JP3155153B2 - Operating method of vertical scrap melting furnace - Google Patents
Operating method of vertical scrap melting furnaceInfo
- Publication number
- JP3155153B2 JP3155153B2 JP15331694A JP15331694A JP3155153B2 JP 3155153 B2 JP3155153 B2 JP 3155153B2 JP 15331694 A JP15331694 A JP 15331694A JP 15331694 A JP15331694 A JP 15331694A JP 3155153 B2 JP3155153 B2 JP 3155153B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- furnace
- substance
- melting furnace
- scrap melting
- 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
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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
- Y02P10/20—Recycling
Description
【０００１】[0001]
【産業上の利用分野】この発明は、竪型スクラップ溶解
炉の操業方法に係わり、より詳しくはスクラップ溶解に
用いる炭素含有物質（以下炭材と称す）の炉内装入に際
し、該炭素含有物質がシャフト部でソリューションロス
反応を起こさずに炉下部まで到達し、炉下部で完全にコ
ークス、石炭等の炭材のエネルギーを使い切り、該スク
ラップ溶解操業における炭材原単位を減少させるキュポ
ラ等の竪型スクラップ溶解炉の操業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 a method for operating a vertical scrap melting furnace, and more particularly, to a method for melting a carbon-containing material (hereinafter referred to as "carbon material") used for scrap melting into a furnace. A vertical type such as a cupola that reaches the lower part of the furnace without causing a solution loss reaction at the shaft part, completely uses up the energy of the carbonaceous material such as coke and coal in the lower part of the furnace, and reduces the basic unit of carbonaceous material in the scrap melting operation The present invention relates to a method for operating a scrap melting furnace.
【０００２】[0002]
【従来の技術】そもそもキュポラに代表される竪型のス
クラップ溶解炉とは比較的簡単な構造の筒型炉で、装入
した鉄源は常にコークス（炭材）と接触しながら降下
し、炉下部に配設された羽口から送られる空気中の酸素
とコークス中の炭素との燃焼反応熱で予熱・溶解され
る。2. Description of the Related Art In the first place, a vertical scrap melting furnace represented by cupola is a cylindrical furnace having a relatively simple structure, and a charged iron source always descends while being in contact with coke (carbonaceous material). It is preheated and melted by the heat of combustion reaction between oxygen in the air and carbon in the coke sent from the tuyere provided in the lower part.
【０００３】例えば、従来のキュポラ操業では、エネル
ギー効率を上げコークス原単位を減少させる方法として
熱風操業、酸素富化操業、あるいは以下に詳述する高効
率炉（ＦＡＲ："Forno de Alto-Rendimento"の略で高効
率炉の意味）での操業が行われている。熱風操業とは送
風温度を上げるために、外部に熱交換器を設置する操業
法であり、酸素富化操業とは、外部に酸素富化装置を設
置して、羽口からの送風空気の酸素濃度を上げる操業法
であり、ＦＡＲとは図２に示すように竪型シャフト部炉
頂９から鉄源１だけを装入し、炭材であるコークス２は
２次羽口１０ａ、１０ｂの下に設置した別のコークス装
入箇所１１から装入し、ソリューションロス反応を起こ
さずに行う方法（石野亨著「キュポラ」６０−４−１
０，新日本鋳鍛造協会、Ｐ．９７参照）である。なお、
図２で１２は１次羽口、１３は溶融鉄の取り出し口、１
４はスラグの排出口である。For example, in the conventional cupola operation, hot air operation, oxygen enrichment operation, or a high-efficiency furnace (FAR: "Forno de Alto-Rendimento") described below is used as a method of increasing energy efficiency and reducing coke intensity. Stands for high efficiency furnace). Hot air operation is an operation method in which a heat exchanger is installed externally to raise the blast temperature.Oxygen-enrichment operation is an operation in which an oxygen As shown in FIG. 2, FAR is an operation method for increasing the concentration, in which only the iron source 1 is charged from the furnace shaft top 9 of the vertical shaft portion, and the coke 2 as the carbonaceous material is provided below the secondary tuyeres 10a and 10b. By charging the coke from another coke charging point 11 installed in the system without causing a solution loss reaction (Toru Ishino, Cupola, 60-4-1)
0, New Japan Cast Forging Association, P. 97). In addition,
In FIG. 2, 12 is the primary tuyere, 13 is the outlet for molten iron, 1
4 is a slag discharge port.
