JPH0333050A - Method for cooling interlocked brick made of sludge incineration ash in its calcination - Google Patents
Method for cooling interlocked brick made of sludge incineration ash in its calcinationInfo
- Publication number
- JPH0333050A JPH0333050A JP1167687A JP16768789A JPH0333050A JP H0333050 A JPH0333050 A JP H0333050A JP 1167687 A JP1167687 A JP 1167687A JP 16768789 A JP16768789 A JP 16768789A JP H0333050 A JPH0333050 A JP H0333050A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- calcination
- incineration ash
- sludge incineration
- rate
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 239000011449 brick Substances 0.000 title claims abstract description 20
- 239000010802 sludge Substances 0.000 title claims abstract description 10
- 238000001354 calcination Methods 0.000 title abstract 4
- 238000000034 method Methods 0.000 title description 4
- 238000010304 firing Methods 0.000 claims description 14
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、汚泥焼却灰からなるインターロッキングレン
ガの焼成時における冷却方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for cooling interlocking bricks made of sludge incineration ash during firing.
（従来の技術と解決すべき課題）
従来、インターロッキングレンガ等のレンガあるいは瓦
の製造に際しては、製品の部分的な割れ、１ｉ１ｉ椙笠
ｙｊ；−訪「ト１４−かつ、生産効謁の向卜を図るため
、焼成後の冷却工程は、約６５０℃までを急冷（たとえ
ば、３００℃／ｈ）し、その後徐冷するようにしている
。(Conventional technology and problems to be solved) Conventionally, when manufacturing bricks such as interlocking bricks or roof tiles, problems such as partial cracking of the product, problems with production efficiency, etc. In order to improve the temperature, in the cooling step after firing, the temperature is rapidly cooled to about 650° C. (for example, 300° C./h), and then slowly cooled.
そこで、汚泥焼却灰をプレス成形したインターロッキン
グレンガ用成形体は、従来のレンガ、瓦に無機成分が類
似し、見掛は上、普通のレンガと似ていることにより、
この成形体に前記冷却工程を実施したところ、得られた
焼成体は、部分的な割れ、破損あるいは亀裂があり、ま
た、曲げ強度か低いという欠点かあった。Therefore, interlocking brick molded bodies made by press-molding sludge incineration ash have inorganic components similar to conventional bricks and tiles, and have a similar appearance to ordinary bricks.
When this molded body was subjected to the cooling step, the obtained fired body had some defects such as partial cracks, damage, or cracks, and low bending strength.
本発明者らは、前記原因について鋭意検討した結果、汚
泥焼却灰からなるブレス戊形体（インターロッキングレ
ンガ）では、熱灼減量が６００℃で１％前後であり、か
つ、焼成体は、極めて緻密な組織となることが判明した
。すなわち、焼成後の冷却時、焼成体内外の冷却速度の
差に基づく熱応力差を発生し、その結果、部分的な割れ
、破損あるいは亀裂さらには曲げ強度の低下を来すもの
であるとの知見を得た。As a result of intensive investigation into the above-mentioned causes, the inventors of the present invention found that in the case of a brace block (interlocking brick) made of sludge incineration ash, the loss by burning is around 1% at 600°C, and the fired body is extremely dense. It turned out to be an organization. In other words, during cooling after firing, a difference in thermal stress occurs due to the difference in cooling rate inside and outside the fired body, which results in partial cracking, damage, or cracks, as well as a decrease in bending strength. I gained knowledge.
本発明はこの知見にもとづいてなされたものである。The present invention has been made based on this knowledge.
（課題を解決するための手段）
本発明は、汚泥焼却灰からなるインターロッキングレン
ガ用プレス成形体を焼成するに際し、焼成温度から７０
０℃までの冷却速度を、１００〜２５０℃／ｈに制御す
ることを特徴とする汚泥焼却灰からなるインターロッキ
ングレンガの焼成時における冷却方法である。(Means for Solving the Problems) The present invention provides a method for firing a press molded body for interlocking bricks made of sludge incineration ash.
