Research and Application of LF Nitrogen Increase Control Technology
WANG Nianxin
ZENG Hui
LUAN Jiyi
CHEN Wanfu
LI Haifeng
Abstract：In order to solve the problem of nitrogen increase in the refining process,small-grained limestone is added to the ladle slag layer in advance,and the CO2 bubbles generated by decomposition are used to form a sealed isolation layer to reduce nitrogen increase.After the implementation,the nitrogen addition rate of the LF refining process was reduced from the original average of 4.55×10-6 to 3.25×10-6,and the proportion of≤5×10-6 of nitrogen was increased from 88.3%to 95.0%,which achieved significant control effects,thereby reducing the cost per ton of steel and improving the quality of molten steel.
Keywords：LFnitrogen contentslagblowing argon
Publication Date：2025-02-20
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 7-9 )