Abstract: A flotation separator apparatus can include a tank for receiving an incoming feed stream comprising plastic material and metal material liberated from battery materials. A separator liquid can be within the tank and at least a first submersion agitator may be located downstream from an inlet and may have at least a first engagement member that is movable and configured to urge the engaged metal and plastic materials downwardly to submerge them in the separator liquid thereby dislodging at least a first portion of metal material from the plastic material and allowing the dislodged first portion of the metal material to precipitate toward the lower end of the tank.

Abstract: A method of precipitating copper sulphide from an incoming feed stream comprising copper liberated from within battery materials can includes the steps of: a) receiving an incoming feed stream comprising copper entrained in a carrier liquid in a precipitation apparatus; b) introducing a sulphide reductant to the feed stream to precipitate copper sulphide solids out of the feed stream during a precipitation residence time that is less than 24 hours to produce a copper sulphide slurry; and processing the copper sulphide slurry to separate the precipitated copper sulphide solids and provide a copper-depleted stream.