JP2002265258A - Lining refractory for flue - Google Patents

Lining refractory for flue

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Publication number
JP2002265258A
JP2002265258A JP2001065419A JP2001065419A JP2002265258A JP 2002265258 A JP2002265258 A JP 2002265258A JP 2001065419 A JP2001065419 A JP 2001065419A JP 2001065419 A JP2001065419 A JP 2001065419A JP 2002265258 A JP2002265258 A JP 2002265258A
Authority
JP
Japan
Prior art keywords
flue
refractory
content
sic
sio
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
Application number
JP2001065419A
Other languages
Japanese (ja)
Inventor
Hiroaki Ishida
博章 石田
Michitake Fujiwara
道丈 藤原
Koji Nakayama
孝司 中山
Mitsuhiko Sakaguchi
光彦 阪口
Hiroyuki Ikemiya
洋行 池宮
Hirotaka Sato
弘孝 佐藤
Tokiharu Kodama
時春 児玉
Noboru Furukawa
昇 古川
Takahiro Yano
貴博 矢野
Katsuyuki Norimatsu
克之 則松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP2001065419A priority Critical patent/JP2002265258A/en
Publication of JP2002265258A publication Critical patent/JP2002265258A/en
Pending legal-status Critical Current

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  • Chimneys And Flues (AREA)
  • Ceramic Products (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a lining refractory for a flue with which the sticking amount of fly ash contained in an exhaust gas is reduced without controlling temperature. SOLUTION: The lining refractory is used for the flue connecting an incineration furnace for waste materials with exhaust gas treating facilites, and the contents of an SiC component and an SiO2 component contained in the lining refractory satisfy the following formula: (SiO2 )<=0.068×(SiC)+2.2, wherein (SiO2 ) and (SiC) stand for the content (mass %) of silica and the content (mass %) of silicon carbide, respectively.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、廃棄物の焼却炉と
排ガス処理設備とを連結する煙道の内張り耐火物に関
し、特に排ガスに含有される飛灰の付着を軽減できる煙
道用内張り耐火物に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory lining for a flue connecting a waste incinerator and an exhaust gas treatment facility, and more particularly to a lining refractory for a flue capable of reducing the adhesion of fly ash contained in exhaust gas. About things.

【0002】[0002]

【従来の技術】廃棄物の焼却炉内の温度および流速条件
によっては、排ガス中に含有される飛散灰や低沸点のガ
ス状物質(以下、「溶融飛灰」または単に「飛灰」とも
いう)が廃棄物の焼却炉と排ガス処理設備とを連結する
煙道の内壁に付着・堆積し、ついには、煙道が閉塞する
という事態にまで至ることがある。
2. Description of the Related Art Fly ash and low-boiling gaseous substances (hereinafter, also referred to as "melted fly ash" or simply "fly ash") contained in exhaust gas depending on the temperature and flow rate conditions in waste incinerators. ) Adheres and accumulates on the inner wall of the flue connecting the waste incinerator and the exhaust gas treatment equipment, and eventually the flue may be blocked.

【0003】例えば、特開平9−72518号公報に
は、廃棄物の焼却炉である溶融炉の排ガス中に含まれる
溶融飛灰が、廃棄物の焼却炉と排ガス処理設備とを連結
する煙道内で液化を始める前に、冷却ガスを吹き付けて
煙道の内壁への溶融飛灰の付着防止を図る方法や、排ガ
スの流れが変わる煙道内の部位に、熱伝導率の大きな耐
火物を内張りして耐火物表面温度を300℃以下とする
ことで、溶融飛灰が煙道内に付着するのを抑制する方法
等が提案されている。
For example, Japanese Unexamined Patent Publication No. 9-72518 discloses that molten fly ash contained in the exhaust gas of a melting furnace, which is a waste incinerator, is used in a flue connecting a waste incinerator and an exhaust gas treatment facility. Before starting liquefaction, a method of spraying cooling gas to prevent the adhesion of molten fly ash to the inner wall of the flue, or refractory with high thermal conductivity is lined in the area of the flue where the flow of exhaust gas changes A method has been proposed in which the surface temperature of the refractory is controlled to 300 ° C. or lower to prevent the molten fly ash from adhering to the flue.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、このよ
うに冷却ガスを吹き付ける方法や耐火物表面温度を30
0℃以下にする方法は、煙道からのヒートロスが大幅に
増加するという不利益が生じること、ならびに排ガス温
度を所定温度の範囲内に維持することが困難となり、ダ
イオキシンの再合成が生じる可能性がある。
However, the method of spraying the cooling gas and the temperature of the refractory surface are set to 30 or less.
The method of lowering the temperature to 0 ° C. or lower has a disadvantage that heat loss from the flue is greatly increased, and it is difficult to maintain an exhaust gas temperature within a predetermined temperature range, which may cause a resynthesis of dioxin. There is.