This is a cooling method during firing of interlocking bricks made of sludge incineration ash, characterized by controlling the cooling rate to 0°C at 100 to 250°C/h.
（実施例） つぎに、本発明方法を第１図にしたがい説明する。(Example) Next, the method of the present invention will be explained with reference to FIG.
第１図は、本発明にかかる冷却方法を示す冷却温度カー
ブを示す。FIG. 1 shows a cooling temperature curve showing the cooling method according to the present invention.
使用する下水汚泥焼却灰の組成と粒度は、たとえば、表
１の通りである。The composition and particle size of the sewage sludge incineration ash used are shown in Table 1, for example.
この焼却灰をプレスにて面圧１ 、 Ｑ ｔ ／ｃｍ’
で所定形状に底形し、この成形体を連続式焼成炉に装入
し、約１０５０℃で焼成する。なお、前記面圧は被処理
材である焼却灰の組成あるいは粒度分布により０．３ｔ
／ｃｍ”〜２．Ｏｔ／ａｍ”の範囲で行うものであり、
焼成温度も同様に１０００℃〜１４００℃の範囲で焼成
するものである。This incinerated ash is pressed to a surface pressure of 1, Q t /cm'
The bottom of the molded body is shaped into a predetermined shape, and the molded body is charged into a continuous firing furnace and fired at about 1050°C. Note that the above-mentioned surface pressure is 0.3t depending on the composition or particle size distribution of the incinerated ash that is the material to be treated.
/cm” to 2.0t/am”,
The firing temperature is also within the range of 1000°C to 1400°C.
その後、７００℃まで約２００℃／ｈの速度で冷却し、
その後急冷し、約６時間で２００Ｘ１００Ｘ６０ｍｍの
インターロッキングレンガを得た。After that, it was cooled to 700°C at a rate of about 200°C/h,
Thereafter, it was rapidly cooled, and an interlocking brick of 200 x 100 x 60 mm was obtained in about 6 hours.
このインターロッキングレンガは、表２に示すように市
販のインター口・ノキングレンガに比較してすべての項
目ですぐれたものであった。As shown in Table 2, this interlocking brick was superior in all items compared to commercially available interlocking bricks.
（以 下 余 白） 表１゜ 焼却灰の組成と粒度分布 表２ なお、冷却速度を１００℃／ｈ、１５０℃／ｈ。(Hereafter, extra white) Table 1゜ Composition and particle size distribution of incineration ash Table 2 Note that the cooling rate was 100°C/h and 150°C/h.
２５０℃／ｈおよび３００℃／ｈで処理したところ、こ
のインターロッキングレンガの曲げ強さと冷却速度の関
係は第２図に示すようになった。When treated at 250° C./h and 300° C./h, the relationship between the bending strength and cooling rate of this interlocking brick was shown in FIG. 2.
前記冷却速度は熱応力差の軽減という観点から遅い方が
好ましいが、１００℃／ｈ未満では、聞げ強度の向上が
みられず、冷却サイクルか長く生産性が悪く、かつ、炉
長が長くなるので実用的でない。It is preferable that the cooling rate is slow from the viewpoint of reducing the difference in thermal stress, but if the cooling rate is less than 100°C/h, there will be no improvement in the strength, the cooling cycle will be long, the productivity will be poor, and the furnace length will be long. Therefore, it is not practical.
一方、２５０℃／ｈを越えると、曲げ強度が低過ぎ、ま
た、割れ、破損、亀裂が発生しやすく不適当である。On the other hand, if it exceeds 250° C./h, the bending strength will be too low and cracks, breaks, and cracks will easily occur, which is inappropriate.
したがって、前記冷却速度は１００〜２５０℃／ｈが最
適である。Therefore, the optimum cooling rate is 100 to 250°C/h.
さらに、前記冷却温度を７００℃としたのは、実験結果
によれば焼成温度から７００℃まで１００〜２５０℃／
ｈの冷却速度で冷却した後であれば、急冷しても冷却割
れ等が生ヒないからである。Furthermore, the reason for setting the cooling temperature to 700°C is that according to the experimental results, the cooling temperature is 100 to 250°C from the firing temperature to 700°C.
