JPH08226614A - Flash smelting burner - Google Patents
Flash smelting burnerInfo
- Publication number
- JPH08226614A JPH08226614A JP5520695A JP5520695A JPH08226614A JP H08226614 A JPH08226614 A JP H08226614A JP 5520695 A JP5520695 A JP 5520695A JP 5520695 A JP5520695 A JP 5520695A JP H08226614 A JPH08226614 A JP H08226614A
- Authority
- JP
- Japan
- Prior art keywords
- combustion cylinder
- pipe
- raw material
- upper combustion
- ceiling
- 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.)
- Granted
Links
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- Manufacture And Refinement Of Metals (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 フラッシュ製錬用バーナーにおいて、Ｚｎ・
Ｐｂ原料を処理することによる粉コークスのガス化率の
低下を防ぐ。
【構成】 中央部に孔３を有する天井が設けられた上部
燃焼筒４と、上部にノズル２が設けられ下端が前記上部
燃焼筒の天井５の孔３に接合された予混合管１と、該上
部燃焼筒の天井５に設けられた副混合管９と、中央部に
該上部燃焼筒４と接続する孔を有する天井８に該上部燃
焼筒４の下端が接合された下部燃焼筒７と、該下部燃焼
筒の天井８に設けられた原料装入管１０からなり、前記
予混合管１と前記上部燃焼筒の天井５と下部燃焼筒の天
井８とが同芯円状に設けられ、前記予混合管１と前記上
部燃焼筒４と前記下部燃焼筒７の中心軸が実質的に同じ
になるように配置されたフラッシュ製錬用バーナー。
(57) [Summary] (Modified) [Purpose] In the burner for flash smelting, Zn.
The reduction of the gasification rate of powder coke due to the treatment of the Pb raw material is prevented. [Structure] An upper combustion cylinder 4 having a ceiling having a hole 3 in a central portion, a premixing pipe 1 having a nozzle 2 provided at an upper portion and a lower end thereof joined to a hole 3 of a ceiling 5 of the upper combustion cylinder, A sub-mixing tube 9 provided on a ceiling 5 of the upper combustion tube, and a lower combustion tube 7 in which a lower end of the upper combustion tube 4 is joined to a ceiling 8 having a hole for connecting to the upper combustion tube 4 in a central portion. , A raw material charging pipe 10 provided on a ceiling 8 of the lower combustion cylinder, and the premixing pipe 1, the ceiling 5 of the upper combustion cylinder, and the ceiling 8 of the lower combustion cylinder are concentrically provided, A flash smelting burner arranged such that the central axes of the premixing tube 1, the upper combustion cylinder 4, and the lower combustion cylinder 7 are substantially the same.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ｚｎ及び／又はＰｂの
フラッシュ還元製錬用バーナーに関する。FIELD OF THE INVENTION The present invention relates to a burner for flash reduction smelting of Zn and / or Pb.
【０００２】[0002]
【従来の技術】本発明にかかるバーナーは、Ｚｎ及び／
又はＰｂ精錬用還元炉に用いられ、Ｚｎ及び／又はＰｂ
の酸化物を含有する粉状原料及び／又は該酸化物を含有
する熔融スラグ（以下、Ｚｎ・Ｐｂ原料という。）、粉
状燃料、そして反応用酵素を供給するのに用いられる。
Ｚｎ・Ｐｂ原料中の金属を炭素系固体燃料により蒸気に
変えて還元ガスとともに次工程に送る還元炉としてはＩ
ＳＦが良く知られている。しかしＩＳＦは高価な塊コー
クス、ならびに生産効率の悪い焼結工程において製造さ
れる焼結塊を必要とする為、安価な炭素系粉状固体燃料
（以下、粉状燃料という）、及び粉状原料を処理するこ
とのできる還元製錬法が望まれていた。このような還元
製錬法のひとつとしてフラッシュ還元製錬法がある。こ
の製錬法の一例として、本発明者らの出願にかかる特開
平：６−０２７１９５３号公報「Ｚｎ・Ｐｂ製錬用フラ
ッシュ還元炉とその操業方法」に記載の製錬方法があ
る。2. Description of the Related Art A burner according to the present invention contains Zn and / or
Or, used in a reduction furnace for Pb refining, Zn and / or Pb
It is used to supply the powdery raw material containing the oxide and / or the molten slag containing the oxide (hereinafter referred to as Zn.Pb raw material), the powdered fuel, and the reaction enzyme.
As a reducing furnace for converting metal in Zn / Pb raw material into vapor by carbon-based solid fuel and sending it to the next process together with reducing gas, I
SF is well known. However, since the ISF requires an expensive lump coke and a sinter lump produced in a sintering process with low production efficiency, an inexpensive carbon powder solid fuel (hereinafter referred to as powder fuel) and a powder raw material are used. There has been a demand for a reduction smelting method capable of treating slag. The flash reduction smelting method is one of such reduction smelting methods. As an example of this smelting method, there is a smelting method described in Japanese Patent Application Laid-Open No. 6-0271953 “Zn / Pb smelting flash reduction furnace and its operating method” applied for by the present inventors.
【０００３】この方法では、図３に示すように還元炉の
セトラー１０上にあるシャフト２０の天井に製錬バーナ
ー３０を据え、このバーナー３０を介してＺｎ・Ｐｂ原
料、粉状燃料、反応用酸素を還元炉１０内に装入する。
そして、還元炉１０内のガス体はアップテーク４０から
導出され、溶融体５０は排出口（図示省略）から導出さ
れる。前記製錬バーナー３０は、図４に示すように、中
央部に孔を有する天井が設けられた燃焼筒３１と、上部
側面にノズル３３が設けられ、下端が前記燃焼筒３１の
天井３６の孔に接合された予混合管３２と、該燃焼筒の
天井３６に設けた副混合管３４及び原料装入管３５とか
らなることを特徴としている。なお、天井３６には水冷
装置３８が設けてある。該製錬バーナーの使用方法で
は、前記予混合管３２の上端及び前記副混合管３４から
粉コークスを空気流送で装入し、前記ノズル３３から工
業用酸素を装入し、また前記原料装入管３５からＺｎ・
Ｐｂ原料を空気流送する。In this method, as shown in FIG. 3, a smelting burner 30 is installed on the ceiling of a shaft 20 on a settler 10 of a reduction furnace, and a Zn / Pb raw material, a powdered fuel, and a reaction fuel are supplied through the burner 30. Oxygen is charged into the reduction furnace 10.
