转炉氧枪喷头损坏的机理是什么?怎样才能提高喷头的寿命?
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For gypsutn products,a suitable accelerator and retarder,respectively,would be()
A. ethyl aleohol and oleic acid
B. oleic asid and glycerin
C. borax and potassium sulfate
D. potassium sulfate and borax
分析在现行炼钢条件下,终点钢水中残余[Si]、[Mn]含量及原因?