JP3259739B2 - Electric furnace discharge treatment method - Google Patents
Electric furnace discharge treatment methodInfo
- Publication number
- JP3259739B2 JP3259739B2 JP33901092A JP33901092A JP3259739B2 JP 3259739 B2 JP3259739 B2 JP 3259739B2 JP 33901092 A JP33901092 A JP 33901092A JP 33901092 A JP33901092 A JP 33901092A JP 3259739 B2 JP3259739 B2 JP 3259739B2
- Authority
- JP
- Japan
- Prior art keywords
- electric furnace
- dust
- slag
- treatment method
- discharge treatment
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 13
- 208000028659 discharge Diseases 0.000 title 1
- 239000002893 slag Substances 0.000 claims description 27
- 239000000428 dust Substances 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002440 industrial waste Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 4
- 238000009628 steelmaking Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 101000993059 Homo sapiens Hereditary hemochromatosis protein Proteins 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気炉排出物であって
産業廃棄物とされている電気炉ダストと、同じく電気炉
排出物であってこれも又産業廃棄物とされている還元ス
ラグとを同時に有効利用するのに好適な電気炉排出物の
処理方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric furnace dust, which is an electric furnace discharge and is regarded as industrial waste, and reduced slag which is also an electric furnace discharge and is also regarded as industrial waste. The present invention relates to a method for treating electric furnace effluent, which is suitable for effectively utilizing both at the same time.
【０００２】[0002]
【従来の技術】鋼材スクラップ等の製鋼原料の溶解に際
しては、電気炉が用いられることが多く、このような電
気炉を用いた製鋼作業においても、炉容量の大型化，高
電力化（ＵＨＰ），水冷ボックスの採用，脱ガス法（Ｄ
Ｈ法，ＲＨ法）や取鍋精錬の併用，直流炉の導入などと
いった幅広い面での改良がなされてきている。2. Description of the Related Art An electric furnace is often used to melt steelmaking raw materials such as steel scrap, and even in steelmaking operations using such an electric furnace, the furnace capacity is increased and the electric power is increased (UHP). , Water cooling box, degassing method (D
(H method, RH method), ladle refining, introduction of DC furnace, etc.
【０００３】このような電気炉を用いた製鋼作業におい
て、大気汚染防止のために直接式や建屋式などの集塵装
置が設置されており、この集塵装置からは電気炉ダスト
が排出される。In a steel making operation using such an electric furnace, a dust collector of a direct type or a building type is installed to prevent air pollution, and dust from the electric furnace is discharged from the dust collector. .
【０００４】また、同じく、このような電気炉を用いた
製鋼作業において、装入された鋼材スクラップ等は、溶
解期，酸化期，除滓，還元期を経て出鋼されるが、この
間において、酸化スラグおよび還元スラグが排出され
る。[0004] Similarly, in a steelmaking operation using such an electric furnace, charged steel scraps and the like are subjected to a melting stage, an oxidation stage, a slag removal stage, and a reduction stage. Oxidized slag and reduced slag are discharged.
【０００５】[0005]
【発明が解決しようとする課題】このような電気炉排出
物のうち、電気炉ダストは、Ｚｎ含有量が多い（例え
ば、１０〜２０重量％）ものの、殆んど再活用されてい
ないのが実情である。Among such electric furnace discharges, electric furnace dust has a high Zn content (for example, 10 to 20% by weight) but is hardly reused. It is a fact.
【０００６】また、この電気炉ダストは、ＦｅＯとして
Ｆｅ含有量が多いものとなっており、このＦｅＯを還元
してＦｅとして回収することが可能ではあるものの、経
済的でないというのが実情である。Further, the electric furnace dust has a high Fe content as FeO, and although it is possible to reduce the FeO and recover it as Fe, the fact is that it is not economical. .
【０００７】一方、酸化スラグは、例えば、アスファル
ト舗装道路の路盤材として再利用されているが、還元ス
ラグは、成分中にＣａＯ含有量が多く、このＣａＯは水
分と反応して、ＣａＯ（生石灰）＋Ｈ２Ｏ（水）→Ｃａ
（ＯＨ）２（消石灰）へと変化することにより体積は約
２倍に膨張するため、この還元スラグをそのまま路盤材
として使用したときには、日数が経るにつれて雨水等と
の反応が進行することにより体積膨張してアスファルト
舗装面を持ち上げてしまうこととなるので好ましくな
い。On the other hand, oxidized slag is reused, for example, as a roadbed material for asphalt-paved roads. However, reduced slag has a large CaO content in its components, and this CaO reacts with moisture to produce CaO (lime). ) + H 2 O (water) → Ca
Since the volume expands about twice by changing to (OH) 2 (slaked lime), when this reduced slag is used as a roadbed material as it is, the reaction with rainwater or the like progresses as the days pass. It is not preferable because it expands and lifts the asphalt pavement surface.
