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1·This paper analyzes the essential scumming reasons for magnesite product and every kind of modified measures and results used normally now.

分析了菱镁制品返卤泛霜的根本原因及目前常用的各种改性措施及效果；

2·Through test and research for many new mixing active modifier added and new treatment method, the appearance of scumming for magnesite product is obviously inhibited on the above base.

在此基础上，通过添加多种新型混合活性改性剂及新的处理方法的试验研究，使菱镁制品返卤泛霜现象得到明显的抑制。