Then, the gas body in the reduction furnace 10 is led out from the uptake 40, and the melted body 50 is led out from an outlet (not shown). As shown in FIG. 4, the smelting burner 30 has a combustion cylinder 31 having a ceiling having a hole in the center, a nozzle 33 provided on an upper side surface, and a lower end having a hole in a ceiling 36 of the combustion cylinder 31. It is characterized in that it comprises a premixing pipe 32 joined to the above, a sub-mixing pipe 34 and a raw material charging pipe 35 provided on a ceiling 36 of the combustion cylinder. A water cooling device 38 is provided on the ceiling 36. In the method of using the smelting burner, powder coke is charged by air flow from the upper end of the premixing pipe 32 and the sub-mixing pipe 34, industrial oxygen is charged from the nozzle 33, and the raw material charging device is used. Zn from the inlet pipe 35
Air-flow the Pb raw material.
【０００４】このフラッシュ製錬用バーナー３０を使用
すると、フラッシュ製錬特有の熱効率を高めることがで
き、その結果、粉コークスを用いてＺｎ・Ｐｂ原料中の
Ｚｎ・Ｐｂを効率良く還元揮発させ、廃棄スラグのＺｎ
品位を３％以下にすることができ、さらに、粉コークス
の燃焼率、即ちガス化率を９０％以上にすることができ
る優れた性能が得られる。当初、前記フラッシュ精錬用
製錬バーナーを用いて粉コークスのみを燃焼させた時の
ガス化率に較べ、粉コークスとＺｎ・Ｐｂ原料とを同時
に処理して該原料の製錬反応を起こした時のガス化率は
僅かに低下するものの、操業上の誤差要因を考えると両
者には有意差がないと考えられていた。しかし、その後
検討を続けたところ、粉コークスのみを燃焼させた場合
に較べ、Ｚｎ・Ｐｂ原料を同時処理することで粉コーク
スのガス化率は１〜２％程度低下することが明らかにな
った。そこで、Ｚｎ・Ｐｂ原料を処理するに際して粉コ
ークスのガス化率を低下させないフラッシュ製錬バーナ
ーの開発が待ち望まれていた。The use of this flash smelting burner 30 can enhance the thermal efficiency peculiar to flash smelting, and as a result, the coke dust is used to efficiently reduce and volatilize Zn.Pb in the Zn.Pb raw material, Waste slag Zn
Excellent performance can be obtained in which the quality can be reduced to 3% or less and the burning rate of the powder coke, that is, the gasification rate can be increased to 90% or more. Initially, when the powder coke and Zn / Pb raw material are simultaneously treated to cause a smelting reaction of the raw material, as compared with the gasification rate when only the fine coke is burned using the smelting burner for flash refining. Although the gasification rate of No. 2 slightly decreased, it was considered that there was no significant difference between the two considering the error factors in operation. However, after further study, it became clear that the gasification rate of the powder coke is reduced by about 1 to 2% by simultaneously treating the Zn.Pb raw material as compared with the case of burning only the powder coke. . Therefore, development of a flash smelting burner that does not reduce the gasification rate of powder coke when processing a Zn / Pb raw material has been long awaited.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、Ｚｎ
・Ｐｂ原料を装入しても粉状燃料のガス化率が低下しな
いフラッシュ製錬用バーナーの提供にある。The object of the present invention is to provide Zn
-To provide a flash smelting burner in which the gasification rate of powdered fuel does not decrease even when Pb raw material is charged.
【０００６】[0006]
【課題を解決するための手段】粉状燃料をガス化させる
反応空間と、この反応空間で生成したＣＯ含有還元性ガ
スを用いＺｎ・Ｐｂ原料を還元する反応空間を実質的に
区別することで、上記目的が達成できると考え本発明に
至った。本発明にかかるフラッシュ製錬用バーナーは、
Ｚｎ及び／又はＰｂの酸化物を含有する粉状原料及び／
又は該酸化物を含有する熔融スラグ（Ｚｎ・Ｐｂ原料）
を処理して、ＺｎとＰｂを蒸気として還元性ガスととも
に炉外に取り出すＺｎ・Ｐｂ製錬用還元炉で使用するフ
ラッシュ製錬用バーナーにおいて、中央部に孔を有する
天井が設けられた上部燃焼筒と、上部にノズルが設けら
れ下端が前記上部燃焼筒の天井の孔に接合された予混合
管と、該上部燃焼筒の天井に設けられた副混合管と、中
央部に該上部燃焼筒と接続される孔を有する天井に該上
部燃焼筒の下端が接合された下部燃焼筒と、該下部燃焼
筒の天井に設けられた原料装入管とからなり、前記予混
合管の中心軸に対して直交するように前記上部燃焼筒の
天井と下部燃焼筒の天井とが設けられ、前記予混合管と
前記上部燃焼筒と前記下部燃焼筒の中心軸が実質的に同
じになるように配置されている。By substantially distinguishing a reaction space for gasifying powdered fuel and a reaction space for reducing a Zn / Pb raw material using a CO-containing reducing gas generated in this reaction space, The present invention has been accomplished on the assumption that the above object can be achieved. The flash smelting burner according to the present invention,
Powdery raw material containing Zn and / or Pb oxide and / or
Alternatively, molten slag containing the oxide (Zn / Pb raw material)
In a flash smelting burner used in a Zn / Pb smelting reduction furnace that takes out Zn and Pb as vapor together with a reducing gas to the outside of the furnace by treating upper part with a ceiling with a hole in the center. A cylinder, a premixing pipe having a nozzle provided at the upper end and a lower end joined to a hole in the ceiling of the upper combustion cylinder, a sub-mixing pipe provided at the ceiling of the upper combustion cylinder, and the upper combustion cylinder at the center. A lower combustion cylinder in which the lower end of the upper combustion cylinder is joined to a ceiling having a hole connected to the lower combustion cylinder, and a raw material charging pipe provided in the ceiling of the lower combustion cylinder, the central axis of the premixing pipe being The ceiling of the upper combustion cylinder and the ceiling of the lower combustion cylinder are provided so as to be orthogonal to each other, and the premixing pipe, the upper combustion cylinder, and the lower combustion cylinder are arranged such that their central axes are substantially the same. Has been done.
【０００７】また、本発明にかかるフラッシュ製錬用バ
ーナーは、Ｚｎ及び／又はＰｂの酸化物を含有する粉状
原料及び／又は該酸化物を含有する熔融スラグからなる
Ｚｎ・Ｐｂ原料を処理して、ＺｎとＰｂを蒸気として還
元性ガスとともに炉外に取り出すＺｎ・Ｐｂ製錬用還元
炉で使用するフラッシュ製錬用バーナーにおいて、粉状
燃料及び酸化性気体の気流を生じ、開口から放出させる
予混合管と、該予混合管の開口から放出される円錐状の
気流を受け入れる内壁を有する上部燃焼筒と、上部燃焼
筒の下流側にあって上部燃焼筒より出る気流を受け入れ
る内壁を有する下部燃焼筒と、上部燃焼筒の円筒状壁と
円錐状気流との間の空間に粉状燃料を入れる副混合管
と、下部燃焼筒の円筒状壁と円錐状気流との間の空間に
Ｚｎ・Ｐｂ原料を入れる原料導入管とを有し、予混合管
と上部燃焼筒の内壁と下部燃焼筒の内壁との中心軸が実
質的に同じになっていて、予混合管の開口と上部燃焼筒
の内壁の接合面及び上部燃焼筒の内壁と下部燃焼筒の内
壁の接合面が前記中心軸に直交している。The flash smelting burner according to the present invention treats a powdery raw material containing an oxide of Zn and / or Pb and / or a Zn.Pb raw material consisting of a molten slag containing the oxide. In a flash smelting burner used in a Zn / Pb smelting reduction furnace that takes out Zn and Pb as vapor together with a reducing gas to the outside of the furnace, a stream of powdered fuel and oxidizing gas is generated and released from an opening. A premixing tube, an upper combustion cylinder having an inner wall that receives a conical airflow discharged from the opening of the premixing tube, and a lower portion that has an inner wall that is downstream of the upper combustion cylinder and that receives an airflow that exits from the upper combustion cylinder. In the space between the cylindrical wall of the upper combustion cylinder and the conical air flow, the sub-mixing tube for putting the powdered fuel into the space between the cylindrical wall of the upper combustion cylinder and the conical air flow, Enter Pb raw material And a central axis of the inner wall of the upper combustion cylinder and the inner wall of the lower combustion cylinder are substantially the same, and the opening of the premixing pipe and the inner wall of the upper combustion cylinder are The joint surface and the joint surface between the inner wall of the upper combustion cylinder and the inner wall of the lower combustion cylinder are orthogonal to the central axis.
【０００８】さらに、上記フラッシュ製錬用バーナーに
おいて、予混合管の内径をｄｍｍ、上部燃焼筒の内径を
Ｄ1ｍｍ、長さをＬ1ｍｍ、下部燃焼筒の内径をＤ2ｍ
ｍ、 長さをＬ2ｍｍとした時に、 Ｄ1よりＤ2が大き
く、かつ下記の［式５］及び［式６］で求めたα及びβ
が５〜２０度とするのが好ましい。 ｔａｎα＝〔（Ｄ1−ｄ）／２〕／Ｌ1 ［式５］ ｔａｎβ＝〔（Ｄ2−ｄ）／２〕／（Ｌ1＋Ｌ2） ［式６］Further, in the above flash smelting burner, the inner diameter of the premixing tube is d mm, the inner diameter of the upper combustion tube is D 1 mm, the length is L 1 mm, and the inner diameter of the lower combustion tube is D 2 m.
where m and length are L 2 mm, D 2 is larger than D 1 and α and β obtained by the following [Equation 5] and [Equation 6]
Is preferably 5 to 20 degrees. tan α = [(D 1 −d) / 2] / L 1 [Equation 5] tan β = [(D 2 −d) / 2] / (L 1 + L 2 ) [Equation 6]
【０００９】さらに、上記フラッシュ製錬用バーナーに
おいて、［式７］及び［式８］で求めたＡ及びＢの値が
０〜１００ｍｍとするのが好ましい。 ｔａｎ１２゜＝｛〔（Ｄ1−ｄ）／２〕−Ａ｝／Ｌ1 ［式７］ ｔａｎ１２゜＝｛〔（Ｄ2−ｄ）／２〕−Ｂ｝／（Ｌ1＋Ｌ2） ［式８］Further, in the flash smelting burner, it is preferable that the values of A and B obtained by [Equation 7] and [Equation 8] be 0 to 100 mm. tan 12 ° = {[(D 1 −d) / 2] −A} / L 1 [Formula 7] tan 12 ° = {[(D 2 −d) / 2] −B} / (L 1 + L 2 ) [Formula 7] 8]
【００１０】さらに、上記フラッシュ製錬用バーナーに
おいて、複数個の副混合管を上部燃焼筒外周と予混合管
との間の天井に、予混合管と円芯円状で等間隔となるよ
うに設けることが好ましい。さらに、上記フラッシュ製
錬用バーナーにおいて、複数個の原料装入管を下部燃焼
筒外周と上部燃焼筒外周との間の天井に、予混合管と同
芯円状で等間隔となるように設けることが好ましい。。
さらに、上記フラッシュ製錬用バーナーにおいて、予混
合管と副混合管から炭素系粉状固体燃料を、また原料装
入管からＺｎ・Ｐｂ原料を炉内に装入するのが望まし
い。Further, in the above-mentioned flash smelting burner, a plurality of sub-mixing pipes are arranged on the ceiling between the outer periphery of the upper combustion cylinder and the pre-mixing pipe so that they are circular-circular and equidistant from each other. It is preferable to provide. Further, in the above-mentioned flash smelting burner, a plurality of raw material charging pipes are provided on the ceiling between the outer periphery of the lower combustion cylinder and the outer periphery of the upper combustion cylinder so as to be concentric with the premixing pipe and at equal intervals. It is preferable. .
Further, in the above flash smelting burner, it is desirable to charge the carbon-based powdery solid fuel into the furnace from the premixing pipe and the submixing pipe and the Zn / Pb raw material from the raw material charging pipe.
【００１１】[0011]
【作用】図面を参照して説明する。図１は、本発明の実
施例で使用したフラッシュ製錬用バーナーの構造を示
す。該バーナーは、中央部に孔３を有する天井５が設け
られた上部燃焼筒４と、上部側面にノズル２が設けられ
下端が前記上部燃焼筒の天井５の孔３に接合された予混
合管１と、上部燃焼筒４の天井５に設けられた副混合管
９と、中央部に上部燃焼筒４と同じ径の孔６を有する天
井８に上部燃焼筒４の下端が接合された下部燃焼筒７
と、下部燃焼筒７の天井８に設けられた原料装入管１０
からなり、予混合管１と、上部燃焼筒４の天井５と、下
部燃焼筒７の天井８とが同芯円上に設けられ、予混合管
１と上部燃焼筒４と下部燃焼筒７とは、それらの中心軸
が実質的に同じになるように配置されている。また、天
井５と天井８が、具体的には、予混合管１の下端にある
開口と上部燃焼筒４の天井の内面との接合面、及び上部
燃焼筒４の下端と下部燃焼筒の天井の内面との接合面
が、前記中心軸に対し直交するように配置されている。The operation will be described with reference to the drawings. FIG. 1 shows the structure of a flash smelting burner used in an embodiment of the present invention. The burner comprises an upper combustion tube 4 having a ceiling 5 having a hole 3 in the center thereof, a nozzle 2 provided on an upper side surface, and a lower end joined to a hole 3 of the ceiling 5 of the upper combustion tube. 1, a sub-mixing pipe 9 provided on the ceiling 5 of the upper combustion cylinder 4, and a ceiling 8 having a hole 6 of the same diameter as the upper combustion cylinder 4 at the center, the lower combustion of which the lower end of the upper combustion cylinder 4 is joined. Tube 7
And a raw material charging pipe 10 provided on the ceiling 8 of the lower combustion cylinder 7.
