JPH0996413A - Fuel gas supply control method of ironworks - Google Patents
Fuel gas supply control method of ironworksInfo
- Publication number
- JPH0996413A JPH0996413A JP7255037A JP25503795A JPH0996413A JP H0996413 A JPH0996413 A JP H0996413A JP 7255037 A JP7255037 A JP 7255037A JP 25503795 A JP25503795 A JP 25503795A JP H0996413 A JPH0996413 A JP H0996413A
- Authority
- JP
- Japan
- Prior art keywords
- cog
- demand
- supply
- amount
- fuel gas
- 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.)
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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
- Y02P10/25—Process efficiency
Landscapes
- Feeding And Controlling Fuel (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明方法は、製鉄所の燃料
ガス供給制御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 fuel gas supply control method for an iron mill.
【０００２】[0002]
【従来の技術】製鉄所において、製鉄工程で発生するガ
スとしてはコークス炉発生ガス（以下ＣＯＧという）、
高炉ガス（以下ＢＦＧという）及び転炉ガス（以下ＬＤ
Ｇという）があり、これらのガスは副生ガスとして回収
し燃料ガスとして製鉄工程の加熱炉等々及び発電用ボイ
ラーへ供給し、エネルギーとして利用している。このよ
うな燃料ガスの供給制御方法としては、製鉄の生産計画
に基づく長期エネルギー運用計画と、運用実績に応じた
短期エネルギー運用計画に基づき購入電力量及び購入ガ
ス量が最小になるごとく、副生ガスを回収するガスホル
ダーのレベル推移（貯蔵量）及び自家発電設備の発電量
をそれぞれ決定して、制御することが特公平５−２２１
５７号公報に開示されている。2. Description of the Related Art In a steelworks, a gas generated in an ironmaking process is a coke oven gas (hereinafter referred to as COG),
Blast furnace gas (hereinafter referred to as BFG) and converter gas (hereinafter referred to as LD)
G)), and these gases are collected as by-product gases and supplied as fuel gas to heating furnaces and the like in the iron making process and boilers for power generation, and used as energy. Such a fuel gas supply control method is based on a long-term energy operation plan based on the steelmaking production plan and a short-term energy operation plan based on the operation results, so It is desirable to determine and control the level transition (storage amount) of the gas holder that collects gas and the power generation amount of the private power generation facility, respectively.
No. 57 is disclosed.
【０００３】[0003]
【発明が解決しようとする課題】上記のごとき燃料ガス
の発熱量はＢＦＧ約760Kcal/m3N 、ＣＯＧ約4000Kcal/m
3N 、ＬＤＧ約2000Kcal/m3NとＣＯＧの発熱量が最も高
く、かつ発生量も大量である。このようなことからＣＯ
Ｇは、大量に燃料ガスを必要とするコークス炉、熱風
炉、連続熱間圧延（熱延）工程の加熱炉等に主として供
給し、またコークス炉及び熱風炉へ供給するＣＯＧへＬ
ＤＧを混入することもある。一方発電用のボイラーへの
燃料ガス供給は、ＣＯＧの回収が余剰基調のときは供給
するが基本的にはＢＦＧとＬＤＧの混合ガスを供給す
る。The calorific value of the fuel gas as described above is about 760 Kcal / m 3 N for BFG and 4000 Kcal / m for COG.
3 N, the highest heating value of LDG about 2000 kcal / m 3 N and COG, and the generation amount is also large quantities. Because of this, CO
G is mainly supplied to a coke oven that requires a large amount of fuel gas, a hot blast stove, a heating oven for a continuous hot rolling (hot rolling) process, and the like.
DG may be mixed in. On the other hand, fuel gas is supplied to the power generation boiler when COG recovery is in an excessive tone, but basically a mixed gas of BFG and LDG is supplied.
