首钢京唐300t钢包用上水口的试验研究

Experimental study on upper nozzle for 300t ladle of Shougang Jingtang Steel

以棕刚玉、板状刚玉、锆莫来石、单质硅、氧化铝微粉以及石墨等为主要原料,热固性酚醛树脂为结合剂,制备了钢包用上水口试样,研究了混练工艺及原料组成对泥料性能的影响。结果表明:(1)新的混练工艺使泥料的自然堆积密度提高,并且物料分散均匀,尤其树脂对颗粒料的包裹较好,石墨分散均匀。(2)新的材料体系加入了锆莫来石等原料,使材料的抗热震性有所提高,材料更加致密。(3)试验水口满足了钢厂的需求,尤其抗热震性比之前大大提高。

The specimens of upper nozzle for ladle were prepared using brown corundum,tabular corundum,zirconia-mullite,silicon,Al2O3 micropowder,and graphite as main starting materials,and thermoset phenolic resin as binder.The influences of mixing process and formulations on the properties of specimens were studied.The results show that：（1）the new mixing process increases the packing density of the mud and helps the materials distribute homogeneously,especially the aggregate grains are well packed by the resin and the graphite distributes evenly;（2）the addition of zirconia-mullite improves the thermal shock resistance and the density of the material;（3）the test nozzle satisfies the requirements of the steel works,especially the thermal shock resistance is remarkably improved.