JPH0699168B2 - Method for manufacturing waste molten slag - Google Patents
Method for manufacturing waste molten slagInfo
- Publication number
- JPH0699168B2 JPH0699168B2 JP7493390A JP7493390A JPH0699168B2 JP H0699168 B2 JPH0699168 B2 JP H0699168B2 JP 7493390 A JP7493390 A JP 7493390A JP 7493390 A JP7493390 A JP 7493390A JP H0699168 B2 JPH0699168 B2 JP H0699168B2
- Authority
- JP
- Japan
- Prior art keywords
- sio
- molten slag
- waste
- slag
- 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を75〜95w
t％含有するSiO2源材で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、SiO275〜95wt％のト
リジマイト含有のSiO2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 present inventors have conducted various studies to obtain a crystalline molten slag with high strength. As a result, a CaO source material and SiO 2 of 75 to 95 w were obtained.
It has been found that when the composition of waste is adjusted with a SiO 2 source material containing t%, a high-strength, crystalline slag can be obtained even at a cooling rate of 100 ° C / Hr or more. Further, when a SiO 2 source material containing 75 to 95 wt% SiO 2 tridymite is used, the additive material becomes a seed crystal, and high-strength crystalline molten slag can be obtained even at a cooling rate of 500 ° C./Hr or more. I found out.
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％、SiO2含有量が70〜90wt％となるように、CaO源
材、及びSiO2を75〜95wt％含有するSiO2源材を廃棄物に
添加してCaO含有量及びSiO2含有量のみを調整し、溶融
点よりもはるかに高い約1400℃以上の温度で溶融した
後、冷却することにより、溶融物を結晶化することを特
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
0 wt%, as the content of SiO 2 is 70～90Wt%, CaO Minamotozai, and CaO content of SiO 2 source material of SiO 2 containing 75～95Wt% was added to the waste and SiO 2 content It is characterized in that the melt is crystallized by adjusting only that, melting at a temperature of about 1400 ° C. or higher, which is much higher than the melting point, and then cooling.
SiO2含有量が70〜90wt％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 SiO 2 content is 70 to 90 wt% and the CaO content is less than 5 wt%, no crystal component is formed, and when it exceeds 20 wt%, the effect is not further improved and the cost of the additive increases.
また、CaO含有量が５〜20wt％で、SiO2含有量が70wt％
未満の場合は、結晶成分が生成せず、90wt％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。Further, CaO content is 5 to 20 wt%, SiO 2 content of 70 wt%
If it is less than 90% by weight, no crystal component is produced. If it exceeds 90% 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を75〜95wt％含有するSiO2源材としては、焼
成すればトリジマイトを生成する粘土、トリジマイトを
含有する鉱物破砕物、ケイ砂・ケイ石にNaOH・KOH等を
添加し溶融処理して得られた合成トリジマイト等が用い
られる。なお、トリジマイトとは、SiO2の化学組成で示
され、石英、クリストバライトとは異なる結晶構造を有
する物質である。In addition, as the SiO 2 source material containing 75 to 95 wt% of SiO 2 , clay that produces tridymite when fired, mineral crushed material containing tridymite, and NaOH / KOH etc. added to silica sand / silica to perform melt processing The synthetic tridymite and the like obtained in this manner are used. Note that tridymite is a substance represented by the chemical composition of SiO 2 and having a crystal structure different from that of quartz and cristobalite.
SiO2源材でSiO2含有量が75wt％未満の場合、及び95wt％
を越える場合は、いずれも結晶成分が生成しない。When SiO 2 content is less than 75 wt% of SiO 2 source material, and 95 wt%
If it exceeds, no crystal component is formed.
以上のことから、つぎの４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 four 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SiO2含有量が70〜90wt％となるよう
にSiO2源材で調整する。(2) Adjust with a SiO 2 source material so that the SiO 2 content of the molten slag is 70 to 90 wt%.
（３）SiO2源材としてsiO2を75〜95wt％含有するものを
用いる。(3) A SiO 2 source material containing 75 to 95 wt% of siO 2 is used.
（４）溶融点よりもはるかに高い約1400℃以上の温度で
溶融する。(4) Melts at a temperature of about 1400 ° C or higher, which is much higher than the melting point.
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 乾燥した建築汚泥（SiO265wt％、Al2O314wt％、CaO3wt
％）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 building 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％、トリジマイトを含んだSiO2
90wt％含有のSiO2源材15wt％を添加し、溶融炉１で1500
℃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22kg/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. SiO 2 containing 10 wt% of limestone and tridymite in the same construction sludge as in Comparative Example 1.
Add 15 wt% of SiO 2 source material containing 90 wt% and 1500 in melting furnace 1.
After melting at ℃, it was cooled at a rate of 600 ℃ / Hr in the cooling device 2 to obtain a slag. The crushing strength of slag is 22kg / 3mmφ, X
A considerable amount of crystalline component was found by line 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を80wt％含有した粘土
20wt％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. Clay containing 10 wt% of limestone and 80 wt% of SiO 2 in the same construction sludge as in Comparative Example 1.
After adding 20 wt% and melting at 1500 ° C. in the melting furnace 1, it was cooled at a rate of 300 ° C./Hr in the cooling device 2 to obtain a slag. 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、SiO2のみの成分調整を行い、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) It is possible to obtain high-strength, crystalline molten slag by a simple process of adjusting the components of only CaO and SiO 2 of the waste, melting and cooling, and aiming at recycling. it can.
（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
Claims (1)
％、SiO2含有量が70〜90wt％となるように、CaO源材、
及びSiO2を75〜95wt％含有するSiO2源材を廃棄物に添加
してCaO含有量及びSiO2含有量のみを調整し、溶融点よ
りもはるかに高い約1400℃以上の温度で溶融した後、冷
却することにより、溶融物を結晶化することを特徴とす
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.
%, SiO 2 content of 70 to 90 wt%, CaO source material,
And SiO 2 source material of SiO 2 containing 75～95Wt% was added to the waste to adjust only the CaO content and SiO 2 content was melted at a much higher about 1400 ° C. or higher temperature than the melting point After that, by cooling, the melt is crystallized, and a method for producing a waste molten slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7493390A JPH0699168B2 (en) | 1990-03-23 | 1990-03-23 | Method for manufacturing waste molten slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7493390A JPH0699168B2 (en) | 1990-03-23 | 1990-03-23 | Method for manufacturing waste molten slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03275540A JPH03275540A (en) | 1991-12-06 |
| JPH0699168B2 true JPH0699168B2 (en) | 1994-12-07 |
Family
ID=13561652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7493390A Expired - Fee Related JPH0699168B2 (en) | 1990-03-23 | 1990-03-23 | Method for manufacturing waste molten slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699168B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997007072A1 (en) * | 1995-08-14 | 1997-02-27 | Chichibu Onoda Cement Corporation | Curable composition and cured article |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4510330B2 (en) * | 2001-06-26 | 2010-07-21 | 株式会社神鋼環境ソリューション | Melting method and slag manufacturing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51105329A (en) * | 1975-03-13 | 1976-09-17 | Kubota Ltd |
-
1990
- 1990-03-23 JP JP7493390A patent/JPH0699168B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997007072A1 (en) * | 1995-08-14 | 1997-02-27 | Chichibu Onoda Cement Corporation | Curable composition and cured article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03275540A (en) | 1991-12-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |