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电炉的二次短网一般由铜排、软铜缆、导电铜管等搭接组成,在搭接处会形成较大的接触电阻,长期通电后接触电阻又会成倍的增加,是电炉短网节电改造中的一个重要环节。为了减少短网搭接处的接触电阻,国外一般采用镀银或镀锡的方法,国内也有采用镀锡的方法来减少电炉二次短网接触电阻损失以达到节约电能的目的。 短网搭接表面采用镀银或镀锡工艺的本身也要耗费大量的电能和贵重金属,且效率低。1987年我厂首先在三台碳素铬铁矿热式电炉二
The secondary short circuit of the electric furnace is generally composed of a copper bar, a soft copper cable, a conductive copper pipe and the like, which forms a large contact resistance at the lap joint, and increases the contact resistance after the long-term power-on. Network energy-saving transformation in an important part. In order to reduce the contact resistance at the lap overlap, foreign countries usually use the method of silver plating or tin plating, and the domestic also adopts the method of tin plating to reduce the secondary short-circuit contact resistance loss of the electric furnace in order to save energy. Short mesh lap surface using silver or tin plating process itself also consume a lot of electricity and precious metals, and low efficiency. In 1987, I first plant in three carbon chromite thermal electric furnace two