In basic refining operations lime is added to the stock to form a basic slag, which can combine with phosphorus and sulphur, thus removing them from the metal.

• 在碱性法精炼过程中，炉料加有石灰，能生成碱性渣，而碱性渣能与磷、硫生成化合物，从而将磷和硫从钢水中除去。