JPS63111111A - Direct reduction apparatus for iron ore - Google Patents
Direct reduction apparatus for iron oreInfo
- Publication number
- JPS63111111A JPS63111111A JP61256997A JP25699786A JPS63111111A JP S63111111 A JPS63111111 A JP S63111111A JP 61256997 A JP61256997 A JP 61256997A JP 25699786 A JP25699786 A JP 25699786A JP S63111111 A JPS63111111 A JP S63111111A
- Authority
- JP
- Japan
- Prior art keywords
- soot
- gas
- iron
- furnace
- iron ore
- 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 86
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000004071 soot Substances 0.000 claims abstract description 30
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 11
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract description 5
- 239000003345 natural gas Substances 0.000 abstract description 5
- 239000004484 Briquette Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000006114 decarboxylation reaction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は鉄鉱石の［α接還元装置のうち、主としてシャ
フト炉式還元装置における還元鉄中の煤（微粒カーボン
）除去装置に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an apparatus for removing soot (fine carbon particles) from reduced iron in a shaft furnace type reduction apparatus, among α-addressing apparatuses for iron ore. .
本発明の対象とするシャフト炉式直接還元装置の概要を
第２図に示す略示的全体構成説明図によって説明する。An overview of the shaft furnace type direct reduction apparatus to which the present invention is applied will be explained with reference to a schematic overall configuration explanatory diagram shown in FIG.
本装置は、粒状又ははレット状の鉄鉱石１をシャフト炉
（以下、炉と略称）２へ供給する原料コンベヤ３と原料
装入装置４と、還元鉄１ａを炉２外へ排出する排出装置
５と、排出された還元鉄１ａを、ブリケラティングプラ
ントあるいは貯蔵ヤード（いずれも図示せず）へ搬送す
るコンテナ６と、例えば、水素（Ｈ２）等の還元ガス発
生炉７と、ガス圧縮機９、脱炭酸設備１０．加熱炉８等
からなるリサイクル還元ガス系統１１の主要部材で植成
されている。This device consists of a raw material conveyor 3 that supplies iron ore 1 in the form of granules or pellets to a shaft furnace (hereinafter referred to as the furnace) 2, a raw material charging device 4, and a discharge device that discharges reduced iron 1a to the outside of the furnace 2. 5, a container 6 for transporting the discharged reduced iron 1a to a briquetting plant or storage yard (none of which is shown), a reducing gas generating furnace 7 such as hydrogen (H2), and a gas compressor. 9. Decarboxylation equipment 10. It is planted with the main components of the recycled reducing gas system 11, which includes the heating furnace 8 and the like.
原料装入装置４は炉２頂に取付けた上部ホッパ１２ａと
下部ホラ、（！１２１）と上、下２個のシール弁１３ａ
、１３ｂからなり、上、下ホッパ１２ａ。The raw material charging device 4 includes an upper hopper 12a and a lower hopper (!121) attached to the top of the furnace 2, and two upper and lower seal valves 13a.
, 13b, and upper and lower hoppers 12a.
１２ｂ間はシール弁１３ａにより、下部ホッパ１２１）
と炉２間はシール弁１３１）によシ、それぞれ、ガス気
密に仕切られており、コンベア３から、所定のタイムス
ケジュールに従って供給される原料１を大気に対し気密
を保持しながら炉２内へ供給可能でおる。炉２内には、
後述する切出装置１５を介して、常に所定のレイルに鉄
鉱石１を滞留せしめると共に、炉体下部の外周に設けた
多数の羽口１４から高温の還元ガス（Ｈｚ等）を炉内へ
供給し、その排ガスを炉頂の管路１１ａから排出せしめ
ることによシ、鉄鉱石１を還元鉄１ａ。Between 12b and 12b, the seal valve 13a closes the lower hopper 121)
and the furnace 2 are gas-tightly partitioned by a seal valve 131), and the raw material 1 supplied from the conveyor 3 according to a predetermined time schedule is introduced into the furnace 2 while maintaining airtightness from the atmosphere. We can supply it. Inside the furnace 2,
Iron ore 1 is always retained on a predetermined rail through a cutting device 15, which will be described later, and high-temperature reducing gas (Hz, etc.) is supplied into the furnace from a large number of tuyeres 14 provided on the outer periphery of the lower part of the furnace body. By discharging the exhaust gas from the pipe line 11a at the top of the furnace, the iron ore 1 is converted to reduced iron 1a.
