Providing a method of recovering Cu from copper ore containing Hg. A method for recovering Cu from copper ore, the method comprising: (A) providing copper ore containing Hg with an amount of 0.2 ppm or more; (B) treating the copper ore to leach Cu and Hg with use of solution containing iodide ions and Fe (3+); and (C) treating post-leaching solution with activated carbon to absorb the iodide ions and Hg.

The presently disclosed subject matter is directed to a method of hydrothermally treating metallic packaging, metallic labeling material, and scrap metal items. Particularly, the disclosed method initially comprises providing a metallic starting material. The metallic starting material is introduced to a reactor and processed at elevated temperature and/or pressure for a desired amount of time. As a result, the metallic portion of the starting material separates into a distinct layer that can be removed from the remainder of the starting material.

The present invention relates to a method for treating lithium ion battery scrap containing Li, Ni, Co, Mn, Al, Cu and Fe, the method comprising carrying out a calcination step, a crushing step and a sieving step in this order, and after the steps, the method comprising: a leaching step of leaching the lithium ion battery scrap by adding it to an acidic solution to leave at least a part of Cu as a solid; a Fe/Al removal step comprising allowing a leached solution obtained in the leaching step to pass through a Fe removal process for separating and removing Fe by addition of an oxidizing agent and an Al removal process for separating and removing a part of Al by neutralization in any order; an Al/Mn extraction step of extracting and removing a residue of Al and Mn from a separated solution obtained in the Fe/Al removal step by solvent extraction; a Co recovery step of extracting and back-extracting Co from a first extracted solution obtained in the Al/Mn extraction step by solvent extraction and recovering the Co by electrolytic winning; a Ni recovery step of extracting and back-extracting, by solvent extraction, a part of Ni from a second extracted solution obtained by the solvent extraction in the Co recovery step and recovering the Ni by electrolytic winning; a Li concentration step of extracting and back-extracting, by solvent extraction, a residue of Ni and Li from a third extracted solution obtained by the solvent extraction in the Ni recovery step and repeating the operations of the extracting and the back-extracting to concentrate Li; and a Li recovery step of carbonating Li in a Li concentrated solution obtained in the Li concentration step to recover the Li as lithium carbonate.

A process to significantly improve the copper chemical leaching process for primary and secondary minerals, using calcium chloride including the agglomeration, curing, and leaching with a high content of chloride, iron and copper stages. The mineral is then washed with a low concentration of copper and a high concentration of acid, where the impregnated copper is extracted from the pit and wherein a recirculated solution is used in the agglomeration stage.

A system and method for recycling metals from industrial waste using an electrodepositing technique. The method includes the steps of collecting the industrial waste, transporting, processing and digesting the waste in a solvent or acidic solution and then electrodepositing out the desired metals. Other processing steps may be used to prepare the industrial waste for electrodeposition and the process may be repeated on the digest solution, to obtain multiple metals.

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.

Methods for recovering a metal value from a metal-bearing material are provided. The method comprises agglomerating the metal-bearing material with an agglomeration solution comprising a raffinate, an oxidant, and citric acid or salts thereof to form an agglomerated metal-bearing material; leaching the agglomerated metal-bearing material with a leaching solution comprising the raffinate and the citric acid or salts thereof to produce a pregnant leaching solution and a leached material; re-oxidizing the leached material with a curing solution comprising the raffinate and the oxidant; and recovering the metal value from the pregnant leach solution to produce the raffinate.

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.

A hydrometallurgical method 80 for the removal at least one of iron, aluminum, arsenic, sulfur, nickel, cobalt, zinc and cadmium (impurities) from a copper concentrate to produce an upgraded copper concentrate 92, the method comprising the step of: subjecting the copper concentrate to an acidic leaching process (NONOX leach 120) in a multi-compartment autoclave using a copper sulfate containing lixiviant under lowered electrochemical conditions, to implement a controlled removal of between 20% and 99% of at least one of the impurities to produce the upgraded copper concentrate. The NONOX leach 120 is conducted to produce the majority of required soluble copper sulfate from a partial oxidation of the feed copper concentrate in a first compartment 200 of the multi-compartment autoclave under particular conditions.

A method for recycling copper indium gallium selenium materials comprises the steps of leaching by using sulfuric acid and hydrogen peroxide, reduction of selenium by using sulfur dioxide, separation of copper by using hydrolysis, alkali separation of indium and gallium, replacement of indium, hydrolysis of gallium, and the like. Leaching is carried out by using sulfuric acid in cooperation with hydrogen peroxide, so that the leaching rate is greatly improved, and acid gas pollution is reduced; PH differential copper is separated by using metal ion hydrolysis, so that costs are low; and in addition, alkali separation of gallium is carried out, separation between indium and gallium can be implemented by merely adjusting the PH of a solution, the separation effect is good, the purities of obtained indium and gallium products are high.