【０００４】しかしながら、熱風送風によるスクラップ
溶解炉の操業方法では、該送風を加熱する熱源としてキ
ュポラ排ガスの持ち去る熱量を利用するために種々の熱
交換器、あるいは別の燃料で送風を予熱するための外熱
式予熱装置を設置しなければならず、設備が多大になる
という問題があった。また、熱交換器自体の熱伝達効率
の制約により、排ガス顕熱の形で系外に捨てられる熱エ
ネルギーも多く、また低カロリー潜熱の有効利用も困難
であった。[0004] However, in the operation method of the scrap melting furnace using hot air blast, in order to utilize the calorie removed by the cupola exhaust gas as a heat source for heating the blast, it is necessary to preheat the blast with various heat exchangers or another fuel. There is a problem that the external heating type preheating device must be installed, and the equipment becomes large. In addition, due to the heat transfer efficiency of the heat exchanger itself, much heat energy was discarded outside the system in the form of sensible heat of exhaust gas, and it was difficult to effectively use low-calorie latent heat.
【０００５】酸素富化によるスクラップ溶解炉の操業方
法では、酸素を吹き込む方法として、（１）送風管の中
で酸素を富化させる、（２）羽口にインジェクションパ
イプを挿入して純酸素を吹き込む、（３）羽口と別に設
けた水冷インジェクションパイプを用い圧縮空気で純酸
素を吹き込む、の３種類があるが、（２）、（３）は酸
素を直接炉内に吹き込むので効果は顕著だが調整が難し
く、また設備も複雑になる。[0005] In a method of operating a scrap melting furnace by oxygen enrichment, as a method of blowing oxygen, (1) oxygen is enriched in a blower tube, and (2) pure oxygen is inserted by inserting an injection pipe into a tuyere. There are three types: (3) blowing pure oxygen with compressed air using a water-cooled injection pipe provided separately from the tuyere. (2) and (3) have a remarkable effect because oxygen is blown directly into the furnace. However, it is difficult to adjust and the equipment becomes complicated.
【０００６】（１）の送風管の途中で酸素を吹き込み、
送風空気中の酸素濃度を高くする方法は、吹き込まれた
酸素がキュポラ内に入る前に薄められ、均一になるので
調整が容易であるが、いづれの方法も酸素製造設備及び
供給設備等の大規模な設備が必要となる問題があった。
更に酸素ガスを使用するため溶解コストが上昇するとい
う欠点もあった。[0006] Oxygen is blown in the middle of the blower tube of (1),
The method of increasing the oxygen concentration in the blown air is easy to adjust because the blown oxygen is diluted before entering the cupola and becomes uniform, but both methods are large, such as oxygen production equipment and supply equipment. There was a problem that a large-scale facility was required.
Further, the use of oxygen gas has the disadvantage of increasing the melting cost.
【０００７】ＦＡＲの操業では、竪型シャフト部におけ
る充填物はスクラップのみで炭材が存在しないことか
ら、高温ガスによる加熱を受けて、スクラップの融着に
より棚吊り現象が生じ易くなり操業が安定しない問題点
があった。[0007] In the operation of FAR, the filling in the vertical shaft portion is made of only scrap and no carbonaceous material. Therefore, it is heated by the high-temperature gas, and the fusing of the scrap easily causes a shelf hanging phenomenon, so that the operation is stable. There was no problem.
【０００８】[0008]
【発明が解決しようとする課題】この発明は、上記の問
題点を解決し、竪型スクラップ溶解炉の操業において、
多大の設備を用いることなく、炭材のエネルギーを最大
限有効に使い切り、スクラップ溶解に必要な炭材原単位
を大幅に低減することができ、かつ棚吊り等のトラブル
が生じない竪型スクラップ溶解炉の操業方法を提供する
ことを目的とするものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a method for operating a vertical scrap melting furnace.
Vertical scrap melting that effectively uses up the energy of the carbon material without using a large amount of equipment, greatly reduces the basic unit of carbon material required for melting the scrap, and does not cause problems such as hanging on the shelf It is intended to provide a method of operating a furnace.
