JPS635451B2 - - Google Patents
Info
- Publication number
- JPS635451B2 JPS635451B2 JP8979582A JP8979582A JPS635451B2 JP S635451 B2 JPS635451 B2 JP S635451B2 JP 8979582 A JP8979582 A JP 8979582A JP 8979582 A JP8979582 A JP 8979582A JP S635451 B2 JPS635451 B2 JP S635451B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- molten steel
- smelting furnace
- water
- steel
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229910001868 water Inorganic materials 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 claims description 2
- 229910017082 Fe-Si Inorganic materials 0.000 claims 2
- 229910017133 Fe—Si Inorganic materials 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/567—Manufacture of steel by other methods operating in a continuous way
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
【発明の詳細な説明】
本発明は、連続製鋼時の溶鋼温度を適確に制御
する手段を備えた連続製鋼設備に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to continuous steel manufacturing equipment equipped with means for accurately controlling the temperature of molten steel during continuous steel manufacturing.
連続製鋼法とは、何らかの手段（例えば、高
炉）で作られた溶銑（溶融した銑鉄）を、第１図
のフローシートに示すように、溶銑供給装置１に
て精錬炉２へ連続的に供給し、該精錬炉２内に酸
素をランス３から吹精し、溶銑中の炭素を低減し
て鋼とし、連続的に次工程へ供給する方法であ
る。 The continuous steel manufacturing method is a method in which hot metal (molten pig iron) made by some means (for example, a blast furnace) is continuously supplied to a smelting furnace 2 by a hot metal supply device 1, as shown in the flow sheet of Fig. 1. This is a method in which oxygen is blown into the refining furnace 2 from a lance 3 to reduce carbon in the molten metal to produce steel, which is then continuously supplied to the next process.
実際の精錬では、炭素の外に、溶銑中の硅素、
燐、硫黄、マンガン、鉄も酸化される。また、脱
硫、脱燐のためにフラツクス（添加剤）を供給す
ること、スラグの塩基度を調整するために石灰を
供給すること等も一般に行われている。 In actual refining, in addition to carbon, silicon in hot metal,
Phosphorus, sulfur, manganese, and iron are also oxidized. It is also common practice to supply flux (additive) for desulfurization and dephosphorization, and to supply lime to adjust the basicity of slag.
上記の精錬時に発生するCO，CO2等のガスは
排ガスダクト４から排出される。また、精錬炉２
から出た鋼は、必要に応じて成分調整され（成分
調整手段は図示せず）、タンデイツシユ５に注湯
され、連続鋳造機のモールド６に注がれ、鋳片７
として連続的に生産される。 Gases such as CO and CO 2 generated during the above-mentioned refining are discharged from the exhaust gas duct 4. In addition, smelting furnace 2
The steel discharged from the mold is subjected to composition adjustment as necessary (composition adjustment means is not shown), poured into a tundish 5, poured into a mold 6 of a continuous casting machine, and cast into a slab 7.
is produced continuously.
以上の連続精鋼法においては、成分、温度、流
量の制御が重要であり、特に温度の制御について
は次のことが問題となる。 In the above-described continuous steel processing method, control of components, temperature, and flow rate is important, and the following issues arise particularly with respect to temperature control.
すなわち、耐火材の寿命からタンデイツシユ５
を交換する必要があり、交換直後は高温の溶鋼を
供給しなければならないこと、また溶銑の成分の
変動、酸素吹精と精錬反応との乱れ等により溶鋼
の温度が高くなり過ぎる場合があること、であ
る。 In other words, from the lifespan of the refractory material, the tandate 5
Immediately after replacement, it is necessary to supply high-temperature molten steel, and the temperature of molten steel may become too high due to fluctuations in the composition of the molten metal, disturbances between the oxygen blowing spirit and the refining reaction, etc. , is.
従来は、これらの温度制御の問題に対して有効
な対策がなく、間に合せ的にタンデイツシユ５に
冷却材を投入したり（例えば、鋼の小片((個が５
〜10Kg程度のもの))投入し、該小片が溶湯の熱を
奪つて溶解することにより、溶湯の温度が下が
る）、フエロシリコン（Fe―Si）を精錬炉２に投
入して発熱源とする等の手段がとられていた。 Conventionally, there have been no effective countermeasures to these temperature control problems, such as adding coolant to the tundish 5 (for example, using small pieces of steel ((5 pieces)).
