JP3226821B2 - Hollow granule mold flux manufacturing equipment - Google Patents
Hollow granule mold flux manufacturing equipmentInfo
- Publication number
- JP3226821B2 JP3226821B2 JP01599697A JP1599697A JP3226821B2 JP 3226821 B2 JP3226821 B2 JP 3226821B2 JP 01599697 A JP01599697 A JP 01599697A JP 1599697 A JP1599697 A JP 1599697A JP 3226821 B2 JP3226821 B2 JP 3226821B2
- Authority
- JP
- Japan
- Prior art keywords
- drying tower
- hot air
- nozzle
- mold flux
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000004907 flux Effects 0.000 title claims description 46
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000008187 granular material Substances 0.000 title claims description 7
- 238000001035 drying Methods 0.000 claims description 71
- 239000002002 slurry Substances 0.000 claims description 41
- 239000002994 raw material Substances 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 6
- 238000007602 hot air drying Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005058 metal casting Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鋼の連続鋳造に使
用される中空顆粒モールドフラックスの製造装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a hollow granular mold flux used for continuous casting of steel.
【０００２】[0002]
【従来の技術】例えば、鋼の連続鋳造時に鋳型内に添加
するモールドフラックスは種々の役割を担っている。す
なわち、鋳造される溶鋼表面を保温すること、鋳型
内溶鋼表面の酸化防止および浮上する介在物を迅速溶解
すること、鋳型と鋳片間の潤滑をつかさどること、
鋳片より最適な抜熱量をコントロールすることなどの働
きを課せられている。2. Description of the Related Art For example, mold flux added to a mold during continuous casting of steel plays various roles. In other words, to keep the surface of the molten steel to be cast warm, to prevent oxidation of the molten steel surface in the mold and to quickly dissolve the floating inclusions, to control the lubrication between the mold and the slab,
Tasks such as controlling the optimal heat removal from the slab are imposed.
【０００３】モールドフラックス（以下、単にフラック
スと称す）のこれらの作用によって鋳片の表面欠陥をな
くし、美麗な鋳肌を形成できる効果を有し、特に連続鋳
造操業の鋳込作業の安定性の確保と、鋳片鋳造歩留り向
上を図るためには必要不可欠なものである。[0003] These effects of mold flux (hereinafter simply referred to as "flux") have the effect of eliminating the surface defects of the slab and forming a beautiful casting surface, and in particular, the stability of the casting operation in the continuous casting operation. This is indispensable for securing and improving the yield of slab casting.
【０００４】フラックスは、通常粉体あるいは顆粒（中
空顆粒を含む）状であり、その成分は一般にＣａＯ，Ｓ
ｉＯ2 を主成分とし、他にＡｌ2 Ｏ3 、アルカリ土類金
属およびアルカリ金属の化合物（酸化物、炭酸塩、弗化
物等）を加えてなるものであり、溶融温度、粘度等を調
整し、さらに、溶融速度を調整するためにカーボンを添
加してフラックス組成が構成されており、顆粒状の場合
は、有機、無機質のバインダー等が用いられ一定の形状
を保持している。The flux is usually in the form of powder or granules (including hollow granules), and its components are generally CaO, S
It is made of iO 2 as a main component, and in addition to Al 2 O 3 , a compound of an alkaline earth metal and an alkali metal (oxide, carbonate, fluoride, etc.). Further, a flux composition is formed by adding carbon in order to adjust the melting rate. In the case of a granular form, an organic or inorganic binder or the like is used to maintain a certain shape.
【０００５】しかして、中空顆粒状フラックスの製造と
しては、上記組成を含有する原料フラックスに水を適量
に混合し、水性のスラリー状となしこれを熱風乾燥塔
（室）内にノズルから噴霧し、熱風に曝すことにより乾
燥して適度の粒度をもつ製品フラックスを得ている。[0005] In order to produce a hollow granular flux, a raw material flux containing the above composition is mixed with an appropriate amount of water to form an aqueous slurry, which is sprayed from a nozzle into a hot air drying tower (chamber). It is dried by exposure to hot air to obtain a product flux having an appropriate particle size.
