JPH0328307A - Fluidized bed type pre-reduction furnace for iron or nonferrous ore - Google Patents
Fluidized bed type pre-reduction furnace for iron or nonferrous oreInfo
- Publication number
- JPH0328307A JPH0328307A JP16261789A JP16261789A JPH0328307A JP H0328307 A JPH0328307 A JP H0328307A JP 16261789 A JP16261789 A JP 16261789A JP 16261789 A JP16261789 A JP 16261789A JP H0328307 A JPH0328307 A JP H0328307A
- Authority
- JP
- Japan
- Prior art keywords
- ore
- reduction
- furnace
- fluidized bed
- gas
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 6
- 239000006185 dispersion Substances 0.000 claims description 9
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野１
本発明は、鉄あるいは非鉄鉱石を溶融還元する際に用い
られる流動層式予備還元炉に関する．〔従来の技術Ｊ
鉄あるいは非鉄鉱石の資源は、近年、低品位化の傾向に
あり，品位を向上するために低品位鉱を選鉱して、粉粒
鉱として使用されるようになった。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a fluidized bed pre-reduction furnace used for melting and reducing iron or non-ferrous ore. [Prior Art J] In recent years, iron or non-ferrous ore resources have tended to become lower in grade, and in order to improve the grade, low-grade ore has been beneficent and used as granule ore.
これ等の扮粒鉱から金属あるいは合金を製造する方法と
しで、扮粒鉱を予備還元した後、溶融還元して金属ある
いは合金を製造する方法がある。As a method for producing metals or alloys from these ores, there is a method in which the ores are pre-reduced and then melted and reduced to produce metals or alloys.
扮粒鉱を予備還元する装置としては回転炉も使用し得る
が，流動層炉は回転炉に比して、■温度制御が正確に行
われるので、極部過熟による扮粒鉱の成塊がない。A rotary furnace can also be used as a device for pre-reducing grain ore, but compared to a rotary furnace, a fluidized bed furnace is more accurate in temperature control, so it is easier to agglomerate grain ore due to extreme overripeness. There is no.
■設置面積に対する処理能力が大きい６等の利点があり
、今後、益々使用されるものと思われる．
前記の粉粒鉱は、一般に、粒径は最大が３ｍｍで０．１
ｍｍ以下の粉末も含有しており、流動層内で流速２〜１
０ｍ／ｓｅｃの還元ガスで流動化され、例えば予備還元
鉱石をｌ日にｌ００ｔ生産するとすれば，炉の大きさは
内径２〜６ｍ、高さｌＯ〜３０ｍになると思われ、予備
還元反応が均一にかつ効率よく行われるためには、供給
された鉱石粒子および還元ガスが十分に分散して、相互
によく混合して反応する必要がある。■It has the advantage of large processing capacity relative to the installation area, and is expected to be used more and more in the future. The above-mentioned powder ore generally has a maximum particle size of 3 mm and a diameter of 0.1 mm.
It also contains powder of less than 1 mm in size, and the flow rate in the fluidized bed is 2 to 1.
For example, if 100 tons of pre-reduced ore is produced per day by fluidizing with reducing gas at 0 m/sec, the size of the furnace would be 2 to 6 m in inner diameter and 10 to 30 m in height, ensuring that the pre-reduction reaction is uniform. In order to carry out the reaction efficiently and efficiently, it is necessary that the supplied ore particles and the reducing gas are sufficiently dispersed and mixed well with each other for the reaction to occur.
流動層式予備還元炉としては、例えば特開昭５８−２
１ ７６ １ ５号公報に開示されたものがあるが、こ
こに開示されたものは炉の内径が１ｍ程度の小型のもの
で、還元ガス供給口も実質的に１個で、この型式によっ
ては、上記の大きさの流動層式予備還元炉においては鉱
石粒子および還元ガスの十分な分散および混合を行うこ
とは困難で、多量の予備還元鉱石を生産し得る大型の流
動層式予備還元炉を開発するに際し、鉱石粒子および還
元ガスの十分な分散および混合を行うことが要望されて
いた。As a fluidized bed pre-reduction furnace, for example, JP-A-58-2
There is a furnace disclosed in 17615, but the furnace disclosed here is a small one with an inner diameter of about 1 m, and has essentially one reducing gas supply port, and depending on this model, However, it is difficult to sufficiently disperse and mix ore particles and reducing gas in a fluidized bed pre-reduction furnace of the above size, so a large fluidized bed pre-reduction furnace that can produce a large amount of pre-reduced ore is needed. During development, there was a demand for sufficient dispersion and mixing of ore particles and reducing gas.
