Abstract：The working principle, structure, control process and application of double slide slag tapping technology in Qiansteel 210 t top and bottom blowing converter were introduced. Taking X65 steel as an example, the double slide slag tapping technology was compared with the original slag cone slag retaining process. The comparison results showed that the converter tapping time was extended by 69 s, the success rate of slag stopping was 99.9%, the slag detection index decreased by 323, the average thickness of ladle slag decreased by about 18 mm, the phosphorus content in molten steel in LF refining decreased 0.001 4%, the silicon and manganese alloy yield were increased by 1.69% and 1.25%. The frequency of the burnt cable by the scattered steel slag during tapping, which was decreased from 2 times/month to 1 times /season for a converter. The purpose of improving the quality of steel and reducing cost was realized.
2018, Vol. 28 
