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Matches 1 - 50 out of 2,671

Document Document Title
WO/2018/109283A1
The present invention relates to a process for separating metals using a series of precipitations from waste materials of the zinc or steel industry, or both. The method is characterized in carrying out the precipitations using hydroxide...  
WO/2018/100539A1
A method of controlling iron in a hydrometallurgical process is disclosed. The method may comprise the steps of: leaching (14, 114) a feed slurry (2, 102); forming a pregnant leach solution (12a, 12b; 112a, 112b); removing a first leach ...  
WO/2018/091361A1
A method for extracting and separating Gold, Silver, Copper, Zinc and/or Lead from an Arsenic-containing ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calcium-containing mat...  
WO/2018/081856A1
A process for treatment of zinc-containing waste materials includes the steps of: (a) Combining the zinc-containing waste material with iron chloride into a solid, pelletised form which includes iron oxide, zinc oxide and iron chloride, ...  
WO/2018/007297A1
The present disclosure provides a process for selectively separating a first heavy metal such as copper from a liquid medium containing at least the first heavy metal in dissolved form, by: (a) contacting the liquid medium with a solid s...  
WO/2017/193725A1
Provided are a system and method for treating a cadmium-containing solution. The system comprises: a cadmium-containing solution storage apparatus (100); a first conveying pipe (200) connected to the cadmium-containing solution storage a...  
WO/2017/193724A1
Provided are a system and method for treating a copper-containing solution. The system comprises: a copper-containing solution storage apparatus (100); a first conveying pipe (200) connected to the copper-containing solution storage appa...  
WO/2017/187973A1
[Problem] To provide: a method for processing iron and steel dust, which is more advantageous than a Waelz method in terms of energy and economy; a method for producing zinc; and a method for producing a staring material for iron and ste...  
WO/2017/129816A1
The invention relates to a method for the carbothermal reduction of zinc oxide to zinc, comprising the following steps: feeding zinc oxide and coal into a furnace as reactants, reducing the zinc oxide to liquid zinc melt (20) by using th...  
WO/2017/090784A1
The present invention relates to an eco-friendly zinc smelting method, and provides a method for treating zinc ferrite, the method comprising the steps of: generating a fumed metal oxide, sulfite offgas, and eco-friendly clean slag throu...  
WO/2017/078315A1
The present invention relates to a method for recovering valuable metals from valuable metal-containing target waste. An embodiment of the present invention proposes a method for recovering valuable metals from valuable metal-containing ...  
WO/2017/070102A8
Methods and systems for removing polar compounds from a metal-containing solution. According to various example aspects, methods and systems for removing hydrolysis byproducts and other polar compounds from a metal-loaded organic solutio...  
WO/2017/070102A1
Methods and systems for removing polar compounds from a metal-containing solution. According to various example aspects, methods and systems for removing hydrolysis byproducts and other polar compounds from a metal-loaded organic solutio...  
WO/2017/064735A1
Method for the production by thermal way of a concentrated solid - substantially iron free - enriched in contents of indium, germanium, zinc, silver, lead and possibly other metals, starting from the residuals generated in the zinc produ...  
WO/2017/064735A8
Method for the production by thermal way of a concentrated solid - substantially iron free - enriched in contents of indium, germanium, zinc, silver, lead and possibly other metals, starting from the residuals generated in the zinc produ...  
WO/2017/054057A1
A method for recovering zinc from an aqueous ammoniacal ammonium carbonate zinc solution, the method comprising the steps of: Contacting the aqueous ammoniacal ammonium carbonate zinc solution with an organic solution of a zinc extractan...  
WO/2017/031949A1
A method for leaching low-grade lead-zinc oxide ores by means of electrooxidation comprises the following steps: A, pulping: carrying out crushing and ball milling on the low-grade lead-zinc oxide ores, and adding water to mix the ores t...  
WO/2017/014204A1
With attention directed at the reduction treatment gas that contains metallic zinc vapor generated when reduced iron is manufactured from electric furnace dust that contains iron oxides and zinc oxide, the present invention addresses the...  
WO/2016/198976A1
A method of integrated chemical and bacterial leaching of a base metal from a mineral is disclosed. The method includes leaching a base metal from a mineral with an ammoniacal thiosulfate chemical leaching solution having a pH from about...  
WO/2016/162138A1
Method for working up zinc-containing dusts or grinding dusts, such as for example converter, arc-furnace, top-gas or sintering dusts from steel or high-grade steel production, wherein a) the dusts are mixed with a CaO carrier in order t...  
WO/2016/081976A1
A split solvent extraction process for treating pregnant leach solution (PLS) from a heap leach process is described. The solvent extraction process comprises the steps of partitioning the heap leach process to produce two or more pregna...  
WO/2016/045522A1
Disclosed is a fuming furnace (10) with a lead collecting and discharging function, the fuming furnace (10) comprising a furnace body (101); the furnace body (101) is provided with a hearth (1011) therein and a tuyere (1012) thereon; the...  
WO/2016/040244A3
An environmentally friendly (e.g. no acid, base, or cyanide) system and process for large scale extraction of metal ion into aerobic molten salt (or ionic liquid) and the electrodeposition of metal (e.g. copper, gold, silver, etc.) from ...  
WO/2016/000231A1
A method for processing a zinc oxychloride-containing secondary material comprises the following steps: 1) leaching a zinc oxychloride-containing secondary material I by using an acid solution; 2) selectively extracting zinc by using a P...  
WO/2015/192762A1
A ferric hydroxide-based raw material containing high value elements, an application thereof, and a preparation method therefor. The preparation method comprises preparing a ferric hydroxide-based raw material containing high value eleme...  
