CN114737010A - Slagging method for preventing high-silicon aluminum deoxidized steel ladle from being adhered with slag - Google Patents

Slagging method for preventing high-silicon aluminum deoxidized steel ladle from being adhered with slag Download PDF

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CN114737010A
CN114737010A CN202210305339.7A CN202210305339A CN114737010A CN 114737010 A CN114737010 A CN 114737010A CN 202210305339 A CN202210305339 A CN 202210305339A CN 114737010 A CN114737010 A CN 114737010A
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steel
slag
ladle
aluminum
tapping
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CN114737010B (en
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朱万军
林利平
欧阳德刚
孔勇江
蒋兴平
孙伟
沈继胜
张军
刘婳
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/36—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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention discloses a slagging method for preventing a ladle of high-silicon aluminum deoxidized steel from being bonded with slag, wherein the tapping temperature of a converter is controlled at 1625-; after tapping one third, adding silicon-manganese alloy to further remove partial oxygen; adding lime after tapping two thirds of steel from the converter, wherein the adding amount of the lime is 1.2-2.4 kg/t steel; after lime is added, stirring the bottom of the steel ladle by adopting argon gas, and continuously blowing argon gas for stirring after steel tapping is finished; after the steel ladle is conveyed to an argon station, feeding an aluminum wire into the molten steel for deoxidation alloying, wherein the adding amount of the aluminum wire is 0.4-0.7 kg/t steel; after the aluminum feeding is finished, stirring by adopting medium-strength argon gas to promote slag steel interface reaction; the invention can reduce (Al) in the high-silicon aluminum deoxidation top slag2O3) Content of Al in the slag to avoid slag formation2O3) The slag sticking problem caused by high content of the aluminum oxide, and the consumption of deoxidized aluminum alloy and slagging lime are reducedThe method not only meets the requirements of smooth production and molten steel quality, but also obviously reduces the production cost.

Description

Slagging method for preventing high-silicon aluminum deoxidized steel ladle from being adhered with slag
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a slagging method for preventing a ladle of high-silicon aluminum deoxidized steel from being adhered with slag.
Background
The top slag component has great influence on molten steel cleanliness and inclusion control, and is especially top slag oxidability (FeO + MnO). Because FeO and MnO are unstable oxides, oxygen is easily supplied to molten steel in the refining or casting process, and secondary oxidation of the molten steel is caused. Therefore, in order to reduce the top slag to molten steel, it is general to control the slag (FeO + MnO) at a low level by adding a deoxidized alloy (or deoxidizer) during tapping or refining. For the aluminum deoxidized steel grade, the oxygen in aluminum alloy deslagging is mainly added. Meanwhile, in order to adsorb impurities, high-alkalinity reductive refining slag is generally adopted, and the slag components are controlled to be CaO (MgO) -Al2O3-SiO2The low melting point (1400 to 1500 ℃) region in the phase diagram. For high-silicon aluminum deoxidized steel, a production process route of converter-argon station-RH-continuous casting is generally adopted, molten steel is deoxidized and silicon alloyed when the converter taps, and ferro-aluminum is added to modify top slag during tapping and after tapping, although aluminum deoxidation is adopted, SiO is generated when silicon alloy is processed during tapping of the converter due to high silicon content2The slag basicity is difficult to control to 3.0 or more. Therefore, the content of each component in the high-silicon aluminum deoxidized steel slag system is obviously different from that of the high-alkalinity reduced slag system of the common aluminum deoxidized steel. Due to low slag basicity and the (Al) produced after deoxidation of the top slag aluminium2O3) Into the slag resulting in top slag (Al)2O3) Compared withTherefore, the melting point of the refining slag is higher, high-melting-point phases such as magnesium aluminate spinel, CA2, CA6, melilite and the like are separated out from the top slag along with the reduction of the temperature during casting, the high-melting-point ladle slag is adhered to the wall of the ladle in large contact with a ladle refractory material, and a 'complete cover' is formed at the top or the bottom of the ladle in serious cases. The covering of the steel ladle slag or the slag adhesion not only influences the slag pouring of a large ladle and the normal operation of the steel ladle, but also reduces the effective volume of the steel ladle and the service life of the steel ladle, and brings great influence to the smooth production.
