CN112593045A - High-temperature alloy smelting slagging process for intermediate frequency furnace - Google Patents
High-temperature alloy smelting slagging process for intermediate frequency furnace Download PDFInfo
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- CN112593045A CN112593045A CN202011174076.8A CN202011174076A CN112593045A CN 112593045 A CN112593045 A CN 112593045A CN 202011174076 A CN202011174076 A CN 202011174076A CN 112593045 A CN112593045 A CN 112593045A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003723 Smelting Methods 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 98
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 97
- 239000002893 slag Substances 0.000 claims abstract description 53
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 31
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 31
- 239000004571 lime Substances 0.000 claims abstract description 31
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 14
- 230000023556 desulfurization Effects 0.000 claims abstract description 14
- 238000001556 precipitation Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 8
- 239000010436 fluorite Substances 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910000882 Ca alloy Inorganic materials 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 3
- 239000000378 calcium silicate Substances 0.000 claims description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 7
- 239000011574 phosphorus Substances 0.000 abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 abstract description 7
- 239000011593 sulfur Substances 0.000 abstract description 7
- 238000007670 refining Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
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- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- Y02P10/20—Recycling
Abstract
The invention discloses a high-temperature alloy smelting slagging process for an intermediate frequency furnace, which comprises the following steps: adding molten steel, precipitating and deoxidizing, smashing slag and adding lime, sampling and finely adjusting, slagging off to make new slag and tapping; compared with the prior art, the process for smelting the high-temperature alloy and slagging in the intermediate frequency furnace has the advantages that molten steel in the intermediate frequency furnace is subjected to slagging through the slagging agent, so that the molten steel is subjected to desulfurization and dephosphorization, the molten steel is subjected to precipitation deoxidation through the calcium-silicon alloy, and in addition, the molten steel is continuously refined through the steps of slag smashing, sampling fine adjustment and the like, so that the molten steel meeting the sulfur and phosphorus containing standards is obtained; the dephosphorization and desulfurization operations are realized in the refining process.
Description
Technical Field
The invention belongs to the technical field of intermediate frequency furnace smelting slagging, and particularly relates to a process for smelting high-temperature alloy slagging in an intermediate frequency furnace.
Background
The intermediate frequency furnace is a power supply device for converting power frequency 50HZ alternating current into intermediate frequency (300HZ to 1000HZ), converts three-phase power frequency alternating current into direct current after rectification, converts the direct current into adjustable intermediate frequency current, supplies the intermediate frequency alternating current flowing through a capacitor and an induction coil, generates high-density magnetic lines in the induction coil, cuts metal materials contained in the induction coil, and generates large eddy current in the metal materials. This eddy current also has some properties of medium frequency current, i.e. the free electrons of the metal itself flow in the resistive metal body to generate heat.
The medium-frequency induction furnace is widely used for smelting nonferrous metals and ferrous metals, and compared with other casting equipment, the medium-frequency induction furnace has the advantages of high heat efficiency, short smelting time, less burning loss of alloy elements, wide smelting material, small environmental pollution, capability of accurately controlling the temperature and the components of molten metal and the like; the intermediate frequency furnace heating device has the advantages of small volume, light weight, high efficiency, excellent hot processing quality, environment friendliness and the like, and is a new generation of metal heating equipment which rapidly eliminates coal-fired furnaces, gas furnaces, oil-fired furnaces and common resistance furnaces.
