JPS58210110A - Device for transporting preliminarily reduced powder and granular ore in melt reduction installation - Google Patents
Device for transporting preliminarily reduced powder and granular ore in melt reduction installationInfo
- Publication number
- JPS58210110A JPS58210110A JP9309482A JP9309482A JPS58210110A JP S58210110 A JPS58210110 A JP S58210110A JP 9309482 A JP9309482 A JP 9309482A JP 9309482 A JP9309482 A JP 9309482A JP S58210110 A JPS58210110 A JP S58210110A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- ore
- reduction furnace
- reduced ore
- transport
- 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.)
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Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
- C21B13/002—Reduction of iron ores by passing through a heated column of carbon
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
融還元する設備において、予備還元炉から予備還元鉱石
を溶融還元炉内へ輸送する装置に関するものである◇
近年、各種の金属酸化物を含有する鉱石原料は塊状鉱石
が減少し、粉状若しくは小粒状鉱石が多くなっており、
今後ますます粉粒状鉱石の比率が増加して行く傾向にあ
る。従来方法では、粉粒状鉱石はバインダー及び炭材を
添加してペレットや焼結鉱などの塊状物として使用する
ので、その塊成化のために余分の資源やエネルギーを必
要とするばかりでなく、焼成を必要とする場合には、焼
成炉から排出されるガス中のＮＯｘ、ＢＯＸ及びダスト
等を処理するための費用も多大であるという欠点がある
。またクロム鉱石の製錬による７エロクロムの製造のよ
うに、電気炉で製錬する場合には、電力原単位が数千Ｋ
Ｗ Ｈ／ ｔにも達して、電力料金′の高いところでは
きわめてコスト高になる。[Detailed description of the invention] This relates to a device for transporting pre-reduced ore from a pre-reduction furnace to a smelting-reduction furnace in a smelting-reduction facility.◇ In recent years, ore raw materials containing various metal oxides have been produced in the form of lump ore. The amount of ore has decreased, and powdery or small granular ore has increased.
The proportion of powdery ore will continue to increase in the future. In the conventional method, granular ore is used as agglomerates such as pellets and sintered ore by adding a binder and carbonaceous material, which not only requires extra resources and energy for agglomeration. When firing is required, there is a drawback that the cost for treating NOx, BOX, dust, etc. in the gas discharged from the firing furnace is also large. In addition, when smelting is carried out in an electric furnace, as in the production of 7-erochromium by smelting chromium ore, the power consumption per unit is several thousand K.
This can reach W H/t, making the cost extremely high in areas where electricity rates are high.
本発明者らは先に、粉粒状鉱石を塊成化することなしに
直接使用でき、かつ電力を用いずに溶融全問を製造でき
る方法を発明した（特願昭３６−６３λりｌＩ 号 ）
。The present inventors previously invented a method that can directly use powdered ore without agglomerating it, and can produce melted ore without using electricity (Patent Application No. 1983-63)
.
この発明の骨子は、予備還元炉において粉粒状鉱石を流
動層形式で予備的に還元し、得られた粉粒状予備還元鉱
石を、上下一段にそれぞれ複数個設けられた羽目を備え
、炭素系固体還元剤の充填Ｍを形成した縦型の溶融還元
炉に移送し、これを前記羽目から該溶融還元炉内に高温
空気と共に吹込み、これを溶融還元する、という金ｍ酸
化物を含有する粉粒状鉱石からの溶融金属の製造方法で
ある。The gist of this invention is to preliminarily reduce granular ore in a fluidized bed format in a pre-reducing furnace, and convert the obtained granular pre-reduced ore into a carbonaceous solid by providing a plurality of linings in each of the upper and lower stages. A powder containing gold m oxide is transferred to a vertical smelting reduction furnace in which a filling M of reducing agent is formed, and the powder is blown into the smelting reduction furnace together with high-temperature air to melt and reduce the powder. This is a method for producing molten metal from granular ore.