［発明が解決しようとする課題１
本発明は、供給された粉粒鉱石および還元ガスを十分に
分散および混合し得る流動層式予備還元炉を提供し、前
記要望を解決しようとするちのである．
〔課題を解決するための手段１
本発明は前記課題を解決するために、炉内に還元ガスを
供給する還元ガス供給口が炉底に平面的均一に２個以上
設けられ、かつ該還元ガス供給口が還元ガス出口部にガ
ス分散装置を有することを特徴とする鉄あるいは非鉄鉱
石の流動層式予備還元炉を提供するものである。[Problem to be Solved by the Invention 1] The present invention seeks to solve the above-mentioned needs by providing a fluidized bed pre-reduction furnace capable of sufficiently dispersing and mixing supplied granular ore and reducing gas. ．． [Means for Solving the Problems 1] In order to solve the above-mentioned problems, the present invention provides two or more reducing gas supply ports that supply reducing gas into the furnace, which are provided uniformly in a plane on the bottom of the furnace, and in which the reducing gas The present invention provides a fluidized bed pre-reduction furnace for iron or non-ferrous ore, characterized in that the supply port has a gas dispersion device at the reducing gas outlet.
本発明を図面を用いて説明する．
第１図は本発明の一実施例における下部の構造を示す縦
断面説明図である。The present invention will be explained using drawings. FIG. 1 is an explanatory longitudinal cross-sectional view showing the structure of the lower part in one embodiment of the present invention.
■は予備還元炉、２．２は予備還元炉ｌの側壁の下部に
同一の高さの位置に対称に２個設けられた鉱石供給口で
、これを通して鉄あるいは非鉄扮粒鉱石が炉内に供給さ
れる。■ is a preliminary reduction furnace, and 2.2 is two ore supply ports installed symmetrically at the same height at the bottom of the side wall of the preliminary reduction furnace l, through which ferrous or non-ferrous granular ore is fed into the furnace. Supplied.
３．３は還元ガス供給口で、予備還元炉ｌの炉底に平面
的均一に２個設けられ、その上端の還元ガス出口部にガ
ス分散装置４．４としてそれぞれ棒鋼を列設しており、
還元ガス供給管５．５により送られる還元ガスを炉ｌ内
に充分分散して供給する。3.3 is a reducing gas supply port, and two of them are provided uniformly on a plane at the bottom of the pre-reducing furnace 1, and a steel bar is arranged in a row as a gas dispersion device 4.4 at the reducing gas outlet section at the upper end of each port. ,
The reducing gas sent through the reducing gas supply pipe 5.5 is supplied into the furnace 1 in a well-distributed manner.
６は流動層よりの落鉱の抜出口である。6 is an outlet for extracting fallen ore from the fluidized bed.
本発明においては、２個以上の還元ガス供給口が炉底に
平面的均一に設けられ、かつ還元ガス供給口が還元ガス
出口部にガス分散装置を有するならば、瓜元ガス供給口
の設置数およびガス分散装置の構造は上記実施例に限定
されるものではなく、還元ガス供給口の設置数が多い程
、供給された鉱石およびガスの分散・混合が良好となる
ので、その設置数および設置位置は炉の大きさ等を勘案
して適宜決定され，ガス分散装置としてはパンチプレ−
１一等も使用し得る。In the present invention, if two or more reducing gas supply ports are provided uniformly on the bottom of the furnace, and the reducing gas supply port has a gas dispersion device at the reducing gas outlet, the installation of the gas supply port The number of reducing gas supply ports and the structure of the gas dispersion device are not limited to those in the above embodiments. The installation location is determined appropriately taking into consideration the size of the furnace, etc., and a punch plate is used as the gas dispersion device.
11th grade may also be used.