【０００４】このような燃料ガス供給においては、特に
最大需要工程でのフル稼動による需要増大、一部コーク
ス炉の定期修理等でＣＯＧが不足することがある。また
転炉の稼動率の低下によるＬＤＧ回収量の低減により、
ＣＯＧ供給が増大する等々によってＣＯＧの需給バラン
スがくずれることがある。このようなときには、例えば
ＢＦＧとＬＰＧ（プロパンガス、発熱量２８５００Kcal
/ m3N ）の合成ガスを主として大需要工程である熱風
炉、加熱炉等へ供給するＣＯＧへ混入してＣＯＧの発熱
量を増加し、その発熱量増加分のＣＯＧ供給量を減少す
ることによって、全体のガスバランス維持しつつエネル
ギーの需給管理を行うものである。In such fuel gas supply, COG may become insufficient due to increased demand due to full operation particularly in the maximum demand process and periodic repair of some coke ovens. Also, by reducing the LDG recovery amount due to a decrease in the operating rate of the converter,
The COG supply / demand balance may be disrupted due to an increase in COG supply and the like. In such a case, for example, BFG and LPG (propane gas, calorific value 28500 Kcal
/ m 3 N) of synthetic gas is mixed with COG that is mainly supplied to high demand processes such as hot blast stoves and heating furnaces to increase the calorific value of COG and reduce the COG supply amount corresponding to the increased calorific value. It manages energy supply and demand while maintaining the overall gas balance.
【０００５】しかして上記のごとく、合成ガスを製鉄工
程へ供給中のＣＯＧへ混入すべきか否かの判断は、回収
したＣＯＧホルダーのレベル（ＣＯＧ貯蔵レベル）の変
動によって、オペレターが判断しているのが実情であ
る。従って、オペレターによる合成ガスのＣＯＧへの混
入タイミングに個人差があり、また合成ガス混入の必要
がないのに混入することもある。このようなことからＬ
ＰＧ等の購入ガス量が増加し、エネルギーコストを著し
く上昇させる等の課題がある。本発明方法は、このよう
な課題を有利に解決するためなされたものであり、ＣＯ
Ｇ等の需要量に基づき、合成ガスのＣＯＧへの混入タイ
ミングを決定し、必要時に正確に合成ガスを混入する製
鉄所の燃料ガス供給制御方法を提供することを目的とす
るものである。However, as described above, the operator decides whether or not the synthesis gas should be mixed with the COG being supplied to the steelmaking process, based on the fluctuation of the level of the collected COG holder (COG storage level). Is the reality. Therefore, there are individual differences in the timing of mixing the synthetic gas into the COG due to the operator, and there is a case where the synthetic gas may be mixed into the COG when it is not necessary. Because of this, L
There are problems such as an increase in the amount of purchased gas such as PG and a significant increase in energy cost. The method of the present invention has been made in order to advantageously solve such a problem.
An object of the present invention is to provide a fuel gas supply control method for a steel mill, which determines the mixing timing of the syngas into the COG based on the demand amount of G and the like and accurately mixes the syngas when necessary.
【０００６】[0006]
【課題を解決するための手段】本発明方法の特徴とする
ところは、ＣＯＧ、ＬＤＧ及びＢＦＧを製鉄工程及び発
電用ボイラーへ供給して操業するに際し、ＣＯＧ需要量
とＬＤＧ需要量から製鉄工程へ供給中のＣＯＧへの合成
ガス供給タイミングを決定して供給し、発熱量を増加せ
しめるとともに、代替えガスとして供給してＣＯＧ供給
量を低減し、ＣＯＧホルダーレベルを需要供給調整範囲
内に制御することを特徴とする製鉄所の燃料ガス供給制
御方法である。A feature of the method of the present invention is that COG, LDG and BFG are supplied from a COG demand amount and an LDG demand amount to a steelmaking process when the COG, LDG and BFG are supplied to a steelmaking process and a power generation boiler for operation. Determine and supply the syngas supply timing to the COG that is being supplied to increase the calorific value, and supply it as an alternative gas to reduce the COG supply amount and control the COG holder level within the supply and demand adjustment range. Is a fuel gas supply control method for an iron mill.
【０００７】[0007]
【発明の実施の形態】本発明方法の一例を図面により説
明する。図１において、コークス炉１から発生したＣＯ
ＧをＣＯＧホルダー２へ回収するとともに、ＣＯＧの一
部にＬＤＧとＢＦＧの混合ガスをコークス炉１の石炭乾
留（コークス製造）用の燃料ガスとして供給し、ＣＯＧ
ホルダー２へ回収したＣＯＧは、余剰基調のときに発電
用ボイラー３へ供給するが、通常はＢＦＧとＬＤＧの混
合ガスを別系統から供給する。またＣＯＧは熱風炉４へ
ＬＤＧを混入した混合ガスを供給し、更にＣＯＧを熱延
加熱炉５、厚板加熱炉６及びその他工場７の熱処理炉等
へ供給する。ＣＯＧの需給バランスがくずれたときは、
制御器８（計算器）で例えば、製鉄工程である熱延加熱
炉５と厚板加熱炉６の稼動基数、熱風炉４の稼動状況及
びその他工場７の熱処理炉等の稼動状況から例えば最大
需要工程のＣＯＧとＬＤＧの需要量を予測し、ＣＯＧホ
ルダー２のＣＯＧ貯蔵量（ホルダーレベル）変動に対し
て、合成ガスを混入するか否かを判断する。即ち、ＣＯ
Ｇの供給をこのまま続行すれば、ＣＯＧホルダー２の運
用下限レベルを割り込むおそれがあると判断したとき
は、合成ガス供給設備９へ合成ガスの供給をオペレータ
ーまたは自動的に指示して、製鉄工程へ供給中のＣＯＧ
へ合成ガスを供給しＣＯＧとの混合ガスとして、ＣＯＧ
の発熱量を増加せしめて熱風炉４、熱延加熱炉５、厚板
加熱炉６及びその他工場７へ供給することによって、Ｃ
ＯＧの発熱量増加分に相当するＣＯＧ供給量を低減して
ＣＯＧホルダー２のレベル（ＣＯＧ貯蔵量）の運用範囲
（需給調整範囲）に調整するものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS One example of the method of the present invention will be described with reference to the drawings. In FIG. 1, CO generated from the coke oven 1
G is collected in the COG holder 2, and a mixed gas of LDG and BFG is supplied as a fuel gas for coal carbonization (coke production) in the coke oven 1 to a part of the COG, thereby
The COG collected in the holder 2 is supplied to the power generation boiler 3 when there is an excess tone, but normally a mixed gas of BFG and LDG is supplied from another system. Further, COG supplies a mixed gas containing LDG to the hot-air stove 4, and further supplies COG to the hot rolling heating furnace 5, the plate heating furnace 6 and the heat treatment furnaces of other factories 7. When the supply-demand balance of COG collapses,
In the controller 8 (calculator), for example, the maximum demand from the operating number of the hot-rolling heating furnace 5 and the plate heating furnace 6 in the iron making process, the operating status of the hot blast stove 4, and the operating status of the heat treatment furnace of the other factory 7, etc. The demands of COG and LDG in the process are predicted, and it is determined whether or not the synthesis gas is mixed in with respect to the COG storage amount (holder level) fluctuation of the COG holder 2. That is, CO
If it is determined that the operation lower limit level of the COG holder 2 may be interrupted if the G supply is continued as it is, an operator or automatically instructs the synthesis gas supply facility 9 to supply the synthesis gas to the steelmaking process. COG being supplied
COG is supplied as a mixed gas with COG
C by increasing the calorific value of C to supply to the hot-blast stove 4, hot-rolling heating furnace 5, thick plate heating furnace 6 and other factories 7.
The COG supply amount corresponding to the increase in the heat generation amount of the OG is reduced and adjusted to the operating range (supply / demand adjustment range) of the level of the COG holder 2 (COG storage amount).
【０００８】このように制御器８において、ＣＯＧとＬ
ＤＧの需要量から合成ガスのＣＯＧへの供給タイミング
を決定するには、計算器による制御で確実にできるが、
一層正確にタイミングを決定するには、ファジィ制御
（理論）が有利であり、かつメンバーシップ関数を用い
ることが有効である。Thus, in the controller 8, COG and L
In order to determine the supply timing of the syngas to the COG from the demand amount of the DG, it can be surely controlled by a computer,
To determine the timing more accurately, fuzzy control (theory) is advantageous, and it is effective to use the membership function.
【０００９】次に前記のごとき、ＣＯＧの大需要工程で
ある熱延加熱炉のＣＯＧ需要量予測算出の具体例を挙げ
る。 ＣＯＧ需要量＝Ａ×Ｔ１＋Ｂ×Ｔ１×Ｄ2 ＋Ｃ×Ｔ２×
Ｄ3 ＋Ｄ×Ｚ１＋Ｅ Ｔ１：均熱帯Ｔ／Ｈｒ、Ｔ２：加熱帯Ｔ／Ｈｒ Ｄ2 ：加熱帯昇温量（鋼片抽出温度−鋼片装入温度） Ｄ3 ：予熱帯昇温量（鋼片抽出温度−鋼片装入温度） Ｚ１：均熱帯 Ａ、Ｂ、Ｃ、Ｄ、Ｅ：各予測因子の係数で加熱炉稼動率
によりテーブル化Next, a concrete example of the COG demand forecast calculation of the hot rolling furnace, which is a large COG demand process as described above, will be given. COG demand = A × T1 + B × T1 × D 2 + C × T2 ×
D 3 + D × Z1 + E T1: soaking zone T / Hr, T2: heating zone T / Hr D 2: heating ObiNoboru Yutakaryou (slab extraction temperature - billet loading temperature) D 3: preheating ObiNoboru Yutakaryou (Steel Piece extraction temperature-steel piece charging temperature) Z1: Soaking zone A, B, C, D, E: Table of heating factor operating rates with coefficients of each predictive factor
【００１０】また厚板加熱炉のＣＯＧ需要量予測算出例
としては、 ＣＯＧ需要量＝Ａ×ＴＯＮ＋Ｂ×ＱＳ＋Ｂ×ＱＳ＋Ｃ×
ＱＨ＋Ｅ ＴＯＮ：鋼片抽出Ｔ／１０分 ＱＳ：均熱帯における鋼片抽出温度−鋼片装入温度×Ｔ
ＯＮ ＱＨ：加熱帯における鋼片抽出温度−鋼片装入温度×Ｔ
ＯＮ Ａ、Ｂ、Ｃ、Ｅ：各予測因子の係数 鋼片装入温度：熱片４００℃、冷片２０℃の固定値Further, as an example of COG demand prediction calculation of a thick plate heating furnace, COG demand = A × TON + B × QS + B × QS + C ×
QH + E TON: Slab extraction T / 10 minutes QS: Slab extraction temperature in soaking zone-Strip charging temperature x T
ON QH: Steel piece extraction temperature in heating zone-steel piece charging temperature x T
ON A, B, C, E: Coefficient of each predictive factor Steel billet charging temperature: Fixed value of hot strip 400 ° C, cold strip 20 ° C
【００１１】次に、合成ガスを製鉄工程へ供給中のＣＯ
Ｇへ供給することによって、ＣＯＧ供給量が低減するこ
とからＣＯＧホルダーの回収ＣＯＧが増加することによ
る合成ガス混入（供給）からｔ時間後までのホルダーレ
ベルの変化値の算出例を挙げる。 合成ガス供給後の時間 Ｘ ホルダーレベルの変化 Ｙ ０≦ｔ≦０．５のとき Ｙ＝∫0 t （６０ｘ＋２０＋ａ−４５）ｄｘ ０．５≦ｔ Ｙ＝∫0 0.5（６０ｘ＋２０−３５）ｄｘ＋∫0.5 t （５
０＋ａ−４５）ｄｘ このようにしてホルダーレベルの最大落ち込み量Ｙmin
を計算する。但し計算誤差を考慮してＹmin は５０００
ｍ3 Ｎ単位で切り上げる。（安全サイドの基準とする） 運用上のホルダーレベル＝｜最大落ち込み量Ｙmin ｜＋
設備保安上の下限レベルこのようにして、合成ガスの供
給タイミングを決定してＣＯＧホルダーレベルの需要調
整範囲を逸脱すないようにする。Next, the CO that is supplying the synthesis gas to the ironmaking process.