しかして予備還元炉と溶融還元炉とから成る溶融還元設
備において、予備還元炉から溶融還元炉への粉粒鉱石の
輸送については、通常の粉体輸送と比較して次のような
条件が満足される必要がある。Therefore, in a smelting reduction facility consisting of a pre-reduction furnace and a smelting reduction furnace, the following conditions are satisfied when transporting powdered ore from the pre-reduction furnace to the smelting reduction furnace compared to normal powder transport. need to be done.
０−）予備還元鉱石は、予備還元炉から高温で排出され
ること。0-) The pre-reduced ore is discharged from the pre-reduced furnace at a high temperature.
（２）予備還元鉱石の温度低下を少なくするための配慮
を要すること。(2) Consideration must be taken to reduce the temperature drop of the pre-reduced ore.
（３）予備還元鉱石を予備還元炉から溶融還元炉の多数
の羽口へ分岐して均等に分配すること。(3) Branching and evenly distributing the pre-reduced ore from the pre-reducing furnace to a number of tuyeres of the smelting reduction furnace.
（４）予備還元炉よりも、予備還元鉱石を吹込む前記羽
目部分の方が内圧力が高いので、これによる輸送管内で
の粉体による閉そくや粉体の逆流を防止できること。(4) Since the inner pressure is higher in the lining portion into which the pre-reduced ore is injected than in the pre-reduction furnace, blockage caused by powder in the transport pipe and backflow of powder due to this can be prevented.
（６）予備還元鉱石輸送用のキャリヤーガスは、粉体と
共に溶融還元炉内へ吹込まれるので、できるだけ少量が
望ましいこと。(6) Since the carrier gas for transporting the pre-reduced ore is blown into the smelting reduction furnace together with the powder, it is desirable that the carrier gas be as small as possible.
（６） ｆｉｌｌ送途中での予備還元鉱石の再酸化を
防止できること。(6) It is possible to prevent re-oxidation of the pre-reduced ore during filling.
（７）予備還元炉と溶融還元炉間の粒子輸送系を通じて
の静的、動的な干渉が少ないこと。(7) There is little static and dynamic interference through the particle transport system between the preliminary reduction furnace and the smelting reduction furnace.
本発明の目的は、以上のような特別な条件を充。The purpose of the present invention is to satisfy the above special conditions.
足することによって溶融還元設備において粉粒状の予備
還元鉱石の輸送を有効にかつ円滑に安定して行うことが
できる装置を提供することにある。The object of the present invention is to provide a device that can effectively, smoothly, and stably transport powdery pre-reduced ore in a smelting reduction facility.
すなわち、本発明の要旨は次のとおりである。That is, the gist of the present invention is as follows.
粉粒状鉱石から溶融金属を製造するための、予備還元鉱
石
吹込むための複数の羽目を備えた溶融還元炉とから成る
溶融還元設備において、該予備還元炉に単一の予（４＃
還元鉱石排出口を設け、該予備還元炉と該溶融還元炉と
の間に予備還元鉱石の受槽を設け、該予備還元炉の前記
υト出口と該受槽とを単一の輸送管で連絡し、更に咳受
槽と前記溶融還元炉に設けた前記複数の羽【］又は送送
風管とを羽口数と同数の輸送分岐管で連絡し、かつ該輸
送分岐管の途中に搬送ガスの吹込み口を設けたことを特
徴とする、溶融ｉｉ１元設備における粉粒状予備還元鉱
石の輸送装置。In a smelting reduction equipment for producing molten metal from powder ore, the pre-reduction furnace is equipped with a single pre-reduction furnace (4#).
A reduced ore discharge port is provided, a receiving tank for the pre-reduced ore is provided between the pre-reducing furnace and the smelting reduction furnace, and a single transport pipe connects the outlet of the pre-reducing furnace with the receiving tank. , furthermore, the cough receiving tank and the plurality of blades provided in the smelting-reduction furnace or the blowing pipe are connected through a transport branch pipe of the same number as the number of tuyere, and a carrier gas inlet is provided in the middle of the transport branch pipe. An apparatus for transporting powdery pre-reduced ore in a melting II single source facility, characterized in that it is provided with:
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
まづ第１図に示す溶融還元設備に基づいて説明する。First, explanation will be given based on the melting reduction equipment shown in FIG.
粉粒状の金員酸化物を含有する鉱石が、供給装置Ｊから
予備還元炉ｌに供給される。縦型の溶融還元炉コから排
出される高温還元ガスの一部または全部が、予備還元炉
／の底部に導入され、必要に応じて供給径路グから粉粒
状の７ラツクス、固体還元剤及び還元ガスなどが供給さ
れて、流動層形式によって、粉粒状鉱石が乾燥−加熱、
予備還元される０予備還元鉱石は、７ラツクスなどとと
もに、排出口３より排出され、輸送管６により受槽７に
自重によって輸送される。受槽７から該鉱石は輸送分岐
管ｔを経て送風支管１０又は溶融還元炉１゛の羽目部／
／に送給された後、羽口先から高温空気と共に溶融還元
炉コ内に吹込まれる。Ore containing powdery gold oxide is supplied from a supply device J to a preliminary reduction furnace I. A part or all of the high-temperature reducing gas discharged from the vertical smelting reduction furnace is introduced into the bottom of the pre-reduction furnace, and is optionally supplied with powdered 7LAx, solid reducing agent and reducing gas from the supply path. Gas and other gases are supplied to dry and heat the powdery ore in a fluidized bed format.
The 0 pre-reduced ore that is pre-reduced is discharged from the discharge port 3 along with 7 lux and the like, and is transported by its own weight to the receiving tank 7 through the transport pipe 6. The ore is transported from the receiving tank 7 through a transport branch pipe t to a blower branch pipe 10 or to the siding part of the smelting reduction furnace 1.
After being fed into /, it is blown into the smelting reduction furnace together with high temperature air from the tip of the tuyere.
溶融還元炉コ内には、装入装置７．２より供給される塊
状の炭素系固体還元剤より成る充填層／ｋが形成される
。溶融還元炉コ内に吹込まれた予備還元鉱石は羽口先レ
ースウェイで溶融し、炉下部を滴下する間に還元されて
溶融全編と溶融スラグを生成して排出口１３より適時に
炉外へ排出される。Inside the smelting reduction furnace, a packed bed /k is formed consisting of a lumpy carbon-based solid reducing agent supplied from a charging device 7.2. The pre-reduced ore injected into the smelting reduction furnace is melted in the raceway at the tip of the tuyere, and reduced while dripping down the lower part of the furnace, producing the entire melt and molten slag, which are then discharged from the furnace through the discharge port 13 in a timely manner. be done.
予備還元炉は、溶融還元炉／基についてｌ基又は−基以
上設けられ、前記輸送管６及び受槽７は予備還元炉ｌ基
についてそれぞれ７個設けられる。One or more pre-reduction furnaces are provided for each smelting reduction furnace/group, and seven transport pipes 6 and seven receiving tanks 7 are provided for each pre-reduction furnace.
すなわち予備還元炉ｌには単一の排出口３と単一の輸送
管６を設け、予備還元炉ｌ−溶融還元炉−間の適切な位
置に受槽りを設けて、受槽７と予備゛還元炉ｌを単−輸
送管乙により連絡させる。単一輸送管６は、受槽りまで
大径で断熱性に優れた構造のものとするので、予０１１
７ 還元鉱石の温度降下は顕著に少なくなる。なお受槽
７で、いったん予備還元炉の鉱石などを受容するため、
予備還元炉−溶融還元炉間の静的、動的な干渉は受槽り
で緩和される。That is, the preliminary reduction furnace 1 is provided with a single discharge port 3 and a single transport pipe 6, and a receiving tank is provided at an appropriate position between the preliminary reduction furnace 1 and the smelting reduction furnace. The furnace I is connected by a single transport pipe B. The single transport pipe 6 has a large diameter up to the receiving tank and has a structure with excellent heat insulation.
