WO2019056952A1 - 一种kr脱硫搅拌桨浇注料及其制备方法 - Google Patents
一种kr脱硫搅拌桨浇注料及其制备方法 Download PDFInfo
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- WO2019056952A1 WO2019056952A1 PCT/CN2018/104508 CN2018104508W WO2019056952A1 WO 2019056952 A1 WO2019056952 A1 WO 2019056952A1 CN 2018104508 W CN2018104508 W CN 2018104508W WO 2019056952 A1 WO2019056952 A1 WO 2019056952A1
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- Prior art keywords
- castable
- desulfurization
- paddle
- casting material
- stirring paddle
- Prior art date
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 34
- 230000023556 desulfurization Effects 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000003756 stirring Methods 0.000 title abstract description 24
- 238000005266 casting Methods 0.000 title abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 22
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 9
- 239000010935 stainless steel Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 8
- 230000000996 additive effect Effects 0.000 claims abstract description 8
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 20
- 239000010437 gem Substances 0.000 claims description 10
- 229910001751 gemstone Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000571 coke Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 25
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 229910052593 corundum Inorganic materials 0.000 abstract description 8
- 230000003628 erosive effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000004927 clay Substances 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 14
- 229910010271 silicon carbide Inorganic materials 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 11
- 239000010431 corundum Substances 0.000 description 7
- 229910001570 bauxite Inorganic materials 0.000 description 6
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 5
- 239000010443 kyanite Substances 0.000 description 5
- 229910052850 kyanite Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910003465 moissanite Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 229910052849 andalusite Inorganic materials 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 and has high cost Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- C04B35/76—Fibres, filaments, whiskers, platelets, or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
Definitions
- the invention relates to the field of hot metal desulfurization, in particular to a desulfurization stirring paddle casting material and a preparation method thereof.
- the KR agitation desulfurization method was started in 1963 by the Nippon Steel Hiroshima Steel Works in Japan. In 1965, it was applied to industrial production of a hot metal furnace desulfurization technology.
- the desulfurization method is a method of immersing a refractory-mixed stirring blade into a molten iron tank to rotate and stir the molten iron to cause a vortex of the molten iron, and the weighed desulfurizing agent is added to the surface of the molten iron by the feeder, and is vortexed into the molten iron. , mixed with high-temperature molten iron, reaction, to achieve the purpose of desulfurization.
- the KR desulfurization method has the characteristics of high desulfurization efficiency, low desulfurizer consumption, short working time, low metal consumption and low consumption of refractory materials. Many steel mills are increasingly using KR desulfurization processes.
- the stirring paddle is an important part of the KR desulfurization device and is composed of a rotating shaft and a cross blade. Therefore, the stirring paddle is also called a stirrer or a stirring head.
- the stirring core is cast from a metal material, and the working lining is integrally casted into the refractory castable.
- the general agitating paddle is 4 blades, the steel structure is also 4 leaves, and the steel structure surface is provided with anchors.
- CN101857446A discloses the invention of "desulfurization paddle castable", sintered zirconium mullite 26-33%, ordinary fused mullite 26-35%, coke gemstone 5-9%, kyanite 4- 7%, special grade high alumina bauxite clinker 5-10%, silicon micropowder 3-5%, ⁇ -Al 2 O 3 micropowder 3-5%, ⁇ -Al 2 O 3 5-8%, pure calcium aluminate cement 1.5-3.5%, dense corundum fine powder 1.5-3.5%.
- the invention adopts sintered zirconium mullite and dense corundum fine powder, and has high cost, and kyanite is added, and the castable expands greatly, which is disadvantageous against thermal shock resistance.
- CN200510019721.8 discloses the invention of "refractory castable for hot metal desulfurization stirrer".
- kyanite, extra-grade high-aluminum and dense corundum fine powder are added, and the disadvantages of the latter three components are added.
- CN101337821A discloses an invention of "low density refractory castable for KR agitating paddle”. The granules are made of special grade gemstone, silica and silicon carbide.
- the castable also contains alumina powder, silicon carbide, silica fine powder and alumina cement of less than 0.074 mm.
- alumina powder, silicon carbide, silica fine powder and alumina cement of less than 0.074 mm.
