JPS6393815A - Combustion improving method in melting furnace operation - Google Patents
Combustion improving method in melting furnace operationInfo
- Publication number
- JPS6393815A JPS6393815A JP61238107A JP23810786A JPS6393815A JP S6393815 A JPS6393815 A JP S6393815A JP 61238107 A JP61238107 A JP 61238107A JP 23810786 A JP23810786 A JP 23810786A JP S6393815 A JPS6393815 A JP S6393815A
- Authority
- JP
- Japan
- Prior art keywords
- melting
- source
- melting furnace
- raw material
- auxiliary combustion
- 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
- 238000002844 melting Methods 0.000 title claims abstract description 37
- 230000008018 melting Effects 0.000 title claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 10
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000009841 combustion method Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 239000003245 coal Substances 0.000 abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Natural products O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002090 carbon oxide Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001737 promoting 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
- Y02P10/20—Recycling
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
この発明は、電気炉等の溶解炉において、スクラップ等
の溶解原料を効率よく溶解するのに利用される溶解炉操
業における助燃方法に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a melting furnace operation that is used to efficiently melt melting raw materials such as scrap in a melting furnace such as an electric furnace. This relates to auxiliary combustion methods.
（従来の技術）
従来、電気炉等の溶解炉内でスクラップ等の溶解原料を
溶解するに際し、電力消費量を低減するとともに操業サ
イクルを短縮するために、溶解作業において微粉状ない
しは微粒状のＣ源と０２源を供給し、２Ｃ＋０□→２Ｃ
Ｏへの燃焼に伴なう発熱で溶解原料の加熱溶解を促進す
る助燃技術が採用されることがあった（例えば、特開昭
５５−８９４１４号）。(Prior art) Conventionally, when melting raw materials such as scrap in a melting furnace such as an electric furnace, in order to reduce power consumption and shorten the operating cycle, fine powder or particulate C was used during the melting process. Supply source and 02 source, 2C+0□→2C
A auxiliary combustion technique has been employed in which heating and melting of the molten raw material is promoted by the heat generated by combustion to O (for example, Japanese Patent Application Laid-open No. 89414/1983).
（発明が解決しようとする問題点）
このような従来の助燃技術においては、供給する微粉状
ないしは微粒状のＣ源と０２源との上記発熱反応によっ
て、溶解原料の加熱溶解をかなり促進することができ、
電力消費量の低減ならびに操業サイクルの短縮を実現す
ることが可能であるが、上記電力消費量の低減ならびに
操業サイクルの短縮への要望は依然として根強いものが
あった。(Problems to be Solved by the Invention) In such conventional auxiliary combustion technology, heating and melting of the molten raw material can be considerably promoted by the exothermic reaction between the supplied fine powder or particulate C source and the 02 source. is possible,
Although it is possible to reduce power consumption and shorten the operating cycle, there is still a strong desire to reduce power consumption and shorten the operating cycle.
（発明の目的）
この発明は、上述した要望に鑑みてなされたもので、操
業コストの大幅な上昇をもたらすことなく、溶解炉内で
の溶解原料の加熱溶解に際して、電力消費量のより一層
の低減ならびに操業サイクルのより一層の短縮を実現す
ることが可能である溶解炉操業における助燃方法を提供
することを目的としているものである。(Purpose of the Invention) This invention was made in view of the above-mentioned demands, and can further reduce power consumption when heating and melting raw materials in a melting furnace without causing a significant increase in operating costs. The object of the present invention is to provide a method for auxiliary combustion in melting furnace operation that can reduce the amount of fuel used and further shorten the operating cycle.
「発明の構成」
（問題点を解決するための手段）
この発明による溶解炉操業における助燃方法は、溶解炉
内でスクラップ等の溶解原料を加熱して溶解するに際し
、Ｃ（炭素）源と０２ （酸素）源を供給して助燃す
るにあたり、当該助燃時に発生するＣ０（−酸化炭素）
量に対しＣ０２（二酸化炭素）変換に必要な当量以上の
０２ （酸素）を吹込むようにしたことを特徴として
いる。"Structure of the Invention" (Means for Solving Problems) The auxiliary combustion method in the operation of a melting furnace according to the present invention is a method for auxiliary combustion in a melting furnace operation in which a C (carbon) source and 02 When auxiliary combustion is performed by supplying a (oxygen) source, CO (-carbon oxide) generated during the auxiliary combustion
It is characterized in that 02 (oxygen) is blown in an amount equal to or more than the equivalent amount required for CO2 (carbon dioxide) conversion.