【０００６】このようなフラックスの製造方法の公知技
術としては、特公平３−７９１００号公報が開示されて
いる。この技術の要旨は、炭素質粉末と金属鋳造用の融
剤成分とが含まれた水性スラリーを作り、水性スラリー
をスプレー乾燥して水を蒸発させ、水の蒸発が固体部分
を含んだ粒子を生成し、粒子内では固体部分の全体にわ
たって炭素質粉末が分散して含まれており、固体部分内
では粒子の表面における炭素質粉末の割合が、粒子全体
における炭素質粉末の割合よりも大きくなっていること
を特徴としている。As a known technique of such a method for producing a flux, Japanese Patent Publication No. 3-79100 is disclosed. The gist of this technology is that an aqueous slurry containing a carbonaceous powder and a flux component for metal casting is made, and the aqueous slurry is spray-dried to evaporate water. Generated, and the carbonaceous powder is dispersed and contained throughout the solid portion in the particle, and the ratio of the carbonaceous powder on the surface of the particle in the solid portion is larger than the ratio of the carbonaceous powder in the entire particle. It is characterized by having.
【０００７】該公報には特に製造装置については触れら
れていないが、上記の金属鋳造用融剤の製造方法によれ
ば、スプレー乾燥は水性スラリーを供給ポンプにより噴
霧器から霧状の粒子として分散させ、分散物を空気加熱
から供給される熱風に乗せて乾燥室内を降下させ、降下
の間に粒子を熱風で加熱し、粒子内の水分を瞬間的に蒸
発させて、粒子内に空隙を形成させると共に粒子を乾燥
して、多孔構造の球形粒子を得、こうして得た粒子を熱
風と共にサイクロンに導き、ここで製品と熱風とを分離
して目的とする融剤を得ると記述されている。Although the publication does not specifically mention a production apparatus, according to the above-described method for producing a flux for metal casting, spray drying involves dispersing an aqueous slurry as atomized particles from a sprayer by a supply pump. Then, the dispersion is put on the hot air supplied from the air heating and lowered in the drying chamber, and during the descent, the particles are heated with the hot air to instantaneously evaporate the moisture in the particles to form voids in the particles. In addition, it is described that the particles are dried to obtain spherical particles having a porous structure, and the particles thus obtained are introduced into a cyclone together with hot air, where the product and the hot air are separated to obtain a desired flux.
【０００８】[0008]
【発明が解決しようとする課題】上記特公平３−７９１
００号でのフラックス製造技術は、熱風乾燥室へのフラ
ックスの原料スラリー供給と乾燥用熱風の供給は、前記
乾燥室の上方から同一方向へ向けて放出するいわゆる併
流方式を用いている。このような方式においては熱風に
曝されている時間を長時間必要とする関係上、乾燥室の
規模を大きくする必要があり、設備的に費用が多くかか
る。また、添付された図面からみる限り単一ノズルから
のスラリー噴出を行っており、スラリーのノズル詰り等
の対策については特に触れていない。Problems to be Solved by the Invention Japanese Patent Publication No. 3-791
In the flux production technique of No. 00, the so-called co-current method in which the raw material slurry supply of the flux and the supply of the drying hot air to the hot air drying chamber are discharged in the same direction from above the drying chamber is used. In such a method, since the time required for exposure to hot air is required for a long time, it is necessary to increase the scale of the drying room, which requires a large facility. Further, as seen from the attached drawings, the slurry is ejected from a single nozzle, and no countermeasures such as nozzle clogging of the slurry are mentioned.
【０００９】本発明の対象とするフラックスの原料スラ
リーは、前記したように、水中に固体粒子が懸濁した状
態で、かつ所定量のバインダーが配合された流体であ
る。この固体粒子は所定の粒径、例えば、０．３ｍｍ以
下に微粉砕された微粒子であるが、不可避的に管理外の
粗粒の混在が避けられないことに起因して、しばしばノ
ズル詰まりを発現する。The flux slurry of the object of the present invention is, as described above, a fluid in which solid particles are suspended in water and a predetermined amount of a binder is blended. These solid particles are fine particles finely pulverized to a predetermined particle size, for example, 0.3 mm or less, but often cause nozzle clogging due to inevitably inevitable mixing of uncontrollable coarse particles. I do.
【００１０】このノズル詰まりはその都度操業停止をま
ねき、生産性を著しく阻害するので、より経済的な他の
手段によって操業停止を排除することが望まれていた。
このようなスラリーの熱風乾燥においては、上記したよ
うな問題点を有しており、本発明はこのような問題点を
解決するためになされたもので、フラックス製造に際し
て、最適な製造装置を提供することを目的とする。[0010] Since this nozzle clogging causes a shutdown every time and significantly impairs productivity, it has been desired to eliminate the shutdown by other more economical means.
