JPH01108320A - Method for recovering and reutilizing dust producing from metallurgical furnace - Google Patents
Method for recovering and reutilizing dust producing from metallurgical furnaceInfo
- Publication number
- JPH01108320A JPH01108320A JP26333287A JP26333287A JPH01108320A JP H01108320 A JPH01108320 A JP H01108320A JP 26333287 A JP26333287 A JP 26333287A JP 26333287 A JP26333287 A JP 26333287A JP H01108320 A JPH01108320 A JP H01108320A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- converter
- vessel
- exhaust gas
- metallurgical furnace
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011261 inert gas Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 238000009628 steelmaking Methods 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、転炉等の冶金炉の操業に於いて発生する鉄分
を多量に含んだダストを回収して再利用する方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recovering and reusing dust containing a large amount of iron generated during the operation of a metallurgical furnace such as a converter.
［従来の技術とその問題点］
転炉等の冶金炉の操業、所謂酸素戦線では、高温・高含
塵のガスが多量に発生する。[Prior art and its problems] During the operation of a metallurgical furnace such as a converter, a so-called oxygen front, a large amount of high-temperature, highly dust-containing gas is generated.
従来、この高温・高含塵ガスを処理するには、燃焼型排
ガス処理方法、非燃焼型排ガス処理方法のいずれかの方
法により処理していた。この２ｆｉ理方法を含め従来の
排ガス処理方法は、先ず冶金炉からの排ガスをボイラ方
式又は温水冷却方式等の適当な冷却方式を用いてガス温
度を１０００℃以下にした後、湿式ベンチエリ−等の集
塵器により排ガス中のダストを除去している。集塵器で
除去されたダストは、集塵水中に浮遊するかたちで捕集
される為、このままでは何らの利用価値が無いばかりで
はなく、＆悪水系諸設備内へのダストの付着、堆積が生
じ、さらに未処理のまま排出することは、工場排水の汚
染源となる等の問題があった。Conventionally, this high temperature, high dust content gas has been treated by either a combustion type exhaust gas treatment method or a non-combustion type exhaust gas treatment method. Conventional exhaust gas treatment methods, including this 2-fi process, first reduce the gas temperature of the exhaust gas from the metallurgical furnace to 1000°C or less using an appropriate cooling method such as a boiler method or hot water cooling method, and then A dust collector removes dust from exhaust gas. The dust removed by the dust collector is collected in the form of floating in the dust collection water, so it not only has no use value in this state, but also causes dust to adhere and accumulate in various water system facilities. If such waste is produced and then discharged untreated, there are problems such as becoming a source of contamination of factory wastewater.
この為、集塵水により捕集されたダストは、シックナー
等の沈降装置により成る程度濃縮した後、ドラムフィル
ターやフィルタープレス等の脱水設備を用いて、含水量
３０％程度のケーキとして処理されるのが普通である。For this reason, the dust collected by the dust collection water is concentrated to a certain extent using a sedimentation device such as a thickener, and then processed into a cake with a water content of approximately 30% using dehydration equipment such as a drum filter or filter press. is normal.
また、この脱水ケーキは多量の鉄分を含有している為、
さらに加熱乾燥して、焼結鉱製造原料の一部として利用
されている。しかしこのダスト処理に要する設備投資類
、運転費用はかなりのものであり、排ガスダストの再利
用価値を低減させており、しかも１ｏｏｏ’ｅ程度の排
ガスに散水して除塵し、除塵後は７０〜８０℃の低温ガ
スとする為、高温排ガスの保有する熱エネルギーを有効
に再回収できない等の欠点があった。In addition, since this dehydrated cake contains a large amount of iron,
It is then heated and dried and used as part of the raw material for producing sintered ore. However, the equipment investment and operating costs required for this dust treatment are considerable, reducing the reuse value of exhaust gas dust, and moreover, the dust is removed by sprinkling water on about 100'e of exhaust gas, and after dust removal it is 70~70~ Since the gas is at a low temperature of 80°C, there are drawbacks such as the inability to effectively recover the thermal energy held by the high-temperature exhaust gas.
