A method of improving leach kinetics and recovery during atmospheric or above-atmospheric leaching of a metal sulfide is disclosed. A system for practicing the aforementioned method is also disclosed. Apparatus for practicing the aforementioned method is also disclosed. A new composition of matter which is formed by the aforementioned method, and which may be utilized in the system and apparatus is further disclosed. The new composition of matter may exhibit improved leach kinetics, and may have some utility in the semi-conductor arts, including uses within photovoltaic materials.

A method of improving leach kinetics and recovery during atmospheric or above-atmospheric leaching of a metal sulfide is disclosed. A system for practicing the aforementioned method is also disclosed. Apparatus for practicing the aforementioned method is also disclosed. A new composition of matter which is formed by the aforementioned method, and which may be utilized in the system and apparatus is further disclosed. The new composition of matter may exhibit improved leach kinetics, and may have some utility in the semi-conductor arts, including uses within photovoltaic materials.

A method of improving metal leach kinetics and recovery during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the step of processing a metal sulfide concentrate in a reductive activation circuit 220 that operates at a first redox potential, to produce a reductively-activated metal sulfide concentrate. The method may further comprise the step of subsequently processing the activated metal sulfide concentrate in an oxidative leach circuit 240 to extract metal values. In some disclosed embodiments, reductive activation steps and/or oxidative dissolution steps may employ mechano-chemical and/or physico-chemical processing of particles or agglomerates thereof. Reductive activation may be made prior to heap leaching or bio-leaching operations to improve metal extraction. Systems for practicing the aforementioned methods are also disclosed.

A method for extracting copper values from a low grade copper ore feedstock is provided. The method includes (a) providing an ore feedstock of a copper oxide ore; (b) subjecting the ore to at least one process selected from the group consisting of primary crushing processes and secondary crushing processes; (c) subjecting the ore feedstock to high pressure grinding roll crushing, thereby obtaining a crushed ore; (d) subjecting the crushed ore to acid curing, thereby obtaining a cured ore; (e) subjecting the cured ore to vat or heap leaching, thus yielding a leachate; (f) passing the leachate through a first ion exchange resin which is selective to base metals plus copper, thereby removing a portion of the copper values from the leachate and yielding a first loaded resin and a first treated leachate; (g) stripping base metals plus copper values from the first loaded resin with a first stripping solution, thereby yielding a base metals plus copper-loaded stripping solution; (h) selectively extracting copper values from the copper-loaded stripping solution via solvent extraction, thereby obtaining an extract and a raffinate; and (i) crystallizing a copper salt from the extract, thereby obtaining a crystallized copper salt.

The present invention provides a method for treating a copper-containing waste etching solution, which includes: preparing basic copper chloride nanometer seed crystals and synthesizing basic copper chloride mono-crystals; making an acidic waste etching solution subjected to agglomeration reaction with an ammonium-containing solution and slurry containing the basic copper chloride mono-crystals to obtain basic copper chloride crystal particles and copper-removed waste solution; making an alkaline waste etching solution react with sulfuric acid to obtain a copper sulfate mixed solution; and then evaporating, concentrating, cooling and crystallizing the copper sulfate mixed solution obtained by the reaction of the alkaline waste etching solution and the sulfuric acid in sequence to obtain copper sulfate pentahydrate solids. In a case of low investment, the present invention not only can realize the recycling of copper in the copper-containing waste etching solution, but also can obtain various high-value products, and can achieve both environmental and economic benefits.

The present invention provides a method for treating a copper-containing waste etching solution, which includes: preparing basic copper chloride nanometer seed crystals and synthesizing basic copper chloride mono-crystals; making an acidic waste etching solution subjected to agglomeration reaction with an ammonium-containing solution and slurry containing the basic copper chloride mono-crystals to obtain basic copper chloride crystal particles and copper-removed waste solution; making an alkaline waste etching solution react with sulfuric acid to obtain a copper sulfate mixed solution; and then evaporating, concentrating, cooling and crystallizing the copper sulfate mixed solution obtained by the reaction of the alkaline waste etching solution and the sulfuric acid in sequence to obtain copper sulfate pentahydrate solids. In a case of low investment, the present invention not only can realize the recycling of copper in the copper-containing waste etching solution, but also can obtain various high-value products, and can achieve both environmental and economic benefits.

In accordance with, the present invention, there is provided an antimicrobial composition comprising an aqueous solution containing copper and/or zinc ions, optionally a hydroxide salt, and phosphorous acid. The composition, is additionally sporicidal and scleroticidal when combined with a salt of nitrous acid such as sodium nitrite. The present invention may also include chemicals containing the phosphite or phosphonaie group (PO/l which can inhibit the formation of scierotia at concentrations that are readily achievable for agricultural applications. Compositions of the present invention, inhibit, scierotia formation by fungi and may therefore be used in the field to prevent the continuation and advancement of pathogenie fungi.

In accordance with, the present invention, there is provided an antimicrobial composition comprising an aqueous solution containing copper and/or zinc ions, optionally a hydroxide salt, and phosphorous acid. The composition, is additionally sporicidal and scleroticidal when combined with a salt of nitrous acid such as sodium nitrite. The present invention may also include chemicals containing the phosphite or phosphonaie group (PO/l which can inhibit the formation of scierotia at concentrations that are readily achievable for agricultural applications. Compositions of the present invention, inhibit, scierotia formation by fungi and may therefore be used in the field to prevent the continuation and advancement of pathogenie fungi.

A high-performance, energy-saving, automatic cooper-melting apparatus, includes peripherals containing a tank acting as a main body. The tank has a top capped by an upper stirring device that has a top equipped with a lid. The lid has a lower surface with a sealing pad attached thereto. The sealing pad is centrally installed with a stirring motor. The stirring motor is centrally installed with a post. The post is equipped peripherally with stirring rollers. The tank contains a probe connected to an electric cord whose two ends are connected to an air suspension blower and a DCS detecting device, respectively. The tank contains a screen plate. The tank has one lateral provided with an air pipe and an opposite lateral provided with a liquid pipe. The air pipe has one end fixed with an air pipe stirrer, and the liquid pipe has one end fixed with a liquid pipe stirrer.

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.