【０００９】[0009]
【課題を解決するための手段】この発明は、第１の発明
は、炉頂から固体鉄源と炭素含有物質を同時あるいは個
別に投入すると共に、炉下部に配設された羽口から空気
を吹き込んで前記炭素含有物質を燃焼させその反応熱に
より前記固体鉄源を予熱・溶解する竪型スクラップ溶解
炉の操業方法において、前記固体鉄源と同時にあるいは
個別に投入する炭素含有物質の表面を、高温のＣＯ2 や
Ｈ2 Ｏによって酸化されにくくかつ該竪型スクラップ溶
解炉の下部においては燃焼、蒸発、溶融等により消失す
る物質により被覆することにより、炉中・上部でのソリ
ューションロス反応を低下させたことを特徴とする竪型
スクラップ溶解炉の操業方法であり、第２の発明は、上
記の炭素含有物質の表面を被覆する物質がアルカリ金属
またはアルカリ土類金属の酸化物、炭酸化物、水酸化
物、硫化物のいずれか１種以上あるいはこれらを含む鉱
物からなることを特徴とする竪型スクラップ溶解炉の操
業方法であり、第３の発明は、上記の炭素含有物質の表
面を被覆する物質の塗布方法として、その物質の粉粒体
を液状媒体を用いてスラリー化した後に該炭素含有物質
の表面に該スラリーを散布して塗布するか、あるいは該
スラリー中に該炭素含有物質を浸漬させることにより該
炭素含有物質の表面に塗布することを特徴とする竪型ス
クラップ溶解炉の操業方法である。According to a first aspect of the present invention, a solid iron source and a carbon-containing substance are simultaneously or individually supplied from a furnace top.
Air is charged separately, and air is introduced from the tuyere
To combust the carbon-containing substance to generate heat of reaction.
In the operation method of the vertical scrap melting furnace for preheating and melting the solid iron source, the surface of the carbon-containing substance which is simultaneously or separately charged with the solid iron source is hardly oxidized by high-temperature CO 2 or H 2 O. In addition, the lower part of the vertical scrap melting furnace is covered with a substance that disappears due to combustion, evaporation, melting, etc. , so that the warp in the furnace and in the upper part is covered.
A method for operating a vertical scrap melting furnace characterized in that the surface loss of the carbon-containing material is reduced by an alkali metal or alkaline earth metal oxide. , A carbonate, a hydroxide, or a sulfide, or a mineral containing the same, and a method for operating a vertical scrap melting furnace. As a method of applying a substance that coats the surface of the material, a slurry of the particulate material of the substance is slurried using a liquid medium and then the slurry is sprayed and applied to the surface of the carbon-containing substance, or the slurry is added to the slurry. This is a method for operating a vertical scrap melting furnace, characterized in that a carbon-containing substance is immersed and applied to the surface of the carbon-containing substance.
【００１０】[0010]
【作用】一般のキュポラに代表される竪型スクラップ溶
解炉の操業では、炉下部に配設された羽口から送られる
空気で炉内に装入された炭材（コークス等）の燃焼反
応、 Ｃ＋Ｏ2 ＝ＣＯ2 ……………………（１） が起こり、大量の発熱が生じ、スクラップ等の鉄源を溶
解する。[Operation] In the operation of a vertical scrap melting furnace typified by a general cupola, the combustion reaction of carbon material (coke, etc.) charged into the furnace by air sent from tuyeres arranged at the lower part of the furnace, C + O 2 = CO 2 (1) occurs, a large amount of heat is generated, and the iron source such as scrap is dissolved.
【００１１】しかし、この燃焼反応（発熱反応）の際に
発生したＣＯ2 の一部は炉内を上昇するにつれて、鉄源
（スクラップ等）、炭材（コークス等）を予熱すると共
に炭材（コークス等）と ＣＯ2 ＋Ｃ＝２ＣＯ ……………………（２） ソリューションロス反応（吸熱反応）を起こす。However, as the CO 2 generated during the combustion reaction (exothermic reaction) rises in the furnace, it preheats the iron source (scrap, etc.) and the carbonaceous material (coke, etc.), (Coke, etc.) and CO 2 + C = 2CO (2) Solution loss reaction (endothermic reaction) occurs.