すなわち、海綿鉄（Ｓｐｏｎｇｅ 工ｒｏｎ）に還元可
能に構成されている。前記、デ頂の排ガスは管路１１ａ
からガス圧縮機９で吸引、加圧されて脱炭酸設備１０に
送られ、ここで所要純度に、さらに加熱炉８で高温の還
元ガスに再生された後管路１１１３、調整弁１１Ｃ及び
管路ｌｉｄから環状管ｌｉｅを経て羽口１４へ循環供給
される。この場合、脱炭酸設備１０等における還元ガス
の消耗分は還元ガス発生炉７の新鮮ガスで補給する。一
方、還元鉄排出装置５は炉２の底部に取付けた、例えば
、テーブルフィーダ等の切出装置１５と、上部及び下部
排出ホッパ１６ａ、１６１）と、上部、及び下部の２■
シール弁１７ａ、１７ｂで構成されておシ、上部排出ホ
ッパ１６ａは炉２と一体構造をなし、上部２重シール弁
１７ａを介して、該排出ホツノ々１６ａ内、すなわち、
炉２内が下部排出ホツノに対しガス気密に仕切られてい
る。下部排出ホッパ１６１）は下部シール弁１７ｂで大
気に対しガス気密に仕切られている。また、上、下ホッ
パ１６ａ。That is, it is configured to be reducible to sponge iron. The exhaust gas at the top of the pipe is pipe 11a.
The gas is sucked and pressurized by the gas compressor 9 and sent to the decarboxylation equipment 10, where it is made to the required purity and further regenerated into high-temperature reducing gas in the heating furnace 8. After that, the pipe 1113, the regulating valve 11C, and the pipe It is circulated and supplied from the lid to the tuyere 14 via the annular pipe lie. In this case, the amount of reducing gas consumed in the decarboxylation equipment 10 and the like is replenished with fresh gas from the reducing gas generating furnace 7. On the other hand, the reduced iron discharge device 5 includes a cutting device 15, such as a table feeder, which is attached to the bottom of the furnace 2, upper and lower discharge hoppers 16a, 161), and upper and lower two parts.
The upper discharge hopper 16a is composed of seal valves 17a and 17b, and has an integral structure with the furnace 2, and the upper discharge hopper 16a has a structure in which the inside of the discharge hopper 16a, that is,
The inside of the furnace 2 is gas-tightly partitioned from the lower part of the furnace. The lower discharge hopper 161) is gas-tightly partitioned off from the atmosphere by a lower seal valve 17b. Also, upper and lower hoppers 16a.
１６１）の底部は、それぞれ還元鉄１ｂの重力による排
出を円滑にするため、適当な傾斜角を持つ逆円すい筒又
は角すい筒体をなしている。ここで、前記炉２内及び上
部排出ホラ”１６ａ円は、通常、大気圧以上の所定の圧
力に保持される。煤発生炉２０は天然ガス（ＮＧ）を圧
縮空気、または戚素冨化空気（Ａ）によシネ完全燃焼さ
せ、媒含有還元ガスを発生する。なお、図中、１８は排
出弁、１９は媒含有還元ガス供給管、３０は予熱炉を示
す。The bottom of each of the tubes 161) is formed into an inverted conical cylinder or a rectangular cylinder with an appropriate inclination angle in order to smoothly discharge the reduced iron 1b by gravity. Here, the inside of the furnace 2 and the upper discharge hole 16a are normally maintained at a predetermined pressure higher than atmospheric pressure.The soot generating furnace 20 converts natural gas (NG) into compressed air or enriched air ) is completely combusted to generate a medium-containing reducing gas. In the figure, 18 is a discharge valve, 19 is a medium-containing reducing gas supply pipe, and 30 is a preheating furnace.