- the coke sapphire and the silica in the main raw material of the invention have low density, the corrosion resistance is not good, and silicon carbide is mainly used as a raw material, which is not only costly but also disadvantageous against thermal shock resistance.
- CN104311071A discloses the invention of "refractory castable for molten iron desulfurization stirrer", 30-35 parts of silica, 20-25 parts of silicon carbide, 30-40 parts of fine sand powder, 40-45 parts of alumina fine powder, magnesium aluminum spinel 20-25 servings.
- CN201310059252.7 discloses an invention of "a casting production method of a converter hot water desulfurization stirring paddle", which uses capacitor mullite, white corundum, silicon carbide and andalusite.
- the disadvantages of silicon carbide have been explained above, adding white corundum to confront The thermal shock resistance is unfavorable, and the cost of white corundum is high.
- the research shows that the mixing paddle is used in the gap type, and the castable material is required to have good thermal shock resistance; the stirring paddle rotates at high speed in high temperature molten iron, and is washed away by molten iron, requiring the castable material to have good anti-scourability; the desulfurizing agent is contained Certain fluorite lime has an erosive effect on the castable, and the castable is required to have good corrosion resistance.
- the bottom line of the mixing paddle is mainly in two cases. First, the blade is cracked and peeled off. If it is used continuously, it may burn through the steel structure. Second, the blade wears more erosion, and the castable material is thinner and thinner. Stirring desulfurization effect.
- the castable must have both thermal shock resistance, erosion resistance and erosion resistance.
- the present invention provides a KR desulfurization paddle castable and a preparation method thereof, and improves and improves the comprehensive performance of the paddle castable, which has excellent thermal shock resistance and good resistance to molten steel flushing. And the corrosion resistance of the anti-desulfurizer, thereby increasing the service life of the stirring paddle.
- a KR desulfurization paddle castable consisting of a castable base and an additive
- the castable base material is composed of the following raw materials by weight: M70 sintered mullite 60-80%, coke gemstone 5-20%, fine powder 5-20%, pure calcium aluminate cement 1-5%;
- the percentage of each component of the additive to the weight of the castable base is 0.05 to 0.2% of the water reducing agent and 1 to 5% of the heat resistant stainless steel fiber.
- the percentage of Al 2 O 3 in the castable base of the present invention is from 60 to 70%.
- the main raw material is M70 sintered mullite (the content of Al 2 O 3 in M70 sintered mullite is 70% or more), and the weight percentage accounts for more than 60% of the castable base material, ensuring good thermal shock resistance and medium temperature. Both strength and high temperature strength are controlled at 100-180 MPa, ensuring good resistance to hot metal scouring.
- the Al 2 O 3 content of the castable is 60-70%, ensuring good corrosion resistance.
- the ratio of high temperature strength to medium temperature strength is controlled to 1-1.2 to further improve the thermal shock resistance of the castable.
- the coke gemstone is preferably a gemstone having an Al 2 O 3 content of 43% or more.
- the fine powder is made of silicon fine powder (SiO 2 content percentage: 92% or more, particle size ⁇ 1 ⁇ m) and/or alumina fine powder (Al 2 O 3 content percentage is 99% or more, particle size ⁇ 3 ⁇ m).
- the pure calcium aluminate cement is preferably a pure calcium aluminate cement having an Al 2 O 3 content of 70% or more.
- the heat resistant stainless steel fiber may be 446# heat resistant stainless steel fiber or the like.
- the high alumina bauxite is added, and although the Al 2 O 3 content of the stirring paddle is high, the castable containing the high bauxite has poor thermal shock resistance.
- the castable exhibits an expansion characteristic at a high temperature, and if kyanite and andalusite are further added, the castable is expanded to be larger, which is disadvantageous against thermal shock resistance.
- the M70 sintered mullite content is less than 60%, it is disadvantageous against thermal shock resistance. If the strength is less than 100 MPa, the anti-scouring property of the castable is not enough, higher than 180 MPa, and the strength is too high to resist thermal shock.
- the Al 2 O 3 content of the castable is less than 60%, the corrosion resistance is insufficient, higher than 70%, and the sintered mullite content is insufficient, which is disadvantageous against thermal shock resistance.
- the ratio of high temperature strength to medium temperature strength is less than 1, it indicates that the high temperature sintering strength of the castable is insufficient, and the erosion resistance is unfavorable. Above 1.2, the high temperature strength and the medium temperature strength differ greatly, and it is disadvantageous against thermal shock resistance and peeling resistance.
