JP3917688B2

JP3917688B2 - Gitter brick with bypass, stacking method and brick stacking repair method for hot stove regenerator

Info

Publication number: JP3917688B2
Application number: JP23066796A
Authority: JP
Inventors: 昌男藤田; 力生小野; 完二相沢; 良親佐藤; 年男上谷; 慎一益本; 正夫南部; 正義中島; 敬治磯崎
Original assignee: JFE Steel Corp
Current assignee: JFE Steel Corp
Priority date: 1996-01-30
Filing date: 1996-08-30
Publication date: 2007-05-23
Anticipated expiration: 2016-08-30
Also published as: KR19980018012A; CN1059468C; KR100233695B1; CN1182181A; JPH09269193A

Description

【０００１】
【発明の属する技術分野】
本発明は、熱風炉の蓄熱室内部に積み重ねられ、高温ガスと冷風との熱交換の媒体となるギッター煉瓦、その積み重ね方法及び熱風炉蓄熱室の煉瓦積み補修方法に関する。
【０００２】
【従来の技術】
高炉操業では、高炉に装入したコークスを燃焼させるため、多量の空気が必要である。この空気は、燃焼室１と蓄熱室２とからなる熱風炉３（図６参照）を用い、燃料ガスの燃焼、燃焼熱の煉瓦への蓄熱、蓄熱した煉瓦と新しい冷風との熱交換等の作用を経て、７００〜１３００℃に予熱されてから、高炉に連続的に送られる。この連続送風を行うため、熱風炉３は、通常１基の高炉に対し３〜４基が設置され、適宜切り換えて使用するようになっている。
【０００３】
ところで、上記燃焼熱を蓄熱するため、蓄熱室２内には所謂ギッターあるいはチェッカー煉瓦４が多段（通常、２５０段程度）に積まれている。そして、各ギッター煉瓦４には、燃焼で得た高温ガスや加熱されるべき空気を通過させるガス流路を形成するため、上下に向けて貫通孔５と溝（以下、上下溝６という）が多数設けられている。ちなみ、後述する６角柱状のギッター煉瓦４（図８参照）は、７個の貫通孔５に加えて、煉瓦側面に沿って１２本の上下溝６が形成されており、この溝６も煉瓦積みした際に、隣接煉瓦の溝６と組み合わさって５個の貫通孔［（断面が１／２円の溝×６個）＋（１／３円の溝×６個）＝５個］となるので、煉瓦一個当たり合計１２個の貫通孔（ガス流路）を有することになる。従って、近年新設された熱風炉３は、蓄熱室１基当たり、上下方向に連通する１１、０００本〜１８、０００本程度の同一径のガス流路が存在している。
【０００４】
しかしながら、上記ガス流路は、永年使用していると、ダスト等の付着成長、局部加熱による煉瓦の一部溶融、異物流入等に起因して、閉塞されるものが出現する。１本のガス流路の途中で閉塞が起きると、その流路全体が蓄熱あるいは熱交換に利用できなくなり、熱風炉３の熱効率に影響を与える。多くの高炉改修時に、熱風炉３においてガス流路の貫通率が調査されている。その結果を図７に数値で示すが、該貫通率は、蓄熱室断面全体の平均で７０．３％であり、そして周囲の貫通率が中央部より低いようである。また、ガス流路の閉塞位置を調査したところ、この閉塞は、蓄熱室２の上半分に用いる珪石質煉瓦で起きることが多く、下半分の高アルミナ質や粘土質煉瓦では少ないことも明らかになっている。
【０００５】
一方、高炉は、以前には、１０年にほぼ１回のペースで改修が行われていたが、熱風炉３はそれより寿命が永く２０年程度もつので、高炉が改修されても、熱風炉３は元のままで再使用されることが多かった。その際、上記したような貫通率の低下があると、非常に熱効率の悪い熱風炉３で改修後の高炉操業を行うことになる。また、近年の高炉は、１５年以上も継続して操業されるものがあるので、それに伴い熱風炉３の一層の寿命延長や熱効率の改善が必要になっている。
【０００６】
そこで、実開平５−７７２４２号公報は、図８に示すように、７個の貫通孔５及び１２本の上下溝６で上下方向のガス流路を形成してなる６角柱状のギッター煉瓦において、その上面及び／又は底面の周囲に水平に溝を彫り（以下、水平溝９という）、該水平溝９と前記上下溝６の端部同士を連通させたものを提案した（図８（ｂ）参照）。この水平溝９は、煉瓦を多段に積んだ際には、ガス流れに関しバイパス路として作用するので、このギッター煉瓦を使用すると、前記ガス流路の一部に閉塞が生じても、閉塞部を迂回してガスが流れ、そのガス流路の完全閉塞が回避できるようになる。
【０００７】
また、実開平５−９６０４６号公報は、図９及び１０に示すように、上面及び／又は底面の周囲ではなく、面内に水平溝９を多数彫ったり、あるいは本体そのものに多数の水平貫通孔１０を複雑（例えば、放射状）に設けて、バイパス路を形成した６角柱状のギッター煉瓦を開示した。
上記実開平５−７７２４２号公報記載のギッター煉瓦は、多段に積まれた際に上下の煉瓦を拘束する環状のダボ１１（貫通孔端部にリング状の突起を設ける）及びダボ孔１２（貫通孔端部をリング状の段付構造とする）を、中心貫通孔を基準に１２０°の位置にある３本の同一貫通孔５の上下端に設けている。しかしながら、このダボ１１がかえって邪魔になり、水平溝と連通させられないため煉瓦の重ね方が制約されてしまい、自由な重ね合わせができないという欠点がある。その結果、前記バイパス路で水平方向に連通しないガス流路が一部残ってしまう。しかも、かかるガス流路（ダボのあるガス流路）は、全体の２５％に相当し、そこで部分的な閉塞が起きると、該ガス流路にはガスが流れなくなるので、実開平５−７７２４２号公報記載の煉瓦を使用しても、熱効率の向上には限界があった。
【０００８】
一方、実開平５−９６０４６号公報記載のギッター煉瓦は、すべてのガス流路が互いに連通するようにバイパス路を形成することは可能である。しかし、そのようにバイパス路を形成すると、煉瓦の構造が複雑になり、積み重ねに際し煉瓦の強度低下が問題になる。さらに、煉瓦の製造工程も複雑になり、製作費用の増加が避けられない。
