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WO/2011/135991A1 |
Disclosed is a valuable metal recovery method that has excellent valuable metal selectivity and recovery efficiency, and furthermore is capable of reusing materials that were used in the recovery of a valuable metal. The valuable metal r...
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WO/2011/132705A1 |
Disclosed is a treatment agent that can efficiently remove heavy metals from contaminated water by putting a treatment agent into contact with contaminated water, wherein the treatment agent comprises a compound — that reduces the pH o...
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WO/2011/040344A1 |
Disclosed is a method for producing briquettes, by which briquettes having enhanced strength can be produced even when the amount of a binder used therefor is reduced as much as possible. Specifically disclosed is a method for producing ...
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WO/2011/020181A1 |
Calcium (Ca), manganese (Mn) and magnesium (Mg) carbonate plus lead (Pb) and zinc (Zn) sulphide minerals in a permeable host, crushed ore, concentrates or as mine discharge tailing are selectively solution mined (in-situ or ex-situ) with...
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WO/2011/022514A1 |
The present disclosure provides a solder dross removal apparatus (10) and methods useful for collecting and treating metal oxides (dross) formed in a soldering process, as well as for reclaiming solder from the dross. Among numerous othe...
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WO/2011/017855A1 |
A furnace for lead-slag reduction includes a furnace body (1), bases (4) for supporting the furnace body (1), lances (6) for injecting pulverized coal and electrodes (7). The furnace body (1) includes a hearth, a feed inlet (11), a lead-...
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WO/2011/013149A1 |
An all-wet process for reclaiming the lead content of impure electrode paste or slime from discarded lead batteries and/or lead minerals, in form of high purity lead compound, comprises a) suspending the impure lead containing material i...
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WO/2011/014716A2 |
A unique pyrometallurgical lead refining process includes adding a Lewis acid component and an Arrhenius base compound to a molten lead bullion. The Lewis acid component and Arrhenius base compound are added in stoichiometric amounts tha...
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WO/2010/082065A2 |
A process for recovering a metal chloride or mixed metal chloride from a solid waste material comprising recoverable metal containing constituents produced by lead, copper or zinc smelting and refining processes, said process comprising ...
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WO/2010/057444A1 |
A sealed dissociation and desulfurization reactor comprises a desulfurization reaction tank body, a stirring mechanism, a feed inlet (1), a discharge outlet and a heating apparatus, wherein the stirring mechanism comprises a stirring tra...
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WO/2010/019062A1 |
According to this invention, a process for obtaining zinc, lead, gold and silver concentrate from a complex low - concentration ore. The process consists of several stages: three - staged basic grinding and two - staged classification, c...
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WO/2010/005023A1 |
The objective is to manufacture briquettes with increased strength, even when using minimal quantities of binder and water. To achieve this, a briquette manufacturing method includes a process in which primary particulates are formed usi...
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WO/2009/068988A2 |
The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a so...
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WO/2008/087684A1 |
Wet process of low environmental impact recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity- lead carbonates that are convertible to highly pure lead oxide by heat treatment in oven...
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WO/2008/077905A1 |
The presentinvention relates toa device for processinguncrushed lead storage batteries including, in combination: -a primary crusher (10) for coarsely crushing the batteries, -a rotary screener (30) for screening the debris from crushing...
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WO/2008/074575A1 |
In the refining of crude lead, particular constituents such as arsenic, tin and antimony are removed either by selective oxidation by means of air or oxygen or by selective oxidation by means of a salt slag. In the selective oxidation by...
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WO/2008/056125A1 |
The present invention describes a method of recycling lead from lead containing waste, the method comprising the steps of mixing the battery paste with aqueous citric acid solution so as to generate lead citrate; isolating lead citrate f...
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WO/2008/014538A1 |
A process for lead slag reduction subjects the slag to top-submerged lance injection of oxygen containing gas and fuel, via a vertically suspended lance having its lower tip end submerged in the slag. The injection generates a combustion...
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WO/2008/002114A1 |
The invention relates to non-ferrous metallurgy, in particular to methods for reprocessing lead-containing materials. The aim of the invention is to increase a lead extraction into a crude metal, to improve a specific performance and to ...
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WO/2007/038840A1 |
A method for producing lead involves feeding lead concentrate, flux and solid fuel passing to a feed preparation unit (10). The prepared, mixed feed is then passed to a lead smelting furnace (14), such as an ISASMELT furnace or other top...
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WO/2007/026322A2 |
The present invention relates to a plant (100) for the recovery of spent electric batteries, comprising an apparatus (301;301') for crushing said batteries and one or more apparatuses (401-701;401'-601) for separating and recovering the ...
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WO/2006/070052A1 |
The invention relates to a method, by means of which the valuable metals contained in a sulphidic, multicomponent concentrate are recovered using hydrometallurgical treatment. One constituent of the concentrate is copper sulphide, which ...
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WO/2006/057812A2 |
A method and apparatus for decontaminating molten metal compositions. A molten metal composition (typically containing elemental lead or a lead alloy) is initially provided which also includes various inorganic contaminants. The composit...
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WO/2005/074651A2 |
The invention provides methods of remediating lead and other heavy metals in ammunition traps and shooting ranges. One or more remediation agents is added to a trap or a shooting range. The remediation agents) interact with and 'fix' hea...
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WO/2005/068669A1 |
A method of slag fuming wherein a slag containing arsenic or arsenic and antimony together with zinc and lead is heated and reduced in a slag fuming furnace, and zinc and lead are separated by evaporation, characterized in that it compri...
