TH28095C3 - Direct metal smelting process - Google Patents

Abstract

DC60 (20/08/42) The direct smelting process for the manufacture of metal from metal-containing feed materials is what has been revealed. The process includes casting a molten material bath with metal layer (15) and dross layer (16) on the metal layer in a container in a metallurgical vessel, injecting a metal-containing feed material. And materials containing charcoal Solid elements into the metal layer Through several spoons / nozzles (11) and the smelting of metal-containing materials Elements to a metal in the metal layer In addition, the process includes splashing the molten material into a small droplet, and a stream into the upper cavity above the calmed surface of the molten material bath. (23) The process includes injecting oxygen-rich gas into It also goes into the container via the spout / nozzle (13) to make the reaction gas released from the material bath. Molten, after burning occurs By doing this, the splashing, small droplets, and currents of the molten material that rise and subsequently run down in the zone of transformation allow for better heat transfer to the bath of the molten material, and by this method the zone Of the change will reduce the heat loss through the side wall that is in contact with the zone Of the change to a minimum Process is characterized by process control by Maintain high levels of dross Direct smelting process for producing metals from metal-containing feed materials. Is what has been revealed The process includes making a molten bath with a metal layer (15) and a layer of dross (16) on the metal layer in a container in a metallurgical vessel, injecting a metal-containing feed material. And materials containing solid carbon into the metal layer Through multiple spoons / nozzles (11) and metal-based smelting of metallic materials in the metal layer In addition, the process includes splashing the molten material, small droplets, and current into the upper cavity above the calmed surface of the molten material bath to induce a field of transformation (23). Injecting oxygen-rich gas into It is also passed into the vessel via the spout / nozzle (13) to allow the reaction gas released from the molten material to burn afterwards. By doing so, splash parts, tiny droplets, and a stream of molten material that run up. And later running into the transition zone allows better heat transfer to the molten material bath. And in this way, the transition zone minimizes the heat loss through the side walls exposed to the transition zone. The process is characterized by process control by keeping the available residue at a high level.

Claims (1)

1. The direct smelting process for producing metal from metal-containing feed materials, including the process of (a) Making a molten bath with a metal layer And a layer of dross on the metal layer in a metallurgical vessel (b) Injection of metal-containing feed materials And the solid carbon material enters the metal layer via several liquids / nozzles that are located above And lead out towards the bottom towards the metal layer This causes the molten material to be spliced into splatter, droplets, and currents into the upper space above the defined calm surface of the molten material bath to create a zone of transformation. (c) the smelting of the metal-containing material into the metal layer, and (d) the injecting oxygen-rich gas into the container via one or more spouts / nozzles to burn the reaction gas. That was released from the molten material later In which, by the main rise and fall of the splash part, the tiny droplets, and the flow of the molten material in the region of transition, the heat transfer to the molten material bath progresses better. And in this way, the transition zone minimizes the heat loss from the container through the side wall exposed to the transition zone. And the process includes a process control step by keeping the existing dross at a high level by controlling the dross to a depth of at least 1.5 m. 2. The processes as defined in claim 1 include: Maintaining high levels of dross by controlling the dross to a depth of 0.5 to 4 m 3. The process as outlined in claim 2 includes the treatment of high residue by Control of the dross layer to a depth of 1.5 to 2.5 meters 4. The process as defined in claim 1 includes the control of the weight ratio of the metal: dross to be between 4: 1 to 1: 2. 5. The process follows. As set out in any of the previous claims, including the weight ratio of the metal: dross to be between 3: 1 and 1: 1 in stable operating conditions of the process. 6. The process as outlined in claim 5 includes the preservation of high levels of residue. By controlling the weight ratio of the metal: dross to be between 3: 1 and 2: 1 in the stable operating conditions of the process. 7. Process As set out in any of the preceding claims, the procedure (c) includes the smelting of at least a majority of the metallic component in the metal layer. 9. Process as set out in any of the preceding claims, including at and injecting oxygen-rich gas at a flow rate, to provide (a) Oxygen-rich gas is injected through the dross layer. And (b) a stream of oxygen-rich gas causes it to be refracted as a splash, small droplets, and a stream of molten material around the share of one spade / nozzle, or More than one and a continuous range of gas / nozzle end system or one or more 9. Process, as set out in any of the previous claims, includes the control of heat loss from the container. Most of the metal dross is splashed onto the side wall of the container exposed to the transition region by one adjustment. Or more as follows (i) The amount of dross in the molten material bath. (ii) The injection flow rate of oxygen-rich gas through a pail / nozzle for injecting oxygen-rich gas Assemble one And (iii) flow rate of metal-containing feed materials And carbon-based materials via dowels / nozzles 1 0. Process as set out in any of the preceding claims. Including injecting metal-based materials and carbon-based materials into metal layer 1 1. The process, as defined in claim 10, includes several spears / nozzles over it and extending downwards toward the metal layer.