【０００９】
【発明が解決しようとする課題】
本発明の目的は、かかる事情に鑑み、熱風炉の熱効率を高水準に維持し、且つ高強度で比較的容易に製造できるバイパス路付きギッター煉瓦及びその積み重ね方を提供すると共に、これらの技術を利用した熱風炉蓄熱室の補修方法をも提供することにある。
【００１０】
【課題を解決するための手段】
発明者は、上記目的を達成するため、従来のバイパス路付きギッター煉瓦の問題点を見直した。その結果、補修も含めて煉瓦を多段に積む際には、ダボ及びダボ孔の配置が、煉瓦強度の向上には、バイパス路の形状が、ガスの通過には、バイパスの深さが、非常に重要であることに気づき、本発明を着想するに至った。
【００１１】
かかる本発明は、六角柱状の煉瓦本体と、その中心を上下に貫通する１本の中心貫通孔、該中心貫通孔を囲み、互いに６０°間隔に設けた６本の貫通孔及び該本体側面に沿い、６角形の各頂点、各頂点間の中心位置に彫られ、隣り合う煉瓦のものと組合わせて貫通孔を形成する多数の上下溝からなるガス流路と、該本体の上下面のいずれかにおいて上記６本の貫通孔端部に設けられ、該本体を積み重ねた際に上下を拘束するダボ及びダボ孔とを備えたギッター煉瓦において、本体の一面側には、上記ダボを、中心貫通孔を基準に互いに１２０°間隔にある３本の貫通孔端部に設け、残り３本の貫通孔の他面側端部に上記ダボ孔を設けると共に、上記ガス流路間を連通させるよう、上記６本の貫通孔のうち、ダボ又はダボ孔が設けられていない端部と、それに近接する３本の上下溝の端部とを連通させて、煉瓦を多段に積んだ際に前記各ガス流路間でバイパス路として作用させる広幅共同溝を本体面上下から切欠いてなることを特徴とするバイパス路付きギッター煉瓦である。
【００１２】
また、本発明は、上記広幅共同溝を本体の一面に３ケ所形成したり、あるいは前記広幅共同溝の深さを、前記ギッター煉瓦高さの３％以上１４％以下の範囲内にしたことを特徴とするバイパス路付きギッター煉瓦である。
さらに、本発明は、熱風炉の蓄熱室に、請求項１〜３いずれか記載のバイパス路を有するギッター煉瓦を積み重ねるに際し、前記煉瓦の側面同士を互いに隙間がないよう接触させて一段を形成し、二段目は、該一段目煉瓦の頂点上に、該二段目煉瓦の中心貫通孔が位置し、且つダボとダボ孔が嵌合するように積み、三段目は、前記一段目煉瓦の残りの頂点の鉛直線上に、三段目煉瓦の中心貫通孔が位置し、ダボとダボ孔が嵌合するように積み、これら三段を１セットの層で繰り返すことを特徴とするバイパス路付きギッター煉瓦の積み重ね方法である。
【００１３】
加えて、本発明は、上記バイパス路を有するギッター煉瓦を多段に積んだ層の他に、バイパス路を有しないギッター煉瓦の層を配置することを特徴とするバイパス路付き煉瓦の積み重ね方法である。
さらに加えて、六角柱状の煉瓦本体と、その中心を上下に貫通する１本の中心貫通孔、該中心貫通孔を囲み、互いに６０°間隔に設けた６本の貫通孔及び該本体側面に沿い、６角形の各頂点、各頂点間の中心位置に彫られ、隣り合う煉瓦のものと組合わせて貫通孔を形成する多数の上下溝からなるガス流路と、該本体の上下面のいずれかにおいて上記６本の貫通孔端部に設けられ、該本体を積み重ねた際に上下を拘束するダボ及びダボ孔とを備えたギッター煉瓦を積んだ熱風炉蓄熱室の煉瓦層を補修するに際して、前記ギッター煉瓦層の間に、本体の一面側には、上記ダボを、中心貫通孔を基準に互いに１２０°間隔にある３本の貫通孔端部に設け、残り３本の貫通孔の他面側端部に上記ダボ孔を設けると共に、上記ガス流路間を連通させるよう、上記６本の貫通孔のうち、ダボ又はダボ孔が設けられていない端部と、それに近接する３本の上下溝の端部とを連通させて、煉瓦を多段に積んだ際に前記各ガス流路間でバイパス路として作用させる広幅共同溝を本体面上下から切欠いてなるバイパス路付きギッター煉瓦を、該バイパス路を有するギッター煉瓦の側面同士を互いに隙間がないよう接触させて一段を形成し、二段目は、該一段目煉瓦の頂点上に、該二段目煉瓦の中心貫通孔が位置し、且つダボとダボ孔が嵌合するように積み、三段目は、前記一段目煉瓦の残りの頂点の鉛直線上に、三段目煉瓦の中心貫通孔が位置し、ダボとダボ孔が嵌合するように積み、これら三段１セットのバイパス路を有するギッター煉瓦の層を少なくとも１セット介在させたり、あるいは上記熱風炉蓄熱室の煉瓦層を、高さ方向で２分して下方層を再使用のために残し、上方層に上記バイパス路付きギッター煉瓦の三段１セットの層を少なくとも１セット積み込むことを特徴とする熱風炉蓄熱室の煉瓦積み補修方法でもある。
【００１４】
本発明では、ギッター煉瓦を上記のような構造にしたので、上下方向へのみ独立してガスを流していた１１、０００〜１８、０００本という多数のガス流路を、わずか３段１セットの積み重ねで、すべてのガス流路が水平方向で連通するようになる。従って、この３段１セットを、ほぼ２５０段ある蓄熱室２の煉瓦層の全部あるいは数セット配置するようにすれば、欠落片等によりガス流路の一部が閉塞されても、ガスはその部分を迂回するので、その閉塞されたガス流路を全面的に無駄にすることがなくなる。その結果、蓄熱室２は、伝熱面積の減少を抑制でき、高い熱効率を維持できるようになる。また、バイパス路は、煉瓦上面に３か所に分け、等間隔離れて形成されるので、比較的容易に製造でき、強度の確保もできる。さらに、上下方向のガス流路と同程度の通気抵抗になるように、バイパスの形状と深さを定めているので、ガスは、バイパス路へ円滑に流れるようになる。加えて、本発明に係るバイパス路付きギッター煉瓦及びその積み重ね方法を蓄熱室の補修に利用すれば、高炉設備の保全に多大なメリット、つまり、経済的及び設備的メリットを与えることになる。
【００１５】
【発明の実施の形態】
まず、図１〜３を参照して、本発明に係るバイパス路付きギッター煉瓦の一実施形態を説明する。なお、図１は、該バイパス路付きギッター煉瓦の斜視図、図２は、図１の平面図、図３は、図２のＡ−Ａ断面図である。
煉瓦本体７は、図１から明らかなように、高さ１５０ｍｍ、一辺の長さ１３６ｍｍの六角柱状であり、上面１５と底面１６との間を貫通する円形断面の貫通孔５が形成されている。この貫通孔５は、上記面の中心に位置する１本の中心貫通孔１３と、該中心貫通孔１３を囲み、互いに６０°の間隔にある６本の貫通孔５とがあり、それぞれ独立して燃焼ガスや空気を上下方向に通過させるガス流路となる。
