Patent ID: 6105850
Filing Date: 2000-08-22
Classification: B23K

Abstract:
A method of brazing components made of aluminium or an aluminium alloy, said method comprising the steps of:bringing an excess amount of an aqueous flux preparation selected from the group consisting of potassium fluoroaluminate, cesium fluoroaluminate, potassium fluorozincate and cesium fluorozincate into contact with the components to be brazed,brazing the components;recovering the excess aqueous flux preparation,adding flux or water as needed to adjust the recovered aqueous preparation to a predetermined concentration, andrecirculating the adjusted excess preparation, whereby flux-containing waste water is produced,further comprising separating the waste water from the flux and other solid constituents,supplementing the separated waste water with fresh water to form regenerated process water, andrecycling the regenerated process water to the brazing process.