~10Kg))), and the small pieces absorb the heat of the molten metal and melt, thereby lowering the temperature of the molten metal), and ferrosilicon (Fe-Si) is introduced into the refining furnace 2 to act as a heat source. Measures were taken to do so.
本発明は、以上の諸点に鑑みて、温度制御を適
確に行う手段を備えた連続製鋼設備を提供するも
のである。 In view of the above points, the present invention provides continuous steel manufacturing equipment equipped with means for accurately controlling temperature.
すなわち本発明は、精錬炉から連続的に出てく
る溶鋼の温度を検出する装置と、該溶鋼温度を上
昇させる手段として精錬炉へFe―Siを供給する
装置と、逆に該溶鋼の温度を下降させる手段とし
て精錬炉へ水を供給する装置と、上記のFe―Si
又は水の供給量を制御する装置とからなる溶鋼の
温度制御手段を備えた連続製鋼設備に関するもの
である。 That is, the present invention provides a device for detecting the temperature of molten steel continuously coming out of a smelting furnace, a device for supplying Fe-Si to the smelting furnace as a means for increasing the temperature of the molten steel, and a device for detecting the temperature of the molten steel. A device that supplies water to the smelting furnace as a means of lowering the Fe-Si
The present invention also relates to continuous steelmaking equipment equipped with a molten steel temperature control means comprising a device for controlling the amount of water supplied.
以下、添付図面を参照して本発明を詳細に説明
する。 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
第２図は本発明に係る連続製鋼設備の一実施態
様例を説明するための系統図である。 FIG. 2 is a system diagram for explaining an embodiment of continuous steel manufacturing equipment according to the present invention.
第２図において、第１図と同一符号は第１図と
同一機能部品を示し、８はタンデイツシユ５内の
溶鋼温度を検出する温度計、９はその温度をもと
にして指示値を送る制御装置、１０は酸素供給
源、１１は水供給源、１２はFe―Si供給装置で
ある。酸素供給系統には流量計１３、流量調節弁
１４および添加装置１５があり、水供給系統には
流量計１６、流量調節弁１７および添加装置１５
（該添加装置１５は酸素添加と共通）がある。上
記の流量調節弁１４，１７の弁の開度は、流量計
１３，１６の指示値と制御装置９から指示された
流量との差をもとに、制御装置９から指示された
流量を維持するように、それぞれ調節器１８，１
９により制御される。 In FIG. 2, the same reference numerals as in FIG. 1 indicate the same functional parts as in FIG. In the apparatus, 10 is an oxygen supply source, 11 is a water supply source, and 12 is a Fe--Si supply device. The oxygen supply system includes a flow meter 13, a flow rate control valve 14, and an addition device 15, and the water supply system includes a flow meter 16, a flow rate control valve 17, and an addition device 15.
(The addition device 15 is common to oxygen addition). The valve opening degrees of the flow control valves 14 and 17 are determined based on the difference between the indicated values of the flowmeters 13 and 16 and the flow rate instructed by the control device 9, and maintain the flow rate instructed by the control device 9. the regulators 18, 1, respectively, so that
9.
第３図は温度制御のための操作要領の一例を示
す図である。 FIG. 3 is a diagram showing an example of an operating procedure for temperature control.
第３図において、溶鋼の温度が設定温度T0を
含んで許容範囲α内にあれば、水給供も、Fe―
Si供給も必要ではない。 In Fig. 3, if the temperature of molten steel is within the allowable range α including the set temperature T 0 , the water supply is also
Si supply is also not required.