In the prior art, the metallurgical reaction of the medium-frequency electric furnace in the smelting process is less researched, so that a common view is formed, namely the medium-frequency electric furnace only has weak metallurgical reaction in the alloy molten steel smelting process and is difficult to carry out dephosphorization and desulfurization operations, and therefore, the medium-frequency electric furnace is basically a remelting process of scrap steel and iron alloy. In practical production, when a cast steel material is smelted in an intermediate frequency electric furnace, the phenomenon of phosphorus or sulfur exceeding the standard in the molten steel is often caused when the raw material supply fluctuates, the problem is solved by pouring out part of molten steel, adding low-phosphorus-sulfur scrap steel for re-proportioning and melting, and then causing great loss, and the improvement of a method for strengthening metallurgical reaction in the smelting process of the intermediate frequency electric furnace to control dephosphorization and desulfurization can be realized, so that a process for smelting high-temperature alloy and slagging in the intermediate frequency furnace is needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art, the invention carries out slagging on the molten steel by slagging agents such as lime, fluorite and the like, thereby carrying out desulfurization and dephosphorization on the molten steel, carrying out deoxidation on the molten steel by a silicon-calcium alloy, and further carrying out continuous refining on the molten steel by the steps of slag tamping, sampling fine adjustment and the like, thereby obtaining the molten steel meeting the standard of sulfur and phosphorus; by directly realizing dephosphorization and desulfurization operations in the smelting process, when a cast steel material is smelted in an intermediate frequency electric furnace, and when raw material supply fluctuates, partial molten steel does not need to be poured out, so that the phenomenon of phosphorus or sulfur exceeding the standard in molten steel components is avoided, namely, the loss caused by re-batching and melting in the original solution is reduced, and the provided process for smelting high-temperature alloy and slagging in the intermediate frequency furnace is provided.
In order to achieve the purpose, the invention provides the following technical scheme: a high-temperature alloy slagging process for smelting in an intermediate frequency furnace comprises the following steps:
s1, smelting molten steel, adding the molten steel at the bottom of the intermediate frequency furnace before starting the intermediate frequency furnace, calculating the initial molten steel amount according to 2/3 of the loading amount of the intermediate frequency furnace, and bottoming by using lime when adding the molten steel;
s2, precipitating and deoxidizing, adding a calcium-silicon alloy to perform precipitation and deoxidation when the initial molten steel of the loading amount reaches 2/3 of the loading amount of the intermediate frequency furnace, calculating the adding amount according to the molten steel amount in the intermediate frequency furnace, performing slag smashing after 5-10 minutes, and adding lime to make new slag to cover the surface of the molten steel;
s3, slagging and slag mixing, wherein after the new slag is manufactured, feeding is started again until the amount of the molten steel is regulated or the molten steel is added to a position 100mm away from the upper edge of a coil of the intermediate frequency furnace, then slag smashing is carried out, and lime is added to manufacture the new slag to cover;
s4, sampling and fine adjustment, namely melting the alloy in the intermediate frequency furnace according to the components of the sampling and fine adjustment, and if the easily-oxidizable elements are required to be added into the final fine-adjusted components, adding calcium silicate blocks to perform precipitation deoxidation after the components of the molten steel are uniform, and adding the alloy to be added into the furnace in an oxygen determination manner;
s5, slagging off and making new slag, slagging off after the molten steel components are qualified and the temperature is proper, adding a slagging agent to make new slag, and keeping the thickness of the molten slag within a proper thickness range;
and S6, tapping, and sometimes using a slag ladle to beat the lime surface to ensure that the lime is fully dissolved, and finally tapping.
Preferably, in step S1, the content of lime used for priming when adding molten steel is 2% to 3% of the amount of molten steel.
Preferably, in steps S2 and S4, the addition amount of the silicon-calcium alloy is 0.5kg per ton of molten steel during the precipitation deoxidation.
Preferably, in step S4, Ti and Nb are easily oxidizable elements to be added to the fine tuning component.
Preferably, in step S4, the oxygen determination process performed before the alloy is added is to detect the oxygen content of the molten steel components and control the oxygen content within the range of the high-temperature alloy smelting.
Preferably, in step S5, after the new slag is produced, a suitable thickness range of the slag thickness is set to 30mm to 50 mm.
Preferably, in step S6, the molten steel is allowed to stand still in the bottom argon-blowing ladle for at least 3 minutes, so as to ensure that the inclusions in the molten steel float up sufficiently.
Preferably, the slag former used in the intermediate frequency furnace smelting process of the high-temperature alloy comprises lime and fluorite, the lime has the capability of desulfurization and dephosphorization and is the slag former with the largest molten steel smelting dosage, and the fluorite can accelerate the dissolution of the lime and improve the fluidity of furnace slag.
The invention has the technical effects and advantages that: compared with the prior art, the process for smelting the high-temperature alloy and slagging in the intermediate frequency furnace has the advantages that molten steel in the intermediate frequency furnace is subjected to slagging through the slagging agent, so that the molten steel is subjected to desulfurization and dephosphorization, the molten steel is subjected to precipitation deoxidation through the calcium-silicon alloy, and in addition, the molten steel is continuously refined through the steps of slag smashing, sampling fine adjustment and the like, so that the molten steel meeting the sulfur and phosphorus containing standards is obtained; the dephosphorization and desulfurization operations are realized in the refining process.
