Connecting structure for electric furnace charging duct and electric furnace and electric furnace system

Abstract

The invention discloses a connecting structure for an electric furnace charging duct and an electric furnace and an electric furnace system. The electric furnace charging duct comprises a charging chute and a gas hood and is connected with a dust removing interface of the electric furnace; an adjustable tuyere is arranged at the connected part of the gas hood and the dust removing interface; and the gas hood is provided with an adjusting mechanism for adjusting the opening degree of the adjustable tuyere. According to the electric furnace charging duct disclosed by the invention, the adjustingmechanism for the adjustable tuyere can adjust the opening degree of the adjustable tuyere and controls the mixing amount of cold air or completely closes the cold air, so that the opening degree ofa connecting throat between the charging duct formed by the gas hood and the charging chute and the electric furnace is adjusted. Therefore, the air amount mixed into the duct can be controlled, and further carbon monoxide in flue gases in the electric furnace is sufficiently combusted; as an air mixing point is located at the foremost end of the dust, the carbon monoxide has sufficient combustiontime; and in addition, a preheated duct is longer, so that the preheating effect of scrape steel in the duct is improved.

Description

technical field [0001] The invention belongs to the technical field of electric furnace steelmaking, in particular to a connection structure of an electric furnace feeding duct and an electric furnace and an electric furnace system. Background technique [0002] Chinese patent 2014101965651 discloses an electric furnace charging flue and furnace body sealing device. During the specific implementation process, it was found that when the C-type movable sealing plate retreats, due to the natural rising characteristic of hot flue gas, there will be a large amount of smoke in the upper gap. Breathing out, affecting the production environment. In addition, because the dust removal throat cannot be adjusted, the system cannot inhale enough air to combust the carbon monoxide in the flue gas when the mixed air is required to burn the carbon monoxide in the flue gas, which causes the carbon monoxide combustion point to move backward, and the thermal energy of its combustion preheats t...

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Problems solved by technology

[0002] Chinese patent 2014101965651 discloses an electric furnace feeding flue and furnace body sealing device. During the specific implementation process, it was found that when the C-shaped movable sealing plate retreats, due to the natural rising characteristics of the hot flue gas, there will be a large amount of smoke in the upper gap. Gas rises, affecting the production environment

In addition, due to the inability to adjust the dust removal throat, the system cannot inhale enough air to burn the carbon monoxide in the flue gas when mixed air is needed to burn the carbon monoxide in the flue gas, which causes the combustion point of carbon monoxide to move backward, and the heat energy of its combustion will preheat the scrap steel Reduced effect

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