OPTIMIZATION OF CONTINUOUS HOT DIPPED GALVANIZATION LINES THROUGH THE ADDITION OF A HOT COATING WEIGHT SENSOR

The ability to reliably measure the zinc coating directly above the pot allows for dramatic improvements in hot dipped galvanizing line performance. The feedback time for air knife control is nearly instantaneous. When coupled with intelligent control software in a complete coating weight auto-control system, a "hot" coating weight gauge can reduce overcoating to save raw materials, avoid undercoating and increase overall mill yield. While this location significantly improves coating weight auto-control performance due to short dead length between air knife and measurement, the environment presents electrical, mechanical, and thermal challenges that must be considered in the final sensor design.