しかし、溶銑の流量、成分の変動、精錬反応の
乱れ等により、第２図に示す温度計８により検出
される溶鋼温度が、第３図の許容範囲αの外側に
なつたときは、第３図に従つて、第２図に示す制
御装置９から指令が出される。すなわち、溶鋼温
度が許容範囲αを越えて高過ぎる場合は、制御装
置９から調節器１９へ指令が出され、水供給が開
始される。逆に溶鋼温度が低温になり過ぎた場合
は、制御装置９から調節器１８およびFe―Si供
給装置１２へ指令が出され、酸素とFe―Siが供
給される。このFe―Siの場合、それに見合う酸
素をランス３から吹精する必要があるため、調節
器１８へも指令を出し、酸素吹精量を調整する必
要があるのである。 However, if the molten steel temperature detected by the thermometer 8 shown in FIG. 2 falls outside the tolerance range α shown in FIG. According to the diagram, commands are issued from the control device 9 shown in FIG. That is, if the molten steel temperature is too high beyond the allowable range α, a command is issued from the control device 9 to the regulator 19, and water supply is started. Conversely, if the molten steel temperature becomes too low, a command is issued from the control device 9 to the regulator 18 and the Fe--Si supply device 12, and oxygen and Fe--Si are supplied. In the case of Fe--Si, it is necessary to blow an appropriate amount of oxygen from the lance 3, so it is necessary to send a command to the regulator 18 to adjust the amount of oxygen blowing.
また、タンデイツシユ５の交換時等において、
特に設定温度T0を変更した場合も、自動的に制
御装置９から指令が出され、上記と同様の操作が
行われる。 Also, when replacing the tundish 5, etc.,
In particular, even when the set temperature T 0 is changed, a command is automatically issued from the control device 9 and the same operation as described above is performed.
なお、水供給の場合、蒸気爆発が懸念される
が、本発明における水の供給量は少量であり、か
つ水の供給は酸素ランス系統で行われるので、噴
霧状となつて溶湯と接触するため、爆発の危険は
ない。この水供給の場合の一実施態様例を第４図
に示す。第４図中、３はランスパイプで、この内
部に図示するように水噴霧用のノズルチツプ３１
を設け、酸素と同時に該ノズルチツプ３１を介し
て水を供給する。 In the case of water supply, there is a risk of a steam explosion, but the amount of water supplied in the present invention is small, and the water is supplied by an oxygen lance system, so it comes into contact with the molten metal in the form of a spray. , there is no danger of explosion. An example embodiment of this water supply is shown in FIG. In Fig. 4, 3 is a lance pipe, inside which a nozzle tip 31 for water spraying is installed.
is provided, and water is supplied through the nozzle tip 31 at the same time as oxygen.
以上のように、本発明においては、溶鋼温度を
システマチツクに制御でき、該温度は決められた
許容範囲内に維持され、安定した操業を行うこと
ができる。また、設定温度を変えることにより、
必要な温度が自動的に得られるため、操業の融通
性を確保することもできる。 As described above, in the present invention, the molten steel temperature can be systematically controlled, the temperature can be maintained within a predetermined tolerance range, and stable operation can be performed. In addition, by changing the set temperature,
Since the required temperature is automatically obtained, operational flexibility can also be ensured.
次に、実施例を挙げ、本発明の効果を具体的に
示す。 Next, Examples will be given to concretely demonstrate the effects of the present invention.
実施例
第２図に示す系統図の設備を用いて、次の条件
にて連続製鋼操業を行つた。Example Using the equipment shown in the system diagram shown in FIG. 2, a continuous steel manufacturing operation was carried out under the following conditions.
溶銑供給量 200Kg／min
溶銑温度 1450℃
溶銑成分 炭素 ３％
硅素 0.2％
溶鋼温度 1650℃（許容温度±30℃）
溶鋼成分 炭素 0.2％
硅素（成分調整後） 0.3％
この操業時に、溶鋼温度を1680℃にする必要が
生じたので、その指示を制御装置９に与えたとこ
ろ、Fe―Siが0.3％、すなわち0.6Kg／minで添加
され、30℃の昇温が得られた。この時、酸素量は
6.5Nm3／minから6.9Nm3／minに変更していた。Hot metal supply rate 200Kg/min Hot metal temperature 1450℃ Hot metal composition Carbon 3% Silicon 0.2% Molten steel temperature 1650℃ (allowable temperature ±30℃) Molten steel composition Carbon 0.2% Silicon (after composition adjustment) 0.3% During this operation, the molten steel temperature is set to 1680℃ Since it became necessary to raise the temperature to 30°C, this instruction was given to the control device 9, and Fe--Si was added at 0.3%, that is, 0.6 kg/min, resulting in a temperature increase of 30°C. At this time, the amount of oxygen is
It was changed from 6.5Nm 3 /min to 6.9Nm 3 /min.