The premixing tube 1, the ceiling 5 of the upper combustion cylinder 4, and the ceiling 8 of the lower combustion cylinder 7 are provided on a concentric circle, and the premixing tube 1, the upper combustion cylinder 4, and the lower combustion cylinder 7 are provided. Are arranged such that their central axes are substantially the same. Further, the ceiling 5 and the ceiling 8 are, specifically, a joint surface between the opening at the lower end of the premixing tube 1 and the inner surface of the ceiling of the upper combustion cylinder 4, and the lower end of the upper combustion cylinder 4 and the ceiling of the lower combustion cylinder. The joint surface with the inner surface of is orthogonal to the central axis.
【００１２】予混合管１の内径ｄを１００ｍｍとし、上
部燃焼筒の内径Ｄ1 を３００ｍｍ、長さを４３０ｍｍと
し、また下部燃焼筒の内径Ｄ2 を５００ｍｍ、長さを５
００ｍｍとしてある。そして［式５］により求めたαが
１３゜、［式６］より求めたβが１２゜、［式７］より
求めたＡが８．６ｍｍ、［式８］より求めたＢの値が
２．３ｍｍとなっている。なお、［式７］及び［式８］
で求めたＡ及びＢは、各々上部燃焼筒下端の側壁及び下
部燃焼筒下端の側壁と、予混合管から吹込まれた気体が
形成する円錘状の気流の外周との間隔を示す値である。The inner diameter d of the premixing tube 1 is 100 mm, the inner diameter D 1 of the upper combustion cylinder is 300 mm and the length is 430 mm, and the inner diameter D 2 of the lower combustion cylinder is 500 mm and the length is 5 mm.
It is set to 00 mm. Then, α obtained from [Equation 5] is 13 °, β obtained from [Equation 6] is 12 °, A obtained from [Equation 7] is 8.6 mm, and B obtained from [Equation 8] is 2 It is 0.3 mm. [Equation 7] and [Equation 8]
A and B obtained in step 1 are values indicating the distance between the side wall at the lower end of the upper combustion cylinder and the side wall at the lower end of the lower combustion cylinder, and the outer circumference of the conical air flow formed by the gas blown from the premixing tube. .
【００１３】上記フラッシュ製錬用バーナーの使用に際
しては、予混合管１の上端１１より粉状燃料を流送用空
気を用いて予混合管１内に吹込み、ノズル２より工業用
酸素を吹き込み、また副混合管９から粉状燃料の一部を
流送用空気を用いて上部燃焼筒４内に吹込み、原料装入
管１０からＺｎ・Ｐｂ原料を空気流送によて下部燃焼筒
７内に吹込む。この際、上部燃焼筒４内において、図２
に示すように、粉状燃料と燃焼用気体とが予混合管１か
ら吐出されると、上記円錘状の気流の外周１５と上部燃
焼筒４の内壁で囲まれた空間１６に再循環流１８が形成
され、これにより気体の実質的な滞留時間の延長が図れ
る。そこで粉状燃料の一部を副混合管９から上記再循環
流の内に装入し、粉状燃料とガスの滞留時間を長くし
［式９］のブルドワ反応を促進させることで、粉状燃料
のガス化率を向上させることができる。 Ｃ＋ＣＯ2→２ＣＯ ［式９］When the above flash smelting burner is used, powder fuel is blown into the premixing pipe 1 from the upper end 11 of the premixing pipe 1 by using the air for feeding, and industrial oxygen is blown from the nozzle 2. In addition, a part of the powdered fuel is blown into the upper combustion cylinder 4 from the sub-mixing pipe 9 by using the flow air, and the Zn / Pb raw material is blown from the raw material charging pipe 10 to the lower combustion pipe by the air flow. Blow into 7. At this time, in the upper combustion cylinder 4,
As shown in FIG. 4, when the powdered fuel and the combustion gas are discharged from the premixing pipe 1, the recirculation flow into the space 16 surrounded by the outer periphery 15 of the conical airflow and the inner wall of the upper combustion cylinder 4. 18 is formed, whereby the substantial residence time of gas can be extended. Therefore, a part of the pulverized fuel is charged from the sub-mixing tube 9 into the recirculation flow to prolong the residence time of the pulverized fuel and gas to accelerate the Bulldower reaction of [Equation 9], and The gasification rate of fuel can be improved. C + CO 2 → 2CO [Formula 9]
【００１４】一方、予混合管１の先端付近では粉状燃料
と燃焼用気体の広がり角度２θはほぼ同じであり、角度
θは吐出速度により変化するものの５〜２０゜である。
ちなみに、粉状燃料としてコークスを用いた場合、コー
クスによる予混合管内面の磨耗が問題とならない吐出速
度におけるθは１２゜である。広がり角度２θを頂角と
する円錘状気流の外周１５と上部燃焼筒４の下端との位
置関係により、上記再循環流の強さと上部燃焼筒の寿命
が決まる。即ち、上部燃焼筒４の下端が円錘状気流中に
進入すればするほど、つまり［式７］で求めたＡの値が
小さくなるほど再循環流は強くなり、上部燃焼筒４の寿
命は短くなる。逆に、Ａが大きくなるほど再循環流は急
速に弱まり、上部燃焼筒４の寿命は長くなる。On the other hand, in the vicinity of the tip of the premixing pipe 1, the spread angle 2θ of the powdered fuel and the combustion gas is almost the same, and the angle θ is 5 to 20 ° although it varies depending on the discharge speed.
By the way, when coke is used as the powdered fuel, θ is 12 ° at the discharge speed at which abrasion of the inner surface of the premixing tube due to coke does not pose a problem. The strength of the recirculation flow and the life of the upper combustion cylinder are determined by the positional relationship between the outer circumference 15 of the conical airflow having the divergence angle 2θ as the apex angle and the lower end of the upper combustion cylinder 4. That is, as the lower end of the upper combustion cylinder 4 enters into the conical air flow, that is, the smaller the value of A obtained by [Equation 7], the stronger the recirculation flow and the shorter the life of the upper combustion cylinder 4. Become. On the contrary, the larger A becomes, the more rapidly the recirculation flow weakens and the longer the life of the upper combustion cylinder 4 becomes.
【００１５】αが５〜２０°の範囲内で［式５］を満た
すようにｄ、Ｄ1、Ｌ1を選定するのは、この条件で求め
られた値を用いて作成されたフラッシュ製錬用バーナー
は粉状燃料のガス化率と上部燃焼筒の寿命との関係で、
双方が共に良好となるからである。また、予混合管１の
磨耗が問題とならない吐出速度におけるαは１２゜であ
り、この場合［式７］により求めたＡの値が０〜１００
ｍｍとなるようにｄ、Ｄ1、Ｌ1 を選定すれば燃焼筒の
寿命に対し、より一層効果的である。以上説明した内容
は、本発明者らの出願にかかる特開平５−２０３１１３
号公報に記載されている。The selection of d, D 1 and L 1 so that α satisfies the formula 5 within the range of 5 to 20 ° is carried out by flash smelting prepared by using the values obtained under these conditions. The burner for use has a relationship between the gasification rate of powdered fuel and the life of the upper combustion cylinder.
This is because both are good. Further, at the discharge speed at which the wear of the premixing pipe 1 does not cause a problem, α is 12 °, and in this case, the value of A obtained by [Equation 7] is 0 to 100.
If d, D 1 and L 1 are selected so as to be mm, it is even more effective for the life of the combustion cylinder. The contents described above are related to the application by the present inventors.
No., published in Japanese Unexamined Patent Publication No.
【００１６】さて、特開平６−０２７１９５３号公報に
記載のフラッシュ製錬用バーナーは、副混合管を取付け
た燃焼筒、即ち本願発明でいえば上部燃焼筒４に、Ｚｎ
・Ｐｂ原料を供給する装入管、即ち本願発明でいえば原
料装入管１０を取付けており、粉状燃料とＺｎ・Ｐｂ原
料を共に同一の燃焼筒内に装入している。このような特
開平６−０２７１９５３号公報記載のフラッシュ還元用
バーナーでは、粉状燃料だけを処理した時の粉状燃料の
ガス化率に較べ、Ｚｎ・Ｐｂ原料を同時に処理した時の
粉状燃料のガス化率は約１〜２％低下する。この理由は
次のように考えることができる。粉状燃料のガス化率は
上部燃焼筒内で起こる［式９］のブルドワ反応が促進さ
れることで上昇するが、このブルドワ反応は吸熱反応で
あるためにブルドワ反応を促進させるには反応温度を高
くする必要があり、即ち、粉状燃料の高いガス化率を維
持するには上部燃焼筒内の温度を高く保持しなくてはな
らない。また、上部燃焼筒内にＺｎ・Ｐｂ原料を装入す
ると、該原料の熔解に必要な顕熱や熔解熱等の吸熱、そ
して該原料中のＺｎ及び／又はＰｂの酸化物のＣＯガス
による還元反応に伴う吸熱が生じ、上部燃焼筒内の温度
は低下する。即ち、上記ガス化率の低下の理由は、上部
燃焼筒内にＺｎ・Ｐｂ原料を装入することにより上部燃
焼筒内の温度が低下し、その結果吸熱反応のブルドワ反
応が抑制されるためであると考えられる。The flash smelting burner described in Japanese Patent Application Laid-Open No. 6-0271953 has a combustion cylinder equipped with a sub-mixing tube, that is, the upper combustion cylinder 4 in the present invention.
A charging pipe for supplying the Pb raw material, that is, the raw material charging pipe 10 in the present invention is attached, and both the powder fuel and the Zn / Pb raw material are charged in the same combustion cylinder. In the flash reduction burner described in Japanese Patent Laid-Open No. 6-0271953, compared with the gasification rate of the powder fuel when only the powder fuel is processed, the powder fuel when the Zn / Pb raw material is processed at the same time is used. The gasification rate of is reduced by about 1-2%. The reason for this can be considered as follows. The gasification rate of pulverized fuel rises due to the promotion of the Burdow reaction of [Equation 9] that occurs in the upper combustion cylinder. However, since this Bulldow reaction is an endothermic reaction, the reaction temperature is required to accelerate the reaction. Must be kept high, that is, in order to maintain a high gasification rate of the powdered fuel, the temperature in the upper combustion cylinder must be kept high. In addition, when a Zn / Pb raw material is charged into the upper combustion cylinder, heat absorption such as sensible heat or melting heat necessary for melting the raw material and reduction of Zn and / or Pb oxide in the raw material by CO gas are carried out. Endothermic heat is generated due to the reaction, and the temperature in the upper combustion cylinder decreases. That is, the reason for the lowering of the gasification rate is that the temperature inside the upper combustion cylinder is lowered by charging the Zn.Pb raw material into the upper combustion cylinder, and as a result, the endothermic reaction of the Burdova reaction is suppressed. It is believed that there is.
【００１７】従って、Ｚｎ・Ｐｂ原料の処理に伴うガス
化率の低下を防止するには、粉状燃料のガス化反応が起
こる空間から、Ｚｎ・Ｐｂ原料の還元熔融反応が起こる
空間を分けることが有効である。つまり、フラッシュ製
錬用バーナーの上部で高温度を必要とする粉状燃料のガ
ス化反応を起こさせ、次いで該バーナーの下部でＺｎ・
Ｐｂの還元熔融反応を起こさせることが効果的である。
これを具現化するために、本発明では、下部燃焼筒７を
設置して、ここに原料装入管１０を配置している。原料
装入管１０からＺｎ・Ｐｂ原料を空気流送によって下部
燃焼筒７内に吹込む際、上記［式５］及び［式７］の条
件を満たしておれば、上部燃焼筒４内で形成した上記円
錐状の気流はそのまま円錐状に広がり、下部燃焼筒７内
においても円錐状の気流は保持される。そして、上部燃
焼筒４の内径Ｄ1より下部燃焼筒７の円径Ｄ2を大きくす
ることにより、上部燃焼筒４内と同様に、上記円錐状の
気流の外周１５と下部燃焼筒７の内壁とで囲まれた空間
に再び再循環流１９が形成され、これによって気体の実
質的な滞留時間の延長が図れる。Therefore, in order to prevent a decrease in the gasification rate due to the treatment of the Zn.Pb raw material, the space where the gasification reaction of the powdered fuel takes place is separated from the space where the reduction melting reaction of the Zn.Pb raw material takes place. Is effective. That is, the gasification reaction of powdered fuel that requires high temperature is caused at the upper part of the flash smelting burner, and then Zn.
It is effective to cause a reduction melting reaction of Pb.
In order to realize this, in the present invention, the lower combustion cylinder 7 is installed, and the raw material charging pipe 10 is arranged therein. When the Zn / Pb raw material is blown into the lower combustion cylinder 7 from the raw material charging pipe 10 by air flow, it is formed in the upper combustion cylinder 4 if the conditions of [Equation 5] and [Equation 7] are satisfied. The conical airflow spreads in a conical shape as it is, and the conical airflow is retained even in the lower combustion cylinder 7. Then, by making the circular diameter D 2 of the lower combustion cylinder 7 larger than the inner diameter D 1 of the upper combustion cylinder 4, the outer periphery 15 of the conical airflow and the inner wall of the lower combustion cylinder 7 are the same as in the upper combustion cylinder 4. A recirculation flow 19 is formed again in the space surrounded by and thereby extending the residence time of the gas substantially.
