JPH10192819A - Method for stabilizing and solidifying incineration fly ash and dust containing chlorine, alkali and harmful heavy metal and solidified product - Google Patents
Method for stabilizing and solidifying incineration fly ash and dust containing chlorine, alkali and harmful heavy metal and solidified productInfo
- Publication number
- JPH10192819A JPH10192819A JP9013193A JP1319397A JPH10192819A JP H10192819 A JPH10192819 A JP H10192819A JP 9013193 A JP9013193 A JP 9013193A JP 1319397 A JP1319397 A JP 1319397A JP H10192819 A JPH10192819 A JP H10192819A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- water
- alkali
- fly ash
- harmful heavy
- 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.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 48
- 239000010881 fly ash Substances 0.000 title claims abstract description 36
- 239000003513 alkali Substances 0.000 title claims abstract description 24
- 229910052801 chlorine Inorganic materials 0.000 title claims abstract description 24
- 239000000460 chlorine Substances 0.000 title claims abstract description 24
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000000087 stabilizing effect Effects 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002893 slag Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000004898 kneading Methods 0.000 claims abstract description 14
- 238000007711 solidification Methods 0.000 claims abstract description 7
- 230000008023 solidification Effects 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims 1
- 230000003179 granulation Effects 0.000 claims 1
- 238000010828 elution Methods 0.000 abstract description 6
- 239000004035 construction material Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 18
- 239000002956 ash Substances 0.000 description 12
- 239000010440 gypsum Substances 0.000 description 10
- 229910052602 gypsum Inorganic materials 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 235000010755 mineral Nutrition 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000011400 blast furnace cement Substances 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007922 dissolution test Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一般廃棄物、下水
汚泥、産業廃棄物等を焼却する際に集塵された塩素、ア
ルカリおよび有害重金属を多く含む焼却飛灰およびセメ
ント等を生産する施設あるいは焼却施設に設置された塩
素、アルカリバイパス装置によって強制的に取り出した
ダストを安定固定化方法に関する。また、土木、建築の
建設資材としての所要の強度を発現させた塩素、アルカ
リ、有害重金属を含む焼却飛灰およびダストの固化生成
物を提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for producing incinerated fly ash and cement containing a large amount of chlorine, alkali and harmful heavy metals collected when incinerating general waste, sewage sludge, industrial waste and the like. Alternatively, the present invention relates to a method for stably fixing dust that is forcibly taken out by a chlorine or alkali bypass device installed in an incineration facility. Another object of the present invention is to provide a solidified product of incinerated fly ash and dust containing chlorine, alkali, and harmful heavy metal, which has required strength as a construction material for civil engineering and buildings.
【０００２】[0002]
【従来の技術】一般家庭から排出される一般廃棄物は地
方自治体で焼却され、焼却主灰と電気集塵器やバグフィ
ルター装置で捕集した焼却飛灰（特別管理一般廃棄物）
を混合して、セメント固化あるいはキレート作用を有す
る薬剤処理して管理型の最終処分場で埋め立て処分され
ている。また、近年、一般廃棄物の焼却灰を減容および
無害化するために、焼却灰を溶融する技術が確立され、
一部の自治体で実用化されている。しかしながら、この
溶融法でも排ガスの集塵工程から塩素、アルカリおよび
有害金属を多く含む集塵ダストが発生し、従来と同様な
処理処分を行っている。従来技術においてセメント固化
する場合には、普通ポルトランドセメントや高炉セメン
トあるいはこれらのセメントに石膏を添加したＰＨが１
２以上のセメントが使用されている。2. Description of the Related Art General waste discharged from general households is incinerated by local governments, and incinerated fly ash collected by an incinerator main ash and an electric dust collector or bag filter device (special management municipal waste).
Are mixed and treated with cement having a solidifying or chelating action, and landfilled at a controlled final disposal site. In recent years, technology to melt incinerated ash has been established in order to reduce the volume and harmlessness of incinerated ash from general waste.
Practical in some municipalities. However, even in this melting method, dust collection dust containing a large amount of chlorine, alkali and harmful metals is generated from the dust collection step of the exhaust gas, and the same treatment and disposal as in the past is performed. In the case of solidifying cement in the prior art, ordinary portland cement, blast furnace cement, or PH obtained by adding gypsum to these cements is 1%.
Two or more cements are used.
【０００３】セメント産業においては、近年、産業廃棄
物や下水汚泥等の有効活用が進むにつれて、原料および
燃料から持ち込まれる塩素およびアルカリが多くなり、
焼成工程におけるプレ詰まり等の運転上のトラブル解消
とセメントの品質維持（ＪＩＳ規格、塩素量２００ｐｐ
ｍ以下、Ｒ2 Ｏ ０．７５％以下）のために、焼成工程
に塩素、アルカリバイパス装置を設置し、排ガスから強
制的に塩素とアルカリを主成分としたダストを取り出し
ている。このダストはセメント生産の仕上げ工程で、Ｊ
ＩＳ規格を満足する範囲でセメントに添加されて処理さ
れる。In the cement industry, chlorine and alkali brought in from raw materials and fuels have increased in recent years as industrial waste and sewage sludge have been effectively utilized.
Eliminate operational troubles such as pre-clogging in the firing process and maintain cement quality (JIS standard, chlorine content 200pp
m or less, R 2 O 0.75% or less), a chlorine and alkali bypass device is installed in the firing step, and dust containing chlorine and alkali as main components is forcibly extracted from the exhaust gas. This dust is used in the finishing process of cement production.
It is added to cement and treated within the range satisfying the IS standard.
【０００４】[0004]
【発明が解決しようとする課題】焼却主灰（火格子灰、
落塵、熱回収灰等排ガス処理の工程で発生する灰をい
う）は、一般的に塩素、アルカリおよび有害重金属の含
有量は少なく、従来のセメント固化やキレート作用のあ
る薬剤処理で問題はないが、焼却飛灰および焼却灰の溶
融工程の排ガス集塵ダストは高濃度の塩素、アルカリお
よび有害重金属を多量に含むため、より確実な方法で処
理処分する必要がある。SUMMARY OF THE INVENTION Incineration ash (grate ash,
Ash, which is generated in the process of exhaust gas treatment such as dust fall, heat recovery ash, etc.) generally has a low content of chlorine, alkali and harmful heavy metals, and there is no problem with conventional cement solidification or chemical treatment with chelating action. Since the incineration fly ash and the flue gas dust collected in the incineration ash melting process contain a large amount of high concentrations of chlorine, alkali and harmful heavy metals, they must be treated and disposed of in a more reliable manner.
【０００５】セメント産業の焼成工程に設置された塩
素、アルカリバイパス装置から発生するダストの場合に
は、現状のセメントのＪＩＳ規格の範囲内での処理（有
効利用）であれば問題はない。しかしながら、産業廃棄
物等の処理量が多くなれば当然発生するダスト量が多く
なり、セメントの添加物だけでは処分できなくなるこ
と、さらには、産業廃棄物の種類によってはダストの中
に有害重金属の含有量が多くなり焼却飛灰と同様に、よ
り確実な方法で処理処分をしなければならない。[0005] In the case of chlorine and dust generated from an alkali bypass device installed in a sintering process of the cement industry, there is no problem as long as the existing cement is treated (effectively used) within the JIS standard range. However, if the amount of industrial waste treated increases, the amount of dust generated naturally increases, making it impossible to dispose of it only with cement additives.Furthermore, depending on the type of industrial waste, harmful heavy metals may be included in the dust. Due to its high content, it must be disposed of in a more reliable manner, as with incinerated fly ash.
