Gas burner and metal smelting furnace

Abstract

The invention provides a gas burner and a metal smelting furnace. The gas burner comprises a hollow burner body, the burner body is tubular, one end of the burner body is provided with a burner head, the burner body is provided with a gas inlet, a gas spray hole and an air inlet hole, and the gas inlet comprises a normal-pressure gas inlet and a high-pressure gas inlet. The burner head and the high-pressure gas inlet are oppositely arranged and located at the two ends of the burner body respectively, the pressure of the high-pressure gas inlet ranges from 0.05 MPa to 0.4 MPa, in the temperature rising stage, flowing of gas in the furnace is accelerated, the temperature rising speed in the furnace is remarkably increased, the furnace temperature is more uniform, and in the heat preservation and heating stage, namely when the temperature in the furnace reaches 700 DEG C or above, high-pressure fuel gas is intermittently injected, gas flow in the furnace is accelerated, high-temperature gas mass is dispersed and the furnace temperature is uniform, the air-fuel ratio is reduced by the high-pressure fuel gas, the oxidation burning loss of metal is reduced, the waste gas amount is also reduced, the energy is saved, the environment is protected, the heating and smelting efficiency is improved, and the production cost is reduced.

Description

Technical field [0001] The present invention relates to the field of metal smelting furnaces, and more particularly to a gas burner and a metal smelting furnace. Background technique [0002] The existing metal smelting furnace burner is typically fixed pressure burner. When installed, multi-vault reflective mounting is used, and the heating heating heating of the furnace is mainly relying in the reflection of the furnace in the furnace. [0003] The main defect is: [0004] (1) When the metal smelting furnace size is large, in particular, the long-term proportion is too large, and it is easy to form a local high temperature zone in the tail of the flame, not only in the region, but also the metal in the region also increases its oxidation. The amount of burning, while increasing production costs, emissions exhaust gas also caused pollution to the atmosphere. [0005] (2) When the smelting furnace size is large, increase the burner load, and the heating time cannot be significant...

AI Technical Summary

Problems solved by technology

[0004] (1) When the size of the metal smelting furnace is large, especially if the length-to-height ratio is too large, it is easy to form a local high-temperature zone at the tail of the flame, which will not only produce nitrogen oxides in this area, but also increase the oxidation of metals in this area The amount of burning loss increases the production cost and at the same time, the exhaust gas also pollutes the atmosphere

[0005] (2) When the size of the smelting furnace is large, increasing the burner load cannot significantly reduce the heating time; while increasing the gas consumption per unit of metal, the production capacity is low, which is not conducive to large-scale centralized production

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