亚共晶铝硅合金的变质元素除钠以外，还有锶、碲、钡、锑、钾、稀土、硼、硫等。其中，应用较多的是含钠和锶的变质剂。
The modifying elements used in hypoeutectic Al Si alloys, besides Na, there are also Sr, Te, Ba, Sb, K, RE, B, S, etc.
研究了超声波处理时间对工业纯铝铸锭结晶组织的影响，即添加除气剂又进行超声波处理的情况。
In this study, the effect of ultrasonic treatment time on crystallization structure of industry pure aluminum ingots was investigated.
系统研究以硫酸铝和聚铝为絮凝剂时絮凝DAF工艺中的水力学参数对除浊率的影响。
The hydraulic parameters in coagulation, flocculation and flotation units of DAF pilot process were systematically investigated when employing flocculants AS and PAC respectively.
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