以上の構成であるから、鉄鉱石１は炉２内を降下する間
に、羽口１４から吹き込まれる還元ガスと接融して高純
度の海綿鉄１ａに還元され、切出装置１５を介して順次
、上部排出ホラ／Ｊ１６＆へ排出される。前記ホッパ１
６ａ内の海綿鉄１ａは、一定量に達すると、上部２重シ
ール弁１７ａを開閉して重力により下部排出ホッパ１６
１）へ排出される。この場合、排圧弁１８は閉とする。With the above configuration, while the iron ore 1 descends in the furnace 2, it is fused with the reducing gas blown from the tuyere 14 and reduced to high-purity sponge iron 1a, and then passed through the cutting device 15. It is sequentially discharged to the upper discharge hole/J16&. Said hopper 1
When the sponge iron 1a in 6a reaches a certain amount, the upper double seal valve 17a is opened and closed, and the lower discharge hopper 16 is discharged by gravity.
1). In this case, the exhaust pressure valve 18 is closed.
つぎに、下部ホツノ１１６ｂ内の海綿鉄１ａをコンテナ
６へ排出する場合は、上部２Ｎシール弁１７ａが閉状態
で排圧弁１８を大気へ開放しホッパ１６１）内の圧力（
炉内圧に等しい）を大気圧とした後、下部２重シール弁
１７１）を開くことによシ重力で容易に排出できる。こ
こで、コンテナ６内の海綿鉄１ａは粒状で、かつ高温（
例えば約８ｕＯ℃）であるため、次の処理工程である製
鋼工場、あるいは貯蔵ヤード等への搬送を容易にすると
共に、搬送、ならびに貯蔵期間中に大気によって生じる
表面の再酸化を防止するため、通常、炉２に隣接したブ
リケラティングプラントへ搬送し、ここで、所要の形状
のブリケットに圧縮成形した後、冷却し、貯蔵ヤード、
あるいは、型鋼工場へ移送される。Next, when discharging the sponge iron 1a in the lower hopper 116b to the container 6, the upper 2N seal valve 17a is closed and the exhaust pressure valve 18 is opened to the atmosphere, so that the pressure inside the hopper 161) (
After bringing the furnace pressure (equal to the furnace internal pressure) to atmospheric pressure, it can be easily discharged by gravity by opening the lower double seal valve 171). Here, the sponge iron 1a in the container 6 is granular and has a high temperature (
For example, about 8 uO℃), it facilitates transportation to the next processing step, such as a steel factory or storage yard, and also prevents surface re-oxidation caused by the atmosphere during transportation and storage. Usually, the briquettes are transported to a briquetting plant adjacent to the furnace 2, where they are compressed into briquettes of the desired shape, cooled, and stored in a storage yard.
Alternatively, it is transferred to a mold steel factory.
前述のような従来の直接還元装置においては、処理する
鉄鉱石の銘柄に適応した還元ガスの性状ならびに、炉内
ガス温度等の極めて高精度な操業条件の管理を行う必要
があシ、これら諸条件のバラツキによシ、しばしば、炉
２内で鉄鉱石同志が結合し、いわゆる、クラスタ（Ｃ１
ｕｓｔｅｒ）が発生し易く、このクラスタは順次大きさ
が拡大し、その結果炉内に鉱石が閉塞する、いわゆる棚
吊シ現象が発生し、遂には操業不能という重大事故につ
ながるという問題点がある。In the conventional direct reduction equipment described above, it is necessary to control extremely precise operating conditions such as the properties of the reducing gas suitable for the brand of iron ore being processed and the gas temperature in the furnace. Due to variations in conditions, iron ores often combine with each other in the furnace 2, forming so-called clusters (C1
There is a problem in that this cluster tends to occur, and the size of this cluster gradually increases, resulting in ore clogging in the furnace, a so-called hanging phenomenon, which can eventually lead to a serious accident such as the inability to operate. .
