CN103484685A - Hydrogen content control method of electroslag remelting smelting molten steel - Google Patents
Hydrogen content control method of electroslag remelting smelting molten steel Download PDFInfo
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- CN103484685A CN103484685A CN201210191017.0A CN201210191017A CN103484685A CN 103484685 A CN103484685 A CN 103484685A CN 201210191017 A CN201210191017 A CN 201210191017A CN 103484685 A CN103484685 A CN 103484685A
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- air
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- heated drying
- drying air
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a hydrogen content control method of electroslag remelting smelting molten steel, according to the hydrogen content control method, air is dried, filtered and heated to form a dry hot air, and before smelting and in a melting process through a high-speed nozzle the dry hot air is continuously blew into a crystallizer so as to discharge cold and wet air in the crystallizer to form dry hot air protection to prevent cold wet air indrawing in the melting process. Dew condensation melting producing on the surface of the crystallizer in the early melting stage can be effectively prevented. The problem that hydrogen content in steel is out of limits can be effectively prevented, wherein the problem is caused by hydrogen element getting into the molten steel, and the hydrogen element is formed by decomposition of water molecules which enter the melting process due to cold wet air indrawing in the electroslag smelting process, so that the quality and grade of the steel can be ensured and the economic efficiency of enterprises can be improved.
Description
Technical field
The present invention relates to electric slag refusion and smelting, more particularly, relate to a kind of electric slag refusion and smelting molten steel hydrogen richness control method.
Background technology
Esr is for producing the important smelting production method of high-quality steel alloy.Hydrogen is the harmful element in finished steel, needs to reduce as far as possible protium and enter finished steel in the esr production process.And, in esr process, protium enters steel and mainly enters by water molecules, decomposite protium in smelting process and enter molten steel.
Through use for many years, put into practice, find to have following shortcoming in the esr production process: (1) fusing initial stage, cold crystallizer surface can produce the dewfall phenomenon; (2) can absorb the problems such as aqueous vapor in atmosphere by generating process during electric slag refusion and smelting.Cause water molecules to enter smelting process and decomposite protium and enter molten steel, and then cause hydrogen richness in steel to exceed standard, the quality that is reflected to finished steel can not meet client's specification of quality.
Summary of the invention
For the above-mentioned shortcoming existed in prior art, the purpose of this invention is to provide a kind of electric slag refusion and smelting molten steel hydrogen richness control method, can the hydrogen richness in molten steel be control effectively.
For achieving the above object, the present invention adopts following technical scheme:
This electric slag refusion and smelting molten steel hydrogen richness control method; air is formed to heated drying air after super-dry, filtration and heating; and continuously in crystallizer, be blown into before melting He in fusion process by high-velocity nozzle; in order to discharge the cold wet air in crystallizer; and form the heated drying air protection, prevent from fusion process sucking cold wet air, wherein; the dew point of the heated drying air be blown into for<-40 ℃, pressure is>=1.5kg/cm
2, flow is 10m
3/ h/ stove, heating and temperature control is at 50～90 ℃.
Described air adopts pipeline pressurized air, removes impurity through grade one filter successively, and freezing type drier is removed moisture, secondary filter is removed impurity, absorption drier is removed moisture, and tertiary filter is removed impurity, and electric heater unit heats and the formation heated drying air.
The dew point of described heated drying air is-42 ℃ ,-44 ℃ or-46 ℃.
The pressure of described heated drying air is 1.8kg/cm
2, 2kg/cm
2or 2.2kg/cm
2.
The flow of described heated drying air is 11m
3/ h/ stove, 12m
3/ h/ stove or 14m
3/ h/ stove.
The Heating temperature of described heated drying air is 60 ℃, 70 ℃ or 80 ℃.
In technique scheme; electric slag refusion and smelting molten steel hydrogen richness control method of the present invention forms heated drying air by air after super-dry, filtration and heating; and continuously in crystallizer, be blown into before melting He in fusion process by high-velocity nozzle; in order to discharge the cold wet air in crystallizer; and form the heated drying air protection, prevent from fusion process sucking cold wet air.Thereby can effectively prevent from melting the initial stage crystallizer surface and can produce the dewfall melting, and the cold wet air of suction in the electroslag smelting process, causing water molecules to enter smelting process decomposites protium and enters molten steel, cause in steel the hydrogen richness problem that exceeds standard, thereby guaranteed steel product quality and quality, improved Business Economic Benefit.
The accompanying drawing explanation
Fig. 1 is the FB(flow block) of hydrogen richness control method of the present invention.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with drawings and Examples.