これらの欠点を解消し、且つ高温排ガスの保有する熱エ
ネルギーを有効に回収し、再利用しようとする目的から
転炉排ガス処理設備の集塵器を乾式集塵器とする提案が
なされている。（特開昭６１−２３８３１６号、特開昭
６２−９３３０８号公報参照）然し乍ら、これらの提案
は、いずれも排ガス中のダストを乾式集塵器により捕集
することを目的としたものであり、捕集後のダストの処
理については言及されていない。In order to eliminate these drawbacks and to effectively recover and reuse the thermal energy possessed by high-temperature exhaust gas, it has been proposed to use a dry type dust collector as the dust collector for converter exhaust gas treatment equipment. (Refer to JP-A-61-238316 and JP-A-62-93308.) However, all of these proposals are aimed at collecting dust in exhaust gas using a dry dust collector; There is no mention of how to dispose of the dust after collection.
現実の問題として転炉からのダスト、特に非燃焼方式の
転炉排ガス処理設備により捕集されたダストは、鉄分を
９０％以上含み、さらにこの鉄分は酸化度の低いＭ４ｅ
、 Ｆｅｄ、 Ｆ２Ｏ，がほとんどであるため、高温の
まま酸化性ガス（空気を含む）と接触すると容易に酸化
発熱反応が進行し、局部的な過熱部分が生じて、設備や
機器部分の焼損が生じたり、さらには酸化性ガス中に浮
遊する状態では粉塵爆発を生ずる等の危険性を有するも
のである。また転炉の操業は４０〜６０分を１サイクル
とするバッチ操業であることから、高温排ガスと大気と
が順番に転炉排ガス処理設備内を流れることになり、常
に未酸化の高温ダストと大気が接触・混合する機会が存
在し、上述の危険性が増々増加するものである。従って
、乾式集塵器により捕集された未燃焼ダストの安全且つ
確実なハンドリング方法の開発・確立が望まれている。As a practical matter, dust from converters, especially dust collected by non-combustion type converter exhaust gas treatment equipment, contains more than 90% iron, and this iron content is M4e, which has a low degree of oxidation.
, Fed, and F2O, so if they come into contact with oxidizing gases (including air) at high temperatures, oxidative exothermic reactions will easily proceed, causing local overheating and causing burnout of equipment and equipment. There is a danger of causing a dust explosion if the dust is generated or even suspended in an oxidizing gas. In addition, since converter operation is a batch operation with one cycle lasting 40 to 60 minutes, high-temperature exhaust gas and the atmosphere flow through the converter exhaust gas treatment equipment in sequence, so there is always unoxidized high-temperature dust and atmospheric air. There is an opportunity for these substances to come into contact and mix, increasing the risks mentioned above. Therefore, it is desired to develop and establish a safe and reliable handling method for unburned dust collected by a dry dust collector.
従来、乾ダストの処理方法としては、特開昭５９−２５
９３６号公報に示されるものがある。この方法は、捕集
ダストを酸化性ガスと接触させ、積極的に酸化発熱反応
を促進させ、この反応熱によりダストを高温にすると同
時に少量の石灰石を混入して、圧縮成形により成形物と
してダストを取り出すものである。Conventionally, as a method for treating dry dust, Japanese Patent Application Laid-Open No. 59-25
There is one shown in Publication No. 936. In this method, the collected dust is brought into contact with an oxidizing gas to actively promote an oxidative exothermic reaction, and the heat of this reaction raises the dust to a high temperature. At the same time, a small amount of limestone is mixed in, and the dust is compressed into a molded product. This is to extract the .
