| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 075416000 | Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) | 23 |
| 20120279354 | METHOD FOR RECYCLING METALS FROM WASTE MOLYBDIC CATALYSTS - A method for recycling metals from waste molybdic catalysts, comprises steps of leaching, by soaking a waste molybdic catalyst into a highly oxidized acid and conducting a reaction between sulfur in the waste molybdic catalyst and the acid to obtain sulfide and vaporizer, wherein metals in the waste molybdic catalyst are dissolved and oxidized by the acid to obtain a first solution and dregs; and refining, by further dissolving metals in the dregs into a second solution, and extracting metals in the waste molybdic catalyst from the first and second solution; wherein, the vaporizer obtained from the step of leaching is converted into highly oxidized acid and recycled in the step of leaching. | 11-08-2012 |
| 20120279355 | METHOD FOR RECYCLING METALS FROM WASTE TUNGSTEN CATALYSTS - A method for recycling metals from waste tungsten catalysts comprises steps of: leaching, by soaking a waste tungsten catalysts into a highly oxidized acid and conducting a reaction between sulfur of the waste tungsten catalysts and the acid to obtain sulfide and oxidized dianions, wherein metals in the waste tungsten catalysts are dissolved and oxidized by the acid to obtain a first solution and dregs; and refining, by extracting metals of the waste tungsten catalysts from the first solution; wherein, the oxidized dianions obtained from the step of leaching is converted into highly oxidized acid, which is capable of being recycled. | 11-08-2012 |
| 20120304825 | PROCESS FOR PRODUCING SPONGE TITANIUM - The present invention provides a process for producing sponge titanium, which includes the following steps: Step A: placing aluminum into a resistance furnace, vacuum pumping, introducing inert gas, heating to molten aluminum; Step B: opening a reactor cover, adding a proper amount of potassium fluotitanate to a reactor, leakage detecting after closing the reactor cover, slowly raising the temperature to 150° C., vacuum pumping, and continuously heating to 250° C.; Step C: introducing inert gas into the reactor, continuously raising the temperature to 750° C., stirring uniformly; Step D: opening a valve to adjust the stirring speed, adding molten aluminum drops, and controlling the reaction temperature to 750° C. to 850° C.; Step E: opening the reactor cover, removing a stirring device, eliminating the upper layer of KAlF | 12-06-2012 |
| 20140109724 | METHOD FOR PRODUCING FERROALLOY CONTAINING NICKEL - The invention relates to a method for producing a ferroalloy containing nickel. From a fine-grained raw material containing iron and chromium and a fine-grained raw material containing nickel, a mixture is formed with binding agent, the mixture is agglomerated so that first formed objects of desired size are obtained. The objects formed are heat treated in order to strengthen the objects so that the heat treated objects withstand conveyance and loading into a smelter furnace. Further, the objects are smelted under reducing circumstances in order to achieve ferrochromenickel, a ferroalloy of a desired composition containing at least iron, chromium and nickel. | 04-24-2014 |
| 20160160312 | Hydrometallurgical System and Process Using an Ion Transport Membrane - A hydrometallurgical system and process with a hydrometallurgical processing circuit integrated with an ion transport membrane assembly. The ion transport membrane assembly provide oxygen to the hydrometallurgical processing circuit. | 06-09-2016 |
| 20180023168 | METHOD FOR RECOVERING SCANDIUM | 01-25-2018 |
| 075419000 | Step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions after a step at 300 degrees C or greater | 12 |
| 20100242681 | Method for concentration of gold in copper sulfide minerals - Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue. According to the method, a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102° C. and 112° C. or lower to obtain a leach residue, and the leach residue is subjected to flotation to separate it into a float fraction and a sink fraction. The float fraction obtained by flotation is desulfurized by heating at a temperature of 250 to 800° C. under an inert atmosphere to obtain a desulfurized product. The desulfurized product is subjected to oxidative roasting by heating at a temperature of 600 to 800° C. under an atmosphere of flowing oxygen or air to obtain an oxidatively-roasted product. The oxidatively-roasted product is dissolved in a sulfuric acid solution to obtain a copper solution, and a gold-bearing residue is separated and recovered from the copper solution. | 09-30-2010 |
| 20110113926 | Method of reduction treatment of metal oxides or steelmaking waste and method of concentrating and recovering zinc and/or lead - A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing said material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction. | 05-19-2011 |
| 075420000 | Step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions is reduction to free metal | 10 |
| 20130025412 | METHOD FOR LEACHING ZINC FROM A ZINC ORE - A method for leaching zinc from a zinc-bearing carbonate ore, the method comprising the steps of: subjecting the zinc-bearing carbonate ore to elevated temperatures of between about 300° C. and about 900° C. thereby producing a roasted ore; subjecting the roasted ore to an aqueous acid or alkali leach thereby producing an aqueous zinc solution; and subjecting the aqueous zinc solution to a zinc recovery step. | 01-31-2013 |
| 20150292057 | Improved Method for Metal Production - The invention provides a method for the production of a metal, the method comprising the steps of mixing an oxide of the metal with a reducing agent comprising a Group II metal or a hydride thereof in the presence of water and/or an organic solvent, heating the mixture of oxide and reducing agent, leaching the resulting material with water; and washing the leached material with a dilute aqueous acid. Typically, the metal is a transition or rare earth metal, the oxide of the metal is an oxide of a transition or rare earth metal, and the reducing agent is selected from calcium or magnesium or the hydrides of calcium and magnesium. The metal is generally obtained at a purity of around 98.5-99.1%, and the method is much quicker than the methods of the prior art and has a much lower carbon footprint, thereby providing an option which is more sustainable, environmentally friendly, and accommodative for industries. Particularly good results are observed in the production of transition metals such as titanium, tantalum and niobium. | 10-15-2015 |
| 20150307955 | METHOD AND APPARATUS FOR ACID GRANULATION OF MATTE - A method is provided for leaching the metals while granulating molten matte, comprising the steps of feeding a molten matte as a falling stream into a granulation chamber, spraying a liquid jet on the stream of molten matte to atomize the matte, and cooling the matte particles thus formed. The liquid jet comprises an acid solution containing water and sulfuric acid so that the acid solution starts leaching metals from the molten matte when the liquid jet contacts the molten matte. Part of product solution from granulation can be circulated to liquid jets to increase the metal content in the solution and to reduce its acid con-tent. | 10-29-2015 |
| 075421000 | Noble metal | 4 |
| 075422000 | Silver(Ag) | 1 |
| 20160083817 | METHOD AND PLANT FOR PROCESSING ROASTED PYRITES - The invention relates to a method and a recovery system for obtaining raw materials from ores and/or ore tailings, in particular a method and a recovery system for recovering metals from ores and/or ore tailings, especially a method and a recovery system for recovering metals from pyrite tailings, preferably from roasted pyrites produced during sulphuric acid manufacture. | 03-24-2016 |
| 075423000 | Gold(Au) | 3 |
| 20120067170 | EXTRACTION OF GOLD FROM CATHODE ASSOCIATED GOLD CONCENTRATES - The invention involves a method for recovering gold from a gold concentrate comprising: dissolving gold from the concentrate in an aqueous liquor to provide a gold liquor; subjecting the gold liquor to electrolysis in an electrowinning cell to provide cathode-associated gold material; leaching the cathode associated gold material in an aqueous liquor under reducing conditions to provide a treated solid residue; and smelting the treated solid residue to recover gold. | 03-22-2012 |
| 20140298954 | EXTRACTION OF GOLD FROM FINE CARBON RESIDUE - Recovering gold from gold-loaded fine carbon by application of thermo-kinetic chemical activation regime at a low temperature, while preventing vitrification of imputies found in the gold-loaded fine carbon. | 10-09-2014 |
| 20160083816 | METHOD FOR RECOVERING GOLD FROM REFRACTORY ORE - A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery. | 03-24-2016 |
| 075424000 | Copper(Cu) | 2 |
| 20090241731 | SYSTEM AND METHOD FOR EXTRACTING BASE METAL VALUES FROM OXIDE ORES - A method for recovering base metal values from oxide ore is provided by the present disclosure. The ore includes a first metal selected from the group consisting at least one of iron and aluminum and a second metal selected from the group consisting of at least one of nickel, cobalt and copper. The method includes the steps of: contacting the oxide ore with hydrogen chloride gas to obtain chlorides of the first and second metals and subjecting at least the first and second metals to pyrohydrolysis at a predetermined temperature to decompose the chlorides of the first metal into oxides. The method also includes the step of mixing the oxides of the first metal and the chlorides of the second metal in an aqueous solution to dissolve the chlorides of the second metal and recovering the dissolved ions of the second metal from the aqueous solution. | 10-01-2009 |
