对锰硅合金冷凝及破碎为规格粒度过程中产生粉末的原因进行了分析，提出了防止和降低破粉率的措施和方法。
The causes of producing fine during ferromanganese-silicon cooling and crushing is analyzed. The measures and methods are put forward to prevent and reduce degradation index during crushing.
速度比较大、刀盘倾角较小、振幅与频率较小、刀片数量为4把时可以获得较小的破头率。
We'll acquire the small broken rate when speed ratio is big, the angle of knife dish is small, amplitude and frequency is small, the number of blade is 4.
对比实验研究表明：声强、辐照时间和频率是影响破乳脱水率的主要因素，而实验温度、工作方式、沉降时间等为次要因素。
The contrasting results show that sound intensity, radiation time and frequency are the main factors, and the secondary factors are test temperature, working mode and settlement time.
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