电磁出钢装置中座砖内温度分布的分析

Analysis of Temperature Distribution in Nozzle Pocket Brick of Electromagnetic Steel-Tapping Device

针对钢包电磁引流技术中,钢包不是固定装置,现场流动性比较强,无法对感应线圈进行连续冷却这一技术难点.提出了将座砖做成内外组合式,把感应线圈镶嵌到内部座砖里,然后在线圈的顶端和内侧添加高温隔热材料,来减少热量向线圈传递,防止没有水冷时线圈因温度过高而失去工作能力.在实验室条件下,对座砖内温度分布进行了测试,并以此为不同材质的隔热板隔热性能的高温实验做出指导,结果表明:通过添加40mm厚蛭石隔热板后,当高温面温度达到1 000℃,而低温面温度为294℃,低于铜的再结晶温度,线圈处于能够工作温度范围内.

In the technology of electromagnetic-tapping of ladle,the ladle isn＇t a fixed equipment and has a strong on-site mobility,so it＇s difficult to give the induction coil continuous cooling.A solution was proposed by making the nozzle pocket brick into inside-outside combination,and inserting the induction coil into the internal brick and adding high-temperature insulation materials inside and at the top of the coil,which reduces heat transfer to the coil and prevent overheat from losing the ability to work without water cooling.Under laboratory conditions,the temperature distribution of the nozzle pocket brick was tested,and was used for different material＇s insulation to make for experimental guidance.The results showed that after vermiculite insulation board 40 mm thick is added,when the temperature of the high temperature surface reaches to 1 000 ℃ and that of the low temperature surface reaches to 294 ℃,which is below the recrystallization temperature of copper,the coil is working in the operating temperature range.