JP3934932B2

JP3934932B2 - Spray refractory mixed supply device and spray method using the same

Info

Publication number: JP3934932B2
Application number: JP2001384758A
Authority: JP
Inventors: 茂之丸山; 正史大住; 英二元木; 浩人津田; 史郎祐成; 浩太朗梅本
Original assignee: 日本プライブリコ株式会社
Priority date: 2001-12-18
Filing date: 2001-12-18
Publication date: 2007-06-20
Anticipated expiration: 2021-12-18
Also published as: JP2003185349A

Description

【０００１】
【発明の属する技術分野】
本発明は、吹付け耐火材を使用する現場で、簡易に粒度の異なる２以上の吹付け材料を任意な比率で混合し、混合しながら吹付け機に連続的に供給できる吹付け耐火材の混合供給装置およびそれを用いた吹付け方法に関する。
【０００２】
【従来の技術】
近年、工場内などで発生する使用済みのレンガおよび耐火材（以下、使用済み耐火物という）の処理方法の一つとして、使用済み耐火物を破砕して粒度を調整した廃材とし、この廃材を流し込み耐火材に混入する方法、または事前にミキサー混練した耐火材を吹付ける湿式吹付けの際、この廃材をミキサーに入れて耐火材と混ぜて、有効的に再利用する方法が取られている。湿式吹付けの場合には、大掛かりなミキサーを準備し、かかるミキサーを使用することによりミキサー混練において廃材を容易に混合できる。
【０００３】
しかし、キャスタブル耐火材等の乾燥した粉粒体材料に、吹付け機で一定割合の水分を加えて攪拌しながら連続的に吹付ける乾式吹付けでは、通常ミキサーの準備がないため、廃材を混入しようとしても耐火材と廃材とを均一に混合できない。廃材を乾式吹付け耐火材に適用しようとすると、規定量をそれぞれ事前に秤量し、その後パドルミキサー等の混合装置に投入して一定時間混合した後に排出し、ベルトコンベアー搬送や、スコップによる手投入等で断続的に吹付け機に供給しなければならない。つまり、廃材を混合して吹付け耐火材として使用するには、混合、搬送、吹付け機への投入という３工程が新たに必要となる。このため、乾式吹付けにおいては吹付け耐火材への廃材の適用はされていないのが現状である。
【０００４】
【発明が解決しようとする課題】
前述のように耐火材の乾式吹付けにおいて廃材を吹付け耐火材に混合し、吹付け耐火材として再利用するためには、第一に二つの材料を混合する手段、第二に混合したものを吹付け機まで搬送する手段、第三に混合された吹付け耐火材を吹付け機に投入する手段が必要となる。
【０００５】
このために、非常に煩雑な作業となるばかりでなく、これら各手段は一般にそれぞれ単独作業として実施されるために、複数の機器とこれら機器を運転するための人手が必要となる。さらに、各手段を実現する機器の設置に広い場所も必要となり、乾式吹付けに廃材を利用しようとすると、効率が極めて悪いという問題があった。
【０００６】
本発明は、既存の吹付け耐火材搬送装置（例えばプレダンプナー）を廃材の混入に利用することができ、吹付け耐火材と廃材のように粒度分布の異なる２以上の吹付け耐火材を任意の比率で連続的に混合し供給する装置とこの装置を用いた吹付け方法の提供を目的とする。
【０００７】
【課題を解決する手段】
本発明は、前記目的を達成するためになされたもので、粒度の異なる２以上の吹付け耐火材を一定割合で供給する材料投入用ホッパーと、該材料投入用ホッパーからの吹付け耐火材を搬送する間に混合する混合搬送手段とを具備し、材料投入用ホッパーから供給された前記２以上の吹付け耐火材を前記混合搬送手段で混合して吹付け機に連続的に供給可能な混合供給装置であって、前記材料投入用ホッパー内が仕切板で仕切られており、該仕切板により吹付け耐火材の投入比率を調節し、該投入比率で混合搬送手段に供給することを特徴とする吹付け耐火材の混合供給装置である。さらに、本発明は、前記混合供給装置の混合搬送手段の出口に吹付け機を設置し、混合された吹付け耐火材を該混合搬送手段により吹付け機に連続的に供給して、吹付け機により吹付けることを特徴とする吹付け耐火材の吹付け方法である。
【０００８】
【発明の実施の形態】
本発明において、混合される２以上の吹付け耐火材のうち、一つは乾式吹付けで使用されているキャスタブル耐火材の粉粒体であり、他はこのキャスタブル耐火材とは粒度が異なる耐火材である。この耐火材の代表的なものとして廃材（使用済み耐火物を破砕し、必要に応じて粒度調整したもの）を挙げることができるが、これに限定されない。なお、本明細書において、粒度とはふるい分け等の分級手段で得られる一定の範囲を総称していう。
【０００９】
