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AssigneeLuossavaara-Kiirunavaara AB
InventorsOla Eriksson, Björn Åström, Daniel Marjavaara, Örjan Fjällborg
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A method of reduction of a metal oxide material and a metal material production configuration adapted for manufacture of reduced metal material, a metal oxide material production unit produces a metal oxide material holding thermal energy, a direct reduction facility is configured for introduction of a reducing agent adapted to react with the metal oxide material. The method includes the steps of; charging the metal oxide material, holding thermal energy; introducing the reducing agent; reducing the metal oxide material to reduced metal material by utilizing the thermal energy of the metal oxide material to heat or further heat the introduced reducing agent for achieving a chemical reaction; and discharging the reduced metal material from the direct reduction facility. A direct reduction facility and a data program configured to execute an automatic or semi-automatic manufacture of reduced metal material ready to be transported to a metal production site.
A method of reduction of a metal oxide material (5), produced by a metal oxide material production unit (3), the metal oxide material (5) being transferred from the metal oxide material production unit (3) into a direct reduction facility (7) for charging the metal oxide material (5) holding thermal energy that originates from a manufacturing thermal process of the metal oxide material production unit (3), the direct reduction facility (7) is configured for introduction of a reducing agent (6, 31) adapted to react with the metal oxide material (5) holding thermal energy, the method is characterized by the steps of:
The method according to any of the preceding claims, wherein the reducing agent comprises a hydrogen gas (6) generated by an electrolysis unit (19), the method comprises the step of decomposing water (w) into said hydrogen gas (6) and into an oxygen gas (10).
The method according to any of the preceding claims, wherein the reducing agent comprises Carbon monoxide and/or hydrogen gas and/or hydrocarbons, such as methane and/or propane and/or ethane and/or any other hydrocarbon group.
The method according to any of the preceding claims, wherein the method comprises a step of transferring excess heat from the direct reduction facility (7) to the metal oxide material production unit (3).
The method according to any of the preceding claims, wherein a waste reduction fluid (8) is transferred from the direct reduction facility (7) to the metal oxide material production unit (3), which waste reduction fluid (8) of the reducing agent (6) being used for the manufacturing thermal process provided by the metal oxide material production unit (3) and/or the waste reducing fluid (8) comprising hydrogen gas is fed back to the direct reduction facility (7) wherein the metal material production configuration (1) comprises a feeding element configured for feeding the waste reducing fluid (8) back to the direct reduction facility (7).
The method according to any of the preceding claims, wherein the manufacturing thermal process comprises pre-heating the metal oxide material (5) for providing the metal oxide material (5) holding thermal energy by means of a metal oxide material pre-heating apparatus (203, 207).
A metal material production configuration (1) adapted for manufacture of reduced metal material (RM), the configuration (1) is characterized by;
A direct reduction facility (7) configured to be integrated with or configured to be coupled to a metal oxide material production unit (3), enabling charging of a metal oxide material (5), holding thermal energy that originates from a manufacturing thermal process adapted for producing the metal oxide material (5), into the direct reduction facility (7), and the direct reduction facility (7) is configured for receiving a reducing agent (6, 31) for providing a chemical reaction.
A metal oxide material production unit (3) configured to produce a metal oxide material (5) from a metal ore mixture (24), wherein the produced metal oxide material (5) holds thermal energy that originates from a manufacturing thermal process of the metal oxide material production unit (3), and the metal oxide material production unit (3) is configured to transfer the metal oxide material (5) holding thermal energy to a direct reduction facility (7) configured to reduce the metal oxide material (5), holding thermal energy, into reduced metal material (RM) by a chemical reaction between the metal oxide material and a reducing agent (6, 31) introduced into the direct reduction facility (7).
A method of producing a metal oxide material, wherein the oxidation is performed with oxygen-enriched process gas maintaining high oxygen pressure during the oxidation and/or sintering process of the manufacturing thermal process and/or for carrying heat.
A metal material production configuration (1), wherein the metal material production configuration (1) is provided with feeding arrangement for providing an oxygen-enriched process gas maintaining high oxygen pressure during the oxidation and/or sintering process of the manufacturing thermal process and/or for carrying heat.
An integrated metal material production configuration (1), characterized by the integrated metal material production configuration (1) comprises a direct reduction facility (7) integrated with a metal oxide material production unit (3) and/or a electrolysis unit (19) and/or a hydrogen storage unit (26′) and/or an oxygen storage unit (26″) and/or a metal making industry (17) and/or a metal oxide material pelletizing plant (201) and/or a metal oxide material pre-heating apparatus (203) and/or a metal oxide material cooler/pre-heating apparatus (207) and/or a steel mill industry and/or a minimill industry using a scrap metal melting electric arc furnace EAF and/or a carburizing reactor (248) and/or a carburizing zone (249) and/or a carbon source provider (CSE).
A method of producing a metal oxide material, wherein an oxygen gas (10) is used in an induration process provided by a metal oxide material production unit (3).
A metal material production configuration (1), wherein the metal material production configuration (1) is provided with a feeding device configured to feed an oxygen (10) gas into an indurating apparatus (22).
A method of producing a metal oxide material, wherein a heated process gas constitutes an oxygen deficient process gas fed to a drying and/or pre-heating unit (36) of a metal oxide material production unit (3).
A metal material production configuration (1), wherein the metal material production configuration (1) comprises a feeding member configured to feed oxygen deficient process gas to a drying and/or pre-heating unit (36) of a metal oxide material production unit (3).
A metal material production configuration (1), wherein a feeding element, such as a pipe arrangement, is configured to transfer a waste reduction fluid, such as an exhaust gas comprising hydrogen gas (6), from the direct reduction facility (7) to the metal oxide material production unit (3) for pre-heating and/or heating the metal ore mixture (24) and/or for indurating the metal ore mixture (24) in the manufacturing thermal process.
A metal material production configuration (1), wherein the waste reduction fluid of the reducing agent being used for pre-heating and/or heating the metal ore mixture (24) and/or the process gas in the indurating process.
A method of producing a metal oxide material, wherein hydrogen gas (6) is fed to a metal oxide material production unit (3) for heating a metal ore mixture in an induration process configured to produce said metal oxide material (5).
A metal material production configuration (1), wherein the metal material production configuration (1) comprises a feeding device for feeding hydrogen gas (6) to a metal oxide material production unit (3) for heating a metal ore mixture in an induration process.
A method of producing a metal oxide material, wherein a hydrogen gas (6) is fed to a metal oxide material production unit (3) for heating an oxygen-enriched process gas (OE) by means of a hydrogen gas burner device (BD).
A metal material production configuration (1), wherein the metal material production configuration (1) comprises means for feeding hydrogen gas (6) to a hydrogen gas burner device (BD) of metal oxide material production unit (3) for heating an oxygen-enriched process gas (OE).
Dependencies are inferred from the claim text.