结果表明，精炼过程和钙处理后的钢中显微夹杂物均含有钢包渣示踪元素镧；中间包钢样中的显微夹杂物同时含有镧和中间包示踪元素铈；
Results show that the micro-inclusions in steel both in the refining process and after calcium treatment include La which is the tracer in ladle slag.
钢包精炼炉的泡沫渣精炼工艺是提高热效率、降低生产成本的有效手段。
The technology of foaming slag refining is a effective method to improve heating efficiency and reduce the cost.
结果表明，精炼过程和钙处理后的钢中显微夹杂物均含有钢包渣示踪元素镧；
Results show that the microinclusions in steel both in the refining process and after calcium treatment include La which is the tracer in ladle slag.
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