【０００６】本発明は、塩素、アルカリおよび有害重金
属を含む焼却飛灰およびダストを高炉水砕スラグ微粉末
を含有したＰＨが１２以下の水硬性材料で安定固化させ
る方法と、それによって得られる固化生成物の利用を目
的とするものである。The present invention provides a method for stably solidifying incinerated fly ash and dust containing chlorine, alkali and harmful heavy metals with a hydraulic material containing fine granulated blast furnace slag and having a pH of 12 or less, and the solidification obtained by the method. The purpose is to use the product.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の塩素、アルカリ、有害重金属を含む焼却飛
灰およびダストの安定固化方法は、焼却灰のうち各種集
塵器によって集められた塩素、アルカリおよび重金属を
多く含む焼却飛灰および塩素、アルカリバイパス装置に
よって焼成工程の排ガスから強制的に取り出したダスト
に高炉水砕スラグ微粉末を含有したＰＨが１２以下の水
硬性材料を適量、水と共に添加混練することを特徴とす
るものである。According to the present invention, there is provided a method for stably solidifying incinerated fly ash and dust containing chlorine, alkali, and harmful heavy metal, which is collected by various dust collectors among incinerated ash. Incinerated fly ash containing a large amount of chlorine, alkali and heavy metals, and a suitable amount of hydraulic material with a pH of 12 or less containing blast furnace granulated slag fine powder in dust forcibly extracted from the exhaust gas of the firing process by a chlorine and alkali bypass device And kneading with water.
【０００８】また、本発明の塩素、アルカリ、有害重金
属を含む焼却飛灰およびダストの固化生成物は、上記の
安定固化方法において、水硬性材料と焼却飛灰あるいは
ダストの比率、および水／水硬性材料の比を調整し、さ
らに、水と混練するときに減水剤を添加し、混練水量を
低減して所要の強度を発現させたことを特徴とするもの
である。Further, the solidified product of incinerated fly ash and dust containing chlorine, alkali and harmful heavy metal according to the present invention can be obtained by the above-mentioned stable solidification method, wherein the ratio of hydraulic material to incinerated fly ash or dust, water / water The present invention is characterized in that the ratio of the hard material is adjusted, and a water reducing agent is added when kneading with water to reduce the amount of kneading water to achieve required strength.
【０００９】[0009]
【発明の実施の形態】以下本発明の実施の形態について
説明する。本発明者らは、焼却飛灰およびダストの化学
成分と鉱物組成ならびに有害重金属の溶出特性、すなわ
ち、焼却飛灰およびダストは、アルカリ成分を多く含む
ためにＰＨが１２以上あり、塩素イオン、アルカリイオ
ン、硫酸イオンの溶出が早いこと、カドミウム（Ｃｄ）
はＰＨが１１以上で溶出が抑制されること、鉛（Ｐｂ）
はＰＨ１０〜１１．５で溶出が抑制されることに着目
し、ＰＨが１２以下の範囲で焼却飛灰およびダストをい
かにして経済的に固化させるか鋭意研究し、本発明を完
成するに至った。Embodiments of the present invention will be described below. The present inventors have found that the chemical composition and mineral composition of incinerated fly ash and dust and the elution characteristics of harmful heavy metals, that is, incinerated fly ash and dust have a pH of 12 or more because they contain a large amount of alkali components, and chlorine ions, alkaline Fast elution of ions and sulfate ions, cadmium (Cd)
Is that elution is suppressed at PH of 11 or more, lead (Pb)
Paying attention to the fact that elution is suppressed at pH 10 to 11.5, and earnestly studied how to economically solidify incinerated fly ash and dust in the pH range of 12 or less, and completed the present invention. Was.
【００１０】すなわち、本発明は、アルカリ性である焼
却飛灰およびダストに高炉水砕スラグ微粉末を含有した
ＰＨが１２以の水硬性材料を適量、水と共に添加混練す
ることを特徴とする焼却飛灰およびダストの安定固化方
法であり、土木、建築の建設資材等としての所要の強度
を発現させたことを特徴とする焼却飛灰およびダストを
含有した安定な固化生成物である。That is, the present invention is characterized by adding and kneading an appropriate amount of a hydraulic material having a pH of 12 or more containing granulated blast furnace slag to alkaline incinerated fly ash and dust together with water. This is a stable solidification method for ash and dust, and is a stable solidified product containing incinerated fly ash and dust characterized by exhibiting required strength as a construction material for civil engineering and construction.
