CN108752017B - 电熔锆刚玉砖及其制备方法 - Google Patents
电熔锆刚玉砖及其制备方法 Download PDFInfo
- Publication number
- CN108752017B CN108752017B CN201810380801.3A CN201810380801A CN108752017B CN 108752017 B CN108752017 B CN 108752017B CN 201810380801 A CN201810380801 A CN 201810380801A CN 108752017 B CN108752017 B CN 108752017B
- Authority
- CN
- China
- Prior art keywords
- corundum brick
- fused zirconia
- zirconia corundum
- sio
- weight percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 46
- 239000010431 corundum Substances 0.000 title claims abstract description 46
- 239000011449 brick Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011734 sodium Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 229910052845 zircon Inorganic materials 0.000 claims description 5
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 3
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 21
- 239000011819 refractory material Substances 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 8
- 229910001928 zirconium oxide Inorganic materials 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- GEIAQOFPUVMAGM-UHFFFAOYSA-N Oxozirconium Chemical compound [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6565—Cooling rate
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
- C04B2235/662—Annealing after sintering
-
- 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
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Composite Materials (AREA)
Abstract
本发明涉及一种电熔锆刚玉砖及其制备方法，属于耐火材料的技术领域。本发明的电熔锆刚玉砖含有28.0～36.0wt％的ZrO2、10.5～15.0wt％的SiO2、0.72～1.05wt％的Na2O+K2O、2.2～6.0wt％的Nb2O5，余量为Al2O3以及不可避免的杂质，其中SiO2/(Na2O+K2O)的重量比为10～15。本发明的电熔锆刚玉砖通过在组成体系中引入适量的Nb2O5，并通过控制Na2O、K2O含量配比，降低了显气孔率提高了其分布均匀性，显著提高了制备的电熔锆刚玉砖的耐高温和抗玻璃液侵蚀能力，适用于液面线、窑坎、流料口、电极砖等玻璃窑炉中侵蚀严重的部位。
Description
技术领域
本发明涉及耐火材料的技术领域，更具体地说，本发明涉及一种电熔锆刚玉砖及其制备方法。
背景技术
电熔耐火材料是玻璃熔窑用三大耐火材料之一。熔窑炉龄的延长、先进熔化技术及保温技术的应用，与近几十年电熔耐火材料的改进分不开。电熔锆刚玉砖砖通常应用在玻璃窑炉中最关键部位，是用于玻璃窑炉熔池中的关键材料。US2438552A公开了一种改进的锆刚玉AZS产品，其包括45～70wt％的三氧化二铝、14～40wt％的二氧化锆、9～12wt％的二氧化硅、1.0～2.2wt％的氧化钠，和0.2～0.8wt％的氧化镁+氧化钙。目前市售的电熔锆刚玉砖通常包括约31～42wt％的二氧化锆、45～51wt％的氧化铝、12～16wt％的二氧化硅以及大约1wt％的氧化钠。在玻璃工业中，窑炉作为玻璃生产的核心装备，其技术水平在不断进步，广泛采用了提高燃烧强度、强化传热效果等新技术。新技术的引入也对电熔耐火材料的性能提出了更高的要求，要求电熔耐火材料例如电熔锆刚玉砖等能够承受更高的温度、更强烈的化学侵蚀。由于直接接触玻璃熔液，上述电熔锆刚玉砖的使用寿命只有5～6年，影响了窑炉的正常工作。
发明内容
为了解决现有技术中的上述技术问题，本发明的目的在于提供一种电熔锆刚玉砖及其制备方法。
为了解决上述技术问题并实现发明目的，本发明采用了以下技术方案：
一种电熔锆刚玉砖，含有28.0～36.0wt％的ZrO2、10.5～15.0wt％的SiO2、0.72～1.05wt％的Na2O+K2O、2.2～6.0wt％的Nb2O5，余量为Al2O3以及不可避免的杂质，并且其中SiO2/(Na2O+K2O)的重量比为10～15。
其中，Na2O/K2O的重量比为7～9:1。对于本发明的Al2O3-ZrO2-SiO2-Nb2O5体系，通过添加适量的Nb2O5和K2O(以K2CO3形式添加)，显著提高了制备的电熔锆刚玉砖的耐高温和抗玻璃液侵蚀能力，并且具有更低的玻璃相渗出量。
其中，所述不可避免的杂质的总含量小于1.0wt％。通过控制杂质的含量有利于提高制品抗玻璃液侵蚀能力、降低开裂风险，并减少基质玻璃的数量。
其中，SiO2/(Na2O+K2O)的重量比为10～13.5。
其中，所述ZrO2的含量优选为28.0～32.0wt％，所述Nb2O5的含量优选为3.0～6.0wt％。
本发明的第二方面还涉及一种电熔锆刚玉砖的制备方法。
本发明所述的电熔锆刚玉砖的制备方法，包括以下步骤：
(1)准备原料的混合物以形成起始配料，所述原料包括锆英砂、氧化锆、白刚玉粉、五氧化二铌、碳酸钠和/或碳酸钾，以及可选地石英砂；
(2)在电弧炉中熔化所述起始配料，并进行吹氧处理以得到熔融料液；
(3)浇铸并退火冷却得到所述的电熔锆刚玉砖。
其中，所述吹氧处理在2700～2800℃进行。
其中，浇铸时，熔融料液的温度为1850～1900℃，并且退火冷却的速度为5～50℃/h。
其中，所述退火冷却的速度优选为5～20℃/h。
与最接近的现有技术相比，本发明的电熔锆刚玉砖及其制备方法具有以下有益效果：
本发明的电熔锆刚玉砖通过在组成体系中引入适量的Nb2O5，并在玻璃相中引入Na2O和K2O降低了玻璃相含量，显气孔率提高了其分布均匀性，进而显著提高了制备的电熔锆刚玉砖的耐高温和抗玻璃液侵蚀能力。制备得到的电熔锆刚玉砖适用于液面线、窑坎、流料口、电极砖等玻璃窑炉中侵蚀严重的部位。
具体实施方式
以下将结合具体实施例对本发明所述的电熔锆刚玉砖及其制备方法做进一步的阐述，以期对本发明的技术方案做出更完整和清楚的说明。
本发明的电熔锆刚玉砖通过在组成体系中引入适量的Nb2O5，并在玻璃相中引入Na2O和K2O降低了玻璃相含量，显气孔率提高了其分布均匀性，进而显著提高了制备的电熔锆刚玉砖的耐高温和抗玻璃液侵蚀能力，并且具有更低的玻璃相渗出量。具体来说，本发明的电熔锆刚玉砖含有28.0～36.0wt％的ZrO2、10.5～15.0wt％的SiO2、0.72～1.05wt％的Na2O+K2O、2.2～6.0wt％的Nb2O5，余量为Al2O3以及不可避免的杂质，并且其中SiO2/(Na2O+K2O)的重量比为10～15(优选为10～13.5)。并且，Na2O/K2O的重量比为7～9:1。
在本发明的实施例以及比较例中采用白刚玉(Al2O3≥99.0wt％)、锆英砂(66.4wt％的ZrO2、33.5wt％的SiO2)、氧化锆(ZrO2≥98.0wt％)、五氧化二铌(Nb2O5≥99.0wt％)、碳酸钠，以及可选地碳酸钾、石英砂(SiO2≥99.0wt％)作为起始原料。在本发明中，电熔锆刚玉中的ZrO2至少有30％来源于氧化锆，优选电熔锆刚玉中的ZrO2有30～60％来源于氧化锆，通过在起始原料中引入部分氧化锆可以提高电熔锆刚玉砖中ZrO2-Al2O3共晶体的含量，降低散落二氧化锆以及刚玉晶体的含量，有利于提高抗玻璃液的侵蚀能力，从成本和性能的角度考虑在本发明中，采用的起始原料中锆英砂与氧化锆的重量比1～2:1，在下述实施例以及比较例中锆英砂与氧化锆的重量比为1:1。通过采用上述原料，可以控制杂质的总含量小于1.0wt％，并且Fe2O3的含量≤0.20wt％，B2O3的含量≤0.20wt％，TiO2的含量≤0.20wt％，CaO的含量≤0.20wt％，MgO的含量≤0.20wt％。
本发明的电熔锆刚玉砖通过以下方法制备得到：
(1)将起始原料按照计算的配比加入混料机中混合均匀。
(2)对电弧炉通电进行加热，升温至1850℃以上时加入混合好的起始原料，继续升温熔化，当电弧炉的炉温升至2700℃～2800℃，保温30分钟净化溶液后进行第一次吹氧，氧枪的插入深度为溶液面下300mm，吹氧量为在5个大气压下保持2.5分钟即可；15分钟后，进行第二次吹氧(重复第一次吹氧过程)。
(3)两次吹氧后，当电弧炉内的熔融料液温度降低至1850～1900℃进行浇铸，然后在保温箱中进行退火冷却，为了减少偏析并减少裂纹提高成品率，退火冷却的温度优选控制在约10℃/h。当温度降低至60℃，可结束退火取出，经检验合格后再进行切磨加工。
