The refining time shall be extended along with increase of aluminium melting volume.
精炼时间随熔铝量的增加而延长。
During the high rate heavy rail steel smelting, the upper basicity slag can be used during the LF refining, but it reduces suitable basicity of slag and refining time during the RH refining.
高速重轨钢的冶炼可以在LF精炼过程中采用较高的炉渣碱度，而在RH精炼过程中，应适当降低炉渣碱度和减少精炼时间。
During the high rate heavy rail steel smelting, the upper basicity slag can be used during the LF refining, but it reduces suitable basicity of slag and refining time during the RH refining.
高速重轨钢的冶炼可以在LF精炼过程中采用较高的炉渣碱度，而在RH精炼过程中，应适当降低炉渣碱度和减少精炼时间。
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