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4585561 Flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions
New
metal containing excessive carbon, where the shapes act as a coolant and the iron oxide in the mill scale reacts with some of the carbon. The oily mill scale is neither deoiled nor ground more finely prior to introduction into the molten metal, and all processing of the mill scale is conducted under ambient conditions of temperature, pressure and atmosphere. The agglomerated shapes may be aged prior to introduction into the molten metal.
4585477 METHOD FOR SEPARATING AND RECOVERING NICKEL AND COPPER FROM COMPLEX MATERIALS Thomas K Mioen, Stockholm, to Boliden Aktiebolag
Sweden assigned
A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for example with sulphuric acid, sulphur trioxide, metal sulphate and/or sulphur dioxide together with oxygen; and a subsequent leaching of the sulphated material and recovery of copper from the leaching solution, for example by electrolysis. All or part of the leaching solution with its nickel content is recycled to the roasting stage, and the nickel content is removed in the form of nickel oxide together with the leaching residue, from which nickel can be recovered.
4585561
Patents
371
a surface active agent accelerates the process, The desilverized effluent has a silver content of less than 1 mg of Ag/l. The quantity of flotate (12) is less than 2% of the quantity of effluent (5) put into the process.
4587109 PROCESS FOR THE SEPARATE RECOVERY OF MOLYBDENUM AND VANADIUM Georges Lyaudet, Jean Vial, Limoges, France assigned to Compagnie Generate des Matieres Nucleaires (COGEMA) The invention relates to a process for recovering and purifying the molybdenum from a solution containing more molybdenum than vanadium. The process of the invention comprises the step of contacting the solution which contains molybdenum and vanadium, originally at a pH at least equal to 11 with an excess of an ammonium salt sufficient to precipitate the greatest part of vanadium in the form of solid ammonium vanadate, this excess being yet hot higher than a value such that after precipitation of vanadium, the quantity of ammonium having not reacted with the vanadate would be over a concentration which would account for risks of precipitating also molybdenum which is contained in the liquid phase of the supernatant. The molybdenum which is obtained is of industrial grade.
4587110
FLOTATION PROCESS FOR THE CONTINUOUS RECOVERY OF SILVER OR SILVER COMPOUNDS FROM SOLUTIONS OR DISPERSIONS
PROCESS OF RECOVERING COPPER AND OF OPTIONALLY RECOVERING SILVER AND GOLD BY A LEACHING OF OXIDE- AND SULFIDECONTAINING MATERIALS WITH WATER-SOLUBLE CYANIDES
Mark Zlokarnik, Geor Schindler, Gunthe Koepke, Werner Stracke, Cologne, Federal Republic Of Germany assigned to Agfa-Gevaert Aktiengesellschaft
George Potter, Arthu Bergmann, Ulrich Haidlen assigned to MNR Reprossesing Inc
A flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions is described, wherein finely divided, inert gas bubbles are injected into the dispersions of silver and silver compounds in the presence of protein and the pH of the medium is maintained at the isoelectric point of the protein. Addition of
A process is described by which copper and optionally silver and gold are recovered from sulfide and oxide ores, concentrates or slag, which contain the metals. The particulate materials are treated with an aqueous solution of an alkali cyanide or alkaline earth cyanide, the laden solution is filtered, if desired, a water-soluble sulfide compound is added to the laden solution or fil-
metal containing excessive carbon, where the shapes act as a coolant and the iron oxide in the mill scale reacts with some of the carbon. The oily mill scale is neither deoiled nor ground more finely prior to introduction into the molten metal, and all processing of the mill scale is conducted under ambient conditions of temperature, pressure and atmosphere. The agglomerated shapes may be aged prior to introduction into the molten metal.
4585477 METHOD FOR SEPARATING AND RECOVERING NICKEL AND COPPER FROM COMPLEX MATERIALS Thomas K Mioen, Stockholm, to Boliden Aktiebolag
Sweden assigned
A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for example with sulphuric acid, sulphur trioxide, metal sulphate and/or sulphur dioxide together with oxygen; and a subsequent leaching of the sulphated material and recovery of copper from the leaching solution, for example by electrolysis. All or part of the leaching solution with its nickel content is recycled to the roasting stage, and the nickel content is removed in the form of nickel oxide together with the leaching residue, from which nickel can be recovered.
4585561
Patents
371
a surface active agent accelerates the process, The desilverized effluent has a silver content of less than 1 mg of Ag/l. The quantity of flotate (12) is less than 2% of the quantity of effluent (5) put into the process.
4587109 PROCESS FOR THE SEPARATE RECOVERY OF MOLYBDENUM AND VANADIUM Georges Lyaudet, Jean Vial, Limoges, France assigned to Compagnie Generate des Matieres Nucleaires (COGEMA) The invention relates to a process for recovering and purifying the molybdenum from a solution containing more molybdenum than vanadium. The process of the invention comprises the step of contacting the solution which contains molybdenum and vanadium, originally at a pH at least equal to 11 with an excess of an ammonium salt sufficient to precipitate the greatest part of vanadium in the form of solid ammonium vanadate, this excess being yet hot higher than a value such that after precipitation of vanadium, the quantity of ammonium having not reacted with the vanadate would be over a concentration which would account for risks of precipitating also molybdenum which is contained in the liquid phase of the supernatant. The molybdenum which is obtained is of industrial grade.
4587110
FLOTATION PROCESS FOR THE CONTINUOUS RECOVERY OF SILVER OR SILVER COMPOUNDS FROM SOLUTIONS OR DISPERSIONS
PROCESS OF RECOVERING COPPER AND OF OPTIONALLY RECOVERING SILVER AND GOLD BY A LEACHING OF OXIDE- AND SULFIDECONTAINING MATERIALS WITH WATER-SOLUBLE CYANIDES
Mark Zlokarnik, Geor Schindler, Gunthe Koepke, Werner Stracke, Cologne, Federal Republic Of Germany assigned to Agfa-Gevaert Aktiengesellschaft
George Potter, Arthu Bergmann, Ulrich Haidlen assigned to MNR Reprossesing Inc
A flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions is described, wherein finely divided, inert gas bubbles are injected into the dispersions of silver and silver compounds in the presence of protein and the pH of the medium is maintained at the isoelectric point of the protein. Addition of
A process is described by which copper and optionally silver and gold are recovered from sulfide and oxide ores, concentrates or slag, which contain the metals. The particulate materials are treated with an aqueous solution of an alkali cyanide or alkaline earth cyanide, the laden solution is filtered, if desired, a water-soluble sulfide compound is added to the laden solution or fil-