- the invention also provides a preparation method of the KR desulfurization paddle castable, that is, the castable base material and the additive are weighed according to the ratio, and the mixture is uniformly mixed.
- the invention improves the comprehensive performance of the casting material of the stirring paddle, has excellent thermal shock resistance, good corrosion resistance against molten steel and anti-desulfurizing agent, thereby improving the service life of the stirring paddle.
- the castables of Examples 1-3 and Comparative Examples 1-5 were obtained by weighing each of the raw materials according to the ratios in Table 1. Further, the castable bases were added to Examples 1-3 and Comparative Examples 1-5, respectively. A water reducing agent (sodium tripolyphosphate) having a weight of 0.12% and a heat-resistant stainless steel fiber of 3% of 446# were uniformly mixed, and KR desulfurization paddle castables of Examples 1-3 and Comparative Examples 1-5 were respectively obtained.
- a water reducing agent sodium tripolyphosphate having a weight of 0.12% and a heat-resistant stainless steel fiber of 3% of 446# were uniformly mixed, and KR desulfurization paddle castables of Examples 1-3 and Comparative Examples 1-5 were respectively obtained.
- the Al 2 O 3 content of the M70 sintered mullite is about 70%.
- the Al 2 O 3 content in the coke gemstone is about 43%.
- the fine powder was a mixture of silicon micropowder (SiO 2 content of about 92%, particle size ⁇ 1 ⁇ m) and alumina fine powder (Al 2 O 3 content of about 99%, particle size ⁇ 3 ⁇ m) in a mass ratio of 1:1.
- the Al 2 O 3 content in the pure calcium aluminate cement is about 70%.
- the heat resistant stainless steel fiber may be 446# heat resistant stainless steel fiber or the like.
- the Al 2 O 3 content in the present invention means the weight percentage of Al 2 O 3 .
- the medium temperature strength and high temperature strength are the compressive strength after burning at 1000 ° C for 3 h (test standard GB/T 5072.1-1998) and the compressive strength after firing at 1400 ° C for 3 h.
- the strength ratio is the ratio of the compressive strength after burning at 1400 ° C for 3 h and the compressive strength after burning at 1000 ° C for 3 h.
- the thermal shock resistance (test standard YB/T 2206.2-1998) was observed after 1100 ° C ⁇ water cooling for 35 times.
- the corrosion resistance index is based on Example 2, and the larger the value, the worse the corrosion resistance.
- Comparative Example 1 the medium-temperature strength and high-temperature strength of Comparative Example 1 were relatively low, and Comparative Example 2 was more added due to the addition of coke gemstones, and the corrosion resistance was poor.
- Comparative Example 3 contained more super-grade bauxite and was less resistant to thermal shock.
- Comparative Example 4 contains more SiC and has poor thermal shock resistance.
- Comparative Example 5 is too strong in strength ratio and has poor thermal shock resistance.
- the embodiment 1-3 of the invention improves the comprehensive performance of the caster casting material, has excellent thermal shock resistance, good corrosion resistance against molten steel and anti-desulfurization agent, thereby facilitating the use of the stirring paddle. life.
- Example 2 The effect of the use of Example 2 and Comparative Example 2 was compared, and the results are shown in Table 3.
