JPH0230709A - Method and apparatus for recovering and utilizing dust generating in molten iron pre-treatment - Google Patents
Method and apparatus for recovering and utilizing dust generating in molten iron pre-treatmentInfo
- Publication number
- JPH0230709A JPH0230709A JP17985588A JP17985588A JPH0230709A JP H0230709 A JPH0230709 A JP H0230709A JP 17985588 A JP17985588 A JP 17985588A JP 17985588 A JP17985588 A JP 17985588A JP H0230709 A JPH0230709 A JP H0230709A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- collected
- hot metal
- flux
- solvent
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims description 10
- 238000002203 pretreatment Methods 0.000 title abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 10
- 229910052742 iron Inorganic materials 0.000 title abstract 5
- 239000002904 solvent Substances 0.000 claims abstract description 42
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 48
- 229910052751 metal Inorganic materials 0.000 claims description 48
- 239000012046 mixed solvent Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract description 8
- 235000017550 sodium carbonate Nutrition 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 229910014813 CaC2 Inorganic materials 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract 1
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910000805 Pig iron Inorganic materials 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は溶銑予備処理発生ダストの回収利用方法および
その装置に係り、特に回収した集塵ダストを有効に再利
用できる方法および装置に関し、溶銑予備処理の分野で
利用される。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for collecting and utilizing dust generated from hot metal pretreatment, and particularly relates to a method and apparatus for effectively reusing collected dust. Used in the field of pretreatment.
近年、転炉における脱りん、脱硫の負荷を軽減し、かつ
Ｍｎ鉱石からのＭｎの回収を効率的に行う目的から、高
炉から転炉工場までの混銑車による溶銑の輸送の途中で
混銑車炉中で溶銑の予備処理が行われることが多くなっ
て来た。しかし溶銑の予備処理は混銑車を処理容器とす
る場合のみならず、溶銑鍋を処理容器とする場合のほか
転炉を処理容器とする場合もある。本発明は主として混
銑車と溶銑鍋を、処理容器とする場合に適用できるもの
である。In recent years, in order to reduce the load of dephosphorization and desulfurization in the converter and to efficiently recover Mn from Mn ore, a mixer car furnace has been introduced during the transport of hot metal from the blast furnace to the converter factory using a mixer car. Increasingly, hot metal is pre-treated inside. However, preliminary treatment of hot metal is not limited to cases in which a pig iron mixing car is used as a processing container; in addition to cases in which a hot metal ladle is used as a processing container, there are also cases in which a converter is used as a processing container. The present invention is mainly applicable to cases where a pig iron mixing car and a hot metal ladle are used as processing vessels.
溶銑の予備処理は、現在石灰系の溶銑予備処理剤を使用
する場合と、ソーダ灰系の溶銑予備処理剤を使用する場
合があるが、いずれの場合も現状では集ｍ機に吸収され
た溶銑予備処理剤は廃棄物処理されている。Currently, hot metal pre-treatment involves using lime-based hot metal pre-treatment agents or soda ash-based hot metal pre-treatment agents, but in both cases, currently the hot metal that has been absorbed into the collector is The pretreatment agent is treated as waste.
しかし、インジェクター、ランス等を介して溶銑内に吹
込まれた処理溶剤は、溶銑中をキャリアーガスの気泡の
中で移動し反応し一部は鉱滓の表面に吸収され、残部は
排ガスに浮遊して排出される。更に、ランスが溶銑に挿
入される前および作業終了後に溶銑から離れた時は溶剤
は溶銑と反応することなく排ガスに排出される。従って
これらの溶銑予備処理における排ガスを集塵機で処理し
て回収した集塵ダストは有用な成分を含有しており１例
えばソーダ灰を処理溶剤として使用した場合は集塵ダス
ト中のソーダ灰の含有量は５０〜６０％に達することが
あり、これらを廃棄することは資源の乏しい我が国にと
っては大きな問題である。However, the processing solvent that is injected into the hot metal via an injector, lance, etc. moves through the hot metal in carrier gas bubbles and reacts, with some of it being absorbed on the surface of the slag and the rest floating in the exhaust gas. be discharged. Furthermore, before the lance is inserted into the hot metal and when it is separated from the hot metal after the operation is completed, the solvent is discharged into the exhaust gas without reacting with the hot metal. Therefore, the collected dust collected by treating the exhaust gas from these hot metal pretreatments with a dust collector contains useful components.1For example, when soda ash is used as a processing solvent, the content of soda ash in the collected dust can reach 50 to 60%, and disposing of these is a big problem for our country, which is poor in resources.
