Processes for producing copper granules on a surface of a reducing metal. The process can include contacting the reducing metal with an aqueous solution comprising a copper(II) salt and a halide. The molar ratio of the halide to the copper(II) in the copper (II) salt can be at least about 3:1. The granular copper can be produced on a surface of the reducing metal, and is optionally removed from the surface of the reducing metal by shaking, washing, and/or brushing, and/or optionally with stirring and/or circulating of the aqeuous solution.

Provided is a method for treating an alloy by which nickel and/or cobalt can be selectively isolated from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium ion battery. The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper as well as nickel and/or cobalt, the method including: a leaching step in which a leachate is obtained by subjecting an alloy to an acid-based leaching treatment under conditions in which a sulfurizing agent is also present; a reduction step in which a reduced solution is obtained by subjecting the leachate to a reduction treatment using a reducing agent; and an oxidation/neutralization step in which a solution that contains nickel and/or cobalt is obtained by adding an oxidizing agent and also a neutralizing agent to the reduced solution.

A method for recovering gold from electronic components includes a first macro-step of dissolving gold and copper from the electronic components using an aqueous solution comprising HNO.sub.3 concentrated in a percentage varying from 28% to 38% and concentrated HCl in a percentage varying from 15% to 25%. A second macro-step includes adding KOH to the obtained solution to bring it to a pH between 0.5 and 0.9. A third macro-step includes adding to the solution obtained in the second macro-step an amount of ascorbic acid dissolved in water equal to the amount of gold hypothetically present in a sample of the first macro-step, multiplied by a factor ranging between 1.5 and 3, causing precipitation of gold, which is separated from the solution and made available in powder form in a fourth macro-step.

Processes for producing copper granules on a surface of a reducing metal. The process can include contacting the reducing metal with an aqueous solution comprising a copper(II) salt and a halide. The molar ratio of the halide to the copper(II) in the copper (II) salt can be at least about 3:1. The granular copper can be produced on a surface of the reducing metal, and is optionally removed from the surface of the reducing metal by shaking, washing, and/or brushing, and/or optionally with stirring and/or circulating of the aqueous solution.

Disclosed are a method for removing elemental copper from ternary battery waste and its application. The method comprises the following steps: crushing and screening the ternary battery waste to obtain a powder, and then removing iron by magnetic separation to obtain an iron-removed ternary waste; Adding an alkaline solution to the iron-removed ternary waste to perform an aluminum removal reaction, filtering to obtain a filter slag and aluminum-containing wastewater, washing the filter slag with water and drying to obtain a copper-nickel-cobalt-manganese material. Adding an iron salt solution to the copper-nickel-containing material to perform a leaching process, filtering to obtain a leachate and a nickel-cobalt-manganese waste; adding iron powder to the leachate and stirring to perform a reaction, filtering to obtain a copper residue, washing the copper residue with water and drying to obtain a copper-removed liquid and a sponge copper.

The invention relates to the field of comprehensive recovery of valuable elements such as bromine, base metal and precious metal from incineration ash, especially relates to a method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process. The process mainly comprises pretreatment of the printed circuit board Incineration ash and circulation-chlorination enrichment process for precious metals. The crude copper, crude zinc sulfate, bromine, lead chloride and precious metal enriched slag are obtained. Compared with the traditional process, it realizes the cycle enrichment of precious metals as well as avoids the loss of valuable metals and secondary pollution caused by tail liquid discharge.

The present invention discloses a method for preparing iron ore concentrates by recycling copper smelting slag tailings, and belongs to the technical field of metallurgy and tailings recycling. In the present invention, copper slag tailings obtained after copper pyrometallurgy and flotation and water are used as raw materials, and low-concentration sulfur dioxide flue gas is used as a leaching agent for leaching of metals such as iron, zinc, copper, arsenic, and silicon in the slag tailings; the leachate is purified step by step through processes such as replacement by metal iron powder and sulfide precipitation control, to separate zinc, copper, arsenic, etc.; a purified solution is mainly composed of FeSO.sub.4 or can be used for producing a ferric salt flocculant; obtained tailings are used to obtain iron ore concentrates through magnetic separation, and the obtained iron ore concentrates can be used for further producing ultra-pure iron ore concentrates.

The invention relates to the field of comprehensive recovery of valuable elements such as bromine, base metal and precious metal from incineration ash, especially relates to a method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process. The process mainly comprises pretreatment of the printed circuit board Incineration ash and circulation-chlorination enrichment process for precious metals. The crude copper, crude zinc sulfate, bromine, lead chloride and precious metal enriched slag are obtained. Compared with the traditional process, it realizes the cycle enrichment of precious metals as well as avoids the loss of valuable metals and secondary pollution caused by tail liquid discharge.

The invention relates to a method of removing and/or recovering metals from a dilute metal containing solution. In particular, the invention concerns a method for recovering copper from a dilute copper-iron bearing mining water, particularly from a copper-iron bearing mining wastewater.

The invention relates to a method of removing and/or recovering metals from a dilute metal containing solution. In particular, the invention concerns a method for recovering copper from a dilute copper-iron bearing mining water, particularly from a copper-iron bearing mining wastewater.