CN114029462B - Rare earth oxide-containing continuous casting mold flux for high-titanium low-aluminum steel and preparation method thereof - Google Patents
Rare earth oxide-containing continuous casting mold flux for high-titanium low-aluminum steel and preparation method thereof Download PDFInfo
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- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- B22D11/11—Treating the molten metal
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Abstract
The invention relates to the technical field of steel continuous casting, in particular to a rare earth oxide-containing continuous casting mold flux for high-titanium low-aluminum steel and a preparation method thereof. The continuous casting covering slag comprises the following components in percentage by mass:CaO 18～23％、SiO 2 17～21％、Al 2 O 3 10～15％、MgO 2～5％、Na 2 O 8～12％、F ‑ 4～7％、B 2 O 3 1～5％、TiO 2 1～4％、Ce 2 O 3 12 to 15 percent and C2 to 5 percent, and the balance of inevitable impurities. According to the invention, through designing the component formula and the proportion of the covering slag, the components in the covering slag have synergistic effect, the CaO content is reduced, and the high melting point CaTiO is inhibited 3 To reduce SiO 2 Content, inhibiting the performance deterioration of the casting powder caused by slag steel reaction; simultaneously adding a certain amount of low rare earth oxide Ce 2 O 3 And a small amount of TiO 2 The casting powder has good lubricating property and heat transfer capacity, the continuous casting process is smooth, and the number of continuous casting furnaces and the quality of casting blanks are improved.
Description
Technical Field
The invention relates to the technical field of steel continuous casting, in particular to a rare earth oxide-containing continuous casting mold flux for high-titanium low-aluminum steel and a preparation method thereof.
Background
As a functional material in the continuous casting process, the metallurgical functions in the mold can be classified into the following five types: (1) preventing secondary oxidation of molten steel; (2) heat insulation and heat preservation; (3) absorbing non-metallic inclusions; (4) controlling the lubrication between the crystallizer and the casting blank; and (5) improving heat transfer between the crystallizer and the casting blank. The quality of the performance of the covering slag directly determines the quality of a casting blank, thereby influencing the production benefit.
The addition of alloy elements into the steel can effectively improve the performance of the steel, but also has different degrees of influence on the technological process. Due to the addition of Al and Ti in the corrosion-resistant alloy steel, al is inevitably generated in the smelting process 2 O 3 、TiO 2 TiN, and the like, and Al and Ti in steel and SiO in mold flux in the continuous casting process 2 The redox reaction that takes place:
[Ti]+(SiO 2 )＝(TiO 2 )+[Si]
4[Al]+3(SiO 2 )＝2(Al 2 O 3 )+3[Si]
therefore, siO in the mold flux 2 The consumption of (b) causes a drastic change in the properties of the mold flux. In addition, inclusions generated during the smelting process also enter the mold flux, and the changes can cause the melting temperature, viscosity and the like of the mold fluxThe performance deterioration affects the lubrication and heat transfer of the casting powder, the produced casting blank has surface quality problems of different degrees, and serious accidents such as cohesive steel leakage and the like can be caused in serious cases.
For example, patent CN105642849A discloses a mold flux for titanium-containing steel continuous casting, the mold flux comprises the following components by weight percent: 15 to 35 percent of CaO and SiO 2 7～15％、Al 2 O 3 10～30％、F - 3～15％、Li 2 O3～10％、BaO5～20％、Mn 2 O 3 5-20%, C2-12%, mgO less than or equal to 1.5% and Fe 2 O 3 Less than or equal to 2 percent. SiO in the covering slag 2 Less content, thereby reducing SiO 2 The activity of (2) inhibits the burning loss of Ti in the steel, but the strong oxidant Mn 2 O 3 The Ti in the steel can also react with the Ti in the steel, and the burning loss of the Ti in the steel is not fundamentally solved.
Patent CN111531140A discloses a titanium-containing steel high-titanium-oxide continuous casting mold flux, which comprises the following components in percentage by weight: 31 to 45 percent of (CaO + BaO + MgO + SrO) and SiO 2 9～13％、Al 2 O 3 18～26％、(NaF+CaF 2 +BaF 2 )10～16％、Li 2 O5～10％、B 2 O 3 2-4%, C5-10% and TiO 2 10 to 20 percent, and the balance of inevitable impurities. TiO in the covering slag 2 The higher content of TiO inhibits the slag steel reaction 2 Is easy to combine with CaO to form CaTiO with high melting point 3 The casting powder has high crystallization rate, which affects the lubrication between the casting blank and the crystallizer wall, causes the surface quality deterioration of the casting blank and affects the fettling rate.
Patent CN108127094A discloses a non-reactive mold flux for high titanium steel, which comprises the following components in percentage by weight: caO 9-16%, al 2 O 3 15～30％、BaO20～32％、Li 2 O5～12％、MgO≤2％、F - 8～15％、TiO 2 4 to 10 percent and C2 to 12 percent, the balance of inevitable impurities, and the balance of (Na) in the impurities 2 O+K 2 O+SiO 2 ) Less than or equal to 3 percent. The crystallization rate of the covering slag is 80-100%, the lubricating capability of the covering slag is poor, and the covering slag is easy to stick in the continuous casting processThe phenomenon of nodular breakout leads to the termination of continuous casting.
Patent CN110315039A discloses an application of fluorine-free mold flux in titanium-containing steel continuous casting, and the components of the mold flux in percentage by weight are as follows: 30 to 45 percent of CaO and SiO 2 25～40％、Al 2 O 3 2～6％、(MgO+Na 2 O)8～15％、Li 2 O0～2％、B 2 O 3 4 to 8% and (Fe) 2 O 3 + MnO) 6-10%. In the mold flux (SiO) 2 +B 2 O 3 ) High content, serious slag steel reaction phenomenon and TiO generated by reaction 2 Combined with CaO in the covering slag to form CaTiO with high melting point 3 And the lubricating property of the mold flux is affected, so that the method is not suitable for high titanium steel.
Patent CN104399922A discloses a novel corrosion-resistant alloy steel continuous casting mold flux and application thereof, wherein the mold flux comprises the following components in percentage by weight: 17 to 25 percent of CaO and SiO 2 23～31％、Al 2 O 3 10～15％、MgO1～4％、(Na 2 O+Li 2 O)10～14％、B 2 O 3 1～8％、TiO 2 1 to 6 percent of BaO, 4 to 8 percent of BaO and F - 10 to 13 percent. In the mold flux (SiO) 2 +B 2 O 3 ) High content, and B in the covering slag 2 O 3 The content is more than 5 percent, although the glass property of the casting powder is increased, B in the casting powder 2 O 3 SiO 2 2 The protective slag is easier to react with Ti in steel, enhances the reaction of slag steel, and is suitable for titanium-containing steel with lower Ti content (0.1-0.3%).
In conclusion, the existing designs of the continuous casting mold flux have certain defects: the reactivity of the covering slag is high, and the burning loss of Ti element in the molten steel is serious; caO or TiO in the covering slag 2 High content and easy generation of high melting point CaTiO 3 Affecting the lubricating property of the mold flux. Up to now, there has not been disclosed a continuous casting mold flux that can solve the above-mentioned technical problems.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides a method for manufacturing a semiconductor deviceThe continuous casting covering slag containing rare earth oxide for high-titanium low-aluminum steel has the advantages that through designing the component formula and the proportion of the covering slag, all components in the covering slag have synergistic effect, the CaO content is reduced, and the high-melting-point CaTiO is inhibited 3 To reduce SiO 2 Content, inhibiting the performance deterioration of the casting powder caused by slag steel reaction; simultaneously adding a certain amount of low rare earth oxide Ce 2 O 3 And a small amount of TiO 2 The casting powder has good lubricating property and heat transfer capacity, the continuous casting process is smooth, and the number of continuous casting furnaces and the quality of casting blanks are improved.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
on one hand, the invention provides a continuous casting mold flux containing rare earth oxide for high-titanium low-aluminum steel, which comprises the following components in percentage by mass:
CaO18～23％、SiO 2 17～21％、Al 2 O 3 10～15％、MgO2～5％、Na 2 O8～12％、F - 4～7％、B 2 O 3 1～5％、TiO 2 1～4％、Ce 2 O 3 12 to 15 percent and C2 to 5 percent, and the balance of inevitable impurities.
According to a preferred embodiment of the present invention, the physical properties of the continuous casting mold flux satisfy: melting point: 1115 to 1200 ℃; viscosity at 1300 ℃: 0.15-0.30 Pa · s; crystallization rate: 20 to 33 percent.
According to the preferred embodiment of the present invention, caO and SiO 2 The weight ratio is 1.0-1.1. Within the proportion range, the covering slag can obtain proper alkalinity, and the covering slag has better Al absorption 2 O 3 、TiO 2 Capability of reducing the amount of CaO and inhibiting the high melting point of CaTiO 3 Forming; caO and SiO 2 The weight ratio is more than or equal to 1, and SiO is reduced 2 Activity of reaction (2).
According to a preferred embodiment of the invention, the continuous casting mold flux is used for producing high-titanium low-aluminum steel, wherein the mass fraction of Ti in the high-titanium low-aluminum steel is 0.8-1.2%, and the mass fraction of Al in the high-titanium low-aluminum steel is 0-0.2%.
The technical principle of the component formula of the continuous casting covering slag is as follows:
the content of CaO is controlled between 18 and 23 percent and is used for providing alkalinity to absorb impurities, and meanwhile, the content of CaO is low, and TiO is absorbed by the covering slag 2 Post-inhibition of CaTiO 3 And controlling the performance of the casting powder. SiO 2 2 The content of the casting powder is controlled to be 17-21%, and the casting powder is used as a network former, plays a key role in the casting powder, provides the glass property of the casting powder, and ensures the smooth running of the continuous casting process and the quality of casting blanks. Lowering SiO 2 Can reduce SiO 2 The activity of the alloy, the burning loss of Ti is reduced, and the performance deterioration of the casting powder caused by slag steel reaction is inhibited. Adding a small amount of TiO 2 And 12 to 15% of Ce 2 O 3 On the one hand, siO can be reduced 2 Activity of inhibiting Ti in steel and SiO in casting powder 2 Reaction, reducing slag-steel reaction and reducing burning loss of Ti; on the other hand, the alkalinity is partially provided instead of CaO, so that the problem caused by the reduction of calcium oxide is solved. Na in the mold flux 2 O is favorable for reducing SiO 2 Activity. A small amount of B is added into the casting powder 2 O 3 The crystallization rate of the covering slag is reduced, and the lubricating capacity of the covering slag is increased.
Preferably, B 2 O 3 The content of the casting powder is 1.65-4.21%. Preferably, tiO 2 The content of the casting powder is 1.55 to 3.23 percent. Preferably, ce 2 O 3 The content of the casting powder is 12.25-14.26%. Preferably, the content of MgO in the mold flux is 2.27 to 4.30%. Preferably, the content of C in the mold flux is 2.78-4.12%. Preferably, F - The content of the casting powder is 4.54-6.08%. Preferably, na 2 The content of O in the casting powder is 8.63-11.31%. Preferably, siO 2 The content of the casting powder is 17.33-20.63%. Preferably, the content of CaO in the mold flux is 18.77 to 22.51%. Preferably, al 2 O 3 The content of the casting powder is 10.32-14.43%.
On the other hand, the invention also provides a preparation method of the continuous casting mold flux containing the rare earth oxide for the high-titanium low-aluminum steel, which comprises the following steps:
s1, taking limestone, quartz sand, bauxite, magnesia, sodium carbonate, fluorite, boric anhydride, titanium dioxide, ceria and carbonaceous materials as raw materials, calculating the use amount of each raw material according to the percentage content of the components of the protective slag in the scheme, and weighing each raw material according to the use amount;
s2, mixing and heating limestone, quartz sand, bauxite, magnesia, sodium carbonate, part of fluorite (15-20 percent of the total amount of the fluorite), boric anhydride, titanium dioxide and ceria weighed in the S1, adding the rest fluorite when the temperature reaches 1250-1300 ℃, and preserving the heat for 30-40 min; after all the raw materials are melted uniformly, naturally cooling the raw materials in a furnace to obtain a glass-state pre-melted material;
s3, crushing the pre-melted material to a particle size of less than or equal to 1mm, adding a required amount of carbonaceous material, adding water and a binder into a refiner, and finely grinding for 30-60 min to prepare slurry;
and S4, feeding the slurry into a spray particle drying tower for drying and granulating to obtain the rare earth-containing continuous casting mold flux for the high-titanium low-aluminum steel.
Preferably, each raw material meets the following requirements: limestone: caCO 3 More than 95 percent; quartz sand: siO 2 2 More than 95 percent; bauxite: al (aluminum) 2 O 3 ＞75％，SiO 2 Less than 4 percent; magnesia: mgO > 85%, siO 2 ＜6％，Al 2 O 3 Less than 2 percent; sodium carbonate: na (Na) 2 CO 3 More than 95 percent; fluorite: caF 2 88～90％，SiO 2 Less than 6.0 percent and S less than 0.05 percent; boric anhydride: b is 2 O 3 More than 95 percent; titanium dioxide: tiO 2 2 More than 98 percent; ceria: ce 2 O 3 More than 99 percent; carbonaceous material: c is more than 95 percent.
Preferably, in S4, drying and granulating in a spray particle drying tower to obtain the rare earth-containing continuous casting mold flux for the high-titanium low-aluminum steel, wherein the water content is less than or equal to 0.5%, and the particle size is 0.1-1.2 mm (more than or equal to 80%).
(III) advantageous effects
The rare earth oxide-containing continuous casting protective slag for high-titanium low-aluminum steel can effectively control the slag steel reaction and absorb Al 2 O 3 、TiO 2 And inclusions such as TiN. In the continuous casting process, the mold fluxThe casting blank has good fluidity and normal slag consumption, greatly reduces the defects of longitudinal cracks, impurity slag inclusion and the like of the casting blank, and obviously improves the quality and the production benefit of the casting blank.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail below with reference to specific embodiments.
The invention provides a rare earth oxide-containing continuous casting mold flux for high-titanium low-aluminum steel, which comprises the following components in percentage by weight: 18 to 23 percent of CaO and SiO 2 17～21％、Al 2 O 3 10～15％、MgO2～5％、Na 2 O8～12％、F - 4～7％、B 2 O 3 1～5％、TiO 2 1～4％、Ce 2 O 3 12 to 15 percent and C2 to 5 percent, and the balance of inevitable impurities.
The preparation method of the continuous casting mold flux containing the rare earth comprises the following steps:
(1) Taking limestone, quartz sand, bauxite, magnesia, sodium carbonate, fluorite, boric anhydride, titanium dioxide, ceria and carbonaceous materials as raw materials, calculating the using amount of each raw material according to the weight percentage of the covering slag, weighing each raw material according to the calculated using amount, and selecting the raw materials which meet the following requirements in weight percentage:
limestone: caCO 3 More than 95 percent; quartz sand: siO 2 2 More than 95 percent; bauxite: al (Al) 2 O 3 ＞75％，SiO 2 Less than 4 percent; magnesia: mgO > 85%, siO 2 ＜6％，Al 2 O 3 Less than 2 percent; sodium carbonate: na (Na) 2 CO 3 More than 95 percent; fluorite: caF 2 88～90％，SiO 2 Less than 6.0 percent and S less than 0.05 percent; boric anhydride: b is 2 O 3 More than 95 percent; titanium dioxide: tiO 2 2 More than 98 percent; ceria: ce 2 O 3 More than 99 percent; carbonaceous material: c is more than 95 percent.
(2) Mixing the limestone, quartz sand, bauxite, magnesia, sodium carbonate, fluorite (15-20 percent of the total amount of the fluorite), boric anhydride, titanium dioxide and ceria weighed in the step (1), putting the mixture into an ore-smelting furnace for heating, adding the rest fluorite when the temperature reaches 1250-1300 ℃, and finally preserving the heat in the ore-smelting furnace for 30-40 min. After the raw materials are melted uniformly, the furnace is naturally cooled to obtain the glass-state pre-melting material.
(3) Crushing the pre-melted material to a particle size of less than or equal to 1mm, adding a required amount of carbonaceous material, then adding water and a binder into a refiner, and finely grinding for 30-60 min to prepare slurry.
(4) And (3) feeding the slurry into a spray particle drying tower for drying and granulating to obtain the rare earth-containing continuous casting covering slag for the high-titanium low-aluminum steel, wherein the water content is less than or equal to 0.5%, and the granularity is 0.1-1.2 mm (more than or equal to 80%).
According to the above preparation methods, the continuous casting mold fluxes of the following examples 1 to 4 were obtained, respectively.
TABLE 1 composition and Main physicochemical Properties of continuous casting powder for examples 1 to 4
As can be seen from the above Table 1, the mold flux of the present invention has reasonable melting point, viscosity and crystallization rate, and can provide the mold flux with good lubricating effect in the mold.
The mold flux of example 1 in table 1 above was applied to steel grades of Ti =0.99%, al =0.08%, the mold flux of example 2 was applied to steel grades of Ti =0.98%, al =0.12%, the mold flux of example 3 was applied to steel grades of Ti =1.13%, al =0.16%, and the mold flux of example 4 was applied to steel grades of Ti =0.94%, al = 0.10%. The casting temperature is 1425-1440 ℃, and the pulling speed is 0.50.4-0.6 m/min.
The results show that: the casting powder steel slag interface solid condensate of the embodiment 1-4 is few, the surface quality of the casting blank is good, a large amount of slag inclusion is not found, the surface quality and the subcutaneous quality of the casting blank are good, the whole continuous casting is carried out smoothly, the number of continuous casting furnaces is more than or equal to 3, and the original qualified rate of the casting blank reaches more than 90%. The average grinding amount of the casting blank in example 1 is 8.7%, the average grinding amount of the casting blank in example 2 is 9.6%, the average grinding amount of the casting blank in example 3 is 8.6%, the average grinding amount of the casting blank in example 4 is 9.0%, and the average grinding amount of the casting blank is reduced by more than 83% compared with the conventional casting powder. The components of Ti and Al in the casting blank are qualified and meet the element content of steel grade, wherein the burning loss rate of Ti is respectively 12.50%, 15.29%, 14.14% and 14.63%; the burning loss rates of Al were 14.29%, 9.09%, 6.67% and 11.11%, respectively.
The following table 2 shows the contents and physical and chemical properties of the components of the mold flux in comparative examples 1 to 4. Wherein comparative examples 1 and 2 do not contain Ce 2 O 3 Ce of comparative examples 3 and 4 2 O 3 23.12 percent and 22.30 percent of the covering slag.
TABLE 2 composition and main physical and chemical properties of continuous casting powder for comparative examples 1 to 4
As can be seen from table 2 above, the mold flux of comparative examples 1 and 2 has reasonable melting point, viscosity, and crystallization rate, and the mold flux can have good lubricating effect in the mold. To verify the performance of the comparative example mold flux, the mold flux of comparative example 1 was further applied to a steel grade of Ti =0.95% and Al =0.08%, the mold flux of comparative example 2 was applied to a steel grade of Ti =1.00% and Al =0.09%, the mold flux of comparative example 3 was applied to a steel grade of Ti =1.08% and Al =0.17%, and the mold flux of comparative example 4 was applied to a steel grade of Ti =1.08% and Al = 0.18%. The casting temperature is 1425-1440 ℃, and the pulling speed is 0.4-0.6 m/min.
The results show that: the mold flux of comparative examples 1 and 2 was good in surface quality of a cast slab during casting, no large amount of slag inclusion was found, surface quality and subcutaneous quality of the cast slab were good, the whole continuous casting proceeded, and the number of continuous casting furnaces was 2. The average thinning amount of the casting blank of comparative example 1 is 6.2%, and the average thinning amount of the casting blank of comparative example 2 is 8.6%. However, the Ti content in the casting blank is unqualified, and the burning loss rate is respectively 35.71 percent and 35.14 percent. Furthermore, it was found through experiments that when Ce is contained in the mold flux 2 O 3 The content is less than 12 percentIn the process, the burning loss rate of Ti in the casting blank is still high, and the control cannot be carried out to an ideal degree suitable for practical application.
In the casting process of the mold flux of comparative examples 3 and 4, the slag ring appeared to be large, the fluctuation of the liquid level of the mold was large, and continuous casting was impossible. Longitudinal cracks appear on the surface of the casting blank, and a certain slag inclusion phenomenon exists at the same time. The average thinning amount of the casting blank of comparative example 3 is 25.3%, the average thinning amount of the casting blank of example 4 is 21.5%,
it can be seen that when Ce is absent from the mold flux 2 O 3 When in use, the CaO and the SiO in the slag system are simply reduced 2 When the amount of the alloy is used, the phenomenon of serious element burning loss exists, and the components of a casting blank are unqualified and cannot be accepted. When Ce is present 2 O 3 When the content of the casting powder is too high, the problems of poor surface quality and high grinding amount of a casting blank exist, and the production cost is increased.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The rare earth oxide-containing continuous casting mold flux for the high-titanium low-aluminum steel is characterized by comprising the following components in percentage by mass:
CaO 18～23％、SiO 2 17～21％、Al 2 O 3 10～15％、MgO 2～5％、Na 2 O 8～12％、F - 4～7％、B 2 O 3 1～5％、TiO 2 1～4％、Ce 2 O 3 12-15% and C2-5%, the rest is inevitable impurities; among them, caO and SiO 2 The weight ratio is 1.0-1.1;
the continuous casting mold flux is used for producing high-titanium low-aluminum steel, wherein the mass fraction of Ti in the high-titanium low-aluminum steel is 0.8-1.2%, and the mass fraction of Al in the high-titanium low-aluminum steel is 0-0.2%.
2. The continuous casting mold flux according to claim 1, wherein physical properties of the continuous casting mold flux satisfy: melting point: 1115 to 1200 ℃; viscosity at 1300 ℃: 0.15-0.30 Pa · S; the crystallization rate is as follows: 20 to 33 percent.
3. The continuous casting mold flux according to claim 1, wherein B is B 2 O 3 The content of the casting powder is 1.65 to 4.21 percent; tiO 2 2 The content of the casting powder is 1.55 to 3.23 percent; ce 2 O 3 The content of the casting powder is 12.25 to 14.26 percent; siO 2 2 The content of the casting powder is 17.33-20.63%; the content of CaO in the casting powder is 18.77-22.51%.
4. A preparation method of rare earth oxide-containing continuous casting mold flux for high-titanium low-aluminum steel is characterized by comprising the following steps:
s1, taking limestone, quartz sand, bauxite, magnesia, sodium carbonate, fluorite, boric anhydride, titanium dioxide, ceria and carbonaceous materials as raw materials, calculating the use amount of each raw material according to the component percentage content of the continuous casting protective slag in claim 1, and weighing each raw material according to the use amount;
s2, mixing and heating the limestone, the quartz sand, the bauxite, the magnesia, the sodium carbonate, part of fluorite, boric anhydride, the titanium dioxide and the ceria weighed in the S1, adding the rest fluorite when the temperature reaches 1250-1300 ℃, and preserving the heat for 30-40 min; after the raw materials are melted uniformly, naturally cooling the raw materials in a furnace to obtain a glass state pre-melted material;
s3, crushing the pre-melted material to the particle size of less than or equal to 1mm, adding a required amount of carbonaceous material, then adding water and a binder into a refiner, and finely grinding for 30-60 min to prepare slurry;
and S4, feeding the slurry into a spray particle drying tower for drying and granulating to obtain the continuous casting mold flux containing the rare earth oxide for the high-titanium low-aluminum steel.
5. The method according to claim 4, wherein each raw material satisfies the following requirements: limestone: caCO 3 More than 95 percent; quartz sand: siO 2 2 More than 95 percent; bauxite: al (Al) 2 O 3 ＞75％，SiO 2 Less than 4 percent; magnesia: mgO > 85%, siO 2 ＜6％，Al 2 O 3 Less than 2 percent; sodium carbonate: na (Na) 2 CO 3 More than 95 percent; fluorite: caF 2 88～90％，SiO 2 Less than 6.0 percent and S less than 0.05 percent; boric anhydride: b 2 O 3 More than 95 percent; titanium dioxide: tiO 2 2 More than 98 percent; ceria: ce 2 O 3 More than 99 percent; carbonaceous material: c is more than 95 percent.
6. The preparation method according to claim 4, wherein in S4, the continuous casting mold flux containing the rare earth oxide for the high titanium low aluminum steel is obtained by drying and granulating in a spray granule drying tower to obtain granules with the water content of less than or equal to 0.5% and the mass ratio of the granules with the granularity of 0.1-1.2 mm of more than 80%.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332497A (en) * | 2007-06-25 | 2008-12-31 | 宝山钢铁股份有限公司 | Continuous casting protection slag for high-alumina steel and manufacture method thereof |
| CN105834383A (en) * | 2016-06-16 | 2016-08-10 | 东北大学 | Casting powder for aluminate series crystallizer for rare earth heat resistant steel continuous casting and preparing method of casting powder |
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| MX2009012811A (en) * | 2008-11-25 | 2010-05-26 | Maverick Tube Llc | Compact strip or thin slab processing of boron/titanium steels. |
| CN104399922A (en) * | 2014-11-28 | 2015-03-11 | 中南大学 | Novel corrosion-resistant alloy steel continuous casting powder and application thereof |
| CN104550797B (en) * | 2015-01-13 | 2016-08-31 | 东北大学 | A kind of hypoergia crystallizer protecting residue of rare earth steel continuous casting |
| CN105642849A (en) * | 2016-02-25 | 2016-06-08 | 唐山市鑫焱昌科技有限公司 | Crystallizer casting powder for continuous casting of titanium-containing steel |
| JP6809256B2 (en) * | 2017-01-30 | 2021-01-06 | 日本製鉄株式会社 | Mold powder for continuous casting |
| CN110614351B (en) * | 2019-10-30 | 2021-05-18 | 江苏理工学院 | Continuous casting covering slag for stainless steel and preparation method thereof |
| CN111531140B (en) * | 2020-05-22 | 2022-05-24 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium oxide continuous casting covering slag for titanium-containing steel |
-
2021
- 2021-11-15 CN CN202111350790.2A patent/CN114029462B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332497A (en) * | 2007-06-25 | 2008-12-31 | 宝山钢铁股份有限公司 | Continuous casting protection slag for high-alumina steel and manufacture method thereof |
| CN105834383A (en) * | 2016-06-16 | 2016-08-10 | 东北大学 | Casting powder for aluminate series crystallizer for rare earth heat resistant steel continuous casting and preparing method of casting powder |
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