JPH11257615A - Burner for manufacturing spherical grain - Google Patents
Burner for manufacturing spherical grainInfo
- Publication number
- JPH11257615A JPH11257615A JP10058602A JP5860298A JPH11257615A JP H11257615 A JPH11257615 A JP H11257615A JP 10058602 A JP10058602 A JP 10058602A JP 5860298 A JP5860298 A JP 5860298A JP H11257615 A JPH11257615 A JP H11257615A
- Authority
- JP
- Japan
- Prior art keywords
- burner
- inorganic powder
- raw material
- gas
- spherical particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000000843 powder Substances 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 30
- 239000002737 fuel gas Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims description 37
- 238000005192 partition Methods 0.000 claims description 31
- 239000012798 spherical particle Substances 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract 3
- 239000007924 injection Substances 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 1
- 239000012797 inorganic spherical particle Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000003915 liquefied petroleum gas Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無機質粉体原料か
ら球状粒子を得る際に用いられる球状粒子製造用バーナ
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner for producing spherical particles used for obtaining spherical particles from a raw material of an inorganic powder.
【０００２】[0002]
【従来の技術】従来から、無機物質からなる粉体粒子は
樹脂用フィラー等として汎用されているが、用途によっ
ては、充填率の向上、流動性の改良、成形品の高強度化
等を目的として、不純物の混入のない、できるだけ真球
に近い球状粒子が強く望まれている。そこで、ガラス、
セラミックス等の無機物質からなる粉体粒子から球状粒
子を得る方法の一つとして、無機質粉体原料を可燃性ガ
スの燃焼フレーム中に分散通過させ、通過時に上記無機
質粉体原料を溶融あるいは軟化させることにより、物質
自身の表面張力で球状粒子としたのち、冷却固化して採
取する方法（いわゆる「火炎法」）が提案され、すでに
実用化されている（特開昭５８−１４５６１３号公報
等）。2. Description of the Related Art Conventionally, powder particles made of an inorganic substance have been widely used as fillers for resins, etc., but depending on the application, the purpose is to improve the filling rate, improve the fluidity, and increase the strength of molded articles. Therefore, spherical particles as close to a true sphere as possible without contamination of impurities are strongly desired. So, glass,
As one method for obtaining spherical particles from powder particles made of an inorganic substance such as ceramics, an inorganic powder raw material is dispersed and passed through a combustion flame of a combustible gas, and the inorganic powder raw material is melted or softened during the passage. As a result, a method has been proposed in which spherical particles are formed by the surface tension of the substance itself, and then solidified by cooling (so-called "flame method"), which has already been put into practical use (Japanese Patent Application Laid-Open No. 58-145613, etc.). .
【０００３】上記火炎法による代表的な無機質球状粒子
製造装置の一例を図５に示す。この装置によれば、定量
供給装置１を備えたホッパー２から、無機質粉体原料３
が一定量ずつ排出され、原料搬送用ガス供給配管４から
供給される原料搬送用ガス（酸素，ＬＰＧ等）によって
バーナ５に搬送供給されるようになっている。上記バー
ナ５の先端は、球状化炉６内に設置されており、配管
７，８から導入される燃料ガス（ＬＰＧ等）と支燃ガス
（酸素等）を受けて、球状化炉６内に燃焼フレームが形
成されるようになっている。そして、上記燃焼フレーム
内に前記無機質粉体原料３が噴出され、燃焼フレームの
熱で溶融あるいは軟化して、それ自身の表面張力によっ
て球状粒子９となる。そして、球状化炉６の下部におい
て冷却固化した球状粒子９は、サイクロン１０およびバ
グフィルタ１１により捕集されるようになっている。FIG. 5 shows an example of a typical apparatus for producing inorganic spherical particles by the above-mentioned flame method. According to this apparatus, the inorganic powder material 3
Are discharged by a predetermined amount, and are conveyed and supplied to the burner 5 by a raw material transport gas (oxygen, LPG, etc.) supplied from a raw material transport gas supply pipe 4. The tip of the burner 5 is installed in a sphering furnace 6 and receives a fuel gas (LPG or the like) and a supporting gas (oxygen or the like) introduced from pipes 7 and 8 and enters the sphering furnace 6. A combustion flame is formed. Then, the inorganic powder raw material 3 is jetted into the combustion flame, and is melted or softened by the heat of the combustion flame, and becomes spherical particles 9 by its own surface tension. The spherical particles 9 cooled and solidified in the lower part of the sphering furnace 6 are collected by the cyclone 10 and the bag filter 11.