しかし、この方法では、酸化度の進んだダスト（燃焼式
排ガス処理設備等において捕集したダスト）に対しては
、別にダスト温度を上昇させる為の熱源を必要とするこ
と、装置の駆動部分が高温のダストと接触する為高級な
材料を使用し、且つ摩耗等に対する対策を十分にとる必
要があること、酸化度の低いダストを強制的に酸化させ
る為ダストの利用価値が低下すること、圧縮成形する為
粉体として再利用する場合には粉砕を必要とすること、
乾ダストの素密度は０．６前後であり、これを圧縮成形
するには４〜５倍の圧縮比を必要とし、設備が大きく、
運転コストが大きくなり、経済価値が低下し、回収ダス
トの評価が下がること等の問題をかかえている。However, this method requires a separate heat source to raise the dust temperature for highly oxidized dust (dust collected in combustion-type exhaust gas treatment equipment, etc.), and the driving part of the device is Because it comes into contact with high-temperature dust, it is necessary to use high-grade materials and take sufficient measures to prevent wear, etc., the dust with a low degree of oxidation is forcibly oxidized, which reduces the utility value of the dust, and compression When reusing it as a powder for molding, pulverization is required;
The elementary density of dry dust is around 0.6, and compression molding requires a compression ratio of 4 to 5 times, requiring large equipment.
There are problems such as increased operating costs, decreased economic value, and lower evaluation of collected dust.
［発明の目的］
本発明は上記問題点を解決すべくなされたもので、冶金
炉排ガス処理設備の乾式集塵器により捕集された乾ダス
トをその性状を変化させることなく回収再利用する方法
′８提供することを目的とするものである。[Object of the Invention] The present invention was made to solve the above problems, and provides a method for collecting and reusing dry dust collected by a dry dust collector of metallurgical furnace exhaust gas treatment equipment without changing its properties. '8.
［問題点を解決するための手段］
上記問題点を解決するための本発明の技術的手段は、冶
金炉の操業に於いて発生する鉄分を多量に含むダストを
、冶金炉排ガス処理設備の乾式集塵器にて捕集した後、
この捕集した高温乾ダストを不活性ガスにより外気と遮
断して酸化度を変化させることなく定量的に容器に取出
し、然る後製鋼原料として所要の利用先に送給すること
を特徴とするものである。[Means for Solving the Problems] The technical means of the present invention for solving the above-mentioned problems is to remove dust containing a large amount of iron generated during the operation of metallurgical furnaces into a dry type of metallurgical furnace exhaust gas treatment equipment. After collecting it with a dust collector,
The collected high-temperature dry dust is isolated from the outside air using an inert gas, quantitatively taken out into a container without changing the degree of oxidation, and then sent to the desired user as a steelmaking raw material. It is something.
［作 用］
上述の如く本発明による冶金炉から発生するダストの回
収再利用方法は、乾式集塵器にて捕集した鉄分を多量に
含む高温乾ダストを不活性ガスにより外気と遮断して酸
化度を変化させることなく定量的に容器に取出すので、
ダストの製鋼原料としての利用価値が低下することが無
く、また高温乾ダストの保有する熱エネルギーが大幅に
減少することが無い。従って高温乾ダストそのものを製
銅原料として有効に利用できると共に高温乾ダストの保
有する熱エネルギーも有効に利用できる。[Function] As described above, the method of collecting and reusing dust generated from a metallurgical furnace according to the present invention is to isolate high-temperature dry dust containing a large amount of iron collected by a dry dust collector from the outside air using an inert gas. Because it is quantitatively taken out into a container without changing the degree of oxidation,
The utility value of the dust as a raw material for steelmaking does not decrease, and the thermal energy possessed by the high-temperature dry dust does not decrease significantly. Therefore, the high-temperature dry dust itself can be effectively used as a raw material for copper manufacturing, and the thermal energy possessed by the high-temperature dry dust can also be effectively used.
［実施例］
本発明の冶金炉から発生するダストの回収再利用方法の
一実施例を説明する。[Example] An example of the method for collecting and reusing dust generated from a metallurgical furnace according to the present invention will be described.