前記廃材は、工場などで発生する使用済み耐火物を破砕したもので、キャスタブル耐火材に混入すると骨材として機能する。同時に、この廃材の再利用により使用済み耐火物を有効活用できるという大きな利点がある。この場合、廃材の粒度としては２０ｍｍ以下が適当であり、特に１ｍｍ〜５ｍｍの範囲内が望ましい。粒度が１ｍｍより小さいと、骨材としての効果が得られ難くなるからであって、１ｍｍより細かい廃材の混入を積極的に排除するものではない。したがって、１ｍｍより細かい廃材の混入は許容される。一方、粒度が２０ｍｍを超えると、混合しにくくなるばかりでなく、吹付け性や成形性に支障が生じるおそれがある。
【００１０】
本発明においては、既存の乾式吹付けにおける材料投入用ホッパーと耐火材搬送装置が使用できる。特に、耐火材搬送装置は改善や変更を全くしないで、そのまま混合搬送手段として用いても支障がない。また、材料投入用ホッパーは、２以上の吹付け耐火材を一定の投入比率で混合搬送手段に供給するための手段を付設することにより使用できる。この手段として、最も一般的なものは仕切板、特に望ましいのは可動式仕切板である。この仕切板は、材料投入用ホッパー内を複数個のエリアに仕切り、この仕切板を横方向に移動させることにより、各エリアから送出される耐火材の量を調節して、２以上の吹付け耐火材を一定の投入比率で混合搬送手段に連続的に供給する機能を持っている。仕切板以外の手段としては、２以上の吹付け耐火材を材料投入用ホッパーまたは混合搬送手段に一定割合で定量供給する装置などが使用できる。
【００１１】
次に、本発明を乾式吹付けにおける既存の吹付け耐火材搬送装置を使用して、粒度の異なる２つの吹付け耐火材（吹付け耐火材と廃材）を混合し供給する場合について、図面に従って説明する。
【００１２】
図１は、本例における前記の吹付け耐火材の混合供給装置（本装置）の側面図、図２は本装置の正面図、図３は平面図であり、いずれも概略的に表示したもので一部を断面で示している。本装置の主要部は、吹付け耐火材を入れる材料投入用ホッパー１と、該材料投入用ホッパー１から供給される吹付け耐火材を混合しながら連続的に搬送する混合搬送手段２（混合搬送用スクリューフィーダー）により構成されている。
【００１３】
これら材料投入用ホッパー１と混合搬送手段２は、材料投入用ホッパー１の下部に設けた搬送用スクリューフィーダー３により、材料投入用ホッパー１内の吹付け耐火材を混合搬送手段２に供給できるように、基台１１に取り付けられている。
【００１４】
すなわち、材料投入用ホッパー１の下部には搬送用スクリューフィーダー３が設けられていて、この搬送用スクリューフィーダー３をプーリー６、７およびベルト８を通してモーター５で回転することにより、材料投入用ホッパー１内の吹付け耐火材が混合搬送手段２を囲むゴムトラフ（図示せず）内に連続的に排出される。そして、この混合搬送手段２をモーター９で回転すると、吹付け耐火材は均一に混合されながら下流に向かって搬送され、混合搬送手段２の出口１０（図２）から吹付け機２１に連続的に供給される。なお、以上説明した本装置の主要部およびその関連装置は、材料投入用ホッパー１内に設置する仕切板４を除き、実質的に既存の吹付け耐火材搬送装置が利用でき、混合搬送手段２としては例えばプレダンプナーのような既存のものがそのまま使用できる。
【００１５】
本装置では、図１および図２に示すように材料投入用ホッパー１の内部に仕切板４を設けて、材料投入用ホッパー１内を２つのエリアＡ、Ｂに仕切っている。エリアＡは従来のキャスタブル用吹付け耐火材を入れるエリアであり、エリアＢは廃材を入れるためのエリアである。前記仕切板４は横方向（図３の矢印方向）に可動し、エリアＡ、Ｂにそれぞれ投入されている耐火材と廃材の供給量を一定の比率に調節する混合比可変機構を備えている。この機構により仕切板４の設置位置を移動させ、搬送用スクリューフィーダー３へ落ち込む開口部の面積比を変化させることにより、耐火材と廃材の投入比率を任意に変えることができる。そして、一度その投入比率を設定すると、耐火材と廃材を常に設定された投入比率で混合搬送手段２に送給できる。
【００１６】
本装置は、望ましい実施形態として前記材料投入用ホッパー１の上方に吹付け耐火材と廃材の二次供給手段をそれぞれ設置している。すなわち、図１および図３に明示するように材料投入用ホッパー１のエリアＡの上方には、吹付け耐火材の二次供給手段が設けられている。この二次供給手段は、吹付け耐火材投入用ホッパー１２と供給用スクリューフィーダー１３から構成されており、プーリー１４、１８およびベルト１６を通してモーター１７で供給用スクリューフィーダー１３を回転させることにより、吹付け耐火材を材料投入用ホッパー１のエリアＡに連続的または断続的に投入できるようになっている。
【００１７】
一方、材料投入用ホッパー１のエリアＢの上方には、廃材の二次供給手段が設けられている。この装置も同様に廃材投入用ホッパー１９と供給用スクリューフィーダー２０からなり、図示していないがモーターで前記供給用スクリューフィーダー２０を回転させることにより、廃材を材料投入用ホッパー１のエリアＢに連続的または断続的に投入できるようになっている。
【００１８】
材料投入用ホッパー１の二つに分割されたエリアＡ、Ｂには、これらの各二次供給手段の搬送機能を用いて吹付け耐火材と廃材が供給できるので、吹付け耐火材の供給管理が容易となり、投入比率の安定と作業の効率化が図れる。
