High density total oxygen short process high-efficiency cleaning iron-making process

Abstract

The invention relates to a high density total oxygen short process high-efficiency cleaning iron-making process. The high density total oxygen short process high-efficiency cleaning iron-making process mainly comprises the following steps: S1, uniformly mixing wide-grained iron ore powder, anthracite powder and slaked lime powder and then granulating; S2, putting the wide-grained carbon-containingpellet obtained in S1 into a rotary kiln for carrying out deep self-reduction; S3, dedusting, cooling and carrying out CO2 removal treatment on exhaust gas of the rotary kiln to obtain upgrading coalgas, and introducing the upgraded coal gas into the rotary kiln again for secondary combustion; S4, carrying out hot charging on the wide-grained metallized pellet obtained in S2 into a melting gasifier and carrying out final reduction melting; S5, respectively discharging slag and molten iron from the corresponding cinder notch and iron notch. The comprehensive energy consumption of the processis reduced by 30 percent compared with a traditional blast furnace process, the coal powder burnout ratio is greater than or equal to 90 percent, the concentration of reduction components is greater than or equal to 90 percent and the CO2 removal rate of the coal gas is greater than or equal to 90 percent; the coking, sintering and pelletizing procedures which have the maximum pollution emission of iron steel enterprises are eliminated, so that energy consumption and pollutant emission are reduced from the source.

Description

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AI Technical Summary

Benefits of technology

This patented method uses fine grain ores instead of regular ones, saving on both materials while also improving efficiency during reduction operations such as smelting and rocketry (firing). Additionally, this new technique reduces power usage and carbon dioxide emission levels through direct use of reduced gases produced by burning charcoal rather than fossil fuel sources like natural gas. Overall, these technical improvements result in improved economic performance and environmental benefits over existing methods

Problems solved by technology

This patents describes different methods used during the manufacturing of metallic materials such as castings from metal scraps produced through various industries like foundry operations. These techniques involve converting waste plates containing valuable components onto new ones without generating harmful substances called slagging fines. Additionally, these technical problem addressed in this patented text rels to developing an effective way to recycle unused residual carbon sources while minimizing impact upon global environment issues associated with current disposal practice.

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