【００１６】
また、六角柱状の煉瓦本体７の各頂点１８には、該煉瓦本体７の側面１４に沿い上下方向に延びる６本の上下溝６があり、それら上下溝６の断面積はそれぞれ上記貫通孔面積の３分の１となっている。さらに、六角形の各辺の中間位置２１には、断面積が上記貫通孔５の半分になる６本の上下溝６が、上記同様に煉瓦本体７の側面１４に沿い、上下方向に形成されている。これら１２本の上下溝６は、煉瓦積みが行われた際、隣り合う煉瓦の上下溝６と組み合わさって、前記貫通孔５と同一径の孔になり、上下方向のガス流路となる。
【００１７】
加えて、煉瓦本体７の上面１５及び底面１６には、煉瓦積みが行われた際、上下に位置する煉瓦同士を係止するダボ１１及びダボ孔１２が上記６本の貫通孔５のいずれか一方の端部に設けられている。なお、ダボ１１は、リング状の突起であり、ダボ孔１２はその突起を受け入れる断面が円形の凹部である。
ここまでは、前記した従来のバイパス路付きギッター煉瓦とほぼ同じ形状であるが、本発明は、下記の点で従来のものと異なっており、その使用効果は各段に差が生じるのである。
【００１８】
まず、第１点目は、ダボ１１及びダボ孔１２の配置であり、上面１５及び底面１６のいずれか一方の面に３個のダボ１１を、中心貫通孔１３に関して互いに１２０°離れた位置にある貫通孔５の端部に設け、ダボ孔１２は、ダボ１１を設けた面と異なる側の面で、ダボ１１を設けなかった貫通孔５の端部に設けた。この様子は、図２に示す平面上の二重実線及び二重点線（裏面側）、あるいは図３に示す縦断面から明らかであろう。本発明によるこのダボ１１及びダボ孔１２の配置は、このバイパス路付きギッター煉瓦を上段と下段で位置をずらして重ねられるように考慮したものである。
【００１９】
第２点目は、バイパス路の形状であり、従来のバイパス路付きギッター煉瓦のそれは互いに１本のガス流路間を連通させるものであったが、本発明では３本の近接するガス流路間を共通させて連通させるようにしてある。つまり、図２から明らかなように、上記６本の貫通孔５のうち、ダボ１１又はダボ孔１２が設けられていない端部と、それに近接する３本の上下溝６の端部とを連通させるため、比較的広い面積の切欠（以下、広幅共同溝１７という）を煉瓦上面あるいは底面に設けたのである。バイパス路をかかる形状にしたことによって、少ない重ね段数で、すべてのガス流路間に連通するバイパス路を形成できるようになる。
【００２０】
また、該バイパス路は、上記広幅共同溝１７が深いと、ガス流の抵抗は小さいが、損傷を受けやすい一方、浅いとガス流の抵抗は大きいが、損傷は受け難くなる。発明者は、このことを考慮してガス流れ抵抗に関する実験を行い、本発明での広幅共同溝１７の深さを、煉瓦高さの３％以上１４％以下の範囲内にするのが好ましいとしたのである。なお、本実施例では、その値は、５ｍｍ〜２１ｍｍ程度となる。
【００２１】
次に、図４及び図５を参照して、本発明に係る上記バイパス路付きギッター煉瓦の積み重ね方法を説明する。図４は、該バイパス路付きギッター煉瓦を３段に積み重ねた状態を示す平面図である。それは、１段目を一点鎖線の六角形、２段目を破線の六角形、３段目を実線の六角形で描いてある。その積み方は、各段共通して煉瓦側面同士を互いに隙間なく接触させるが、２段目は、１段目煉瓦の３つの頂点１８上にその中心貫通孔１３が位置するように積み（１ケ所位置決めすると、他の２ケ所はおのずと決まる）、３段目は、１段目煉瓦の残り３つの頂点１８’の鉛直線上に、３段目煉瓦の中心貫通孔１３’がくるように積むことになる。このように積むと、先に示した図２の平面図を参照すれば理解できるように、２段に積んだ時点で全ガス流路のうちの半分が上記広幅共同溝１７で連通し、３段目で残り半分が連通することになる。従って、本発明では、この３段１セットを、上記バイパス路付きギッター煉瓦の積み方の基本とし、それを繰り返して、蓄熱室２の全段をこのバイパス路付きギッター煉瓦で積んだり、あるいはバイパス路のないギッター煉瓦と組み合わせて適当な段数（以下、層ということあり）だけ積むようにしたのである。図５に、本発明に係る上記の積み方で６段にした例を示すが、ガス流路で欠落片２６等に起因した詰りが発生しても、ガス２５は、バイパス路を利用して迂回するようになる。
【００２２】
従って、本発明に係るギッター煉瓦とその積み重ね方法を蓄熱室２の煉瓦積みに採用すれば、蓄熱室２の全ガス流路を長期間有効に使用することができるようになる。その結果、蓄熱室２の伝熱面積の減少を防止でき、高い熱効率を維持できる。また、バイパス路は、煉瓦面の周縁の３か所に等間隔離れて形成されているので、比較的容易に該バイパス路付きギッター煉瓦は製造でき、しかも上に積む煉瓦を支持する支持面積の減少を防止できるのである。
【００２３】
次に、本発明に係るバイパス路付きギッター煉瓦及びその積み重ね方法を利用する技術として、熱風炉蓄熱室の煉瓦積み補修方法を説明する。
高炉を有する製鉄会社の経済的メリットを配慮すると、高炉改修時に、既設熱風炉３を一部補修して再利用することは当然のことである。前述したように、蓄熱室２ギッター煉瓦の貫通率の調査によれば、一定期間使用したものは蓄熱室断面全体の平均で７０．３％であり、ガス流路の閉塞は、蓄熱室外周部と蓄熱室（２５０段程度積む）の上半分に用いる珪石を使用したギッター煉瓦２７に多く、下半分の高アルミナ質２８や粘土質２９のものに少ない。なお、これらのギッター煉瓦は、バイパス路を有していないのが現状である。
【００２４】
そこで、本発明では、蓄熱室の煉瓦積みを補修する方法として、２つの補修技術を提案する。１つは、上記バイパス路を有しないギッター煉瓦１９を積んだ熱風炉蓄熱室の煉瓦層を補修するに際して、上記バイパス路を有しないギッター煉瓦１９の層間に、上記３段１セットのバイパス路付きギッター煉瓦２０の層を少なくとも１セット介在させるものであり、他の１つは、上記熱風炉蓄熱室の煉瓦層を、高さ方向で２分して下方層を再使用に残し、更新する上方層にバイパス路付きギッター煉瓦２０を少なくとも１セット積み込むものである。
【００２５】