【００１１】高炉水砕スラグ微粉末は、焼却飛灰および
ダスト中に含まれる生石灰、塩化カルシウム、塩化カリ
ウム、塩化ナトリウム、硫酸カルシウム、硫酸カリウム
等のアルカリ性鉱物、塩化物、硫酸塩の刺激を受けて水
和硬化するとともに、これらの鉱物を水和組織にとりこ
み、また、Ｐｂ，Ｃｄ，Ｃｒ等の有害重金属をも安定化
させる作用がある。従って、高アルカリ性の焼却飛灰お
よびダストの場合には高炉水砕スラグ微粉末だけで安定
固化することができる。高炉水砕スラグ微粉末を含有し
たＰＨが１２以下の水硬性材料は、例えば、高炉水砕ス
ラグ微粉末１００〜７０％と石膏０〜３０％の配合であ
り、焼却飛灰およびダスト中に石膏（硫酸カルシウム）
が充分含有している場合は、高炉水砕スラグ微粉末１０
０％で良く、焼却飛灰およびダスト中の石膏が少ない場
合は石膏を添加することが好ましい。ここで使用する石
膏は、無水石膏、半水石膏、２水石膏のいずれでも使用
できる。また、粉末度は、３０００ｃｍ2 ／ｇ以上が好
ましい。高炉水砕スラグ微粉末の粒度は特に限定される
ものではないが、粉末度が、３０００ｃｍ2 ／ｇ以上、
好ましくは６０００ｃｍ2 ／ｇ以上である。The granulated blast furnace slag powder is stimulated by alkaline minerals such as quicklime, calcium chloride, potassium chloride, sodium chloride, calcium sulfate and potassium sulfate, chlorides and sulfates contained in incineration fly ash and dust. In addition to hydration hardening, these minerals are incorporated into the hydrated structure, and also act to stabilize harmful heavy metals such as Pb, Cd, and Cr. Therefore, in the case of incinerated fly ash and dust of high alkalinity, it can be solidified and stabilized only with the granulated blast furnace slag fine powder. Hydraulic material having a pH of 12 or less containing the granulated blast furnace slag powder is, for example, a blend of 100 to 70% of the granulated blast furnace slag powder and 0 to 30% of gypsum. (Calcium sulfate)
Is sufficiently contained, the granulated blast furnace slag powder 10
0% may be sufficient, and when gypsum in incineration fly ash and dust is small, it is preferable to add gypsum. The gypsum used here can be any of anhydrous gypsum, gypsum hemihydrate and gypsum. The fineness is preferably 3000 cm 2 / g or more. The particle size of the granulated blast furnace slag powder is not particularly limited, but the fineness is 3000 cm 2 / g or more,
Preferably it is 6000 cm 2 / g or more.
【００１２】水硬性材料と焼却飛灰およびダストと水を
混練する際に、市販のキレート作用のある薬剤と併用し
て使用することもできる。キレート作用のある薬剤を併
用する場合は、固化生成物のＰＨが１２以下となる範囲
で使用することが好ましい。When kneading the hydraulic material with incinerated fly ash and dust and water, it can be used in combination with a commercially available chelating agent. When a chelating agent is used in combination, it is preferable to use the solidified product in a pH range of 12 or less.
【００１３】また、当然のことであるが、本発明に基づ
いて、都市ゴミ焼却灰等の一般の焼却灰を容易に安定固
定化することができる。Further, as a matter of course, according to the present invention, general incineration ash such as municipal garbage incineration ash can be easily and stably fixed.
【００１４】本発明に使用するＰＨが１２以下の高炉水
砕スラグ微粉末を含有した水硬性材料としては、高炉水
砕スラグ微粉末単味、高炉水砕スラグ微粉末と石膏から
なる水硬性材料、高硫酸塩スラグセメント、および普
通、早強、超早強、中庸熱、ビーライト等の各種ポルト
ランドセメントにフライアッシュ、高炉水砕スラグ微粉
末、シリカ、石灰石微粉末、石膏、アーウィン鉱物、カ
ルシウムアルミネート鉱物、シリカフュ−ムのうち１〜
数種類を混合した混合セメント、さらにアルミナセメン
トに高炉水砕スラグ微粉末、石灰石微粉末、石膏、各種
ポルトランドセメントのうち１〜４種類を混合した混合
セメントである。The hydraulic material containing granulated blast furnace slag fine powder having a pH of 12 or less used in the present invention includes a granulated blast furnace granulated slag fine powder, a hydraulic blast furnace granulated slag fine powder and gypsum. , High sulphate slag cement, and various types of Portland cement such as ordinary, fast strong, ultra fast, medium heat, belite, fly ash, granulated blast furnace slag fine powder, silica, limestone fine powder, gypsum, Irwin mineral, calcium Aluminate mineral, silica fume 1 ~
It is a mixed cement in which several types are mixed, and further a mixed cement in which 1 to 4 types of blast furnace granulated slag fine powder, limestone fine powder, gypsum, and various Portland cements are mixed with alumina cement.
【００１５】さらに、本発明である上記焼却飛灰および
ダストの安定固化方法において、水硬性材料と焼却飛灰
あるいはダストの比率を調整すること、および水／水硬
性材料の比を調整すること、さらに、水と混練するとき
に減水剤、高性能減水剤、高性能ＡＥ減水剤を添加して
混練水量を低減することにより、所要の強度を発現した
固化生成物を得ることができる。[0015] Further, in the method for stably solidifying incinerated fly ash and dust according to the present invention, the ratio of the hydraulic material to the incinerated fly ash or dust is adjusted, and the ratio of the water / hydraulic material is adjusted. Furthermore, by adding a water reducing agent, a high performance water reducing agent and a high performance AE water reducing agent when kneading with water to reduce the amount of kneading water, it is possible to obtain a solidified product having the required strength.
【００１６】また、必要に応じて、砂や砂利等の骨材、
パーライトやゼオライト等の軽量骨材、カーボン繊維、
ビニロン繊維あるいはガラス繊維等の繊維物質も使用す
ることが可能である。しかし、鉄筋を使用する場合に
は、防錆処理をした鉄筋を使用しなければならない。固
化生成物の養生は、特に限定されるものではないが、蒸
気養生等の加温養生することが生産性向上の面から好ま
しい。If necessary, aggregates such as sand and gravel,
Light aggregate such as perlite and zeolite, carbon fiber,
Fiber materials such as vinylon fibers or glass fibers can also be used. However, when using a reinforcing bar, it is necessary to use a rust-proofing reinforcing bar. Curing of the solidified product is not particularly limited, but heating and curing such as steam curing are preferable from the viewpoint of improving productivity.
【００１７】このようにして作製した固化生成物は、ポ
ルトランドセメントや高炉セメントを用いて作製したコ
ンクリート二次製品と同様の性能を有している。The solidified product thus produced has the same performance as a secondary concrete product produced using Portland cement or blast furnace cement.
【００１８】［実施例１］川崎市のゴミ焼却場から出さ
れた焼却飛灰２５％，高炉水砕スラグ微粉末６７．５
％，無水石膏７．５％、水５０％の重量割合で混練し
て、材令７日間、ビニール袋中で養生したものについて
溶出試験を行った。溶出試験は固化したものを１〜５ｍ
ｍに粗砕し、２４時間蒸留水中でシェイキングし、上澄
水のＰＨ、カドミウム、シアン、鉛、六価クロウム、ひ
素、アルキル水銀、ＰＣＢについて行った。ＰＨは１
０．９であり、カドミウムは０．００６ｍｇ／ｌ、鉛は
０．０２ｍｇ／ｌ，全水銀は０．０００１ｍｇ／ｌとい
ずれも有害物の判定基準に達しない値であった。Example 1 25% incinerated fly ash and 67.5 blast furnace granulated slag fine powder discharged from a garbage incineration plant in Kawasaki City
%, Anhydrous gypsum 7.5%, and water 50% were kneaded and cured in a plastic bag for 7 days. In the dissolution test, the solidified material is 1 to 5 m
m, shaken in distilled water for 24 hours, and performed on the pH of the supernatant water, cadmium, cyanide, lead, hexavalent chromium, arsenic, alkylmercury, and PCB. PH is 1
0.9, 0.006 mg / l for cadmium, 0.02 mg / l for lead, and 0.0001 mg / l for total mercury, all of which were below the harmful substance criteria.