The hot air drying of such a slurry has the above-mentioned problems, and the present invention has been made to solve such problems, and provides an optimum manufacturing apparatus for flux production. The purpose is to do.
【００１１】[0011]
【課題を解決するための手段】本発明は上記問題を解決
するために下記の手段をとるものである。 （１） モールドフラックスの原料スラリーを蒸発乾燥
する装置であって、熱風供給源からの熱風を搬送する熱
風搬送管を、円筒状の乾燥塔の頂部に接続し、さらに、
原料スラリーを乾燥塔内に噴射する複数個のランスノズ
ルを、前記乾燥塔の側壁を貫通させ、乾燥塔直胴部内で
点対称に、かつ、ノズルを上向き傾斜をもたせて着脱自
在に配設すると共に、前記乾燥塔直胴部の下方には製品
フラックスと、乾燥済み熱風の排気とを分別して排出す
る熱風排気部と、モールドフラックス製品貯留切り出し
部とにより構成したことを特徴とする中空顆粒モールド
フラックスの製造装置。The present invention adopts the following means in order to solve the above problems. (1) An apparatus for evaporating and drying a raw material slurry of a mold flux, wherein a hot-air conveying pipe for conveying hot air from a hot-air supply source is connected to the top of a cylindrical drying tower.
A plurality of lance nozzles for injecting the raw material slurry into the drying tower are penetrated through the side wall of the drying tower, point-symmetrically arranged in the straight body of the drying tower, and disposed detachably with the nozzle inclined upward. A hollow granule mold comprising a product flux, a hot air exhaust portion for separating and discharging dried hot air exhaust, and a mold flux product storage cutout portion below the drying tower straight body portion. Flux manufacturing equipment.
【００１２】（２） 乾燥塔の頂部に熱風を下向きに、
かつ、均等分配するセパレータ板を設けたことを特徴と
する（１）記載の中空顆粒モールドフラックスの製造装
置。 （３） 乾燥塔内に送風する熱風の一部を熱風搬送管よ
り分岐させ、乾燥塔頂部下方近傍で、かつ、該乾燥塔に
対して接線方向に熱風分岐管を設置したことを特徴とす
る（１）または（２）記載の中空顆粒モールドフラック
スの製造装置。(2) Hot air is directed downward at the top of the drying tower.
The hollow granule mold flux producing apparatus according to (1), further comprising a separator plate that is evenly distributed. (3) A part of the hot air blown into the drying tower is branched from the hot air conveying pipe, and a hot air branch pipe is installed near the lower portion of the top of the drying tower and tangentially to the drying tower. An apparatus for producing a hollow granular mold flux according to (1) or (2).
【００１３】（４） 乾燥塔の側壁に設ける貫通孔の径
をランスノズル外径より大とし、該ランスノズルの乾燥
塔内挿入深さ位置に設けた湾曲状鍔部材を前記貫通孔に
嵌装固定することを特徴とする（１）ないし（３）のい
ずれかに記載の中空顆粒モールドフラックスの製造装
置。 （５） 乾燥塔内に配設する原料スラリーを乾燥塔内に
噴射する複数個のランスノズルを、乾燥塔の外周を囲繞
するスラリー供給用環状管の各枝管に遮断弁を設けて、
着脱自在に取付けたことを特徴とする（１）ないし
（４）のいずれかに記載の中空顆粒モールドフラックス
の製造装置。(4) The diameter of the through hole provided in the side wall of the drying tower is larger than the outer diameter of the lance nozzle, and a curved flange member provided at the insertion depth of the lance nozzle in the drying tower is fitted into the through hole. The apparatus for producing a hollow granular mold flux according to any one of (1) to (3), wherein the flux is fixed. (5) A plurality of lance nozzles for injecting the raw material slurry disposed in the drying tower into the drying tower, and a shutoff valve provided on each branch pipe of the slurry supply annular pipe surrounding the outer periphery of the drying tower,
The apparatus for producing a hollow granular mold flux according to any one of (1) to (4), wherein the apparatus is detachably attached.
【００１４】[0014]
【発明の実施の形態】本発明者らは従来技術の問題点に
鑑み、フラックス製造時のフラックス原料のスラリー
を、どのような形で熱風に曝せば理想に近い形で中空顆
粒状フラックスを効率よく得ることができるか種々検討
を重ねた結果、本発明の完成をみるに至った。BEST MODE FOR CARRYING OUT THE INVENTION In view of the problems of the prior art, the present inventors have proposed a method of exposing a slurry of a flux raw material at the time of flux production to hot air in any form to efficiently produce a hollow granular flux in a nearly ideal form. As a result of various studies as to whether or not it can be obtained well, the present invention has been completed.
