The aim of this project was to research and implement an environmentally efficient continuous flux treatment system. Potential treatment systems were identified and the best available technical, commercial and environmental solution was implemented.
The system chosen removes dissolved iron from the flux solution continuously, which means that the site no longer needs to dispose of the entire contents of the flux baths. Reducing the iron content has also reduced the production of unwanted by-products, which will generate significant raw materials savings. In addition to treatment of the galvanising flux, the system installed in the Dublin plant also allows for the treatment and reuse of spent stripping acid which is rich in zinc chloride; further reducing the waste which needs to be exported off site.
Two treatment units were installed, one in each of the Dublin and Cork plants. The systems have performed well to-date and the initial results achieved have been quite good. The reduction in unwanted by-products in the flux bath is expected to reduce zinc consumption by approximately 63 tonnes. Costs associated with exporting 130 tonnes of spent acid will also be eliminated.
Annual net savings generated by the onsite treatment of flux amount to over €122,000 per annum.
For additional details, download the Galco Steel PDF.