【０００４】上記バーナ５の先端は、例えば図６に示す
ように、同心円的に配置された、大、中、小、三つの環
状隔壁１５を有している。そして、その最も内側に、無
機質粉体原料３を原料搬送用ガスとともに噴出するため
の原料噴出孔１２が形成されており、その外側に、燃料
ガス噴出孔１３が形成され、さらにその外側に、支燃ガ
ス噴出孔１４が形成されている。The tip of the burner 5 has, for example, three large, medium and small annular partitions 15 arranged concentrically as shown in FIG. On the innermost side, a raw material discharge hole 12 for discharging the inorganic powder raw material 3 together with the raw material carrying gas is formed, and on the outer side, a fuel gas discharge hole 13 is formed. The combustion supporting gas ejection holes 14 are formed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記装
置を用いて球状粒子９を製造すると、完全な球状品の得
られる割合が低く、球状になっていない粒子や、球状で
あっても未燃焼のカーボンが不純物として含まれたもの
が混在することが多く、問題となっている。これは、燃
焼フレームを形成するバーナ５の先端部に、無機質粉体
原料や、その溶融物、半溶融物、あるいは燃料ガスの不
完全燃焼に起因する未燃焼のカーボン等が付着し、その
付着物が、時間の経過とともにバーナ５の先端部から脱
落して、炉内の球状粒子９と混合されるからである。ま
た、場合によっては、上記バーナ５の先端部において、
これらの付着物が脱落せずに成長して溶融し、上記原料
噴出孔１２、燃料ガス噴出孔１３および支燃ガス噴出孔
１４を半閉塞、あるいは完全に閉塞させることがあり、
正常な燃焼フレームの形成に支障が生じることがある。
さらに極端な場合は、燃焼フレームが失火して、操業を
停止せざるを得ないことがある。このように、従来の装
置では、安定した品質の球状粒子を長期にわたって連続
的に製造することができず、その改良が強く望まれてい
る。However, when the spherical particles 9 are produced using the above-described apparatus, the percentage of complete spherical products obtained is low, and non-spherical particles or unburned particles even if spherical are obtained. In many cases, carbon-containing impurities are mixed, which is a problem. This is because, at the tip of the burner 5 forming the combustion frame, the inorganic powder raw material, its melt, semi-molten material, unburned carbon resulting from incomplete combustion of the fuel gas, and the like adhere to the burner 5. This is because the kimono falls off from the tip of the burner 5 with time and is mixed with the spherical particles 9 in the furnace. In some cases, at the tip of the burner 5,
These deposits may grow and melt without falling off, and may partially or completely block the raw material discharge holes 12, the fuel gas discharge holes 13, and the supporting gas discharge holes 14,
The formation of a normal combustion flame may be hindered.
In more extreme cases, the combustion flame may misfire and shut down operation. As described above, the conventional apparatus cannot continuously produce spherical particles of stable quality over a long period of time, and improvement thereof is strongly desired.
【０００６】本発明は、このような事情に鑑みなされた
もので、高品質の球状粒子を、効率よく連続的に製造す
ることのできる、優れたバーナの提供をその目的とす
る。The present invention has been made in view of such circumstances, and has as its object to provide an excellent burner capable of efficiently and continuously producing high-quality spherical particles.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は、無機質粉体原料を燃料ガスおよび支燃ガ
スとともに噴出させ、上記無機質粉体原料をガス燃焼フ
レーム中で溶融もしくは軟化させて表面張力により球状
化する際に用いられるバーナであって、上記無機質粉体
原料，燃料ガスおよび支燃ガスの噴出孔を形成する隔壁
先端部の少なくとも片面が、上記隔壁の延びる方向に対
し４５°以下の角度で傾斜し、隔壁先端縁が尖鋭化され
ている球状粒子製造用バーナを第１の要旨とする。In order to achieve the above object, the present invention provides a method for ejecting an inorganic powder material together with a fuel gas and a supporting gas to melt or soften the inorganic powder material in a gas combustion flame. A burner used for spheroidization by surface tension, wherein at least one surface of a partition wall tip forming an ejection hole for the inorganic powder raw material, the fuel gas, and the supporting gas is arranged in a direction in which the partition wall extends. A first aspect of the present invention is a burner for producing spherical particles, which is inclined at an angle of 45 ° or less and has a sharp edge at the end of a partition wall.