これら方法の実施態様の一例を、前者に関しては図１１に、後者に関しては図１２に示す。図１１では、本発明に係るバイパス路付きギッター煉瓦２０の３段１セットの層を３セット連続したものを、バイパス路のないギッター煉瓦１９の層間に２ケ所介在させている。また、図１２では、蓄熱室煉瓦の下半分は、既設のギッター煉瓦１９を残存させ、その上に本発明に係るバイパス路付きギッター煉瓦２０を２セット積み、さらにその上に珪石質のバイパス路なしのギッター煉瓦１９を積み直している。なお、本発明に係るバイパス路付きギッター煉瓦２０のセットを介在させる組合せは、無数にあり、いずれの方法を採用するかは、改修すべき蓄熱室２の状態に依存するので、本発明では該組合せまで限定するものではない。
【００２６】
また、これら補修方法の効果については、本発明に係るバイパス付きギッター煉瓦２０の使用程度によって変わるので、後者に関して熱風炉３の熱効率回復を評価対象とした場合を例として、２５３段のうち１１１段のギッター煉瓦更新の場合の実績及び計算値を図１３に示しておく。つまり、図１３の横軸は、ガスの貫通程度を表わす指数で、その値０．００は、古いバイパス路を有しないギッター煉瓦１９を流用した部分の該貫通率が７０％で、新しいバイパス炉を有しないギッター煉瓦１９に更新した部分も７０％になった時の状態を示し、１．０は、更新部の貫通率が１００％のものを示している。縦軸は、次式による熱風炉の熱効率であり、図中に矢印で示す数字は、本発明に係るバイパス路付きギッター煉瓦の介在量である。図１３によれば、ガス貫通率は、本発明に係るバイパス路付きギッター煉瓦の介在で変わるが、それに伴い熱効率が増大する様子を示している。そして、本発明に係るバイパス路付きギッター煉瓦の層を５セット介在させた結果、熱風炉３の熱効率は、９０．４％となったことを示している。
熱効率（１００％）＝（送風熱量−送風空気の顕熱）／（燃料ガスの燃焼熱量）
【００２７】
【発明の効果】
以上説明したように、本発明により、蓄熱室の全てのガス流路が互いに連通するようになるので、本発明を熱風炉の新設あるいは補修時に利用すれば、熱風炉の熱効率を低下させずに、熱風炉の再利用が可能となる。
【図面の簡単な説明】
【図１】本発明に係るバイパス路付きギッター煉瓦の一実施形態を示す斜視図である。
【図２】図１のバイパス路付きギッター煉瓦の平面図である。
【図３】図２のＡ−Ａ断面図である。
【図４】本発明に係るバイパス路付きギッター煉瓦を３段に積み重ねた状態を線のみで示す平面図である。
【図５】図４のＢ−Ｂ断面の一部の縦断面図であり、本発明に係るバイパス路付きギッター煉瓦を６段に積み重ねた場合の連通状態を示す図である。
【図６】熱風炉の縦断面を示す図である。
【図７】熱風炉蓄熱室煉瓦のガス流路の貫通率分布を示す図である。
【図８】実開昭５−７７２４２号公報で開示されたバイパス路付きギッター煉瓦の図であり、（ａ）は斜視図、（ｂ）は平面図である。
【図９】実開平５−９６０４６号公報で開示されたバイパス路付きギッター煉瓦を示す図であり、（ａ）は平面、（ｂ）は縦断面である。
【図１０】実開平５−９６０４６号公報で開示されたバイパス路付きギッター煉瓦の別形態を示す図であり、（ａ）は平面、（ｂ）は縦断面である。
【図１１】蓄熱室煉瓦の補修形態を示す縦断面図である。
【図１２】蓄熱室煉瓦の別の補修形態を示す縦断面図である。
【図１３】蓄熱室煉瓦の補修に本発明に係るバイパス路付きギッター煉瓦を介在させた場合の熱風炉熱効率の回復程度を示す図である。
【符号の説明】
１燃焼室
２蓄熱室
３熱風炉
４ギッターあるいはチェッカー煉瓦
５貫通孔
６上下溝
７煉瓦本体
９水平溝
１０水平貫通孔
１１ダボ
１２ダボ孔
１３中心貫通孔
１３’ ３段目煉瓦の中心貫通孔
１４側面
１５上面
１６底面
１７広幅共同溝
１８頂点
１８’ １段目煉瓦の残りの頂点
１９バイパス路なしギッター煉瓦
２０バイパス路付きギッター煉瓦
２１中間位置
２２煙突
２３冷風
２４熱風本管
２５ガス
２６欠落片
２７珪石を使用したギッター煉瓦
２８高アルミナ質ギッター煉瓦
２９粘土質ギッター煉瓦 [0001]
BACKGROUND OF THE INVENTION
The present invention is superimposed seen product to the heat storage chamber of the hot blast stove, Checker fireclay brick as a medium of heat exchange between the hot gas and the cold air, to brickwork repair method of the product viewed superposed method and a hot air oven Regenerator.
[0002]
[Prior art]
In blast furnace operation, a large amount of air is required to burn the coke charged in the blast furnace. This air uses a hot air furnace 3 (see FIG. 6) consisting of a combustion chamber 1 and a heat storage chamber 2 to burn fuel gas, store heat to the brick of combustion heat, heat exchange between the stored brick and new cold air, etc. After the action, it is preheated to 700-1300 ° C. and then continuously sent to the blast furnace. In order to perform this continuous blowing, 3 to 4 hot blast furnaces 3 are usually installed for one blast furnace, and are used by switching appropriately.