【００１２】これらの反応・伝熱により、炉全体の熱効
率としては炉外に排出されるガス中のＣＯ分だけの潜熱
と炉外に排出されるガスが持って出る顕熱が炉外に捨て
られることになる。この発明によれば、コークス、石炭
等の炭材の表面をアルカリ金属の炭酸化物であるＮａＣ
Ｏ3 等あるいはアルカリ土類金属の酸化物であるＣａＯ
等で被覆しているので、炉中・上部でのＣＯ2 と炭材と
のソリューションロス反応を低下させることができ、炉
内でほぼ完全に炭材のエネルギーを使い切ることを可能
にし、コークス原単位を減少でき、エネルギー効率向上
ができるようになる。すなわち、この発明においては、
炉外に排出されるガスはＣＯ2 が大部分であり、炉外放
出の潜熱は少なく、また炉外に排出されるガスの持つ顕
熱が低いので炉頂排ガス温度を低くできる。As a result of these reactions and heat transfer, the thermal efficiency of the entire furnace is such that the latent heat of only the amount of CO in the gas discharged outside the furnace and the sensible heat generated by the gas discharged outside the furnace are discarded outside the furnace. Will be done. According to the present invention, the surface of a carbonaceous material such as coke and coal is coated with NaC which is an alkali metal carbonate.
CaO which is an oxide of O 3 etc. or alkaline earth metal
So that the solution loss reaction between CO 2 and the carbon material in the furnace and in the upper part can be reduced, making it possible to almost completely use the energy of the carbon material in the furnace. Units can be reduced and energy efficiency can be improved. That is, in the present invention,
Most of the gas discharged outside the furnace is CO 2 , the latent heat of discharge outside the furnace is small, and the sensible heat of the gas discharged outside the furnace is low, so that the furnace top exhaust gas temperature can be lowered.
【００１３】この発明で用いる表面被覆材としては、石
灰石（ＣａＣＯ3 が主成分、以下同様）、生石灰（Ｃａ
Ｏ）、消石灰（Ｃａ（ＯＨ）2 ）、石膏（ＣａＳ
Ｏ4 ）、ドロマイト（ＭｇＣＯ3 ，ＣａＣＯ3 ）、焼成
ドロマイト（ＭｇＯ，ＣａＯ）、ソーダ灰（Ｎａ2 ＣＯ
3 ）、炭酸バリウム、硫酸バリウム等が挙げられる。但
し、これらの選択条件として、炉壁を構成する耐火物や
鋼製構造物（原材料装入部の金物等）を溶損、腐食しな
いことが挙げられる。The surface coating material used in the present invention includes limestone (main component of which is CaCO 3 ) and quick lime (Ca
O), slaked lime (Ca (OH) 2 ), gypsum (CaS
O 4 ), dolomite (MgCO 3 , CaCO 3 ), calcined dolomite (MgO, CaO), soda ash (Na 2 CO 3 )
3 ), barium carbonate, barium sulfate and the like. However, these selection conditions include that the refractory and the steel structure (metals and the like in the raw material charging section) constituting the furnace wall are not damaged or corroded.
【００１４】また、通常のキュポラ操業では造滓補助材
として石灰石を添加するので、本発明の場合にも、この
働きと同様の働きをする材料が望ましい。一方、被覆方
法としては、単純に粉状の表面被覆材を炭材に「まぶ
す」ことでもよいが、被覆の効果を考えると粉状材料を
水、油、有機溶剤等の液状媒体によりスラリーとし、こ
れを散布して塗布するか、スラリー状の浴の中に浸漬す
るかのいずれかの方法で塗布するのが望ましい。Further, in the normal cupola operation, limestone is added as a slag-making auxiliary material. Therefore, in the case of the present invention, a material having the same function as this function is desirable. On the other hand, the coating method may be to simply “spray” the powdery surface coating material on the carbon material.However, considering the effect of coating, the powdery material is converted into a slurry using a liquid medium such as water, oil, or an organic solvent. It is preferable to apply the composition by spraying or immersing it in a slurry bath.
【００１５】[0015]
【実施例】図１に示す炉内径６００ｍｍ、炉高約６７０
０ｍｍのキュポラを用いて操業した。ベルトコンベヤ６
で運ばれた原料は炉頂９に設置された原料投入装置５に
より炉内に投入される。風箱４から羽口３により空気が
吹き込まれコークス２を燃焼し、スクラップ１を加熱溶
融し、排ガス７は排ガスダクト１５を経て排出される。
なお、１６は希釈空気８の取り入れ用のダンパである。FIG. 1 shows a furnace inner diameter of 600 mm and a furnace height of about 670.
The operation was performed using a 0 mm cupola. Belt conveyor 6
Is transported into the furnace by the raw material loading device 5 installed on the furnace top 9. Air is blown from the wind box 4 by the tuyere 3 to burn the coke 2, heat and melt the scrap 1, and the exhaust gas 7 is discharged through the exhaust gas duct 15.
Reference numeral 16 denotes a damper for taking in the dilution air 8.
【００１６】従来法のキュポラ操業において、コークス
比１４０ｋｇ／ｔ、送風量２４００Ｎｍ3 ／ｈｒ、溶解
速度２．１ｔ／ｈｒ、装入生石灰量１８ｋｇ／ｈｒの条
件下では、温度１５２０℃、〔Ｃ〕＝３．２％の溶銑が
得られた。なお、この場合スクラップと炭材を原料投入
装置５から各々層状となるようにして炉内に投入した。In the conventional cupola operation, under the conditions of a coke ratio of 140 kg / t, a blowing rate of 2400 Nm 3 / hr, a dissolution rate of 2.1 t / hr, and a charged lime amount of 18 kg / hr, a temperature of 1520 ° C. and [C] = 3.2% of hot metal was obtained. In this case, the scrap and the carbon material were charged into the furnace from the raw material charging device 5 so as to be layered.
【００１７】この発明の実施例でも、送風量２４００Ｎ
ｍ3 ／ｈｒ、溶解速度２．１ｔ／ｈｒの同一条件で操業
した。水１００ｇに対して生石灰粉を２５０ｇの割合で
生石灰粉を混練機を用いて混合し、作製した溶液をコー
クスの表面に塗布した炭材を用い、この塗布した生石灰
を含めた全体の装入生石灰量は従来と同量の１８ｋｇ／
ｈｒで行った。なお、この場合スクラップと生石灰を塗
布した炭材を原料投入装置５から同時に炉内に投入し
た。Also in the embodiment of the present invention, the blowing amount is 2400 N
The operation was carried out under the same conditions of m 3 / hr and a dissolution rate of 2.1 t / hr. Quick lime powder was mixed with 250 g of quick lime powder with respect to 100 g of water using a kneader, and the prepared solution was applied to the surface of coke using a carbonaceous material. The amount is 18 kg /
hr. In this case, the carbon material coated with scrap and quicklime was simultaneously charged into the furnace from the raw material charging device 5.
【００１８】従来法のキュポラ操業では約１５％のＣＯ
が系外に排出されるが、この発明方法により表面を生石
灰にて塗布した炭材を用いることにより、ソリューショ
ンロス反応（ＣＯ2 ＋Ｃ＝２ＣＯ）が抑制され、系外に
出る排ガス中のＣＯ濃度が５％以下に低下した。また棚
吊り等のトラブルは発生しなかった。排ガス中ＣＯ濃度
低下による潜熱排出低下分はコークス１ｋｇ当たり約１
３．６ＭＪであるので、鉄源１ｔ当たり１９０．４ＭＪ
／ｔの潜熱分が減少でき、コークス比が１４０ｋｇ／ｔ
から１２６ｋｇ／ｔ以下に削減可能となった。In the conventional cupola operation, about 15% of CO
Although but is discharged out of the system, by using a carbonaceous material coated with a surface at quicklime by the invention method, solubles Sho <br/> Nrosu reaction (CO 2 + C = 2CO) is suppressed, out of the system The CO concentration in the discharged exhaust gas dropped to 5% or less. Also, no troubles such as hanging on the shelves occurred. The decrease in latent heat emission due to the decrease in CO concentration in exhaust gas is about 1 per kg of coke.
Because it is 3.6 MJ, 190.4 MJ per ton of iron source
/ T latent heat component can be reduced and the coke ratio is 140 kg / t
, It can be reduced to 126 kg / t or less.
【００１９】[0019]
【発明の効果】この発明は、コークス、石炭等の炭材の
表面を被覆することにより、炉中・上部でソリューショ
ンロス反応を起こさず、エネルギー効率向上、コークス
原単位減少を可能にした。また酸素富化等の従来技術と
比較して設備費も削減された。According to the present invention, by coating the surface of a carbonaceous material such as coke and coal, a solution loss reaction does not occur in and in the furnace, thereby improving energy efficiency and reducing the unit consumption of coke. Also, equipment costs have been reduced compared to conventional technologies such as oxygen enrichment.
【図１】この発明で用いる竪型スクラップ溶解炉の一例
を示すキュポラの断面図である。FIG. 1 is a sectional view of a cupola showing an example of a vertical scrap melting furnace used in the present invention.