【0005】本発明の目的は、このような温度調整によ
らないで排ガスに含有される飛灰の付着を軽減できる煙
道用内張り耐火物を提供することにある。
An object of the present invention is to provide a refractory lining for a flue, which can reduce the adhesion of fly ash contained in exhaust gas without using such temperature control.

【0006】[0006]

【課題を解決するための手段】本発明者らは、試験設備
の煙道に付着した飛灰を採取し、煙道用内張り耐火物の
組成を種々変えて採取飛灰と所定組成の耐火物との付着
性について評価した。
Means for Solving the Problems The present inventors sample fly ash adhering to the flue of a test facility, and variously change the composition of the refractory lining for the flue to obtain the collected fly ash and the refractory having a predetermined composition. Was evaluated for adhesion.

【0007】表1に採取した飛灰の代表成分の含有率を
示す
Table 1 shows the content of representative components of the fly ash collected.

【0008】[0008]

【表1】 [Table 1]

【0009】表2に評価試験に使用した煙道用内張り耐
火物(サンプル:A〜Hの8種類)の主要成分の含有率
を示す。
Table 2 shows the content of the main components of the flue lining refractories (samples: A to H) used in the evaluation test.

【0010】[0010]

【表2】 [Table 2]

【0011】以下の(1)〜(3)に評価試験の方法を
示す。図1は、本評価試験に用いたサンプル耐火物断面
の概略を示す図である。 (1)表2に示すA〜Hのサンプル耐火物を同一サイズ
(60×60×120mm)とし、図1に示すように、角度60
度のくさび形に分割加工し、この分割されたサンプル耐
火物上部分1とサンプル耐火物下部分2とを所定間隔
(4mm)に置き、この所定間隔(4mm)内に、採取した
飛灰3を10g挟み1100℃に加熱する。
The following (1) to (3) show evaluation test methods. FIG. 1 is a view schematically showing a cross section of the sample refractory used in the present evaluation test. (1) The sample refractories A to H shown in Table 2 were of the same size (60 × 60 × 120 mm), and as shown in FIG.
The sample refractory upper portion 1 and the sample refractory lower portion 2 are placed at a predetermined interval (4 mm) at a predetermined interval (4 mm), and the collected fly ash 3 is placed within the predetermined interval (4 mm). And heated to 1100 ° C.

【0012】(2)常温まで冷却後、油圧式の圧縮試験
機にて、図1に示すように上方から加圧して、A〜Hの
耐火物のすべり開始のせん断力を測定する。常温まで冷
却後、油圧式の圧縮試験機にてA〜Hの耐火物のすべり
開始のせん断力を測定する。ここで、すべり開始のせん
断力は、各サンプル耐火物と飛灰との付着面の強度とみ
なすことができる。すなわち、すべり開始のせん断力が
小さい程、付着面の強度が小さいので付着性が低い、す
なわち濡れ性が低いと評価できる。一方、すべり開始の
せん断力が大きい程、付着面の強度が大きいので付着性
が高い、すなわち濡れ性が高いと評価できる。
(2) After cooling to room temperature, a hydraulic compression tester is used to apply pressure from above as shown in FIG. 1 to measure the shearing force of the refractories A to H at the start of sliding. After cooling to room temperature, the shearing force at the start of sliding of the refractories A to H is measured by a hydraulic compression tester. Here, the shearing force at the start of slip can be regarded as the strength of the adhesion surface between each sample refractory and fly ash. In other words, the smaller the shearing force at the start of sliding, the lower the strength of the adhesion surface, and thus the lower the adhesion, that is, the lower the wettability. On the other hand, the greater the shearing force at the start of sliding, the greater the strength of the adhered surface, and thus the higher the adhesiveness, ie, the higher the wettability.

