CN110358930A - A kind of method of the electro slag remelting slag that sulphur can be protected and electroslag remelting - Google Patents
A kind of method of the electro slag remelting slag that sulphur can be protected and electroslag remelting Download PDFInfo
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- CN110358930A CN110358930A CN201910745205.5A CN201910745205A CN110358930A CN 110358930 A CN110358930 A CN 110358930A CN 201910745205 A CN201910745205 A CN 201910745205A CN 110358930 A CN110358930 A CN 110358930A
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- slag
- remelting
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- parts
- sulphur
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- 239000002893 slag Substances 0.000 title claims abstract description 101
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000005864 Sulphur Substances 0.000 title claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 11
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 11
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 11
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 11
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 11
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 10
- 235000013312 flour Nutrition 0.000 claims abstract description 9
- 239000010436 fluorite Substances 0.000 claims abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 7
- 239000004571 lime Substances 0.000 claims abstract description 7
- 238000005272 metallurgy Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 11
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 239000012856 weighed raw material Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims 1
- 238000006477 desulfuration reaction Methods 0.000 abstract description 8
- 230000023556 desulfurization Effects 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 238000005303 weighing Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 239000004615 ingredient Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000004332 Citrus madurensis Nutrition 0.000 description 1
- 235000007438 Citrus mitis Nutrition 0.000 description 1
- 244000007645 Citrus mitis Species 0.000 description 1
- 108010041986 DNA Vaccines Proteins 0.000 description 1
- 229940021995 DNA vaccine Drugs 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of method of the electro slag remelting slag that can protect sulphur and electroslag remelting is related to a kind of electro slag remelting slag and electro-slag re-melting method.Solve the problems, such as that existing electro-slag re-melting method desulfurization degree is high.Electro slag remelting slag is in parts by weight by 5~9 parts of CaO, 26~35 parts of Al2O3, 50~65 part CaF2With 1~3 part of SiO2It is prepared.Method: weighing metallurgy lime block, white alundum powder, Fluorspar Powder and silica flour as raw material and dry, and carries out the starting the arc after Fluorspar Powder is added first into crystallizer, and white alundum powder and silica flour is then added, finally enters metallurgy lime block；Consutrode is welded on dummy electrode, is powered and carries out electroslag remelting, using reduction current system feeding step by step after electroslag remelting, after feeding terminates power-off, cooling and demoulding.Present invention process process more stable and be conducive to protect sulphur, avoid that desulfurization degree is excessively high, the ingot casting shaping effect being prepared is good, any surface finish.This hair is suitable for electroslag remelting.
Description
Technical field
The present invention relates to a kind of electro slag remelting slag and electro-slag re-melting methods
Background technique
Purity is high, sulfur content is low, non-metallic inclusion is few, surface of steel ingot is smooth, crystallization uniformly causes due to having for Electro Slag Remelting Steel
Close, the advantages that metallographic structure and chemical component are uniform, it is widely used in atomic energy, nuclear energy, aerospace, military project, ship, electricity
Many fields such as son, petrochemical industry, heavy-duty machinery, automobile, train.Electroslag remelting technique is the method for refining for obtaining high-quality steel ingot, electricity
It is wash heat under the high temperature conditions that slag remelting, which is crossed, can removal of inclusions, purify steel ingot, the remelting slag used in electroslag remelting can
As the heat source of consutrode, chemical component, the refining liquid steel, removal non-metallic inclusion of metal can also be controlled.Ingredient is
CaF270%+Al2O330% remelting slag (AH Φ -6 slag) is at home and abroad widely used.
General electro-slag re-melting method has a biggish desulfurization degree, and containing above and below the obtained steel ingot of electro-slag re-melting method
Sulfur content is uneven, therefore is unable to satisfy sulfur content and controls the preparation demand required in stringent austenitic stainless steel.Existing electricity
Sulfur content has exceeded 0.005~0.010% range in the steel ingot that slag remelting method obtains；Sulphur is added when using electroslag remelting
Changing iron can reduce desulfurization degree, but also not can guarantee sulfur content control in 0.005~0.010% range.Using protection gas
Atmosphere can reduce sulphur in slag and shift to gas phase, and then reduce slag system desulfurization degree, but the acquisition of protective atmosphere needs are set accordingly
It is standby, improve preparation difficulty.
