CN110615670A - 高性能镁质滑板砖及其制备方法 - Google Patents
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- 239000011777 magnesium Substances 0.000 title claims abstract description 43
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 39
- 239000011449 brick Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000000843 powder Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 26
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 23
- 239000011029 spinel Substances 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 19
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 16
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052839 forsterite Inorganic materials 0.000 claims abstract description 15
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 15
- 230000001737 promoting effect Effects 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 11
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 10
- 235000012245 magnesium oxide Nutrition 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 15
- 239000001095 magnesium carbonate Substances 0.000 claims description 14
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 14
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 14
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 229910052593 corundum Inorganic materials 0.000 claims description 9
- 229910052681 coesite Inorganic materials 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims description 8
- 229910052682 stishovite Inorganic materials 0.000 claims description 8
- 229910052905 tridymite Inorganic materials 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 21
- 239000010959 steel Substances 0.000 abstract description 21
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052791 calcium Inorganic materials 0.000 abstract description 5
- 239000011575 calcium Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 17
- 230000035939 shock Effects 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- 230000003628 erosive effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical group [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 239000010431 corundum Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- -1 aluminum-zirconium-carbon Chemical compound 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000011010 synthetic spinel Substances 0.000 description 1
- 239000005028 tinplate Substances 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
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- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
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Abstract
本发明公开了高性能镁质滑板砖，按重量百分含量计，包含以下组分：97电熔镁砂47％～54％、镁橄榄石7％～9％、电熔尖晶石12％～18％、高温促烧粉4％～6％、陶瓷塑粘剂5％～8％、含碳粉1％～3％、石墨1％～3％、碳化硼1％～3％、铝镁合金粉4％～6％、硅粉2％～4％、上述配方中所有组分重量之和为100％，外加树脂4％～5％，树脂增强剂0.4％～0.5％。本发明的目的在于提供了一种具有浇铸钙处理钢和高氧钢、低碳优质钢开辟了行业新领域，解决了多家钢厂滑板寿命低、耐材吨钢消耗量大的问题，同时为钢厂节约成本、减少资源浪费，降本增效显著的高性能镁质滑板砖及其制备方法。
Description
技术领域
本发明涉及以氧化铝、氧化镁、碳为基料的无机非金属耐火材料领域， 更具体涉及高性能镁质滑板砖及其制备方法。
背景技术
目前国内用的滑板主要有铝锆碳、铝碳滑板和镶嵌锆环滑板。其中铝锆 碳滑板在浇注普钢时表现出很好的抗热震性、抗侵蚀和耐磨性能，其综合性 能较好，是非常成熟的产品。但是在浇注钙处理钢时，因为滑板中的Al2O3和SiO2在较低的温度下就能与钢水中的CaO发生反应，生成低熔物，在钢水 冲刷、控流的过程中，极易造成滑板板面拉毛、夹钢。虽然氧化锆滑板在浇 注钙处理钢时，有很好的抗热震、抗侵蚀、抗氧化等性能，但是在浇注铝镇 静钢时亦有熔损，
并且氧化锆价格比较昂贵，在这种情况下我们研发了高性能镁质滑板。
由于氧化镁有较好的抗钢水的和熔渣的侵蚀性，因此用高纯镁砂开发了 镁质滑动水口，主要有方镁石质和方镁石-尖晶石质，由于方镁石的热膨胀系 数较大，造成方镁石质的滑动水口的抗热震性较差。为改善抗热震性，一般 以烧结镁砂、海水镁砂为颗粒，电熔镁砂为细粉。由于镁铝尖晶石的热膨胀 系数比方镁石的低，所以将合成尖晶石的颗粒形式加入方镁石质的滑动水口 中，我们开发了抗热震性相对较好的方镁石-尖晶质滑动水口。加入尖晶石的 化学组成以接近理论组成的为好。因方镁石的熔点较高，难以烧结，导致镁质滑动水口的高温强度不高。为了促进其烧结，同时，原位尖晶石将方镁石 晶体结合起来，可提高材料的高温强度。有的镁质滑动水口还进行沥青浸渍， 以进一步提高抗热震性和抗侵蚀性，降低气气孔直径和滑板板面缺陷尺寸， 提高使用寿命。
镁质原料价格相对锆刚玉便宜，所以镁质滑动水口有成本优势。但由于 其抗热震性差，高温强度低限制了其使用寿命，目前镁质滑动水口国内使用 较少，在欧洲还有一定的市场。
发明内容
为了解决上述问题，本发明的目的在于提供了一种具有浇铸钙处理钢和 高氧钢、低碳优质钢开辟了行业新领域，解决了多家钢厂滑板寿命低、耐材 吨钢消耗量大的问题，同时为钢厂节约成本、减少资源浪费，降本增效显著 高性能镁质滑板砖及其制备方法及其制备方法。
本发明的目的可以通过以下技术方案实现：
高性能镁质滑板砖及其制备方法，按重量百分含量计，包含以下组分： 包含以下组分：97电熔镁砂47％～54％、镁橄榄石7％～9％、电熔尖晶石 12％～18％、高温促烧粉4％～6％、陶瓷塑粘剂5％～8％、含碳粉1％～ 3％、石墨1％～3％、碳化硼1％～3％、铝镁合金粉4％～6％、硅粉 2％～4％、上述配方中所有组分重量之和为100％，外加树脂4％～5％， 树脂增强剂0.4％～0.5％。
其各组分的颗粒级配为：97电熔镁砂的颗粒直径(3～1、2～1、1～0.5 mm)和≥200目、镁橄榄石的颗粒直径(1～0mm)、电熔尖晶石的颗粒直径 (0.5～0mm)、高温促烧粉≥200目、陶瓷塑粘剂≥180目、含碳粉为325 目、石墨为325目、碳化硼≥180目、铝镁合金粉≥180目、硅粉≥180 目，所述的树脂和树脂增强剂为液体。
97电熔镁砂的颗粒级配按重量百分含量为：
按重量百分含量计，97电熔镁砂的颗粒级配重量百分含量之和为35％～ 38％。
97电熔镁砂：MgO含量≥97％，所述的镁橄榄石：SiO2含量≤40％、 MgO含量≥45％、所述的电熔尖晶石：Al2O3含量≥72％、MgO含量≥21％、 所述的高温促烧粉：SiO2含量≤30％、Al2O3含量≥72％，所述的陶瓷塑粘剂： 堆积密度约450g/L，所述的含碳粉：残碳量含量为85％、所述的石墨：C 含量≥97％、所述的碳化硼：B4C含量≥90％、所述的铝镁合金粉：Al含量 为50±3％，活性金属(Al+Mg)不小于97.0％，所述的硅粉：Si含量≥97％， 所述的树脂：残碳量45±4％、固含量75～80％、粘度15000～18000mpa。
高性能镁质滑板砖的制备方法，按比例将97电熔镁砂、镁橄榄石、电 熔尖晶石、高温促烧粉、陶瓷塑粘剂、含碳粉、石墨、碳化硼、铝镁合金粉、 硅粉和树脂、树脂增强剂搅拌混合，然后成型并自然干燥，再放入干燥窑中 缓慢升温干燥40～60小时，干燥窑温度不超过180～190℃为宜，然后推 入中高温隧道窑均匀升温到580℃±20℃，保温15～20小时，最后匀速降 温16～25小时即可。
高性能镁质滑板砖及其制备方法，1小时内将干燥窑温度均匀升温到 80℃，且在80℃保温12小时，然后24小时内将温度从80℃均匀上升到190℃，并在190℃下保温20时。
高性能镁质滑板砖及其制备方法，在15～20小时内将温度均匀升温到 580℃±20℃，最后匀速降温20小时。
富镁碱性滑板是一种在高温下非常稳定，且有较高的熔点化合物，它的 热膨胀系数比刚玉材料的要小，其弹性模量介于锆板和刚玉之间，因此它有 较好的抗化学侵蚀性和抗热震性能。
1高性质能镁质材料作为一种碱性的耐材，在浇注钙处理钢时与CaO反 应的速度较慢，相比铝碳、铝锆碳滑板它有优秀的抗侵蚀性能。其次富镁尖 晶石的耐磨性较高，能很好的改善滑板在使用过程中产生拉毛的问题。
2高性质能镁质材料在升降温的过程中也有类似于锆板的相变过程，产 生微裂纹达到提高抗热震的效果。
3但是富镁尖晶石材料相比刚玉和锆质材料其体密较小，气孔率较大，因 此其抗热震稳定性优良。
提高了高温下反应活性很低的碳黑加入量。对泥料的粒度分布及制品的 烧成温度加以改进和控制，提高材料的致密性。同时在基质中添加铝镁合金 粉，使得材料热处理过程中，能在材料表面原位生产惰性化合物，减缓钢水 对滑板的渗透和氧化而提高使用。
该产品主要应用在定型耐火材料基质中，其耐火度大于1800℃，砖坯 在180～250℃干燥后，易促进制品内部结构形成碳结合，在保持制品原有 的常温耐压强度、体密和气孔的条件下：砖坯具有优良的抗热震性、抗剥落 性和抗氧化性，制品韧性增强，能有效提高砖坯在使用过程中受极冷极热的 影响，导致砖坯开裂、剥落而影响使用，从而达到提高使用寿命的目的。
陶瓷塑料剂是一种无机添加剂，用于压制成型、捣打料和挤压成型坯体， 即使添加量较少，都会有增塑的作用，韧性增强，使用混合水作用产生溶涨， 从而产生增塑效果外，还能增加坯体的机械强度。
具体实施方式
高性能镁质滑板砖，按重量百分含量计，包含以下组分：包含以下组分： 97电熔镁砂47％～54％、镁橄榄石7％～9％、电熔尖晶石12％～18％、 高温促烧粉4％～6％、陶瓷塑粘剂5％～8％、含碳粉1％～3％、石墨1％～ 3％、碳化硼1％～3％、铝镁合金粉4％～6％、硅粉2％～4％、上述配 方中所有组分重量之和为100％，外加树脂4％～5％，树脂增强剂0.4％～ 0.5％。
其各组分的颗粒级配为：97电熔镁砂的颗粒直径(3～1、2～1、1～0.5 mm)和≥200目、镁橄榄石的颗粒直径(1～0mm)、电熔尖晶石的颗粒直径 (0.5～0mm)、高温促烧粉≥200目、陶瓷塑粘剂≥180目、含碳粉为325 目、石墨为325目、碳化硼≥180目、铝镁合金粉≥180目、硅粉≥180 目，所述的树脂和树脂增强剂为液体。
97电熔镁砂的颗粒级配按重量百分含量为：
按重量百分含量计，97电熔镁砂的颗粒级配重量百分含量之和为35％～ 38％。
97电熔镁砂：MgO含量≥97％，所述的镁橄榄石：SiO2含量≤40％、 MgO含量≥45％、所述的电熔尖晶石：Al2O3含量≥72％、MgO含量≥21％、 所述的高温促烧粉：SiO2含量≤30％、Al2O3含量≥72％，所述的陶瓷塑粘剂： 堆积密度约450g/L，所述的含碳粉：残碳量含量为85％、所述的石墨：C 含量≥97％、所述的碳化硼：B4C含量≥90％、所述的铝镁合金粉：Al含量 为50±3％，活性金属(Al+Mg)不小于97.0％，所述的硅粉：Si含量≥97％， 所述的树脂：残碳量45±4％、固含量75～80％、粘度15000～18000mpa。 高性能镁质滑板砖的制备方法，按比例将97电熔镁砂、镁橄榄石、电熔尖 晶石、高温促烧粉、陶瓷塑粘剂、含碳粉、石墨、碳化硼、铝镁合金粉、硅 粉和树脂、树脂增强剂搅拌混合，然后成型并自然干燥，再放入干燥窑中缓 慢升温干燥40～60小时，干燥窑温度不超过180～190℃为宜，然后推入 中高温隧道窑均匀升温到580℃±20℃，保温15～20小时，最后匀速降温 16～25小时即可。
高性能镁质滑板砖及其制备方法，1小时内将干燥窑温度均匀升温到 80℃，且在80℃保温12小时，然后24小时内将温度从80℃均匀上升到 190℃，并在190℃下保温20时。
高性能镁质滑板砖及其制备方法，在15～20小时内将温度均匀升温到 580℃±20℃，最后匀速降温20小时。
富镁碱性滑板是一种在高温下非常稳定，且有较高的熔点化合物，它的 热膨胀系数比刚玉材料的要小，其弹性模量介于锆板和刚玉之间，因此它有 较好的抗化学侵蚀性和抗热震性能
实施例1
原料规格如下：
97电熔镁砂：MgO含量≥97％，
镁橄榄石：SiO2含量≤40％、MgO含量≥45％、
电熔尖晶石：Al2O3含量≥72％、MgO含量≥21％、
高温促烧粉：SiO2含量≤30％、Al2O3含量≥72％，
陶瓷塑粘剂：堆积密度约450g/L，
含碳粉：残碳量含量为85％、
石墨：C含量≥97％、
碳化硼：B4C含量≥90％、
铝镁合金粉：Al含量为50±3％，活性金属(Al+Mg)不小于97.0％，
硅粉：Si含量≥97％，
树脂：残碳量45±4％、固含量75～80％、粘度15000～18000mpa。
发明产品基本生产工艺是：按表1中的配方，97电熔镁砂经破碎筛分后 按表1中的配方进行配料，加入湿碾机或高速混练机中混合3～6分钟，加 入树脂结合剂，混匀后再加入如下细粉：97电熔镁砂、镁橄榄石、电熔尖晶 石、高温促烧粉、陶瓷塑粘剂、含碳粉、石墨、碳化硼、铝镁合金粉、硅粉 混合10～30分钟出料。成型采用1000吨以上螺旋压砖机，按照砖的形状、 尺寸，精确称量物料，称量好的料加入到模具内，成型到规定尺寸，每块砖 要测量外形尺寸、平整度、对角线尺寸，每班要抽查10％的单重，每一车砖 要检测气孔率、体积密度，凡发现不合格现象必须报废并查找原因。成型后 的砖坯一般需经自然干燥后才能入干燥窑，砖坯在干燥窑中，1小时内将干 燥窑温度均匀升温到80℃，且在80℃保温12小时，然后24小时内将温度 从80℃均匀上升到190℃，然后在190℃下保温15～20小时，然后推入中高温隧道窑烧成均匀升温580℃，均速升温18小时接着保温15小时即可， 最后匀速降温20小时。为了提高滑板的使用性，防止裂纹的产生和扩大， 要用钢带对滑板周边打箍。为了提高滑板在开拉过程中的灵活性，防止从滑 动面之间漏钢，滑动面要在磨床上进行加工，要求平整度小于0.05mm。磨 制后的滑板经检验合格后，要在背面粘贴石棉垫和马口铁或套铁壳，其作用 主要是减少通过滑板砖传递到滑动机构上热量，防止机构在高温下变形而影响使用寿命。
表2按照表1中3个配方所制得的产品的理化测试指标对照表
根据表2中的检验结果可知：以上3个配方都能正常使用，配方1效果 最佳。
以上所述的仅是发明的一些实施方式，应当指出，对于本领域的普通技 术人员来说，在不脱离本发明的创造构思的前提下，还可以做出其它变形和 改进，这些都属于本发明的保护范围。
Claims (8)
1.高性能镁质滑板砖，其特征在于，按重量百分含量计，包含以下组分：97电熔镁砂47％～54％、镁橄榄石7％～9％、电熔尖晶石12％～18％、高温促烧粉4％～6％、陶瓷塑粘剂5％～8％、含碳粉1％～3％、石墨1％～3％、碳化硼1％～3％、铝镁合金粉4％～6％、硅粉2％～4％、上述配方中所有组分重量之和为100％，外加树脂4％～5％，树脂增强剂0.4％～0.5％。
2.根据权利要求1所述的高性能镁质滑板砖，其特征在于，其各组分的颗粒级配为：97电熔镁砂的颗粒直径(3～1、2～1、1～0.5mm)和≥200目、镁橄榄石的颗粒直径（1～0mm)、电熔尖晶石的颗粒直径（0.5～0mm)、高温促烧粉≥200目、陶瓷塑粘剂≥180目、含碳粉为325目、石墨为325目、碳化硼≥180目、铝镁合金粉≥180目、硅粉≥180目，所述的树脂和树脂增强剂为液体。
3.根据权利要求2所述的高性能镁质滑板砖，其特征在于，所述的97电熔镁砂的颗粒级配按重量百分含量为：
4.根据权利要求3所述的高性能镁质滑板砖，其特征在于，按重量百分含量计，97电熔镁砂的颗粒级配重量百分含量之和为35％～38％。
5.根据权利要求4所述的高性能镁质滑板砖，其特征在于，97电熔镁砂：MgO含量≥97％，所述的镁橄榄石：SiO2含量≤40％、MgO含量≥45％、所述的电熔尖晶石：Al2O3含量≥72％、MgO含量≥21％、所述的高温促烧粉：SiO2含量≤30％、Al2O3含量≥72％，所述的陶瓷塑粘剂：堆积密度约450g/L，所述的含碳粉：残碳量含量为85％、所述的石墨：C含量≥97％、所述的碳化硼：B4C含量≥90％、所述的铝镁合金粉：Al含量为50±3％，活性金属(Al+Mg)不小于97.0％，所述的硅粉：Si含量≥97％，所述的树脂：残碳量45±4％、固含量75～80％、粘度15000～18000mpa。
6.根据权利要求1所述的高性能镁质滑板砖的制备方法，其特征在于，按比例将97电熔镁砂、镁橄榄石、电熔尖晶石、高温促烧粉、陶瓷塑粘剂、含碳粉、石墨、碳化硼、铝镁合金粉、硅粉和树脂、树脂增强剂搅拌混合，然后成型并自然干燥，再放入干燥窑中缓慢升温干燥40～60小时，干燥窑温度不超过180～190℃为宜，然后推入中高温隧道窑均匀升温到580℃±20℃，保温15～20小时，最后匀速降温16～25小时即可。
7.根据权利要求6所述的高性能镁质滑板砖的制备方法，其特征在于，1小时内将干燥窑温度均匀升温到80℃，且在80℃保温12小时，然后24小时内将温度从80℃均匀上升到190℃，并在190℃下保温20时。
8.根据权利要求7所述的高性能镁质滑板砖的制备方法，其特征在于，在15～20小时内将温度均匀升温到580℃±20℃，最后匀速降温20小时。
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