【００１８】そこでＺｎ・Ｐｂ原料を原料装入管１０か
ら下部燃焼筒７に装入することで、上部燃焼筒４で生成
した還元性ガスとＺｎ・Ｐｂ原料の滞留時間を長くし、
該原料のＣＯガスによる還元反応を促進させられる。ま
た、上部燃焼筒４で生成した還元性ガスの高い温度は、
上部燃焼筒４の直下に配置された下部燃焼筒７内におい
ても実質上、保持されており、このため還元性ガスの高
い温度はＺｎ・Ｐｂ原料の還元熔融反応に有効に供する
ことができる。ここで、βが５〜２０゜の範囲内で［式
６］を満たすように、［式８］により求めたＢが０〜１
００ｍｍになるようにｄ、Ｄ2、Ｌ2を選定するのは、上
述した上部燃焼筒の場合と同様に、下部燃焼筒内で形成
される再循環流の強さと、密接なた関係を持つ下部燃焼
筒の寿命との双方が、共に良好となるからである。Therefore, by charging the Zn / Pb raw material from the raw material charging pipe 10 into the lower combustion cylinder 7, the residence time of the reducing gas generated in the upper combustion cylinder 4 and the Zn / Pb raw material is lengthened,
The reduction reaction of the raw material with CO gas can be promoted. Further, the high temperature of the reducing gas generated in the upper combustion cylinder 4 is
The lower combustion cylinder 7 arranged immediately below the upper combustion cylinder 4 is substantially maintained, so that the high temperature of the reducing gas can be effectively used for the reduction melting reaction of the Zn.Pb raw material. Here, B obtained by [Equation 8] is 0 to 1 so that [Equation 6] is satisfied within a range of β of 5 to 20 °.
The selection of d, D 2 and L 2 so as to be 00 mm has a close relationship with the strength of the recirculation flow formed in the lower combustion cylinder, as in the case of the upper combustion cylinder described above. This is because both of the life of the lower combustion cylinder and the life of the lower combustion cylinder are improved.
【００１９】副混合管９と原料装入管１０の数、取付角
度等については特に限定はない。しかし、典型的には、
副混合管９は上部燃焼筒４の天井面に対して垂直に取付
け、原料装入管１０については下部燃焼筒７の天井面に
対して垂直に取り付けるか、又は予混合管１の中心軸上
の点であって下部燃焼筒７の内部に存在する点に全原料
装入管１０の中心軸を一致させるのが良い。副混合管９
と原料装入管１０の取付位置は、上部燃焼筒４及び下部
燃焼筒７内の反応を極力均一に効率良く起こすために、
それぞれ予混合管１と同芯円状で等間隔となるようにす
るのが良い。なお、実施例で使用したフラッシュ製錬用
バーナーには、副混合管９と原料装入管１０をそれぞれ
２本づつ配置した。There are no particular restrictions on the number of sub-mixing pipes 9 and raw material charging pipes 10 and the mounting angles. But typically,
The sub-mixing pipe 9 is attached vertically to the ceiling surface of the upper combustion pipe 4, and the raw material charging pipe 10 is attached vertically to the ceiling surface of the lower combustion pipe 7, or on the central axis of the premixing pipe 1. It is preferable that the central axis of all the raw material charging pipes 10 coincides with the point that exists inside the lower combustion cylinder 7. Sub-mixing tube 9
In order to cause the reaction in the upper combustion cylinder 4 and the lower combustion cylinder 7 as uniformly and efficiently as possible, the mounting positions of the raw material charging pipe 10 and
It is preferable that they are concentric with the premixing tube 1 at equal intervals. Two sub-mixing pipes 9 and two raw material charging pipes 10 were arranged in each of the flash smelting burners used in the examples.
【００２０】[0020]
【実施例】図３は本実施例のバーナーを適用したフラッ
シュ還元炉の断面図であり、内径１．５ｍで高さ２．５
ｍのシャフト２０と、内径１．５ｍで長さ５．２５ｍの
セトラー１０と、内径０．８ｍのアップテーク４０を持
つ。該シャフト２０の天井部には、フラッシュ精錬用バ
ーナー３０の代わりに、図１に示す構造を持つフラッシ
ュ製錬用バーナーを設置し、表１に示す組成を有する原
料等を表２に示す操業条件で処理した。比較例は、粉コ
ークスのみを処理した場合で、該粉コークスを予混合管
１と副混合管９から装入した。また、実施例との比較の
ために、原料装入管１０からは流送空気のみを装入し
た。実施例は、粉コークスを予混合管１と副混合管９と
から、またＺｎ・Ｐｂ原料を原料装入管１０から炉内に
装入した。ガス化率に影響を及ぼすｍ値は、実施例と比
較例とで同一の条件にした。ｍ値＝（実際に供給したＯ
2量）＋（原料の還元により放出したＯ2量）／（粉コー
クス中のＣをＣＯ2に完全燃焼するのに必要な理論Ｏ
2量）結果を表３に示す。Ｃａｓｅ１に較べ、Ｃａｓｅ
２の粉コークスのガス化率の低下は認められず、即ち、
原料を処理しても粉コークスのガス化率は低下しておら
ず、本願発明の優位性が確認された。EXAMPLE FIG. 3 is a sectional view of a flash reduction furnace to which the burner of this example is applied. The inside diameter is 1.5 m and the height is 2.5.
It has a shaft 20 having a diameter of m, a settler 10 having an inner diameter of 1.5 m and a length of 5.25 m, and an uptake 40 having an inner diameter of 0.8 m. A flash smelting burner having the structure shown in FIG. 1 is installed on the ceiling of the shaft 20 in place of the flash smelting burner 30, and raw materials having the composition shown in Table 1 are operated under the operating conditions shown in Table 2. Processed in. In the comparative example, only the powder coke was treated, and the powder coke was charged through the premixing pipe 1 and the sub-mixing pipe 9. Further, for comparison with the example, only the feed air was charged from the raw material charging pipe 10. In the example, the coke powder was charged into the furnace from the premixing tube 1 and the submixing tube 9, and the Zn.Pb raw material was charged into the furnace from the raw material charging tube 10. The m value that affects the gasification rate was set to the same condition in the example and the comparative example. m value = (O actually supplied
2 amount) + (amount of O 2 released by reduction of raw material) / (theoretical O necessary for completely burning C in powder coke into CO 2 )
The results are shown in Table 3. Compared to Case 1, Case
No decrease in the gasification rate of the powder coke of 2 was observed, that is,
Even if the raw material was treated, the gasification rate of the powder coke did not decrease, confirming the superiority of the present invention.