【０００８】また、上記球状粒子製造用バーナのなかで
も、特に、上記尖鋭化された隔壁先端縁に丸みが付与さ
れている球状粒子製造用バーナを第２の要旨とする。Further, among the above-mentioned burners for producing spherical particles, a second aspect of the present invention is a burner for producing spherical particles in which the sharpened partition wall has a rounded edge.
【０００９】すなわち、本発明者らは、従来の無機質球
状粒子製造装置において、前述のような問題が発生する
原因について研究を重ねた結果、各噴出孔からのガス流
が、噴出孔から噴出した瞬間に乱流を形成し、この乱流
によって、無機質粉体原料，その溶融物，未燃焼カーボ
ン等が、バーナ先端部に付着することを突き止めた。そ
して、上記乱流の発生は、バーナの噴出孔を形成する隔
壁の先端面が平面になっているからではないかと想起
し、バーナ噴出孔の隔壁先端形状について、さらに研究
を重ねた。その結果、上記隔壁先端部の少なくとも片面
を、隔壁の延びる方向に対し４５°以下の角度で傾斜さ
せて隔壁先端縁を尖鋭化することにより、所期の目的を
達成することを見いだし、本発明に到達した。That is, the present inventors have repeatedly studied the causes of the above-mentioned problems in the conventional apparatus for producing inorganic spherical particles, and as a result, the gas flow from each ejection hole was ejected from the ejection hole. A turbulent flow was formed instantaneously, and it was found that the turbulent flow caused the inorganic powder raw material, its melt, unburned carbon, and the like to adhere to the tip of the burner. Then, the turbulent flow was supposed to be caused by the fact that the tip end surface of the partition wall forming the burner ejection hole was flat, and further studies were conducted on the shape of the partition end of the burner ejection hole. As a result, it has been found that at least one surface of the partition wall tip portion is inclined at an angle of 45 ° or less with respect to the direction in which the partition wall extends to sharpen the partition wall tip edge, thereby achieving the intended purpose. Reached.
【００１０】[0010]
【発明の実施の形態】つぎに、本発明の実施の形態を説
明する。Next, an embodiment of the present invention will be described.
【００１１】図１（ａ）および（ｂ）は、本発明の球状
粒子製造用バーナの一実施の形態を示している。このバ
ーナ２０は、基本的には、図６に示す従来のバーナ５と
同一であり、同一部分に同一番号を付している。ただ
し、このバーナ２０は、原料噴出孔１２と燃料ガス噴出
孔１３と支燃ガス噴出孔１４を形成するために同心円的
に配置される、大、中、小、三つの環状隔壁１５の先端
縁が、いずれも鋭角的に尖鋭化されている、という特徴
を有する。FIGS. 1A and 1B show an embodiment of a burner for producing spherical particles according to the present invention. This burner 20 is basically the same as the conventional burner 5 shown in FIG. 6, and the same parts are given the same numbers. However, the burner 20 is provided with concentrically arranged large, medium, and small annular partition walls 15 for forming the raw material discharge holes 12, the fuel gas discharge holes 13, and the support gas discharge holes 14. However, each has a feature that it is sharpened sharply.
【００１２】より詳しく説明すると、上記バーナ２０の
３つの環状隔壁１５の先端部は、いずれも、その外周面
が、内側に向かって、環状隔壁１５の延びる方向Ｘ（図
２〔ａ〕参照）に対する角度θが３０°となる傾斜面１
６に形成されている。More specifically, the outer peripheral surfaces of the three end portions of the three annular partitions 15 of the burner 20 are directed inward in the direction X in which the annular partitions 15 extend (see FIG. 2A). Inclined surface 1 at which the angle θ with respect to is 30 °
6 is formed.
【００１３】上記バーナ２０を従来の無機質球状粒子製
造装置（例えば図５に示す装置）に組み込んで、球状粒
子を製造すると、各噴出孔１２，１３，１４から噴出す
る無機質粉体原料、燃料ガス、支燃ガスが、いずれもそ
の噴出開口近傍において乱流を発生することなく噴出す
るため、噴出孔１２，１３，１４の周囲に、無機質粉体
原料や、その溶融物、未燃焼カーボン等が付着すること
がない。したがって、上記バーナ２０を用いることによ
り、純度の高い、高品質の球状粒子を、長期にわたって
連続的に製造することができる。When the burner 20 is incorporated into a conventional inorganic spherical particle producing apparatus (for example, the apparatus shown in FIG. 5) to produce spherical particles, the inorganic powder raw material and fuel gas ejected from the ejection holes 12, 13, and 14 are produced. Since the supporting gas is ejected without any turbulence near the ejection opening, the inorganic powder raw material, its melt, unburned carbon and the like are formed around the ejection holes 12, 13, and 14. Does not adhere. Therefore, by using the burner 20, it is possible to continuously produce high-purity, high-quality spherical particles over a long period of time.
【００１４】なお、上記の例において、環状隔壁１５の
先端部に形成された傾斜面１６の傾斜角度θは、３０°
に限らず、４５°以下の任意の角度に設定することがで
きるが、なかでも３０°以下に設定することが好適であ
る。すなわち、上記角度θが小さければ小さいほど、噴
出孔１２，１３，１４からの噴出流における乱流発生防
止効果が高い。ただし、４５°を超えると実用的な効果
が得られない。In the above example, the inclination angle θ of the inclined surface 16 formed at the tip of the annular partition wall 15 is 30 °.
The angle can be set to any angle of 45 ° or less, but it is preferable to set the angle to 30 ° or less. That is, the smaller the angle θ is, the higher the turbulence generation preventing effect in the jet flow from the jet holes 12, 13, 14 is. However, if it exceeds 45 °, a practical effect cannot be obtained.
【００１５】また、上記の例では、各環状隔壁１５の外
周面のみが、内側に向かって傾斜して傾斜面１６を形成
しているが、内周面を、外側に向かって傾斜させること
により傾斜面を形成するようにしてもよい。あるいは、
図２（ｂ）に示すように、環状隔壁１５の外周面から内
側に向かう傾斜面１６ａと、内周面から外側に向かう傾
斜面１６ｂとを形成するようにしてもよい。この場合
も、各傾斜面１６ａ，１６ｂが環状隔壁１５の延びる方
向Ｘとなす角度θ1 とθ2 は、ともに４５°以下に設定
することが必要で、なかでも、ともに３０°以下に設定
することが好適である。ただし、両傾斜面１６ａ，１６
ｂの傾斜角度θ1 、θ2 は必ずしも同一角度である必要
はなく、互いに異なっていてもよい。Further, in the above example, only the outer peripheral surface of each annular partition wall 15 is inclined inward to form the inclined surface 16, but by inclining the inner peripheral surface outward. An inclined surface may be formed. Or,
As shown in FIG. 2 (b), an inclined surface 16a directed inward from the outer peripheral surface of the annular partition wall 15 and an inclined surface 16b directed outward from the inner peripheral surface may be formed. In this case as well, the angles θ 1 and θ 2 formed by the inclined surfaces 16a and 16b with the direction X in which the annular partition wall 15 extends need to be set to 45 ° or less, and particularly to 30 ° or less. Is preferred. However, both inclined surfaces 16a, 16
The inclination angles θ 1 and θ 2 of b need not necessarily be the same angle, and may be different from each other.
【００１６】なお、環状隔壁１５の先端部に片面傾斜を
形成する場合であっても、両面傾斜を形成する場合であ
っても、その先端縁に、図３（ａ）および（ｂ）に示す
ように、丸みを付与することができる。したがって、本
発明において「尖鋭化されている」状態とは、その先端
縁に丸みが付与された状態のものも含む趣旨である。た
だし、丸みの形成によって先端縁が平坦面に近くなる
と、本発明の効果である、乱気流発生防止効果が薄れる
ため、その丸みは、環状隔壁１５の厚みにもよるが、通
常、曲率半径Ｒが、２ｍｍ以下となるよう設定すること
が好ましい。Regardless of the case where a one-sided slope is formed at the tip end of the annular partition wall 15, or the case where a double-sided slope is formed, the end edge thereof is shown in FIGS. 3 (a) and 3 (b). As described above, roundness can be provided. Therefore, in the present invention, the “sharpened” state includes a state in which the leading edge is rounded. However, when the leading edge becomes close to a flat surface due to the formation of the roundness, the effect of the present invention, that is, the effect of preventing the generation of turbulence is weakened. Therefore, the roundness depends on the thickness of the annular partition wall 15, but the radius of curvature R is usually It is preferable to set the distance to 2 mm or less.
【００１７】また、各噴出孔１２，１３，１４を環状隔
壁１５で形成するのではなく、図４に示すように、中心
に、原料噴出孔１２となるパイプ２２を配し、その周囲
に、細い燃料ガス供給パイプ２３を環状に配して燃料ガ
ス噴出孔１３を形成し、さらにその周囲に、細い支燃ガ
ス供給パイプ２４を環状に配して支燃ガス噴出孔１４を
形成したバーナ２１を用いることも考えられる。このバ
ーナ２１によれば、噴出孔１２，１３，１４の周囲の、
環状隔壁１５に相当する部分の肉厚を薄くすることで
（例えば肉厚１〜３ｍｍ）、前述のような、傾斜面１６
（１６ａ，１６ｂ）を形成しなくても、ある程度噴出流
において乱流が発生するのを防止することができ、バー
ナ２１先端面に対する無機質粉体原料等の付着を低減す
ることができる。しかし、パイプ２２，２３，２４の側
壁部に付着が発生し、これが成長して一部溶融し脱落し
て製品形状不良化の原因となる。また、各パイプ２２，
２３，２４の側壁が肉薄のため、長時間運転すると熱損
傷が発生しやすい、という問題がある。そこで、本発明
の効果を得るためには、上記のような構造のバーナ２１
を用いるにしても、ある程度パイプ側壁を厚くして（例
えば肉厚３ｍｍ以上）、前述のように、各パイプ２２，
２３，２４の先端縁に傾斜面１６（１６ａ，１６ｂ）を
形成することが必要である。Further, instead of forming the ejection holes 12, 13, and 14 with the annular partition wall 15, as shown in FIG. 4, a pipe 22 serving as the material ejection hole 12 is disposed at the center, and around the pipe 22, Burner 21 in which thin fuel gas supply pipe 23 is arranged annularly to form fuel gas ejection holes 13, and around which a thin support gas supply pipe 24 is arranged annularly to form combustion gas ejection holes 14. It is also conceivable to use. According to this burner 21, around the ejection holes 12, 13, 14,
By reducing the thickness of a portion corresponding to the annular partition wall 15 (for example, a thickness of 1 to 3 mm), the inclined surface 16 as described above is used.
Even if (16a, 16b) is not formed, generation of turbulence in the jet flow can be prevented to some extent, and adhesion of the inorganic powder raw material and the like to the tip end surface of the burner 21 can be reduced. However, adhesion occurs on the side walls of the pipes 22, 23, and 24, which grows, partially melts, and falls off, resulting in a defective product shape. In addition, each pipe 22,
Since the side walls of 23 and 24 are thin, there is a problem that thermal damage is liable to occur when operated for a long time. Therefore, in order to obtain the effect of the present invention, the burner 21 having the above-described structure is required.
Is used, the side walls of the pipes are thickened to some extent (for example, the wall thickness is 3 mm or more), and as described above,
It is necessary to form the inclined surface 16 (16a, 16b) at the leading edge of each of 23 and 24.
【００１８】なお、本発明のバーナは、図１および図４
に示す例に限らず、どのようなタイプのものであっても
差し支えはなく、無機質粉体原料、燃料ガス、支燃ガス
がどのような流路で導入され噴出されるようになってい
てもよい。The burner according to the present invention is similar to the burner shown in FIGS.
Not limited to the example shown in the above, any type may be used, and the inorganic powder raw material, the fuel gas, and the supporting gas may be introduced and jetted in any flow path. Good.
【００１９】また、上記バーナを用いて無機質粉体原料
を球状化するに際し、用いる無機質粉体原料について
も、特に限定するものではなく、ガラス，セラミックス
等で総称される金属酸化物の混合融解物、あるいは単
体、混合物があげられる。具体的には、ソーダライムガ
ラス，ほう珪酸ガラス，シリカ，アルミナ，ジルコニ
ア，ジルコン，マグネシア等や、これらの混合焼結体が
あげられる。In spheroidizing the inorganic powder raw material using the burner, the inorganic powder raw material to be used is not particularly limited, and a mixed and molten metal oxide generally referred to as glass, ceramics or the like is used. Or a simple substance or a mixture. Specific examples include soda lime glass, borosilicate glass, silica, alumina, zirconia, zircon, magnesia, and the like, and a mixed sintered body thereof.
【００２０】そして、バーナに供給される燃料ガス、支
燃ガスについても、従来から用いられるどのようなもの
であってもよい。燃料ガスとしては、通常、プロパン，
ブタン等の液化石油ガス（ＬＰＧ）が用いられる。ま
た、支燃ガスとしては、通常、酸素が用いられるが、無
機質粉体原料の融点，軟化点によっては酸素富化した空
気も使用される。なお、無機質粉体原料を搬送して原料
噴出孔１２から噴出させるためのガスも、通常、上記支
燃ガスが用いられる。The fuel gas and the supporting gas supplied to the burner may be any of those conventionally used. Usually, propane,
Liquefied petroleum gas (LPG) such as butane is used. Oxygen is usually used as the supporting gas, but oxygen-enriched air is also used depending on the melting point and softening point of the inorganic powder raw material. The above-mentioned supporting gas is usually used also as a gas for transporting the inorganic powder raw material and ejecting it from the raw material ejection holes 12.
【００２１】つぎに、実施例について比較例と併せて説
明する。Next, examples will be described together with comparative examples.
【００２２】[0022]
【実施例１〜５、比較例１〜３】図５に示す無機質球状
粒子製造装置に、後記の表１および表２に示すように、
先端形状の異なる８種類のバーナを組み込んで、実際に
無機質粉体原料から球状粒子を製造した。無機質粉体原
料として平均粒径が２０μｍで粒径分布が５〜１２０μ
ｍの結晶シリカ粉砕品を用いた。また、燃料ガスとして
市販プロパンを用い、支燃ガスおよび無機質粉体原料搬
送用の支燃ガスとして酸素ガスを用いた。Examples 1 to 5 and Comparative Examples 1 to 3 As shown in Tables 1 and 2 below, the apparatus for producing inorganic spherical particles shown in FIG.
Eight types of burners having different tip shapes were incorporated, and spherical particles were actually produced from inorganic powder raw materials. As an inorganic powder raw material, the average particle size is 20 μm and the particle size distribution is 5 to 120 μm.
m of crystalline silica pulverized product was used. In addition, commercially available propane was used as a fuel gas, and oxygen gas was used as a supporting gas and a supporting gas for transporting an inorganic powder raw material.
【００２３】そして、バーナを燃焼して無機質粉体原料
の球状化を１時間行った後、バーナの原料噴出孔と燃料
ガス噴出孔の間の隔壁先端部（Ａ）と、燃料ガス噴出孔
と支燃ガス噴出孔の間の隔壁先端部（Ｂ）と、支燃ガス
噴出孔の外側を形成する隔壁先端部（Ｃ）に、無機質粉
体原料、その溶融物、未燃焼のカーボンが付着していな
いかどうかを肉眼で観察し、下記のとおり評価した。After the burner has been burned to spheroidize the inorganic powder raw material for one hour, the partition wall tip (A) between the raw material discharge hole and the fuel gas discharge hole of the burner, and the fuel gas discharge hole The inorganic powder raw material, its melt, and unburned carbon adhere to the partition wall tip (B) between the supporting gas outlets and the partition tip (C) forming the outside of the supporting gas outlet. The presence or absence was visually observed and evaluated as follows.
【００２４】 ○…全く付着がない △…わずかに付着している ×…かなり付着している…: No adhesion Δ: slight adhesion ×: considerable adhesion
【００２５】また、バーナ先端を清浄にして、今度は６
時間連続して無機質粉体原料の球状化を行った後、上記
と同様にして観察および評価を行った。これらの結果
を、下記の表１および表２に併せて示す。Further, the tip of the burner is cleaned, and
After spheroidizing the inorganic powder raw material continuously for a time, observation and evaluation were performed in the same manner as described above. The results are shown in Tables 1 and 2 below.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【表２】 ＊１：各パイプの肉厚は３ｍｍ ＊２：各パイプの肉厚は２ｍｍ[Table 2] * 1: The thickness of each pipe is 3 mm * 2: The thickness of each pipe is 2 mm
【００２８】上記の結果から、実施例品は、いずれも無
機質粉体原料、その溶融物、未燃焼カーボンの付着が発
生せず、高品質の球状粒子が得られることがわかる。こ
れに対し、隔壁先端形状が緩慢な傾斜角度（θ＝６０
°）である比較例１品では付着が発生し、全くの平面で
ある比較例３品は付着がかなり多く発生した。また、図
４に示す、肉薄パイプで噴出孔を形成しただけの比較例
２品は、部分的に付着が発生した。そして、このものは
パイプ先端部の一部が熔損した。一方、同様の構成であ
っても、パイプを比較的厚くし、かつその先端縁に３０
°の傾斜面を形成した実施例５品は、付着および熔損が
発生せず、良好な結果が得られた。From the above results, it can be seen that all of the products in the examples have no adhesion of the inorganic powder raw material, the melt thereof, and the unburned carbon, and high quality spherical particles can be obtained. On the other hand, the tip of the partition wall has a gentle inclination angle (θ = 60).