そのため、前述の従来装置では、煤（Ｓｏｏｔ）を管路
１９から環状管ｌｉｅへ供給し、還元ガス（Ｈ２等）と
共に羽口１４から炉２内へ吹き込み、炉内の鉄鉱石１及
び還元鉄１ａの表面に煤を付着させることによシフラス
タの発生を防止している。Therefore, in the conventional apparatus described above, soot is supplied from the pipe line 19 to the annular pipe lie, and is blown into the furnace 2 through the tuyere 14 together with the reducing gas (H2, etc.), and the iron ore 1 and reduced iron in the furnace are By attaching soot to the surface of 1a, the occurrence of siffusion is prevented.
ところが、このように炉２内に煤を吹込むと、コンテナ
６へ排出される海綿鉄１ａの表面には、前記煤が付着し
ており、このまま、例えば、ロール形のブリケットマシ
ンで圧縮成形を行うと、付着煤のため海線法１ａ同志の
圧着が阻害され所定の形状のブリケットに成形できない
という大きな問題が発生する。−また海線法は表面に煤
を付着したま＼ブリケットマシンに送られるため、煤（
スーツ）はリサイクルすることなく、従って煤発生炉で
生産する必要がある。このため原料たる天然ガスが多量
に必要となる。However, when soot is blown into the furnace 2 in this way, the soot adheres to the surface of the sponge iron 1a discharged into the container 6, and the soot is left as it is to be compression molded using, for example, a roll-type briquette machine. If this is done, a serious problem arises in that the adhesion of soot prevents the sea line method 1a from being crimped together, making it impossible to form the briquettes into a predetermined shape. - Also, in the sea line method, the soot is sent to the briquetting machine with soot still attached to the surface, so the soot (
suits) cannot be recycled and therefore have to be produced in soot-producing furnaces. Therefore, a large amount of natural gas is required as a raw material.
本発明は前述のような問題を解決するために、（イ）下
部還元鉄排出ホッパの底部の全周に、該排出ホッパ内へ
吹き込み可能なガスノズルを設ける。In order to solve the above-mentioned problems, the present invention (a) provides a gas nozzle that can blow into the lower reduced iron discharge hopper around the entire bottom of the lower reduced iron discharge hopper.
（ロ）前記ガスノズルへ不活性ガス（Ｎ２）を供給する
ブロワ及び管路を設ける。(b) A blower and a conduit are provided to supply inert gas (N2) to the gas nozzle.
（ハ）前記ホッパ１内に吹込んだ不活性ガス（Ｎ２）を
該下部排出ホッパ上部から、前記ブロワの吸入側へ導入
する管路（不活性ガスリサイクル管路）を設け、該管路
に除塵器を介在させる。(c) A pipe (inert gas recycling pipe) is provided for introducing the inert gas (N2) blown into the hopper 1 from the upper part of the lower discharge hopper to the suction side of the blower, and the pipe is connected to the pipe. Interpose a dust remover.
下部排出ホッパ底部で還元鉄中に吹込まれた不活性ガス
が煤を分離除去する。下部排出ホッパ上部の排ガス管路
から抜き出された煤を含有する不活性ガスは、除塵器で
煤を除去された後で再び下部排出ホッパ底部に吹込まれ
不活性ガスリサイクルを構成する。Inert gas blown into the reduced iron at the bottom of the lower discharge hopper separates and removes soot. The soot-containing inert gas extracted from the exhaust gas pipe in the upper part of the lower discharge hopper is blown into the bottom of the lower discharge hopper again after the soot is removed by a dust remover to constitute inert gas recycling.