7. The temperature drop of the reduced ore is significantly reduced. In addition, in the receiving tank 7, in order to receive ore etc. from the preliminary reduction furnace,
Static and dynamic interference between the preliminary reduction furnace and the smelting reduction furnace is alleviated by the receiver tank.
受槽りと溶融還元炉ａに設置された主として上段の複数
の予備還元鉱石吹込み用羽口／／を連絡するように吹込
み羽口数と同数の前記輸送分岐管ｔを設置し、これらを
経て送風支管１０又は羽口ｌ／を通じて溶融還元炉コに
予備還元鉱石を導入す′る。The transportation branch pipes t of the same number as the number of injection tuyeres are installed so as to connect the plurality of pre-reduced ore injection tuyeres located mainly in the upper stage installed in the receiving tank and the smelting reduction furnace a. The pre-reduced ore is introduced into the smelting reduction furnace through the blower pipe 10 or the tuyere l/.
このとき、複数の輸送分岐管ｇ内の粉粒子輸送量の制御
並びに安定輸送のため、搬送ガスを吹込み口？より導入
する。また必要に応じ、受槽７と複数輸送分岐管ｔの接
点近傍にも吹込み口を設けて搬送ガスを導入することも
可能である。At this time, in order to control the amount of powder particles transported in the plural transport branch pipes g and to ensure stable transport, the carrier gas is injected into the inlet. Introduce more. Further, if necessary, it is also possible to provide an inlet near the contact point between the receiving tank 7 and the plurality of transport branch pipes t to introduce the carrier gas.
このような予備還元鉱石の輸送システムをとれば、複数
輸送分岐管の一部に送風空気の吹ぬけが生じても、受槽
内でこれを食い止めることが可能°である。また緊急遮
断装置ｌりを単一輸送管みに設置することも可能である
。With such a pre-reduced ore transportation system, even if the blown air blows through a part of the multiple transportation branch pipes, it can be stopped within the receiving tank. It is also possible to install an emergency cut-off device on only a single transport pipe.
本発明の実施例を以下に示す。Examples of the present invention are shown below.
実施例
１）溶融還元炉内径 ハ、２ｍ
幻 予備還元炉内径 八／ｍ
３）送風羽目 上段グ本（粉体吹込み）′下段ｑ本
計ｇ本
４）送風ｆｉｌ ／１００ Ｎｒｎ３／ ｈｒ６）
単一輸送管 内径 ？！鴎
本数 １本
６）受 魯 内径 、２ま０鴎
個数 ／ケ
ア） 複数輸送分岐管 内径 １３悶
本数 ７本
８）粉体搬送ガス 種類 Ｎ２
上記の試験炉を用いて、粉状クロム鉱石（平均粒径Ｏ，
コ／關）からの７エロクロムの製錬の操業と粉状鉄鉱石
（平均粒径ｏ、３ｔ ａｍ ）がらの銑鉄の（Ｉｔｌ！
針の操業をそれぞれ行ない、予備還元炉から溶融還元炉
への安定な予備還元鉱石輸送を行なうことができた。Example 1) Inner diameter of smelting reduction furnace c, 2m Illusion Inner diameter of preliminary reduction furnace 8/m 3) Air blowing surface Upper tier (powder injection) 'Lower q pieces Total g pieces 4) Air blast fil/100 Nrn3/hr6)
Single transport pipe inner diameter? ! Number of tubes: 1 6) Inner diameter: 2, 0 Number of tubes/care) Multiple transport branch pipes: Inner diameter: 13 Number of tubes: 7 8) Powder carrier gas Type: N2 Using the above test furnace, powdered chromium ore (average Particle size O,
Operation of the smelting of 7erochrome from powdered iron ore (average particle size o, 3 t am) from pig iron (Itl!
The needles were operated individually, and the pre-reduced ore could be transported stably from the pre-reduction furnace to the smelting reduction furnace.
以上のような本発明の効果をまとめると次のよ”うにな
る。The effects of the present invention as described above can be summarized as follows.
