TH40818A3 - Direct smelting - Google Patents

Abstract

DC60 (08/09/42) A process for the direct smelting of metal-fed feedmaps was revealed. The process consists of a process of reducing the partial-metal feed material. And evaporation of the volatile part Most of the coal In a container for pre-pressing And the production of feed materials containing partially reducted metals and charts. Smelting of metal-containing feeders That is partially reduced directly to molten metal in a direct smelting vessel, using char as a source of energy and as a reducing agent. And gas of the post-combustion reaction That is produced in the process of smelting directly in conjunction with air or oxygen Preheated Up to the level of More than 70% post-burn to generate the heat required for direct smelting reactions. And to keep the metal in its molten state The process for the direct smelting of metal-containing feed materials was revealed. The process consists of a process of reducing the partial metal-containing feed material. And evaporation of the volatile part Most of the coal In a container for pre-reduction And the production of feed materials containing partially reducted metals and charts. Smelting of metal-containing feeders That is partially reduced directly to molten metal in a container for direct smelting, using char as a source of energy and as a reducing agent. And gas of the subsequent combustion reaction That is produced in the process of smelting directly in conjunction with air or oxygen Preheated Up to the level of Burns post more than 70% to generate the heat required for direct smelting reactions. And to keep the metal in its molten state

Claims (1)

Disclaimer (all) that will not appear on the advertisement page: 1. Process for direct smelting of metal-containing feed materials. It consists of the procedure of (a) feeding the metal-containing feed material. (B) Reducing partially metalized feed material. And evaporation of the majority of the volatile coal in the pre-reducing vessel. And the production of a feed material containing partially reduced metal and char (c), a feed material containing partially reduced metal and the char produced in step (b) to the vessel for Direct smelting (d) using the exhausted gas from the container. For reducing the preheat as a source of energy and air preheating. Or air with a lot of oxygen and after that enter the air Or oxygen-rich air preheated to the direct smelting vessel; and (e) direct smelting of feed material containing partially reducing metal. To be molten metal in a container for direct smelting, using char as a source of energy And is a reducing agent and a gas of post-combustion reaction That is produced in the process of smelting directly in conjunction with air or oxygen Preheated To a degree of post-combustion of more than 70% to generate the heat required for the direct smelting reaction and to maintain the metal in its molten state 2.Process described in claim 1 Where the oxygen concentration in air with more than 50% oxygen by volume 3. The process described in claim 1 or 2 consists of Heating Advance to the air Or air with a lot of oxygen For steps (d) up to temperature in the range of 800-1,400 ° C and after Feed preheated oxygen or oxygen air to the direct smelting vessel in step (d) 4. The process described in claim 3, where the temperature is in the range of 1000-1250 ° C 5. The process described in any of the foregoing claims Which consists of Using the gas that was released That is directly drained from the smelting vessel It is a source of energy and air preheating. Or air with a lot of oxygen Before entering air Or the very oxygenated air that is being heated It goes directly to the smelting vessel in step (d) 6. The process described in any of Clause 3 to 5. Which consists of giving Preheat air Or oxygen-rich air in one or more hot-air furnaces; 7. Process described in one of the above-mentioned claims. Which container for Pre-reducing is a fluidized bed 8. The process described in claim 7 consists of recirculating the exhausted gas from the fluid bed back to the fluidized bed. Section 9. The process described in claim 8, consisting of at least 70 percent circulating by volume of the gas produced. Drained from fluidized bed returned to fluidized bed 1 0. Process described in one of the aforementioned claims in which procedure (e) consists of (i) Creating the melting basin With a metal layer and a slag layer On this metal shelf In a direct smelting vessel (ii) injection of a feed material containing metal and char To the metal layer Through the bulk syringe (iii) the smelting of the metal-containing feed material. (Iv) This causes the molten metal and slag to be released into stains, drips and currents in the region above the rest of the melting bath. And the creation of the transition zone and (v) the injection of oxygenated air or air. That are preheated to the container for direct smelting. Through one or more syringes and the reaction gas after combustion Released from the melting basin Which the up and down after Then of the stains, drips, and flows of the molten metal and the melt in the transition region Will help transfer the heat to the melting bath and by the transformation area Will reduce the heat loss from the container Through the side wall Exposed to the transition zone 1 1. The process described in one of the aforementioned claims. Which consists of Directly inject coal into the smelting vessel. Where coal acts as a source of energy and is Reducing agent in that container