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在BOF炉钢水温度达1550℃而且通氩气的条件下,通过单孔和双孔镁碳质透气塞的侵蚀试验,对透气塞间的相互作用进行了研究。就使用条件与多孔塞类似的双孔侵蚀试件而言,两个喷孔按不同的中心距设置在耐火材料上。试验结果表明,在喷孔间距为12mm而且通过每个喷孔的氩气流量为10l/min的情况下,由于喷孔周围的强侵蚀区域重叠,耐火材料的侵蚀是严重的。当喷孔间距增大到24mm以上时,耐火材料的侵蚀可减轻到使用单孔时的侵蚀程度。如果喷孔间距小于50mm,喷孔的切变区域就会重叠,在喷孔周围形成一个椭圆形的切变侵蚀区。在喷孔间距达到 50mm 时,喷孔间的相互作用对耐火材料的侵蚀的影响就看不到了。根据试验结果和旋涡式扩展的侵蚀机理,我们对估算、减轻和避免因喷孔间的相互作用而引起的机械侵蚀影响的各种方法进行了讨论,并提出了建议。
The interaction between the gas permeable plugs was investigated by the erosion test of the single-hole and double-hole magnesium carbon breathable plugs under the condition that the temperature of the molten steel in BOF furnace reached 1550 ℃ and the argon flow was passed. In the case of two-hole erosion test pieces, which are similar to porous plugs, the two injection holes are arranged on the refractory material at different center distances. Test results show that refractory erosion is severe due to the overlap of highly eroded areas around the injection holes with a nozzle spacing of 12 mm and an argon flow rate of 10 l / min through each orifice. When the spray hole spacing is increased to more than 24mm, the erosion of refractory material to reduce the use of single hole erosion. If the orifice spacing is less than 50 mm, the shear zones of the orifice overlap and form an elliptical shear erosion zone around the orifice. The effect of the interaction between the orifices on the erosion of the refractory material can not be seen when the spray hole spacing is up to 50 mm. Based on the experimental results and the vortex-spreading erosion mechanism, various methods for estimating, mitigating and avoiding the effects of mechanical erosion caused by the interaction between spray holes are discussed and suggestions are made.