Abstract：In order to explore the effect of heating rate and pre-melting on melting point and reveal the volatility characteristics of fluorine-containing slag at high temperature,a combined experiment of hemispherical melting point detection and thermogravimetry(TG)was taken. The melting point and volatilization characteristics of the fluorine-containing slag system were investigated under different heating rates and pre-melting processes. The results showed that the weight loss rate of fluorine-containing slag was 5%-17% during the melting point determination and it increased with the heating rate decreasing. There was almost no influence on the melting point of the fluorine-free slag before and after pre-melting,and for the fluorine-containing slag,the difference between the melting point of the mixed and the pre-melted slag was nearly 70 ℃. The reason for the difference was not the change of the phase composition,but the mixed slag had obvious volatilization. When is reached,the weight loss of the mixed slag was 8.3% at the melting point and that of the pre-melted slag was only 2%. There was a large amount of free CaF2 in the mixed slag sample,and for the pre-melted slag,CaF2 was mostly in the form of calcium fluoroaluminate and cuspidine. It provided a theoretical basis for exploring the effect of volatilization on high-temperature properties such as the melting point of fluorine-containing slag.
赵忠宇, 赵俊学, 谭泽馨, 屈波樵, 卢亮, 崔雅茹. 升温速率与预熔过程对含氟渣熔点影响分析[J]. 钢铁, 2020, 55(6): 123-128.
ZHAO Zhong-yu, ZHAO Jun-xue, TAN Ze-xin, QU Bo-qiao, LU Liang, CUI Ya-ru. Effect of heating rate and pre-melting process on melting point of fluorine-containing slag. Iron and Steel, 2020, 55(6): 123-128.
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2020, Vol. 55 
