Processing waste materials to recover valuable metals, such as copper, from the materials. Waste materials are further refined to concentrate the metallic material after the waste materials are initially processed. Processes include employing air separation and screening. Processes also include employing a dynamic sensor and a vacuum pressure separator to separate metals from other materials. A central processing facility may process metal concentrate from multiple concentration facilities.

The present invention disclosed use of lactam as a solvent in the preparation of nanomaterials by precipitation method, sol-gel method or high temperature pyrolysis. These methods are able to recycle lactam solvent, which meet requirements of environmental protection.

Provided is a preparation method of copper nanostructures, characterized in that a copper precursor including halide is reacted with polyethyleneimine (PEI) and a reducing agent in an aqueous solution. According to this method, the copper nanostructures may be easily prepared in a sphere, wire, or plate form, and high-quality copper nanostructures may be produced with a high production yield of 90% or more. This method is also appropriate for large-scale production.

The present invention relates to a chemical and physical hydrometallurgical method with solid-liquid-solid interaction for the solubilization of copper sulphides, by Selective Transformation and Precipitation of soluble, chlorinated, copper species, where said method does not depend on the redox potential and can be carried out in a wide range of pH under conditions of salts supersaturation, which is a condition that is generated by periods of non-irrigation, from ores or copper concentrates, mainly primary sulphides, such as chalcopyrite comprising said copper. This method is composed of 3 steps, called “Moistening and Solvation Step”, “Selective Transformation and Precipitation Step” and “Acid-Chlorinated Washing step”, wherein said method does neither require the addition of oxidizing or reducing agents, nor oxygen. Furthermore, the steps of the method can be applied only with the presence of water, where acid addition is not required. On the other hand, the repetitions of the steps of the method potentiate the physical effects on the ore or concentrate through the phenomena of haloclasty and crystallization of salts. The invention can also be applied to sulphide base metals such as nickel, zinc, cobalt, lead, molybdenum, among others, independently of the usual impurities of the sulphide ores, as occurs with the presence of arsenic.

This invention relates to a process for recovering value metals from sulphide ore, including steps of crushing ore in a primary crusher (14) to a size of about 40 cm and less, passing the crushed ore through one or more of the following pre-beneficiation processes such as bulk sorting (16) and screening (20) followed by coarse floatation (46/50), or gravity separation or magnetic separation. A waste stream (54) from the pre-beneficiation process/es with a particle size greater than 100 μm is stacked in a heap (26) and subjected to a heap leach. This integrated process utilises the pre-beneficiation techniques best suited to the characteristics of a particular orebody; and during the pre-beneficiation simultaneously creating a low grade stream that yields significantly higher recoveries than achievable by normal heap leaching of low grade run of mine ore.

A method of pretreatment and bromine recovery of PCB Incineration ash is disclosed that relates to the field of comprehensive recovery of valuable metals by full wet method, especially relates to a method of valuable metals and bromine recovery, precious metals enrichment in pretreatment process of PCB Incineration ash. The major steps includes alkali leaching, Cu extraction back-extraction, neutralization-precipitation to separate, Bromine evaporative crystallization, regeneration, acid pickling, Zn evaporative crystallization, removal of Zn and Cu. Compared with the traditional comprehensive recovery process of ash, the invention can separate bromine from ash and recover valuable metals such as copper, zinc and lead with the maximum extent, at the same time, the enrichment of silver and other precious metals is beneficial to the subsequent recovery of precious metals. It has high added recovery value and no tailless discharge.

Disclosed are reagent compositions for metal solvent extraction and methods of preparation and use thereof. In certain embodiments, the disclosure relates to recovering metal values from an aqueous process stream using solvent extraction and employing a mixture of oxime reagents that synergistically improves metal recovery, rate of degradation and/or metal selectivity.

Disclosed are reagent compositions for metal solvent extraction and methods of preparation and use thereof. In certain embodiments, the disclosure relates to recovering metal values from an aqueous process stream using solvent extraction and employing a mixture of oxime reagents that synergistically improves metal recovery, rate of degradation and/or metal selectivity.

Provided herein is a system for producing suspensions comprising soluble metal ions. The system comprises a basket to hold a metal load comprising a permeable floor so as to allow a solution to come into contact with the metal load. The system further comprises a vessel within which the solution and the basket may be maintained while metal ions are leached from the metal load into the solution. Some embodiments of the present disclosure pertain to a system used to produce a suspension comprising copper ions. Additionally, provided herein are methods of using the system to produce suspensions comprising soluble metal ions. Some embodiments of the present disclosure pertain to methods of making suspensions comprising copper ions. The resultant suspensions comprising metal ions may be further modified to supply a pharmaceutically acceptable treatment.

The invention relates to a method for multi-metal products recovery from pyrolytic waste integrated circuit boards. The method mainly comprises the steps of smelting and blending, atomization, acidolysis and filtration, noble metal recycling, copper extraction and back extraction, nickel extraction and back extraction. Compared with the prior art, the method has the advantages that smoke pollution and the smelting slag treatment in the process of preparing a black copper ingot through multi-metal collaborative smelting are reduced, and the problems of low anode efficiency of the black copper electrolysis process are solved. Meanwhile, the high-temperature high-oxygen atomized gas generated in the atomizing process provides a heat source and an oxygen source for subsequent acidolysis, so that the energy consumption is further reduced. The method has the advantages such as short process, remarkable energy conservation and emission reduction.