この発明による溶解炉操業における助燃方法において、
供給されるＣ（炭素）源としては、微粉状の石炭や微粒
状（噴霧状）の重油、灯油などが使用されるが、とくに
限定されない、また、Ｃ２（酸素）源においても１００
％酸素に限定されず、酸素富化空気なども使用でき、酸
素と空気とを別々に供給する場合も当然台まれる。In the auxiliary combustion method in melting furnace operation according to the present invention,
As the C (carbon) source to be supplied, fine coal, fine particulate (sprayed) heavy oil, kerosene, etc. are used, but are not particularly limited.
It is not limited to % oxygen, but oxygen-enriched air can also be used, and of course it is also possible to supply oxygen and air separately.
そして、助燃時においてスクラップ等の溶解原料の酸化
により発生するＧｏ（−酸化炭素）量に対しＣ０２（二
酸化炭素）変換に必要な当量以上の０２ （酸素）を
吹込むに際しても、１００％０２に限定されない、この
場合、Ｃ２を吹込むにあたっては、溶解原料に対する助
燃効率の悪い位置で実施することが望ましく、また、Ｃ
Ｏの流れ方向に対し反対の方向からいわゆるカウンター
ブロー（ＣＢ）方式として０２を吹込むようになすこと
が望ましい、そして、いずれにしても、０２の吹込みは
、助燃時に発生するＣＯ量に対し、Ｃｏ２変換に必要な
当量以上とし、ＣＯ＋ １／２ｏ２→Ｃｏ、の発熱反応
による溶解促進効果が十分に得られるようにする。Furthermore, even when injecting more than the equivalent amount of 02 (oxygen) required for CO2 (carbon dioxide) conversion to the amount of Go (-carbon oxide) generated by oxidation of melted raw materials such as scrap during auxiliary combustion, it is possible to achieve 100% 02. However, in this case, it is desirable to inject C2 at a position where the auxiliary combustion efficiency for the melted raw material is poor.
It is desirable to inject 02 from the opposite direction to the flow direction of O as a so-called counter blow (CB) method. The amount should be at least the equivalent required for conversion, so that the effect of promoting dissolution due to the exothermic reaction of CO+ 1/2o2→Co can be sufficiently obtained.
この発明における上記０２の吹込みは、溶解原料の未溶
解、溶解途中および／または溶解後（たとえば、溶解原
料の追装時）のいずれにおいても実施することが可能で
あり、適宜選定して実施することが望ましい。In this invention, the above-mentioned blowing in 02 can be carried out when the melted raw material is not yet melted, during melting, and/or after melting (for example, when adding the melted raw material), and can be carried out by selecting the method as appropriate. It is desirable to do so.
（実施例）
アーク式電気炉内において炭素鋼の溶解を行うに際し、
第１表に示す要領でスクラップ原料の溶解を行なった。(Example) When melting carbon steel in an electric arc furnace,
The scrap raw material was melted as shown in Table 1.
なお、第１図は操業例３における操業パターンを示すも
のである。Note that FIG. 1 shows the operation pattern in Operation Example 3.
１−ノ パ
′、１・１，１
、′−・二″−７
すなわち、第１表における操業例１は、助燃技術を採用
しない従来の溶解法の場合を示すものであり、このとき
の電力原単位を基準（１００）とした。1-nopa', 1・1,1, ′-・2''-7 In other words, operation example 1 in Table 1 shows the case of the conventional melting method that does not employ combustion auxiliary technology. The electric power consumption rate was used as the standard (100).
次に、操業例２は、この発明の一実施例を示すもので、
溶解炉内にＣ源として微粉炭と０２源として１０％０２
空気とを供給して助燃し、この助燃時に発生するＣＯ量
に対しＣＯ２変換に必要な当量以上の０２を吹込んだ（
ただし、カウンターブローなし）場合を示すものであり
、この時の電力原単位は操業例１のｌＯＯに対して約９
０〜８０程度にまで低下させることができた。Next, Operation Example 2 shows one embodiment of this invention.
Pulverized coal as a C source and 10% 02 as an 02 source in the melting furnace
Air was supplied to auxiliary combustion, and 02 was blown in an amount equivalent to or more than the amount required for CO2 conversion for the amount of CO generated during this auxiliary combustion (
However, this shows the case (without counter blow), and the electricity consumption rate in this case is approximately 9
It was possible to lower it to about 0-80.