先ず末法を実施する為の設備の概要を第１図によって説
明すると、１は転炉、２は転炉排ガス処理設備のガス冷
却器、３はガス冷却器２に接続された乾式集塵器、４は
排ガス通路である。乾式集塵器３の下方に排出管５を介
して容器６を接続して配し、容器６の下方に排出管７を
介してダスト搬送機８をその一端に接続して配し、ダス
ト搬送機８の他端に排出管９を介して容器１０を接続し
て配し、容器１０の下端にダスト搬送管１１を設けてそ
の先端を前記ガス冷却器２の下端部に接続している。前
記排出管５，７．９の途中及び搬送管１１の入口には夫
々シール弁（又はダンパー等）１２゜１３、１４．１５
を有し、このシール弁１２．１３．１４．１５は電気又
は圧縮空気若しくは油圧等により駆動されるようになり
ている。前記乾式集塵器３の下部、容器６．容器ｌＯに
は、夫々パージ又は／及び加圧の為の不活性ガスを噴出
するノズル１６．１７゜１８が所要数段けられ、夫々の
ノズル１Ｂ、 １７．１８には電磁弁等の０Ｎ−ＯＦＦ
弁１９．２０．２１が設けられている。２２は容器６．
１０に設けたレベル計である。First, the outline of the equipment for carrying out the waste disposal method will be explained with reference to Fig. 1. 1 is a converter, 2 is a gas cooler of the converter exhaust gas treatment equipment, 3 is a dry type dust collector connected to the gas cooler 2, 4 is an exhaust gas passage. A container 6 is connected to and placed below the dry dust collector 3 via a discharge pipe 5, and a dust conveyor 8 is connected to one end of the container 6 through a discharge pipe 7. A container 10 is connected to the other end of the machine 8 via a discharge pipe 9, and a dust conveying pipe 11 is provided at the lower end of the container 10, the tip of which is connected to the lower end of the gas cooler 2. Seal valves (or dampers, etc.) 12, 13, 14, 15 are installed in the middle of the discharge pipes 5, 7.9 and at the entrance of the conveyance pipe 11, respectively.
The seal valves 12, 13, 14, 15 are driven by electricity, compressed air, hydraulic pressure, or the like. Lower part of the dry dust collector 3, container 6. The container IO is equipped with a required number of nozzles 16, 17, 18 for ejecting inert gas for purging and/or pressurization, and each nozzle 1B, 17, 18 is equipped with an ON valve such as a solenoid valve. OFF
Valves 19.20.21 are provided. 22 is a container 6.
This is a level meter installed at 10.
次に上述の如く構成された設備を用いてダストを回収し
再利用する方法について説明する。転炉１の操業（吹錬
）中発生した鉄分を多量に含むダストは１５００℃前後
の排ガスと共にガス冷却器２を通って冷却され、約１０
００℃で乾式集塵器３に入ってダストが集塵され、排ガ
スは排ガス通路４を通って流れていく。乾式集塵器３で
集塵されたダストは、転炉１の操業期間中開かれている
シール弁１２を有する排出管５を通って容器６内に貯留
される。転炉１の操業（吹錬）が終了すると、直ちに０
Ｎ−ＯＦＦ弁１９．２０が開かれてノズル１６．１７か
ら不活性ガスが噴出されると同時にシール弁１２が閉じ
られてダストが容器６内へ流入するのが阻止される。そ
の結果乾式集塵器３の排ガスはパージされ、容器６内が
加圧される。次いで容器６の下側のシール弁１３、容器
１０の上側のシール弁１４が開かれると同時にダスト搬
送機８の運転が開始され、容器６内のダストが不活性ガ
スの圧力により排出管７を通してダスト搬送機８に排出
され、該ダスト搬送機８にて搬送され、他端の排出管９
を通して容器１０内に流入貯留される。やがて容器１０
内のダストが設定された最高のレベル又は、容器６内の
ダストが最低のレベルに達したことがレベル計２２によ
り検出されると、シール弁１３が閉じられると共に０Ｎ
−ＯＦＦ弁１９．２０が閉じられる。従って容器６から
のダストの排出が停止し、ノズル１８．１７からの不活
性ガスの噴出が停止する。次いで搬送機８が停止せしめ
られると同時にシール弁１４が閉じられる。次に０Ｎ−
ＯＦＦ弁２１が開かれてノズル１８より容器ｌＯ内に不
活性ガスが噴出され、所定の圧力に達したならば０Ｎ−
ＯＦＦ弁２１を閉じて不活性ガスの噴出を停止する。次
いで転炉排ガス処理設備の図示せぬ８引送風機の停止又
は回転数の低下、もしくは誘引送風機人口ダンパー又は
転炉排ガス処理設備に設置されている炉内圧制御ダンパ
ーを閉めることにより誘引ガス量が零又は最小風量にな
ったならばダスト搬送管１１のシール弁１５を開いて容
器１０のダストを不活性ガスの圧力によりダスト搬送管
１１を通して送り、ガス冷却器２の下端部より製鋼原料
として転炉１内に投入する。容器１０内のダストが送り
出され、レベル計２２により設定されたダストの最低の
レベルが検出されると、シール弁１５が閉じられる。そ
して再びシール弁１２が開とされ転炉１の操業（吹錬）
が開始される。これら−連のダストの回収再利用の為の
各機器の作動はシーケンシャルに制御され、これのタイ
