CN103484685B - A kind of electric slag refusion and smelting molten steel hydrogen content control method - Google Patents
A kind of electric slag refusion and smelting molten steel hydrogen content control method Download PDFInfo
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- CN103484685B CN103484685B CN201210191017.0A CN201210191017A CN103484685B CN 103484685 B CN103484685 B CN 103484685B CN 201210191017 A CN201210191017 A CN 201210191017A CN 103484685 B CN103484685 B CN 103484685B
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Abstract
The invention discloses a kind of electric slag refusion and smelting molten steel hydrogen content control method; air is formed dry hot-air by this control method after super-dry, filtration and heating; and and before melting fusion process is continuously blown in crystallizer by high speed nozzle; in order to discharge the cold humid air in crystallizer; and form dry hot-air protection, it is prevented that fusion process sucks cold humid air.It is thus possible to effectively prevent fusing initial stage crystallizer surface from can produce condensation melting, and electroslag smelting process sucks cold humid air, cause hydrone to enter smelting process to decomposite protium and enter molten steel, cause hydrogen content excessive problem in steel, thus ensure that steel product quality and quality, improve Business Economic Benefit.
Description
Technical field
The present invention relates to electric slag refusion and smelting, more particularly, it relates to a kind of electric slag refusion and smelting molten steel hydrogen content control method.
Background technology
Electroslag remelting is the important smelting production method producing high-quality steel alloy.Hydrogen is the harmful element in finished steel, needs to reduce protium as far as possible and enter finished steel in electroslag remelting production process.And in esr process, protium enters steel and enters mainly through hydrone, smelting process decomposites protium and enters molten steel.
Use through for many years is put into practice, it has been found that (1) the fusing initial stage that has the disadvantage in that in electroslag remelting production process cold crystallizer surface can produce dew condensation phenomenon；(2) problems such as the aqueous vapor in air can be absorbed by generating process during electric slag refusion and smelting.Causing hydrone to enter smelting process and decomposite protium entrance molten steel, in turn result in hydrogen content in steel and exceed standard, the quality reflected to finished steel can not meet the prescription of client.
Summary of the invention
For the disadvantages mentioned above existed in prior art, it is an object of the invention to provide a kind of electric slag refusion and smelting molten steel hydrogen content control method, it is possible to the hydrogen content in molten steel is control effectively.
For achieving the above object, the present invention adopts the following technical scheme that
This electric slag refusion and smelting molten steel hydrogen content control method; air is formed after super-dry, filtration and heating dry hot-air; and and before melting fusion process is continuously blown in crystallizer by high speed nozzle; in order to discharge the cold humid air in crystallizer; and form dry hot-air protection, it is prevented that fusion process sucks cold humid air, wherein; the dew point of the dry hot-air being blown into is <-40 DEG C, and pressure is >=1.5kg/cm2, flow is 10m3/ h/ stove, heating and temperature control is at 50～90 DEG C.
Described air adopts pipeline compression air, removes impurity through grade one filter successively, and freezing type drier removes moisture, secondary filter removes impurity, absorption drier removes moisture, and impurity removed by tertiary filter, and electric heater unit heats and forms dry hot-air.
The dew point of described dry hot-air is-42 DEG C ,-44 DEG C or-46 DEG C.
The pressure of described dry hot-air is 1.8kg/cm2、2kg/cm2Or 2.2kg/cm2。
The heating-up temperature of described dry hot-air is 60 DEG C, 70 DEG C or 80 DEG C.
In technique scheme; air is formed dry hot-air by the electric slag refusion and smelting molten steel hydrogen content control method of the present invention after super-dry, filtration and heating; and and before melting fusion process is continuously blown in crystallizer by high speed nozzle; in order to discharge the cold humid air in crystallizer; and form dry hot-air protection, it is prevented that fusion process sucks cold humid air.It is thus possible to effectively prevent fusing initial stage crystallizer surface from can produce condensation melting, and electroslag smelting process sucks cold humid air, cause hydrone to enter smelting process to decomposite protium and enter molten steel, cause hydrogen content excessive problem in steel, thus ensure that steel product quality and quality, improve Business Economic Benefit.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the hydrogen content control method of the present invention.
Detailed description of the invention
Technical scheme is further illustrated below in conjunction with drawings and Examples.
Refer to shown in Fig. 1; the electric slag refusion and smelting molten steel hydrogen content control method of the present invention is by forming dry hot-air after being processed after super-dry, filtration and heating etc. by air; and and fusion process is continuously blown in crystallizer before melting through high speed nozzle by pipeline; in order to discharge the cold humid air in crystallizer; and form dry hot-air protection; prevent from fusion process sucks cold humid air; grope to obtain through test of many times; the dew point of the dry hot-air being blown into is <-40 DEG C, such as-42 DEG C ,-44 DEG C or-46 DEG C；Pressure is >=1.5kg/cm2, such as 1.8kg/cm2、2kg/cm2Or 2.2kg/cm2；Flow is 10m3/ h/ stove, such as 11m3/ h/ stove, 12m3/ h/ stove or 14m3/ h/ stove；Heating and temperature control is at 50～90 DEG C, such as 60 DEG C, 70 DEG C or 80 DEG C.