In the case of Comparative Example 1 which is (°), adhesion occurred, and in the case of Comparative Example 3 which was a completely flat surface, adhesion was considerably increased. In addition, the product of Comparative Example 2 in which the ejection hole was simply formed by a thin pipe shown in FIG. 4 partially adhered. Then, a part of the tip of the pipe was melted. On the other hand, even with the same configuration, the pipe is made relatively thick, and the tip edge thereof is 30
The product of Example 5 in which the inclined surface was formed did not cause adhesion and melting, and good results were obtained.
【００２９】[0029]
【発明の効果】以上のように、本発明の球状粒子製造用
バーナは、無機質粉体原料，燃料ガスおよび支燃ガスの
噴出孔を形成する隔壁先端部に傾斜面を形成して、隔壁
先端縁を尖鋭化したものであるため、噴出孔から噴出す
る噴出流において乱流が発生せず、その結果、噴出孔の
周囲に、無機質粉体原料やその溶融物、未燃焼カーボン
等が付着しない、という効果を奏する。したがって、本
発明のバーナを用いて球状粒子の製造を行うと、従来か
ら問題となっていた、付着不純物の炉内への脱落による
不純物の混入や、粒子の不定形状化を防止することがで
き、高品質の球状粒子を、長期にわたって連続的に製造
することができる。As described above, the burner for producing spherical particles according to the present invention has an inclined surface formed at the tip of the partition wall forming the ejection hole for the inorganic powder raw material, the fuel gas and the supporting gas. Since the edge is sharpened, turbulence does not occur in the jet flow ejected from the ejection hole, and as a result, the inorganic powder raw material, its melt, unburned carbon, etc. do not adhere around the ejection hole The effect is as follows. Therefore, when spherical particles are produced using the burner of the present invention, it has been possible to prevent the contamination of impurities due to falling off of adhered impurities into the furnace and the irregular formation of particles, which has conventionally been a problem. , High quality spherical particles can be produced continuously over a long period of time.
【図１】（ａ）は本発明の一実施例の構成を示す部分的
な斜視図、（ｂ）はその縦断面図である。FIG. 1A is a partial perspective view showing a configuration of an embodiment of the present invention, and FIG. 1B is a longitudinal sectional view thereof.
【図２】（ａ）は上記実施例の特徴を説明する説明図、
（ｂ）は他の実施例の説明図である。FIG. 2A is an explanatory diagram for explaining the features of the embodiment,
(B) is an explanatory view of another embodiment.
【図３】（ａ），（ｂ）はそれぞれさらに他の実施例の
説明図である。FIGS. 3A and 3B are explanatory views of still another embodiment. FIG.
【図４】本発明を適用しうる他の構成のバーナを示す部
分的な斜視図である。FIG. 4 is a partial perspective view showing a burner having another configuration to which the present invention can be applied.
【図５】無機質球状粒子製造装置の一般的な例を示す構
成図である。FIG. 5 is a configuration diagram showing a general example of an apparatus for producing inorganic spherical particles.
【図６】上記無機質球状粒子製造装置に用いるバーナの
一般的な例を示す部分的な縦断面図である。FIG. 6 is a partial longitudinal sectional view showing a general example of a burner used in the above-mentioned apparatus for producing inorganic spherical particles.