さらに、操業例３は、この発明の他の実施例を示すもの
で、第１図に示すように、溶解炉内にＣ源として微粉炭
と０２源として２０％０２空気とを供給して助燃し、こ
の助燃時に発生するＣＯ量に対しＣ０２変換に必要な当
量以上の０２を前記ＣＯの流れ方向と反対方向に供給す
るカウンターブロ一方式で吹込んだ場合を示すものであ
り、この時の電力原単位は操業例１の１００に対して約
８０〜７０程度まで低下させることができ、大幅な省電
力を実現することができた。Furthermore, Operation Example 3 shows another embodiment of the present invention, in which pulverized coal as a C source and 20% 02 air as an 02 source are supplied into the melting furnace to assist combustion. However, this shows the case where 02 equivalent to or more than the amount required for CO2 conversion is blown into the amount of CO generated during auxiliary combustion using a counter blower method that supplies in the opposite direction to the flow direction of the CO. The power consumption rate could be reduced to about 80 to 70 compared to 100 in Operation Example 1, and significant power savings could be achieved.
［発明の効果］
以上説明してきたように、この発明によれば、溶解炉内
で溶解原料を加熱して溶解するに際し、Ｃ源と０２源を
供給して助燃するにあたり、当該助燃時に発生するＣＯ
量に対しＣ０２変換に必要な当量以上の０２を吹込むよ
うにしたから、電気炉等の溶解炉内でスクラップ等の溶
解原料を溶解するに際して、省電力による電力原単位の
より一層の低減ならびに操業サイクルのより一層の短縮
を実現することが可能であるという非常に優れた効果が
もたらされる。[Effects of the Invention] As explained above, according to the present invention, when heating and melting the melting raw material in the melting furnace, when the C source and the 02 source are supplied for auxiliary combustion, the combustion that occurs during the auxiliary combustion. C.O.
By injecting more than the equivalent amount of 02 required for CO2 conversion, when melting raw materials such as scrap in a melting furnace such as an electric furnace, it is possible to further reduce the power consumption rate and reduce the operating cycle due to power saving. This brings about a very good effect in that it is possible to realize a further reduction in the length of time.
第１図はこの発明による溶解炉操業の一実施例を示す説
明図である。FIG. 1 is an explanatory diagram showing an embodiment of melting furnace operation according to the present invention.
Claims (3)
Ｃ源とＯ＿２源を供給して助燃するにあたり、当該助燃
時に発生するＣＯ量に対しＣＯ＿２変換に必要な当量以
上のＯ＿２を吹込むことを特徴とする溶解炉操業におけ
る助燃方法。(1) When heating and melting raw materials in a melting furnace,
A method for auxiliary combustion in a melting furnace operation, characterized in that when auxiliary combustion is performed by supplying a C source and an O_2 source, O_2 in an amount equivalent to or more than that required for CO_2 conversion is injected with respect to the amount of CO generated during the auxiliary combustion.
悪い位置で実施することを特徴とする特許請求の範囲第
（１）項記載の溶解炉操業における助燃方法。(2) The method for auxiliary combustion in a melting furnace operation according to claim (1), wherein the injection of O_2 is carried out at a position where the auxiliary combustion efficiency for the melted raw material is poor.
方向から実施することを特徴とする特許請求の範囲第（
１）項または第（２）項記載の溶解炉操業における助燃
方法。(3) The blowing of O_2 is carried out from a direction opposite to the flow direction of CO.
The auxiliary combustion method in the operation of a melting furnace as described in item 1) or item (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238107A JPS6393815A (en) | 1986-10-08 | 1986-10-08 | Combustion improving method in melting furnace operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238107A JPS6393815A (en) | 1986-10-08 | 1986-10-08 | Combustion improving method in melting furnace operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6393815A true JPS6393815A (en) | 1988-04-25 |
Family
ID=17025280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61238107A Pending JPS6393815A (en) | 1986-10-08 | 1986-10-08 | Combustion improving method in melting furnace operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6393815A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995009336A1 (en) * | 1993-09-30 | 1995-04-06 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Electric arc fusion furnace |
-
1986
- 1986-10-08 JP JP61238107A patent/JPS6393815A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995009336A1 (en) * | 1993-09-30 | 1995-04-06 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Electric arc fusion furnace |
| AU668821B2 (en) * | 1993-09-30 | 1996-05-16 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Electric arc fusion furnace |
| AU679653B2 (en) * | 1993-09-30 | 1997-07-03 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Electric arc melting furnance |
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