JPH0699167B2 - Method for manufacturing waste molten slag - Google Patents
Method for manufacturing waste molten slagInfo
- Publication number
- JPH0699167B2 JPH0699167B2 JP7493290A JP7493290A JPH0699167B2 JP H0699167 B2 JPH0699167 B2 JP H0699167B2 JP 7493290 A JP7493290 A JP 7493290A JP 7493290 A JP7493290 A JP 7493290A JP H0699167 B2 JPH0699167 B2 JP H0699167B2
- Authority
- JP
- Japan
- Prior art keywords
- molten slag
- waste
- slag
- cao
- content
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、建設汚泥（シールド掘削工法、杭打ち工法等
による工事で排出される泥土）、上下水道汚泥、都市ご
み焼却物、食品・紙パルプ業界等の産業汚泥等の廃棄物
を溶融処理して、高強度で結晶質の溶融スラグを製造す
る方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to construction sludge (mud discharged from construction by shield excavation method, pile driving method, etc.), water and sewage sludge, municipal waste incinerated matter, food and paper. The present invention relates to a method for producing a high-strength, crystalline molten slag by melting a waste such as industrial sludge in the pulp industry.
本発明の方法により製造された溶融スラグは、埋戻材、
路盤材、アスファルト骨材、コンクリート骨材、ろ過砂
等に使用することができる。The molten slag produced by the method of the present invention is a backfill material,
It can be used for roadbed, asphalt aggregate, concrete aggregate, filter sand, etc.
近年、建設汚泥等の廃棄物の処分地の確保が困難になっ
てきており、産業廃棄物として安定化と減容化だけでな
く、再資源化が求められている。In recent years, it has become difficult to secure a disposal site for waste such as construction sludge, and it is required not only to stabilize and reduce the volume of industrial waste, but also to recycle it.
従来、廃棄物に高CaO源材を添加し、溶融する技術が知
られている。しかし、この場合、高強度で、結晶質のス
ラグを得るためには、50℃/Hr以下の速度で冷却する必
要がある。Conventionally, a technique of adding a high CaO source material to waste and melting it is known. However, in this case, in order to obtain crystalline slag with high strength, it is necessary to cool at a rate of 50 ° C./hr or less.
本発明者らは、高強度で、結晶質の溶融スラグを得るた
めに、種々研究した結果、CaO源材、及びSiO2／Al2O3モ
ル比0.5〜５のAl2O3源材を廃棄物を組成調整すると、高
強度で、結晶質のスラグが、100℃/Hr以上の冷却速度で
でも得られることを知見した。また、SiO2／Al2O3モル
比0.5〜５のムライト含有Al2O3源材を用いると、添加材
が種晶となり、500℃/Hr以上の冷却速度ででも、高強度
の結晶質の溶融スラグが得られることを知見した。The inventors of the present invention have conducted various studies to obtain a crystalline molten slag with high strength, and as a result, CaO source material and Al 2 O 3 source material having a SiO 2 / Al 2 O 3 molar ratio of 0.5 to 5 have been obtained. It has been found that when the composition of waste is adjusted, crystalline slag with high strength can be obtained even at a cooling rate of 100 ° C / Hr or more. Further, when a mullite-containing Al 2 O 3 source material having a SiO 2 / Al 2 O 3 molar ratio of 0.5 to 5 is used, the additive material becomes a seed crystal, and even at a cooling rate of 500 ° C./Hr or more, high strength crystalline material is obtained. It was found that the molten slag of
本発明は上記の諸点に鑑みなされたもので、廃棄物を予
め組成調整することにより、高強度で、結晶質の溶融ス
ラグを製造する方法を提供することを目的とするもので
ある。The present invention has been made in view of the above points, and an object thereof is to provide a method for producing a crystalline molten slag with high strength by adjusting the composition of waste in advance.
上記の目的を達成するために、本発明の廃棄物溶融スラ
グの製造方法は、廃棄物溶融スラグのCaO含有量が５〜2
0wt％、Al2O3含有量が15〜30wt％となるように、CaO源
材、及びSiO2／Al2O3モル比0.5〜５のAl2O3源材を廃棄
物に添加してCaO含有量及びAl2O3含有量のみを調整し、
溶融した後、冷却することにより、溶融物を結晶化させ
ることを特徴としている。In order to achieve the above object, the method for producing waste molten slag according to the present invention has a CaO content of the waste molten slag of 5 to 2
A CaO source material and an Al 2 O 3 source material having a SiO 2 / Al 2 O 3 molar ratio of 0.5 to 5 were added to the waste so that 0 wt% and the Al 2 O 3 content were 15 to 30 wt%. Adjusting only CaO content and Al 2 O 3 content,
It is characterized in that the melt is crystallized by cooling after melting.