ムチャートは第２図に示す通りである。Next, a method of collecting and reusing dust using the equipment configured as described above will be explained. Dust containing a large amount of iron generated during the operation (blowing) of the converter 1 passes through the gas cooler 2 together with the exhaust gas at around 1500°C, and is cooled down to about 10°C.
The dust enters the dry dust collector 3 at 00°C and is collected, and the exhaust gas flows through the exhaust gas passage 4. The dust collected by the dry dust collector 3 is stored in a container 6 through a discharge pipe 5 having a seal valve 12 that is kept open during the operating period of the converter 1. Immediately after the operation (blowing) of converter 1 is completed, the
N-OFF valve 19.20 is opened and inert gas is ejected from nozzle 16.17, and at the same time seal valve 12 is closed to prevent dust from flowing into container 6. As a result, the exhaust gas from the dry dust collector 3 is purged and the inside of the container 6 is pressurized. Next, the seal valve 13 on the lower side of the container 6 and the seal valve 14 on the upper side of the container 10 are opened, and at the same time, the operation of the dust conveyor 8 is started, and the dust in the container 6 is passed through the discharge pipe 7 by the pressure of the inert gas. The dust is discharged to the dust conveyor 8, conveyed by the dust conveyor 8, and the discharge pipe 9 at the other end
The water flows through the container 10 and is stored therein. Eventually container 10
When the level meter 22 detects that the dust in the container 6 has reached the set maximum level or the minimum level, the seal valve 13 is closed and the 0N
-OFF valve 19.20 is closed. Therefore, the discharge of dust from the container 6 is stopped, and the ejection of inert gas from the nozzle 18.17 is stopped. Next, the conveyor 8 is stopped and at the same time the seal valve 14 is closed. Then 0N-
The OFF valve 21 is opened and the inert gas is spouted from the nozzle 18 into the container lO, and when the predetermined pressure is reached, 0N-
The OFF valve 21 is closed to stop blowing out the inert gas. Next, the amount of induced gas is reduced to zero by stopping or lowering the rotation speed of the 8 draft fans (not shown) in the converter exhaust gas treatment equipment, or by closing the induced draft fan artificial damper or the furnace internal pressure control damper installed in the converter exhaust gas treatment equipment. Alternatively, when the air volume reaches the minimum, open the seal valve 15 of the dust conveyance pipe 11 and send the dust in the container 10 through the dust conveyance pipe 11 under the pressure of inert gas, and send it to the converter furnace as a raw material for steelmaking from the lower end of the gas cooler 2. Insert within 1. When the dust in the container 10 is sent out and the lowest dust level set by the level meter 22 is detected, the seal valve 15 is closed. Then, the seal valve 12 is opened again and the converter 1 is operated (blowing).
is started. The operation of each of these devices for collecting and reusing dust is sequentially controlled, and a time chart of this is shown in FIG.