【図２】高効率炉（ＦＡＲ）の概念断面図である。FIG. 2 is a conceptual sectional view of a high efficiency furnace (FAR).
１ 鉄源 ２ コークス（炭材） ３ 羽口 ４ 風箱 ５ 原材料投入装置 ６ ベルトコンベヤ ７ 排ガス ８ 希釈空気 ９ 炉頂 １０ａ ２次羽口 １０ｂ ２次羽口 １１ コークス装入箇所 １２ １次羽口 １３ 溶融鉄の取り出し口 １４ スラグの排出口 １５ 排ガスダクト １６ ダンパ DESCRIPTION OF SYMBOLS 1 Iron source 2 Coke (charcoal material) 3 Tuyere 4 Wind box 5 Raw material charging device 6 Belt conveyor 7 Exhaust gas 8 Dilution air 9 Furnace top 10a Secondary tuyere 10b Secondary tuyere 11 Coke loading point 12 Primary tuyere 13 Molten iron outlet 14 Slag outlet 15 Exhaust gas duct 16 Damper
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−67050（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C21B 13/02 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-67050 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C21B 13/02
Claims (3)
あるいは個別に投入すると共に、炉下部に配設された羽
口から空気を吹き込んで前記炭素含有物質を燃焼させそ
の反応熱により前記固体鉄源を予熱・溶解する竪型スク
ラップ溶解炉の操業方法において、前記固体鉄源と同時
にあるいは個別に投入する炭素含有物質の表面を、高温
のＣＯ2 やＨ2 Ｏによって酸化されにくくかつ該竪型ス
クラップ溶解炉の下部においては燃焼、蒸発、溶融等に
より消失する物質により被覆することにより、炉中・上
部でのソリューションロス反応を低下させたことを特徴
とする竪型スクラップ溶解炉の操業方法。1. Simultaneous supply of a solid iron source and a carbon-containing substance from the furnace top
Alternatively, feed them individually and install the blades
Air is blown from the mouth to burn the carbon-containing material,
In the operation method of the vertical scrap melting furnace for preheating and melting the solid iron source by the reaction heat of, the surface of the carbon-containing substance charged simultaneously or individually with the solid iron source is heated with high-temperature CO 2 or H 2 O. combustion in the lower portion of the oxidized difficult and該竪type scrap melting furnace, evaporation, by coating with a substance which disappears by melting or the like, furnace-top
The method for operating a vertical scrap melting furnace, characterized in that the solution loss reaction in the section is reduced .
ルカリ金属またはアルカリ土類金属の酸化物、炭酸化
物、水酸化物、硫化物のいずれか１種以上あるいはこれ
らを含む鉱物からなることを特徴とする請求項１記載の
竪型スクラップ溶解炉の操業方法。2. The method according to claim 1, wherein the substance covering the surface of the carbon-containing substance comprises at least one of oxides, carbonates, hydroxides and sulfides of alkali metals or alkaline earth metals, or a mineral containing these. The method for operating a vertical scrap melting furnace according to claim 1.
布方法として、その物質の粉粒体を液状媒体を用いてス
ラリー化した後に該炭素含有物質の表面に該スラリーを
散布して塗布するか、あるいは該スラリー中に該炭素含
有物質を浸漬させることにより該炭素含有物質の表面に
塗布することを特徴とする請求項１又は２記載の竪型ス
クラップ溶解炉の操業方法。3. A method for applying a substance that coats the surface of a carbon-containing substance, wherein a powder of the substance is slurried using a liquid medium, and then the slurry is sprayed and applied to the surface of the carbon-containing substance. The method for operating a vertical scrap melting furnace according to claim 1 or 2, wherein the carbon-containing material is applied to the surface of the carbon-containing material by immersing the carbon-containing material in the slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15331694A JP3155153B2 (en) | 1994-07-05 | 1994-07-05 | Operating method of vertical scrap melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15331694A JP3155153B2 (en) | 1994-07-05 | 1994-07-05 | Operating method of vertical scrap melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0813015A JPH0813015A (en) | 1996-01-16 |
| JP3155153B2 true JP3155153B2 (en) | 2001-04-09 |
Family
ID=15559833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15331694A Expired - Fee Related JP3155153B2 (en) | 1994-07-05 | 1994-07-05 | Operating method of vertical scrap melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3155153B2 (en) |
-
1994
- 1994-07-05 JP JP15331694A patent/JP3155153B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0813015A (en) | 1996-01-16 |
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