従って従来、集塵機で回収したこれらの集塵ダストを溶
銑予備処理で再利用する方法が、特開昭５１−１４３５
０７、特開昭５１−９９６１４゜特開昭６１−２２７１
１６等で提案されている。Therefore, there is a conventional method of reusing the collected dust collected by a dust collector in hot metal pretreatment, as disclosed in Japanese Patent Application Laid-Open No. 51-1435.
07, JP 51-99614° JP 61-2271
It has been proposed as 16th mag.
例えば特開昭５１−１４３５０７では第２図に示す如く
、混銑車２で発生した排ガスは、集塵フード４、ファン
５を経て集塵機６において発生ダストが回収され、集塵
ダスＩ−タンク８に貯蔵される。For example, in JP-A-51-143507, as shown in FIG. stored.
一方、別に設けられた脱硫溶剤タンク１０と集塵ダスト
タンク８とは配管１２で連通しており集塵ダストと脱硫
溶剤は同一の配管１．２によってランス１４を介して混
銑車２内の溶銑１６に吹込まれる。また、特開昭５１−
９９６１４、特開昭６１−２２７１６も集塵機で補集し
た集塵ダストを処理溶剤として溶銑に吹込み再利用する
ものである。On the other hand, the desulfurization solvent tank 10 and the dust collection tank 8, which are provided separately, are connected through a pipe 12, and the dust collection and the desulfurization solvent are transferred to the hot metal in the pig iron mixer car 2 via the lance 14 through the same pipe 1.2. It is blown into 16. Also, JP-A-51-
No. 99614 and JP-A No. 61-22716 also reuse the dust collected by a dust collector by blowing it into hot metal as a treatment solvent.
しかしながら、これらの予備処理の集塵ダストは５μｍ
以下が９０％を占め非常に微粉であるので配管が途中で
閉塞しやすい。また、ランスを通して溶銑内に吹込むた
めには、ディスペンサーで５〜７ ｋｇ／ａｊＧの加圧
が必要であるが、その際固化してランスが詰まる原因と
なり、吹込みが順調にできない。また、特開昭５１−１
４３５０７では集塵ダストに脱硫溶剤を同一配管で送付
しているが、単に同一配管で送付するのみでは両者の混
合が不十分でその混合の効果がなく配管は閉塞しやすく
、また処理溶剤タンクは一基のみなので脱硫。However, the collected dust of these pre-treatments is 5μm
The powder below accounts for 90% of the powder and is very fine, so pipes are likely to get clogged in the middle. In addition, in order to blow into hot metal through a lance, it is necessary to apply pressure of 5 to 7 kg/ajG with a dispenser, but at that time, solidification may cause clogging of the lance, making it impossible to blow smoothly. Also, JP-A-51-1
In 43507, the desulfurization solvent is sent to the collected dust through the same pipe, but simply sending the desulfurization solvent through the same pipe does not mix the two sufficiently, resulting in no mixing effect and the pipe is likely to become clogged, and the processing solvent tank is Since there is only one unit, it is desulfurized.
脱りん等のそれぞれの反応に必要な種々の成分の処理溶
剤を得ることができない等の問題点がある。There are problems such as the inability to obtain processing solvents for various components necessary for each reaction such as dephosphorization.
本発明の目的は、上記従来技術の問題点を解決し、溶銑
予備処理で発生した集塵ダストを固化による配管の閉塞
を防止し、最適成分の処理溶剤として再利用できる溶銑
予備処理発生ダストの回収利用方法およびその装置を提
供するにある。The purpose of the present invention is to solve the above-mentioned problems of the prior art, to prevent the collected dust generated in the hot metal pretreatment from clogging pipes due to solidification, and to prevent the dust generated in the hot metal pretreatment to be reused as a treatment solvent with optimal components. The purpose of the present invention is to provide a recovery and utilization method and a device therefor.