Drawings
FIG. 1 is a process flow diagram of an intermediate frequency furnace smelting high-temperature alloy slagging process of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high-temperature alloy slagging process for smelting in an intermediate frequency furnace comprises the following steps:
s1, smelting molten steel, adding the molten steel at the bottom of the intermediate frequency furnace before starting the intermediate frequency furnace, calculating the initial molten steel amount according to 2/3 of the loading amount of the intermediate frequency furnace, and bottoming by using lime when adding the molten steel;
s2, precipitating and deoxidizing, adding a calcium-silicon alloy to perform precipitation and deoxidation when the initial molten steel of the loading amount reaches 2/3 of the loading amount of the intermediate frequency furnace, calculating the adding amount according to the molten steel amount in the intermediate frequency furnace, performing slag smashing after 5-10 minutes, and adding lime to make new slag to cover the surface of the molten steel;
s3, slagging and slag mixing, wherein after the new slag is manufactured, feeding is started again until the amount of the molten steel is regulated or the molten steel is added to a position 100mm away from the upper edge of a coil of the intermediate frequency furnace, then slag smashing is carried out, and lime is added to manufacture the new slag to cover;
s4, sampling and fine adjustment, namely melting the alloy in the intermediate frequency furnace according to the components of the sampling and fine adjustment, and if the easily-oxidizable elements are required to be added into the final fine-adjusted components, adding calcium silicate blocks to perform precipitation deoxidation after the components of the molten steel are uniform, and adding the alloy to be added into the furnace in an oxygen determination manner;
s5, slagging off and making new slag, slagging off after the molten steel components are qualified and the temperature is proper, adding a slagging agent to make new slag, and keeping the thickness of the molten slag within a proper thickness range;
s6, tapping, and sometimes beating the lime surface with a slag ladle to ensure that the lime is fully dissolved, and finally tapping;
the molten steel is subjected to slagging by using slagging agents such as lime, fluorite and the like, so that the molten steel is subjected to desulfurization and dephosphorization, the molten steel is subjected to deoxidation by using the silicon-calcium alloy, and the molten steel is continuously refined by the steps of slag smashing, sampling fine adjustment and the like, so that the molten steel meeting the sulfur and phosphorus containing standards is obtained;
in the step S1, the content of the lime for bottoming is 2% -3% of the molten steel amount when the molten steel is added, and sufficient slagging in the high-temperature alloy smelting process is ensured through 2% -3% of the lime for bottoming, so that the desulphurization and dephosphorization effects after slagging are ensured.
In steps S2 and S4, the amount of added calcium-silicon alloy is 0.5kg per ton of molten steel during precipitation deoxidation, 0.5kg of calcium-silicon alloy is added per ton of molten steel to remove the oxygen content in the molten steel, and the addition of calcium-silicon alloy after the molten steel has uniform components can improve the deoxidation effect of the molten steel.
In step S4, the easily oxidizable elements to be added to the fine tuning component include Ti and Nb.
In step S4, the oxygen determination process before alloy addition is to detect the oxygen content of the molten steel components and control the oxygen content in the high-temperature alloy smelting range;
and adding the silicon-calcium alloy into the molten steel after the added alloy is required to be uniform in the components of the molten steel and the molten steel is subjected to precipitation and deoxidation.
In step S5, after the new slag is produced, the proper thickness range of the slag thickness is set to be 30mm-50mm, and the thickness of the slag is kept in the proper range so as to be convenient for the smelting staff to process.
In step S6, the molten steel is kept in the bottom argon blowing ladle for at least 3 minutes, so that the inclusion in the molten steel is ensured to float upwards fully;
the molten steel is kept in the bottom argon blowing ladle for a period of time until impurities in the molten steel are fully floated, and then the impurities in the molten steel are removed, so that impurity components in the molten steel can be removed.
The slag former used in the intermediate frequency furnace smelting process of the high-temperature alloy comprises lime and fluorite, wherein the lime has the capability of desulfurization and dephosphorization and is the slag former with the largest molten steel smelting dosage, and the fluorite can accelerate the dissolution of the lime and improve the fluidity of furnace slag.
