CN108033792B - A kind of primary electromagnetic field SiC-ZnO refractory castable and preparation method thereof - Google Patents
A kind of primary electromagnetic field SiC-ZnO refractory castable and preparation method thereof Download PDFInfo
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- 230000005672 electromagnetic field Effects 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002245 particle Substances 0.000 claims abstract description 46
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 17
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-NJFSPNSNSA-N silicon-30 atom Chemical compound [30Si] XUIMIQQOPSSXEZ-NJFSPNSNSA-N 0.000 claims abstract description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 75
- 239000011787 zinc oxide Substances 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910052733 gallium Inorganic materials 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 26
- 239000010959 steel Substances 0.000 abstract description 26
- 238000011065 in-situ storage Methods 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 description 16
- 239000002893 slag Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009847 ladle furnace Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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- 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
- C04B35/453—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 zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- 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
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Abstract
本发明涉及一种原生电磁场SiC‑ZnO耐火浇注料及其制备方法。其技术方案是：以40～60wt％的碳化硅颗粒、5～10wt％碳化硅细粉和30～55wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料5～15wt％的硅溶胶混合，搅拌均匀，制得原生电磁场SiC‑ZnO耐火浇注料。所述碳化硅颗粒的粒径级配是：粒径小于6mm且大于等于3mm占碳化硅颗粒的30～40wt％，粒径小于3mm且大于等于1mm占碳化硅颗粒的60～70wt％。本发明所制备的原生电磁场SiC‑ZnO耐火浇注料具有优异的高温力学性能、热震稳定性及热电性能，并能利用在服役过程中的温差原位产生电磁场，减少制品对钢水的污染，提升钢铁质量。The invention relates to a primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof. The technical scheme is as follows: 40-60wt% silicon carbide particles, 5-10wt% silicon carbide fine powder and 30-55wt% thermoelectric oxide powder are used as raw materials, and are mixed uniformly to obtain a premix; and then the premix is obtained. The mixture is mixed with 5-15 wt % of the silica sol of the raw material, and stirred evenly to prepare the primary electromagnetic field SiC-ZnO refractory castable. The particle size distribution of the silicon carbide particles is as follows: the particle size is less than 6 mm and greater than or equal to 3 mm, accounting for 30-40 wt % of the silicon carbide particles, and the particle size is less than 3 mm and greater than or equal to 1 mm accounting for 60-70 wt % of the silicon carbide particles. The primary electromagnetic field SiC-ZnO refractory castable prepared by the invention has excellent high-temperature mechanical properties, thermal shock stability and thermoelectric properties, and can utilize the temperature difference during service to generate an electromagnetic field in situ, thereby reducing the pollution of the product to molten steel and improving the Steel quality.
Description
技术领域technical field
本发明属于SiC-ZnO耐火浇注料技术领域。具体涉及一种原生电磁场SiC-ZnO耐火浇注料及其制备方法。The invention belongs to the technical field of SiC-ZnO refractory castables. Specifically, it relates to a primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof.
背景技术Background technique
钢铁生产中，钢渣不可避免地与二次精炼炉以及浇钢系统的水口、塞棒、滑板等耐火材料接触。在这些过程中钢渣对耐火材料的作用主要包括两个方面：由于钢水的冲刷、剥落造成耐火材料整块的落入融钢中，形成尺寸较大的外来夹杂；耐火材料的组成元素溶解到熔融钢铁中，包括耐火材料的构成氧化物或氮化物、碳及各种结合剂与添加剂。因此，耐火材料的剥落与蚀损产生非金属杂质成为制约钢铁品质的重要污染源，为了应对耐火材料苛刻的服役环境，多种新型耐火材料被开发。“一种六铝酸钙轻质耐火材料及其制备方法”(CN201710117068.1)以氧化铝微粉和石灰石为原料制备六铝酸钙轻质耐火材料，有效降低了耐火材料的体积密度和热导率。“一种刚玉-尖晶石轻量耐火材料及其制备方法”(CN201610172544.5)以镁砂和碳为反应源，制备了烧成温度低、气孔率可调的刚玉-尖晶石轻量耐火材料，具有较好的抗渗透性能。虽然所述新型耐火材料的抗渗透和侵蚀性能有所改善，然而，从钢厂的实际应用情况来看，高品质钢的质量控制仍然难以实现。目前仅靠提升耐火材料自身性能的技术，很难消除耐火材料引入的杂质对高品质钢的影响。In steel production, steel slag inevitably comes into contact with refractory materials such as secondary refining furnaces and the nozzles, stoppers, and slide plates of the steel casting system. In these processes, the effect of steel slag on refractories mainly includes two aspects: due to the erosion and peeling of molten steel, the whole refractory material falls into the molten steel, forming large-sized foreign inclusions; the constituent elements of the refractory material dissolve into the molten steel. In steel, the constituent oxides or nitrides of refractories, carbon and various binders and additives are included. Therefore, non-metallic impurities generated by the peeling and corrosion of refractory materials have become an important source of pollution that restricts the quality of steel. In order to cope with the harsh service environment of refractory materials, a variety of new refractory materials have been developed. "A light calcium hexaaluminate refractory material and its preparation method" (CN201710117068.1) use alumina micropowder and limestone as raw materials to prepare calcium hexaaluminate light refractory material, which effectively reduces the bulk density and thermal conductivity of the refractory material Rate. "A corundum-spinel lightweight refractory material and its preparation method" (CN201610172544.5) Using magnesia and carbon as reaction sources, a corundum-spinel lightweight refractory with low firing temperature and adjustable porosity was prepared Refractory material with good penetration resistance. Although the anti-penetration and erosion properties of the new refractory materials have been improved, however, from the practical application of steel mills, the quality control of high-quality steel is still difficult to achieve. At present, it is difficult to eliminate the impact of impurities introduced by refractory materials on high-quality steel only by improving the performance of refractory materials.