Therefore, the key technical problem to be solved by the high-silicon aluminum deoxidized steel slagging process is to stably control the components of the high-silicon aluminum deoxidized steel refining slag within a proper range and avoid the generation and precipitation of high-melting-point phase in the refining or casting process.
In order to prevent the large ladle from adhering slag, the prior art carries out a great deal of research:
the invention patent with publication number "CN 102321785B" discloses a smelting method of high-silicon low-oxygen clean steel, which adopts aluminum precipitation deoxidation at the end point of a converter, and adopts aluminum particles and carbide slag surface indirect deoxidation to smelt high-silicon low-oxygen steel in the LF refining process. Controlling the active oxygen in the steel to be less than or equal to 10ppm through aluminum deoxidation; the SiO in the slag is reduced by adding aluminum particles and calcium carbide to the slag surface for indirect deoxidation2The content is controlled, so that the alkalinity of the high-silicon steel refining slag is controlled to be more than or equal to 4, the mass percentage of slag (TFe + MnO) is less than or equal to 1%, Al deoxidation impurities are effectively adsorbed, the total oxygen content of steel is ensured to be less than or equal to 10ppm, and the high-silicon low-oxygen steel with small size, low melting point and extremely high fatigue resistance can be smelted.
The invention patent with the publication number of CN201711287175.5 discloses a ladle slag modifier and a modification treatment method, belonging to the technical field of metallurgy. The modifier comprises the following components in percentage by weight: 50-80% of (CaO) and (SiO)2)5-15％、(MgO)5-20％、(Al2O3) 5-15%, S is less than or equal to 0.08%, and P is less than or equal to 0.025%. The method for modifying the ladle slag by using the modifier is to add the modifier in the steel-making tapping process. The modifier is applied to the steelmaking processes including converter steelmaking, refining and continuous casting steel casting, and silicon steel slag originally containing high-melting-point phase is modified into low-melting-point phaseSlag is used for reducing the precipitation of high-melting-point phase of the ladle slag, so that the melting temperature and the adhesion performance of the ladle slag are reduced, the phenomenon that the weight of the ladle slag is increased when the high-silicon high-aluminum steel is produced is overcome, and the smooth production is ensured.
The invention patent with publication number 'CN200910029248. X' discloses 'a fluorine-free slag modifier for preventing slag adhesion of ladle refining equipment, a preparation method and a use method thereof', wherein the slag modifier consists of active lime, bauxite and boric anhydride, and the slag modifier comprises the following chemical components in percentage by mass: (CaO) 75-85%, (Al)2O3)10～20％，(B2O3) 5-15%, MgO 0-8%, and the balance of impurities, wherein (SiO)2)＜7.0％，(H2O) < 0.05%, and the total amount of sulfur and phosphorus < 0.01%. When the slag-bonding agent is used, if the slag-bonding of the steel ladle is controlled, the steel ladle is put into the steel-making furnace at the later tapping stage, and if the slag-bonding agent is used for controlling the RH dip pipe or the CAS-OB dip cover and the like to dip into steel ladle equipment to bond slag, the slag-bonding agent is added into a refining station. The slag modifier can effectively control slag adhesion of refining equipment, prolong the service life of refractory materials, is beneficial to reducing the contents of sulfur, oxygen and impurities in steel, and is simple to prepare, convenient to store, transport and use.
The invention with the publication number of 'CN 201510244574.8' discloses a method for modifying silicon steel top slag, which is characterized in that aluminum iron powder or aluminum powder is flatly paved on the surface of steel ladle top slag, the molten steel is violently reacted by feeding calcium wires into the molten steel, the aim of deoxidizing the steel slag is achieved, and a certain calming time is needed.
The technology is mainly characterized in that a slagging agent or a slag modifier is added in the converter tapping process or the refining process for slagging so as to reduce the melting point of top slag and prevent a ladle from sticking slag. The addition of the slagging agent not only increases the production cost, but also cannot play a role in slagging due to uneven addition, the capping phenomenon still exists in the production, and the problem in the high-silicon aluminum steel slag cannot be fundamentally solved by adding the slagging agent.
