of stored water = 8.1,
Amount of stored water supplied to wastewater treatment equipment = 2 m 3 / hour, Amount of stored water supplied to filtration equipment = 5 m 3 / hour, filtration equipment used = Ultra-rapid filtration equipment (trade name: Indepth Filter) manufactured by Daido Hydromation
【００１２】比較例１ 図１の系統図にしたがい、実施例１と同じ条件下で溶融
スラグを水砕処理した。但しここでは、水槽から貯留水
の一部を抜き出して濾過装置に供する操作を行なわなか
った。２４時間連続して水砕処理したときの、貯留水の
鉛濃度は６．５mg／リットルであり、また水槽から掻き
出した水砕スラグの鉛溶出量は０．０７８mg／リットル
であった。Comparative Example 1 According to the system diagram of FIG. 1, the molten slag was water granulated under the same conditions as in Example 1. However, here, the operation of extracting a part of the stored water from the water tank and supplying it to the filtering device was not performed. When water was continuously granulated for 24 hours, the lead concentration in the stored water was 6.5 mg / liter, and the amount of lead eluted from the granulated slag scraped out from the water tank was 0.078 mg / liter.
【００１３】[0013]
【発明の効果】既に明らかなように、以上説明した本発
明には、得られる水砕スラグからの重金属類の溶出を低
減できるという効果がある。As is apparent from the above, the present invention described above has the effect of reducing the elution of heavy metals from the obtained water granulated slag.
【図１】本発明の一実施状態を示す系統図。FIG. 1 is a system diagram showing an embodiment of the present invention.
１１・・・溶融炉、１２・・・スラグ排出口、２１・・
・水槽、２２・・・貯留水、２３・・・掻き出しコンベ
ア、３１，４１・・・ポンプ、３２・・・排水処理設
備、４２・・・濾過装置11 ... Melting furnace, 12 ... Slag discharge port, 21 ...
・ Water tank, 22 ... Stored water, 23 ... Scraping conveyor, 31, 41 ... Pump, 32 ... Wastewater treatment facility, 42 ... Filtration device
Claims (2)
融スラグを水砕処理するに際し、溶融スラグを水砕処理
する水槽中の貯留水の一部を抜き出して濾過し、抜き出
した貯留水に含まれている重金属類の粒子を濾別した
後、濾過水を水槽へ返送することを特徴とする溶融スラ
グの水砕処理方法。1. When the molten slag discharged from the slag discharge port of the melting furnace is subjected to water granulation treatment, a part of the stored water in the water tank for granulating the molten slag is extracted and filtered to obtain the extracted stored water. A method for water granulation of molten slag, which comprises filtering the contained heavy metal particles and returning the filtered water to a water tank.
性に維持する請求項１記載の溶融スラグの水砕処理方
法。2. The method for water granulation of molten slag according to claim 1, wherein the stored water in the water tank is kept alkaline at a pH of 11 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12944895A JP3684556B2 (en) | 1995-04-27 | 1995-04-27 | Method of granulating molten slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12944895A JP3684556B2 (en) | 1995-04-27 | 1995-04-27 | Method of granulating molten slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08301636A true JPH08301636A (en) | 1996-11-19 |
| JP3684556B2 JP3684556B2 (en) | 2005-08-17 |
Family
ID=15009735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12944895A Expired - Lifetime JP3684556B2 (en) | 1995-04-27 | 1995-04-27 | Method of granulating molten slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3684556B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005139027A (en) * | 2003-11-06 | 2005-06-02 | Takuma Co Ltd | Method for preventing elution of heavy metals from slag and apparatus therefor |
| KR100748411B1 (en) * | 2005-05-30 | 2007-08-10 | 닛코 킨조쿠 가부시키가이샤 | Method for processing of copper smelting slag |
| JP2008105897A (en) * | 2006-10-25 | 2008-05-08 | Takuma Co Ltd | Molten slag-treating facility, and molten slag treatment method using the facility |
| JP2008196711A (en) * | 2006-09-07 | 2008-08-28 | Kobelco Eco-Solutions Co Ltd | Melting device for incineration ash |
| JP2009215090A (en) * | 2008-03-07 | 2009-09-24 | Pan Pacific Copper Co Ltd | METHOD FOR PREVENTING ELUTION OF As FROM COPPER SLAG |
| JP2011169005A (en) * | 2010-02-17 | 2011-09-01 | Nippon Steel Engineering Co Ltd | Ground surface water discharge structure and method for constructing the same |
| JP2012082119A (en) * | 2010-10-14 | 2012-04-26 | Jfe Engineering Corp | Water granulation device and water granulation method of waste molten slag |
-
1995
- 1995-04-27 JP JP12944895A patent/JP3684556B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005139027A (en) * | 2003-11-06 | 2005-06-02 | Takuma Co Ltd | Method for preventing elution of heavy metals from slag and apparatus therefor |