【００２１】 ［表１］ ＜原料、粉コークスの組成（重量％）＞ Ｚｎ Ｐｂ Ｆｅ ＳｉＯ2 Ｃ 原料 ４６．０ ６．９ １４．５ ６．３ − 粉コークス − − １．０ ６．３ ８２．０[0021] [Table 1] <raw material, the composition of the coke (wt%)> Zn Pb Fe SiO 2 C material 46.0 6.9 14.5 6.3 - coke - - 1.0 6.3 82 .0
【００２２】 ［表２］ ＜操業条件＞ 項目 単位 比較例 実施例 （粉コークスのみ） （原料処理） 原料 Ｋｇ／Ｈ ０ ４１８ 原料流送空気 Ｎｍ3／Ｈ ５０ ５０ 粉コークス 予混合管 Ｋｇ／Ｈ ２１９ ２１９ 副混合管 Ｋｇ／Ｈ １１０ １１０ 粉コークス 流送空気 予混合管 Ｎｍ3／Ｈ ４０ ４０ 副混合管 Ｎｍ3／Ｈ ２０ ２０ 工業用酸素 （90％Ｏ2） 予混合管 Ｎｍ3／Ｈ ３７５ ３５２ 副混合管 Ｎｍ3／Ｈ ０ ０ ｍ値 − ０．７４ ０．７４[Table 2] <Operating conditions> Item Unit Comparative example Example (powder coke only) (raw material treatment) Raw material Kg / H 0 418 Raw material feed air Nm 3 / H 50 50 Powder coke Premixing pipe Kg / H 219 219 Sub-mixing pipe Kg / H 110 110 Powder coke Sending air Pre-mixing pipe Nm 3 / H 40 40 Sub-mixing pipe Nm 3 / H 20 20 Industrial oxygen (90% O 2 ) Pre-mixing pipe Nm 3 / H 375 352 sub-mixing tube Nm 3 / H 0 0 m value −0.74 0.74
【００２３】 ［表３］ ＜結果＞ 生成スラグ組成 スラグ温度 排ガス 粉コークス 試験 （重量％） （℃） ＣＯ2／ＣＯ ガス化率 Ｚｎ Ｐｂ （％） 比較例 − − − １．３２ ９４．１ 実施例 １．５ ０．１ １４０８ １．３４ ９４．３[Table 3] <Results> Product slag composition Slag temperature Exhaust gas Powder coke test (% by weight) (° C) CO 2 / CO gasification rate Zn Pb (%) Comparative example --- 1.32 94.1 Implementation Example 1.5 0.1 1408 1.34 94.3
【００２４】[0024]
【発明の効果】本発明のフラッシュ製錬用バーナーを用
いることで、Ｚｎ・Ｐｂ原料を処理することによる粉コ
ークスのガス化率の低下を防ぐことができる。By using the burner for flash smelting of the present invention, it is possible to prevent the gasification rate of the powder coke from being lowered by treating the Zn.Pb raw material.
【図１】本発明にかかるフラッシュ精錬用バーナーを示
す断面図である。FIG. 1 is a cross-sectional view showing a flash refining burner according to the present invention.
【図２】予混合管から吐出される粉状燃料と燃焼用気体
の広がり角度を示すための予混合管先端部の断面図であ
る。FIG. 2 is a cross-sectional view of the tip of the premixing tube for showing the spread angle of the powdered fuel and the combustion gas discharged from the premixing tube.
【図３】本発明にかかるフラッシュ精錬用バーナーを適
用するフラッシュ還元炉の断面図である。FIG. 3 is a cross-sectional view of a flash reduction furnace to which a flash refining burner according to the present invention is applied.
【図４】従来のフラッシュ精錬用バーナーの一例を示す
断面図である。FIG. 4 is a sectional view showing an example of a conventional flash refining burner.
１ 予混合管 ２ ノズル ３ 孔 ４ 上部燃焼筒 ５ 上部燃焼筒の天井 ６ 孔 ７ 下部燃焼筒 ８ 下部燃焼筒の天井 ９ 副混合管 １０ 原料装入管 １１ 上端 ｄ 予混合管の内径 Ｄ1 上部燃焼筒の内径 Ｄ2 下部燃焼筒の内径 Ｌ1 上部燃焼筒の長さ Ｌ2 下部燃焼筒の長さ1 Premixing Tube 2 Nozzle 3 Hole 4 Upper Combustion Cylinder 5 Upper Combustion Cylinder Ceiling 6 Hole 7 Lower Combustion Cylinder 8 Lower Combustion Cylinder Ceiling 9 Submixing Pipe 10 Raw Material Charge Pipe 11 Upper End d Premixing Pipe Inner Diameter D 1 Upper Inner diameter of combustion cylinder D 2 Inner diameter of lower combustion cylinder L 1 Length of upper combustion cylinder L 2 Length of lower combustion cylinder
Claims (7)
粉状原料及び／又は該酸化物を含有する熔融スラグを処
理して、ＺｎとＰｂを蒸気として還元性ガスとともに炉
外に取り出すＺｎ・Ｐｂ製錬用還元炉で使用するフラッ
シュ製錬用バーナーにおいて、中央部に孔を有する天井
が設けられた上部燃焼筒と、上部にノズルが設けられ下
端が前記上部燃焼筒の天井の孔に接合された予混合管
と、該上部燃焼筒の天井に設けられた副混合管と、中央
部に該上部燃焼筒と接続する孔を有する天井に該上部燃
焼筒の下端が接合された下部燃焼筒と、該下部燃焼筒の
天井に設けられた原料装入管からなり、前記予混合管の
中心軸に対して直交するように前記上部燃焼筒の天井と
下部燃焼筒の天井とが設けられ、前記予混合管と前記上
部燃焼筒と前記下部燃焼筒の中心軸が実質的に同じにな
るように配置されたフラッシュ製錬用バーナー。1. A Zn raw material containing an oxide of Zn and / or Pb and / or a molten slag containing the oxide is treated to take Zn and Pb as vapor together with a reducing gas out of the furnace. -In a flash smelting burner used in a Pb smelting reduction furnace, an upper combustion cylinder provided with a ceiling having a hole in the center, and a nozzle provided at the upper part with a lower end in a hole in the ceiling of the upper combustion cylinder Lower combustion in which a premixing pipe joined, a sub-mixing pipe provided in the ceiling of the upper combustion pipe, and a ceiling having a hole connecting to the upper combustion pipe in the central portion, the lower end of the upper combustion pipe is joined A cylinder and a raw material charging pipe provided on the ceiling of the lower combustion cylinder, and the ceiling of the upper combustion cylinder and the ceiling of the lower combustion cylinder are provided so as to be orthogonal to the central axis of the premixing pipe. , The premixing tube, the upper combustion tube, and the lower combustion tube A flash smelting burner arranged so that the central axes of the burning cylinders are substantially the same.
粉状原料及び／又は該酸化物を含有する熔融スラグから
なるＺｎ・Ｐｂ原料を処理して、ＺｎとＰｂを蒸気とし
て還元性ガスとともに炉外に取り出すＺｎ・Ｐｂ製錬用
還元炉で使用するフラッシュ製錬用バーナーにおいて、
粉状燃料及び酸化性気体の気流を生じ、開口から放出さ
せる予混合管と、該予混合管の開口から放出される円錐
状の気流を受け入れる内壁を有する上部燃焼筒と、上部
燃焼筒の下流側にあって上部燃焼筒より出る気流を受け
入れる内壁を有する下部燃焼筒と、上部燃焼筒の内壁と
円錐状気流との間の空間に粉状燃料を入れる副混合管
と、下部燃焼筒の内壁と円錐状気流との間の空間にＺｎ
・Ｐｂ原料を入れる原料導入管とを有し、予混合管と上
部燃焼筒の内壁と下部燃焼筒の内壁との中心軸が実質的
に同じになっていて、予混合管の開口と上部燃焼筒の内
壁の接合面及び上部燃焼筒の内壁と下部燃焼筒の内壁の
接合面が前記中心軸に直交しているフラッシュ製錬用バ
ーナー。2. A powdery raw material containing an oxide of Zn and / or Pb and / or a Zn.Pb raw material composed of molten slag containing the oxide is treated to obtain a reducing gas using Zn and Pb as vapor. In the flash smelting burner used in the Zn / Pb smelting reduction furnace taken out of the furnace with
A premixing tube that generates a flow of powdered fuel and an oxidizing gas and discharges it from an opening, an upper combustion cylinder having an inner wall that receives a conical airflow discharged from the opening of the premixing pipe, and a downstream of the upper combustion cylinder. Lower combustion cylinder having an inner wall for receiving the airflow exiting from the upper combustion cylinder, a sub-mixing pipe for putting powdered fuel into the space between the inner wall of the upper combustion cylinder and the conical airflow, and the inner wall of the lower combustion cylinder In the space between
A raw material introduction pipe for containing a Pb raw material, and the central axes of the premixing pipe, the inner wall of the upper combustion cylinder and the inner wall of the lower combustion pipe are substantially the same, and the opening of the premixing pipe and the upper combustion pipe A burner for flash smelting in which the joint surface of the inner wall of the cylinder and the joint surface of the inner wall of the upper combustion cylinder and the inner wall of the lower combustion cylinder are orthogonal to the central axis.
用バーナーにおいて、予混合管の内径をｄｍｍ、上部燃
焼筒の内径をＤ1ｍｍ、長さをＬ1ｍｍ、下部燃焼筒の内
径をＤ2ｍｍ、長さをＬ2ｍｍとした時に、Ｄ1よりＤ2が
大きく、かつ下記の［式１］及び［式２］で求めたα及
びβが５〜２０度となることを特徴としたフラッシュ製
錬用バーナー。 ｔａｎα＝〔（Ｄ1−ｄ）／２〕／Ｌ1 ［式１］ ｔａｎβ＝〔（Ｄ2−ｄ）／２〕／（Ｌ1＋Ｌ2） ［式２］3. The flash smelting burner according to claim 1, wherein the inner diameter of the premixing tube is d mm, the inner diameter of the upper combustion tube is D 1 mm, the length is L 1 mm, and the inner diameter of the lower combustion tube. the D 2 mm, the length is taken as L 2 mm, than D 1 D 2 is large and the following [formula 1] and that [equation 2] obtained α and β is 5 to 20 degrees A special flash smelting burner. tan α = [(D 1 −d) / 2] / L 1 [Equation 1] tan β = [(D 2 −d) / 2] / (L 1 + L 2 ) [Equation 2]
用バーナーにおいて、［式３］及び［式４］で求めたＡ
及びＢの値が０〜１００ｍｍとなることを特徴としたフ
ラッシュ製錬用バーナー。 ｔａｎ１２゜＝｛〔（Ｄ1−ｄ）／２〕−Ａ｝／Ｌ1 ［式３］ ｔａｎ１２゜＝｛〔（Ｄ2−ｄ）／２〕−Ｂ｝／（Ｌ1＋Ｌ2） ［式４］4. The flash smelting burner according to claim 1, wherein A determined by [Equation 3] and [Equation 4]
And a value of B are 0 to 100 mm, a burner for flash smelting. tan12 ° = {[(D 1 −d) / 2] −A} / L 1 [Formula 3] tan 12 ° = {[(D 2 −d) / 2] −B} / (L 1 + L 2 ) [Formula 3] 4]
ナーにおいて、複数個の副混合管を上部燃焼筒外周と予
混合管との間の天井に、予混合管と円芯円状で等間隔と
なるように設けたことを特徴とするフラッシュ製錬用バ
ーナー。5. The flash smelting burner according to claim 1, wherein a plurality of sub-mixing tubes are provided on the ceiling between the outer periphery of the upper combustion tube and the pre-mixing tube, and the pre-mixing tube and the circular core are circular. A flash smelting burner characterized by being provided at intervals.
ナーにおいて、複数個の原料装入管を下部燃焼筒外周と
上部燃焼筒外周との間の天井に、予混合管と同芯円状で
等間隔となるように設けたことを特徴とするフラッシュ
製錬用バーナー。6. The burner for flash smelting according to claim 1, wherein a plurality of raw material charging pipes are concentric with the premixing pipe on the ceiling between the outer periphery of the lower combustion cylinder and the outer periphery of the upper combustion cylinder. A flash smelting burner characterized by being installed at equal intervals.
ュ製錬用バーナーにおいて、予混合管と副混合管から炭
素系粉状固体燃料を、また原料装入管からＺｎ・Ｐｂ原
料を炉内に装入することを特徴とするフラッシュ製錬用
バーナー。7. The flash smelting burner according to any one of claims 1 to 6, wherein the carbon-based powdery solid fuel is fed from the premixing pipe and the submixing pipe, and the Zn / Pb raw material is fed from the raw material charging pipe. A flash smelting burner characterized by being charged inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05520695A JP3569996B2 (en) | 1995-02-21 | 1995-02-21 | Flash smelting burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05520695A JP3569996B2 (en) | 1995-02-21 | 1995-02-21 | Flash smelting burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08226614A true JPH08226614A (en) | 1996-09-03 |
| JP3569996B2 JP3569996B2 (en) | 2004-09-29 |
Family
ID=12992190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05520695A Expired - Lifetime JP3569996B2 (en) | 1995-02-21 | 1995-02-21 | Flash smelting burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3569996B2 (en) |
-
1995
- 1995-02-21 JP JP05520695A patent/JP3569996B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3569996B2 (en) | 2004-09-29 |
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