【０００８】したがって、還元スラグを路盤材として使
用する場合には、工場敷地等において長期間にわたって
雨水にさらしたり、貯水池に浸漬させたり、蒸気と接触
させたりするいわゆるエージング処理を行って体積が膨
張したＣａ（ＯＨ）２に変えておく必要があるが、この
ようなエージング作業は長日数を必要としたり、蓄積す
るために広い用地を必要としたりしてあまり好ましいも
のではなかった。Therefore, when the reduced slag is used as a roadbed material, its volume is expanded by performing so-called aging treatment of exposing it to rainwater, immersing it in a reservoir, or bringing it into contact with steam on a factory site or the like for a long time. Although it is necessary to change to Ca (OH) 2 , such an aging work is not very preferable because it requires a long period of time or requires a large site for accumulation.
【０００９】[0009]
【発明の目的】本発明は、上述した従来の課題にかんが
みてなされたものであって、電気炉排出物である電気炉
ダストと、同じく電気炉排出物である還元スラグとを同
時に再利用することが可能である電気炉排出物の処理方
法を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and simultaneously recycles electric furnace dust, which is electric furnace discharge, and reduced slag, which is also electric furnace discharge. It is an object of the present invention to provide a method for treating electric furnace effluents, which is possible.
【００１０】[0010]
【課題を解決するための手段】本発明に係わる電気炉排
出物の処理方法は、電気炉排出物である粉体の電気炉ダ
ストと、同じく電気炉排出物である還元スラグとを重量
比率で、ダストとスラグの比が１：１〜１：２として、
加熱しながら溶融混合して酸化スラグ化する構成とした
ことを特徴としている。SUMMARY OF THE INVENTION According to the present invention, there is provided a method for treating electric furnace effluent, comprising the steps of: mixing a powdery electric furnace dust, which is electric furnace effluent; Assuming that the ratio of dust and slag is 1: 1 to 1: 2,
It is characterized in that it is configured to melt and mix while heating to form an oxidized slag.
【００１１】そして、本発明に係わる電気炉排出物の処
理方法の実施態様においては、電気炉ダストと還元スラ
グとを溶融混合する際に、電気炉ダスト中に含まれてい
て蒸発するＺｎを高Ｚｎダストとして回収してＺｎ原料
とすることができる。[0011] In an embodiment of the method for treating electric furnace effluent according to the present invention, when the electric furnace dust and the reduction slag are melted and mixed, Zn contained in the electric furnace dust and evaporating is reduced. It can be recovered as Zn dust and used as a Zn raw material.
【００１２】[0012]
【発明の作用】本発明に係わる電気炉排出物の処理方法
では、上述した構成としているので、電気炉ダストと還
元スラグとの溶融混合によりＣａＯの少ない、体積膨張
の少ない酸化スラグが得られることとなり、この酸化ス
ラグはエージング処理することなくアスファルト舗装道
路の路盤材として使用しうるものとなることから、電気
炉排出物であって産業廃棄物とされている電気炉ダスト
と、同じく電気炉排出物であってこれも又産業廃棄物と
されている還元スラグの両方共が同時に有効利用されう
ることとなり、また、電気炉ダスト中に含まれているＺ
ｎも高Ｚｎダストとして再回収されることによりＺｎ原
料として有効利用されうることとなる。According to the method for treating electric furnace effluents according to the present invention, since the above-described structure is employed, it is possible to obtain an oxide slag having a small amount of CaO and a small volume expansion by melting and mixing the electric furnace dust and the reduced slag. This oxide slag can be used as a roadbed material for asphalt-paved roads without aging treatment.Therefore, electric furnace dust, which is an electric furnace discharge and industrial waste, and electric furnace discharge Waste, which is also regarded as industrial waste, can be effectively used at the same time, and the Z contained in the electric furnace dust can be effectively used.
Since n is also recovered as high Zn dust, it can be effectively used as a Zn raw material.