- Example 2 The castable cost of Example 2 was reduced by 8% compared to Comparative Example 2, and the life of the blender was increased by 12%.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
项目 | 实施例2 | 对比例2 |
浇注料成本 | 降低了8% | / |
桨叶开裂、剥落 | 较少 | 较多 |
搅拌桨底部侵蚀 | 较少 | 较多 |
桨叶修补次数 | 较少 | 较多 |
搅拌桨寿命 | 提高了12% | / |
Claims (7)
- 一种KR脱硫搅拌桨浇注料,由浇注料基料和添加剂组成,其特征在于:所述浇注料基料由如下重量百分比的原料组成:M70烧结莫来石60~80%、焦宝石5~20%、微粉5~20%、纯铝酸钙水泥1~5%;所述添加剂的各组分占浇注料基料重量的百分比为:减水剂0.05~0.2%、耐热不锈钢纤维1~5%。
- 根据权利要求1所述的KR脱硫搅拌桨浇注料,其特征在于:浇注料基料中Al 2O 3含量百分比为60~70%。
- 根据权利要求1所述的KR脱硫搅拌桨浇注料,其特征在于:M70烧结莫来石中Al 2O 3含量占比大于等于70%。
- 根据权利要求1所述的KR脱硫搅拌桨浇注料,其特征在于:焦宝石中Al 2O 3含量占比大于等于43%。
- 根据权利要求1所述的KR脱硫搅拌桨浇注料,其特征在于:微粉为硅微粉/或氧化铝微粉。
- 根据权利要求1所述的KR脱硫搅拌桨浇注料,其特征在于:纯铝酸钙水泥中Al 2O 3含量占比大于等于70%。
- 权利要求1-6中任一项所述KR脱硫搅拌桨浇注料的制备方法:按配比称取浇注料基料和添加剂,混合均匀。
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JP2020516629A JP7019801B2 (ja) | 2017-09-21 | 2018-09-07 | Kr脱硫攪拌パドル注型材及びその製造方法 |
US16/649,395 US11267764B2 (en) | 2017-09-21 | 2018-09-07 | KR desulfurization stirring paddle casting material and preparation method therefor |
KR1020207010712A KR102420556B1 (ko) | 2017-09-21 | 2018-09-07 | Kr 탈황 교반패들 주조재 및 그의 제조방법 |
EP18858583.0A EP3686175B1 (en) | 2017-09-21 | 2018-09-07 | Kr desulfurization stirring paddle casting material and preparation method therefor |
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CN201710861888.1A CN109534829A (zh) | 2017-09-21 | 2017-09-21 | 一种kr脱硫搅拌桨浇注料及其制备方法 |
CN201710861888.1 | 2017-09-21 |
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PCT/CN2018/104508 WO2019056952A1 (zh) | 2017-09-21 | 2018-09-07 | 一种kr脱硫搅拌桨浇注料及其制备方法 |
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US (1) | US11267764B2 (zh) |
EP (1) | EP3686175B1 (zh) |
JP (1) | JP7019801B2 (zh) |
KR (1) | KR102420556B1 (zh) |
CN (1) | CN109534829A (zh) |
WO (1) | WO2019056952A1 (zh) |
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CN110256090A (zh) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | 一种中间包永久层用轻量化保温浇注料 |
CN112225542A (zh) * | 2020-09-30 | 2021-01-15 | 鞍钢股份有限公司 | 一种提高kr搅拌桨寿命的方法 |
CN112694338A (zh) * | 2020-12-30 | 2021-04-23 | 北京利尔高温材料股份有限公司 | 一种耐火预制件用环保型浇注料及其制备方法 |
CN114573329A (zh) * | 2020-12-01 | 2022-06-03 | 云南濮耐昆钢高温材料有限公司 | 一种铜溜槽用铝碳质浇注料 |
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CN110256090A (zh) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | 一种中间包永久层用轻量化保温浇注料 |
CN110256090B (zh) * | 2019-06-24 | 2022-04-29 | 武汉钢铁有限公司 | 一种中间包永久层用轻量化保温浇注料 |
CN112225542A (zh) * | 2020-09-30 | 2021-01-15 | 鞍钢股份有限公司 | 一种提高kr搅拌桨寿命的方法 |
CN114573329A (zh) * | 2020-12-01 | 2022-06-03 | 云南濮耐昆钢高温材料有限公司 | 一种铜溜槽用铝碳质浇注料 |
CN112694338A (zh) * | 2020-12-30 | 2021-04-23 | 北京利尔高温材料股份有限公司 | 一种耐火预制件用环保型浇注料及其制备方法 |
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JP7019801B2 (ja) | 2022-02-15 |
US20200308065A1 (en) | 2020-10-01 |
EP3686175A1 (en) | 2020-07-29 |
CN109534829A (zh) | 2019-03-29 |
KR102420556B1 (ko) | 2022-07-18 |
EP3686175A4 (en) | 2021-01-13 |
US11267764B2 (en) | 2022-03-08 |
KR20200055035A (ko) | 2020-05-20 |
EP3686175B1 (en) | 2023-06-28 |
JP2020534242A (ja) | 2020-11-26 |
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