Al2O3含有量が15〜30wt％で、CaO含有量が5wt％未満の
場合は、結晶成分が生成せず、20wt％を越える場合は、
効果がそれ以上向上せず添加材費が高くなる。When the Al 2 O 3 content is 15 to 30 wt% and the CaO content is less than 5 wt%, no crystalline component is generated, and when it exceeds 20 wt%,
The effect does not improve any more and the cost of the additive material increases.
また、CaO含有量が５〜20wt％で、Al2O3含有量が15wt％
未満の場合は、結晶成分が生成せず、30wt％を越える場
合は、溶融温度が高くなり炉の運転が難しくなる。Also, the CaO content is 5 to 20 wt% and the Al 2 O 3 content is 15 wt%.
If it is less than 30% by weight, no crystalline component is produced, and if it exceeds 30% by weight, the melting temperature becomes high and the operation of the furnace becomes difficult.
CaO源材としては、石灰石、消石灰、生石灰、炭酸カル
シウム、貝殻等が用いられる。As the CaO source material, limestone, slaked lime, quick lime, calcium carbonate, shells and the like are used.
また、SiO2／Al2O3モル比0.5〜５のAl2O3源材として
は、焼成すればムライトを生成する粘土、ムライトを含
有するレンガ・磁器等の破砕物、アルミナとシリカとか
ら合成したもの等が用いられる。The Al 2 O 3 source material having a SiO 2 / Al 2 O 3 molar ratio of 0.5 to 5 includes clay that produces mullite when fired, crushed materials such as bricks and porcelain containing mullite, and alumina and silica. A synthesized product or the like is used.
SiO2／Al2O3モル比0.5未満の場合、及び５を越える場合
は、いずれも結晶成分が生成しない。When the SiO 2 / Al 2 O 3 molar ratio is less than 0.5 and exceeds 5, no crystal component is formed.
以上のことから、つぎの３つの条件を満足させることに
より、廃棄物を溶融した後、冷却処理する工程だけで、
溶融物を結晶化させることができる。From the above, by satisfying the following three conditions, only the process of cooling the waste after melting the waste,
The melt can be crystallized.
（１）溶融スラグのCaO含有量が５〜20wt％となるよう
にCaO源材で調整する。(1) The CaO source material is adjusted so that the CaO content of the molten slag is 5 to 20 wt%.
（２）溶融スラグのAl2O3含有量が15〜30wt％となるよ
うにAl2O3源材で調整する。(2) Adjust the Al 2 O 3 source material so that the content of Al 2 O 3 in the molten slag is 15 to 30 wt%.
（３）Al2O3源材としてSiO2／Al2O3モル比0.5〜５のも
のを用いる。(3) A SiO 2 / Al 2 O 3 molar ratio of 0.5 to 5 is used as the Al 2 O 3 source material.
以下、本発明の実施例及び比較例について説明する。実
施例及び比較例における圧壊強度は、木屋式硬度計を用
い、3mmの球形粒子が破壊する強度である。Hereinafter, examples and comparative examples of the present invention will be described. The crush strength in Examples and Comparative Examples is the strength at which spherical particles of 3 mm are broken using a Kiya hardness meter.
比較例１ 乾燥した建設汚泥（SiO2 65wt％、Al2O3 14wt％、CaO 3
wt％）を1500℃で溶融した後、100℃/Hrの速度で冷却し
てスラグを得た。このスラグの圧壊強度は10Kg/3mmφ
で、Ｘ線回折で結晶質成分は認められなかった。Comparative Example 1 Dry construction sludge (SiO 2 65 wt%, Al 2 O 3 14 wt%, CaO 3
wt%) was melted at 1500 ° C and then cooled at a rate of 100 ° C / Hr to obtain a slag. The crush strength of this slag is 10kg / 3mmφ
No crystalline component was found by X-ray diffraction.
比較例２ 比較例１と同じ建設汚泥に対して石灰石20wt％添加し、
1400℃で溶融した後、100℃/Hrの速度で冷却してスラグ
を得た。このスラグの圧壊強度は10Kg/3mmφで、Ｘ線回
折で結晶質成分は認められなかった。Comparative Example 2 The same construction sludge as in Comparative Example 1 was added with 20 wt% of limestone,
After melting at 1400 ° C, the slag was obtained by cooling at a rate of 100 ° C / Hr. The crush strength of this slag was 10 kg / 3 mmφ, and no crystalline component was observed by X-ray diffraction.
