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钢锭模内采用石墨渣保护浇注、吊挂稀土金属棒的加入方法,是根据稀土元素的化学活性,科学地将稀土金属加入到没有炼钢炉渣、没有耐火材料、没有空气供氧的钢液中。完全避免了水口结瘤、汤道堵塞现象;能显著降低钢中氨含量,消除低倍稀土夹杂物孔洞缺陷;稳定提高稀土回收率达65～85％;钢中稀土分布比较均匀;可使钢中长条状的硫化锰夹杂物转变为20微米以下的细小球状稀土夹杂物。这一加入方法,能稳定稀土在钢中的优良作用。
The ingot mold adopts graphite slag to protect pouring and hangs the rare earth metal rod. According to the chemical activity of the rare earth element, the rare earth metal is added into the molten steel without steelmaking slag, refractory material and air supply without oxygen . Completely avoid the nozzle nodules, Tang Road plugging; can significantly reduce the ammonia content of steel to eliminate rare earth inclusions hole defects; stability of rare earth recovery rate of 65 to 85%; rare earth distribution of steel more evenly; can make steel Long strip of manganese sulfide inclusions into small spherical rare earth inclusions below 20 microns. This addition method, can stabilize the excellent role of rare earth in steel.