发明内容SUMMARY OF THE INVENTION
本发明旨在克服现有技术缺陷，目的是提供一种原生电磁场SiC-ZnO耐火浇注料的制备方法，所制备的原生电磁场SiC-ZnO耐火浇注料能利用在服役过程中的温差原位产生电磁场，减少制品对钢水的污染，提升钢铁质量。The invention aims to overcome the defects of the prior art, and the purpose is to provide a preparation method of a primary electromagnetic field SiC-ZnO refractory castable, and the prepared primary electromagnetic field SiC-ZnO refractory castable can utilize the temperature difference during service to generate an electromagnetic field in situ , reduce the pollution of products to molten steel and improve the quality of steel.
为实现上述目的，本发明采用的技术方案是：以40～60wt％的碳化硅颗粒、5～10wt％碳化硅细粉和30～55wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料5～15wt％的硅溶胶混合，搅拌均匀，制得SiC-ZnO耐火浇注料。In order to achieve the above purpose, the technical scheme adopted in the present invention is as follows: using 40-60wt% silicon carbide particles, 5-10wt% silicon carbide fine powder and 30-55wt% thermoelectric oxide powder as raw materials, mixing uniformly to obtain a mixing; and then mixing the premix with 5-15 wt % of the raw material silica sol, stirring uniformly, to prepare a SiC-ZnO refractory castable.
所述的碳化硅颗粒纯度≥98wt％，所述碳化硅颗粒的粒径级配是：粒径小于6mm且大于等于3mm占碳化硅颗粒的30～40wt％，粒径小于3mm且大于等于1mm占碳化硅颗粒的60～70wt％。The purity of the silicon carbide particles is greater than or equal to 98wt%, and the particle size distribution of the silicon carbide particles is: the particle size is less than 6mm and greater than or equal to 3mm, accounting for 30-40wt% of the silicon carbide particles, and the particle size is less than 3mm and greater than or equal to 1mm. 60-70 wt% of silicon carbide particles.
所述碳化硅细粉的纯度≥98wt％，碳化硅细粉的粒径≤0.018mm。The purity of the silicon carbide fine powder is greater than or equal to 98wt%, and the particle size of the silicon carbide fine powder is less than or equal to 0.018mm.
所述热电氧化物粉体为氧化锌和或为掺杂氧化锌；所述掺杂氧化锌的掺杂元素为Al、Ga、Ni和In中的一种；所述热电氧化物粉体的纯度≥99wt％，粒径≤5μm。The thermoelectric oxide powder is zinc oxide and or doped zinc oxide; the doping element of the doped zinc oxide is one of Al, Ga, Ni and In; the purity of the thermoelectric oxide powder ≥99wt%, particle size≤5μm.
所述硅溶胶的SiO2含量为25～30％，pH值为9～11。The SiO 2 content of the silica sol is 25-30%, and the pH is 9-11.
由于采用上述技术方案，本发明与现有技术相比具有如下积极效果：Owing to adopting the above-mentioned technical scheme, the present invention has the following positive effects compared with the prior art:
(1)本发明采用的碳化硅具有良好的耐腐蚀及高温力学性能，同时SiC中添加ZnO能够很好的改善耐火浇注料的热电性能，能够大幅度提升SiC-ZnO耐火浇注料的原生电磁场特性，故所制备的原生电磁场SiC-ZnO耐火浇注料具有优良的高温力学性能及热电性能。(1) The silicon carbide used in the present invention has good corrosion resistance and high temperature mechanical properties, and at the same time, adding ZnO to SiC can well improve the thermoelectric properties of the refractory castable, and can greatly improve the primary electromagnetic field characteristics of the SiC-ZnO refractory castable Therefore, the prepared primary electromagnetic field SiC-ZnO refractory castable has excellent high temperature mechanical properties and thermoelectric properties.
(2)本发明将所制备的原生电磁场SiC-ZnO耐火浇注料用于钢包工作衬，利用炉内热量向钢包炉体外壳传递产生的温度梯度，利用其服役条件的温差原位产生电磁场，不需要借助外部辅助产生电磁场，具有环保和节能优点。(2) The present invention uses the prepared primary electromagnetic field SiC-ZnO refractory castable for the ladle working lining, utilizes the temperature gradient generated by the transfer of heat in the furnace to the ladle furnace shell, and utilizes the temperature difference of its service conditions to generate the electromagnetic field in situ, without The electromagnetic field needs to be generated with external assistance, which has the advantages of environmental protection and energy saving.
(3)本发明通过所述原位产生的电磁场能够改变SiC-ZnO耐火浇注料与钢渣的界面环境，显著改善所述原生电磁场SiC-ZnO耐火浇注料与钢渣的界面作用，提高了制品的使用寿命，减少钢水的污染。(3) The present invention can change the interface environment between the SiC-ZnO refractory castable and the steel slag through the electromagnetic field generated in situ, significantly improve the interface effect between the original electromagnetic field SiC-ZnO refractory castable and the steel slag, and improve the use of the product life, reduce the pollution of molten steel.
本发明制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为16～29MPa；有效服役次数提升27～40次。The primary electromagnetic field SiC-ZnO refractory castable prepared by the invention is tested: the flexural strength is 16-29 MPa; the effective service times are increased by 27-40 times.
因此，本发明所制备的原生电磁场SiC-ZnO耐火浇注料具有优异的高温力学性能、热震稳定性及热电性能，并能利用在服役过程中的温差原位产生电磁场，减少制品对钢水的污染，提升钢铁质量。Therefore, the primary electromagnetic field SiC-ZnO refractory castable prepared by the present invention has excellent high temperature mechanical properties, thermal shock stability and thermoelectric properties, and can utilize the temperature difference during service to generate an electromagnetic field in situ, thereby reducing the pollution of the product to molten steel , to improve the quality of steel.
具体实施方式Detailed ways
以下结合实施例对本发明做进一步阐述，本发明并不局限于下述实例。The present invention will be further described below in conjunction with the embodiments, but the present invention is not limited to the following examples.
所述的碳化硅颗粒纯度≥98wt％，所述碳化硅颗粒的粒径级配是：粒径小于6mm且大于等于3mm占碳化硅颗粒的30～40wt％，粒径小于3mm且大于等于1mm占碳化硅颗粒的60～70wt％。The purity of the silicon carbide particles is greater than or equal to 98wt%, and the particle size distribution of the silicon carbide particles is: the particle size is less than 6mm and greater than or equal to 3mm, accounting for 30-40wt% of the silicon carbide particles, and the particle size is less than 3mm and greater than or equal to 1mm. 60-70 wt% of silicon carbide particles.
所述硅溶胶的SiO2含量为25～30％，pH值为9～11。The SiO 2 content of the silica sol is 25-30%, and the pH is 9-11.
所述热电氧化物粉体的纯度≥99wt％，粒径≤5μmThe purity of the thermoelectric oxide powder is greater than or equal to 99wt%, and the particle size is less than or equal to 5μm
实施例1Example 1
一种原生电磁场SiC-ZnO耐火浇注料及其制备方法。本实施所述制备方法是A primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof. The preparation method described in this implementation is
以40～47wt％的碳化硅颗粒、5～8wt％碳化硅细粉和45～53wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料5～7wt％的硅溶胶混合，搅拌均匀，制得SiC-ZnO耐火浇注料。Using 40-47wt% of silicon carbide particles, 5-8wt% of silicon carbide fine powder and 45-53wt% of thermoelectric oxide powder as raw materials, mixing uniformly to obtain a premix; then combining the premix with the 5-7wt% silica sol of raw materials is mixed and stirred evenly to prepare SiC-ZnO refractory castable.
所述碳化硅细粉的纯度≥98wt％，碳化硅细粉的粒径≤0.018mm。The purity of the silicon carbide fine powder is greater than or equal to 98wt%, and the particle size of the silicon carbide fine powder is less than or equal to 0.018mm.
所述热电氧化物粉体为氧化锌。The thermoelectric oxide powder is zinc oxide.
本实施例制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为25～29MPa；有效服役次数提升27～35次。The primary electromagnetic field SiC-ZnO refractory castable prepared in this example is tested: the flexural strength is 25-29 MPa; the effective service times are increased by 27-35 times.
实施例2Example 2
一种原生电磁场SiC-ZnO耐火浇注料及其制备方法。本实施所述制备方法是A primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof. The preparation method described in this implementation is
以44～49wt％的碳化硅颗粒、6.5～9.5wt％碳化硅细粉和41.5～49.5wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料7～9wt％的硅溶胶混合，搅拌均匀，制得SiC-ZnO耐火浇注料。44-49wt% of silicon carbide particles, 6.5-9.5wt% of silicon carbide fine powder and 41.5-49.5wt% of thermoelectric oxide powder are used as raw materials, mixed uniformly to obtain a premix; then the premix is mixed with The 7-9 wt% silica sol of the raw materials is mixed and stirred evenly to prepare a SiC-ZnO refractory castable.
所述碳化硅细粉的纯度≥98wt％，碳化硅细粉的粒径≤0.018mm。The purity of the silicon carbide fine powder is greater than or equal to 98wt%, and the particle size of the silicon carbide fine powder is less than or equal to 0.018mm.
所述热电氧化物粉体为掺杂氧化锌；所述掺杂氧化锌的掺杂元素为Al。The thermoelectric oxide powder is doped zinc oxide; the doping element of the doped zinc oxide is Al.
本实施例制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为22～26MPa；有效服役次数提升32～39次。The primary electromagnetic field SiC-ZnO refractory castable prepared in this example is tested: the flexural strength is 22-26 MPa; the effective service times are increased by 32-39 times.
实施例3Example 3
一种原生电磁场SiC-ZnO耐火浇注料及其制备方法。本实施所述制备方法是A primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof. The preparation method described in this implementation is
以48～53wt％的碳化硅颗粒、6～9wt％碳化硅细粉和38～46wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料9～11wt％的硅溶胶混合，搅拌均匀，制得SiC-ZnO耐火浇注料。Using 48-53wt% of silicon carbide particles, 6-9wt% of silicon carbide fine powder and 38-46wt% of thermoelectric oxide powder as raw materials, mixing uniformly to obtain a premix; then combining the premix with the 9-11 wt % of the raw materials are mixed with silica sol, and the mixture is uniformly stirred to prepare a SiC-ZnO refractory castable.
所述碳化硅细粉的纯度≥98wt％，碳化硅细粉的粒径≤0.018mm。The purity of the silicon carbide fine powder is greater than or equal to 98wt%, and the particle size of the silicon carbide fine powder is less than or equal to 0.018mm.
所述热电氧化物粉体为掺杂氧化锌；所述掺杂氧化锌的掺杂元素为Ga。The thermoelectric oxide powder is doped zinc oxide; the doping element of the doped zinc oxide is Ga.
本实施例制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为20～24MPa；有效服役次数提升38～45次。The primary electromagnetic field SiC-ZnO refractory castable prepared in this example is tested: the flexural strength is 20-24 MPa; the effective service times are increased by 38-45 times.
实施例4Example 4
一种原生电磁场SiC-ZnO耐火浇注料及其制备方法。本实施所述制备方法是A primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof. The preparation method described in this implementation is
以52～57wt％的碳化硅颗粒、5.5～8.5wt％碳化硅细粉和34.5～42.5wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料11～13wt％的硅溶胶混合，搅拌均匀，制得SiC-ZnO耐火浇注料。Using 52-57wt% of silicon carbide particles, 5.5-8.5wt% of silicon carbide fine powder and 34.5-42.5wt% of thermoelectric oxide powder as raw materials, mixing uniformly to obtain a premix; then mixing the premix with 11-13wt% silica sol of the raw materials is mixed and stirred evenly to prepare a SiC-ZnO refractory castable.
所述碳化硅细粉的纯度≥98wt％，碳化硅细粉的粒径≤0.018mm。The purity of the silicon carbide fine powder is greater than or equal to 98wt%, and the particle size of the silicon carbide fine powder is less than or equal to 0.018mm.
所述热电氧化物粉体为掺杂氧化锌；所述掺杂氧化锌的掺杂元素为Ni。The thermoelectric oxide powder is doped zinc oxide; the doping element of the doped zinc oxide is Ni.
本实施例制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为18～21MPa；有效服役次数提升34～40次。The primary electromagnetic field SiC-ZnO refractory castable prepared in this example is tested: the flexural strength is 18-21 MPa; the effective service times are increased by 34-40 times.
