RECOVERY OF SILVER

专利名称：RECOVERY OF SILVER发明人：JAMES SIDNEY BENTLEY申请号：AU6986874申请日：19740606公开号：AU6986874A公开日：19751211

摘要：1462868 Electro-recovering silver PHOTOGRAPHIC SILVER RECOVERY Ltd 17June 1974 [27 June 1973] 30650/73 Addition to 1285602 Heading C7B An apparatus forrecovering Ag from used bleach-fix photographic solution comprises an electrolyticrecovery or plating cell 11 preceded by a buffer or store tank 12 receiving the usedsolution and from which the solution is pumped to the cell intermittently by meteringpump 13, switch means operated according to the solution level in the buffer tank, e.g.top and bottom level switches A and D, to control the pump and switching on or off ofplating current of the cell, and means for automatically separating the cathode assemblyand the solution from one another when the plating current is switched off; e.g. eitherlifting means also controlled by the switch means for automatically lifting the cathodeassembly out of the solution in the cell, or a pump 14 started by the switch means forpumping solution out of the cell automatically, when the plating current is switched off.The apparatus may also include a pump 15 for filling the cell with solution from the tank;the top level switch A of the tank start pumps 13, 15 for filling the cell and switches onthe plating current, the top level switch B of the cell switches off the pump 15, thebottom level switch D of the tank switches off the pump 13 and plating current andswitches on the pump 14 for emptying the cell, and the bottom level switch E of the cell

switches off the pump 14. The cathode assembly preferably comprises a series offrustoconical discs 18 spaced e.g. by spacers 20 along a vertical shaft 19, each disc havingdrain hole 21 near the centre.

申请人：PHOTOGRAPHIC SILVER RECOVERY LTD.

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