An example of calculating the change value of the holder level from the time (t) after the mixing (supply) of the synthesis gas due to the increase of the COG recovery COG of the COG holder due to the decrease of the COG supply amount by supplying to G will be given. Time after syngas supply X Change in holder level Y 0 ≤ t ≤ 0.5 Y = ∫ 0 t (60x + 20 + a-45) dx 0.5 ≤ t Y = ∫ 0 0.5 (60x + 20-35) dx + ∫ 0.5 t (5
0 + a-45) dx In this way, the maximum amount of holder level drop Ymin
Is calculated. However, Ymin is 5000 considering the calculation error.
Round up in units of m 3 N. (The standard for safety side) Operational holder level = | Maximum drop amount Ymin | +
Lower limit level of facility security In this way, the supply timing of synthesis gas is determined so as not to deviate from the COG holder level demand adjustment range.
【００１２】[0012]
【実施例】次に、本発明方法の実施例を挙げる。 １）燃料ガス ＣＯＧ平均発生量：１３万ｍ3 Ｎ／Ｈｒ ＬＤＧ平均発生量： ６万ｍ3 Ｎ／Ｈｒ ＢＦＧ平均発生量：１１０万ｍ3 Ｎ／Ｈｒ 合成ガス：ＬＰＧ：ＢＦＧ＝１：２ 合成ガスのＣＯＧへの供給量：７５００ｍ3 Ｎ／Ｈｒ ２）ＣＯＧホルダー ホルダー容量：１０万ｍ3 ホルダーのＣＯＧ需要調整範囲（量）５万ｍ3 ３）ＣＯＧ需要量 コークス炉：平均２．３万ｍ3 Ｎ／Ｈｒ（ＬＤＧ平均
１．８万ｍ3 Ｎ／Ｈｒ） 熱風炉：平均１．６万ｍ3 Ｎ／Ｈｒ（ＬＤＧ平均２．４
万ｍ3 Ｎ／Ｈｒ） 熱延加熱炉：平均２．５万ｍ3 Ｎ／Ｈｒ（基数４基） 厚板加熱炉：平均０．３万ｍ3 Ｎ／Ｈｒ（基数１基） その他工場：平均８．６万ｍ3 Ｎ／ＨｒNext, examples of the method of the present invention will be described. 1) Fuel gas COG average generation amount: 130,000 m 3 N / Hr LDG average generation amount: 60,000 m 3 N / Hr BFG average generation amount: 1.1 million m 3 N / Hr Synthesis gas: LPG: BFG = 1: 2 Supply of syngas to COG: 7500 m 3 N / Hr 2) COG holder Capacity of holder: 100,000 m 3 COG demand adjustment range (amount) 50,000 m 3 3) COG demand Coke oven: 2.3 on average 10,000 m 3 N / Hr (LDG average 18,000 m 3 N / Hr) Hot stove: Average 16,000 m 3 N / Hr (LDG average 2.4
10,000 m 3 N / Hr) Hot rolling furnace: Average 25,000 m 3 N / Hr (4 units) Thick plate furnace: Average 330,000 m 3 N / Hr (1 unit) Other plants: Average 86,000 m 3 N / Hr
【００１３】このような燃料ガスの需給において、次記
のごとくファジィ制御によりＣＯＧの最大需要工程であ
る熱延加熱炉のＣＯＧ需要量、ＬＤＧ需要量から供給中
のＣＯＧへの合成ガス供給タイミングをメンバーシップ
関数で表し、２５個の規則にまとめ制御した。In such supply and demand of fuel gas, fuzzy control is used to determine the COG demand amount of the hot rolling furnace, which is the maximum demand process of COG, and the syngas supply timing from the LDG demand amount to the COG being supplied. It is represented by a membership function and is controlled by 25 rules.