かくして上述の如く転炉１内に投入されたダストは、回
収時外気と完全に遮断されて接触せず、従って酸化度に
変化が無く、製鋼原料として有効に利用できる。また回
収したダストの温度は転炉投入時でも４００℃もあるの
でダストの保有する熱エネルギーを製鋼時有効に利用で
きる。Thus, the dust charged into the converter 1 as described above is completely isolated from the outside air during recovery and does not come into contact with it, so there is no change in the degree of oxidation and it can be effectively used as a raw material for steelmaking. Furthermore, since the temperature of the collected dust is as high as 400°C even when it is put into the converter, the thermal energy possessed by the dust can be effectively used during steel manufacturing.
尚、上記実施例は転炉から発生するダストの回収再利用
方法の場合であるが、転炉に限るものではない、また排
ガス処理設備は乾式集塵器を有するものならば、非燃焼
式、燃焼式に限るものではない、さらに上記実施例では
回収したダストを製鋼用原料として直接転炉内に投入し
ているが、容器６の下側に設けられたダスト搬送機８を
介して他の貯蔵タンクへ穆送し、フエライト工業等他の
圧送しているが、ダストの自重を利用した自然落下によ
って行っても良い。The above example is a method for collecting and reusing dust generated from a converter, but it is not limited to converters. Also, if the exhaust gas treatment equipment has a dry dust collector, it can be a non-combustion type, Furthermore, in the above embodiment, the collected dust is directly input into the converter as a raw material for steelmaking, but it is not limited to the combustion type. Although the dust is sent to a storage tank under pressure by other means such as Ferrite Industries, it may also be carried out by gravity using the weight of the dust.
［発明の効果］
以上の説明で判るように本発明の冶金炉から発生するダ
ストの回収再利用方法は、乾式集塵器にて捕集した鉄分
を多量に含む高温乾ダストを不活性ガスにより外気と遮
断して酸化度を変化させることなく定量的に容器に取り
出すので、ダストの製鋼原料としての利用価値が低下す
ることが無く、また高温乾ダストの保有する熱エネルギ
ーが大幅に減少することが無い、従って、高温乾ダスト
そのものを製鋼原料として有効利用できることは勿論の
こと保有する熱エネルギーを有効利用できる。[Effects of the Invention] As can be seen from the above explanation, the method for collecting and reusing dust generated from a metallurgical furnace of the present invention is to collect and reuse high-temperature dry dust containing a large amount of iron collected by a dry dust collector using an inert gas. Since it is isolated from the outside air and quantitatively taken out into a container without changing the degree of oxidation, the utility value of the dust as a raw material for steelmaking does not decrease, and the thermal energy held by the high-temperature dry dust is significantly reduced. Therefore, not only can the high-temperature dry dust itself be used effectively as a raw material for steelmaking, but also the thermal energy it possesses can be used effectively.
また高温乾ダストの回収系に駆動部を必要としないので
、高級な材料を使用する必要が無く、構造簡単、製作容
易で安価なダスト回収設備を、乾式集塵器を有する排ガ
ス処理設備を付設するだけで本発明によるダストの回収
再利用方法を実現できる。In addition, since the high-temperature dry dust collection system does not require a drive unit, there is no need to use high-grade materials, and the dust collection equipment is simple in structure, easy to manufacture, and inexpensive, and exhaust gas treatment equipment with a dry dust collector is attached. The dust collection and reuse method according to the present invention can be realized by simply doing the following.