This is because after cooling at a cooling rate of h, cooling cracks and the like will not occur even if the material is rapidly cooled.
したがって、前記冷却後、急冷することによりン＞ｔｎ
ル（曲九輌うｂ欠球 ｊ真市を廿） ｈ ＋Ｌ尤
、Ｃ２７賎Ｉｌシすることができる。Therefore, by rapidly cooling after the cooling, n>tn
Le (song nine, b missed ball, j true city) h +L, C27 賎Ilshi can be played.
このようにすると、焼成炉も大型化せず、生産性の向上
、製品のコストを低減することができる。In this way, the firing furnace does not need to be enlarged, and productivity can be improved and product costs can be reduced.
（発明の効果）
以上の説明で明らかなように、本発明は汚泥焼却灰から
なるインターロッキングレンガ用プレス成形体を焼成す
るに際し、焼成温度から７００℃までの冷却速度を、１
００〜２５０℃／ｈに制御することにより、部分的な割
れ、破揖あるいは亀裂のない、しかも曲げ強度が高いイ
ンター口、キングレンガを得ることができる。(Effects of the Invention) As is clear from the above description, the present invention improves the cooling rate from the firing temperature to 700°C by 1 when firing a press molded body for interlocking bricks made of sludge incineration ash.
By controlling the temperature at 00 to 250° C./h, it is possible to obtain interface and king bricks that are free from partial cracks, ruptures, or cracks and have high bending strength.
第１図は本発明方広に適用する冷却温度カーブ、第２図
は冷却温度勾配と曲げ強度との関係を示すカーブである
。
特 許 出 願 人 中外炉工業株式会社ばか２名
代 理 人 弁理士 青い 葆 はか１名を
第
図FIG. 1 is a cooling temperature curve widely applied to the present invention, and FIG. 2 is a curve showing the relationship between cooling temperature gradient and bending strength. Patent applicant: Chugai Roko Kogyo Co., Ltd., two representatives, patent attorney, and one patent attorney.
Claims (1)
プレス成形体を焼成するに際し、１０００〜１４００℃
で焼成したのち７００℃までの冷却速度を、１００〜２
５０℃／ｈに制御することを特徴とする汚泥焼却灰から
なるインターロッキングレンガの焼成時における冷却方
法。(1) When firing a press molded body for interlocking bricks made of sludge incineration ash, the temperature is 1000 to 1400°C.
After firing, the cooling rate to 700°C was
A cooling method during firing of interlocking bricks made of sludge incineration ash, characterized by controlling the temperature to 50°C/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1167687A JP2730982B2 (en) | 1989-06-29 | 1989-06-29 | Cooling method during firing of interlocking brick made of sludge incineration ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1167687A JP2730982B2 (en) | 1989-06-29 | 1989-06-29 | Cooling method during firing of interlocking brick made of sludge incineration ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0333050A true JPH0333050A (en) | 1991-02-13 |
| JP2730982B2 JP2730982B2 (en) | 1998-03-25 |
Family
ID=15854369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1167687A Expired - Fee Related JP2730982B2 (en) | 1989-06-29 | 1989-06-29 | Cooling method during firing of interlocking brick made of sludge incineration ash |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730982B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256040A (en) * | 2018-03-12 | 2019-09-20 | 滨海金尼环保科技有限公司 | A kind of technique using industrial residue sludge production construction material standard brick |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56104776A (en) * | 1979-06-16 | 1981-08-20 | Baansutoon Kk | Manufacture of material chiefly for public work and construction from raw material of sewage sludge and soft stone powder |
-
1989
- 1989-06-29 JP JP1167687A patent/JP2730982B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56104776A (en) * | 1979-06-16 | 1981-08-20 | Baansutoon Kk | Manufacture of material chiefly for public work and construction from raw material of sewage sludge and soft stone powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256040A (en) * | 2018-03-12 | 2019-09-20 | 滨海金尼环保科技有限公司 | A kind of technique using industrial residue sludge production construction material standard brick |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2730982B2 (en) | 1998-03-25 |
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