Summary of the invention
The present invention is high in order to solve the problems, such as existing electro-slag re-melting method desulfurization degree, proposes a kind of electroslag weight that can protect sulphur
The method of slag and electroslag remelting.
Electro slag remelting slag of the present invention is in parts by weight by 5~9 parts of CaO, 26~35 parts of Al2O3, 50~65 part CaF2
With 1~3 part of SiO2It is prepared.
Further, the electro slag remelting slag is in parts by weight by 5 parts of CaO, 30 parts of Al2O3, 65 part CaF2With 3
The SiO of part2It is prepared.
It is followed the steps below using the method that above-mentioned electro slag remelting slag carries out electroslag remelting:
Step 1: raw material selects:
It is in parts by weight CaO:5~9 part, Al2O3: 26~35 parts, CaF2: 50~65 parts and SiO2: 1~3 part weighs smelting
Golden lime block, white alundum powder, Fluorspar Powder and silica flour are as raw material；
Step 2: raw material stoving:
The weighed raw material of step 1 is placed at 850~950 DEG C in furnace and is dried 2~4 hours；
Step 3: slag making:
The starting the arc is carried out after Fluorspar Powder is added first into crystallizer when slag making, white alundum powder and silica flour is then added, most
After enter metallurgy lime block, obtain the electro slag remelting slag that can protect sulphur；
Step 4: electroslag remelting:
Consutrode is welded on dummy electrode, is powered and carries out electroslag remelting, uses after electroslag remelting and reduces step by step
Current system feeding after feeding terminates power-off, cooling 20~30 minutes in crystallizer, finally demoulds air-cooled, obtains Electro Slag Remelting Steel
Ingot.
Further, 25~30min of slag making time described in step 3, slag making 42~47V of voltage, slag making electric current 500A~
3500A。
Further, initial current is 4000~6000A when reducing current system feeding described in step 4 step by step, at interval of
3~5min, 450~550A of decreasing current, until electric current is zero.
Further, consutrode described in step 4 is the austenitic stainless steel of sulfur content 0.01~0.015%.
Further, the diameter of consutrode described in step 4 is 100~180mm.
Further, energization described in step 4 carries out when electroslag remelting the voltage that uses as 52~58V, electric current for 4000~
6000A。
Further, can be protected described in step 4 sulphur electro slag remelting slag and consutrode mass ratio be 1:(20~
50)。
This hair principle and the utility model has the advantages that
In electro slag remelting slag of the present invention, SiO2The CaO for replacing a part, reduces basicity of slag, makes the slag in fusion process
Ingredient and technical process more stable and be conducive to protect sulphur, it is excessively high to avoid desulfurization degree, while not influencing ingot quality；Simultaneously
The quartzy interfacial tension improved between steel slag is added, the steel ingot molding obtained after electroslag remelting is more preferable, and any surface finish.This hair
Sulfur content stable and uniform in the steel ingot of bright preparation, in the range of 0.005~0.010%.
Used when electroslag remelting of the present invention device for conventional electroslag remelting equipment, therefore versatility of the present invention and applicability
By force, there is good application effect to 308L and 309L austenite steel grade, the ingot casting shaping effect being prepared is good, any surface finish.
Detailed description of the invention
Fig. 1 is electro-slag re-melting method schematic diagram in embodiment 1, and in figure, 1 is dummy electrode, and 2 be consutrode, and 3 be water cooling knot
Brilliant device, 4 be Water-cooled bottom water tank, and 5 be short net, and 6 be transformer, and 7 be slag, and 8 be metal bath, and 9 be electroslag ingot, and 10 be dummy ingot
Plate.
Specific embodiment
In order to keep the objectives, technical solutions, and advantages of the present invention more clear, with reference to the accompanying drawings and embodiments,
This hair is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and unlimited
The fixed present invention.