【0013】(3)表3に各サンプル耐火物を使用した
ときのすべり開始のせん断力の値を示す。
(3) Table 3 shows the values of the shearing force at the start of sliding when each sample refractory is used.

【0014】[0014]

【表3】 [Table 3]

【0015】表2に示す主要成分の含有率と表3との試
験結果を基に以下の知見が得られる。 (A)各耐火物サンプルの内、SiO2含有量が3.2
%以下であるB、C、DおよびFサンプルは表3に示す
せん断力が9.8MPa以下であり付着性が低い。
Based on the contents of the main components shown in Table 2 and the test results in Table 3, the following findings can be obtained. (A) Among the refractory samples, the SiO 2 content was 3.2.
%, B, C, D and F samples have a shear force shown in Table 3 of 9.8 MPa or less and low adhesion.

【0016】(B)また、各耐火物サンプルの内SiC
含有量が高くなると、表3に示すせん断力が低下傾向に
ある。 (C)表3に示すせん断力の範囲をグループ化(◆:1
0MPa超、▲:5〜10MPa、●:5MPa未満)
し、このグループをパラメータとしてSiC含有量とS
iO2含有量との関係を求めた。
(B) In addition, of each refractory sample, SiC
When the content increases, the shearing force shown in Table 3 tends to decrease. (C) The range of the shear force shown in Table 3 is grouped (◆: 1).
0MPa, ▲: 5-10MPa, ●: less than 5MPa)
Using this group as a parameter, the SiC content and S
The relationship with the iO2 content was determined.

【0017】図2は、せん断力をパラメータとしたSi
C含有量とSiO2含有量との関係を示すグラフであ
る。同図に示すように、縦軸切片2.2、傾き0.06
8の直線以下の範囲のSiO2含有量であれば、せん断
力を10MPa以下に低減できる。なお、せん断力を1
0MPa以下に低減できると、煙道内壁に付着していた
飛灰が、一般的な排ガス流速10m/sec以下の排ガスに
随伴されて除去され得るので、飛灰の付着量を低減でき
る。
FIG. 2 shows the relationship between the shear force and the Si
Is a graph showing the relationship between the C content and the SiO 2 content. As shown in the figure, the vertical axis intercept is 2.2 and the slope is 0.06.
If the SiO 2 content is within the range below the straight line of 8, the shearing force can be reduced to 10 MPa or less. Note that the shear force is 1
If the pressure can be reduced to 0 MPa or less, fly ash adhering to the flue inner wall can be removed along with the exhaust gas having a general exhaust gas flow rate of 10 m / sec or less, so that the amount of fly ash attached can be reduced.

【0018】本発明は、以上の知見に基づいてなされた
もので、その要旨は、下記のとおりである。Al23
SiO2とを含有する耐火物にSiCを配合させた耐火
物であって、該耐火物中のSiC成分とSiO2成分と
が下記(1)式の関係を満足することを特徴とする廃棄
物の焼却炉と排ガス処理設備とを連結する煙道用内張り
耐火物。
The present invention has been made based on the above findings, and the gist thereof is as follows. A refractory obtained by mixing SiC with a refractory containing Al 2 O 3 and SiO 2 , wherein the SiC component and the SiO 2 component in the refractory satisfy the relationship of the following formula (1). A refractory lining for flue, which connects a waste incinerator and an exhaust gas treatment facility.

【0019】 (SiO2)≦ 0.068×(SiC)+2.2 ・・・・・(1) ここで、(SiO2)および(SiC)は内張り耐火物
中のそれぞれの含有率(質量%)を表す。
(SiO 2 ) ≦ 0.068 × (SiC) +2.2 (1) Here, (SiO 2 ) and (SiC) represent the respective contents (% by mass) in the lining refractory. Represent.