以下、図面によって具体的に説明する。第１図は本発明
鉄鉱石直接還元装置の略示的全体構成説明図であるが、
前述した従来装置（第２図）と同一部材、あるいは、類
似部材には同一符号を付し、重複する構成説明は省略す
る。A detailed explanation will be given below with reference to the drawings. FIG. 1 is a schematic overall configuration explanatory diagram of the iron ore direct reduction apparatus of the present invention.
The same or similar members as those of the conventional device described above (FIG. 2) are designated by the same reference numerals, and redundant explanation of the structure will be omitted.
本発明装置では、第１図に図示の如く、下部排出ホッパ
Ｊ１６ｂの底部の内側にその全周にわたってルーバ状の
ガス吹込ノズル２１ａを取付ける。In the apparatus of the present invention, as shown in FIG. 1, a louver-shaped gas blowing nozzle 21a is attached to the inside of the bottom of the lower discharge hopper J16b over its entire circumference.
ノズル２１ａの下端縁は全周にわたって開口し、上端縁
はホッパ１６ｂ内壁に対しガス気密状に取付ると共に、
該上端縁をその全周にわたってほぼ等ピッチに複数の接
続管２６を介して、ホッパ１６１）外周に設けた環状管
２７に連通せしめる。The lower edge of the nozzle 21a is open over the entire circumference, and the upper edge is attached to the inner wall of the hopper 16b in a gas-tight manner.
The upper end edge is communicated with an annular pipe 27 provided on the outer periphery of the hopper 161 via a plurality of connecting pipes 26 at approximately equal pitches over its entire circumference.
さらに、環状管２７は管路２３ｈを介してブロワ２２出
口と連通せしめる。ホッパＪ１６ｋｌの頂部の適宜位置
に排ガス管路２３Ｃを取付け、前記ガスノズル２１＆か
ら吹込まれた不活性ガス（Ｎ２）と煤の混合ガスを弁２
３ｄ１管路２３ｅ、ガス冷却器２４、管路２３ｆ１除じ
ん器２５及び管路２３ｇを経て前記ブロワ２２で吸引し
、再度吹込ノズル２１ａに供給するリサイクルガス管路
２３を構成する。なお、要すれば除じん器２５出口側に
ガス加熱器（図示せず）を設け、還元鉄の冷却を防止す
る。々お、前記ガス吹込ノズル２１ａの吹出口の位置及
びその高さ寸法は、ホッパ１６１）内の海線法１ａのコ
ンテナ６への排出を阻害しないようにし、できるだけ排
出口に近づけることが望ましい。Further, the annular pipe 27 is communicated with the outlet of the blower 22 via a pipe line 23h. An exhaust gas pipe 23C is installed at an appropriate position on the top of the hopper J16kl, and a mixed gas of inert gas (N2) and soot blown from the gas nozzle 21& is supplied to the valve 2.
3d1 pipe 23e, gas cooler 24, pipe 23f1 dust remover 25 and pipe 23g, the recycled gas pipe 23 is sucked by the blower 22 and supplied again to the blowing nozzle 21a. Note that, if necessary, a gas heater (not shown) is provided on the exit side of the dust remover 25 to prevent cooling of the reduced iron. It is preferable that the position and height of the outlet of the gas blowing nozzle 21a be as close as possible to the outlet so as not to obstruct the discharge of the line 1a in the hopper 161) into the container 6.
以上の構成からなる本発明装置の作用を以下に述べる。The operation of the apparatus of the present invention having the above configuration will be described below.
説明の便宜上、第１図に示す如く、従来装置と同様な操
作により、下部排出ホツ／ｌ！１６ｂ内には海線法１ａ
が排出され、上部二重シール弁１７１Ｌを閉状態とする
。この状態で弁ｉ８，２４ｂ。For convenience of explanation, as shown in FIG. 1, the lower discharge hot/l! Sea line method 1a is in 16b.
is discharged, and the upper double seal valve 171L is closed. In this state, valve i8, 24b.
