国内外生产球墨铸铁大多以铈基稀土镁硅铁合金作球化剂,厚大型铸件也有以钇基稀土镁硅铁合金作球化剂的。但在我国的稀土资源中,除含有丰富的铈与钇元素外,还含有丰富的镧,特别是南方离子型稀土矿在提取了钐、铕、钇等元素后,或是四川矿、包头矿在提取了铈、钐、铕及钇元素后,都会生产出富 Most domestic and foreign production of ductile iron cerium-based rare earth magnesium ferrosilicon alloy as a ball agent, thick castings also have yttrium-based rare earth magnesium ferrosilicon alloy for the nodulizer. However, rare earth resources in China, in addition to rich in cerium and yttrium, but also rich in lanthanum, especially the southern ion-type rare earth mine in the extraction of samarium, europium, yttrium and other elements, or the Sichuan Iron Mine, Baotou Mine The extraction of cerium, samarium, europium and yttrium elements, will produce rich