Usually the performance is a cut of the jet blew force is abate, the lower incision of the remainder of the slag increased, the upper edge of the melt and appear a round, etc.
通常表现是切割射流的吹力减弱，切口下部残留的熔渣增多，上部边缘过熔而出现圆角等。
2
The slag from power plants is a mixture of the remainder of the completely burnt coal and the partly burnt coal, which can neither be used as fuel, nor be used as raw material for cement industry.