２４Ｃは閉とする。つぎに、ホッパ１６ｂ内の海線法１
ａをコンテナ６へ排出するに先立ってブロワ２２を始動
し、弁２３１）、２３（１を開放し、リサイクルガスを
吹込ノズル２１ａから海Ｍ＠ｌａ下部へ吹込むと、海線
法１ａの表面に付着あるいは海線法の層内に混入してい
る煤はホラ／Ｊ！１６ ｂ内の上部へ吹き飛ばされ、管
路２３ｃ、２３ｅを経てガス冷却器２４に導入され、こ
こでガス温度を所要の温度に冷却した後、除じん器２５
で煤を含むダストを除去し、浄化されたガス（Ｎ２）は
ブロワ２２によシ吹込ノズル２１ａへ循環供給される。24C is closed. Next, the sea line method 1 in the hopper 16b
Before discharging a into the container 6, the blower 22 is started, the valves 231) and 23 (1 are opened, and the recycled gas is blown into the lower part of the sea M@la from the blowing nozzle 21a. The soot adhering to or mixed in the sea line layer is blown to the upper part of the hola/J!16b and introduced into the gas cooler 24 via pipes 23c and 23e, where the gas temperature is adjusted to the required level. After cooling to the temperature of
Dust containing soot is removed, and the purified gas (N2) is circulated and supplied to the blowing nozzle 21a by the blower 22.
なお、不活性ガスリサイクル管路２３および下部排出ホ
ッパ１６ｂにおけるガスの消耗分は不活性ガス発生装置
（図示せず）を設置し、不活性ガスリサイクル管路２３
に接続し補給する。かくして、ホッパ１６ｂ内の海綿秩
１ａに付着した煤を除去した後、弁２３ｂ、２３（ｌを
閉とし、以下従来装置の場合と同一手順に従って、海線
法１ａをコンテナ６へ排出し、ブリケラティングプラン
ト（図示せず）へ搬送され、所定の形状に圧縮成形され
る。In addition, an inert gas generator (not shown) is installed to replace the gas consumed in the inert gas recycling pipe 23 and the lower discharge hopper 16b.
Connect to and replenish. After removing the soot adhering to the sponge 1a in the hopper 16b, the valves 23b and 23(l) are closed, and the sea line 1a is discharged into the container 6 in accordance with the same procedure as in the conventional device. It is transported to a kerating plant (not shown) and compression molded into a predetermined shape.
な２、以上例示の装置では、下部排出ホッパ２１６ｂ内
のガス吹込ノズルをルーバ状としたが、ノズルの形式は
、これに限定するものではなく、要は、排出ホッパ１６
１）から排出される還元鉄１ａの流下を阻害することな
く、かつ、還元鉄の下部から上向きに、かつ、均一に還
元鉄の層内をガスが通過し得る構造であれば良いことは
勿論である。2. In the device illustrated above, the gas blowing nozzle in the lower discharge hopper 216b is shaped like a louver, but the nozzle type is not limited to this.
Of course, any structure is acceptable as long as it does not obstruct the flow of the reduced iron 1a discharged from 1) and allows gas to pass uniformly through the layer of reduced iron upwards from the bottom of the reduced iron. It is.
還元鉄をコンテナへ排出する前に、下部排出ホッパ内の
還元鉄の層内に不活性ガスを吹き込み、還元鉄表面に付
着あるいは層内に温大した煤を吹き飛ばすことにより、
後段のブリケットマシンにおいて、本還元装置から排出
される還元鉄を用いて極めて容易にかつ安定して、所期
形状のブリケットを成形し、生産能率を向上させること
が可能となる。下部排出ホラ／でに吹込まれる不活性ガ
スはリサイクル管路を流れて循環夏用されるので経済的
である。Before discharging the reduced iron into the container, inert gas is blown into the layer of reduced iron in the lower discharge hopper to blow away the soot that has adhered to the surface of the reduced iron or warmed within the layer.
