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试验了直流电弧炉炉底用石墨12％～14％，镁砂86％～88％导电捣打料，在不同状态下的电阻车和耐压强度，并用岩相分析研究了试样的显微结构;50kg直流电弧炉炼钢试验表明，该导电捣打料具有良好的导电性和耐侵蚀性。
In the experiment, 12% ~ 14% graphite, 86% ~ 88% conductive ramming material of magnesia at the bottom of DC EAF were tested, and the resistance carriages and compressive strength under different conditions were tested. Structure; 50kg DC EAF steelmaking tests show that the conductive ramming material has good conductivity and erosion resistance.