WO/2015/192234A1
Hydrometallurgical techniques for the selective recovery of Zn, Mn and Pb in that order from sludges or various metallurgical residues can include leaching steps to extract the zinc and manganese; the steps of removing iron, aluminum and...  
WO/2015/162902A1
The purpose of the present invention is to enable high-purity manganese extremely reduced in contamination by zinc, carbon, etc. to be easily obtained at low cost by: selecting out manganese dry batteries and/or alkaline manganese dry ba...  
WO/2015/146307A1
A method for removing a metal contained in an organic-solvent solution thereof, the method comprising dissolving a polymer in the metal-containing organic-solvent solution to form a composite of the metal with the polymer and separating ...  
WO/2015/135041A1
A method for treating a silver-containing zinc alloy, the method comprising treating the alloy in a process vessel under conditions of elevated temperature and sub-atmospheric pressure so as to selectively vaporise the zinc, providing a ...  
WO/2015/132473A1
A method and an arrangement for treating oxide material. The method comprises: a) a grinding step for grinding the oxide material, and b) a mixing step for mixing the oxide material with an acid. The grinding step and/or the mixing step ...  
WO/2015/124507A1
The present invention relates to a process for reducing the amounts of zinc and lead in starting materials comprising iron which comprises the steps of: - selectively leaching Zn and Pb comprised in the starting materials by mixing the s...  
WO/2015/105472A1
The invention relates to slurry treatment technology. During disintegration of feedstock, oversized inclusions are removed, a pulp is prepared from the resulting product, the pulp is processed in a flow using high-amplitude ultrasonic vi...  
WO/2015/039177A1
In accordance with the present invention there is provided a method for leaching zinc from a carbonate-hosted ore, the method comprising the method steps of: applying an aqueous solution of a curing agent to the carbonate-hoste ore, prod...  
WO/2015/030235A1
A zinc production method including: a chlorination step (101) in which oxygen gas (2) and a crude zinc chloride vapor (3) are obtained by contacting an electric furnace dust (1), which contains zinc oxide, or a secondary dust (1), which ...  
WO/2015/016086A1
[Problem] To provide a method for recovering zinc from electric-furnace steelmaking dust and a device for recovering zinc from electric-furnace steelmaking dust, with which it is possible to recover high-purity zinc metal in a relatively...  
WO/2014/208944A1
Disclosed is a method for preparing high purity aluminum chloride and metal zinc, the method comprising the steps of: melting zinc chloride; subjecting the zinc chloride to a reaction with the addition of 1-5 parts by weight of a mixture...  
WO/2014/181833A1
A zinc production method comprises: a reaction step including a leaching step (101) of bringing electric arc furnace dust (1) containing zinc oxide or the like into contact with chlorine gas (8), thereby obtaining a zinc oxide component ...  
WO/2014/177903A1
The invention relates to a method for bioleaching and solvent extraction with selective recovery of copper and zinc from polymetal concentrates of sulfides, comprising a process of bioleaching and reduction of ferric ion and a process of...  
WO/2014/177931A3
A method for preparing Electric Arc Furnace dust (EAFD) for metal recovery, comprising: a) mixing the EAFD comprising zinc oxide or lead oxide, or a mixture of both, with a liquid and a binder to produce an EAFD mixture; b) producing a s...  
WO/2014/124494A9
A method of producing a controlled reactivity zinc oxide including the step of: heat treatment a zinc oxide powder or precursor thereof at a temperature of at least 450 °C.  
WO/2014/124494A1
A method of producing a controlled reactivity zinc oxide including the step of: heat treatment a zinc oxide powder or precursor thereof at a temperature of at least 450 °C.  
WO/2014/112222A1
[Problem] To expand the uses of byproduct ash from blast furnaces and contribute to the formation of a recycling-oriented society. [Solution] Byproduct ash from a blast furnace is separated into unburned carbon and ash, the separated unb...  
WO/2014/109161A1
When starting up a dezincification plant used in a hydrometallurgical dezincification process for nickel, reduction in production quantity can be inhibited by suppressing reduction in throughput in the dezincification plant, and filtrati...  
WO/2014/047761A1
Disclosed is a method for producing a high-purity nanometer zinc oxide from low-grade zinc oxide ore by an ammonia process. The method comprises: taking slaked lime of 3-5% mass of the low-grade zinc oxide ore for activation before leach...  
WO/2014/047762A1
Disclosed is a method for producing a nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization. The method comprises: taking ammonia water-ammonium bicarbonate solution as a leaching agent; adding 0.3-0.5 kg sodium f...  
WO/2014/047759A1
Disclosed is a method for producing a high-purity nanometer zinc oxide from electrolytic zinc acid-leaching residues by an ammonia process. The method comprises: adding slaked lime being 1-5% of the mass of electrolytic zinc acid-leachin...  
WO/2014/047764A1
Disclosed is a method for producing a high-purity nanometer zinc oxide from steel plant smoke and dust by ammonia decarburization. The method comprises: leaching with an ammonia water-ammonium carbonate solution as a leaching agent, addi...  
WO/2014/047763A1
Provided is a method for producing a high-purity nanometer zinc oxide from steel plant smoke and dust by an ammonia process. The method comprises the following steps of: leaching the steel plant smoke and dust, carrying out purification ...  
WO/2014/022882A1
A method for recovering zinc from slag derived from lead smelting comprises subjecting the slag to a leaching step under conditions in which zinc is dissolved into solution and silica present in the slag dissolves and re-precipitates in ...  
WO/2014/013092A1
The invention is based on the recirculation of a solution containing no, or a low content of, iron, such that the final acidity conditions achieved are suitable for obtaining efficient precipitation of iron in the form of jarosite. In on...  

Matches 1 - 50 out of 2,671