Abstract

2+ ions, having a pH of 6.5-8.5, in a presence of oxygen, at a temperature of 100° C.-160° C. and a pressure of 150 kPa-800 kPa, so as to obtain an extraction solution comprising leached metals and solid leaching residue; (b) separating the solid leaching residue from the extraction solution; and/or (c) subjecting the extraction solution to at least one cementation so as to recover the leached metals in elemental state. The pH may be greater than or equal to 6.5 and less than or equal to 8.5. Temperature may be greater than or equal to 100° C. and less than or equal to 160° C. Pressure may be greater than or equal to 150 kPa and less than or equal to 800 kPa.

IPC Classes  ?

• C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
• C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
• C22B 15/00 - Obtaining copper
• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
• C25C 1/00 - Electrolytic production, recovery or refining of metals by electrolysis of solutions
• C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes

Abstract

A method of recovering metal values from metal-bearing materials such as slags and drosses includes the steps of pulverizing the material to particles less than about 100 μm; leaching the pulverized material with a solution of ammonium chloride, sodium chloride, and potassium chloride; sequentially recovering at least two metals from the leachate by the addition of zinc using a sequential cementation process; and recovering zinc from the solution by electrowinning.

IPC Classes  ?

• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
• C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
• C21B 15/00 - Other processes for the manufacture of iron from iron compounds
• C22B 19/20 - Obtaining zinc otherwise than by distilling
• C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
• C25C 1/16 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
• C22B 7/04 - Working-up slag

Abstract

A process for recovering non-ferrous metals from a solid matrix may include: leaching the solid matrix with an aqueous-based solution, in a presence of oxygen, to obtain an extraction solution including leached metals and solid leaching residue; separating the solid leaching residue from the extraction solution; and subjecting the extraction solution to at least one cementation to recover the leached metals in elemental state. The leaching solution may include chloride ions. The leaching solution may further include ammonium ions. A pH of the leaching solution may be greater than or equal to 6.5 and less than or equal to 8.5. A leaching temperature may be greater than or equal to 100° C. and less than or equal to 160° C. A leaching pressure may be greater than or equal to 150 kPa and less than or equal to 800 kPa.

IPC Classes  ?

• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
• C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 11/00 - Obtaining noble metals
• C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
• C22B 13/00 - Obtaining lead
• C22B 15/00 - Obtaining copper
• C22B 23/00 - Obtaining nickel or cobalt
• C22B 19/20 - Obtaining zinc otherwise than by distilling
• C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
• C25C 1/00 - Electrolytic production, recovery or refining of metals by electrolysis of solutions

Abstract

A method of recovering metals from a polymetallic mineral resource containing lead, zinc, and other metals, the method comprising flotation separating the polymetallic mineral resource while only suppressing the flotation of zinc and other metals to the extent that it does not substantially impair the flotation of lead to form a lead containing composite concentrate and an zinc-containing tailing; subjecting the composite concentrate to a lead recovery process in which an aqueous solution of ferric fluoroborate in fluoroboric acid leaches lead from the lead concentrate, and the lead is recovered from the solution by electrowinning; and further processing the leached concentrate to recover at least one additional metal.

IPC Classes  ?

• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes

Abstract

A method of recovering metal values from slag includes the steps of pulverizing the slag to particles less than about 100 μιη; leaching the pulverized slag with a solution of ammonium chloride, sodium chloride, and potassium chloride; sequentially recovering at least two metals from the leachate by the addition of zinc using a sequential cementation process; and recovering zinc from the solution by electrowinning.

IPC Classes  ?

• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
• C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
• C22B 7/04 - Working-up slag

Abstract

A system for recovering lead from lead-bearing materials by circulating an aqueous solution of ferric fluoroborate in fluoroboric acid through a leaching vessel to leach lead from the lead-bearing material and an electrolytic cell for recovering the lead includes a cooler for cooling at least a portion of the circulating solution sufficiently to precipitate alkali salts and alkali-earth salts, and a filter for removing the precipitated salts from the solution. A process for recovering lead from lead-bearing materials by leaching the lead from the lead-bearing material with a solution of ferric fluoroborate in fluoroboric acid and recovering the lead from the solution includes cooling at least a portion of the circulating solution sufficiently to precipitate alkali salts and alkali-earth salts, and filtering the salts from the solution.

IPC Classes  ?

• C25C 1/18 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of lead
• C25C 7/06 - Operating or servicing

Abstract

The present invention relates to a process for recovering non-ferrous metals from a solid matrix comprising the following phases: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions and ammonium ions and having a pH within the range of 6.5-8.5, in the presence of oxygen, at a temperature ranging from 100 °C to 160 °C and a pressure within the range of 150 kPa - 800 kPa, so as to obtain an extraction solution comprising the leached metals and a solid leaching residue; (b) separating said solid leaching residue from said extraction solution; (c) subjecting said extraction solution to at least one cementation so as to recover the metals in the elemental state.

IPC Classes  ?

• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
• C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof

Abstract

The present invention relates to a process for recovering non-ferrous metals from a solid matrix comprising the following phases: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions and ammonium ions and having a pH within the range of 6.5-8.5, in the presence of oxygen, at a temperature ranging from 100 °C to 160 °C and a pressure within the range of 150 kPa - 800 kPa, so as to obtain an extraction solution comprising the leached metals and a solid leaching residue; (b) separating said solid leaching residue from said extraction solution; (c) subjecting said extraction solution to at least one cementation so as to recover the metals in the elemental state.

IPC Classes  ?

• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
• C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts