The results of industrial tests show that secondary oxidation of liquid steel at the initial stage of casting process is a major factor for the increasing oxygen content of steel.
工业试验结果表明，在连铸生产过程中，开浇阶段钢水的二次氧化是钢中氧含量增加的主要原因。
The preparation method utilizes industrial sulfuric acid to leach waste iron residue in oxygen and at normal pressure under reasonable production process and operation conditions.
介绍了以废铁渣为主要原料与工业硫酸反应制备三氧化二铁，产生的废液加氧化钙生成副产物硫酸钙的工艺。
The preparation method utilizes industrial sulfuric acid to leach waste iron residue in oxygen and at normal pressure under reasonable production process and operation conditions.
介绍了以废铁渣为主要原料与工业硫酸反应制备三氧化二铁，产生的废液加氧化钙生成副产物硫酸钙的工艺。
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