[0003]
By the way, in order to store the combustion heat, a so-called glitter or checker brick 4 is stacked in multiple stages (usually about 250 stages) in the heat storage chamber 2. Each of the brick bricks 4 has a through hole 5 and a groove (hereinafter referred to as an upper and lower groove 6) upward and downward in order to form a gas flow path through which high-temperature gas obtained by combustion and air to be heated pass. Many are provided. Incidentally, the hexagonal pillar-shaped glitter brick 4 (see FIG. 8), which will be described later, has 12 upper and lower grooves 6 formed along the side surface of the brick in addition to the seven through holes 5, and these grooves 6 are also made of brick. When stacked, 5 through-holes [(cross-section 1/2 groove × 6) + (1 / 3-circle groove × 6) = 5] combined with adjacent brick groove 6 Therefore, a total of 12 through holes (gas flow paths) are provided per brick. Therefore, the recently established hot stove 3 has gas passages having the same diameter of about 11,000 to 18,000 communicating with each heat storage chamber in the vertical direction.
[0004]
However, if the gas flow path has been used for many years, the gas flow path appears to be blocked due to adhesion growth of dust, partial melting of bricks due to local heating, inflow of foreign matter, and the like. If a blockage occurs in the middle of one gas flow path, the entire flow path cannot be used for heat storage or heat exchange, which affects the thermal efficiency of the hot stove 3. During many blast furnace repairs, the penetration rate of the gas flow path in the hot stove 3 has been investigated. The result is shown numerically in FIG. 7, and the penetration rate is 70.3% on average over the entire cross section of the heat storage chamber, and the surrounding penetration rate seems to be lower than the central part. In addition, when the blockage position of the gas flow path was investigated, it is clear that this blockage often occurs in the siliceous brick used in the upper half of the heat storage chamber 2, and is less in the high alumina or clay brick in the lower half. It has become.
[0005]
On the other hand, the blast furnace was previously renovated at a rate of about once every 10 years. However, the hot blast furnace 3 has a longer life and lasts about 20 years. 3 was often reused as is. At that time, if there is a decrease in the penetration rate as described above, the blast furnace operation after the repair is performed in the hot stove 3 having very poor thermal efficiency. In addition, some blast furnaces in recent years have been operated continuously for more than 15 years. Accordingly, further extension of the life of the hot stove 3 and improvement of thermal efficiency are required.
[0006]
Therefore, as shown in FIG. 8, Japanese Utility Model Laid-Open No. 5-77242 discloses a hexagonal columnar jitter brick in which a vertical gas flow path is formed by seven through holes 5 and twelve upper and lower grooves 6. A groove is engraved horizontally around the upper surface and / or the bottom surface (hereinafter referred to as horizontal groove 9), and the ends of the horizontal groove 9 and the upper and lower grooves 6 are communicated with each other (FIG. 8B). )reference). This horizontal groove 9 acts as a bypass for gas flow when bricks are stacked in multiple stages. Therefore, when this brick brick is used, even if a blockage occurs in a part of the gas flow path, By detouring the gas, it becomes possible to avoid complete blockage of the gas flow path.
[0007]
Further, as shown in FIGS. 9 and 10, Japanese Utility Model Laid-Open No. 5-96046 discloses a large number of horizontal grooves 9 in the surface, not around the top surface and / or the bottom surface, or a large number of horizontal through holes in the main body itself. A hexagonal pillar-shaped glitter brick in which 10 is provided in a complicated manner (for example, radially) to form a bypass is disclosed.
The above-mentioned Gita brick described in Japanese Utility Model Publication No. 5-77242 has an annular dowel 11 (provided with a ring-shaped protrusion at the end of the through hole) and dowel hole 12 (through) The hole end portion is a ring-shaped stepped structure) provided at the upper and lower ends of three identical through-holes 5 at a position of 120 ° with respect to the central through-hole. However, this dowel 11 is obstructive and cannot be communicated with the horizontal groove, so that the method of stacking bricks is restricted and there is a disadvantage that free stacking cannot be performed. As a result, part of the gas flow path that does not communicate in the horizontal direction in the bypass path remains. In addition, the gas flow path (gas flow path with dowels) corresponds to 25% of the total, and if partial blockage occurs there, no gas flows through the gas flow path. Even if the bricks described in Japanese Patent Publication No. Gazette were used, there was a limit to improving thermal efficiency.
[0008]
On the other hand, in the glitter brick described in Japanese Utility Model Laid-Open No. 5-96046, it is possible to form a bypass passage so that all the gas passages communicate with each other. However, if the bypass path is formed in this way, the brick structure becomes complicated, and the strength of the brick is reduced when stacked. Furthermore, the manufacturing process of bricks becomes complicated, and an increase in production cost is inevitable.
[0009]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION In view of such circumstances, the thermal efficiency of hot air oven maintained high level, and to provide a relatively easily bypass passage with Checker fireclay bricks and the product viewed superimposed way can be produced in high strength, these Another object is to provide a method for repairing a hot stove regenerator using technology.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the inventor reviewed the problems of the conventional brick brick with a bypass path. As a result, when stacking bricks including repairs, the arrangement of dowels and dowel holes, the shape of the bypass path for improving the brick strength, and the depth of the bypass for the passage of gas, The idea of the present invention has been made.
[0011]
The present invention includes a hexagonal columnar brick main body, one central through hole vertically passing through the center thereof, six through holes that surround the central through hole and are provided at 60 ° intervals, and side surfaces of the main body. Along each of the apexes of the hexagon, the center position between the apexes, and a gas flow path composed of a number of upper and lower grooves that form a through hole in combination with the adjacent bricks, and any of the upper and lower surfaces of the main body provided in the through hole end of the six in the pressure, the Checker fireclay bricks and a dowel and the dowel hole for restraining the lower the body when the piled saw product, the one side of the body, the dowel, Provided at the ends of three through-holes that are 120 ° apart from each other with the central through-hole as a reference, the dowel holes are provided at the other end of the other three through-holes, and the gas flow paths communicate with each other Of the six through holes, the dowel or the end where no dowel hole is provided And parts, thereby communicating the end of the three vertical grooves adjacent thereto, notch the wide joint groove bricks Ru was acting as a bypass between said when laden multistage each gas passage from the upper and lower body surfaces Gitter brick with bypass, characterized by
[0012]
Further, the present invention is or the wide joint grooves formed 3 places on one side of the body, or that the depth of the wide joint groove, and the Checker fireclay bricks in height range of 3% to 14% less It is a featured brick brick with bypass.
Furthermore, in the present invention, when stacking the brick bricks having the bypass passage according to any one of claims 1 to 3 in the heat storage chamber of the hot stove , the side surfaces of the bricks are brought into contact with each other so that there is no gap between them, thereby forming one step. The second stage is stacked such that the center through hole of the second stage brick is located on the apex of the first stage brick and the dowel and dowel hole are fitted, and the third stage is the first stage brick. The bypass passage is characterized in that the center through hole of the third-stage brick is positioned on the vertical line of the remaining vertex, and is stacked so that the dowel and the dowel hole are fitted, and these three stages are repeated in one set of layers. is the product only overlap method of per Checker fireclay brick.
