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针对球铁铸管内壁渣多、延伸率合格率低、压扁率合格率低等问题，应用低稀土低硅球化剂进行了实验，结果显示：球铁铸管渣量减少，延伸率合格率、压扁率合格率分别提高了２５．３％ 和１９．４％ 。
In view of the problems that the inner wall of the ductile iron pipe has a lot of slag, the pass rate of the elongation is low and the pass rate of the calendaring is low, the experiment was carried out by using the low-rare earth low-silica nodulizer. The results showed that: Rate, crush rate of pass rate increased by 25.3% and 19.4%.