Crude zinc ashes (also called zinc skimmings) are the residues left behind in the galvanising bath after the hot dip galvanising of steel. The zinc ashes appear as a thin layer on the surface of the galvanising bath, and are removed after each cycle. Among other things, Rezinal processes zinc ashes received from hot-dip galvanising (construction), zinc-coating of s, and zinc smelting residues. An ecological solution, since it keeps the chain closed, and zinc ashes are converted into valuable raw materials