[0013]
In addition, the present invention is a method for stacking bricks with bypass paths, characterized in that, in addition to the layer in which the above-mentioned bypass bricks are stacked in multiple layers, a layer of glitter bricks without bypass paths is arranged. .
In addition, a hexagonal columnar brick main body, one central through-hole penetrating vertically through the center, six through-holes surrounding the central through-hole and provided at 60 ° intervals, and along the side of the main body Each of the apexes of the hexagon, the gas flow path comprising a number of upper and lower grooves carved at the center position between the apexes and forming a through hole in combination with the adjacent bricks, and either the upper or lower surface of the main body In repairing the brick layer of the hot-blast stove regenerator chamber, which is provided at the end of the six through-holes in the above-mentioned six piled holes and is equipped with dowels and dowel holes that restrain the top and bottom when stacking the main body. during the firewood Potter brick layer, on the one side of the body, the dowel is provided on three of the through-hole ends in 120 ° intervals around the center through-hole, the other remaining three holes The dowel hole is provided at the end on the surface side, and the gas flow paths are communicated with each other. Of the six through-holes, when the dowels or the end portions where the dowel holes are not provided are communicated with the end portions of the three upper and lower grooves adjacent thereto, the bricks are stacked in multiple stages. Gitter bricks with bypass passages that are notched from the upper and lower sides of the main body surface between the gas flow passages and act as bypass passages. The second stage is stacked such that the center through hole of the second stage brick is positioned on the apex of the first stage brick and the dowel and the dowel hole are fitted, and the third stage is the first stage Stack the center brick of the third tier brick so that the dowel and dowel hole fit together on the vertical line of the remaining apex of the brick. At least one set intervenes or the above hot stove The brick layer of the heat chamber is divided into two in the height direction, the lower layer is left for reuse, and at least one set of three-stage set of the above-mentioned bypass bricks is loaded on the upper layer. It is also a method for repairing bricks in the hot stove regenerator.
[0014]
In the present invention, since the brick brick is structured as described above, a large number of gas flow paths of 11,000 to 18,000, which have flowed gas independently only in the vertical direction, are only one set in three stages. By stacking, all gas flow paths communicate in the horizontal direction. Therefore, if this three-stage set is arranged so that all or several sets of brick layers of the heat storage chamber 2 having about 250 stages are arranged, even if a part of the gas flow path is blocked by a missing piece or the like, Since the portion is bypassed, the blocked gas flow path is not completely wasted. As a result, the heat storage chamber 2 can suppress a decrease in the heat transfer area and can maintain high thermal efficiency. In addition, the bypass path is divided into three locations on the upper surface of the brick and is formed at equal intervals, so that it can be manufactured relatively easily and the strength can be ensured. Furthermore, since the shape and depth of the bypass are determined so that the ventilation resistance is comparable to that of the gas flow path in the vertical direction, the gas flows smoothly to the bypass path. In addition, by utilizing the bypass passage with Checker fireclay bricks and the product viewed superposed method according to the present invention for repairing the regenerator, significant benefits to the conservation of the blast furnace equipment, i.e., will provide the economic and facility merit .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
First, with reference to FIGS. 1-3, one Embodiment of the glitter brick with a bypass path which concerns on this invention is described. 1 is a perspective view of the bypass brick with a bypass, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
As is clear from FIG. 1, the brick body 7 has a hexagonal column shape with a height of 150 mm and a side length of 136 mm, and has a through hole 5 having a circular cross section penetrating between the top surface 15 and the bottom surface 16. . The through-hole 5 includes one central through-hole 13 located at the center of the surface and six through-holes 5 surrounding the central through-hole 13 and spaced at 60 ° from each other. Thus, it becomes a gas flow path through which combustion gas and air pass in the vertical direction.
[0016]
Each apex 18 of the hexagonal columnar brick body 7 has six upper and lower grooves 6 extending in the vertical direction along the side surface 14 of the brick body 7, and the cross-sectional areas of the upper and lower grooves 6 are respectively the through-hole areas. It is one third of. Furthermore, at the intermediate position 21 of each side of the hexagon, six vertical grooves 6 whose cross-sectional area is half of the through-hole 5 are formed in the vertical direction along the side surface 14 of the brick body 7 as described above. ing. These twelve upper and lower grooves 6 are combined with the upper and lower grooves 6 of adjacent bricks when bricks are stacked to form holes having the same diameter as the through-holes 5 and serve as vertical gas flow paths.
[0017]
In addition, on the upper surface 15 and the bottom surface 16 of the brick main body 7, the dowels 11 and the dowel holes 12 that lock the bricks positioned above and below when the bricks are stacked are any of the six through holes 5. It is provided at one end. The dowel 11 is a ring-shaped protrusion, and the dowel hole 12 is a recess having a circular cross section for receiving the protrusion.
Up to this point, the shape is almost the same as that of the above-described conventional bypass brick with a bypass path, but the present invention is different from the conventional one in the following points, and the use effect differs in each stage.
[0018]
First, the first point is the arrangement of the dowels 11 and dowel holes 12, and the three dowels 11 on either one of the upper surface 15 and the bottom surface 16 are positioned 120 ° apart from each other with respect to the central through hole 13. The dowel hole 12 was provided at the end of the through hole 5, and the dowel hole 12 was provided at the end of the through hole 5 where the dowel 11 was not provided. This state will be apparent from the double solid line and double dotted line (on the back side) on the plane shown in FIG. 2, or from the longitudinal section shown in FIG. The arrangement of the dowels 11 and the dowel holes 12 according to the present invention is designed so that the jitter bricks with bypass passages can be stacked with their positions shifted at the upper and lower stages.
[0019]
The second point is the shape of the bypass passage, and that of the conventional brick brick with a bypass passage communicates between one gas passage, but in the present invention, three adjacent gas passages are used. They communicate with each other in common. That is, as is apparent from FIG. 2, the end portion of the six through holes 5 where the dowel 11 or dowel hole 12 is not provided and the end portions of the three upper and lower grooves 6 adjacent thereto are communicated. Therefore, a notch with a relatively large area (hereinafter referred to as a wide joint groove 17) is provided on the top or bottom surface of the brick. By forming the bypass path in such a shape, it is possible to form bypass paths communicating between all the gas flow paths with a small number of overlapping stages.
[0020]
Further, when the wide joint groove 17 is deep, the bypass passage has a small gas flow resistance, but is easily damaged. On the other hand, when the wide joint groove 17 is shallow, the gas flow resistance is large, but the damage is difficult to receive. The inventor considers this and conducts an experiment on the gas flow resistance, and it is preferable to set the depth of the wide joint groove 17 in the present invention within the range of 3% to 14% of the brick height. It was. In this embodiment, the value is about 5 mm to 21 mm.
[0021]
Next, with reference to FIGS. 4 and 5, illustrating the product seen overlapping method of the bypass passage with Checker fireclay bricks according to the present invention. FIG. 4 is a plan view showing a state in which the bypass brick with a bypass path is stacked in three stages. The first stage is drawn with a one-dot chain hexagon, the second stage is a broken hexagon, and the third stage is a solid hexagon. As for the stacking method, the brick side surfaces are brought into contact with each other without a gap in common with each step, but the second step is stacked such that the central through hole 13 is positioned on the three vertices 18 of the first step brick (1 (The other two places are naturally determined when positioning is done.) The third stage is stacked so that the central through hole 13 'of the third-stage brick comes on the vertical line of the remaining three vertices 18' of the first-stage brick. become. When stacked in this way, as can be understood with reference to the plan view of FIG. 2 shown above, half of all the gas flow paths are communicated with the wide joint groove 17 when stacked in two stages. The other half communicates at the stage. Accordingly, in the present invention, the three-stage set, the basic loading and how the bypass passage with Checker fireclay bricks, repeat it, Dari gained all stages of regenerator 2 in the bypass passage with Gitta over brick, or The appropriate number of steps (hereinafter sometimes referred to as “layers”) was stacked in combination with the bricks without bypass. FIG. 5 shows an example of six stages in the above stacking method according to the present invention. Even if clogging due to the missing piece 26 or the like occurs in the gas flow path, the gas 25 uses the bypass path. It becomes to detour.
[0022]
Therefore, by adopting Checker fireclay bricks according to the present invention and its product seen superimposed manner brickwork of the regenerator 2, so the total gas flow path of the heat storage chamber 2 can be effectively used for a long period of time. As a result, a reduction in the heat transfer area of the heat storage chamber 2 can be prevented, and high thermal efficiency can be maintained. In addition, since the bypass path is formed at equal intervals at three locations on the periphery of the brick surface, the bypass brick with a bypass path can be manufactured relatively easily, and the support area for supporting the brick stacked on the bypass path is relatively high. The decrease can be prevented.
[0023]
Next, as a technique for utilizing a bypass passage with Checker fireclay bricks and the product viewed superposed method according to the present invention, illustrating the brickwork repairing method of a hot air furnace regenerator.
Considering the economic merit of a steel company having a blast furnace, it is natural that a part of the existing hot stove 3 is repaired and reused when the blast furnace is repaired. As described above, according to the investigation of the penetration rate of the heat storage chamber 2 Gitter brick, the one used for a certain period is 70.3% on the average of the entire cross section of the heat storage chamber, and the blockage of the gas flow path is It is more common in the glitter brick 27 using the silica used in the upper half of the heat storage chamber (stacking about 250 stages), and less in the high alumina 28 and clay 29 of the lower half. In addition, the present condition is that these glitter bricks do not have a bypass.
[0024]
Therefore, in the present invention, two repair techniques are proposed as a method of repairing the brick storage in the heat storage chamber. One when repairing brick layer of a hot-air furnace regenerator laden Checker fireclay bricks 19 without the bypass passage, between the layers of no formic Potter bricks 19 on the Symbol bypass passage, the three-stage set bypass At least one set of layered glitter bricks 20 is interposed, and the other one is a renewal of the brick layer of the hot stove regenerator, divided into two in the height direction, leaving the lower layer reused. a bypass passage with Gitta over bricks 20 above layer to those embarking at least one set.
[0025]
An example of an implementation of these methods is shown in FIG. 11 for the former and FIG. 12 for the latter. In Figure 11, the three sets that successive three-stage set layer of the bypass passage with Checker fireclay brick 20 according to the present invention, the layers of the bypass passage of significance Potter bricks 19 are interposed two places. Further, in FIG. 12, the lower half of the regenerator bricks, is left to existing formic Potter bricks 19, thereon a bypass passage with Checker fireclay brick 20 according to the present invention two sets of loading the further bypass silica substance thereon and re-loading the formic Potter brick 19 with no road. In addition, since there are innumerable combinations with which the set of the glitter brick 20 with a bypass path according to the present invention is interposed, which method is adopted depends on the state of the heat storage chamber 2 to be repaired. The combination is not limited.
[0026]
The effects of these repair methods vary depending on the degree of use of the bypassed glitter brick 20 according to the present invention. Therefore, with respect to the latter, 111 cases out of 253 are used as an example of the case where the thermal efficiency recovery of the hot stove 3 is evaluated. FIG. 13 shows the actual results and calculated values in the case of updating the brick brick. That is, the horizontal axis of FIG. 13 is an index representing the degree of gas penetration, and the value 0. 0 0 70% said through rate of the portion diverted formic Potter brick 19 having no old bypass state when also updated the new bypass furnace without Checker fireclay bricks 19 parts was 70% 1.0 indicates that the update unit has a penetration rate of 100%. The vertical axis represents the thermal efficiency of the hot stove according to the following equation, and the number indicated by the arrow in the figure is the amount of interposition of the bypass brick with a bypass according to the present invention. According to FIG. 13, the gas penetration rate changes with the intervention of the bypass brick with the bypass passage according to the present invention, and the thermal efficiency is increased accordingly. And it has shown that the thermal efficiency of the hot stove 3 became 90.4% as a result of interposing 5 sets of the layers of the glitter brick with a bypass path which concerns on this invention.
Thermal efficiency (100%) = (Blowing heat amount-Sensible heat of blowing air) / (Fuel gas combustion heat amount)
[0027]
【The invention's effect】
As described above, according to the present invention, all the gas flow paths of the heat storage chamber are communicated with each other. Therefore, if the present invention is used at the time of newly installing or repairing a hot stove, without reducing the thermal efficiency of the hot stove. The hot stove can be reused.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a glitter brick with a bypass path according to the present invention.
FIG. 2 is a plan view of the jitter brick with bypass path of FIG. 1;
3 is a cross-sectional view taken along the line AA in FIG.
FIG. 4 is a plan view showing only a line a state in which the glitter bricks with bypass paths according to the present invention are stacked in three stages.