本発明においては、還元ガスが炉底に平面的均一に設け
られた複数の供給口より炉内に供給されるので、鉱石と
還元ガスの分散・混合を、大型の流動層式予備還元炉に
おいても、向上させることができる。In the present invention, the reducing gas is supplied into the furnace through a plurality of supply ports uniformly provided on the bottom of the furnace, so the ore and reducing gas are dispersed and mixed in a large fluidized bed pre-reducing furnace. can also be improved.
［実施例］
第１図に示した型式の本発明の流動層式予備還元炉を、
第２図に系統をブロック図で示した予備還元装置に組込
んだ．
予備還元炉は、内径０． ７ ｍ ．高さ７．３ｍで、
還元ガスとして（ Ｃ Ｏ ＋ Ｈ ２ ＋Ｎ ２ ）
の組成からなるガスを用い、粉鉱石を６ ０ ０ ｋ
ｇ／ｈの割合で予備還元した。[Example] The fluidized bed pre-reduction furnace of the present invention of the type shown in FIG.
The system was incorporated into the preliminary reduction device shown in the block diagram in Figure 2. The preliminary reduction furnace has an inner diameter of 0. 7 m. With a height of 7.3m,
As a reducing gas (C O + H 2 + N 2 )
Using a gas with a composition of 600 k
Prereduction was carried out at a rate of g/h.
鉱石は．鉱石供一給管８、鉱石供給量調整装置７．７を
通して予備還元炉ｌに分散して供給され，還元ガスは、
還元ガス供給管５．５、還元ガス供給量調節装置９．９
を通って予備還元炉ｌに分散供給され、炉ｌ内を上界し
、供給された鉱石を流動化すると共に予備還元する。The ore. The reducing gas is distributed and supplied to the preliminary reduction furnace l through the ore supply pipe 8 and the ore supply amount adjustment device 7.7.
Reducing gas supply pipe 5.5, reducing gas supply amount adjustment device 9.9
The ore is dispersedly supplied to the pre-reduction furnace 1 through the ore, and flows upwardly within the furnace 1 to fluidize and pre-reduce the supplied ore.
炉ｌの排ガスは予備還元された鉱石を伴って、サイクロ
ンｔｏ．ｉｏを順次通過し，予備還元鉱石を分離したの
ち系外に排出され、サイクロン１０．１０で分離された
予備還元鉱石は製品抜出管１１により抜出される。The exhaust gas from furnace I, together with the pre-reduced ore, is passed through cyclone to. io, and after separating the pre-reduced ore, it is discharged to the outside of the system, and the pre-reduced ore separated by the cyclones 10 and 10 is extracted through the product extraction pipe 11.
流動層からの落鉱を落鉱抜出口６より抜出した。The fallen ore from the fluidized bed was extracted from the fallen ore extraction port 6.
上記の操作により，製品の歩留りは９０％、予備還元率
は５５％となった。Through the above operations, the product yield was 90% and the preliminary reduction rate was 55%.
なお、比較例として、還元ガス供給口を１個とした以外
は実施例と同様にして操業した場合には，製品の歩留り
は同様であったが、予備還元率は４０％となり，本発明
の効果は明らかであった，
〔発明の効果］
本発明により、流動層中の鉱石および還元ガスの分散・
混合が改善され、反応が均一化されると共に反応効率が
良くなった。As a comparative example, when the operation was carried out in the same manner as in the example except that the number of reducing gas supply ports was changed to one, the product yield was the same, but the preliminary reduction rate was 40%, which was higher than that of the present invention. The effects were obvious. [Effects of the invention] The present invention has improved the dispersion and reduction of ore and reducing gas in a fluidized bed.
The mixing was improved, the reaction was more homogeneous, and the reaction efficiency was higher.
第１図は本発明の実施例の下部構造を示す縦断面説明図
，第２図は第ｌ図に示す本発明の実施例を組込んだ還元
装置の系統を示すブロック図である．
１−・・予備還元炉 ２・・一鉱石供給口３・・
・還元ガス供給口 ４・・・ガス分散装置５・・・還
元ガス供給管 ６−・落鉱抜出口７−・・鉱石供給量
調整装置
８・・・鉱石供給管
９・・・還元ガス供給量調整装置
１０・・・サイクロン １１・・・製品抜出管出
願 人FIG. 1 is a vertical cross-sectional explanatory view showing the lower structure of an embodiment of the present invention, and FIG. 2 is a block diagram showing a system of a reduction device incorporating the embodiment of the present invention shown in FIG. 1-... Preliminary reduction furnace 2... One ore supply port 3...