１２ 原料噴出孔 １３ 燃料ガス噴出孔 １４ 支燃ガス噴出孔 １５ 環状隔壁 １６ 傾斜面 ２０ バーナ Reference Signs List 12 raw material discharge hole 13 fuel gas discharge hole 14 supporting gas discharge hole 15 annular partition 16 inclined surface 20 burner
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０８Ｋ 7/18 Ｃ０８Ｋ 7/18 Ｃ０８Ｌ 101/00 Ｃ０８Ｌ 101/00 (72)発明者 清水 芳樹 大阪府枚方市大峰南町10番１号 株式会社 ユニオン内 (72)発明者 梶原 一敏 大阪府枚方市大峰南町10番１号 株式会社 ユニオン内Continued on the front page (51) Int.Cl. 6 Identification code FI C08K 7/18 C08K 7/18 C08L 101/00 C08L 101/00 (72) Inventor Yoshiki Shimizu 10-1 Omine Minamicho, Hirakata-shi, Osaka Inside the Union (72) Inventor Kazutoshi Kajiwara 10-1 Omine Minamicho, Hirakata City, Osaka
Claims (2)
スとともに噴出させ、上記無機質粉体原料をガス燃焼フ
レーム中で溶融もしくは軟化させて表面張力により球状
化する際に用いられるバーナであって、上記無機質粉体
原料，燃料ガスおよび支燃ガスの噴出孔を形成する隔壁
先端部の少なくとも片面が、上記隔壁の延びる方向に対
し４５°以下の角度で傾斜し、隔壁先端縁が尖鋭化され
ていることを特徴とする球状粒子製造用バーナ。1. A burner which is used when an inorganic powder raw material is ejected together with a fuel gas and a supporting gas, and the inorganic powder raw material is melted or softened in a gas combustion frame to form a sphere by surface tension. In addition, at least one surface of the tip of the partition wall forming the ejection hole for the inorganic powder raw material, the fuel gas and the supporting gas is inclined at an angle of 45 ° or less with respect to the direction in which the partition extends, and the tip edge of the partition is sharpened. A burner for producing spherical particles.
与されている請求項１記載の球状粒子製造用バーナ。2. The burner for producing spherical particles according to claim 1, wherein the sharpened partition wall has a rounded edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10058602A JPH11257615A (en) | 1998-03-10 | 1998-03-10 | Burner for manufacturing spherical grain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10058602A JPH11257615A (en) | 1998-03-10 | 1998-03-10 | Burner for manufacturing spherical grain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11257615A true JPH11257615A (en) | 1999-09-21 |
Family
ID=13089075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10058602A Pending JPH11257615A (en) | 1998-03-10 | 1998-03-10 | Burner for manufacturing spherical grain |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11257615A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003532796A (en) * | 2000-05-05 | 2003-11-05 | アーゲーアー アクツイエボラーグ | Metal recovery method and apparatus |
| WO2006129908A1 (en) * | 2005-05-31 | 2006-12-07 | Korea Institute Of Science And Technology | Combustion reactors for nanopowders, synthesis apparatus for nanopowders with the combustion reactors, and method of controlling the synthesis apparatus |
| JP2008179876A (en) * | 2006-03-23 | 2008-08-07 | Jfe Steel Kk | Powder heating burner lance and smelting reduction method using it |
| JP2012078020A (en) * | 2010-10-01 | 2012-04-19 | Osaka Gas Co Ltd | Heating device for granular material |
| WO2012157733A1 (en) * | 2011-05-18 | 2012-11-22 | 株式会社東北テクノアーチ | Metallic powder production method and metallic powder production device |
-
1998
- 1998-03-10 JP JP10058602A patent/JPH11257615A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003532796A (en) * | 2000-05-05 | 2003-11-05 | アーゲーアー アクツイエボラーグ | Metal recovery method and apparatus |
| WO2006129908A1 (en) * | 2005-05-31 | 2006-12-07 | Korea Institute Of Science And Technology | Combustion reactors for nanopowders, synthesis apparatus for nanopowders with the combustion reactors, and method of controlling the synthesis apparatus |
| KR100673385B1 (en) | 2005-05-31 | 2007-01-24 | 한국과학기술연구원 | Combustion reactors for nanopowders, synthesis apparatus for nanopowders with the combustion reactors, and method of controlling the synthesis apparatus |
| US8092571B2 (en) | 2005-05-31 | 2012-01-10 | Korea Institute Of Science And Technology | Combustion reactors for nanopowders, synthesis apparatus for nanopowders with the combustion reactors, and method of controlling the synthesis apparatus |
| JP2008179876A (en) * | 2006-03-23 | 2008-08-07 | Jfe Steel Kk | Powder heating burner lance and smelting reduction method using it |
| JP2012078020A (en) * | 2010-10-01 | 2012-04-19 | Osaka Gas Co Ltd | Heating device for granular material |
| WO2012157733A1 (en) * | 2011-05-18 | 2012-11-22 | 株式会社東北テクノアーチ | Metallic powder production method and metallic powder production device |
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