环氧树脂粘结剂提高复合脱氧剂落下强度的试验及应用

针对当前洁净钢用Al-CaO复合脱氧剂从10 m高料仓落下使用过程中易粉碎导致使用率低,成本增加,现场起尘污染等问题,研究了Al-CaO复合脱氧剂细粉中添加环氧树脂、改性淀粉等粘结剂,其含量（0~2.5%）,粘结剂固化温度（180~350℃）对复合脱氧剂落下强度的影响。结果表明,环氧树脂优于改性淀粉;随环氧树脂含量增加,复合脱氧剂落下强度增强,环氧树脂含量>2.0%后,粉碎率无明显变化;当环氧树脂加入量为2.0%,350℃固化时,复合脱氧剂粉碎率最低为17.5%。对RH精炼的EH40钢所用Al-CaO复合脱氧剂添加环氧树脂的应用表明,添加后明显提高复合脱氧剂的落下强度,降低了现场起尘污染和冶污成本。

Test on Increasing Drop Strength of Complex Deoxidizer by Epoxy Resin Binder and Application

According the issue of Al-CaO complex deoxidizer for clean steel easily crushing during process of falling from 10 meters high burden bin led to low utilization, increase of cost and dust pollution in situ, the effect of adding epoxy resin, modified starch etc binders with 0-2.5% content in Al-CaO complex deoxider fine powder and binder curing at 180-350 °C on drop strength of complex deoxidizer has been studied. Results show that the epoxy resin is better than modified starch, with increasing epoxy resin content the drop strength of complex deoxidizer increases, and as the epoxy resin content is more than 2.0% , the crushing rate is no-obvious change; with adding 2.0% epoxy resin and curing at 350℃ , the crushing rate of complex deoxidizer is minimum that is 17.5%. The application o£ adding epoxy resin in Al-CaO complex deoxidizer for EH40 steel in RH refining show that with adding epoxy resin the drop strength of complex deoxidizer increases obviously to decrease the dust pollution in situ and the cost for control pollution.