CN115156492A - A kind of tundish covering agent and its adding method in the continuous casting process of high-clean steel IF steel - Google Patents
A kind of tundish covering agent and its adding method in the continuous casting process of high-clean steel IF steel Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009749 continuous casting Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 20
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 8
- 229910004261 CaF 2 Inorganic materials 0.000 claims abstract description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 7
- 230000004048 modification Effects 0.000 claims description 11
- 238000012986 modification Methods 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 76
- 238000001179 sorption measurement Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910018068 Li 2 O Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000006184 cosolvent Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
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Abstract
Description
技术领域technical field
本发明属于冶金技术领域，具体涉及一种高洁净钢IF钢连铸过程中间包覆盖剂及其加入方法。The invention belongs to the technical field of metallurgy, and in particular relates to a tundish covering agent and an adding method in the continuous casting process of high-clean steel IF steel.
背景技术Background technique
IF钢又称为无间隙原子钢，碳含量0.002％～0.006％，具有优良的深冲性能，被广泛用于制造汽车与家电面板等。为达到面板表面质量要求，需严格控制IF钢纯净度，避免钢中夹杂物在轧制过程形成的条痕等面板表面质量缺陷。IF steel, also known as interstitial-free steel, has a carbon content of 0.002% to 0.006%, and has excellent deep-drawing properties, and is widely used in the manufacture of automotive and home appliance panels. In order to meet the surface quality requirements of the panel, it is necessary to strictly control the purity of IF steel to avoid surface quality defects such as streaks formed by inclusions in the steel during the rolling process.
IF钢连铸过程中，中间包作为连铸机关键冶金容器，对提高钢水纯净度起到了关键作用。其中，中间包覆盖剂在连铸过程中起到了保温、隔绝空气、吸附夹杂的重要作用。因此，合理的中包覆盖剂可有效降低钢水二次氧化，提高钢水中夹杂物上浮进入中包覆盖剂效率，改善钢水纯净度。In the process of IF steel continuous casting, the tundish, as the key metallurgical container of the continuous casting machine, plays a key role in improving the purity of molten steel. Among them, the tundish covering agent plays an important role in heat preservation, isolation of air and adsorption of inclusions in the continuous casting process. Therefore, a reasonable middle bag covering agent can effectively reduce the secondary oxidation of molten steel, improve the efficiency of inclusions in the molten steel floating into the middle bag covering agent, and improve the purity of the molten steel.
覆盖剂通常可分为酸性、中性、碱性三类，酸性覆盖剂的碱度R(CaO/SiO2)<0.5，中性覆盖剂R＝0.5～1.5，碱性覆盖剂R>1.5。碱性覆盖剂与其它类型覆盖剂相比优势明显：①增大中包覆盖剂对钢水中Al2O3、SiO2类夹杂物的吸附去除能力；②减少中包耐材侵蚀；③降低中包钢水回硫；④降低中包覆盖剂氧化性。因此，当前普遍使用的中包覆盖剂大部分属于碱性覆盖剂，如专利CN101347823A、CN103372636A、CN103639383A、CN104858381A、CN106041007A、CN107052289A、CN111001768B。Covering agents can usually be divided into three categories: acidic, neutral and alkaline. The alkalinity of acidic covering agents R(CaO/SiO2)<0.5, neutral covering agents R=0.5～1.5, and alkaline covering agents R>1.5. Compared with other types of covering agents, alkaline covering agents have obvious advantages: ①Increase the adsorption and removal capacity of Al 2 O 3 and SiO 2 inclusions in molten steel; ② Reduce the erosion of tundish refractory materials; Sulfur in the molten steel; ④Reduce the oxidizing property of the tundish covering agent. Therefore, most of the currently commonly used middle-package covering agents are alkaline covering agents, such as patents CN101347823A, CN103372636A, CN103639383A, CN104858381A, CN106041007A, CN107052289A, CN111001768B.
