为了避免有氟渣的氟污染问题，结合炉渣基础理论，设计开发出了CaOAl2O3MgOSiO2系无氟精炼渣。精炼渣的工业应用表明，该渣能满足BOFLFCC工艺生产石油套管钢（37Mn5、34Mn5）的要求，钢管的实物质量达到美国石油行业API.5CT标准，并可使LF精炼操作时间由42 min缩短到35 min，为高效生产和快节奏奠定了基础。与常规有氟渣相比，避免了氟污染问题，且达到了脱氧、脱硫效果好，精炼初期成渣快、发泡埋弧效果好及包衬侵蚀较轻的目的。
In order to avoid the fluorine pollution, the LF refining premelted CaOAl2O3MgOSiO2 slag without CaF2 was developed based on the molten slag theory. The industrial practice showed that the slag was suitable for the BOFLFCC route to produce oilwell pipe steel such as 37Mn5 and 34Mn5, etc, according to the standard of API.5CT of USA, and the operation period of LF refining was decreased from 42 min to 35 min, establishing the foundation of high efficiency production and short production cycle. Meanwhile the slag, compared with the slag with CaF2, has good properties for desulphurization, deoxidation, and arc submerging, quick slag forming at the beginning of refining and foaming, as well as the advantages of lower lining erosion and no pollution of fluorine.
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