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WO/2005/031014A1 |
The invention relates to a process for the separation and recovery of non-ferrous metals from zinc-bearing residues, in particular from residues produced by the zinc manufacturing industry. The process comprises the steps of: - subjectin...
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WO/2005/012583A1 |
Abrasion mills for the production of lead oxide call for the use of mechanically produced lead shavings, taken directly from bars or other adequately titrated lead bars. The flat, helical lead shavings are produced using specially design...
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WO/2005/005674A1 |
The invention relates to a process for the separation and recovery of non-ferrous metals from zinc-bearing residues, in particular from residues produced by the zinc manufacturing industry. The process allows for the valorisation of meta...
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WO/2004/105989A2 |
When dross (20) is removed from a molten-solder reservoir (12), a substanÂtial amount of molten solder is often removed with the dross. This molten solder can be separated from the dross and returned to reservoir via a conduit for reuse...
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WO2004034427B1 |
The invention includes solder materials having low concentrations of alpha particle emitters, and includes methods of purification of materials to reduce a concentration of alpha particle emitters within the materials. The invention incl...
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WO/2004/024961A1 |
A method for the reduction treatment of a metal oxide, characterized in that it comprises using, as a raw material, a powder containing a metal oxide, and an alkali metal and a halogen element, and further optionally carbon, mixing said ...
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WO/2003/074743A2 |
A process for recovering bismuth, from lead-bismuth containing material, which is characterized by a series of steps of selective oxidation of lead from said material with the addition of at least one slag forming agent which produces a ...
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WO/2003/061893A1 |
The invention provides an apparatus (10) that separates solder from solder dross (65), comprising first and second rolls (15, 20) and a fixture (23). The first roll (15) has a substantially cylindrical surface and is rotatable about a fi...
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WO/2003/049867A1 |
A new reagent for the application in the preparation of mineral raw materials, mainly sulphide and oxyde mono-and polymetallic ores of non-ferrous metals, which are used as a corrosion inhibitor of the equipment and grinding bodies and a...
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WO/2003/028926A1 |
The aim of the invention is a method for the production or treatment of lead dust and to provide lead dust with which the interference of adhesion of the fine particles to each other and to metals and plastic materials (van der Waal's fo...
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WO/2003/025235A1 |
A process for the treatment of battery paste originating from spent batteries, wherein the battery paste is subjected to a first lead precipitation step at high alkalinity to partially precipitate and separate the lead, the liquid residu...
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WO/2003/020989A1 |
An improved method and apparatus for recovering metal values from Electric Arc Furnace (EAF) dust, particularly zinc and iron values, by mixing EAF dust and carbonaceous fines to form a particulate mixture; heating the mixture at a suffi...
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WO/2002/070756A2 |
A method of dissolve at least one metal from jarosite or other iron hydroxy sulfate containing-material which includes the steps of subjecting the material to alkaline treatment in a brine solution to facilitate jarosite decomposition, a...
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WO/2002/055746A1 |
The invention relates to an apparatus for feeding finely divided solids, containing at least sulphidic metal concentrate, and oxygenous oxidizing gas into a suspension smelting furnace, said apparatus comprising elements for conducting s...
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WO/2002/020858A1 |
The invention concerns a method for recuperating metal elements from zinc-bearing raw materials, characterised in that it consists in extracting from said zinc-bearing raw materials the elements having affinity for lead, by contacting (3...
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WO/2001/098547A2 |
A method of processing flue dust that contains one or more compounds from a first group of zinc, lead and cadmium compounds, and contains iron compounds, involves heating the flue dust to cause a substantial portion of one or more of the...
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WO2001056684A9 |
The invention relates to a method of treating a halogen containing solid or semi solid waste material from a flue gas cleaning process, wherein the amount of alkaline compounds is sufficient to provide a suspension of the waste material ...
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WO/2001/079570A1 |
The invention concerns a method for eliminating bismuth from molten lead with magnesium and calcium, which consists in inputting magnesium and calcium in the form of lumps of two Mg-Ca alloys, one containing predominantly Mg, the other c...
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WO/2001/055460A1 |
The invention relates to a method for reprocessing dust or dust mixtures containing alkalis and heavy metals such as e.g., steel works dust, ore dusts or blast furnace dust. According to said method, the dust is introduced onto or into a...
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WO/2001/025495A1 |
The invention concerns a method for pyrometallurgical treatment of waste, in particular, from iron and steel production, in a first zone comprising vertically spaced hearths of a multistage furnace which consists in: (a) introducing the ...
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WO/2001/023067A1 |
Compositions and methods for selectively binding metal ions from source solutions are disclosed. The compositions include 1) polyamide-containing ligands covalently bonded to a particulate solid support, and 2) polyamide-containing polym...
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WO/2001/021846A1 |
A method for the recovery of metallic lead from substances containing lead, such as lead ores galena or exhausted lead acid storage batteries. The method includes the steps of treating the lead containing substances, either with or witho...
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WO/2000/066796A1 |
The invention concerns a method using pyrometallurgy for treating waste containing metals generally in oxidised form, in a first zone including vertically spaced hearths, of a multistage furnace, which consists in: introducing the waste ...
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WO/2000/061825A1 |
Raw lead to be refined is leached in a leach apparatus with a leach solution containing fluoro compounds, in particular ferric fluorotitanate. During the leaching step, lead is dissolved, with ferric fluoro compounds being reduced to fer...
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WO/2000/042829A1 |
The disclosure provides an article (6) having a circuit (1) mounted with parts (3) characterized by comprising an electronic part (3) soldered with a lead free solder (2) and having an identification marking indicating no inclusion of le...
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