| KR100748411B1 (en) * | 2005-05-30 | 2007-08-10 | 닛코 킨조쿠 가부시키가이샤 | Method for processing of copper smelting slag |
| JP2008196711A (en) * | 2006-09-07 | 2008-08-28 | Kobelco Eco-Solutions Co Ltd | Melting device for incineration ash |
| JP2008105897A (en) * | 2006-10-25 | 2008-05-08 | Takuma Co Ltd | Molten slag-treating facility, and molten slag treatment method using the facility |
| JP2009215090A (en) * | 2008-03-07 | 2009-09-24 | Pan Pacific Copper Co Ltd | METHOD FOR PREVENTING ELUTION OF As FROM COPPER SLAG |
| US7998240B2 (en) | 2008-03-07 | 2011-08-16 | Pan Pacific Copper Co., Ltd. | Process of preventing as elution from copper slag |
| KR101146412B1 (en) * | 2008-03-07 | 2012-05-17 | 판 퍼시픽 카파 가부시끼가이샤 | Method for water granulating process of copper smelting slag |
| JP2011169005A (en) * | 2010-02-17 | 2011-09-01 | Nippon Steel Engineering Co Ltd | Ground surface water discharge structure and method for constructing the same |
| JP2012082119A (en) * | 2010-10-14 | 2012-04-26 | Jfe Engineering Corp | Water granulation device and water granulation method of waste molten slag |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3684556B2 (en) | 2005-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102811967B (en) | Treatment method and treatment device for converting chlorine-containing waste into raw material for cement | |
| CN1735468A (en) | Method and device for treating incineration fly ash | |
| JPH08301636A (en) | Water granulation treatment of melded slag | |
| JPH08503415A (en) | Method and apparatus for treating glass objects containing dangerous substances | |
| JP2007069185A (en) | Method for washing inorganic matter | |
| JP3408693B2 (en) | Fly ash treatment method | |
| JPH08261438A (en) | Method and equipment for treating solid combustion residue of combustion facility,particularly garbage incinerating facility | |
| JP3426234B2 (en) | Method for treating combustion residues and purifying combustion fumes | |
| JP2002210447A (en) | Treatment of discharged material from melting furnace | |
| JP2003130318A (en) | Industrial waste treatment plant | |
| JP2003334510A (en) | Chlorine removing treatment method for molten fly ash | |
| JP3549135B2 (en) | Waste melting treatment equipment with slag cleaning device and method for producing granulated slag | |
| JP3820247B2 (en) | Heavy metal recovery device, heavy metal recovery method and waste treatment device | |
| WO1998024938A1 (en) | Extraction of metals from heavy metal-bearing wastes | |
| JP3735789B2 (en) | Incineration fly ash treatment method and apparatus | |
| JPH10510759A (en) | Ash stabilization | |
| JP3851206B2 (en) | Fly ash treatment method | |
| JP2005177757A (en) | Calcium-and heavy metal-containing matter treatment method | |
| JP2000061421A (en) | Treatment of waste | |
| JP2005046714A (en) | System for processing molten flyash from melting furnace and method for processing molten flyash | |
| JPH0959046A (en) | Treating apparatus of molten slag as waste material | |
| JP2004167350A (en) | Processing method of incineration ash | |
| JP3347673B2 (en) | Waste treatment method | |
| JPH09208274A (en) | Water granular for molten slag | |
| JPH11226558A (en) | Continuous process for detoxification of fly ash, separation of salt and recycling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040831 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040913 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050509 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050522 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090610 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100610 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110610 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110610 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120610 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120610 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130610 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130610 Year of fee payment: 8 |
|
| EXPY | Cancellation because of completion of term |