【表１】 [Table 1]
【００１４】上記のごとき、メンバーシップ関数表によ
り制御したところ、製鉄工程へ供給中のＣＯＧへの合成
ガスの供給タイミングが正確にとれ、ＣＯＧホルダーの
レベルも常時需要調整範囲に確実に調整でき、しかもオ
ペレーターの合成ガス供給タイミングの判断に比べ合成
ガス使用量を約 ％低減することができた。When controlled by the membership function table as described above, the timing of supplying the syngas to the COG being supplied to the steelmaking process can be accurately taken, and the level of the COG holder can be reliably adjusted to the demand adjustment range at all times. Moreover, compared to the operator's judgment of the timing of supplying the syngas, the amount of syngas used could be reduced by about%.
【００１５】[0015]
【発明の効果】本発明方法によれば、ＣＯＧホルダーの
レベルを常時正確に需要調整範囲に調整することがで
き、ホルダーの機能（バックアップ機能等）を十分に発
揮することができる。また合成ガスの使用量を低減する
ことができ、燃料ガスのコストを低下することができる
等の優れた効果が得られる。According to the method of the present invention, the level of the COG holder can always be accurately adjusted to the demand adjustment range, and the holder function (backup function, etc.) can be sufficiently exerted. Further, it is possible to reduce the amount of the syngas used, and it is possible to obtain the excellent effects such as the cost of the fuel gas.
【図１】本発明方法の一例を示すフロー図である。FIG. 1 is a flow chart showing an example of a method of the present invention.
─────────────────────────────────────────────────────
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【手続補正書】[Procedure amendment]
【提出日】平成７年１０月２０日[Submission date] October 20, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１４[Correction target item name] 0014
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１４】上記のごとき、メンバーシップ関数表によ
り制御したところ、製鉄工程へ供給中のＣＯＧへの合成
ガスの供給タイミングが正確にとれ、ＣＯＧホルダーの
レベルも常時需要調整範囲に確実に調整でき、しかもオ
ペレーターの合成ガス供給タイミングの判断に比べ合成
ガス使用量を約２５％低減することができた。When controlled by the membership function table as described above, the timing of supplying the syngas to the COG being supplied to the steelmaking process can be accurately taken, and the level of the COG holder can be reliably adjusted to the demand adjustment range at all times. Moreover, the amount of syngas used could be reduced by about 25 % compared to the operator's judgment of the syngas supply timing.
Claims (2)
び発電用ボイラーへ供給して操業するに際し、ＣＯＧ需
要量とＬＤＧ需要量から製鉄工程へ供給中のＣＯＧへの
合成ガス供給タイミングを決定して供給し、発熱量を増
加せしめてＣＯＧ供給量を減少し、ＣＯＧホルダーレベ
ルを需要供給調整範囲内に制御することを特徴とする製
鉄所の燃料ガス供給制御方法。1. When supplying COG, LDG and BFG to a steelmaking process and a power generation boiler for operation, the timing of synthesis gas supply to the COG being supplied to the steelmaking process is determined from the COG demand and the LDG demand. A fuel gas supply control method for a steel mill, which comprises supplying the COG supply amount to increase the heat generation amount to reduce the COG supply amount and controlling the COG holder level within a supply / demand adjustment range.
いて製鉄工程へ供給中のＣＯＧへの合成ガス供給タイミ
ングを決定することを特徴とする請求項１に記載の製鉄
所の燃料ガス供給制御方法。2. The fuel gas supply control method for a steel mill according to claim 1, wherein the fuzzy control membership function is used to determine the timing of supplying the syngas to the COG being supplied to the steelmaking process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7255037A JPH0996413A (en) | 1995-10-02 | 1995-10-02 | Fuel gas supply control method of ironworks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7255037A JPH0996413A (en) | 1995-10-02 | 1995-10-02 | Fuel gas supply control method of ironworks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0996413A true JPH0996413A (en) | 1997-04-08 |
Family
ID=17273299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7255037A Withdrawn JPH0996413A (en) | 1995-10-02 | 1995-10-02 | Fuel gas supply control method of ironworks |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0996413A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011085291A (en) * | 2009-10-14 | 2011-04-28 | Ihi Corp | Device and method for supplying gas |
-
1995
- 1995-10-02 JP JP7255037A patent/JPH0996413A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011085291A (en) * | 2009-10-14 | 2011-04-28 | Ihi Corp | Device and method for supplying gas |
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