〔問題点を解決するための手段および作用〕本発明の上
記の目的は次の２発明によって達成される。[Means and effects for solving the problems] The above objects of the present invention are achieved by the following two inventions.
第１発明の要旨とするところは次の如くである。The gist of the first invention is as follows.
すなわち、溶銑予備処理容器で発生したダストを集塵機
で回収し、前記回収した集塵ダストをディスペンサーに
て加圧しランスを介して前記容器の溶銑に吹込む溶銑予
備処理発生ダストの回収利用方法において、前記溶銑予
備処理容器で発生したダストを複数の集塵機で回収しこ
れらを１個所に集めて貯蔵する工程と、複数の溶剤を種
類別に貯蔵する工程と、前記の集めて貯蔵した集塵ダス
トと種類別に貯蔵した溶剤を混合する工程と、前記の混
合した溶剤をディスペンサーにて加圧しランスを介して
前記容器の溶銑に吹込む工程と、を有して成ることを特
徴とする溶銑予備処理発生ダストの回収利用方法である
。That is, in a method for collecting and utilizing dust generated in hot metal pretreatment, in which dust generated in a hot metal pretreatment container is collected by a dust collector, the collected dust is pressurized by a dispenser, and then blown into the hot metal in the container via a lance, A step of collecting the dust generated in the hot metal pretreatment container with a plurality of dust collectors and collecting and storing them in one place, a step of storing a plurality of solvents by type, and a step of collecting and storing the collected dust and the types thereof. A hot metal pretreatment generated dust characterized by comprising the steps of: mixing a separately stored solvent; and pressurizing the mixed solvent with a dispenser and blowing it into the hot metal in the container via a lance. This is a method of collecting and using.
第２発明の要旨とするところは次の如くである。The gist of the second invention is as follows.
すなわち、溶銑予備処理容器で発生したダストを集塵機
で回収し、前記の回収した集塵ダストをディスペンサー
にて加圧しランスを介して前記容器の溶銑に吹込む溶銑
予備処理発生ダストの回収利用装置において、複数の集
塵機と、前記複数の集塵機で回収した集塵ダストを集め
て貯蔵する集合ダストホッパーと、複数の種類別の溶剤
ホッパーと、前記集合ダストホッパーおよび溶剤ホッパ
ーの原料を混合する溶剤ミキサーと、を有して成ること
を特徴とする溶銑予備処理発生ダストの回収利用装置で
ある。That is, in an apparatus for collecting and utilizing dust generated in hot metal pretreatment, the dust generated in a hot metal pretreatment container is collected by a dust collector, the collected dust is pressurized by a dispenser, and then blown into the hot metal in the container through a lance. , a plurality of dust collectors, a collecting dust hopper that collects and stores the collected dust collected by the plurality of dust collectors, a plurality of type-specific solvent hoppers, and a solvent mixer that mixes raw materials for the collecting dust hoppers and the solvent hopper. This is an apparatus for collecting and utilizing dust generated from hot metal pretreatment, characterized by comprising the following.
本発明の詳細を実施例により説明する。先ず第１図によ
り本発明の詳細な説明する。第２図の従来の装置と同一
の部分は重複するので説明を省略する。本実施例におい
ては３基の集塵機６が設置されており、これらの集塵ダ
スト３４を１個所に集めて貯蔵するダストホッパー１８
が設けられ、両者は配管２ｏにて連絡している。また、
種類別の複数の溶剤ホッパー２２が設けられているが、
実施例ではＣａＦ、（２２Ａ）、ＣａＣ，（２２Ｂ）。The details of the present invention will be explained by examples. First, the present invention will be explained in detail with reference to FIG. Since the same parts as those of the conventional device shown in FIG. 2 are redundant, their explanation will be omitted. In this embodiment, three dust collectors 6 are installed, and a dust hopper 18 collects and stores the collected dust 34 in one place.
are provided, and both are connected via piping 2o. Also,
Although a plurality of solvent hoppers 22 are provided for each type,
Examples include CaF, (22A) and CaC, (22B).