【００１９】
次に、本装置を用いて吹付け耐火材と廃材を一定の投入比率で混合して乾式吹付けする場合の操作について説明する。先ず本装置を車輪２２を利用して吹付け機２１の位置に移動させ、混合搬送手段２の出口１０が吹付け機２１の高さに適合するように混合搬送手段２の傾斜角度を調整し、その状態で本装置を基台１１に設けた支脚（図示せず）により固定する。
【００２０】
ついで、吹付け耐火材の二次供給手段の吹付け耐火材投入用ホッパー１２に粉粒体状の吹付け耐火材を、また廃材の二次供給手段の廃材投入用ホッパー１９には、前記耐火材より粒度の大きい廃材をそれぞれ投入する。吹付け耐火材と廃材の混合比率に合わせて材料投入用ホッパー１の仕切板４を横方向に移動し、材料投入用ホッパー１からの吹付け耐火材と廃材の供給量をあらかじめ調整しておく。次に、各二次供給手段の供給用スクリューフィーダー１３および２０を回転させて、吹付け耐火材を材料投入用ホッパー１のエリアＡに、廃材を材料投入用ホッパー１のエリアＢにそれぞれ送給し、さらに搬送用スクリューフィーダー３により吹付け耐火材と廃材を一定割合で混合搬送手段２に連続的に供給する。
【００２１】
供給されたこれらの吹付け耐火材と廃材は、混合搬送手段２で搬送される間に均一に混合されて、出口１０から吹付け機２１に連続的に供給される。そして、この吹付け機２１において一定割合の水分を加え、廃材を混合した吹付け耐火材として連続的に吹付けされる。なお、必要に応じ混合搬送手段２において適量の水を、粉塵の飛散防止のために搬送中の吹付け耐火材に加えてもよい。
【００２２】
以上本発明の好ましい実施形態について説明したが、本発明は前記した目的が達成できる範囲で変更できる。例えば、本装置のように吹付け耐火材と廃材を、搬送用スクリューフィーダー３により材料投入用ホッパー１から混合搬送手段２に供給すると、搬送用スクリューフィーダー３で搬送する間にも、吹付け耐火材と廃材が混合されるので好適する。しかし、搬送用スクリューフィーダー３以外の搬送手段で搬送してもよいし、または搬送手段を使用しないで材料投入用ホッパー１から直接混合搬送手段２に供給してもよい。
【００２３】
図４および図５は、本発明の他の実施形態を例示したものである。すなわち、図４は、供給量調節機能を装備したホッパー２３と２５にそれぞれ入っている吹付け耐火材と廃材を、供給用スクリューフィーダー２４と２６を用いて、直接搬送用スクリューフィーダー３に一定の投入比率で連続的に供給するものである。したがって、この場合には、ホッパー２３と２５が材料投入用ホッパーとなる。
【００２４】
図５は、材料投入用ホッパー１には吹付け耐火材と廃材の投入比率を調整するための仕切板４を設けないで、図４と同様に供給量調節機能を装備したホッパー２３および２５により達成する例である。つまり、供給用スクリューフィーダー２４および２６を用いて、ホッパー２３および２５からそれぞれ吹付け耐火材と廃材を一定の投入比率で材料投入用ホッパー１に投入し、必要に応じて例えば攪拌手段２７で均一に攪拌した後に搬送用スクリューフィーダー３に供給する。この結果、材料投入用ホッパー１から搬送用スクリューフィーダー３に供給される吹付け耐火材と廃材は、一定の投入比率となっている。
【００２５】
さらに、本発明は、粒度の異なる３以上の吹付け耐火材の混合搬送手段に対しても、各吹付け耐火材の供給量調節手段を、混合する吹付け耐火材の数に応じて増やすことにより同様に適用できる。また、吹付け耐火材に混合するものとしては廃材が最も一般的であるが、廃材以外のものを混合してもよい。
【００２６】
【実施例】
既存の耐火材搬送装置（２５３５Ｌ×１４３０Ｗ×１５８０Ｈのプレダンプナー）に、図１のように二次供給手段（１２と１３、および１９と２０）を付設するとともに、材料投入用ホッパー１に仕切板４を設けて本発明の装置（２５３５Ｌ×２０００Ｗ×１７００Ｈ）を作製し、次の実験を行った。
【００２７】
実施例１（定量搬送および混合精度の判定）
粒度の異なる２種の投入物を混合して本発明の装置で搬送したとき、投入比率と混合比率の関係、混合比率の安定化度、および従来の吹付け耐火材のみの搬送と同様に搬送量の定量化が得られるかどうかを以下の方法で判定した。
１）試験材料：以下の粒度で構成される吹付け耐火材。
粒度Ａ（１．１８ｍｍ以上）４０％
粒度Ｂ（１．１８ｍｍ未満）６０％
２）試験廃材：粒度１．１８〜５ｍｍ。
【００２８】
（試験方法）
試験材料から粒度Ａを除き、これを廃材添加対応材とした。試験廃材の設定混合率に合わせて仕切板４をセットし、吹付け耐火材投入用ホッパー１２および廃材投入用ホッパー１９にそれぞれ廃材添加対応材および試験廃材を投入し、本発明の装置を運転した。混合搬送手段すなわち混合搬送用スクリューフィーダー２より排出される試料を３０秒毎に採取し、試料に含まれる廃材添加対応材と試験廃材を１．１８ｍｍ目のふるいで分け、その粒度の比率を投入比率と比較した。その際、単位時間当たりの排出量を質量計量し、１時間当たりの搬送量として比較した。表１はその結果である。
【００２９】
【表１】