Disclosure of Invention
The invention aims to provide a slagging process method for preventing a ladle of high-silicon aluminum deoxidized steel from being adhered with slag, and reducing high-silicon aluminum deoxidationIn oxygen top slag (Al)2O3) Content of Al in the slag to avoid slag formation2O3) The slag sticking problem caused by high content, and simultaneously, the consumption of deoxidized aluminum alloy and slagging lime is reduced, and the production cost is reduced.
In order to achieve the purpose, the technical scheme is as follows:
a slagging method for preventing a high-silicon aluminum deoxidized steel ladle from being adhered with slag comprises the following steps:
(1) controlling the tapping temperature of the converter at 1625-; adding silicon-manganese alloy after tapping one third to further remove partial oxygen;
(2) adding lime after tapping two thirds of steel from the converter, wherein the adding amount of the lime is 1.2-2.4 kg/t steel; after lime is added, stirring the bottom of the steel ladle by adopting argon gas, and continuously blowing argon gas for stirring after steel tapping is finished;
(3) after the steel ladle is conveyed to an argon station, feeding an aluminum wire into the molten steel for deoxidation alloying, wherein the adding amount of the aluminum wire is 0.4-0.7 kg/t steel; after the aluminum feeding is finished, stirring by adopting medium-intensity argon gas quantity to promote slag steel interface reaction.
According to the scheme, the converter tapping temperature in the step 1 is controlled to be 1635-1655 ℃; the addition amount of the aluminum alloy is 0.35-0.50 kg/t steel.
According to the scheme, the adding amount of the silicon-manganese alloy in the step 1 is controlled according to 50-70% of the target component.
According to the scheme, the adding amount of lime in the step 2 is 1.6-2.0 kg/t steel.
According to the scheme, the argon blowing flow in the step 2 is 400-800L/min; and continuously blowing argon and stirring for more than 3 min.
Optimally, the argon blowing flow in the step 2 is 500-700L/min.
According to the scheme, the tapping process also comprises the step of pushing off slag by adopting a sliding plate, and the slag thickness is controlled to be less than or equal to 40 mm.
According to the scheme, the adding amount of the aluminum wire in the step 3 is 0.5-0.6 kg/t steel;
according to the scheme, the argon blowing intensity in the step 3 is controlled to be 250-550L/min, and the argon blowing time is controlled to be 8-15 min.
Optimally, the argon blowing intensity in the step 3 is controlled to be 350-450L/min, and the argon blowing time is controlled to be 10-12 min.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the traditional aluminum-adding strong deoxidation process is replaced by aluminum-adding semi-deoxidation and silicon-manganese composite deoxidation during tapping, so that aluminum deoxidation products in the tapping process are reduced; meanwhile, the slag deoxidation adopts an argon station to feed an aluminum wire to blow argon and stir so as to carry out slag steel interface deoxidation instead of the traditional slag surface deoxidation with aluminum alloy, thereby reducing the burning loss of the aluminum alloy on the slag surface, reducing the consumption of the aluminum alloy and reducing the slag (Al2O 3). The invention performs low-cost deoxidation and (Al)2O3) The content accurate control process can reduce (Al) in the high-silicon aluminum deoxidation top slag2O3) Content of Al in the slag to avoid slag formation2O3) The slag sticking problem caused by high content is solved, the consumption of deoxidized aluminum alloy and slagging lime is reduced, the requirements of smooth production and molten steel quality are met, and the production cost is obviously reduced.
Detailed Description
The following examples further illustrate the technical solutions of the present invention, but should not be construed as limiting the scope of the present invention.
The specific embodiment provides a slagging method for preventing a ladle of high-silicon aluminum deoxidized steel from being adhered with slag, and the production of the high-silicon aluminum deoxidized steel in a converter-argon station-RH process adopts the following main technical characteristics:
(1) to reduce (Al) in slag2O3) And (3) adding a small amount of aluminum alloy into the steel for semi-deoxidation: controlling the tapping temperature of the converter at 1625-; and after one third of the steel is tapped, adding silicon-manganese alloy to further remove part of oxygen. In the optimized scheme, the tapping temperature of the converter is controlled to be 1635-1655 ℃; the adding amount of the aluminum alloy is 0.35-0.50 kg/t steel; the adding amount of the silicon-manganese alloy in the step 1 is controlled according to 50-70% of the target component (manganese content).