１）溶融還元炉の内圧が予備還元炉のそれより高いにも
かかわらず、輸送径路の途中に受槽を設置しているため
、粉体シールの効果が確実で、特に警戒ずべき輸送径路
への送風空気の吹抜は防止の効果がある。1) Even though the internal pressure of the smelting reduction furnace is higher than that of the pre-reduction furnace, the receiving tank is installed in the middle of the transportation route, so the powder sealing effect is reliable, and it is possible to avoid the need for transportation along the transportation route, which should be particularly cautious. Blow-out air has a preventive effect.
２） 予備還元炉から受（Ｗまで、複数の輸送管でなく
、単一の、より太い輸送管にしたため、熱損失がより少
なく、シたがって予備還元鉱石の湿度降下がより、小さ
く、高温のまま、溶融還元炉に吹込める。2) From the pre-reduction furnace to the receiver (W), a single, thicker transport pipe is used instead of multiple transport pipes, so there is less heat loss, and therefore the humidity drop of the pre-reduced ore is smaller, and high temperatures are reduced. It can be blown into the melting reduction furnace as it is.
３）予備還元鉱石の輸送径路の途中に受槽を設け、予備
還元鉱石をいフたん受槽で受けるため、予備、′・３元
炉と溶融還元炉間の干渉が小さくなり、安定な操業に寄
与する。3) A receiving tank is installed in the middle of the transportation route for pre-reduced ore, and since the pre-reduced ore is received in the receiver tank, interference between the pre-reduced ore, the three-way furnace, and the smelting reduction furnace is reduced, contributing to stable operation. do.
例えば、予備還元炉への原料鉱石あるいは必要・、に応
じて供給する７ランクスなどの供給屋などに乱れがあっ
ても、その乱れによって生ずる予備還元炉からの予備還
元・鉱石の輸送の乱れが、いったん受槽で受４Ｊ止めら
れるため、前記原料鉱石供給の乱れが直接に溶融ｊ９元
炉への予備還元鉱石の吹込み操作に波及することがない
。For example, even if there is a disturbance in the supply of raw material ore to the pre-reduction furnace or a supplier such as 7Ranks that supplies it as needed, the disturbance in the transportation of pre-reduction and ore from the pre-reduction furnace will be caused by the disturbance. , Since the receiver 4J is once stopped in the receiver tank, the disturbance in the raw material ore supply does not directly affect the operation of blowing the pre-reduced ore into the melting J9 main furnace.
４） 予備還元炉から溶融還元炉まで複数の輸送管で直
接接続する場合と比較して、本発明による輸送径路では
、細い輸送管部分が、受槽から・溶融還元炉吹込み部分
に限定されているため、細管部での閉そくの機会が少な
くなるとともに１吹込み量の制御性に優れる。4) Compared to the case where the preliminary reduction furnace is directly connected to the smelting reduction furnace by a plurality of transport pipes, in the transport route according to the present invention, the narrow transport pipe section is limited to the part from the receiving tank to the smelting reduction furnace injection part. This reduces the chance of blockage in the thin tube section and provides excellent controllability of the amount of injection.