また、温度降下に際しては、その指示を制御装
置９に与えたところ、水が２／minで供給さ
れ、30℃の降温が得られた。 Further, when the temperature was to be lowered, an instruction was given to the control device 9, and water was supplied at a rate of 2/min, resulting in a temperature drop of 30°C.
更に、上記の溶鋼温度1650℃の定常操業状態に
おいて、何らかの事情で溶鋼温度が上記の許容範
囲±30℃を越えたが、直ちにFe―Si又は水の供
給がなされ、定常状態を安定して維持することが
できた。 Furthermore, in the above steady operating state where the molten steel temperature is 1650℃, if for some reason the molten steel temperature exceeds the above tolerance range of ±30℃, Fe-Si or water is immediately supplied to maintain the steady state stably. We were able to.
以上の結果から、本発明によれば、所望の溶鋼
温度を容易に得ることができ、また溶鋼温度が定
常状態を（許容範囲を越えて）逸脱した場合には
直ちに定常状態に戻すことができ、溶鋼温度の適
確な制御を行い得ることが判る。 From the above results, according to the present invention, the desired molten steel temperature can be easily obtained, and when the molten steel temperature deviates from the steady state (beyond the allowable range), it can be returned to the steady state immediately. It can be seen that the molten steel temperature can be controlled accurately.
第１図は通常の連続製鋼法を説明するためのフ
ローシート、第２図は本発明設備の一実施態様例
を説明するための系統図、第３図は本発明設備に
おける溶鋼温度制御のための操作要領の一例を示
す図、第４図は本発明に係る水供給の場合の一実
施態様例を示す図である。
Figure 1 is a flow sheet for explaining the normal continuous steel manufacturing method, Figure 2 is a system diagram for explaining an embodiment of the equipment of the present invention, and Figure 3 is for controlling the temperature of molten steel in the equipment of the present invention. FIG. 4 is a diagram showing an example of an embodiment of the water supply according to the present invention.
Claims (1)
酸素吹精を行い、精錬炉から溶鋼を連続的に生産
する連続製鋼設備において、前記精錬炉から連続
的に生産される溶鋼の温度検出装置、該溶鋼の温
度上昇手段としての前記精錬炉へのFe―Si供給
装置、該溶鋼の温度下降手段としての前記精錬炉
への水供給装置、およびFe―Si又は水の供給量
制御装置からなる前記溶鋼の温度制御手段を備え
たことを特徴とする連続製鋼設備。1 In continuous steelmaking equipment that continuously supplies hot metal to a smelting furnace, performs oxygen blowing in the smelting furnace, and continuously produces molten steel from the smelting furnace, the temperature of the molten steel continuously produced from the smelting furnace. a detection device, a Fe—Si supply device to the refining furnace as a means for increasing the temperature of the molten steel, a water supply device to the refining furnace as a means for lowering the temperature of the molten steel, and a supply amount control device for Fe—Si or water. Continuous steel manufacturing equipment characterized by comprising a temperature control means for the molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8979582A JPS58207317A (en) | 1982-05-28 | 1982-05-28 | Continuous steel making installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8979582A JPS58207317A (en) | 1982-05-28 | 1982-05-28 | Continuous steel making installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58207317A JPS58207317A (en) | 1983-12-02 |
| JPS635451B2 true JPS635451B2 (en) | 1988-02-03 |
Family
ID=13980628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8979582A Granted JPS58207317A (en) | 1982-05-28 | 1982-05-28 | Continuous steel making installation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58207317A (en) |
-
1982
- 1982-05-28 JP JP8979582A patent/JPS58207317A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58207317A (en) | 1983-12-02 |
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