- Reducing gas supply port 4... Gas dispersion device 5... Reducing gas supply pipe 6-- Ore extraction outlet 7-... Ore supply amount adjustment device 8... Ore supply pipe 9... Reducing gas supply Amount adjusting device 10...Cyclone 11...Product extraction pipe outlet
wish person
Claims (1)
平面的均一に２個以上設けられ、かつ該還元ガス供給口
が還元ガス出口部にガス分散装置を有することを特徴と
する鉄あるいは非鉄鉱石の流動層式予備還元炉。1. An iron plate characterized in that two or more reducing gas supply ports for supplying reducing gas into the furnace are provided uniformly in a plane on the bottom of the furnace, and the reducing gas supply ports have a gas dispersion device at the reducing gas outlet. Or a fluidized bed pre-reduction furnace for non-ferrous ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16261789A JPH0328307A (en) | 1989-06-27 | 1989-06-27 | Fluidized bed type pre-reduction furnace for iron or nonferrous ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16261789A JPH0328307A (en) | 1989-06-27 | 1989-06-27 | Fluidized bed type pre-reduction furnace for iron or nonferrous ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0328307A true JPH0328307A (en) | 1991-02-06 |
Family
ID=15758011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16261789A Pending JPH0328307A (en) | 1989-06-27 | 1989-06-27 | Fluidized bed type pre-reduction furnace for iron or nonferrous ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0328307A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230913A (en) * | 1986-03-31 | 1987-10-09 | Kawasaki Steel Corp | Method for reducing powdery ore in fluidized bed |
-
1989
- 1989-06-27 JP JP16261789A patent/JPH0328307A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230913A (en) * | 1986-03-31 | 1987-10-09 | Kawasaki Steel Corp | Method for reducing powdery ore in fluidized bed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6137929A (en) | Method and apparatus for treatment of sulfide concentrate and sulfide ore | |
| RU2158769C2 (en) | Three-stage gear for reduction of fine-grain iron ore in fluidized layer | |
| WO1992012264A1 (en) | Fluidized bed preliminary reducing furnace for raw material comprising oxide | |
| JPH0328307A (en) | Fluidized bed type pre-reduction furnace for iron or nonferrous ore | |
| JPH0331412A (en) | Fluidized bed type prereduction furnace for iron or non-ferrous ore | |
| JPH0328305A (en) | Fluidized bed type pre-reduction furnace for iron or nonferrous ore | |
| AU717927B2 (en) | Two step twin-single fluidized bed type pre-reduction apparatus for pre-reducing fine iron ore, and method therefor | |
| JPH0328306A (en) | Fluidized bed type pre-reduction furnace for iron or nonferrous ore | |
| JPH01184211A (en) | Fluidized bed reduction device for ore | |
| JPH01129915A (en) | Prereduction furnace for smelting reduction | |
| JP2579785B2 (en) | Pre-reduction device for smelting reduction | |
| JPH03138309A (en) | Apparatus for reducing ore | |
| JPH06145749A (en) | Method for reducing ore by circulating fluidized bed | |
| KR100276343B1 (en) | High-temperature reduced iron cooler and fluidized bed furnace reduction device of iron ore with this cooler | |
| JPH03100111A (en) | Operating method of fluidized reduction furnace for powder ore | |
| JP2765734B2 (en) | Operation method of iron bath reactor | |
| JPS6338507A (en) | Forehearth for attaching to smelting reduction furnace | |
| EP1060273A1 (en) | Complex fluidized bed type fine iron ore reducing apparatus, and method therefor | |
| JP2659589B2 (en) | Circulating fluidized bed reduction device | |
| JP3045408B2 (en) | Powder circulating fluidized bed reactor | |
| JPH05331516A (en) | Particle circulating device for circulating type fluidized bed pre-reduction furnace | |
| JPH0613251Y2 (en) | Iron ore fluidized bed reduction device | |
| JPH01111808A (en) | Iron ore fluidized bed reduction apparatus | |
| JPH01114691A (en) | Iron ore fluidized-bed reducing device | |
| JPH01195215A (en) | Fluidized-bed reducing device for iron ore |