Equipment and method for solving blast furnace alkali metal furnace wall nodulation and furnace charge surface dewing

Abstract

The invention discloses equipment and method for solving blast furnace alkali metal furnace wall nodulation and furnace charge surface dewing. The equipment comprises a blast furnace body, the blast furnace body comprises a furnace body high-temperature area and a furnace body medium-low-temperature area, a furnace gas outlet pipe is arranged on the side wall of the furnace body medium-low-temperature area, a gas return pipe is arranged on the side wall of the furnace body high-temperature area, alkali metal removing equipment is arranged between the furnace gas outlet pipe and the gas return pipe, and a condensation pipe is arranged in the equipment. During operation, blast furnace gas runs in a blast furnace from bottom to top, part of the blast furnace gas is led out through the furnace gas outlet pipe, gaseous alkali metal compounds are condensed and removed through the condensation pipe in the alkali metal removing equipment, the furnace gas with alkali metal removed is obtained and returns into the furnace to participate in metallurgical reaction, when the system resistance of the blast furnace is normal, the alkali metal removal operation is stopped, when the system resistance of the blast furnace exceeds a normal value, alkali metal removal operation is started, and it is guaranteed that no alkali metal compound nodules exist in the furnace. According to the equipment process, the reaction activity and air permeability of furnace charge are greatly improved, no nodulation phenomenon is generated, and the blast furnace resistance and energy consumption are remarkably reduced.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a device and a method for solving nodulation on the wall of an alkali metal blast furnace and dew condensation on the surface of a charge of a blast furnace. Background technique [0002] Blast furnace alkali metal compound nodulation is a problem that has existed since the blast furnace. It deteriorates the air permeability of the blast furnace, affects the smooth flow of blast furnace smelting, and is the biggest obstacle to the longevity of the blast furnace. The furnace charge always contains a certain amount of alkali metal compounds. Especially in recent years, the proportion of imported ore has increased, and the content of alkali metal in blast furnace charge has also increased sharply. Due to the complexity of the environment in the blast furnace, the diversity of alkali metal compounds in the blast furnace changes, and different compounds are formed in different ar...

AI Technical Summary

Problems solved by technology

Condensation of different substances occurs in different areas, resulting in poor reactivity on the surface of the furnace charge; the bonding of the furnace charge to each other results in poor air permeability of the furnace charge, increased operating energy consumption, and reduced smelting efficiency; low furnace wall temperature is prone to nodules, resulting in The increase of the downward resistance of the material affects the smooth operation of the blast furnace; when cleaning the alkali metal nodules, it is easy to damage the refractory material of the furnace wall, which affects the longevity of the blast furnace

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