表1示出了采用上述方法作为实施例以及比较例的电熔锆刚玉砖的样品的元素组成。
表1中各实施例以及比较例中，余量为除了Al2O3、ZrO2、SiO2、Nb2O5、Na2O、K2O以外的其他组分(杂质)，并且作为其他组分(杂质)的含量小于1wt％，而且Fe2O3的含量≤0.20wt％，B2O3的含量≤0.20wt％，TiO2的含量≤0.20wt％，CaO的含量≤0.20wt％，MgO的含量≤0.20wt％。
表1
根据中国建材行业标准《玻璃熔窑用熔铸锆刚玉耐火制品》(JC493-2001)测定了上述实施例以及比较例的电熔锆刚玉砖的性能，结果如表2所示。
表2
对于本领域的普通技术人员而言，具体实施例只是对本发明进行了示例性描述，显然本发明具体实现并不受上述方式的限制，只要采用了本发明的方法构思和技术方案进行的各种非实质性的改进，或未经改进将本发明的构思和技术方案直接应用于其它场合的，均在本发明的保护范围之内。
Claims (7)
1.一种电熔锆刚玉砖，由28.0～36.0wt％的ZrO2、10.5～15.0wt％的SiO2、0.72～1.05wt％的Na2O+K2O、2.2～6.0wt％的Nb2O5，余量为Al2O3以及不可避免的杂质组成，其中SiO2/(Na2O+K2O)的重量比为10～15，Na2O/K2O的重量比为7～9:1，并且所述不可避免的杂质的总含量小于1.0wt％。
2.根据权利要求1所述的电熔锆刚玉砖，其特征在于：SiO2/(Na2O+K2O)的重量比为10～13.5。
3.根据权利要求1所述的电熔锆刚玉砖，其特征在于：所述ZrO2的含量为28.0～32.0wt％，Nb2O5的含量为3.0～6.0wt％。
4.权利要求1所述的电熔锆刚玉砖的制备方法，其特征在于包括以下步骤：
(1)准备原料的混合物以形成起始配料，所述原料包括锆英砂、氧化锆、白刚玉粉、五氧化二铌、碳酸钠、碳酸钾，以及石英砂；
(2)在电弧炉中熔化所述起始配料，并进行吹氧处理以得到熔融料液；
(3)浇铸并退火冷却得到所述的电熔锆刚玉砖。
5.根据权利要求4所述的电熔锆刚玉砖的制备方法，其特征在于所述吹氧处理在2700～2800℃进行。
6.根据权利要求5所述的电熔锆刚玉砖的制备方法，其特征在于浇铸时，熔融料液的温度为1850～1900℃，退火冷却的速度为5～50℃/h。
7.根据权利要求5所述的电熔锆刚玉砖的制备方法，其特征在于退火冷却的速度为5～20℃/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810380801.3A CN108752017B (zh) | 2018-04-25 | 2018-04-25 | 电熔锆刚玉砖及其制备方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810380801.3A CN108752017B (zh) | 2018-04-25 | 2018-04-25 | 电熔锆刚玉砖及其制备方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108752017A CN108752017A (zh) | 2018-11-06 |
| CN108752017B true CN108752017B (zh) | 2023-04-28 |
Family
ID=64011851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810380801.3A Active CN108752017B (zh) | 2018-04-25 | 2018-04-25 | 电熔锆刚玉砖及其制备方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108752017B (zh) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110002858A (zh) * | 2019-05-09 | 2019-07-12 | 山西普皓环保科技有限公司 | 一种耐高温条件下烟气侵蚀的耐火材料及其制备方法 |
| CN115368118B (zh) * | 2022-09-21 | 2023-05-16 | 淄博艾杰旭刚玉材料有限公司 | 超低气泡析出率azs电熔砖及其制备方法 |
| CN118005379B (zh) * | 2024-04-10 | 2024-07-12 | 中钢洛耐科技股份有限公司 | 一种电熔铬刚玉及其制备方法、电熔铬刚玉制品 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11343174A (ja) * | 1998-02-26 | 1999-12-14 | Asahi Glass Co Ltd | アルミナ・ジルコニア・シリカ質溶融耐火物およびそれを使用したガラス溶融窯 |