5 is a longitudinal sectional view of a part of the BB cross section of FIG. 4, and is a diagram showing a communication state in the case where the bypass bricks with bypass paths according to the present invention are stacked in six stages.
FIG. 6 is a view showing a longitudinal section of a hot stove.
FIG. 7 is a diagram showing a penetration rate distribution of a gas flow path in a hot stove regenerator brick.
FIGS. 8A and 8B are diagrams of a bypass brick with a bypass path disclosed in Japanese Utility Model Laid-Open No. 5-77242, in which FIG. 8A is a perspective view and FIG. 8B is a plan view.
FIGS. 9A and 9B are diagrams showing a jitter brick with a bypass path disclosed in Japanese Utility Model Laid-Open No. 5-96046, in which FIG. 9A is a plane, and FIG. 9B is a longitudinal section.
FIGS. 10A and 10B are diagrams showing another embodiment of the bypass brick with a bypass path disclosed in Japanese Utility Model Laid-Open No. 5-96046, in which FIG. 10A is a plane, and FIG. 10B is a longitudinal section.
FIG. 11 is a longitudinal sectional view showing a repair mode of a heat storage chamber brick.
FIG. 12 is a longitudinal sectional view showing another repair mode of a heat storage chamber brick.
FIG. 13 is a diagram showing the degree of recovery of hot stove thermal efficiency when a bypass brick with a bypass path according to the present invention is interposed in repairing a heat storage chamber brick.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Thermal storage chamber 3 Hot stove 4 Gitter or checker brick 5 Through-hole 6 Vertical groove 7 Brick main body 9 Horizontal groove 10 Horizontal through-hole 11 Dowel 12 Dowel hole 13 Center through-hole 13 'Center through-hole 14 of the 3rd step brick side 15 top 16 bottom 17 wide joint groove 18 vertices 18 'first stage remaining vertices 19 bypass teeth formic Potter brick 20 bypass passage with Checker fireclay brick 21 intermediate position 22 chimney 23 cold 24 hot mains 25 gas 26 missing brick Checker fireclay bricks 28 using piece 27 silica high alumina question Potter practitioners tiles 29 clay Q & Potter practitioners tiles

Claims

A hexagonal columnar brick body, one central through-hole penetrating the center of the brick body, six central through-holes surrounding the central through-hole and provided at 60 ° intervals, and along the side of the main body, Each of the vertices, a gas flow path composed of a number of upper and lower grooves which are carved at the center position between the vertices and combined with adjacent bricks to form a through-hole, and the above six on either the upper or lower surface of the main body Gitter bricks provided with dowels and dowel holes that restrain the top and bottom when the main body is stacked,
On one side of the main body, the dowels are provided at three end portions of the three through holes that are spaced from each other by 120 ° with respect to the center through hole, and the dowel holes are provided at the other end portions of the other three through holes. Among the six through-holes, the end where the dowels or dowel holes are not provided and the ends of the three upper and lower grooves adjacent to the dowel holes are communicated with each other so as to communicate between the gas flow paths. A wide-width joint groove that acts as a bypass path between the gas flow paths when the bricks are stacked in multiple stages is cut out from above and below the main body surface.

2. The brick with bypass passage according to claim 1, wherein the wide joint groove is formed at three locations on one surface of the main body.

The depth of the said wide joint groove was made into the range of 3% or more and 14% or less of the said brick brick height, The glitter brick with a bypass path of Claim 1 or 2 characterized by the above-mentioned.

When stacking the brick brick having the bypass path according to any one of claims 1 to 3, in the heat storage chamber of the hot stove,
Side surfaces of the bricks are brought into contact with each other without any gaps, and a first step is formed. The second step has a central through hole of the second step brick located on the top of the first step brick, and a dowel and a dowel Stack the holes so that the holes fit, and place the third stage on the vertical line of the remaining vertex of the first stage brick so that the center through hole of the third stage brick is located and the dowel and dowel hole fit together. A method for stacking the gitter bricks with bypass passages, characterized in that these three steps are repeated in one set of layers.

5. The method for stacking bricks with bypass paths according to claim 4, wherein, in addition to the layer in which the glitter bricks having bypass paths are stacked in multiple stages, a layer of glitter bricks without bypass paths is disposed.

A hexagonal columnar brick body, one central through-hole penetrating the center of the brick body, six central through-holes surrounding the central through-hole and provided at 60 ° intervals, and along the side of the main body, Each of the vertices, a gas flow path composed of a number of upper and lower grooves which are carved at the center position between the vertices and combined with adjacent bricks to form a through-hole, and the above six on either the upper or lower surface of the main body When repairing a brick layer of a hot stove regenerator chamber loaded with a gitter brick provided with dowels and dowel holes that restrain the top and bottom when the main body is stacked ,
Before between firewood Potter brick layer, on the one side of the body, the dowel is provided on three of the through-hole ends in 120 ° intervals around the center through-hole, the remaining three holes The dowel hole is provided at the other surface side end, and among the six through holes, the dowel or the end not provided with the dowel hole and the three adjacent to the dowel hole so as to communicate between the gas flow paths are provided. Gitter bricks with bypass passages, in which wide joint grooves that act as bypass passages between the gas flow paths when the bricks are stacked in multiple stages are communicated with the ends of the upper and lower grooves of the main body surface, Side surfaces of the glitter bricks having the bypass path are brought into contact with each other without any gaps, and a first stage is formed, and the second stage has a central through hole of the second stage brick located on the top of the first stage brick. And the dowel and dowel hole are stacked so that the dowel hole fits. On the vertical line of the remaining vertices of the eye bricks, and position the central through hole of the third stage brick, stacked as dowel and the dowel hole is fitted, a layer of Checker fireclay brick having a bypass passage of these three stages set A method for repairing brickwork in a hot stove regenerator, characterized in that at least one set is interposed.

A hexagonal columnar brick body, one central through-hole penetrating the center of the brick body, six central through-holes surrounding the central through-hole and provided at 60 ° intervals, and along the side of the main body, Each of the vertices, a gas flow path composed of a number of upper and lower grooves which are carved at the center position between the vertices and combined with adjacent bricks to form a through-hole, and the above six on either the upper or lower surface of the main body provided the through-hole ends, when repairing a brick layer of a hot-air furnace regenerator loaded with Checker fireclay brick example Bei the dowel and the dowel hole to restrain the up and down when the stacked body,
The brick layer of the hot stove regenerator is divided into two in the height direction and the lower layer is left for reuse, and the upper layer is a set of three stages of a set of glitter bricks having a bypass passage according to claim 6. A brick-laying repair method for a hot stove regenerator, characterized in that at least one set is loaded.