Refer to shown in Fig. 1, electric slag refusion and smelting molten steel hydrogen richness control method of the present invention is by air is formed to heated drying air after processing after super-dry, filtration and heating etc., and before melting He in fusion process, continuously in crystallizer, be blown into through high-velocity nozzle by pipeline, in order to discharge the cold wet air in crystallizer, and formation heated drying air protection, prevent from fusion process sucking cold wet air, through test of many times, grope to obtain, the dew point of the heated drying air be blown into for<-40 ℃, as-42 ℃ ,-44 ℃ or-46 ℃; Pressure is>=1.5kg/cm
2, as 1.8kg/cm
2, 2kg/cm
2or 2.2kg/cm
2; Flow is 10m
3/ h/ stove, as 11m
3/ h/ stove, 12m
3/ h/ stove or 14m
3/ h/ stove; Heating and temperature control is at 50～90 ℃, as 60 ℃, 70 ℃ or 80 ℃.
As an embodiment, described air can adopt the pipeline pressurized air in factory building, remove impurity through grade one filter successively, freezing type drier is removed moisture, secondary filter is removed impurity, absorption drier is removed moisture, and tertiary filter is removed impurity, electric heater unit heating and form the heated drying air that reaches the processing requirements value.
Adopt hydrogen richness control method of the present invention, the initial stage crystallizer surface can be effectively prevented from melting and the dewfall melting can be produced, and the cold wet air of suction in the electroslag smelting process, causing water molecules to enter smelting process decomposites protium and enters molten steel, cause in steel the hydrogen richness problem that exceeds standard, thereby guaranteed steel product quality and quality, improved Business Economic Benefit.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and not be used as limitation of the invention, as long as in connotation scope of the present invention, to variation, the modification of the above embodiment, all will drop in claims scope of the present invention.
Claims (6)
1. an electric slag refusion and smelting molten steel hydrogen richness control method is characterized in that:
Air is formed to heated drying air after super-dry, filtration and heating; and continuously in crystallizer, be blown into before melting He in fusion process by high-velocity nozzle; in order to discharge the cold wet air in crystallizer; and formation heated drying air protection; prevent from fusion process sucking cold wet air; wherein, the dew point of the heated drying air be blown into for<-40 ℃, pressure is>=1.5kg/cm
2, flow is 10m
3/ h/ stove, heating and temperature control is at 50～90 ℃.
2. electric slag refusion and smelting molten steel hydrogen richness control method as claimed in claim 1 is characterized in that:
Described air adopts pipeline pressurized air, removes impurity through grade one filter successively, and freezing type drier is removed moisture, secondary filter is removed impurity, absorption drier is removed moisture, and tertiary filter is removed impurity, and electric heater unit heats and the formation heated drying air.
3. electric slag refusion and smelting molten steel hydrogen richness control method as claimed in claim 1 is characterized in that:
The dew point of described heated drying air is-42 ℃ ,-44 ℃ or-46 ℃.
4. electric slag refusion and smelting molten steel hydrogen richness control method as claimed in claim 1 is characterized in that:
The pressure of described heated drying air is 1.8kg/cm
2, 2kg/cm
2or 2.2kg/cm
2.
5. electric slag refusion and smelting molten steel hydrogen richness control method as claimed in claim 1 is characterized in that:
The flow of described heated drying air is 11m
3/ h/ stove, 12m
3/ h/ stove or 14m
3/ h/ stove.
6. electric slag refusion and smelting molten steel hydrogen richness control method as claimed in claim 1 is characterized in that:
The Heating temperature of described heated drying air is 60 ℃, 70 ℃ or 80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210191017.0A CN103484685B (en) | 2012-06-11 | 2012-06-11 | A kind of electric slag refusion and smelting molten steel hydrogen content control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210191017.0A CN103484685B (en) | 2012-06-11 | 2012-06-11 | A kind of electric slag refusion and smelting molten steel hydrogen content control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103484685A true CN103484685A (en) | 2014-01-01 |
| CN103484685B CN103484685B (en) | 2016-06-29 |
Family
ID=49825274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210191017.0A Active 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105540929A (en) * | 2016-01-14 | 2016-05-04 | 吴昊 | Environment-friendly toilet discharge ecological treatment system and method |
| CN105969932A (en) * | 2016-06-30 | 2016-09-28 | 山东钢铁股份有限公司 | Steelmaking hydrogen control method |
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52133031A (en) * | 1976-04-29 | 1977-11-08 | Ver Eederushiyutaarubueruke Ag | Production method and device for steel ingot |
| 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 |
-
2012
- 2012-06-11 CN CN201210191017.0A patent/CN103484685B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52133031A (en) * | 1976-04-29 | 1977-11-08 | Ver Eederushiyutaarubueruke Ag | Production method and device for steel ingot |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105540929A (en) * | 2016-01-14 | 2016-05-04 | 吴昊 | Environment-friendly toilet discharge ecological treatment system and method |
| CN105969932A (en) * | 2016-06-30 | 2016-09-28 | 山东钢铁股份有限公司 | Steelmaking hydrogen control method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103484685B (en) | 2016-06-29 |
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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. |