虽然当前普遍采用的碱性覆盖剂可基本满足生产需求，但在生产IF钢这种纯净度要求严格的钢种时仍存在一定的不足：①目前碱性覆盖剂碱度R通常小于10，其对夹杂物的吸附去除能力有限；②当前采用的覆盖剂通常在中包开浇第一炉完成添加，后续生产过程很少再添加覆盖剂。然而，在后续炉次浇铸过程中，随着钢水中夹杂物上浮进入中包覆盖剂，中包覆盖剂的性能会发生明显变化，导致覆盖剂吸附夹杂能力显著降低，从而不利于后续炉次钢水夹杂物的上浮去除。Although the currently commonly used alkaline covering agents can basically meet the production needs, there are still certain deficiencies in the production of IF steel with strict purity requirements: ① At present, the basicity R of the alkaline covering agent is usually less than 10, and its The adsorption and removal ability of inclusions is limited; ②The currently used covering agent is usually added in the first furnace of the tundish casting, and the covering agent is rarely added in the subsequent production process. However, in the casting process of the subsequent heats, as the inclusions in the molten steel float into the tundish covering agent, the performance of the tundish covering agent will change significantly, resulting in a significant decrease in the ability of the covering agent to absorb inclusions, which is not conducive to the subsequent heats of molten steel Floating removal of inclusions.
发明内容SUMMARY OF THE INVENTION
为解决上述技术问题，为有效改善IF钢生产过程钢水纯净度，本发明提供了一种高洁净钢IF钢连铸过程的中间包覆盖剂及其加入方法，可在有效发挥覆盖剂保温与避免钢水与空气接触发生二次氧化等基本作用基础上，有效提高中间包覆盖剂对IF钢Al2O3等夹杂物吸附去除能力，显著提高钢水纯净度，使用中降低汽车板夹杂降级率。In order to solve the above technical problems and effectively improve the purity of molten steel in the production process of IF steel, the present invention provides a tundish covering agent in the continuous casting process of high-clean steel IF steel and a method for adding the same, which can effectively play the role of the covering agent in heat preservation and avoidance. Based on the basic effects of secondary oxidation of molten steel in contact with air, it can effectively improve the ability of tundish covering agent to adsorb and remove inclusions such as Al 2 O 3 in IF steel, significantly improve the purity of molten steel, and reduce the degradation rate of inclusions in automobile plates during use.
为实现上述发明目的，本发明采用以下技术方案：In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:
本发明一方面提供了一种IF钢连铸中间包初始覆盖剂，以质量分数计，包括以下组分：One aspect of the present invention provides an initial covering agent for an IF steel continuous casting tundish, in terms of mass fraction, comprising the following components:
CaO：40.0～50.0％，BaO：10.0～12.0％，MgO：11.0～15.0％，SiO2：2～4％，Al2O3：20.0～24.0％，Li2CO3：1.0～3.0％，CaF2：0.8～1.2％，FeO+MnO：<1.0％，C：<1.0％，H2O：<0.5％，余量为不可避免杂质。CaO: 40.0-50.0%, BaO: 10.0-12.0%, MgO: 11.0-15.0%, SiO 2 : 2-4%, Al 2 O 3 : 20.0-24.0%, Li 2 CO 3 : 1.0-3.0%, CaF 2 : 0.8-1.2%, FeO+MnO: <1.0%, C: <1.0%, H 2 O: <0.5%, and the balance is unavoidable impurities.
上述技术方案中，进一步地，所述初始覆盖剂的熔点为1200～1400℃。In the above technical solution, further, the melting point of the initial covering agent is 1200-1400°C.
上述技术方案中，进一步地，所述初始覆盖剂的粒度≤3mm。In the above technical solution, further, the particle size of the initial covering agent is less than or equal to 3 mm.
上述技术方案中，进一步地，所述初始覆盖剂的碱度R为15～20。In the above technical solution, further, the basicity R of the initial covering agent is 15-20.
