【摘要】 通过对大连钢厂30t电弧炉炉衬内表面温度的测定、分析与讨论,得出如下结论:1)电弧炉内,炉衬内表面温度分布不均衡,它与三相电弧功率不平衡度有对应关系。在试验条件下,测点中的最高温度为1596℃(5号点),三个“准热点”温度差异最高达12.4％,冷、热点的温度差为160～300℃,炉衬上、下温度梯度为0.29～0.61℃/mm。2)三相电弧功率不平衡度除与短网阻抗不平衡度有一定关系外,还受供电制度的影响。当二次电压提高时,电弧功率不平衡度变小;二次电流增加时,该值增大。3)电弧炉采用长电弧辅以泡沫渣保护的操作,对实现经济用电与获得好的炉内热工状况是有利的。更多还原

【Abstract】 A 30t electric arc furnace was put to test for measuring its temperature distribution on the inner surface of lining. The results are discussed and concluded as follows.A. In an electric arc furnace there indeed exists an unbalance in temperature distribution on the inner surface of lining, which is in correlation with the degree of unbalance in 3-phase AC arc power. Under the testing conditions the highest temperature measured was 1596℃ (at point 5), and the maximum temperature discrepancy among three pseudo-hot points was 12.4%. The temperature difference between cold and hot points was in a range from 160℃ to 300℃, and the temperature gradient from the upper to lower part of the lining was 0.29 to 0.61℃/mm.B. The unbalance in 3-Phase AC arc power not only related to the degree of unbalance in shortcircuit network impedance to a certain extent, but also influenced by the power supply schedule. The unbalance of arc power decreases as the secondary voltage increases, while it increases as the secondary current increases.C. It is advantageous to operate with a longer arc and a foaming slag for saving electric energy and reaching more uniform thermal condition in arc furnace.更多还原