| CN101027262A (zh) * | 2004-09-20 | 2007-08-29 | 圣戈班欧洲设计研究中心 | 减少渗出的氧化铝－氧化锆－二氧化硅产品 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2929941B1 (fr) * | 2008-04-15 | 2011-03-04 | Saint Gobain Ct Recherches | Produit fritte dope a base de zircon |
| CN101648811A (zh) * | 2009-09-04 | 2010-02-17 | 郑州新光色耐火材料有限公司 | 一种熔铸锆刚玉砖的生产方法 |
| CN102503476B (zh) * | 2011-10-28 | 2013-06-05 | 郑州远东耐火材料有限公司 | 电熔锆刚玉砖的生产方法 |
| CN102731122B (zh) * | 2012-07-12 | 2013-09-18 | 郑州远东耐火材料有限公司 | 电熔锆刚玉料盆砖的生产方法 |
| CN102765932A (zh) * | 2012-08-16 | 2012-11-07 | 郑州远东耐火材料有限公司 | 电熔锆刚玉料棒连体浇铸方法 |
| CN104926328A (zh) * | 2015-06-16 | 2015-09-23 | 郑州远东耐火材料有限公司 | 一种电熔锆刚玉低渗出砖的生产方法 |
| CN107266089A (zh) * | 2017-06-27 | 2017-10-20 | 江苏徐耐新材料科技股份有限公司 | 一种抗形变的电熔锆刚玉的生产方法 |
| CN107555971B (zh) * | 2017-09-29 | 2021-02-02 | 淄博艾杰旭刚玉材料有限公司 | 高温下高电阻率的电熔azs砖及其制备方法 |
-
2018
- 2018-04-25 CN CN201810380801.3A patent/CN108752017B/zh active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11343174A (ja) * | 1998-02-26 | 1999-12-14 | Asahi Glass Co Ltd | アルミナ・ジルコニア・シリカ質溶融耐火物およびそれを使用したガラス溶融窯 |
| CN101027262A (zh) * | 2004-09-20 | 2007-08-29 | 圣戈班欧洲设计研究中心 | 减少渗出的氧化铝－氧化锆－二氧化硅产品 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108752017A (zh) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100937942B1 (ko) | 높은 지르코니아 함량을 갖는 용주 내화물 | |
| US8765620B2 (en) | Refractory product having high zirconia content | |
| KR101793244B1 (ko) | 높은 지르코니아 함량을 갖는 내화 생성물 | |
| CN102264667B (zh) | 用于玻璃熔炉的耐火块 | |
| JP6100334B2 (ja) | 高ジルコニア含有量を有する耐火製品 | |
| KR101779575B1 (ko) | 높은 지르코니아 함량을 갖는 내화물 | |
| KR101535614B1 (ko) | 지르코니아를 도핑한 내화성 물질 | |
| CN108752017B (zh) | 电熔锆刚玉砖及其制备方法 | |
| JP2010536701A (ja) | 高ジルコニア含有量及び高シリカ含有量を有する耐火物 | |
| JP5782118B2 (ja) | 耐火ブロックおよびガラス炉 | |
| JPH0240018B2 (zh) | ||
| CN107207357B (zh) | 具有高锆含量的熔融产品 | |
| CN116472257B (zh) | 高氧化锆电熔铸耐火物 | |
| CN117326864B (zh) | 高电阻率高锆砖及其制备方法 | |
| CN117362015B (zh) | 高纯刚玉砖及其制备方法 | |
| CN112062549B (zh) | 电熔锆刚玉砖及其制备方法 | |
| CN117923886B (zh) | 耐侵蚀的α-β氧化铝熔铸砖及其制备方法 | |
| CN110563472A (zh) | 一种适用于全氧燃烧玻璃熔窑用电熔锆刚玉砖及其生产工艺 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |