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发明公开
CN101768001A 耐火度炉用镁砂管及其制备方法 无效 - 驳回

耐火度炉用镁砂管及其制备方法
摘要：
本发明提供一种耐火度炉用镁砂管，其组分为高纯电熔镁砂、氧化铬微粉、树脂或聚乙烯醇。各组分的重量百分比为：粒度1～0.5mm的电熔镁砂30～60％，粒度0.5～0mm的电熔镁砂10～30％，320目电熔镁砂20～50％，氧化铬微粉1～10％，树脂或聚乙烯醇3～10％。其制备方法为，将电熔镁砂、氧化铬微粉、树脂或聚乙烯醇混合造粒，装入橡胶模具，放入等静压机的工作缸内进行静压成型，然后脱模、烘烤。采用本专利生产的镁砂管使用寿命可达到12次，比原用的浇注成型镁砂管使用寿命提高3～4倍。
摘要（英）：

The invention provides a refractory furnace magnesite tube, which comprises high-purity fused magnesite, micro chromium oxide powder and resin or polyvinyl alcohol in percentage by weight: 30-60 percent of fused magnesite with the particle size being 1-0.5mm, 10-30 percent of fused magnesite with the particle size being 0.5-0mm, 20-50 percent of 320-mesh fused magnesite, 1-10 percent of micro chromium oxide powder and 3-10 percent of resin or polyvinyl alcohol. The preparation method comprises the following steps: mixing the fused magnesite, the micro chromium oxide powder and the resin or polyvinyl alcohol for granulation, adding the mixture into a rubber die, placing the rubber die into the working cylinder of an isostatic pressing machine for static formation, stripping the die and baking. The using time of the magnesite tube produced in the invention can reach 12 times, being improved by 3-4 times compared with the using time of the original magnesite tube formed by casting.

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