【摘要】 根据真空冶金原理,通过热力学分析,采用正交设计实验方法,研究了真空度、脱铜剂种类与用量、温度以及处理时间等对钢液去铜的影响·试验结果表明:真空条件下,加入脱铜剂尿素或氧化镁,钢液中的铜可以明显去除,能满足大部分钢种所要求的标准(w(Cu)<0 2%);比较两种不同的脱铜剂的脱铜效果发现,在相同条件下,尿素的脱铜效果明显好于氧化镁;随着脱铜剂用量增加、脱铜时间延长以及温度的提高,去铜率明显增加;当脱铜剂尿素用量为0 7%,脱铜处理时间40min,能够满足洁净钢质量的要求·在实验室研究的基础上,对工业化试验提出了初步的设想·更多还原

【Abstract】 The investigation was done through thermodynamic analysis and orthogonal designed lab tests to determine the optimal conditions for copper removal from molten steel on the principle of vacuum metallurgy. The effects of vacuum tightness, copper removal reagents selected and their amounts, melting temperature and removing duration on the removal rate were studied. The results showed that adding such reagent as either MgO or CO（NH₂）₂ into molten steel can remove copper obviously to the criterion w（Cu）<02% which most of steel grades require. However, by a comparison made for copper removal rates, CO（NH₂）₂ is better than MgO under the same conditions. The removal rate will increase greatly with the increasing reagent amount, removing duration and melting temperature. Copper can be cleaned out best in steel if in a 40?min removing duration 07% of CO（NH₂）₂ is used as copper removal reagent. Based on the lab test, an industrial test scheme was envisaged preliminarily.更多还原