(2) In order to promote quick melting of lime, the action of violent stirring of high-temperature molten steel in the tapping process is utilized, and the lime is added during tapping: after two thirds of steel is tapped from the converter, lime is added through a high-level bunker, the adding amount of the lime is 1.2-2.4 kg/t of steel, after the lime is added, the bottom of a steel ladle is stirred by adopting large argon, the argon blowing flow is 400-800L/min, and the argon blowing stirring is continued for more than or equal to 3min after the tapping is finished; the argon blowing flow rate in the optimized scheme is 500-700L/min.
(3) After the ladle is transported to an argon station, in order to reduce top slag oxidation terms and control the (Al) in slag2O3) And (3) adding aluminum-iron alloy on the slag surface, feeding an aluminum wire into the molten steel for deoxidation alloying, wherein the adding amount of the aluminum wire is 0.4-0.7 kg/t of steel, stirring by adopting medium-strength argon gas amount after the aluminum feeding is finished to promote slag-steel interface reaction, removing oxygen in slag on one hand, and enabling the slag to react uniformly on the other hand, so that slag adhesion caused by local high-temperature phase precipitation due to non-uniform slag jacking components is avoided. Controlling the argon blowing intensity at 250-550L/min and controlling the argon blowing time at 8-15 min; in the optimized scheme, the adding amount of the aluminum wire is 0.5-0.6 kg/t steel, the argon blowing strength is controlled to be 350-450L/min, and the argon blowing time is controlled to be 10-12 min.
In the specific embodiment, in order to reduce the consumption of slag adjusting materials, the sliding plate is adopted for stopping slag in the tapping process, and the slag thickness is controlled to be less than or equal to 40 mm.
The following examples were carried out on a 200t converter, using the method according to the invention, and the RH-arrival slag composition was analysed.
Example 1
The production of the high-silicon aluminum deoxidized steel by a 200t converter-argon station-RH process comprises the following steps:
converter blowing finishing temperature 1665 ℃, end point [ O ]]0.066 percent, adding aluminum alloy for deoxidation when tapping to 1/5, wherein the adding amount is 0.60kg/t steel; one third of the tapping is added with silicon-manganese alloy to further remove partial oxygen. When two thirds of steel is tapped from the converter, lime is added through an overhead bunker, the adding amount of the lime is 2.4kg/t of steel, after the lime is added, the bottom of a steel ladle is stirred by adopting argon gas, the argon blowing flow is 800L/min, and after the steel tapping is finished, the argon blowing stirring is continued for 3 min. And (4) stopping slag by adopting a sliding plate during tapping, and measuring the thickness of the slag from the argon station to the station to be 40 mm. After the ladle is transported to an argon station, in order to reduce top slag oxidation terms, aluminum-iron alloy is not added on the slag surface, an aluminum wire is fed into molten steel for deoxidation alloying, the adding amount of the aluminum wire is 0.7kg/t steel, and after the aluminum feeding is finished, the aluminum wire is adoptedStirring the medium-intensity argon gas to promote the slag steel interface reaction, controlling the argon blowing intensity at 550L/min, and controlling the argon blowing time at 15 min. And (3) taking a slag sample for analysis after the argon station treatment is finished, wherein the slag comprises the following components in percentage by mass: CaO-41.83%, SiO2-25.51％，Al2O3-25.18％，MgO-5.08％，(MnO+TFe)-0.81％。
Example 2
The 200t converter-argon station-RH process is used for producing the high-silicon aluminum deoxidized steel:
end temperature of converter blowing 1655 deg.C, end point [ O ]]0.060 percent, adding aluminum alloy for deoxidation when tapping to 1/5, wherein the adding amount is 0.40kg/t steel; one third of the tapping is added with silicon-manganese alloy to further remove partial oxygen. When two thirds of steel is tapped from the converter, lime is added through the high-level bunker, the lime addition amount is 2.0kg/t steel, after the lime is added, the bottom of the steel ladle is stirred by adopting large argon, the argon blowing flow is 500L/min, and after the steel tapping is finished, the argon blowing stirring is continued for 4 min. And (4) stopping slag by adopting a sliding plate during tapping, and measuring that the thickness of the slag from the argon station to the station is 35 mm. After the ladle is conveyed to an argon station, in order to reduce top slag oxidation items, aluminum-iron alloy is not added on the slag surface, an aluminum wire is fed into molten steel for deoxidation alloying, the adding amount of the aluminum wire is 0.5kg/t steel, after aluminum feeding is finished, slag-steel interface reaction is promoted by adopting medium-intensity argon gas for stirring, the argon blowing intensity is controlled at 450L/min, and the argon blowing time is controlled at 10 min. And (3) taking a slag sample for analysis after the argon station treatment is finished, wherein the slag comprises the following components in percentage by mass: CaO-39.88%, SiO2-31.04％，Al2O3-21.71％，MgO-6.17％，(MnO+TFe)-1.20％。
