Pre-flux
Iron Removal – Chemical Process
The effects of
carry-over of ferrous iron into the kettle on the work is well known but few
galvanizers have been successful in applying control to the degree necessary to
achieve the potential zinc savings.
WICA Machinery has
researched the problems and has developed a technically supported programme
which offers the galvanizer a meaningful opportunity to change the situation
and in so doing to:
- Radically reduce dross
- Increase the fluidity of the molten alloy
- Allows the use of nickel an economic proposition
The chemical
process used is the oxidation of ferrous iron to ferric iron with hydrogen
peroxide.
The equally
important pre-flux management software sees ferrous iron maintained at or below
0.5 g/l, the pre-flux solution maintained as a balanced salt and the nature of
the pre-flux maintained such that it does not corrode the work to form more
ferrous iron