【００１９】［実施例２］セメント工場から発生した塩
素、アルカリバイパスダストと高炉水砕スラグ微粉末を
用いて、ＪＩＳ Ｒ ５２０１によるモルタルの圧縮強
度試験を行った。高炉水砕スラグ微粉末は粉末度が８０
００ｃｍ２／ｇのものを使用し、モルタルの配合は水／
スラグ＋ダスト＝０．６５、スラグ＋ダスト：ＩＳＯ６
７９準拠砂＝１：２とした。材令３日までビニール袋中
で養生、その後２０℃水中養生とした。その試験結果は
図１の表１に示す通りである。[Example 2] A mortar compressive strength test according to JIS R5201 was performed using chlorine, alkali bypass dust and fine granulated blast furnace slag powder generated from a cement plant. Granulated blast furnace slag powder has a fineness of 80
00cm2 / g, and the mortar was mixed with water /
Slag + dust = 0.65, slag + dust: ISO6
79-compliant sand = 1: 2. Curing was carried out in a plastic bag until 3 days of age, followed by curing in water at 20 ° C. The test results are as shown in Table 1 of FIG.
【００２０】[0020]
【発明の効果】以上述べたように本発明の焼却飛灰およ
びダストの安定固化方法は、製鉄所から副生する高炉水
砕スラグを粉砕した高炉水砕スラグ微粉末と石膏からな
る水硬性材料を使用して、これまで困難とされてきた焼
却飛灰およびダスト中に含まれる有害物質の溶出を防止
することができる。また、本発明による固化生成物は、
水硬性材料と焼却飛灰およびダストの比率を調整するこ
と、および水／水硬性材料の比を調整し、さらに、水と
混練するときに減水剤を添加して混練水量を低減するこ
とにより、強度を任意の強度に設定することができ、土
木、建築の建設資材として有効利用することができる。As described above, the method for stably solidifying incinerated fly ash and dust according to the present invention is a hydraulic material comprising blast furnace granulated slag fine powder obtained by crushing granulated blast furnace slag by-produced from an ironworks and gypsum. Can be used to prevent the elution of harmful substances contained in incinerated fly ash and dust, which has been considered difficult. Further, the solidified product according to the present invention comprises:
By adjusting the ratio of hydraulic material and incineration fly ash and dust, and adjusting the ratio of water / hydraulic material, and further adding a water reducing agent when kneading with water to reduce the amount of kneading water, The strength can be set to any strength, and can be effectively used as construction materials for civil engineering and construction.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明におけるモルタル強度試験結果を示す表FIG. 1 is a table showing the results of a mortar strength test in the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大門 正機 東京都町田市つくし野１−５−３ (72)発明者 坂井 悦郎 千葉県市川市東大和田２−５−１−503 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Masaki Daimon Tsukushino 1-5-3, Machida-shi, Tokyo (72) Inventor Sakuro Etsuro 2-5-1-503 Higashi-Owada, Ichikawa-shi, Chiba
Claims (2)
れた塩素、アルカリおよび重金属を多く含む焼却飛灰お
よび塩素、アルカリバイパス装置によって焼成工程の排
ガスから強制的に取り出したダストに高炉水砕スラグ微
粉末を含有したＰＨが１２以下の水硬性材料を適量、水
と共に添加混練することを特徴とする塩素、アルカリ、
有害重金属を含む焼却飛灰およびダストの安定固化方
法。1. Blast furnace water granulation into incinerated fly ash containing a large amount of chlorine, alkali and heavy metals collected by various dust collectors and dust forcibly extracted from the exhaust gas of the firing process by an alkali bypass device. Chlorine, alkali, characterized by adding and kneading an appropriate amount of a hydraulic material containing slag fine powder and having a pH of 12 or less together with water.
Method for stable solidification of incinerated fly ash and dust containing harmful heavy metals.
て、水硬性材料と焼却飛灰あるいはダストの比率、およ
び水／水硬性材料の比を調整し、さらに、水と混練する
ときに減水剤を添加し、混練水量を低減して所要の強度
を発現させたことを特徴とする塩素、アルカリ、有害重
金属を含む焼却飛灰およびダストの固化生成物。2. The stable solidification method according to claim 1, wherein the ratio of the hydraulic material to the incinerated fly ash or dust and the ratio of the water / hydraulic material are adjusted, and the water reducing agent is added when kneading with water. A solidified product of incinerated fly ash and dust containing chlorine, alkali, and harmful heavy metals, characterized in that the required strength is exhibited by reducing the amount of kneading water by adding water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9013193A JPH10192819A (en) | 1997-01-10 | 1997-01-10 | Method for stabilizing and solidifying incineration fly ash and dust containing chlorine, alkali and harmful heavy metal and solidified product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9013193A JPH10192819A (en) | 1997-01-10 | 1997-01-10 | Method for stabilizing and solidifying incineration fly ash and dust containing chlorine, alkali and harmful heavy metal and solidified product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10192819A true JPH10192819A (en) | 1998-07-28 |
Family
ID=11826335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9013193A Pending JPH10192819A (en) | 1997-01-10 | 1997-01-10 | Method for stabilizing and solidifying incineration fly ash and dust containing chlorine, alkali and harmful heavy metal and solidified product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10192819A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002320954A (en) * | 2001-04-24 | 2002-11-05 | Onoda Chemico Co Ltd | Heavy metal elution inhibitor of heavy metal contaminated soil and method for inhibiting elution of heavy metal |
| JP2015217314A (en) * | 2014-05-13 | 2015-12-07 | 国立研究開発法人国立環境研究所 | Processing method of incineration ash |
| CN111732353A (en) * | 2020-07-17 | 2020-10-02 | 长沙紫宸科技开发有限公司 | Method for treating sand-based waste incineration fly ash by using cement kiln in cooperation |
| CN114712767A (en) * | 2022-04-24 | 2022-07-08 | 长江水利委员会长江科学院 | Method for fixing chlorine and stabilizing heavy metal in fly ash |
-
1997
- 1997-01-10 JP JP9013193A patent/JPH10192819A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002320954A (en) * | 2001-04-24 | 2002-11-05 | Onoda Chemico Co Ltd | Heavy metal elution inhibitor of heavy metal contaminated soil and method for inhibiting elution of heavy metal |
| JP4663905B2 (en) * | 2001-04-24 | 2011-04-06 | 小野田ケミコ株式会社 | Heavy metal elution inhibitor and heavy metal elution control method for heavy metal contaminated soil |
| JP2015217314A (en) * | 2014-05-13 | 2015-12-07 | 国立研究開発法人国立環境研究所 | Processing method of incineration ash |
| CN111732353A (en) * | 2020-07-17 | 2020-10-02 | 长沙紫宸科技开发有限公司 | Method for treating sand-based waste incineration fly ash by using cement kiln in cooperation |
| CN114712767A (en) * | 2022-04-24 | 2022-07-08 | 长江水利委员会长江科学院 | Method for fixing chlorine and stabilizing heavy metal in fly ash |
| CN114712767B (en) * | 2022-04-24 | 2023-02-14 | 长江水利委员会长江科学院 | Method for fixing chlorine and stabilizing heavy metal in fly ash |
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