In summary, compared with the prior art, the process for slagging high-temperature alloy in the intermediate frequency furnace provided by the invention has the advantages that molten steel in the intermediate frequency furnace is subjected to slagging through a slagging agent, so that the molten steel is subjected to desulfurization and dephosphorization, the molten steel is subjected to precipitation deoxidation through a calcium-silicon alloy, and the molten steel is continuously refined through the steps of slag smashing, sampling fine adjustment and the like, so that the molten steel meeting the sulfur and phosphorus containing standards is obtained; the dephosphorization and desulfurization operations are realized in the refining process.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A high-temperature alloy slagging process for smelting in an intermediate frequency furnace is characterized by comprising the following steps: the method comprises the following steps:
s1, smelting molten steel, adding the molten steel at the bottom of the intermediate frequency furnace before starting the intermediate frequency furnace, calculating the initial molten steel amount according to 2/3 of the loading amount of the intermediate frequency furnace, and bottoming by using lime when adding the molten steel;
s2, precipitating and deoxidizing, adding a calcium-silicon alloy to perform precipitation and deoxidation when the initial molten steel of the loading amount reaches 2/3 of the loading amount of the intermediate frequency furnace, calculating the adding amount according to the molten steel amount in the intermediate frequency furnace, performing slag smashing after 5-10 minutes, and adding lime to make new slag to cover the surface of the molten steel;
s3, slagging and slag mixing, wherein after the new slag is manufactured, feeding is started again until the amount of the molten steel is regulated or the molten steel is added to a position 100mm away from the upper edge of a coil of the intermediate frequency furnace, then slag smashing is carried out, and lime is added to manufacture the new slag to cover;
s4, sampling and fine adjustment, namely melting the alloy in the intermediate frequency furnace according to the components of the sampling and fine adjustment, and if the easily-oxidizable elements are required to be added into the final fine-adjusted components, adding calcium silicate blocks to perform precipitation deoxidation after the components of the molten steel are uniform, and adding the alloy to be added into the furnace in an oxygen determination manner;
s5, slagging off and making new slag, slagging off after the molten steel components are qualified and the temperature is proper, adding a slagging agent to make new slag, and keeping the thickness of the molten slag within a proper thickness range;
and S6, tapping, and sometimes using a slag ladle to beat the lime surface to ensure that the lime is fully dissolved, and finally tapping.
2. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: in step S1, the content of lime used for bottoming when adding molten steel is 2% to 3% of the amount of molten steel.
3. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: in steps S2 and S4, the addition amount of the silicon-calcium alloy is 0.5kg per ton of molten steel during the precipitation deoxidation.
4. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: in step S4, the easily oxidizable elements to be added to the fine tuning component include Ti and Nb.
5. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: in step S4, the oxygen determination process performed before the alloy addition is to detect the oxygen content of the molten steel components and control it within the range of the high-temperature alloy smelting.
6. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: in step S5, after the new slag is produced, the appropriate thickness range of the slag thickness is set to 30mm to 50 mm.
7. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: in step S6, the molten steel is allowed to stand still in the bottom-blown argon ladle for at least 3 minutes, thereby ensuring that the inclusions in the molten steel float upward sufficiently.
8. The process for slagging high-temperature alloy smelted by an intermediate frequency furnace according to claim 1, is characterized in that: the slag former used in the intermediate frequency furnace smelting process of the high-temperature alloy comprises lime and fluorite, the lime has the capability of desulfurization and dephosphorization and is the slag former with the largest molten steel smelting amount, and the fluorite can accelerate the dissolution of the lime and improve the fluidity of furnace slag.
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| CN113832383A (en) * | 2021-10-09 | 2021-12-24 | 四川维珍高新材料有限公司 | Smelting process of high-chromium cast iron and preparation process of high-chromium cast iron pipe |
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| CN109468539A (en) * | 2018-12-28 | 2019-03-15 | 鞍钢集团（鞍山）铁路运输设备制造有限公司 | A kind of heat resisting cast steel and production method |
| CN111270045A (en) * | 2020-03-20 | 2020-06-12 | 龙岩市佳诚机械有限公司 | Process method for smelting cast steel in intermediate frequency furnace |
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