实施例5Example 5
一种原生电磁场SiC-ZnO耐火浇注料及其制备方法。本实施所述制备方法是A primary electromagnetic field SiC-ZnO refractory castable and a preparation method thereof. The preparation method described in this implementation is
以56～60wt％的碳化硅颗粒、7～10wt％碳化硅细粉和30～37wt％的热电氧化物粉体为原料，混合均匀，得到预混料；然后将所述预混料与所述原料13～15wt％的硅溶胶混合，搅拌均匀，制得SiC-ZnO耐火浇注料。Using 56-60wt% of silicon carbide particles, 7-10wt% of silicon carbide fine powder and 30-37wt% of thermoelectric oxide powder as raw materials, mixing uniformly to obtain a premix; then combining the premix with the 13-15wt% silica sol of the raw material is mixed and stirred evenly to prepare the SiC-ZnO refractory castable.
所述碳化硅细粉的纯度≥98wt％，碳化硅细粉的粒径≤0.018mm。The purity of the silicon carbide fine powder is greater than or equal to 98wt%, and the particle size of the silicon carbide fine powder is less than or equal to 0.018mm.
所述热电氧化物粉体为掺杂氧化锌；所述掺杂氧化锌的掺杂元素为In。The thermoelectric oxide powder is doped zinc oxide; the doping element of the doped zinc oxide is In.
本实施例制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为16～19MPa；有效服役次数提升30～37次。The primary electromagnetic field SiC-ZnO refractory castable prepared in this example is tested: the flexural strength is 16-19 MPa; the effective service times are increased by 30-37 times.
本发明与现有技术相比具有如下积极效果：Compared with the prior art, the present invention has the following positive effects:
(1)本发明采用的碳化硅具有良好的耐腐蚀及高温力学性能，同时SiC中添加ZnO能够很好的改善耐火浇注料的热电性能，能够大幅度提升SiC-ZnO耐火浇注料的原生电磁场特性，故所制备的原生电磁场SiC-ZnO耐火浇注料具有优良的高温力学性能及热电性能。(1) The silicon carbide used in the present invention has good corrosion resistance and high temperature mechanical properties, and at the same time, adding ZnO to SiC can well improve the thermoelectric properties of the refractory castable, and can greatly improve the primary electromagnetic field characteristics of the SiC-ZnO refractory castable Therefore, the prepared primary electromagnetic field SiC-ZnO refractory castable has excellent high temperature mechanical properties and thermoelectric properties.
(2)本发明将所制备的原生电磁场SiC-ZnO耐火浇注料用于钢包工作衬，利用炉内热量向钢包炉体外壳传递产生的温度梯度，利用其服役条件的温差原位产生电磁场，不需要借助外部辅助产生电磁场，具有环保和节能优点。(2) The present invention uses the prepared primary electromagnetic field SiC-ZnO refractory castable for the ladle working lining, utilizes the temperature gradient generated by the transfer of heat in the furnace to the ladle furnace shell, and utilizes the temperature difference of its service conditions to generate the electromagnetic field in situ, without The electromagnetic field needs to be generated with external assistance, which has the advantages of environmental protection and energy saving.
(3)本发明通过所述原位产生的电磁场能够改变SiC-ZnO耐火浇注料与钢渣的界面环境，显著改善所述原生电磁场SiC-ZnO耐火浇注料与钢渣的界面作用，提高了制品的使用寿命，减少钢水的污染。(3) The present invention can change the interface environment between the SiC-ZnO refractory castable and the steel slag through the electromagnetic field generated in situ, significantly improve the interface effect between the original electromagnetic field SiC-ZnO refractory castable and the steel slag, and improve the use of the product life, reduce the pollution of molten steel.
本发明制备的原生电磁场SiC-ZnO耐火浇注料经检测：抗折强度为16～29MPa；有效服役次数提升27～40次。The primary electromagnetic field SiC-ZnO refractory castable prepared by the invention is tested: the flexural strength is 16-29 MPa; the effective service times are increased by 27-40 times.
因此，本发明所制备的原生电磁场SiC-ZnO耐火浇注料具有优异的高温力学性能、热震稳定性及热电性能，并能利用在服役过程中的温差原位产生电磁场，减少制品对钢水的污染，提升钢铁质量。Therefore, the primary electromagnetic field SiC-ZnO refractory castable prepared by the present invention has excellent high temperature mechanical properties, thermal shock stability and thermoelectric properties, and can utilize the temperature difference during service to generate an electromagnetic field in situ, thereby reducing the pollution of the product to molten steel , to improve the quality of steel.
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