中间包用环保型镁质干式料的研究

为了解决目前广泛使用的酚醛树脂结合的镁质干式料危害环境和工人健康的问题,首先通过对比单独使用酚醛树脂、葡萄糖、水玻璃、柠檬酸为结合剂的干式料的脱模强度,初步确定以葡萄糖代替酚醛树脂作为环保型干式料的结合剂;然后与酚醛树脂结合的干式料对比,研究了以不同比例的葡萄糖和水玻璃为复合结合剂的干式料低温、中温、高温处理后的性能指标。结果表明:用5%(w)葡萄糖+1%(w)水玻璃复合结合剂代替酚醛树脂制备干式料,低温和高温处理后干式料的性能与酚醛树脂结合的基本相同,中温性能优于酚醛树脂结合的,复合结合剂试样产生的烟气明显少于酚醛树脂结合的,可以达到环保的目的,是一套可行方案。

Research on environmental-friendly magnesia based dry vibration mix for tundish

The magnesia based dry vibration mix using phenolic reisn as binder is harmful to environment and workers.In order to solve the problem,the demolding strengths of dry vibration mix for tundish were compared with phenolic resin,glucose,water glass,and citric acid as binder,respectively.Glucose was confirmed firstly to replace phenolic resin as environmental-friendly binder for dry vibration mix.The performance of dry vibration mix using composite binder containing glucose and water glass treated at low,middle and high temperatures were researched by comparing with that of dry vibration mix using phenolic resin as binder.The results show that the performance of dry vibration mix using composite binder containing 5 mass% glucose and 1 mass% water glass is almost the same to that of the mix using phenolic resin treated at low and high temperatures,and the performance of the mix treated at middle temperatures is better than that of the mix using phenolic resin,smoke of the mix using composite binder is obviously less than that of the mix using phenolic resin,so it is environmental-friendly.