【００１５】すなわち、原料スラリー（以下、単にスラ
リーと称す）と熱風との接触は、向流方式を採用するこ
とによって熱風乾燥塔を設備的にコンパクトな形にで
き、また、スラリーの噴出ノズルをマルチ方式にするこ
とによってノズル詰りが発生した場合、そのノズルのみ
を交換することによって、装置全体を休止せずに連続稼
働を継続することができる等、フラックスの有効な製造
装置を開発することができた。That is, the contact between the raw material slurry (hereinafter, simply referred to as slurry) and hot air can be achieved by adopting a counter-current method so that the hot air drying tower can be made compact in terms of equipment. In the event that nozzle clogging occurs due to the multi-method, it is possible to develop an effective flux production system, such as by replacing only that nozzle, allowing continuous operation without stopping the entire system. did it.
【００１６】以下、図１および図２に基づいて本発明の
特徴とその詳細を説明する。送風機（図示せず）より送
られてきた空気２は、熱風発生装置１によって重油また
は燃料ガスの燃焼熱によって加熱されて熱風となり、搬
送管３を通りスラリー４を向流乾燥する熱風乾燥塔（以
下、単に乾燥塔と称す）５の頂部から熱風が圧送され
る。該乾燥塔５は概ね截頭円錐形（水平面とのなす角度
約４５°）をした上部乾燥塔５ａと、円筒形（水平面と
のなす角度９０°）の直胴部からなる中部乾燥塔５ｂお
よび、逆截頭円錐形（水平面とのなす角度約６０°）の
下部乾燥塔５ｃより構成されている。The features and details of the present invention will be described below with reference to FIGS. The air 2 sent from a blower (not shown) is heated by the heat of combustion of heavy oil or fuel gas by the hot air generator 1 to become hot air, and passes through the conveying pipe 3 to dry the slurry 4 in a countercurrent direction. Hot air is sent under pressure from the top of the drying tower 5. The drying tower 5 has an upper drying tower 5a having a generally frustoconical shape (at an angle of about 45 ° with the horizontal plane), a middle drying tower 5b having a cylindrical body (at an angle of 90 ° with the horizontal plane), and , A lower drying tower 5c having an inverted frustoconical shape (at an angle of about 60 ° with the horizontal plane).
【００１７】該乾燥塔５の上部乾燥塔５ａの上方には、
セパレート板６を設置しており、該セパレート板６は熱
風搬送管（以下、単に搬送管と称す）３と乾燥塔５の頂
部との接続部において、搬送管３を流れてきた熱風２を
数個のセパレート板６によって均等に分配すると共に、
熱風２を下向に方向転換させる役目を担っている。Above the upper drying tower 5a of the drying tower 5,
A separate plate 6 is provided. The separate plate 6 is provided at the connecting portion between the hot air transfer pipe (hereinafter simply referred to as a transfer pipe) 3 and the top of the drying tower 5 to count the hot air 2 flowing through the transfer pipe 3. While being evenly distributed by the separate plates 6,
It is responsible for turning the hot air 2 downward.
【００１８】また、搬送管３より熱風２の一部を分岐
し、上部乾燥塔５ａの一部に熱風分岐管７を接線方向に
接続して熱風を供給する。かくすることにより、該熱風
には上部乾燥塔５ａの上壁内面および、中部乾燥塔５ｂ
の側壁内面を旋回しながら下方向に向う熱風旋回流２ａ
を付与することができる。このような構成をとることに
より、後述するノズル９より噴射されたスラリー４が粒
滴となって熱風との向流接触によって蒸発乾燥される過
程において、乾燥塔５の内壁に付着することを抑制防止
できる。Further, a part of the hot air 2 is branched from the transport pipe 3, and a hot air branch pipe 7 is connected to a part of the upper drying tower 5a in a tangential direction to supply hot air. In this way, the hot air is supplied to the inner surface of the upper wall of the upper drying tower 5a and the middle drying tower 5b.
Hot air swirling flow 2a turning downward while turning the inner surface of the side wall
Can be provided. By adopting such a configuration, it is possible to prevent the slurry 4 ejected from the nozzle 9 described later from being attached to the inner wall of the drying tower 5 in the process of becoming droplets and being evaporated and dried by countercurrent contact with hot air. Can be prevented.
【００１９】一方、前記中部乾燥塔５ｂの下部寄りに
は、スラリー４を吹込むために先端部にノズル９を有す
るランス１０が、乾燥塔外より側壁８を貫通して乾燥塔
内の所定位置に、ノズルが特定角度をもって上向きに設
置されている。ノズル数は乾燥塔の大きさにも関係して
くるが、概ね３〜１０本程度とし、マルチノズルタイプ
を構成する。On the other hand, a lance 10 having a nozzle 9 at a tip end for blowing the slurry 4 is provided at a predetermined position in the drying tower near the lower part of the middle drying tower 5b through the side wall 8 from outside the drying tower. The nozzle is installed upward at a specific angle. Although the number of nozzles depends on the size of the drying tower, the number is generally about 3 to 10 to constitute a multi-nozzle type.
【００２０】また、乾燥塔５ｂの側壁８に設ける貫通孔
の径はランスノズル外径より大とし、ランスノズルの挿
入を容易とする。さらに、ランスノズルの乾燥塔内挿入
深さの位置に応じて設けた乾燥塔５ｂの外壁の曲率に合
致する湾曲状鍔部材２１を前記貫通孔に嵌装することに
より、ノズル９をほぼ上向きに指向させた状態でランス
ノズルを固定することができる。The diameter of the through hole provided in the side wall 8 of the drying tower 5b is larger than the outer diameter of the lance nozzle to facilitate insertion of the lance nozzle. Further, by fitting a curved flange member 21 that matches the curvature of the outer wall of the drying tower 5b provided according to the position of the insertion depth of the lance nozzle in the drying tower into the through-hole, the nozzle 9 is turned substantially upward. The lance nozzle can be fixed in the oriented state.
【００２１】また図示しない攪拌処理装置で調製された
フラックスの原料であるスラリー４は、該乾燥塔５の側
壁の周囲を囲繞する環状管１１によって所定のスラリー
ヘッダー圧を保持し、各ランス１０へ均等にスラリー４
が供給できるよう構成され、かつ、各ランス１０のいず
れにも環状管１１との間に遮断弁が設置されており、そ
の上部にはランス１０を脱着できる接続部１２があり、
環状管１１との間で脱着自在に取付けられている。従っ
ていずれかのノズルにおいてノズル詰りが発生した場合
は、操業を停止することなく、そのランス１０のみをノ
ズル９と共に取替えることができる。The slurry 4, which is a raw material of the flux prepared by a stirring apparatus (not shown), maintains a predetermined slurry header pressure by an annular tube 11 surrounding the periphery of the side wall of the drying tower 5, and sends the slurry to each lance 10. Slurry 4 evenly
Is provided, and each of the lances 10 is provided with a shutoff valve between the lance 10 and the annular pipe 11, and a connection portion 12 capable of attaching and detaching the lance 10 is provided above the lance 10.
It is detachably attached to the annular pipe 11. Therefore, when nozzle clogging occurs in any one of the nozzles, only the lance 10 can be replaced together with the nozzle 9 without stopping the operation.
【００２２】また、ノズル９の配設位置は乾燥塔５内で
点対称としているため、該塔内において略均等にスラリ
ーが噴射され熱風との接触がムラなく行われる。さら
に、下部乾燥塔５ｃには熱風との熱交換により乾燥され
た、所定の大きさの球状の中空顆粒状フラックスが貯留
され、排出口部に設けた、例えば、ロータリーバルブに
よってほぼ連続的に切り出される。Further, since the disposition position of the nozzle 9 is point-symmetrical in the drying tower 5, the slurry is sprayed substantially evenly in the drying tower 5 and the contact with the hot air is performed evenly. Further, the lower drying tower 5c stores a spherical hollow granular flux having a predetermined size and dried by heat exchange with hot air, and is substantially continuously cut out by, for example, a rotary valve provided at an outlet. It is.
【００２３】さらにまた、下部乾燥塔５ｃの上方部には
スラリー４との熱交換済み熱風排気部（中空体）１３が
設けられており、排気ダクト１８に繋がっているので排
気を乾燥塔５外へ吸引排出するので、微細なフラックス
も排気と共に吸引されて室外に排出されるため、中空顆
粒状フラックスとしては微粒粉を含まない製品が得られ
る。Further, a hot air exhaust portion (hollow body) 13 which has exchanged heat with the slurry 4 is provided above the lower drying tower 5c, and is connected to an exhaust duct 18 so that exhaust air is supplied to the outside of the drying tower 5. Since the fine flux is sucked and discharged to the outside, the fine flux is also sucked together with the exhaust air and discharged to the outside, so that a product containing no fine powder can be obtained as the hollow granular flux.
【００２４】なお、図中１９はスラリーの送り出しを一
時中断する遮断弁で、１４はノズル９から噴出するスラ
リー４の状況を絶えず監視するための覗き窓であり、２
０は乾燥塔内を点検するための出入口である。In the drawing, reference numeral 19 denotes a shut-off valve for temporarily stopping the supply of the slurry, and reference numeral 14 denotes a viewing window for constantly monitoring the state of the slurry 4 ejected from the nozzle 9.
Reference numeral 0 denotes an entrance for checking the inside of the drying tower.
【００２５】前記ノズルから噴出したスラリーはノズル
からの噴霧圧力によって一定の高さまで熱風中を上昇し
ながら、上方から降下してくる熱風と向流熱交換し、さ
らに、反転下降する過程でも熱風と並流熱交換して乾燥
され水分を蒸発することにより中空顆粒フラックス製品
を形成する。The slurry ejected from the nozzle rises in the hot air to a certain height by the spray pressure from the nozzle and exchanges countercurrent heat with the hot air descending from above. The hollow granule flux product is formed by co-current heat exchange drying and evaporating the water.
【００２６】乾燥塔５内へスラリー４を噴出するに当っ
ては、本発明者らの経験によれば、単一ノズルではノズ
ル詰まりが発生した場合に装置全体の操業を停止せねば
ならない。また、単一ノズルに限らずノズル９の先端部
の一部にスラリーから生成した付着物（ダレ）が生じた
場合には、スラリーの噴射条件が変動するため、乾燥塔
５内でスラリー４の噴霧によって生成する粒滴が均一に
分布されずデッドゾーンができ、部分的に熱風との適正
な接触が阻害され、所定の短時間での蒸発乾燥が達成で
きなくなる。In spouting the slurry 4 into the drying tower 5, according to the experience of the present inventors, when a single nozzle is clogged, the operation of the entire apparatus must be stopped. In addition, when the deposit (drip) generated from the slurry is generated not only in the single nozzle but also in a part of the tip of the nozzle 9, the conditions for spraying the slurry are changed. The droplets generated by the spraying are not uniformly distributed, and a dead zone is formed, which partially hinders proper contact with hot air and makes it impossible to achieve evaporative drying in a predetermined short time.
【００２７】また、付着物（ダレ）のためノズル９から
のスラリー４の噴射方向が変わり、粒滴の飛翔方向が乾
燥塔５内壁に向かった場合、半乾燥の粒滴の付着という
好ましくない事態がおこる。さらに、ノズル詰まりを発
生したランスノズルを乾燥塔５内に放置しておくと塔５
内の高温雰囲気や高圧ポンプによる圧縮作用によってラ
ンスノズル内の原料スラリーが固化してしまい、修復不
能状態となる。In addition, when the direction of spraying the slurry 4 from the nozzle 9 changes due to deposits (dripping) and the flying direction of the droplets is directed to the inner wall of the drying tower 5, an undesired situation that semi-dry droplets adhere. Happens. Furthermore, if the lance nozzle that has caused nozzle clogging is left in the drying tower 5,
The raw material slurry in the lance nozzle is solidified due to the high temperature atmosphere in the inside and the compressing action of the high pressure pump, and the lance nozzle cannot be repaired.
【００２８】このような事態を避けるため、本発明にお
いてはマッチタイプのノズル配設をとるものであり、も
し仮りに数個のノズルのうち１個のノズルが上記現象を
惹起したとしても、乾燥塔内を覗く覗き窓１４からその
様子を逐次監視し、素早く対応することによってそのノ
ズルへのスラリー４の供給を停止し、該ノズル９をラン
ス１０と共に新しいノズルと交換することで、操業を停
止する必要はなく対処することができる。In order to avoid such a situation, a match type nozzle is provided in the present invention. Even if one of the several nozzles causes the above-mentioned phenomenon, the drying is performed. The operation is stopped by sequentially monitoring the situation from the viewing window 14 that looks into the tower, responding quickly and stopping the supply of the slurry 4 to the nozzle, and replacing the nozzle 9 with a new nozzle together with the lance 10. You don't have to.