図は、本発明に係る粉粒状予備還元鉱石の輸送装置を備
えた溶融ｊ舅元設備を概念的に示すその断面図である。
／・・・予（Ｊｒｒｒ還元炉、コ・・・溶融還元炉、Ｊ
・・・鉱石供給装置ｒＷ、４’・・・７ラツクス、固体
還元剤、還元ガス。
空気などの供給径路、Ｓ・・・予備還元鉱石排出口、６
・・・単一輸送管、７・・・受槽、ざ・・・輸送分岐管
、ｔ゛・・・搬送ガス吹込み口、１０・・・送風支管、
ｌ／・・・羽口、／、２・・・固体炭素還元剤供給装置
、／３・・・溶融金属及び溶融スラグの排出口、／４Ｉ
・・・緊急遮断装置、１３・・・炭素系固体還元剤の充
填層。
特許出願人 川崎製鉄株式会社
代理人弁理士 村 ［１１政 治The figure is a sectional view conceptually showing a melting facility equipped with a transportation device for granular pre-reduced ore according to the present invention. /...Pre(Jrrr reduction furnace, Co...Melting reduction furnace, J
...Ore supply device rW, 4'...7 lux, solid reducing agent, reducing gas. Supply path for air, etc., S...Preliminary reduced ore discharge port, 6
...Single transport pipe, 7...Receiving tank, Z...Transport branch pipe, t゛...Carrier gas inlet, 10...Blower branch pipe,
l/... tuyere, /, 2... solid carbon reducing agent supply device, /3... molten metal and molten slag discharge port, /4I
...Emergency shutoff device, 13...Filled bed of carbon-based solid reducing agent. Patent applicant Kawasaki Steel Co., Ltd. Representative patent attorney Mura [11 Politics]
Claims (1)
元炉と予備還元鉱石を高温空気と共に炉内に吹込むため
の複数の羽目を備えた溶融還元炉とから成る溶融還元設
備において、該予備還元炉に単一の予備還元鉱石排出口
を設け、該予備還元炉と該溶融還元炉との間に予備還元
鉱石の受槽を設け、該予備還元炉の前記排出口と該受槽
とを単一の輸送管で連絡し、更に該受槽と前記溶融還元
炉に設けた前記複数の羽目又は送風支管とを羽口数と同
数の輸送分岐管で連絡し、かつ該輸送分岐管の途中に搬
送ガスの吹込み口を設けたことを特徴とする、溶融還元
設備における粉粒状予備還元鉱石の輸送装置。1. In a smelting reduction equipment for producing molten metal from granular ore, which comprises a pre-reduction furnace and a smelting reduction furnace equipped with a plurality of walls for blowing the pre-reduced ore together with high-temperature air into the furnace, the pre-reduction The furnace is provided with a single pre-reduced ore discharge port, a pre-reduced ore receiving tank is provided between the pre-reduction furnace and the smelting reduction furnace, and the discharge port of the pre-reduced furnace and the receiving tank are connected to each other by a single pre-reduced ore discharge port. The receiving tank and the plurality of tuyere or blowing branch pipes provided in the smelting reduction furnace are connected by a transport pipe, and the receiving tank and the plurality of tuyeres or blowing branch pipes are connected by transport branch pipes having the same number as the number of tuyeres, and a carrier gas is blown in the middle of the transport branch pipe. A device for transporting granular pre-reduced ore in a smelting reduction facility, characterized by having an inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9309482A JPS58210110A (en) | 1982-06-02 | 1982-06-02 | Device for transporting preliminarily reduced powder and granular ore in melt reduction installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9309482A JPS58210110A (en) | 1982-06-02 | 1982-06-02 | Device for transporting preliminarily reduced powder and granular ore in melt reduction installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58210110A true JPS58210110A (en) | 1983-12-07 |
| JPS6360802B2 JPS6360802B2 (en) | 1988-11-25 |
Family
ID=14072928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9309482A Granted JPS58210110A (en) | 1982-06-02 | 1982-06-02 | Device for transporting preliminarily reduced powder and granular ore in melt reduction installation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58210110A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998015663A1 (en) * | 1996-10-08 | 1998-04-16 | Voest-Alpine Industrieanlagenbau Gmbh | Device for dosed introduction of fine particle material into a reactor vessel |
-
1982
- 1982-06-02 JP JP9309482A patent/JPS58210110A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998015663A1 (en) * | 1996-10-08 | 1998-04-16 | Voest-Alpine Industrieanlagenbau Gmbh | Device for dosed introduction of fine particle material into a reactor vessel |
| US6210627B1 (en) | 1996-10-08 | 2001-04-03 | Voest-Alpine Industrieanlagenbau Gmbh | Arrangement for the dosed introduction of fine-particulate material into a reactor vessel |
| CN1070925C (en) * | 1996-10-08 | 2001-09-12 | 沃斯特－阿尔派因工业设备制造有限公司 | Device for dosed introduction of fine particle material into reactor vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6360802B2 (en) | 1988-11-25 |
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