本发明另一方面提供了一种IF钢连铸中间包改质覆盖剂，以质量分数计，包括以下组分：Another aspect of the present invention provides an IF steel continuous casting tundish modifying and covering agent, in terms of mass fraction, comprising the following components:
CaO：62.0～72.0％，BaO：6.0～10.0％，MgO：6.0～10.0％，SiO2：1.0～3.0％，Al2O3：5.0～9.0％，Li2CO3：3.0～5.0％，CaF2：1.8～2.2％，FeO+MnO：<1.0％，C：<1.0％，H2O：<0.5％，余量为不可避免杂质。CaO: 62.0-72.0%, BaO: 6.0-10.0%, MgO: 6.0-10.0%, SiO 2 : 1.0-3.0%, Al 2 O 3 : 5.0-9.0%, Li 2 CO 3 : 3.0-5.0%, CaF 2 : 1.8-2.2%, FeO+MnO: <1.0%, C: <1.0%, H 2 O: <0.5%, and the balance is unavoidable impurities.
上述技术方案中，进一步地，所述改质覆盖剂的熔点为1400～1600℃。In the above technical solution, further, the melting point of the modified covering agent is 1400-1600°C.
上述技术方案中，进一步地，所述改质覆盖剂的粒度≤5mm。In the above technical solution, further, the particle size of the modified covering agent is less than or equal to 5 mm.
上述技术方案中，进一步地，所述改质覆盖剂的碱度R为30～38。In the above technical solution, further, the basicity R of the modified covering agent is 30-38.
本发明还提供了一种IF钢连铸中间包覆盖剂的加入方法，所述方法为：The present invention also provides a method for adding IF steel continuous casting tundish covering agent, the method is:
中间包浇铸初期(即开浇第一炉)，钢水达到中间包工作液位时，加入前述固态中间包初始覆盖剂；在中间包浇铸中期(即中间包连浇约一半的炉数时)，加入前述熔融的中间包改质覆盖剂。In the early stage of tundish casting (that is, the first furnace is poured), when the molten steel reaches the working level of the tundish, the aforementioned solid tundish initial covering agent is added; Add the melted tundish modification covering agent described above.
上述技术方案中，进一步地，所述中间包初始覆盖剂的加入量为：中间包初始覆盖剂融化后，在钢水表面均匀铺展的厚度为10～15mm；In the above technical solution, further, the added amount of the tundish initial covering agent is: after the tundish initial covering agent is melted, the thickness uniformly spread on the molten steel surface is 10-15 mm;
所述中间包改质覆盖剂的加入量为初始覆盖剂加入量的1/3～1/2。The added amount of the tundish modified covering agent is 1/3-1/2 of the added amount of the initial covering agent.
上述技术方案中，进一步地，所述中间包初始覆盖剂和中间包改质覆盖剂加入的位置均为中间包冲击区与浇铸区。In the above technical solution, further, the locations where the tundish initial covering agent and the tundish modified covering agent are added are both the tundish impact zone and the casting zone.
与现有技术相比，本发明的有益效果：Compared with the prior art, the beneficial effects of the present invention:
(1)本发明以BaO代替部分CaO，覆盖剂碱性增强，初始覆盖剂碱度R达到10以上的超高碱度，显著提高了其吸附夹杂能力。(1) In the present invention, BaO is used to replace part of CaO, the alkalinity of the covering agent is enhanced, and the initial alkalinity R of the covering agent reaches an ultra-high alkalinity of more than 10, which significantly improves its adsorption and inclusion capacity.
(2)本发明为有效降低超高碱度条件下的初始覆盖剂熔点，保障初始覆盖剂加入中间包后的化渣性能，同时提高初始覆盖剂加入中间包后的铺展性能，采用Li2CO3代替部分传统的助溶剂CaF2。Li2CO3在高温下分解生成Li2O与CO2，Li2O作为强助溶剂可有效降低超高碱度初始覆盖剂的熔点，同时分解产生的CO2有助于推动加入中间包的覆盖剂铺展，改善其对钢水的快速覆盖效果。(2) In the present invention, in order to effectively reduce the melting point of the initial covering agent under the condition of ultra-high alkalinity, ensure the slagging performance after the initial covering agent is added to the tundish, and at the same time improve the spreading performance of the initial covering agent after adding the tundish, Li 2 CO 3 to replace part of the traditional co-solvent CaF 2 . Li 2 CO 3 decomposes at high temperature to form Li 2 O and CO 2 . As a strong co-solvent, Li 2 O can effectively reduce the melting point of the ultra-high basicity initial covering agent. The covering agent spreads to improve its rapid covering effect on molten steel.
(3)本发明在中间包开浇第一炉加入一定量的初始固态覆盖剂，高效率吸附去除中间包浇铸前期钢水夹杂物，在浇铸一定炉数后的中间包浇铸中期，加入熔融的液态中间包改质覆盖剂，有效改善了中间包浇铸中期初渣因大量吸附夹杂而导致的性能恶化，从而继续维持其较高的夹杂吸附能力。(3) In the present invention, a certain amount of initial solid covering agent is added to the first tundish casting furnace, and the molten steel inclusions in the early stage of tundish casting are removed by high-efficiency adsorption. In the middle stage of tundish casting after casting a certain number of furnaces, the molten liquid state is added. The tundish modification covering agent can effectively improve the performance deterioration of the initial slag due to a large number of adsorption inclusions in the middle of the tundish casting, so as to continue to maintain its high inclusion adsorption capacity.
具体实施方式Detailed ways
以下结合具体实施例对本发明作进一步说明，但不以任何方式限制本发明。The present invention is further described below in conjunction with specific embodiments, but does not limit the present invention in any way.
以两流70吨中间包连浇4个包次(每个包次6炉)高洁净度IF钢为例，第1个包次采用现有覆盖剂，后续3个包次采用本发明公开的覆盖剂，具体为：Taking two-stream 70-ton tundish pouring 4 times of high cleanliness IF steel continuously (6 heats per bag time) as an example, the existing covering agent is used for the first bag time, and the disclosed coating agent is used for the subsequent 3 times. Covering agent, specifically:
(1)第1个包次开浇第一炉，中包钢水达到中包工作液位900mm时，通过包盖的烘烤孔向中间包冲击区加入420kg现有覆盖剂，两侧浇铸区各加入290kg的现有覆盖剂，冲击区与两侧浇铸区均匀铺展开的熔融覆盖剂厚度约12mm，现有覆盖剂成分及性能如表1所示，后续炉次不再加入覆盖剂。(1) The first furnace is poured for the first tundish. When the molten steel in the tundish reaches 900mm of the working liquid level of the tundish, add 420kg of the existing covering agent to the impact zone of the tundish through the baking hole of the lid. 290kg of the existing covering agent was added to each, and the thickness of the molten covering agent spread evenly in the impact area and the casting areas on both sides was about 12mm.
表1第1个包次加入的现有覆盖剂的成分(wt％)及性能Table 1 Composition (wt%) and properties of the existing covering agent added in the first package
(2)第2～第4个包次，每个包次开浇第一炉，中包钢水达到中包工作液位900mm时，通过包盖的烘烤孔向中间包冲击区加入300kg本发明初始覆盖剂，两侧浇铸区各加入200kg的本发明初始覆盖剂，冲击区与两侧浇铸区均匀铺展开的熔融覆盖剂厚度约12mm，每个包次加入的本发明初始覆盖剂成分及性能分别如表2～表4所示。(2) For the 2nd to 4th batches, the first furnace is poured for each bag, and when the molten steel in the tundish reaches 900mm of the working liquid level of the tundish, 300kg of molten steel is added to the impact area of the tundish through the baking hole of the cover. The initial covering agent of the invention, 200kg of the initial covering agent of the present invention is added to each of the casting areas on both sides, the thickness of the molten covering agent spread evenly in the impact area and the casting areas on both sides is about 12 mm, and the components of the initial covering agent added in each package and The properties are shown in Tables 2 to 4, respectively.