As an embodiment, described air can adopt the pipeline compression air in Factory Building, impurity is removed successively through grade one filter, freezing type drier removes moisture, secondary filter removes impurity, absorption drier remove moisture, tertiary filter remove impurity, electric heater unit heating and formed reach process required value dry hot-air.
Adopt the hydrogen content control method of the present invention, can effectively prevent fusing initial stage crystallizer surface from can produce condensation melting, and electroslag smelting process sucks cold humid air, cause hydrone to enter smelting process to decomposite protium and enter molten steel, cause hydrogen content excessive problem in steel, thus ensure that steel product quality and quality, improve Business Economic Benefit.
Those of ordinary skill in the art will be appreciated that, above embodiments is intended merely to the explanation present invention, and it is not used as limitation of the invention, as long as in the spirit of the present invention, to the change of embodiment described above, modification all by the Claims scope dropping on the present invention.
Claims (4)
1. an electric slag refusion and smelting molten steel hydrogen content control method, it is characterised in that:
Air is formed after super-dry, filtration and heating dry hot-air; and and before melting fusion process is continuously blown in crystallizer by high speed nozzle; in order to discharge the cold humid air in crystallizer; and form dry hot-air protection; prevent from fusion process sucks cold humid air; wherein, the dew point of the dry hot-air being blown into is <-40 DEG C, and pressure is >=1.5kg/cm2, flow is 10m3/ h/ stove, heating and temperature control is at 50～90 DEG C；
Described air adopts pipeline compression air, removes impurity through grade one filter successively, and freezing type drier removes moisture, secondary filter removes impurity, absorption drier removes moisture, and impurity removed by tertiary filter, and electric heater unit heats and forms dry hot-air.
2. electric slag refusion and smelting molten steel hydrogen content control method as claimed in claim 1, it is characterised in that:
The dew point of described dry hot-air is-42 DEG C ,-44 DEG C or-46 DEG C.
3. electric slag refusion and smelting molten steel hydrogen content control method as claimed in claim 1, it is characterised in that:
The pressure of described dry hot-air is 1.8kg/cm2、2kg/cm2Or 2.2kg/cm2。
4. electric slag refusion and smelting molten steel hydrogen content control method as claimed in claim 1, it is characterised in that:
The heating-up temperature of described dry hot-air is 60 DEG C, 70 DEG C or 80 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210191017.0A CN103484685B (en) | 2012-06-11 | 2012-06-11 | A kind of electric slag refusion and smelting molten steel hydrogen content control method |
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| CN201210191017.0A CN103484685B (en) | 2012-06-11 | 2012-06-11 | A kind of electric slag refusion and smelting molten steel hydrogen content control method |
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| CN103484685A CN103484685A (en) | 2014-01-01 |
| CN103484685B true CN103484685B (en) | 2016-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105540929A (en) * | 2016-01-14 | 2016-05-04 | 吴昊 | Environment-friendly toilet discharge ecological treatment system and method |
| CN105969932B (en) * | 2016-06-30 | 2018-04-06 | 山东钢铁股份有限公司 | A kind of method for making steel control hydrogen |
| CN107604173A (en) * | 2017-08-23 | 2018-01-19 | 舞阳钢铁有限责任公司 | A kind of heavy slab electroslag furnace melting speed control technique |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032623U (en) * | 1988-04-13 | 1989-02-15 | 上海交通大学 | Smelting furnace for electroslag remelting low hydrogen containing steel ingot |
| CN1078500A (en) * | 1992-05-15 | 1993-11-17 | 上海重型机器厂 | A kind of electroslag technology that prevents to increase hydrogen |
| CN201962334U (en) * | 2010-12-27 | 2011-09-07 | 中原特钢股份有限公司 | Gas protecting device for re-smelting electric slag |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT360062B (en) * | 1976-04-29 | 1980-12-29 | Ver Edelstahlwerke Ag | METHOD FOR PRODUCING LOW-HYDROGEN AND LOW-SULFUR STEEL BLOCKS BY THE ELECTRO-SLAG REFLOWING METHOD AND DEVICE FOR IMPLEMENTING THE METHOD |
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- 2012-06-11 CN CN201210191017.0A patent/CN103484685B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032623U (en) * | 1988-04-13 | 1989-02-15 | 上海交通大学 | Smelting furnace for electroslag remelting low hydrogen containing steel ingot |
| CN1078500A (en) * | 1992-05-15 | 1993-11-17 | 上海重型机器厂 | A kind of electroslag technology that prevents to increase hydrogen |
| CN201962334U (en) * | 2010-12-27 | 2011-09-07 | 中原特钢股份有限公司 | Gas protecting device for re-smelting electric slag |
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Effective date of registration: 20200511 Address after: 200940 room 1277, building 216, 1269 Shuishui Road, Baoshan District, Shanghai Patentee after: Baowu Special Metallurgy Co., Ltd Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |