PROCEDE DE RECYCLAGE DES EAUX ISSUES D'UN PROCEDE DE FABRICATION D'UN MATELAS ISOLANT DE FIBRES MINERALES

The invention relates to a method of controlling the level of corrosivity of an aqueous solution recovered during a process for producing a blanket of mineral fibers, comprising in particular the fiberizing and the coating of said fibers with a binder comprising a polyacid typically of the acrylic type, said aqueous solution being at least partly recycled into a zone in which said resin is prepared and/or a scrubbing zone of the production plant, said method being characterized in that the pH of the solution in the recycling circuit is maintained between minimum and maximum values by injecting into said circuit an agent for modifying said pH, such as a base, the quantity injected or the flow rate of the pH-modifying agent being adjusted directly according to the quantity or the flow rate of acid binder injected during the fiberizing process. The invention also relates to the device for implementing the method.