表2第2个包次加入的本发明初始覆盖剂的成分(wt％)及性能Table 2 Composition (wt%) and properties of the initial covering agent of the present invention added in the second package
表3第3个包次加入的本发明初始覆盖剂的成分(wt％)及性能Table 3 Composition (wt%) and properties of the initial covering agent of the present invention added in the third package
表4第4个包次加入的本发明初始覆盖剂的成分(wt％)及性能Table 4 Composition (wt%) and properties of the initial covering agent of the present invention added in the fourth package
(3)第2～第4个包次，每个包次浇铸过程中，采用感应炉将300kg中包改质覆盖剂在1600℃条件下熔融，第2～第4个包次改质覆盖剂的成分及性能分别如表5～表7所示。(3) For the 2nd to the 4th bag, during the casting process of each bag, use an induction furnace to melt 300kg of the modified covering agent in the middle bag at 1600 ℃, and the second to the fourth bag of the modified covering agent The components and properties of the products are shown in Tables 5 and 7, respectively.
表5第2个包次中间包改质覆盖剂成分(wt％)及性能Table 5 Composition (wt%) and properties of modified covering agent in the second tundish
表6第3个包次中间包改质覆盖剂成分(wt％)及性能Table 6 Composition (wt%) and properties of modified covering agent in the third tundish
表7第3个包次中间包改质覆盖剂成分(wt％)及性能Table 7 Composition (wt%) and properties of modified covering agent in the third tundish
(4)第2～第4个包次，每个包次开浇第4炉，当中间包液位回复至工作液位1600mm时，将熔融的中间包改质覆盖剂通过包盖烘烤孔加入到中间包，其中冲击区加入120kg熔融改质覆盖剂，两侧的浇铸区各加入90kg的熔融改质覆盖剂。(4) For the 2nd to the 4th package, the 4th furnace is poured for each package. When the liquid level of the tundish returns to the working level of 1600mm, the molten tundish modification covering agent is passed through the baking hole of the cover. Add it to the tundish, in which 120kg of melted and modified covering agent is added to the impact zone, and 90kg of melted and modified covering agent is added to each of the casting zones on both sides.
表8对比了本发明公开的覆盖剂应用前(第1个包次)及应用后(第2～第4个包次)的工艺效果。与现有的覆盖剂相比，采用本发明覆盖剂后，中间包钢水增氮由1.5×10-6降低至0.9×10-6～1×10-6，说明本发明的覆盖剂在隔绝空气，保护钢水避免二次氧化效果上有明显提高。铸坯全氧由10×10-6下降至8.2×10-6～9×10-6，铸坯夹杂物密度由4.1个/mm2降低至3.1～3.5个/mm2，说明本发明的覆盖剂对钢水中的夹杂吸附去除效率得到增强。浇铸过程中，中间包每炉钢水的平均温降由8℃下降至7～7.4℃，说明本发明覆盖剂的保温效果得到改善。Table 8 compares the process effects of the covering agent disclosed in the present invention before application (the first package time) and after application (the second to the fourth package time). Compared with the existing covering agent, after using the covering agent of the present invention, the nitrogen increase of the molten steel in the tundish is reduced from 1.5×10 -6 to 0.9×10 -6 to 1×10 -6 , indicating that the covering agent of the present invention is effective in isolating The effect of protecting molten steel from secondary oxidation has been significantly improved. The total oxygen of the slab is reduced from 10×10 -6 to 8.2×10 -6 to 9×10 -6 , and the density of inclusions in the slab is reduced from 4.1/mm 2 to 3.1-3.5/mm 2 , which shows the coverage of the present invention. The adsorption and removal efficiency of impurities in molten steel was enhanced. During the casting process, the average temperature drop of the molten steel in each heat of the tundish drops from 8°C to 7-7.4°C, indicating that the thermal insulation effect of the covering agent of the present invention is improved.
表8高洁净度IF钢中间包覆盖剂应用前后效果对比Table 8 Comparison of effects before and after application of high cleanliness IF steel tundish covering agent
对于任何熟悉本领域的技术人员而言，在不脱离本发明技术方案范围情况下，都可利用上述揭示的技术内容对本发明技术方案作出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均应仍属于本发明技术方案保护的范围内。For any person skilled in the art, without departing from the scope of the technical solution of the present invention, many possible changes and modifications can be made to the technical solution of the present invention by using the technical content disclosed above, or modified into equivalents of equivalent changes. Example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention should still fall within the protection scope of the technical solutions of the present invention.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116891957A (en) * | 2023-08-17 | 2023-10-17 | 江西省科学院应用物理研究所 | Covering agent for smelting carbonless heating copper-iron alloy and preparation method thereof |
| CN118847937A (en) * | 2024-09-23 | 2024-10-29 | 鞍钢股份有限公司 | A continuous casting steel tundish covering agent modifier and its preparation and use method |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204864A (en) * | 1978-04-19 | 1980-05-27 | Scm Corporation | Particulate slagging composition for the continuous casting of steel |
| US4624707A (en) * | 1985-10-11 | 1986-11-25 | Bethlehem Steel Corporation | Continuous casting slag |
| US4988376A (en) * | 1989-08-02 | 1991-01-29 | Western Research Institute | Glassification of lead and silica solid waste |
| JPH04274866A (en) * | 1991-03-02 | 1992-09-30 | Kobe Steel Ltd | Flux for adding in tundish |
| JPH05318087A (en) * | 1991-12-27 | 1993-12-03 | Sumitomo Metal Ind Ltd | Casting mold additive |
| JPH10339928A (en) * | 1997-06-06 | 1998-12-22 | Fuji Photo Film Co Ltd | Heat developable photographic material |
| WO2007013235A1 (en) * | 2005-07-29 | 2007-02-01 | Asahi Glass Company, Limited | Glass plate with protective film |
| JP2007290023A (en) * | 2006-04-27 | 2007-11-08 | Shinagawa Refract Co Ltd | Heat insulating material for molten metal vessel |
| CN101760585A (en) * | 2010-02-03 | 2010-06-30 | 衡阳华菱连轧管有限公司 | Deep-desulphurizing slag system containing BaO and Li2O and method for producing ultralow-sulfur steel by adopting same |
| CN104707959A (en) * | 2013-12-11 | 2015-06-17 | 宝山钢铁股份有限公司 | Continuous casting mold flux for automobile sheet |
| CN105562641A (en) * | 2016-01-27 | 2016-05-11 | 重庆大学 | Crystallizer covering slag for continuously casting high-manganese high-aluminum steel and preparation method of crystallizer covering slag |
| CN106041006A (en) * | 2016-08-10 | 2016-10-26 | 中南大学 | Continuous casting tundish covering agent of Mn-containing and Al-containing steel and application thereof |
| CN106588900A (en) * | 2015-10-20 | 2017-04-26 | 北京康辰医药科技有限公司 | Benzo-bicyclic compound or its pharmaceutically acceptable salt, pharmaceutical composition and their application |
| JP2018030146A (en) * | 2016-08-24 | 2018-03-01 | 品川リフラクトリーズ株式会社 | Production method of granular mold powder by spray granulation method |
| CN108480579A (en) * | 2018-06-29 | 2018-09-04 | 西峡县西保冶金材料有限公司 | A kind of special low silicon Ultra-low carbon coverture of automobile slab and preparation method thereof |
| CN111112562A (en) * | 2019-12-24 | 2020-05-08 | 中钢集团邢台机械轧辊有限公司 | Covering agent for ingot of die casting and adding mode of covering agent |
| CN111570740A (en) * | 2020-05-29 | 2020-08-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Continuous casting mold flux for high alumina steel and preparation method thereof |
| CN111644582A (en) * | 2020-06-17 | 2020-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish covering agent for titanium-containing steel and preparation method and application thereof |
| CN113939376A (en) * | 2019-06-04 | 2022-01-14 | 杰富意钢铁株式会社 | Mold flux for continuous casting of Al-containing subperitectic steel and continuous casting method |
-
2022
- 2022-06-15 CN CN202210682377.4A patent/CN115156492B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204864A (en) * | 1978-04-19 | 1980-05-27 | Scm Corporation | Particulate slagging composition for the continuous casting of steel |
| US4624707A (en) * | 1985-10-11 | 1986-11-25 | Bethlehem Steel Corporation | Continuous casting slag |
| US4988376A (en) * | 1989-08-02 | 1991-01-29 | Western Research Institute | Glassification of lead and silica solid waste |
| JPH04274866A (en) * | 1991-03-02 | 1992-09-30 | Kobe Steel Ltd | Flux for adding in tundish |
| JPH05318087A (en) * | 1991-12-27 | 1993-12-03 | Sumitomo Metal Ind Ltd | Casting mold additive |
| JPH10339928A (en) * | 1997-06-06 | 1998-12-22 | Fuji Photo Film Co Ltd | Heat developable photographic material |
| WO2007013235A1 (en) * | 2005-07-29 | 2007-02-01 | Asahi Glass Company, Limited | Glass plate with protective film |
| JP2007290023A (en) * | 2006-04-27 | 2007-11-08 | Shinagawa Refract Co Ltd | Heat insulating material for molten metal vessel |
| CN101760585A (en) * | 2010-02-03 | 2010-06-30 | 衡阳华菱连轧管有限公司 | Deep-desulphurizing slag system containing BaO and Li2O and method for producing ultralow-sulfur steel by adopting same |
| CN104707959A (en) * | 2013-12-11 | 2015-06-17 | 宝山钢铁股份有限公司 | Continuous casting mold flux for automobile sheet |
| CN106588900A (en) * | 2015-10-20 | 2017-04-26 | 北京康辰医药科技有限公司 | Benzo-bicyclic compound or its pharmaceutically acceptable salt, pharmaceutical composition and their application |
| CN105562641A (en) * | 2016-01-27 | 2016-05-11 | 重庆大学 | Crystallizer covering slag for continuously casting high-manganese high-aluminum steel and preparation method of crystallizer covering slag |
| CN106041006A (en) * | 2016-08-10 | 2016-10-26 | 中南大学 | Continuous casting tundish covering agent of Mn-containing and Al-containing steel and application thereof |
| JP2018030146A (en) * | 2016-08-24 | 2018-03-01 | 品川リフラクトリーズ株式会社 | Production method of granular mold powder by spray granulation method |
| CN108480579A (en) * | 2018-06-29 | 2018-09-04 | 西峡县西保冶金材料有限公司 | A kind of special low silicon Ultra-low carbon coverture of automobile slab and preparation method thereof |
| CN113939376A (en) * | 2019-06-04 | 2022-01-14 | 杰富意钢铁株式会社 | Mold flux for continuous casting of Al-containing subperitectic steel and continuous casting method |
| CN111112562A (en) * | 2019-12-24 | 2020-05-08 | 中钢集团邢台机械轧辊有限公司 | Covering agent for ingot of die casting and adding mode of covering agent |
| CN111570740A (en) * | 2020-05-29 | 2020-08-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Continuous casting mold flux for high alumina steel and preparation method thereof |
| CN111644582A (en) * | 2020-06-17 | 2020-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish covering agent for titanium-containing steel and preparation method and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| WEI YAN等: "Viscosity and structure evolution of CaO–SiO2-based mold fluxes with involvement of CaO–Al2O3-based tundish fluxes", CERAMICS INTERNATIONAL, vol. 46, pages 14078 - 14089 * |
| 王德永, 刘承军, 王新丽, 史培阳, 朱传运, 姜茂发, 姚永宽: "稀土氧化物对中间包覆盖剂粘性特征的影响", 特殊钢, no. 03, 21 June 2003 (2003-06-21), pages 29 - 30 * |
| 陈艳芳等: "CaF2对碱性中间包覆盖剂物性参数的影响", 科技资讯, no. 28, pages 1 - 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116891957A (en) * | 2023-08-17 | 2023-10-17 | 江西省科学院应用物理研究所 | Covering agent for smelting carbonless heating copper-iron alloy and preparation method thereof |
| CN118847937A (en) * | 2024-09-23 | 2024-10-29 | 鞍钢股份有限公司 | A continuous casting steel tundish covering agent modifier and its preparation and use method |
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