In the subsequent briquette machine, it becomes possible to form briquettes in a desired shape very easily and stably using the reduced iron discharged from the present reducing device, thereby improving production efficiency. The inert gas blown into the lower discharge hole flows through the recycling pipe and is recycled for summer use, which is economical.
第１図は本発明の一実施例に係るシャフト炉式直接還元
装置の全体構成説明図、第２図は従来のシャフト炉式直
接還元装置の全体構成説明図を示す。
１・・・鉄鉱石原料 １ａ・・・還元鉄２・・
・シャフト炉 訃・・還元鉄排出装置１６ａ、
１６’ｂ・・・排出ホッパ ２０・・、煤発生炉２１
ａ・・・ガスノズル ２２・・・ブロワ２３・・・
不活性ガスリサイクル管路
２４・・・ガス冷却器 ２５・・・除じん装置復代
理人 弁理士開本重文
外２名FIG. 1 is an explanatory diagram of the overall configuration of a shaft furnace type direct reduction apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the entire configuration of a conventional shaft furnace type direct reduction apparatus. 1...Iron ore raw material 1a...Reduced iron 2...
・Shaft furnace...Reduced iron discharge device 16a,
16'b...discharge hopper 20..., soot generating furnace 21
a...Gas nozzle 22...Blower 23...
Inert gas recycling pipe 24...Gas cooler 25...Dust removal device Sub-agent 2 patent attorneys and non-Kaimoto important literary figures
Claims (1)
炉内に供給して粒状又はペレット状の鉄鉱石を還元鉄に
還元し、該還元鉄を高温状態で炉外へ排出する鉄鉱石の
直接還元装置において、前記還元鉄の排出装置の下部排
出ホッパ底部の内周に吹込ノズルを設け、前記吹込ノズ
ルに不活性ガスを供給するブロワを含んだ管路と前記下
部排出ホッパ上部から不活性ガスを吸引して前記ブロワ
に供給する除じん器を含んだ管路とからなる不活性ガス
リサイクル管路を設け、還元鉄から分離された煤を不活
性ガスリサイクル管路の除じん器で除去するようにした
ことを特徴とする鉄鉱石の直接還元装置。A direct reduction device for iron ore that supplies reducing gas added with fine carbon (suit) into a shaft furnace to reduce granular or pelleted iron ore to reduced iron, and discharges the reduced iron out of the furnace at a high temperature. A blowing nozzle is provided on the inner periphery of the bottom of the lower discharge hopper of the reduced iron discharge device, and the inert gas is sucked from the pipe line including a blower that supplies inert gas to the blowing nozzle and the upper part of the lower discharge hopper. and a pipe containing a dust remover to supply the blower to the blower, and the soot separated from the reduced iron is removed by the dust remover of the inert gas recycling pipe. A direct reduction device for iron ore, which is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61256997A JPS63111111A (en) | 1986-10-30 | 1986-10-30 | Direct reduction apparatus for iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61256997A JPS63111111A (en) | 1986-10-30 | 1986-10-30 | Direct reduction apparatus for iron ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63111111A true JPS63111111A (en) | 1988-05-16 |
Family
ID=17300285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61256997A Pending JPS63111111A (en) | 1986-10-30 | 1986-10-30 | Direct reduction apparatus for iron ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63111111A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106957936A (en) * | 2017-04-11 | 2017-07-18 | 江苏省冶金设计院有限公司 | A kind of system and method for reduction shaft furnace and mill choosing separation iron, vanadium and titanium |
-
1986
- 1986-10-30 JP JP61256997A patent/JPS63111111A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106957936A (en) * | 2017-04-11 | 2017-07-18 | 江苏省冶金设计院有限公司 | A kind of system and method for reduction shaft furnace and mill choosing separation iron, vanadium and titanium |
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