Example 3
The 200t converter-argon station-RH process is used for producing the high-silicon aluminum deoxidized steel:
end temperature of converting 1645 ℃ and end point [ O ]]0.055 percent, adding aluminum alloy for deoxidation when tapping to 1/5, wherein the adding amount is 0.25kg/t steel; one third of the tapping is added with silicon-manganese alloy to further remove partial oxygen. When two thirds of steel is tapped from the converter, lime is added through an overhead bunker, the adding amount of the lime is 1.5kg/t steel, after the lime is added, the bottom of a steel ladle is stirred by adopting argon gas, the argon blowing flow is 400L/min, and after the steel tapping is finished, the argon blowing stirring is continued for 5 min. The steel tapping adopts a sliding plate to block slag, and the argon arrival is measuredThe thickness of the station slag is 40 mm. After the ladle is transported to an argon station, in order to reduce top slag oxidation, aluminum-iron alloy is not added on the slag surface, an aluminum wire is fed into molten steel for deoxidation alloying, the adding amount of the aluminum wire is 0.6kg/t steel, after the aluminum feeding is finished, slag-steel interface reaction is promoted by adopting medium-strength argon gas stirring, the argon blowing strength is controlled at 250L/min, and the argon blowing time is controlled at 12 min. And (3) taking a slag sample for analysis after the treatment in the argon station is finished, wherein the slag comprises the following components in percentage by mass: CaO-41.68%, SiO2-29.88％，Al2O3-20.69％，MgO-6.85％，(MnO+TFe)-0.9％。
Example 4
The 200t converter-argon station-RH process is used for producing the high-silicon aluminum deoxidized steel:
end temperature of converting in 1625 deg.C, end point [ O ]]0.059 percent, adding aluminum alloy for deoxidation when tapping to 1/5, wherein the adding amount is 0.35kg/t steel; one third of the tapping is added with silicon-manganese alloy to further remove partial oxygen. When two thirds of steel is tapped from the converter, lime is added through an overhead bunker, the adding amount of the lime is 1.2kg/t steel, after the lime is added, the bottom of a steel ladle is stirred by adopting argon gas, the argon blowing flow is 600L/min, and after the steel tapping is finished, the argon blowing stirring is continued for 4.5 min. And (4) stopping slag by adopting a sliding plate during tapping, and measuring the thickness of the slag from the argon station to the station to be 40 mm. After the ladle is conveyed to an argon station, in order to reduce top slag oxidation terms, aluminum-iron alloy is not added on the slag surface, an aluminum wire is fed into molten steel for deoxidation alloying, the adding amount of the aluminum wire is 0.4kg/t steel, after the aluminum feeding is finished, slag-steel interface reaction is promoted by adopting medium-strength argon gas stirring, the argon blowing strength is controlled at 350L/min, and the argon blowing time is controlled at 8 min. And (3) taking a slag sample for analysis after the argon station treatment is finished, wherein the slag comprises the following components in percentage by mass: CaO-42.02%, SiO2-32.2％，Al2O3-18.5％，MgO-5.98％，(MnO+TFe)-1.3％。

Claims (10)

1. A slagging method for preventing a ladle of high-silicon aluminum deoxidized steel from being adhered with slag is characterized by comprising the following steps:
(1) controlling the tapping temperature of the converter at 1625-; after tapping one third, adding silicon-manganese alloy to further remove partial oxygen;
(2) adding lime after tapping two thirds of steel from the converter, wherein the adding amount of the lime is 1.2-2.4 kg/t steel; after lime is added, stirring the bottom of the steel ladle by adopting argon gas, and continuously blowing argon gas for stirring after steel tapping is finished;
(3) after the steel ladle is conveyed to an argon station, feeding an aluminum wire into the molten steel for deoxidation alloying, wherein the adding amount of the aluminum wire is 0.4-0.7 kg/t steel; after the aluminum feeding is finished, the slag steel interface reaction is promoted by stirring with moderate-intensity argon gas.
