不同造孔剂对钢包永久衬用隔热浇注料的影响

发布时间：2018-05-10 19:40

本文选题：钢包 + 隔热浇注料　；参考：《硅酸盐通报》2017年09期

【摘要】：钢水冶炼过程中通常利用保温隔热材料来提高钢包周转过程中的保温性能,以保证连铸钢水温度的变化适应炉外精炼过程和连铸过程的工艺需要。为了研制高气孔率、高强度的保温隔热材料,以烧结莫来石为骨料,研究了四种不同造孔剂(菱镁矿粉、聚苯乙烯球、塑料颗粒和漂珠)对浇注料显气孔率及强度的影响。实验结果表明添加菱镁矿粉作造孔剂时,与未添加或添加其他造孔剂相比,烧后试样显气孔率较低,而且当加入量超过10%时,试样强度出现显著提升;添加聚苯乙烯球、塑料颗粒或漂珠做造孔剂均能够明显提升烧后试样的显气孔率,其中添加聚苯乙烯球、塑料颗粒的试样随着造孔剂引入量的增加强度出现明显降低,而添加漂珠的试样随漂珠引入量的增加强度变化不明显;复合添加10%菱镁矿粉和5%塑料颗粒时试样气孔率为29.34%、耐压强度为42 MPa,体积密度为1.98 g·cm-3,综合指标最高,最适合于做为莫来石质钢包保温隔热浇注料的造孔剂。
[Abstract]:In the process of molten steel smelting, thermal insulation material is usually used to improve the thermal insulation performance in the process of ladle turnover so as to ensure that the temperature of the molten steel is adapted to the process of refining and the process of continuous casting. In order to develop high porosity, high strength thermal insulation material and sintered mullite as aggregate, four different holes are studied. The effects of magnesite powder, polystyrene ball, plastic particles and floating beads on the apparent porosity and strength of the castable were investigated. The experimental results showed that when adding magnesite powder as pore making agent, the apparent porosity of the sample was lower than that of adding or adding other pore making agents, and the strength of the sample increased significantly when the addition of more than 10%, and the addition of polystyrene was found. Ethylene balls, plastic particles or floating beads can obviously improve the apparent porosity of the specimens after burning, and the addition of polystyrene balls, the increase of the strength of the plastic particles with the increase of the amount of pore making agents obviously decreases, and the increase of the increase of the sample adding floating beads is not obvious with the introduction of the drifting beads; a compound of 10% magnesite powder is added to the sample. The porosity of the sample and 5% plastic particles is 29.34%, the compressive strength is 42 MPa, the volume density is 1.98 g cm-3, and the comprehensive index is the highest. It is the most suitable for making the pore forming agent for the thermal insulation castable of the mullite ladle.

【作者单位】：辽宁科技大学高温材料与镁资源工程学院;鞍山市东磊耐材有限公司;
【分类号】：TQ175.732

【相似文献】