【0020】[0020]

【発明の実施の形態】煙道用内張り耐火物中の主要成分
の作用について先ず説明する。SiC:飛灰に対する付
着性(濡れ性)の低減に効果を発揮する成分である。S
iO2:高温雰囲気下では飛灰と反応し低融点化合物を
つくり易いので、付着性(濡れ性)を増大させる成分で
ある。Al23:SiCとSiO2両者の中間の特性を
有する成分である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the operation of the main components in the refractory lining for flue will be described. SiC: a component that is effective in reducing the adhesion (wetting) to fly ash. S
iO 2 : a component that increases adhesion (wettability) because it easily reacts with fly ash to form a low melting point compound in a high temperature atmosphere. Al 2 O 3 : a component having characteristics intermediate between those of SiC and SiO 2 .

【0021】次に、上記各成分の望ましい含有量につい
て説明する。SiCおよびSiO2は前記(1)式を満
足する含有量であることが必要であるが、SiC含有量
は10〜100質量%(以下、単に%で質量%を表す)
であることが望ましい。その理由は10%未満では、S
iCが有する飛灰に対する付着性低減の効果を発揮でき
ないおそれがあるからである。SiO2含有量は約1以
上9%以下であることが望ましい。その理由は9%超で
は、SiO2は高温雰囲気下で飛灰と反応し低融点化合
物をつくり、付着を促進させるおそれがあるからであ
る。このSiO2含有量の下限約1%の意味は、耐火物
製造時に不可避的に混入する量である。Al23含有量
自体に制約は無いが、SiC含有量の10%以上が望ま
しく、かつSiO2含有量は少ないことが望ましいこと
から、Al23含有量は約1%以上90%未満が望まし
い。このAl23含有量の下限約1%の意味は、耐火物
製造時に不可避的に混入する量である。
Next, the desirable contents of the above components will be described. The content of SiC and SiO 2 needs to satisfy the above formula (1), but the content of SiC is 10 to 100% by mass (hereinafter, simply referred to as% by mass).
It is desirable that The reason is that if less than 10%, S
This is because there is a possibility that the effect of reducing the adhesion to fly ash of iC may not be exhibited. It is desirable that the SiO 2 content be about 1 to 9%. The reason is that if it exceeds 9%, SiO 2 may react with fly ash in a high-temperature atmosphere to form a low-melting-point compound and promote adhesion. The meaning of the lower limit of about 1% of the SiO 2 content is the amount that is inevitably mixed during the production of refractories. There is no limitation on the Al 2 O 3 content itself, but the content of Al 2 O 3 is preferably about 1% or more and less than 90% since the content of SiC is desirably 10% or more and the content of SiO 2 is desirably small. Is desirable. The meaning of the lower limit of about 1% of the Al 2 O 3 content is the amount that is inevitably mixed during the production of refractories.

【0022】本発明の煙道用内張り耐火物は、廃棄物の
焼却炉と排ガス処理設備とを連結する煙道で使用される
が、廃棄物の焼却炉としては、高温で処理するガス化溶
融炉あるいは灰溶融炉が好ましい。
The refractory lining for flue of the present invention is used in a flue for connecting a waste incinerator and an exhaust gas treatment facility. Furnaces or ash melting furnaces are preferred.

【0023】また、廃棄物の焼却炉と排ガス処理設備と
を連結する煙道の形態は、様々の形態があるが、円形ダ
クトが好ましい。図3は、廃棄物のガス化溶融炉と冷却
塔とを連結する煙道の接続形態の一例を示す概念図であ
る。
Further, there are various forms of a flue for connecting the waste incinerator and the exhaust gas treatment equipment, but a circular duct is preferable. FIG. 3 is a conceptual diagram showing an example of a connection configuration of a flue that connects a waste gasification / melting furnace and a cooling tower.

【0024】同図に示すように、ガス化溶融炉4の上端
にあるガス排出口5と冷却塔6の上端に位置する排ガス
導入口7とを接続する配管が煙道8である。
As shown in FIG. 1, a pipe connecting the gas outlet 5 at the upper end of the gasification and melting furnace 4 and the exhaust gas inlet 7 at the upper end of the cooling tower 6 is a flue 8.

【0025】[0025]

【実施例】日量20トンの一般廃棄物を処理できるガス化
溶融試験炉で、以下の試験を実施した。このガス化溶融
試験炉に連結された煙道は、外径800mm、内径450
mmであり、内張りの耐火物の厚みは150mmであるもの
を使用した。雰囲気ガス温度は、煙道入り側で1180
℃、煙道出側で1020℃であり、平均は1100℃で
あった。
EXAMPLES The following tests were carried out in a gasification and melting test furnace capable of treating 20 tons / day of general waste. The flue connected to this gasification and melting test furnace has an outer diameter of 800 mm and an inner diameter of 450 mm.
mm, and the thickness of the refractory lining was 150 mm. The ambient gas temperature was 1180 at the entrance to the stack.
° C and 1020 ° C on the exit side of the stack, and the average was 1100 ° C.

【0026】本試験では、長さ1000mmの各種耐火物
サンプルを全周にわたって煙道に内張りし、1ヶ月間連
続試験を実施した。試験後、この煙道を冷却して煙道に
付着していた飛灰の厚みを測定した。
In this test, various refractory samples each having a length of 1000 mm were lined with a flue over the entire circumference, and a continuous test was carried out for one month. After the test, the flue was cooled and the thickness of fly ash adhering to the flue was measured.

【0027】表4に使用した耐火物サンプルa〜eの成
分含有量と飛灰の厚みとの関係およびその評価結果を示
す。
Table 4 shows the relationship between the component contents of the refractory samples a to e used and the thickness of fly ash and the evaluation results.

【0028】[0028]

【表4】 [Table 4]

【0029】なお、評価欄の記号は煙道内の付着量が以
下の通りであることを示す。 ◎:付着厚みが40mm未満で付着がほとんどなく極め
て良好である。 ○:付着厚みが40mm以上120mm未満であり操業
に支障がない。 ×:付着厚みが120mm以上であり操業に支障があ
る。
The symbols in the evaluation column indicate that the amount of adhesion in the flue is as follows. ◎: Adhesion thickness is less than 40 mm, there is almost no adhesion and extremely good. :: The adhesion thickness is 40 mm or more and less than 120 mm, and there is no hindrance to the operation. X: The adhesion thickness is 120 mm or more, which hinders the operation.

【0030】また、「SiO2含有量計算値」欄は、下
記(A)式からSiC成分含有量から求めた値であり、
「計算式との関係」欄は、実際のSiO2成分含有量と
SiO2含有量計算値との比較を行い、実際のSiO2
分含有量がSiO2含有量計算値以下であれば○、実際
のSiO2成分含有量がSiO2含有量計算値を超えた含
有量であれば×とした。
The column of “calculated value of SiO 2 content” is a value obtained from the content of the SiC component from the following equation (A).
Column "relationship between the equation" performs comparison between the actual SiO 2 component content and SiO 2 content calculated values, the actual SiO 2 component content is not more than the content of SiO 2 Calculated ○, If the actual content of the SiO 2 component exceeded the calculated value of the SiO 2 content, it was evaluated as x.

【0031】 (SiO2)= 0.068×(SiC)+2.2 ・・・・・(A) ここで、(SiO2)および(SiC)は内張り耐火物
中のそれぞれの含有率(質量%)を表す。
(SiO 2 ) = 0.068 × (SiC) +2.2 (A) Here, (SiO 2 ) and (SiC) represent the respective contents (% by mass) in the lining refractory. Represent.

【0032】表4に示すように、「計算式との関係」欄
が○であれば付着量評価は○または◎の評価が得られ
た。
As shown in Table 4, if the "Relationship with calculation formula" column was "O", the evaluation of the amount of adhesion was "O" or "A".

【0033】[0033]

【発明の効果】本発明により、排ガスに含有される飛灰
の付着を軽減できる煙道用内張り耐火物を提供すること
ができる。
According to the present invention, it is possible to provide a flue lining refractory which can reduce the adhesion of fly ash contained in exhaust gas.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本評価試験に用いたサンプル耐火物断面の概略
を示す図である。
FIG. 1 is a diagram schematically showing a cross section of a sample refractory used in the present evaluation test.

【図2】せん断力をパラメータとしたSiC含有量とS
iO2含有量との関係を示すグラフである。
FIG. 2 shows SiC content and S with shear force as a parameter.
iO is a graph showing the relationship between the 2 content.

【図3】廃棄物のガス化溶融炉と冷却塔とを連結する煙
道の接続形態の一例を示す概念図である
FIG. 3 is a conceptual diagram showing an example of a connection configuration of a flue for connecting a waste gasification / melting furnace and a cooling tower.

【符号の説明】[Explanation of symbols]

1:サンプル耐火物上部分、 2:サンプル耐火物下部分、 3:飛灰、 4:ガス化溶融炉、 5:ガス排出口、 6:冷却塔、 7:排ガス導入口、 8:煙道。 1: Upper part of sample refractory, 2: Lower part of sample refractory, 3: Fly ash, 4: Gasification and melting furnace, 5: Gas outlet, 6: Cooling tower, 7: Exhaust gas inlet, 8: Flue.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中山 孝司 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 阪口 光彦 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 池宮 洋行 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 佐藤 弘孝 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 児玉 時春 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 古川 昇 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 矢野 貴博 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 則松 克之 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 Fターム(参考) 3K070 BA01 BA15 4G001 BA03 BA04 BA22 BB03 BB04 BB22 BD07 4G030 AA36 AA37 AA47 BA25 4K051 AA03 BE00  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takashi Nakayama 4-33, Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Inside Sumitomo Metal Industries, Ltd. (72) Mitsuhiko Sakaguchi 4-5-Kitahama, Chuo-ku, Osaka City, Osaka Prefecture No. 33 Sumitomo Metal Industries, Ltd. (72) Inventor Hiroyuki Ikemiya 4-33 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Inside Sumitomo Metal Industries Co., Ltd. (72) Hirotaka Sato, Kitahama 4, Chuo-ku, Osaka City, Osaka Prefecture No.5-33, Sumitomo Metal Industries, Ltd. (72) Inventor Tokiharu Kodama 4-5-33, Kitahama, Chuo-ku, Osaka-shi, Osaka Prefecture Sumitomo Metal Industries, Ltd. (72) Inventor Noboru Furukawa, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd. (72) Takahiro Yano 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka-shi Sumitomo Metal Industries Co., Ltd. (72) Inventor Katsuyuki Norimatsu 4-5-33 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture F-term in Sumitomo Metal Industries Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 Al23とSiO2とを含有する耐火物
にSiCを配合させた耐火物であって、該耐火物中のS
iC成分とSiO2成分とが下記(1)式の関係を満足
することを特徴とする廃棄物の焼却炉と排ガス処理設備
とを連結する煙道用内張り耐火物。 (SiO2)≦ 0.068×(SiC)+2.2 ・・・・・(1) ここで、(SiO2)および(SiC)は内張り耐火物
中のそれぞれの含有率(質量%)を表す。
1. A refractory obtained by mixing SiC with a refractory containing Al 2 O 3 and SiO 2 , wherein S
A flue lining refractory for connecting a waste incinerator and an exhaust gas treatment facility, wherein the iC component and the SiO 2 component satisfy the relationship of the following formula (1). (SiO 2 ) ≦ 0.068 × (SiC) +2.2 (1) Here, (SiO 2 ) and (SiC) represent the respective contents (% by mass) in the lining refractory.
JP2001065419A 2001-03-08 2001-03-08 Lining refractory for flue Pending JP2002265258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001065419A JP2002265258A (en) 2001-03-08 2001-03-08 Lining refractory for flue

Publications (1)

Publication Number Publication Date
JP2002265258A true JP2002265258A (en) 2002-09-18

Family

ID=18924078

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2002265258A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113248267A (en) * 2021-03-29 2021-08-13 宜兴市海科窑炉工程有限公司 High-strength silicon carbide composite refractory brick for garbage incinerator and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113248267A (en) * 2021-03-29 2021-08-13 宜兴市海科窑炉工程有限公司 High-strength silicon carbide composite refractory brick for garbage incinerator and preparation method thereof

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