Embodiment 1: it is illustrated with reference to Fig. 1 the present embodiment, the present embodiment electro slag remelting slag is in parts by weight by 5 parts of CaO, 30
The Al of part2O3, 65 part CaF2With 3 parts of SiO2It is prepared.
It is followed the steps below using the method that above-mentioned electro slag remelting slag carries out electroslag remelting:
Step 1: raw material selects:
It is in parts by weight CaO:5 parts, Al2O3: 30 parts, CaF2: 65 parts and SiO2: 3 parts weigh metallurgy lime block, Bai Gang
Yu Fen, Fluorspar Powder and silica flour are as raw material；Wherein metallurgy lime block provides CaO, and white alundum powder provides Al2O3, Fluorspar Powder offer
CaF2, silica flour offer SiO2；
Step 2: raw material stoving:
The weighed raw material of step 1 is placed at 900 DEG C in furnace and is dried 3 hours；
Step 3: slag making:
The starting the arc is carried out after Fluorspar Powder is added first into crystallizer when slag making, white alundum powder and silica flour is then added, most
After enter metallurgy lime block, obtain the electro slag remelting slag that can protect sulphur；The slag making time 27min, slag making voltage 45V, slag making electricity
Flow 3000A；The starting the arc refers to that starting electroslag furnace starts slugging.
Step 4: electroslag remelting:
Consutrode is welded on dummy electrode, is powered and carries out electroslag remelting, uses after electroslag remelting and reduces step by step
Current system feeding after feeding terminates power-off, cooling 30 minutes in crystallizer, finally demoulds air-cooled, obtains electroslag ingot.
Initial current is 6000A, each decreasing current 500A when the current system feeding of reduction step by step, until electric current is
Zero.
Initial current is 4000~6000A when the current system feeding of reduction step by step, at interval of 5min decreasing current
500A, until electric current is zero.
The consutrode is the 308L austenitic stainless steel of sulfur content 0.01~0.015%；The consutrode it is straight
Diameter is 160mm；
The voltage that the energization use when electroslag remelting is 55V, electric current 6000A；
The mass ratio of the electro slag remelting slag that sulphur can be protected and consutrode is 1:40；
In the present embodiment electro slag remelting slag, SiO2The CaO for replacing a part, reduces basicity of slag, makes in fusion process
Slag ingredient and technical process more stable and be conducive to protect sulphur, it is excessively high to avoid desulfurization degree, while not influencing ingot quality；Together
When quartz be added improve interfacial tension between steel slag, the steel ingot molding obtained after electroslag remelting is more preferable, and any surface finish.This
Sulfur content stable and uniform in the steel ingot of embodiment preparation, in the range of 0.005~0.010%.When the present embodiment electroslag remelting
Use device for conventional electroslag remelting equipment, therefore the present embodiment versatility and strong applicability.Table 1 is 308L in embodiment 1
Ingredient comparison before and after remelting；
Embodiment 2:
Unlike the first embodiment, consutrode is sulfur content 0.01~0.015% to the present embodiment in the present embodiment
309L austenitic stainless steel；Electro slag remelting slag and technological parameter are same as Example 1.Table 2 is 309L remelting front and back in embodiment 2
Ingredient comparison.
By Tables 1 and 2 as it can be seen that the rate of recovery of sulphur is more stable, respectively 65.4% and 66.7%, other elements convert not
Greatly；Deoxidation effect is good, and DNA vaccine is respectively 47.6% and 57.6%, illustrates that the present embodiment method has and is preferably mingled with removal
Effect.
Table 1
| C | Si | Mn | S | P | Cr | Ni | Mo | O | |
| Before remelting | 0.010 | 0.47 | 1.74 | 0.013 | 0.007 | 19.90 | 10.51 | 0.02 | 0.021 |
| After remelting | 0.009 | 0.38 | 1.64 | 0.0085 | 0.007 | 19.86 | 10.50 | 0.02 | 0.011 |
| The rate of recovery | 65.4% | 52.4% |
Table 2
| C | Si | Mn | S | P | Cr | Ni | Mo | O | |
| Before remelting | 0.011 | 0.66 | 1.96 | 0.015 | 0.005 | 23.61 | 13.30 | 0.02 | 0.021 |
| After remelting | 0.012 | 0.55 | 1.73 | 0.010 | 0.006 | 23.35 | 13.11 | 0.02 | 0.0089 |
| The rate of recovery | 66.7% | 42.4% |
Claims (9)
1. the electro slag remelting slag that one kind can protect sulphur, it is characterised in that: electro slag remelting slag in parts by weight by 5~9 parts of CaO,
26~35 parts of Al2O3, 50~65 part CaF2With 1~3 part of SiO2It is prepared.
