Novel hydrogen-carbon smelting reduction ironmaking process

Abstract

The invention relates to a novel hydrogen-carbon smelting reduction ironmaking process which comprises the steps of preheating and prereduction of iron ore powder, smelting, slag and iron separation, hydrogen preheating and coal gas reforming. The novel hydrogen-carbon smelting reduction ironmaking process is characterized in that after the iron ore powder is preheated and prereduced, hydrogen and coal are used as reducing agents in the final reduction process and iron ores are subjected to final reduction in a smelting reduction mode; the slag and iron separation of molten liquid iron and molten slags is implemented in a siphon mode; high temperature gas exhausted from a final reduction furnace is subjected to reforming, gas making by coal gas, dust removal and temperature reduction and is subjected to pressure swing adsorption system processing after exchanging heat with the hydrogen; and heat required by the complete process is provided by the oxygen-coal combustion and the secondary combustion of reduction gas. Compared with the existing process, the process has the advantage that the CO2 discharge is reduced by about 10 percent.

Description

technical field [0001] The invention relates to a new hydrogen-carbon smelting reduction ironmaking process, which belongs to the technical field of non-blast furnace ironmaking. Background technique [0002] The traditional blast furnace ironmaking process uses coke as a direct reducing agent, which consumes a lot of heat; the exhaust gas emitted during the coking and sintering process in the blast furnace ironmaking process accounts for a high proportion of the total pollution to the environment. Therefore, a smelting reduction ironmaking process is proposed for the problems of raw materials, waste gas pollution and energy consumption. The traditional smelting reduction process (COREX, HISMELT, etc.) uses carbon as the reducing agent and heating agent at the same time, which reduces the energy utilization rate and makes the energy consumption higher. The smelting reduction process requires the use of more efficient and energy-saving reducing agents. As a clean energy sou...

AI Technical Summary

Problems solved by technology

The traditional smelting reduction process (COREX, HISMELT, etc.) uses carbon as the reducing agent and heating agent at the same time, which reduces the energy utilization rate and makes the energy consumption higher.

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