Continued ironmaking device based on melting reduction

Abstract

The invention relates to a continued ironmaking device based on melting reduction of iron oxide containing carbon iron oxide balling (blocks). In the invention, the device is a continued ironmaking device based on melting reduction and can carry out continual tapping by pre-reducing furnace burden (3) through continually adding the furnace burden (3), extracting air, preheating, blasting and carrying out downstream roasting, and directly conveying the pre-reduced furnace burden (3) into a smelting-separating furnace (B) for continuous smelting-separation; a preheat area (4), a roasting area (5) and the smelting-separation areas behind the preheat area and the roasting area form a connected hearth; a combustion-supporting burner (8) and a secondary tuyere (7) are arranged also; preferably, the high-temperature coat gas generated in the smelting-separation area is subjected to secondary combustion in a pre-reduced furnace (A) for preheating and roasting the furnace burden (3); then the furnace burden (3) is discharged into the smelting-separation area for the further reduction, carburization and melting to separate the slag and iron; in the preheated area (4), the fuse passes through a bed of material to directly heat the furnace burden (3), and then the fuse enters a heat exchanging device (9) and a fuse process system; and a fan blasts the cool air below the bed into a hearth bottom (2) through the heat exchange device (9). The device has the advantages of short flow, reduced energy consumption, low carbon emission, low production cost, simple equipment, less occupied space, less investment and short building period.

Description

1. Technical field: [0001] The invention belongs to the field of metallurgical non-blast furnace ironmaking, and relates to a continuous ironmaking device for smelting reduction of carbon-containing iron oxide pellets (blocks). 2. Background technology: [0002] At present, the blast furnace is still the main force of ironmaking in the metallurgical industry. However, due to the long blast furnace process, high infrastructure costs, complex equipment, high energy consumption, poor environmental conditions, and non-renewable coke resources, people have to turn their attention to the development of new non-blast furnace refining Iron craft and ironmaking equipment. [0003] Coke-free and low pollution is the goal of the new non-blast furnace ironmaking process. The new smelting reduction ironmaking process in the world is basically divided into two types: one is the "one-step" smelting reduction ironmaking method that directly uses fine ore and non-coking coal smelting, such...

AI Technical Summary

Problems solved by technology

The design of the connected furnace solves the matching of the pre-reduction and final reduction production capacity, and there is no problem that the melting capacity of the COREX process is greater than the pre-reduction capacity, which is beneficial to the comprehensive utilization of energy and production organization, which can reduce consumption and save production costs

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