2. the electro slag remelting slag according to claim 1 that sulphur can be protected, it is characterised in that: electro slag remelting slag is in parts by weight
By 5 parts of CaO, 30 parts of Al2O3, 65 part CaF2With 3 parts of SiO2It is prepared.
3. the method for carrying out electroslag remelting using the electro slag remelting slag that can protect sulphur described in claim 1, it is characterised in that: should
Method follows the steps below:
Step 1: raw material selects:
It is in parts by weight CaO:5~9 part, Al2O3: 26~35 parts, CaF2: 50~65 parts and SiO2: 1~3 part weighs metallurgical stone
Grey block, white alundum powder, Fluorspar Powder and silica flour are as raw material；
Step 2: raw material stoving:
The weighed raw material of step 1 is placed at 850~950 DEG C in furnace and is dried 2~4 hours；
Step 3: slag making:
The starting the arc is carried out after Fluorspar Powder is added first into crystallizer when slag making, white alundum powder and silica flour is then added, finally enters
Metallurgy lime block obtains the electro slag remelting slag that can protect sulphur；
Step 4: electroslag remelting:
Consutrode is welded on dummy electrode, is powered and carries out electroslag remelting, is used after electroslag remelting and reduces electric current step by step
Mode feeding after feeding terminates power-off, cooling 20~30 minutes in crystallizer, finally demoulds air-cooled, obtains electroslag ingot.
4. the method according to claim 3 for carrying out electroslag remelting using the electro slag remelting slag that can protect sulphur, feature exist
In: 25~30min of slag making time described in step 3, slag making 42~47V of voltage, slag making electric current 500A~3500A.
5. the method according to claim 3 for carrying out electroslag remelting using the electro slag remelting slag that can protect sulphur, feature exist
In: initial current is 4000~6000A when reducing current system feeding step by step described in step 4, is successively decreased electricity at interval of 3~5min
450~550A is flowed, until electric current is zero.
6. the method according to claim 3 for carrying out electroslag remelting using the electro slag remelting slag that can protect sulphur, feature exist
In: consutrode described in step 4 is the austenitic stainless steel of sulfur content 0.01~0.015%.
7. the method that the electro slag remelting slag according to claim 3 that can protect sulphur carries out electroslag remelting, it is characterised in that: step
The diameter of rapid four consutrode is 100~180mm.
8. the method according to claim 3 for carrying out electroslag remelting using the electro slag remelting slag that can protect sulphur, feature exist
In: for the voltage that energization described in step 4 uses when carrying out electroslag remelting for 52~58V, electric current is 4000~6000 A.
9. the method according to claim 3 for carrying out electroslag remelting using the electro slag remelting slag that can protect sulphur, feature exist
In: the mass ratio of electro slag remelting slag and consutrode that sulphur can be protected described in step 4 is 1:(20~50).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139363A (en) * | 2019-12-14 | 2020-05-12 | 张家港广大特材股份有限公司 | Electroslag remelting method for CrNiMo alloy steel |
| CN112458304A (en) * | 2020-11-02 | 2021-03-09 | 抚顺特殊钢股份有限公司 | Electroslag remelting slag system for smelting ultra-low-carbon low-aluminum high-titanium maraging steel |
| CN114635042A (en) * | 2022-03-23 | 2022-06-17 | 青海西钢特殊钢科技开发有限公司 | High-sulfur steel electroslag remelting slag and application |
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| CN114635042A (en) * | 2022-03-23 | 2022-06-17 | 青海西钢特殊钢科技开发有限公司 | High-sulfur steel electroslag remelting slag and application |
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