The Problem It Solves
During production, wire exits the manufacturing process at very high temperatures. To cool it down quickly and safely, it is passed through a water bath or cooling channel. The water does its job by absorbing the heat from the wire but in doing so, it gets hot itself.
Without a recycling system, there are only two options: keep adding fresh cold water continuously (wasting enormous quantities of water) or discharge the hot water and replace it. Neither is acceptable. Water cooling plant eliminates both problems entirely.