With the same principle of liquid-liquid separation, neutral oil floatation can increase the grade of SiC whisker to above 50% after floatation in optimal condition of Kerosene, 3ml/g; Abies oil, 1.5ml/g.

• 与液-液萃取原理相似，用技术成熟、处理量大的中性油浮选法分选，在捕收剂煤油用量为3ml/g、起泡剂松醇油用量为1.；5ml/g时，浮选后所得的SiC晶须品位为50%25以上。