実施例１ 第１図に示す装置を用いて行った。比較例１と同じ建設
汚泥に対して石灰石10wt％、SiO2／Al2O3モル比2.5のム
ライト含有レンガ破砕物10wt％を添加し、溶融炉１で15
00℃で溶融した後、冷却装置２で600℃/Hrの速度で冷却
してスラグを得た。スラグの圧壊強度は25Kg/3mmφで、
Ｘ線回折でかなりの結晶質成分が認められた。３はスラ
グ排出装置である。Example 1 This was carried out using the apparatus shown in FIG. To the same construction sludge as in Comparative Example 1, 10 wt% of limestone and 10 wt% of mullite-containing brick crushed matter having a SiO 2 / Al 2 O 3 molar ratio of 2.5 were added, and melted in a melting furnace 1 at 15%.
After melting at 00 ° C, the slag was obtained by cooling at a rate of 600 ° C / Hr with the cooling device 2. The crushing strength of slag is 25Kg / 3mmφ,
A considerable amount of crystalline component was recognized by X-ray diffraction. 3 is a slag discharge device.
実施例２ 第１図に示す装置を用いて行った。比較例１と同じ建設
汚泥に対して石灰石10wt％、SiO2／Al2O3モル比4.0の粘
土15wt％を添加し、溶融炉１で1500℃で溶融した後、冷
却装置２で300℃/Hrの速度で冷却してスラグを得た。ス
ラグの圧壊強度は20Kg/3mmφで、Ｘ線回折ではかなりの
結晶質成分が認められた。Example 2 This was carried out using the apparatus shown in FIG. To the same construction sludge as in Comparative Example 1, 10 wt% of limestone and 15 wt% of clay having a SiO 2 / Al 2 O 3 molar ratio of 4.0 were added and melted at 1500 ° C. in a melting furnace 1, and then 300 ° C. in a cooling device 2. A slag was obtained by cooling at a rate of Hr. The crushing strength of the slag was 20 kg / 3 mmφ, and a considerable amount of crystalline component was recognized by X-ray diffraction.
本発明は上記のように構成されているので、つぎのよう
な効果を奏する。Since the present invention is configured as described above, it has the following effects.
（１）廃棄物のCaO、Al2O3のみの成分調整を行い、溶
融、冷却した後、再加熱処理を行うことなく、廃棄物を
溶融、冷却するだけの簡単な工程により、高強度で、結
晶質の溶融スラグを得ることができ、再資源化を図るこ
とができる。(1) High strength with a simple process of adjusting the components of waste CaO and Al 2 O 3 only, melting and cooling, and then melting and cooling the waste without reheating treatment. , Crystalline molten slag can be obtained, and recycling can be achieved.
（２）廃棄物の安定化及び減容化を図ることができる。(2) Stabilization and volume reduction of waste can be achieved.
第１図は本発明の実施例において用いた廃棄物溶融スラ
グの製造装置を示す説明図である。 １…溶融炉、２…冷却装置、３…スラグ排出装置FIG. 1 is an explanatory view showing an apparatus for producing waste molten slag used in an example of the present invention. 1 ... Melting furnace, 2 ... Cooling device, 3 ... Slag discharge device
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−54247（ＪＰ，Ａ) 特開 昭59−164668（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-54247 (JP, A) JP-A-59-164668 (JP, A)
Claims (1)
％、Al2O3含有量が15〜30wt％となるように、CaO源材、
及びSiO2／Al2O3モル比0.5〜５のAl2O3源材を廃棄物に
添加してCaO含有量及びAl2O3含有量のみを調整し、溶融
した後、冷却することにより、溶融物を結晶化させるこ
とを特徴とする廃棄物溶融スラグの製造方法。1. The waste molten slag has a CaO content of 5 to 20 wt.
%, Al 2 O 3 content is 15 to 30 wt%, CaO source material,
And by adding an Al 2 O 3 source material having a SiO 2 / Al 2 O 3 molar ratio of 0.5 to 5 to the waste to adjust only the CaO content and the Al 2 O 3 content, melting, and then cooling. A method for producing a waste molten slag, which comprises crystallizing a melt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7493290A JPH0699167B2 (en) | 1990-03-23 | 1990-03-23 | Method for manufacturing waste molten slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7493290A JPH0699167B2 (en) | 1990-03-23 | 1990-03-23 | Method for manufacturing waste molten slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03275539A JPH03275539A (en) | 1991-12-06 |
| JPH0699167B2 true JPH0699167B2 (en) | 1994-12-07 |
Family
ID=13561623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7493290A Expired - Fee Related JPH0699167B2 (en) | 1990-03-23 | 1990-03-23 | Method for manufacturing waste molten slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699167B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933546B2 (en) * | 1979-10-09 | 1984-08-16 | 日本碍子株式会社 | Method for manufacturing crystallized aggregate using sewage sludge residue as raw material |
| JPS59164668A (en) * | 1983-03-10 | 1984-09-17 | 日本碍子株式会社 | Manufacture of aggregate |
-
1990
- 1990-03-23 JP JP7493290A patent/JPH0699167B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03275539A (en) | 1991-12-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |