Characteristics of heat flux through slag film of mold slag used for high Al-TRIP steel casting
Characteristics of heat flux through slag film of mold slag used for high Al-TRIP steel casting
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DOI：
10.1016/s1006-706x(10)60092-1
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发表时间：
2010-05
影响因子：
2.5
通讯作者：
Xiongjun Yu;G. Wen;P. Tang;Bo Yang
中科院分区：
文献类型：
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作者：
Xiongjun Yu;G. Wen;P. Tang;Bo Yang
由于Al-TRIP钢中Al含量较高，在连铸过程中，Al与结晶器渣中的SiO2发生反应，导致渣膜中Al含量增加，Al 2 O3含量增加，从而改变了渣膜的传热特性，影响了连铸过程的顺利进行。利用渣膜热流模拟器研究了渣膜热流密度的变化趋势，并对结果进行了讨论;同时利用BSE和XRD对15号结晶器渣中的晶体进行了表征。结果表明，热流密度随掺量的增加而减小。在Al 2 O3含量为30%的结晶器渣中，随着Li 2 O和/或B 2 O3含量的增加，热流密度增加。通过与普通转炉渣的热流密度对比，设计了一种合适的含4% B 2 O3和4% Li 2 O的保护渣。当温度升高时，热流密度为0.645MW/m2。在本实验条件下，Al-TRIP钢结晶器渣中析出CaF 2晶体。
Due to the high content of the Al-TRIP steel, Al reacts with SiO 2 in the mold slag during the casting process, which results in the increase ofratio and the Al 2 O 3 content, respectively; the characteristic of heat transfer through the slag film is then changed, which influences the smooth operation of the continuous casting process. The heat flux simulator of mold slag film was used to study the change tendency of the heat flux density through slag film and the results were discussed; at the same time, the characteristics of the crystals in the No. 15 mold slag were determined by BSE and XRD. The results obtained show that heat flux density decreases with the increase ofratio. Heat flux density increases with the increase of Li 2 O and/or B 2 O 3 content in the mold slag which contains 30% of Al 2 O 3. Compared with the heat flux density of common slag of peritectic steel, a suitable mold slag containing 4% of B 2 O 3 and 4% of Li 2 O is designed. The heat flux density is 0.645 MW/m 2 when. Under this experimental condition, the CaF 2 crystals precipitate in the mold slag used for Al-TRIP steel.