【００３０】
表１の測定値より、混合比率は、装置運転の３０秒後において投入比率とほぼ同じになり、９０秒以降は実質的に一定となることが判明した。これにより、２種の投入物を混合してもその混合状態が安定していることを検証した。
また、搬送量そのものも実質的に一定であり、定量搬送されていることも確認できた。
【００３１】
実施例２（混合効果の判定）
実施例１において定量搬送、混合比率の安定は確認できたが、その混合度合い（目視ではよく混ざっている）と吹付けして得られる耐火物の物性を調べるため、以下のような実験を行った。
１）試験材料：以下の粒度および成分組成を有する吹付け耐火材。
粒度Ａおよび粒度Ｂの割合は、実施例１と同じそれぞれ４０％および６０％である。

２）試験廃材（廃材）：
使用済み耐火物を破砕して得られる、成分組成が粒度Ａとほぼ同じである粒度１．１８ｍｍ〜５ｍｍの廃材。
【００３２】
（試験方法）
吹付け圧力、機械の回転数を同一条件に設定した吹付け機を用いてサンプル１はそのまま吹付けし、サンプル２、３は吹付け機への搬入に本発明の装置を用い、サンプル２は廃材投入比率１５％、サンプル３は廃材投入比率３０％でそれぞれ廃材を混入して吹付け、３種の物性測定ピースを採取した。このテストピースは、縦４００ｍｍ×横４００ｍｍ×深さ１００ｍｍの箱に吹付け、乾燥硬化後に縦１６０ｍｍ×横４０ｍｍ×高さ４０ｍｍのテストピースを切り出した。採取した各ピースについて、物性（嵩密度、線変化率、曲げ強度および見掛け気孔率）を調査した。その結果は、表２の通りである。
【００３３】
【表２】

【００３４】
表２より、サンプル１の吹付け耐火材の一部を廃材によりそれぞれ１５％および３０％置き換えたサンプル２および３は、廃材を添加しないサンプル１にほぼ近い物性を示していた。
この物性値が近い値となったことは、廃材の混入された吹付け耐火材が吹付け用耐火材として、実用可能であることを示しており、吹付け耐火材と廃材の混合状態も吹付け耐火材（オリジナル）と同等であることが確認された。
実施例１および実施例２より、本発明が実際の乾式吹付けに適用できることが裏付けられた。
【００３５】
【発明の効果】
本発明によれば、吹付け耐火材の材料投入用ホッパーに粒度の異なる２以上の吹付け耐火材を一定の投入比率で供給する機能を付加することにより、材料投入用ホッパーから供給される前記吹付け耐火材を、混合搬送手段で搬送する間に均一に混合し吹付け機に連続的に供給できる。これにより次の効果が得られる。
１）既存の耐火材搬送装置の材料投入用ホッパーに仕切板を設けることで、粒度の異なる２以上の吹付け耐火材を、これまでの搬送用フィーダーで搬送する間に混合できるので、粒度の異なる２以上の吹付け耐火材を一定の割合で混合した状態で乾式吹付けの吹付け機に連続的に供給できる。
２）既存の耐火物搬送装置に軽微な改善を加えるのみで、搬送装置から混合搬送手段に機能追加できるので、新たに装置の場所もいらず経済的である。
３）材料投入用ホッパーに可動式仕切板を設けることにより、投入材料の粒度、比重等に合わせて所望の混合比率が容易に得られる。
４）２以上の吹付け耐火材を材料投入用ホッパーに投入するための二次供給手段を付設することにより、吹付け耐火材の供給管理が簡単となるので、混合割合の安定と作業の効率化が図れるとともに、前記二次供給手段を材料投入用ホッパーの上方に設置できるので、装置自体の専有面積はそれほど広くならない。
５）粒度の異なる吹付け耐火材を均一に混合・供給できることにより、乾式吹付けの吹付け耐火材として廃材が利用できるので、例えば廃材を骨材として利用するなどの有効活用が図れる。
【図面の簡単な説明】
【図１】本発明の実施例に関わる吹付け耐火材の混合供給装置の側面図。
【図２】図１の混合供給装置の正面図。
【図３】図１の混合供給装置の平面図。
【図４】本発明の他の実施例における供給用スクリューフィーダー部の部分的断面説明図。
【図５】本発明のさらに他の実施例における供給用スクリューフィーダー部の部分的断面説明図。
【符号の説明】
１：材料投入用ホッパー
２：混合搬送手段
３：搬送用スクリューフィーダー
４：仕切板
５：モーター
６、７：プーリー
８：ベルト
９：モーター
１０：出口
１１：基台
１２：吹付け耐火材投入用ホッパー
１３：供給用スクリューフィーダー
１４、１８：プーリー
１６：ベルト
１７：モーター
１９：廃材投入用ホッパー
２０：供給用スクリューフィーダー
２１：吹付け機
２２：車輪
２３、２５：ホッパー
２４、２６：供給用スクリューフィーダー
２７：攪拌手段[0001]
BACKGROUND OF THE INVENTION
The present invention provides a spray refractory material that can be easily supplied to a sprayer while mixing two or more spray materials having different particle sizes at an arbitrary ratio at a site where the spray refractory material is used. The present invention relates to a mixing supply apparatus and a spraying method using the same.
[0002]
[Prior art]
In recent years, as one of the processing methods of used bricks and refractory materials (hereinafter referred to as used refractories) generated in factories, etc., the used refractories are crushed and used to adjust the particle size. In the case of wet spraying in which refractory material mixed in the cast refractory material or premixed refractory material is sprayed, this waste material is put into the mixer and mixed with the refractory material to effectively reuse it. . In the case of wet spraying, a large mixer is prepared, and by using such a mixer, waste materials can be easily mixed in mixer kneading.
[0003]
However, dry powder materials such as castable refractory materials that are dried and continuously sprayed with a certain amount of water added by a spraying machine are not normally prepared for a mixer. Even when trying to do so, the refractory material and the waste material cannot be mixed uniformly. When trying to apply waste materials to dry-type fireproof refractories, weigh each specified amount in advance, then put it into a mixing device such as a paddle mixer, mix it for a certain period of time, discharge it, convey it by belt conveyor or manually by scoop It must be supplied to the sprayer intermittently. That is, in order to mix waste materials and use them as spray fireproof materials, three new steps are required: mixing, transport, and injection into a spraying machine. For this reason, the present condition is that the waste material is not applied to a spraying refractory material in dry spraying.
[0004]
[Problems to be solved by the invention]
As mentioned above, in the dry spraying of refractory materials, waste materials are mixed with spray refractory materials and reused as spray refractory materials. Means for transporting to the spraying machine, and third means for feeding the mixed fireproof material into the spraying machine.
[0005]
For this reason, it is not only a very complicated operation, but each of these means is generally implemented as a single operation, and thus requires a plurality of devices and manpower for operating these devices. Furthermore, a large space is required for installation of the devices that realize each means, and there is a problem that the efficiency is extremely poor when waste materials are used for dry spraying.
[0006]
The present invention can use an existing sprayed refractory material conveying device (for example, a pre-dampener) for mixing waste materials, and can use two or more sprayed refractory materials having different particle size distributions such as sprayed refractory materials and waste materials. It is an object of the present invention to provide an apparatus for continuously mixing and supplying at a ratio and a spraying method using the apparatus.
[0007]
[Means for solving the problems]
The present invention has been made in order to achieve the above-described object, and includes a material charging hopper that supplies two or more spray refractory materials having different particle sizes at a certain ratio, and a spray refractory material from the material charging hopper. comprising a mixing conveying means mixing during the transport, continuously supplied can mix supplied the two or more spraying refractory material spraying device is mixed in the mixing conveying means from the material charging hopper A feeding device, wherein the inside of the material charging hopper is partitioned by a partition plate, the spraying refractory material charging ratio is adjusted by the partition plate, and the mixture feeding means is supplied at the charging ratio. This is a mixed supply device for sprayed refractory material. Further, the present invention provides a spraying machine installed at the outlet of the mixing and conveying means of the mixing and supplying apparatus, and continuously supplies the mixed sprayed refractory material to the spraying machine by the mixing and conveying means. It is a spraying method of the spraying refractory material characterized by spraying with a machine.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, among two or more sprayed refractory materials to be mixed, one is a powder of a castable refractory material used in dry spraying, and the other is a refractory having a particle size different from that of the castable refractory material. It is a material. A typical example of the refractory material is a waste material (a used refractory is crushed and the particle size is adjusted as necessary), but is not limited thereto. In the present specification, the particle size is a general term for a certain range obtained by classification means such as sieving.
[0009]
The waste material is a crushed used refractory material generated in a factory or the like, and functions as an aggregate when mixed in a castable refractory material. At the same time, there is a great advantage that the used refractory can be effectively utilized by reusing this waste material. In this case, the particle size of the waste material is suitably 20 mm or less, and particularly preferably within the range of 1 mm to 5 mm. If the particle size is smaller than 1 mm, it is difficult to obtain the effect as an aggregate, and it does not positively exclude the mixing of waste materials finer than 1 mm. Therefore, mixing of waste materials finer than 1 mm is allowed. On the other hand, when the particle size exceeds 20 mm, not only is it difficult to mix, but there is a possibility that the sprayability and moldability may be impaired.
[0010]
In the present invention, the material feeding hopper and the refractory material transport device in the existing dry spraying can be used. In particular, the refractory material conveying device is not improved or changed at all, and can be used as it is as a mixing and conveying means. Further, the material charging hopper can be used by providing means for supplying two or more sprayed refractory materials to the mixing and conveying means at a constant charging ratio. As this means, the most common one is a partition plate, and particularly preferred is a movable partition plate. This partition plate divides the inside of the material charging hopper into a plurality of areas, and moves the partition plate in the lateral direction to adjust the amount of the refractory material delivered from each area, thereby spraying two or more sprays. It has the function of continuously supplying refractory material to the mixing and conveying means at a constant input ratio. As a means other than the partition plate, a device for supplying two or more sprayed refractory materials to a material charging hopper or a mixing and conveying means at a constant rate can be used.
[0011]
Next, according to the present invention, the present invention uses an existing spray refractory material transport device in dry spraying to mix and supply two spray refractory materials (spray refractory material and waste material) having different particle sizes according to the drawings. explain.
[0012]
FIG. 1 is a side view of the sprayed refractory material mixing and supplying apparatus (this apparatus) in this example, FIG. 2 is a front view of this apparatus, and FIG. 3 is a plan view, both of which are schematically displayed. A part is shown in cross section. The main part of this apparatus is a material feeding hopper 1 for putting a spraying refractory material, and a mixing transport means 2 (mixing transport) for continuously transporting the spraying refractory material supplied from the material feeding hopper 1 while mixing. Screw feeder).
[0013]
The material charging hopper 1 and the mixing and conveying means 2 can supply the sprayed refractory material in the material charging hopper 1 to the mixing and conveying means 2 by a conveying screw feeder 3 provided at the lower part of the material charging hopper 1. In addition, it is attached to the base 11.
[0014]
That is, the material feeding hopper 1 is provided with a conveying screw feeder 3. The material feeding hopper 1 is rotated by rotating the conveying screw feeder 3 through the

