Abstract

A process for obtaining metal powders, preferentially iron powder, for burners to produce energy is described. The metal powders are obtained from metal oxide powders, preferentially iron oxide powders. The method comprises a step of preparing, during which the metal oxide powders, obtained during the combustion of the metal powders in burners, are prepared, a step of reduction, during which the metal oxide powders are reduced in a treatment chamber having an atmosphere comprising hydrogen and at a temperature of at least 900° C., preferentially at least 1000° C., obtaining reduced metal oxides, preferentially reduced iron oxides; and a step of pulverization, during which the reduced metal oxides are pulverized to obtain the metal powders.

IPC Classes  ?

• B22F 9/22 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling

Abstract

A plant (1') for obtaining metal powders, preferentially iron powder from metal oxide powders, preferentially from iron oxide powders is described. The plant (1') comprising at least one furnace (24) having a treatment chamber (28) rotatable around a first rotation axis (C) and configured to contain the metal oxide powders, to be transformed into metal powders, a first actuator device configured to induce a rotation of the treatment chamber (28) around the first rotation axis (C), a plurality of grinding bodies (29) arranged in the treatment chamber (28), a heating device configured to heat, in use, an internal space (29) of the treatment chamber (28) to a temperature of at least 900°C, preferentially at least 1000°C, and a conditioning device configured to introduce, in use, hydrogen and/or maintain a desired concentration of hydrogen in the treatment chamber (28).

IPC Classes  ?

• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• B22F 9/22 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
• F27B 11/00 - Bell-type furnaces
• F27B 7/08 - Rotary-drum furnaces, i.e. horizontal or slightly inclined externally heated

Abstract

A process for obtaining metal powders, preferentially iron powder, for burners to produce energy is described. The metal powders are obtained from metal oxide powders, preferentially iron oxide powders. The method comprises a step of preparing, during which the metal oxide powders, obtained during the combustion of the metal powders in burners, are prepared, a step of reduction, during which the metal oxide powders are reduced in a treatment chamber (4; 28) having an atmosphere comprising hydrogen and at a temperature of at least 900°C, preferentially at least 1000°C, obtaining reduced metal oxides, preferentially reduced iron oxides; and a step of pulverization, during which the reduced metal oxides are pulverized to obtain the15 metal powders.Main Figure: 1

IPC Classes  ?

• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• B22F 9/22 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
• F27B 7/08 - Rotary-drum furnaces, i.e. horizontal or slightly inclined externally heated

Abstract

A process for obtaining metal powders, preferentially iron powder, for burners to produce energy is described. The metal powders are obtained from metal oxide powders, preferentially iron oxide powders, The method comprises a step of preparing, during which the metal oxide powders, obtained during the combustion of the metal powders in burners, are prepared, a step of reduction, during which the metal oxide powders are reduced in a treatment chamber ( 4; 28 ) having an atmosphere comprising hydrogen and at a temperature of at least 900 ° C, preferentially at least 1000 ° C, obtaining reduced metal oxides, preferentially reduced iron oxides; and a step of pulverization, during which the reduced metal oxides are pulverized to obtain the metal powders.

IPC Classes  ?

• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• B22F 9/22 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
• F27B 11/00 - Bell-type furnaces
• F27B 7/08 - Rotary-drum furnaces, i.e. horizontal or slightly inclined externally heated

Goods & Services

Metal powders for use in thermal spraying; powder coatings; inorganic metal-oxide pigments; colored metal powders; preparations for protecting metals; epoxy resin coatings with light metal; organometallic coating materials; coating compositions for application on stone [paints]; metals in foil form for painters, decorators, printers and artists; metals in powder form for use in painting, decorating, printing and artwork. Cleaning, polishing, degreasing and abrasive preparations; polishing powders; abrasives; abrasive sand; abrasive granules; abrasive sheets; carbides of metal [abrasives]; abrasive polishing preparations. Common metals and their alloys, metal ores; building and construction materials of metal; powdered metal for manufacturing processes; powdered metals; metallurgical powders; steel constructions; solder (metal) for stainless steel; granulated iron; goods of metal, semi-processed or unprocessed, without specified use; sheets of metal material for packaging; metal reinforcement materials; metal cladding.

Goods & Services

Metallic powders for use in thermal spraying; Powder coatings; Inorganic metal oxide pigments; Coloured metallic powders; Protective preparations for metals; Epoxy resins filled with light metal [coatings]; Organometallic coating materials; Coating compositions for application to stonework [paints]; Metal foil for painters, decorators, printers and artists; Metals in powder form for use in painting, decorating, printing and art. Cleaning, polishing, scouring and abrasive preparations; Polishing powders; Abrasives; Abrasive sand; Abrasive granules; Grinding foils; Carbides of metal [abrasives]; Abrasive preparations for polishing. Common metals and their alloys, Ores; Metal materials for building and construction; Metal powders used in manufacturing; Metals in powder form; Metals in powder form; Steel fabrications; Solder (Metal -) for stainless steel; Pelletized iron; Unprocessed and semi-processed materials of metal, not specified for use; Foils of metal for wrapping and packaging; Reinforcing materials of metal; Metal cladding.

Goods & Services

Metals in foil and powder form for painters, decorators, printers and artists. Cleaning, polishing, scouring and abrasive preparations;balls of metal (materials for cutting and abrasion). Powders, pellets and balls of metal for industrial use, except those used for the production of fireworks and those intended as materials for cutting and abrasion; common metals and their alloys; goods of common metal not included in other classes. Powders and pellets of metal (for the production of fireworks).

Goods & Services

Metals in foil and powder form for painters, decorators, printers and artists. Cleaning, polishing, scouring and abrasive preparations;balls of metal (materials for cutting and abrasion). Powders, pellets and balls of metal for industrial use, except those used for the production of fireworks and those intended as materials for cutting and abrasion; common metals and their alloys; goods of common metal not included in other classes. Powders and pellets of metal (for the production of fireworks).

Goods & Services

Metals in foil and powder form for painters, decorators, printers and artists; metallic powders and grains for sandblasting. Cleaning, polishing, scouring and abrasive preparations. Common metals and their alloys; goods of common metal not included in other classes.