ＣａＯ（２２Ｃ）、ソーダ灰（２２Ｄ）用の４基が図示
されている。これらの集合ダストホッパー１８と溶剤ホ
ッパー２２の下流にはこれらを混合する溶剤ミキサー２
６が設けられ配管２４で連絡している。溶剤ミキサー２
６の下流には、ディスペンサー２８が設けられ、ランス
台車３０、ランスガイドフレーム３２に支持されたラン
ス１４により混合した処理溶剤を混銑車２の溶銑１６に
吹込むことができる。Four units are shown for CaO (22C) and soda ash (22D). A solvent mixer 2 is provided downstream of these collecting dust hopper 18 and solvent hopper 22 to mix them.
6 are provided and communicated by piping 24. Solvent mixer 2
A dispenser 28 is provided downstream of the pump 6 and can blow the mixed processing solvent into the hot metal 16 of the pig iron mixer 2 using the lance 14 supported by the lance truck 30 and the lance guide frame 32.
次に上記の装置を使用した本発明の発生ダストの回収利
用方法を説明する。混銑車２の溶銑１６を予備処理して
発生したダストは集塵フード４、ファン５等により３基
の集塵機６に送付され、そこで回収された集塵ダスト３
４は配管２０により集合ダストホッパー１８に集めて貯
蔵される。−方、４基の溶剤ホッパー２２にはＣａＦ、
、ＣａＣ２゜ＣａＯ、ソーダ灰等がそれぞれ別個に貯蔵
されている。次に集合ダストホッパー１８の集塵ダスト
３４と溶剤ホッパー２２の溶剤は必要に応じ所期の比率
で切出されて溶剤ミキサー２６で混合される。集塵ダス
ト３４と溶剤との混合は、本発明の最も重要な点であっ
て、この操作によって、微粉の集塵ダスト３４のディス
ペンサー２８における同化や配管の閉塞を防止すること
ができる。上記の効果を挙げるためには溶剤の粒度は１
００メツシュ以上とし、また、集塵ダストに配合する溶
剤の比率はソーダ灰単独の場合は５０％以上、その他の
溶剤の場合は３０％以上とすることにより混合物の固化
を防ぎ配管の閉塞を防止することができる。かくして溶
剤ミキサー２６で十分に混合された集塵ダストと溶剤の
との混合物はディスペンサー２８で加圧され、配管詰り
のトラブルを発生することなくランス１４を介して混銑
車２の溶銑１６に吹込まれ、回収された集塵ダストは溶
剤として再利用される。Next, a method of collecting and utilizing generated dust according to the present invention using the above-mentioned apparatus will be explained. The dust generated by pre-processing the hot metal 16 in the pig iron mixing car 2 is sent to three dust collectors 6 by the dust collection hood 4, fan 5, etc., and the collected dust 3 is collected there.
4 are collected and stored in a collecting dust hopper 18 via a pipe 20. - On the other hand, the four solvent hoppers 22 contain CaF,
, CaC2°CaO, soda ash, etc. are stored separately. Next, the collected dust 34 in the collecting dust hopper 18 and the solvent in the solvent hopper 22 are cut out in a desired ratio as necessary and mixed in a solvent mixer 26. The mixing of the collected dust 34 and the solvent is the most important point of the present invention, and this operation can prevent the fine collected dust 34 from being assimilated in the dispenser 28 and clogging the piping. In order to achieve the above effects, the particle size of the solvent must be 1
00 mesh or more, and the ratio of solvent added to the collected dust is 50% or more when using soda ash alone, and 30% or more when using other solvents to prevent the mixture from solidifying and prevent piping from clogging. can do. In this way, the mixture of collected dust and solvent sufficiently mixed in the solvent mixer 26 is pressurized in the dispenser 28 and is blown into the hot metal 16 of the pig iron mixer 2 through the lance 14 without causing troubles such as clogging of pipes. The collected dust is reused as a solvent.
本発明は溶銑予備処理で発生したダストを複数の集塵機
で回収し、この回収した集塵ダストを１個所で貯蔵し、
あらかじめ貯蔵された別の溶剤と共にミキサーにおいて
十分に混合することにより、同化による配管詰まりのト
ラブルを防止し、次の効果を挙げることができた。The present invention collects dust generated during hot metal pretreatment using a plurality of dust collectors, stores the collected dust in one place,
By thoroughly mixing the solvent with another solvent stored in advance in a mixer, troubles such as piping clogging due to assimilation were prevented and the following effects were achieved.