【図面の簡単な説明】
第１図は本発明による冶金炉から発生するダストの回収
再利用方法の一実施例に用いられる設備を示す図、第２
図はそのダストの回収再利用方法に用いられる設備にお
ける各機器の作動のタイムチャートを示す図である。
１・・・転炉（冶金炉）、２・・・ガス冷却器、３・・
・乾式集塵器、 ４・・・排ガス通路、５．７．９・
・・排出管、６．１０・・・容器、８・・・ダスト搬送
機、 １１・・・ダスト搬送管、１２、１３．１４．１
５・・・シール弁（又はシールダンパー）、
１６、１７．１８・・・ノズル、１９．２０．２１・・
・０Ｎ−ＯＦＦ弁、２２・・・レベル計。[Brief Description of the Drawings] Fig. 1 is a diagram showing equipment used in an embodiment of the method for collecting and reusing dust generated from a metallurgical furnace according to the present invention;
The figure is a diagram showing a time chart of the operation of each device in the equipment used in the dust collection and reuse method. 1... Converter (metallurgical furnace), 2... Gas cooler, 3...
・Dry dust collector, 4...Exhaust gas passage, 5.7.9・
...Discharge pipe, 6.10... Container, 8... Dust conveyor, 11... Dust conveyor pipe, 12, 13.14.1
5... Seal valve (or seal damper), 16, 17.18... Nozzle, 19.20.21...
・0N-OFF valve, 22...level meter.
Claims (1)
を、冶金炉排ガス処理設備の乾式集塵器にて捕集した後
、この捕集した高温乾ダストを不活性ガスにより外気と
完全に遮断して酸化度を変化させることなく定量的に容
器に取出し、然る後製鋼原料として所要の利用先に送給
することを特徴とする冶金炉から発生するダストの回収
再利用方法。The dust containing a large amount of iron generated during the operation of a metallurgical furnace is collected by the dry dust collector of the metallurgical furnace exhaust gas treatment equipment, and then the collected high-temperature dry dust is completely separated from the outside air using an inert gas. A method for collecting and reusing dust generated from a metallurgical furnace, characterized by shutting it off, quantitatively taking it out into a container without changing the degree of oxidation, and then sending it to a desired user as a steelmaking raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26333287A JPH01108320A (en) | 1987-10-19 | 1987-10-19 | Method for recovering and reutilizing dust producing from metallurgical furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26333287A JPH01108320A (en) | 1987-10-19 | 1987-10-19 | Method for recovering and reutilizing dust producing from metallurgical furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01108320A true JPH01108320A (en) | 1989-04-25 |
| JPH0586457B2 JPH0586457B2 (en) | 1993-12-13 |
Family
ID=17388002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26333287A Granted JPH01108320A (en) | 1987-10-19 | 1987-10-19 | Method for recovering and reutilizing dust producing from metallurgical furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01108320A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010189714A (en) * | 2009-02-18 | 2010-09-02 | Nippon Steel Corp | Ventilation dust collection method in converter |
| WO2013179744A1 (en) * | 2012-05-30 | 2013-12-05 | 月島機械株式会社 | Method for transporting impurities in pressurized fluidized furnace system |
-
1987
- 1987-10-19 JP JP26333287A patent/JPH01108320A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010189714A (en) * | 2009-02-18 | 2010-09-02 | Nippon Steel Corp | Ventilation dust collection method in converter |
| WO2013179744A1 (en) * | 2012-05-30 | 2013-12-05 | 月島機械株式会社 | Method for transporting impurities in pressurized fluidized furnace system |
| US10001277B2 (en) | 2012-05-30 | 2018-06-19 | Tsukishima Kikai Co., Ltd. | Method for conveying impurities in pressurized fluidized bed incinerator system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0586457B2 (en) | 1993-12-13 |
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