【００２９】ノズル配設数８個の本発明装置で実際の操
業を行ってみたところ、製造開始より約１，５時間後の
監視によって１個のノズル先端部に付着物が発生し異常
噴霧が認められたので、操業を実行しながら付着物発生
ノズルのみについて、遮断弁１９によりスラリーの送り
出しを停止し、接合部１２でランス１０を取外しノズル
交換作業を直ちに行い、予備ノズルに取替えたので以後
の操業は順調に行われた。When an actual operation was carried out using the apparatus of the present invention having eight nozzles, it was found that, at about 1.5 hours after the start of production, extraneous matter was generated at the tip of one nozzle and abnormal spraying occurred. Since it was recognized, the delivery of the slurry was stopped by the shut-off valve 19 only for the deposit generating nozzle while the operation was being performed, the lance 10 was removed at the joint 12, the nozzle was replaced immediately, and the spare nozzle was replaced. The operation has been successful.
【００３０】[0030]
【発明の効果】本発明によれば、乾燥熱風とスラリーの
熱交換を向流方式としたため、乾燥塔の規模を大きくす
る必要がなく、設備コストの低減に役立ち、また、マル
チノズル方式を採用したので、操業中にノズル詰り、ま
たはノズル先端部に付着物が発生しても、操業を停止せ
ずに異常状態となったノズルのみを交換することによ
り、操業に支障をきたすことなく適正な粒度をもつ中空
顆粒フラックスの製造を容易に行うことができ、生産性
の低下をきたすことのない優れた効果を有する。According to the present invention, the heat exchange between the drying hot air and the slurry is performed in the countercurrent system, so that it is not necessary to increase the scale of the drying tower, which contributes to reducing the equipment cost, and employs the multi-nozzle system. Therefore, even if the nozzle is clogged during operation, or if there is a deposit on the tip of the nozzle, the operation is not stopped and only the abnormal nozzle is replaced. It is possible to easily produce a hollow granular flux having a particle size, and has an excellent effect without lowering the productivity.
【図１】本発明装置の全体を示す概略図FIG. 1 is a schematic diagram showing the entirety of the apparatus of the present invention.
【図２】本発明の乾燥塔の１例を示す概略図FIG. 2 is a schematic diagram showing one example of a drying tower of the present invention.
１ 熱風発生装置 ２ 熱風（空気） ２ａ 熱風旋回流 ３ 搬送管 ４ 水性原料スラリー ５ 熱風乾燥塔 ５ａ 上部乾燥塔 ５ｂ 中部乾燥塔 ５ｃ 下部乾燥塔 ６ セパレート板 ７ 熱風分岐管 ８ 側壁 ９ ノズル １０ ランス １１ 環状管 １２ 接続部 １３ 熱風排気部 １４ 覗き窓 １８ 排気ダクト １９ 遮断弁 ２０ 点検口 ２１ 鍔部材 DESCRIPTION OF SYMBOLS 1 Hot-air generator 2 Hot-air (air) 2a Hot-air swirling flow 3 Conveying pipe 4 Aqueous raw material slurry 5 Hot-air drying tower 5a Upper-drying tower 5b Middle-drying tower 5c Lower-drying tower 6 Separate plate 7 Hot-air branch pipe 8 Side wall 9 Nozzle 10 Lance 11 Annular pipe 12 Connection part 13 Hot air exhaust part 14 Viewing window 18 Exhaust duct 19 Shut-off valve 20 Inspection port 21 Flange member
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−23257（ＪＰ，Ａ) 特開 昭48−23941（ＪＰ，Ａ) 特開 昭53−103979（ＪＰ，Ａ) 特開 平10−166122（ＪＰ，Ａ) 特開 平10−146657（ＪＰ，Ａ) 特開 昭60−87960（ＪＰ，Ａ) 特開 平10−58104（ＪＰ，Ａ) 特開 昭61−150752（ＪＰ，Ａ) 特開 昭52−123330（ＪＰ，Ａ) 特開 平９−57407（ＪＰ，Ａ) 実開 昭57−136434（ＪＰ，Ｕ) 特公 平３−79100（ＪＰ，Ｂ２) 特公 昭50−16021（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B22D 11/108 B22D 11/07 C21C 7/076 B01J 2/04 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-23257 (JP, A) JP-A-48-23941 (JP, A) JP-A-53-103979 (JP, A) JP-A-10- 166122 (JP, A) JP-A-10-146657 (JP, A) JP-A-60-87960 (JP, A) JP-A-10-58104 (JP, A) JP-A-61-150752 (JP, A) JP-A-52-123330 (JP, A) JP-A-9-57407 (JP, A) JP-A-57-136434 (JP, U) JP-B 3-79100 (JP, B2) JP-B 50-16021 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) B22D 11/108 B22D 11/07 C21C 7/076 B01J 2/04
Claims (5)
発乾燥する装置であって、熱風供給源からの熱風を搬送
する熱風搬送管を、円筒状の乾燥塔の頂部に接続し、さ
らに、原料スラリーを乾燥塔内に噴射する複数個のラン
スノズルを、前記乾燥塔の側壁を貫通させ、乾燥塔直胴
部内で点対称に、かつ、ノズルを上向き傾斜をもたせて
着脱自在に配設すると共に、前記乾燥塔直胴部の下方に
は製品フラックスと、乾燥済み熱風の排気とを分別して