【００１３】[0013]
【実施例】電気炉排出物である表１に示す主要成分の電
気炉ダストと、同じく電気炉排出物である表１に示す主
要成分の還元スラグとを１：１，１：２の割合で配合
し、１４００℃に加熱して溶融混合することにより酸化
スラグ化して、表２に示す主要成分の酸化スラグを得
た。また、溶融混合した際に、電気炉ダスト中に含まれ
ていて蒸発したＺｎを高Ｚｎダストとして回収した。EXAMPLE The electric furnace dust of the main component shown in Table 1 which is the discharge of the electric furnace and the reduction slag of the main component shown in Table 1 which is also the discharge of the electric furnace were mixed at a ratio of 1: 1, 1: 2. The resulting mixture was heated to 1400 ° C. and melted and mixed to form an oxidized slag, thereby obtaining an oxidized slag of a main component shown in Table 2. In addition, Zn melted and mixed in the electric furnace dust and evaporated was collected as high Zn dust.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】このようにして得たＣａＯが少なく、体積
膨張の少ない酸化スラグは、そのままないしは従来の還
元スラグよりも軽微なエージング処理によってアスファ
ルト舗装道路の路盤材として使用可能であり、また、高
ＺｎダストはＺｎ原料として再利用できることが確かめ
られた。The oxidized slag obtained as described above, which has a small amount of CaO and a small volume expansion, can be used as a roadbed material for asphalt-paved roads by itself or by a lighter aging treatment than conventional reduced slag. It was confirmed that dust can be reused as a Zn raw material.
【００１７】[0017]
【発明の効果】本発明に係わる電気炉排出物の処理方法
によれば、電気炉排出物である電気炉ダストと、同じく
電気炉排出物である還元スラグとを溶融混合して酸化ス
ラグ化する構成としたから、この酸化スラグはＣａＯが
少なく、体積膨張が少ないことから、例えばアスファル
ト舗装道路の路盤材等として使用することが可能である
ので、産業廃棄物とされている電気炉ダストと、同じく
産業廃棄物とされている還元スラグとを同時に有効利用
することが可能になるという著しく優れた効果がもたら
される。According to the method for treating electric furnace effluent according to the present invention, electric furnace dust, which is electric furnace effluent, and reduced slag, which is also electric furnace effluent, are melt-mixed into oxidized slag. Because of the configuration, this oxide slag has a small amount of CaO and a small volume expansion, so that it can be used, for example, as a roadbed material of an asphalt-paved road, so that electric furnace dust, which is regarded as industrial waste, The remarkably excellent effect that the reduced slag which is also regarded as industrial waste can be effectively used at the same time is obtained.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ２７Ｄ 15/00 Ｆ２７Ｄ 15/00 Ｂ (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 5/00 - 5/06 C22B 7/02 - 7/04 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 7 identification code FI F27D 15/00 F27D 15/00 B (58) Field surveyed (Int.Cl. 7 , DB name) C04B 5/00-5 / 06 C22B 7/02-7/04
Claims (2)
と、同じく電気炉排出物である還元スラグとを重量比率
で、ダストとスラグの比が１：１〜１：２として、加熱
しながら溶融混合して酸化スラグ化することを特徴とす
る電気炉排出物の処理方法。1. A heating method in which a powdery electric furnace dust discharged from an electric furnace and a reduced slag also discharged from an electric furnace are heated at a weight ratio of 1: 1 to 1: 2. A method for treating electric furnace effluent, wherein the mixture is melted and mixed to form oxidized slag.
する際に、電気炉ダスト中に含まれていて蒸発するＺｎ
を高Ｚｎダストとして回収してＺｎ原料とする請求項１
記載の電気炉排出物の処理方法。2. A method of melting and mixing electric furnace dust and reduced slag, wherein Zn contained in the electric furnace dust and evaporates.
2. A high Zn dust is recovered as a Zn raw material.
A method for treating electric furnace effluent as described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33901092A JP3259739B2 (en) | 1992-12-18 | 1992-12-18 | Electric furnace discharge treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33901092A JP3259739B2 (en) | 1992-12-18 | 1992-12-18 | Electric furnace discharge treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06183794A JPH06183794A (en) | 1994-07-05 |
| JP3259739B2 true JP3259739B2 (en) | 2002-02-25 |
Family
ID=18323422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33901092A Expired - Fee Related JP3259739B2 (en) | 1992-12-18 | 1992-12-18 | Electric furnace discharge treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3259739B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8072008B2 (en) | 2005-06-14 | 2011-12-06 | Mitsumi Electric Co., Ltd. | Biosensor having ultra fine fiber |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69520259T2 (en) * | 1994-12-08 | 2001-08-09 | Daido Steel Co Ltd | Process and furnace for the disposal of steel mill waste and operating methods for this furnace |
| LU90509B1 (en) | 2000-01-21 | 2001-07-23 | Wurth Paul Sa | Electric steel mill slag treatment process |
| KR102217174B1 (en) * | 2019-02-26 | 2021-02-18 | 주식회사 에코마이스터 | Extra rapid curing mortar composition containing rapid cooled reduced steelmaking slag powder and electric arc furnace dust |
-
1992
- 1992-12-18 JP JP33901092A patent/JP3259739B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8072008B2 (en) | 2005-06-14 | 2011-12-06 | Mitsumi Electric Co., Ltd. | Biosensor having ultra fine fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06183794A (en) | 1994-07-05 |
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