求翻译：冲渣沟用水须循环使用，这样既节约用水，也免得流入江河造成污染。另外设有干渣坑作为炉渣处理的备用手段，用于处理开炉初期炉渣、炉况失常时中带铁的炉渣，以及在水渣系统事故检修时的炉渣。是什么意思？

Slag ditch water to be recycled, so not only save water, and also avoid the inflow of rivers caused by pollution. Another with dry slag pit as an alternate means of slag treatment for dealing with the early open furnace slag, furnace conditions disorders with iron slag and slag in the water residue

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The flushing cinder ditch water used must circulate the use, like this already saves the water used, so as to avoid also flows in the rivers and streams to cause the pollution.Moreover is equipped with does the dregs pit to take the slag

Water recycle of washing trough, which save water, that flow into the river pollution. Also has a dump as alternate means of slag, used to open early furnace slag, slag with iron in the furnace when the situation, and slag in slag system maintenance.