在稀土镁硅铁合金中，镁的球化能力较强；稀土的球化能力次于镁，但脱硫、去气能力强，白口倾向大，含量过高时容易使石墨球形恶化，因此建议根据原铁液硫量选择残留稀土量以及合金中的稀土含量。原铁液流量低，应选择较低的残留稀土量，合金中的稀土量就相应较低，反之，稀土? In rare earth magnesium ferrosilicon alloy, magnesium nodularity is stronger; rare earth nodularity is inferior to magnesium, but desulfurization, strong de-gassing ability, white mouth tend to be large, the content is too high, it is easy to make the graphite spherical, so it is suggested that The original choice of iron liquid sulfur residual amount of rare earth and alloy rare earth content. The original iron liquid flow rate is low, should choose a lower residual rare earth, alloy in the corresponding lower amount of rare earth, on the contrary, rare earth?