| 20120266723 | Processing copper sulfide ores - Copper is chemically extracted from crude ores by first roasting it at temperature up to 500° C. for 90 minutes, then treating it with ammonium salt followed by leaching with sulfuric acid to obtain a soluble copper mass for further purification. | 10-25-2012 |
| 075425000 | Iron(Fe), Cobalt(Co), or Nickel(Ni) | 1 |
| 20100154593 | Production of Metallic Nickel with Low Iron Content - A process for producing a metallic nickel product with a low iron content, including the steps of: (i) providing an acidic product liquor containing at least nickel and iron; (ii) subjecting said acidic product liquor to an ion exchange process wherein an ion exchange resin selectively absorbs said nickel and part of the iron from said product liquor; (iii) eluting the nickel and iron from said resin with an acidic solution to produce an eluate containing said nickel and iron. (iv) neutralising said eluate to a pH value in the range from 2.5 to 3.5 to cause precipitation of a substantial amount of said iron, leaving an iron depleted eluate; (v) neutralising the iron depleted eluate to a pH value in the range from 7 to 8 to cause precipitation of nickel hydroxide containing low iron; (vi) calcining said nickel hydroxide to convert it to nickel oxide; (vii) subjecting said nickel oxide to direct smelting in the presence of a reductant to produced a molten nickel phase; and (viii) refining said molten nickel phase by oxidation to produce a metallic nickel product with low iron content. | 06-24-2010 |
| 075426000 | Noble metal obtained | 2 |
| 20110174111 | Method of mineral raw materials processing - The invention relates to methods of precious metals recovery from raw materials containing chlorides of earth metals, for example slimes. This method comprises the steps of cinder processing carried out in two steps. At the first step, a secondary enrichment by water washing is carried out with a ratio (S:L) ranging from 1:0.7 to 1:2.5. Then, at the second step, the washed cinder is leached by hydrochloric acid with a ratio (S:L) ranging from 1:2 to 1:3. | 07-21-2011 |
| 075427000 | Silver(Ag) | 1 |
| 20150344990 | HYDROMETALLURGICAL TREATMENT PROCESS FOR EXTRACTION OF METALS FROM CONCENTRATES - This invention relates to a hydrometallurgical process for extracting platinum group metals (PGMs), gold, silver and base metals from a flotation concentrate ( | 12-03-2015 |
| 075430000 | Iron(Fe), Cobalt(Co), or Nickel(Ni) obtained | 3 |
| 20100031777 | ORE TREATING METHOD, ORE TREATING APPARATUS, IRON MANUFACTURING METHOD, AND IRON AND STEEL MANUFACTURING METHOD - An ore containing crystal water (bond water) is heated to dehydrate the crystal water in the form of water vapor, thereby rendering the ore porous to generate a porous ore. Next, the porous ore is forced into contact with a dry-distilled gas (organic gas) obtained by dry-distillation of an organic substance such as wood and the like or an organic liquid such as tar and the like. An organic compound such as tar and the like contained in the dry-distilled gas or organic liquid adheres to the surface of the porous ore. Next, the porous ore adhered with an organic compound is heated at 500° C. or higher, to generate an ore in which a part of an oxide of an element such as iron and the like contained is reduced by carbon in the organic compound. | 02-11-2010 |
| 20100064854 | NICKEL-LATERITE PROCESS - An improved method for processing of nickel-bearing ores, laterite ores, saprolite and limonite ores, oxidic and sulfide ores, metallurgical wastes, and other metal-bearing materials, to recover the valuable minerals contained therein, comprising comminuting ore to a desired size; leaching the ore at about 70 C to 130 C for about 30 minutes to 4 hours with nitric acid, raising the temperature of the solution to form a liquid/solid residue in which nickel, cobalt and magnesium values are in solution, and iron, manganese, and aluminum are solid residues in oxide form; conducting a liquid-solid separation and removing the solids; and recovering the nickel, cobalt, and manganese from the liquid-metal concentrate. The leachate is recovered and the nitric acid from the leachate is recycled. | 03-18-2010 |
| 20120312125 | METHOD FOR IRON-MAKING WITH FULL OXYGEN AND HYDROGEN-RICH GAS AND EQUIPMENT THEREOF - A method of ironmaking using full-oxygen hydrogen-rich gas which includes hot transferring and hot charging the high-temperature coke, sinter and pellet into the ironmaking furnace through transferring and charging device, and injecting oxygen and hydrogen-rich combustible gas at a predetermined temperature into the ironmaking furnace through the oxygen tuyere and the gas tuyere disposed at the ironmaking furnace, respectively. It also provides an apparatus for ironmaking using full-oxygen hydrogen-rich gas which includes a raw material system, a furnace roof gas system, a coke oven gas injecting system, a dust injecting system, a slag dry-granulation and residual heat recovering system and an oxygen system. Additionally an apparatus and method for hot transferring and hot charging of ironmaking raw material is disclosed. | 12-13-2012 |