（イ）集塵ダストを溶銑予備処理の溶剤とじてソーダ灰
等の成分を有効に利用できることは勿論、混合する溶剤
量を加減し最適成分に調整することにより効率のよい予
備処理反応が可能となった。(b) Not only can components such as soda ash be effectively used by combining the collected dust with the solvent for hot metal pretreatment, but also efficient pretreatment reactions can be achieved by adjusting the amount of solvent mixed to the optimum composition. became.
（ロ）集塵ダストを廃棄する作業が不要となった。(b) It is no longer necessary to dispose of collected dust.
第１図（Ａ）、（Ｂ）は本発明実施例の工程図、第２図
は従来の溶銑予備処理発生ダストの回収利用を示す工程
図である。FIGS. 1(A) and 1(B) are process diagrams of an embodiment of the present invention, and FIG. 2 is a process diagram showing the recovery and utilization of dust generated from the conventional hot metal preliminary treatment.
Claims (2)
収し、前記回収した集塵ダストをディスペンサーにて加
圧しランスを介して前記容器の溶銑に吹込む溶銑予備処
理発生ダストの回収利用方法において、前記溶銑予備処
理容器で発生したダストを複数の集塵機で回収しこれら
を１個所に集めて貯蔵する工程と、複数の溶剤を種類別
に貯蔵する工程と、前記の集めて貯蔵した集塵ダストと
種類別に貯蔵した溶剤を混合する工程と、前記の混合し
た溶剤をディスペンサーにて加圧しランスを介して前記
容器の溶銑に吹込む工程と、を有して成ることを特徴と
する溶銑予備処理発生ダストの回収利用方法。(1) In a method for collecting and utilizing dust generated from hot metal pretreatment, in which dust generated in a hot metal pretreatment container is collected by a dust collector, the collected dust is pressurized by a dispenser, and then blown into the hot metal in the container through a lance. , a step of collecting the dust generated in the hot metal pretreatment container using a plurality of dust collectors, collecting and storing the dust in one place, a step of storing a plurality of solvents by type, and a step of collecting and storing the collected dust. Hot metal pretreatment generation characterized by comprising a step of mixing solvents stored according to type, and a step of pressurizing the mixed solvent with a dispenser and blowing it into the hot metal in the container through a lance. How to collect and use dust.
収し、前記の回収した集塵ダストをディスペンサーにて
加圧しランスを介して前記容器の溶銑に吹込む溶銑予備
処理発生ダストの回収利用装置において、複数の集塵機
と、前記複数の集塵機で回収した集塵ダストを集めて貯
蔵する集合ダストホッパーと、複数の種類別の溶剤ホッ
パーと、前記集合ダストホッパーおよび溶剤ホッパーの
原料を混合する溶剤ミキサーと、を有して成ることを特
徴とする溶銑予備処理発生ダストの回収利用装置。(2) A device for collecting and utilizing dust generated from hot metal pretreatment, which collects the dust generated in the hot metal pretreatment container with a dust collector, pressurizes the collected dust with a dispenser, and blows it into the hot metal in the container through a lance. , a plurality of dust collectors, a collective dust hopper that collects and stores collected dust collected by the plurality of dust collectors, a plurality of type-specific solvent hoppers, and a solvent mixer that mixes raw materials for the collective dust hoppers and the solvent hopper. 1. A device for collecting and utilizing dust generated from hot metal pretreatment, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17985588A JPH0230709A (en) | 1988-07-19 | 1988-07-19 | Method and apparatus for recovering and utilizing dust generating in molten iron pre-treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17985588A JPH0230709A (en) | 1988-07-19 | 1988-07-19 | Method and apparatus for recovering and utilizing dust generating in molten iron pre-treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0230709A true JPH0230709A (en) | 1990-02-01 |
Family
ID=16073095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17985588A Pending JPH0230709A (en) | 1988-07-19 | 1988-07-19 | Method and apparatus for recovering and utilizing dust generating in molten iron pre-treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230709A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008184667A (en) * | 2007-01-31 | 2008-08-14 | Jfe Steel Kk | Method for desulfurizing molten pig iron |
-
1988
- 1988-07-19 JP JP17985588A patent/JPH0230709A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008184667A (en) * | 2007-01-31 | 2008-08-14 | Jfe Steel Kk | Method for desulfurizing molten pig iron |
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