pulleys

6, 7 and the belt 8 with the motor 5. The sprayed refractory material inside is continuously discharged into a rubber trough (not shown) surrounding the mixing and conveying means 2. When the mixing and conveying means 2 is rotated by the motor 9, the sprayed refractory material is conveyed toward the downstream while being uniformly mixed, and continuously from the outlet 10 (FIG. 2) of the mixing and conveying means 2 to the spraying machine 21. To be supplied. In addition, the main part of this apparatus demonstrated above and its related apparatus can utilize the existing blowing refractory material conveying apparatus substantially except the partition plate 4 installed in the material injection | throwing-in hopper 1, and the mixing conveyance means 2 For example, an existing one such as a pre-dampener can be used as it is.
[0015]
In this apparatus, as shown in FIGS. 1 and 2, a partition plate 4 is provided inside the material charging hopper 1, and the material charging hopper 1 is partitioned into two areas A and B. Area A is an area for placing a conventional castable spray refractory material, and area B is an area for placing waste material. The partition plate 4 is movable in the lateral direction (arrow direction in FIG. 3) and includes a mixing ratio variable mechanism that adjusts the supply amount of the refractory material and the waste material respectively charged in the areas A and B to a certain ratio. . By moving the installation position of the partition plate 4 by this mechanism and changing the area ratio of the opening that falls into the conveying screw feeder 3, the charging ratio of the refractory material and the waste material can be arbitrarily changed. Once the charging ratio is set, the refractory material and the waste material can always be fed to the mixing and conveying means 2 at the set charging ratio.
[0016]
In this apparatus, as a preferred embodiment, a secondary supply means for sprayed refractory material and waste material is installed above the material feeding hopper 1. That is, as clearly shown in FIG. 1 and FIG. 3, a secondary supply means for the sprayed refractory material is provided above the area A of the material charging hopper 1. This secondary supply means includes a spray refractory material charging hopper 12 and a supply screw feeder 13. By rotating the supply screw feeder 13 with a motor 17 through

pulleys

14 and 18 and a belt 16, The attached refractory material can be continuously or intermittently charged into the area A of the material charging hopper 1.
[0017]
On the other hand, a secondary supply means for waste material is provided above the area B of the material charging hopper 1. Similarly, this apparatus also comprises a waste material feeding hopper 19 and a supply screw feeder 20, and although not shown, the supply screw feeder 20 is rotated by a motor to continuously dispose the waste material in the area B of the material charging hopper 1. It can be turned on or off intermittently.
[0018]
Since the spraying refractory material and waste material can be supplied to the areas A and B divided into two parts of the material charging hopper 1 by using the transport function of each of these secondary supply means, supply management of the spray refractory material This makes it easier to stabilize the input ratio and increase work efficiency.
[0019]
Next, the operation in the case of using the present apparatus to mix the sprayed refractory material and the waste material at a constant input ratio and dry spraying will be described. First, this apparatus is moved to the position of the spraying machine 21 using the wheels 22, and the inclination angle of the mixing and conveying means 2 is adjusted so that the outlet 10 of the mixing and conveying means 2 matches the height of the spraying machine 21. In this state, the apparatus is fixed by a support leg (not shown) provided on the base 11.
[0020]
Subsequently, the sprayed refractory material injection hopper 12 of the secondary supply means of the spray refractory material is supplied with the powdered spray refractory material, and the waste material input hopper 19 of the secondary supply means of waste material is provided with the refractory material. Each waste material with a grain size larger than that of the material is introduced. The partition plate 4 of the material charging hopper 1 is moved laterally in accordance with the mixing ratio of the spraying refractory material and waste material, and the supply amounts of the spraying refractory material and waste material from the material charging hopper 1 are adjusted in advance. . Next, the

supply screw feeders

13 and 20 of each secondary supply means are rotated to supply the sprayed refractory material to the area A of the material input hopper 1 and the waste material to the area B of the material input hopper 1, respectively. Further, the spraying fire feeder 3 and the waste material are continuously supplied to the mixing / conveying means 2 at a constant rate by the conveying screw feeder 3.
[0021]
The supplied refractory material and waste material are uniformly mixed while being conveyed by the mixing and conveying means 2 and are continuously supplied from the outlet 10 to the blowing machine 21. And in this spraying machine 21, a fixed ratio of water | moisture content is added, and it sprays continuously as a spraying refractory material which mixed the waste material. If necessary, an appropriate amount of water may be added to the sprayed refractory material being transported in order to prevent dust from being scattered in the mixing transport means 2.
[0022]
Although the preferred embodiments of the present invention have been described above, the present invention can be modified within a range in which the above-described object can be achieved. For example, when the fire refractory material and the waste material are supplied from the material feeding hopper 1 to the mixing and transporting means 2 by the transport screw feeder 3 as in the present apparatus, the spray fire and fire resistance are also transported by the transport screw feeder 3. This is preferable because the material and the waste material are mixed. However, it may be conveyed by a conveying means other than the conveying screw feeder 3 or may be supplied directly from the material charging hopper 1 to the mixing and conveying means 2 without using the conveying means.
[0023]
4 and 5 illustrate other embodiments of the present invention. That is, FIG. 4 shows that the sprayed refractory material and waste material respectively contained in the

hoppers

23 and 25 equipped with the supply amount adjustment function are directly transferred to the screw feeder 3 for conveyance using the

screw feeders

24 and 26 for supply. It is supplied continuously at an input ratio. Therefore, in this case, the

hoppers

23 and 25 become material charging hoppers.
[0024]
FIG. 5 shows that the material injection hopper 1 is not provided with a partition plate 4 for adjusting the injection ratio of the sprayed refractory material and the waste material, and the

hoppers

23 and 25 equipped with the supply amount adjustment function as in FIG. This is an example to achieve. In other words, using the

supply screw feeders

24 and 26, the refractory material and waste material are sprayed from the

hoppers

23 and 25 into the material charging hopper 1 at a constant charging ratio, and uniform, for example, by the stirring means 27 as required. Then, it is supplied to the screw feeder 3 for conveyance. As a result, the blowing refractory material and the waste material supplied from the material charging hopper 1 to the conveying screw feeder 3 have a constant charging ratio.
[0025]
Furthermore, this invention increases the supply amount adjustment means of each spraying refractory material according to the number of the spraying refractory materials to mix also with respect to the mixing conveyance means of three or more spraying refractory materials from which a particle size differs. Can be applied similarly. Moreover, although waste material is the most common thing to mix with a spray refractory material, you may mix things other than waste material.
[0026]
【Example】
As shown in FIG. 1, secondary supply means (12 and 13, and 19 and 20) are attached to the existing refractory material transfer device (2535L × 1430W × 1580H pre-dampener), and the partition plate 4 is attached to the material charging hopper 1. The apparatus of the present invention (2535L × 2000W × 1700H) was prepared, and the following experiment was performed.
[0027]
Example 1 (quantitative conveyance and determination of mixing accuracy)
When two types of inputs with different particle sizes are mixed and transported by the apparatus of the present invention, the relationship between the input ratio and the mixing ratio, the degree of stabilization of the mixing ratio, and the transport of the conventional sprayed refractory only Whether or not quantification of the amount could be obtained was determined by the following method.
1) Test material: A spray refractory material composed of the following particle sizes.
Particle size A (1.18mm or more) 40%
Particle size B (less than 1.18mm) 60%
2) Test waste: particle size 1.18-5 mm.
[0028]
(Test method)
The particle size A was removed from the test material, and this was used as a waste material addition support material. The partition plate 4 was set in accordance with the set mixing ratio of the test waste material, and the waste material addition-compatible material and the test waste material were loaded into the spray refractory material charging hopper 12 and the waste material charging hopper 19 respectively, and the apparatus of the present invention was operated. . Samples discharged from the mixing / conveying means, that is, the mixing / conveying screw feeder 2, are sampled every 30 seconds, and the waste added material and test waste contained in the sample are separated by a 1.18 mm sieve, and the ratio of the particle sizes is input. Compared with the ratio. At that time, the discharge amount per unit time was weighed and compared as the transport amount per hour. Table 1 shows the results.
[0029]
[Table 1]

[0030]
From the measured values in Table 1, it was found that the mixing ratio became substantially the same as the charging ratio 30 seconds after the operation of the apparatus, and became substantially constant after 90 seconds. As a result, it was verified that the mixed state was stable even when the two kinds of inputs were mixed.
Moreover, the conveyance amount itself was substantially constant, and it was confirmed that it was being conveyed quantitatively.
[0031]
Example 2 (Determination of mixing effect)
In Example 1, the quantitative conveyance and the stability of the mixing ratio could be confirmed, but the following experiment was conducted in order to investigate the physical properties of the refractory obtained by spraying the degree of mixing (mixed well visually). It was.
1) Test material: A spray refractory material having the following particle size and composition.
The ratios of the particle size A and the particle size B are 40% and 60%, respectively, as in Example 1.

2) Test waste (waste material):
Waste material obtained by crushing a used refractory and having a particle size of about 1.18 mm to 5 mm, whose component composition is almost the same as that of the particle size A.
[0032]
(Test method)
Sample 1 is sprayed as it is using a spraying machine in which the spraying pressure and the number of rotations of the machine are set to the same conditions.

Samples

2 and 3 use the apparatus of the present invention for carrying into the spraying machine. The waste material input ratio was 15% and Sample 3 was waste material input ratio of 30%. The waste material was mixed and sprayed, and three types of physical property measurement pieces were collected. This test piece was sprayed on a box of length 400 mm × width 400 mm × depth 100 mm, and after drying and curing, a test piece of length 160 mm × width 40 mm × height 40 mm was cut out. Each collected piece was examined for physical properties (bulk density, linear change rate, bending strength, and apparent porosity). The results are shown in Table 2.
[0033]
[Table 2]

[0034]
From Table 2,

Samples

2 and 3 in which a part of the sprayed refractory material of Sample 1 was replaced by 15% and 30%, respectively, showed properties almost similar to Sample 1 in which no waste material was added.
The fact that the physical property values are close indicates that the sprayed refractory material mixed with waste material is practical as a refractory material for spraying, and the mixed state of sprayed refractory material and waste material is also blown. It was confirmed that it was equivalent to the attached refractory material (original).
From Example 1 and Example 2, it was confirmed that the present invention can be applied to actual dry spraying.
[0035]
【The invention's effect】
According to the present invention, by adding a function of supplying two or more spray refractory materials having different particle sizes at a constant input ratio to the material input hopper of the spray refractory material, the above-mentioned material supplied from the material input hopper The sprayed refractory material can be uniformly mixed while being transported by the mixing transport means and continuously supplied to the spraying machine. As a result, the following effects can be obtained.
1) By providing a partition plate in the material input hopper of the existing refractory material transport device, two or more sprayed refractory materials having different particle sizes can be mixed while being transported by the conventional transport feeder. Two or more different spraying refractory materials can be continuously supplied to a dry-type spraying machine in a state where they are mixed at a certain ratio.
2) Since a function can be added to the mixing and conveying means from the conveying device only by making minor improvements to the existing refractory conveying device, it is economical without requiring a new device.
3) By providing a movable partition plate in the material charging hopper, a desired mixing ratio can be easily obtained in accordance with the particle size, specific gravity and the like of the charging material.
4) By providing a secondary supply means for feeding two or more sprayed refractory materials into the material hopper, supply management of the sprayed refractory materials becomes simple, so the mixing ratio is stable and work efficiency is improved. In addition, since the secondary supply means can be installed above the material feeding hopper, the exclusive area of the apparatus itself is not so large.
5) Since the sprayed refractory materials having different particle sizes can be mixed and supplied uniformly, the waste material can be used as a spray refractory material for dry spraying. For example, the waste material can be used effectively as an aggregate.
[Brief description of the drawings]
FIG. 1 is a side view of a mixed supply device for sprayed refractory material according to an embodiment of the present invention.
FIG. 2 is a front view of the mixing and feeding apparatus of FIG.
FIG. 3 is a plan view of the mixing / feeding apparatus of FIG. 1;
FIG. 4 is a partial cross-sectional explanatory view of a supply screw feeder in another embodiment of the present invention.
FIG. 5 is a partial cross-sectional explanatory view of a supply screw feeder portion in still another embodiment of the present invention.
[Explanation of symbols]
1: Material feeding hopper 2: Mixing / conveying means 3: Conveying screw feeder 4: Partition plate 5: Motor 6, 7: Pulley 8: Belt 9: Motor 10: Outlet 11: Base 12: For blowing fireproof material Hopper 13: Supply screw feeder 14, 18: Pulley 16: Belt 17: Motor 19: Waste material charging hopper 20: Supply screw feeder 21: Sprayer 22: Wheel 23, 25: Hopper 24, 26: Supply screw Feeder 27: Stirring means

Claims

A material charging hopper for supplying two or more sprayed refractory materials of different particle sizes at a certain ratio and a mixing and conveying means for mixing while transporting the sprayed refractory material from the material charging hopper are provided. A mixing and feeding device capable of mixing the two or more sprayed refractory materials supplied from the hopper for use with the mixing and conveying means and continuously supplying the mixture to the sprayer , wherein the material feeding hopper includes a partition plate A spraying refractory material mixing / feeding apparatus, characterized in that the spraying refractory material is supplied to the mixing / conveying means at a charging ratio adjusted by the partition plate.

The mixed supply apparatus of the spraying refractory material of Claim 1 provided with the secondary supply means which each supplies two or more spraying refractory materials from which a particle size differs to the material injection | throwing-in hopper.

A spraying machine is installed at the outlet of the mixing and conveying means of the mixing and feeding device according to claim 1 or 2, and the mixed spraying refractory material is continuously supplied to the spraying machine by the mixing and conveying means. A spraying method for sprayed refractory material, characterized by spraying with an attaching machine.

Spray method spraying a refractory material is crushed spent refractory, spraying refractory material according to claim 3, wherein the waste material with an adjusted particle size.

The method for spraying a sprayed refractory material according to claim 4, wherein the particle size of the waste material is 20 mm or less.