2. The slagging method for preventing the ladle of the high silicon aluminum deoxidized steel from being bonded with the slag as claimed in claim 1, wherein the tapping temperature of the converter in the step 1 is controlled at 1635-1655 ℃; the addition amount of the aluminum alloy is 0.35-0.50 kg/t steel.
3. The slagging method for preventing the ladle of the high silicon aluminum deoxidized steel from being adhered with slag according to claim 1, wherein the adding amount of the silicon-manganese alloy in the step 1 is controlled according to 50 to 70 percent of the target component.
4. The slagging method for preventing the ladle of the high silicon aluminum deoxidized steel from being adhered with slag according to claim 1, wherein the addition amount of lime in the step 2 is 1.6 to 2.0kg/t steel.
5. The slagging method for preventing the ladle of the high-silicon aluminum killed steel from being bonded with slag according to claim 1, wherein the argon blowing flow in the step 2 is 400-800L/min; and continuously blowing argon and stirring for more than 3 min.
6. The slagging method for preventing the ladle of the high silicon aluminum killed steel from being bonded with slag according to claim 5, wherein the argon blowing flow rate in the step 2 is 500-700L/min.
7. The slagging method for preventing the ladle of the high-silicon aluminum deoxidized steel from being stuck with the slag as claimed in claim 1, characterized in that the tapping process further comprises the step of pushing off the slag by a sliding plate, and the slag thickness is controlled to be less than or equal to 40 mm.
8. The slagging method for preventing the ladle of the high-silicon aluminum killed steel from being bonded with slag as claimed in claim 1, wherein the addition amount of the aluminum wire in the step 3 is 0.5-0.6 kg/t steel.
9. The slagging method for preventing the ladle of the high silicon aluminum deoxidized steel from being adhered with slag according to claim 1, wherein the argon blowing strength in the step 3 is controlled to be 250-550L/min, and the argon blowing time is controlled to be 8-15 min.
10. The slag-making method for preventing the ladle of the high silicon aluminum killed steel from being adhered with slag as claimed in claim 9, wherein in the step 3, the argon blowing strength is controlled to be 350-450L/min, and the argon blowing time is controlled to be 10-12 min.
CN202210305339.7A 2022-03-25 2022-03-25 Slag-making method for preventing slag adhesion of high-silicon aluminum deoxidized steel ladle Active CN114737010B (en)

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CN115505685A (en) * 2022-09-05 2022-12-23 河钢乐亭钢铁有限公司 Method for reducing oxidative damage of RH top slag of ultra-low carbon steel

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US20020174746A1 (en) * 2001-04-02 2002-11-28 Clay Gross Ladle refining of steel
CN112961960A (en) * 2021-02-03 2021-06-15 重庆钢铁股份有限公司 Technological method for improving abnormal condition of tapping slag
CN113278764A (en) * 2021-04-27 2021-08-20 东北特殊钢集团股份有限公司 Smelting method for improving sulfur dispersion of medium-carbon sulfur-containing steel

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KR19990047461A (en) * 1997-12-04 1999-07-05 이구택 Method for deoxidizing ladle slag of aluminum deoxidized steel
US20020174746A1 (en) * 2001-04-02 2002-11-28 Clay Gross Ladle refining of steel
CN112961960A (en) * 2021-02-03 2021-06-15 重庆钢铁股份有限公司 Technological method for improving abnormal condition of tapping slag
CN113278764A (en) * 2021-04-27 2021-08-20 东北特殊钢集团股份有限公司 Smelting method for improving sulfur dispersion of medium-carbon sulfur-containing steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115505685A (en) * 2022-09-05 2022-12-23 河钢乐亭钢铁有限公司 Method for reducing oxidative damage of RH top slag of ultra-low carbon steel
CN115505685B (en) * 2022-09-05 2023-08-25 河钢乐亭钢铁有限公司 Method for reducing oxidizing hazard of RH top slag of ultra-low carbon steel

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