排出する熱風排気部と、モールドフラックス製品貯留切
り出し部とにより構成したことを特徴とする中空顆粒モ
ールドフラックスの製造装置。An apparatus for evaporating and drying a raw material slurry of a mold flux, wherein a hot air conveying pipe for conveying hot air from a hot air supply source is connected to the top of a cylindrical drying tower, and further, the raw material slurry is dried. A plurality of lance nozzles for injecting into the tower are penetrated through the side wall of the drying tower, point-symmetrically arranged inside the drying tower body, and detachably disposed with the nozzle inclined upward, and the drying is performed. An apparatus for manufacturing a hollow granular mold flux, comprising: a hot air exhaust section that separates and discharges product flux, dried hot air exhaust and a mold flux product storage cut-out section below the tower straight body. .
均等分配するセパレータ板を設けたことを特徴とする請
求項１記載の中空顆粒モールドフラックスの製造装置。2. The hot air is directed downward at the top of the drying tower, and
2. The apparatus for producing a hollow granular mold flux according to claim 1, further comprising a separator plate for even distribution.
送管より分岐させ、乾燥塔頂部下方近傍で、かつ、該乾
燥塔に対して接線方向に熱風分岐管を設置したことを特
徴とする請求項１または請求項２記載の中空顆粒モール
ドフラックスの製造装置。3. A part of the hot air blown into the drying tower is branched from the hot air conveying pipe, and a hot air branch pipe is installed near a lower portion of the top of the drying tower and tangentially to the drying tower. The apparatus for producing a hollow granule mold flux according to claim 1 or 2.
スノズル外径より大とし、該ランスノズルの乾燥塔内挿
入深さ位置に設けた湾曲状鍔部材を前記貫通孔に嵌装固
定することを特徴とする請求項１ないし請求項３のいず
れかに記載の中空顆粒モールドフラックスの製造装置。4. A diameter of a through hole provided in a side wall of the drying tower is made larger than an outer diameter of a lance nozzle, and a curved flange member provided at a depth of insertion of the lance nozzle into the drying tower is fitted and fixed to the through hole. The apparatus for producing a hollow granular mold flux according to any one of claims 1 to 3, wherein:
塔内に噴射する複数個のランスノズルを、乾燥塔の外周
を囲繞するスラリー供給用環状管の各枝管に遮断弁を設
けて、着脱自在に取付けたことを特徴とする請求項１な
いし請求項４のいずれかに記載の中空顆粒モールドフラ
ックスの製造装置。5. A plurality of lance nozzles for injecting the raw material slurry disposed in the drying tower into the drying tower, and a shutoff valve provided on each branch pipe of the slurry supply annular pipe surrounding the outer periphery of the drying tower. The apparatus for manufacturing a hollow granular mold flux according to any one of claims 1 to 4, wherein the apparatus is detachably attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01599697A JP3226821B2 (en) | 1997-01-14 | 1997-01-14 | Hollow granule mold flux manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01599697A JP3226821B2 (en) | 1997-01-14 | 1997-01-14 | Hollow granule mold flux manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10193060A JPH10193060A (en) | 1998-07-28 |
| JP3226821B2 true JP3226821B2 (en) | 2001-11-05 |
Family
ID=11904265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01599697A Expired - Fee Related JP3226821B2 (en) | 1997-01-14 | 1997-01-14 | Hollow granule mold flux manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3226821B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7292843B2 (en) * | 2018-09-27 | 2023-06-19 | 太平洋セメント株式会社 | spray pyrolyzer or spray dryer |
-
1997
- 1997-01-14 JP JP01599697A patent/JP3226821B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10193060A (en) | 1998-07-28 |
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