Pulse-combustion heat accumulating type metal magnesium reduction furnace

Abstract

The invention relates to a pulse-combustion heat accumulating type metal magnesium reduction furnace, and belongs to the technical field of non-ferrous metals. The pulse-combustion heat accumulating type metal magnesium reduction furnace comprises a furnace top, a furnace body, a reduction tank, heat accumulating type burners, a flue gas pipeline, an air pipeline and a gas pipeline; and the conventional continuous-combustion control system is replaced by a pulse-combustion heat accumulating type system, and 3 to 4 layers of heat accumulating type burners are arranged on the single-side furnace wall uniformly along the direction of furnace length. The pulse-combustion heat accumulating type metal magnesium reduction furnace has the advantages that by applying the pulse-combustion control technology, the load adjustment ratio of the burners is improved, the spouting velocity of flue gas is stabilized, the heat transfer efficiency is improved, and the accurate control of combustion atmosphere is realized; a combustor is arranged along the direction of hearth length, combustion gas forms U-shaped flame along the direction of furnace width, convection heat transfer in the hearth is increased, the uniformity of a temperature field is strengthened, the consumption of fuel is reduced, and the service life of the reduction tank is prolonged; and the heat accumulating type combustion technology is applied and the flue gas entrainment effect generated by the siphon principle is utilized, the waste heat of the flue gas is utilized fully, energy is saved farthest, and the discharge of pollutants is reduced.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a pulse combustion regenerative type metal magnesium reduction furnace, a vertical tank reduction furnace for extracting magnesium by a regenerative high temperature reduction method using pulse combustion control technology. Background technique [0002] The domestic magnesium reduction furnace generally adopts the form of continuous combustion control. In this mode, the adjustment ratio of the burner is generally about 1:4. The shape and thermal efficiency can reach the best design state; but when the reduction furnace is in the heat preservation condition, the flow rate of the burner is close to its minimum flow rate, the heat load is the smallest, the gas flow rate is greatly reduced, and the flame length does not meet the requirements, resulting in The furnace temperature is obviously lower than the furnace temperature at both ends, which cann...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a pulse combustion regenerative metal magnesium reduction furnace, which solves the defects of the existing vertical tank metal magnesium reduction furnace, applies pulse combustion control technology, improves the load adjustment ratio of the burner, and stabilizes the gas injection speed , improve heat transfer efficiency, and achieve precise control of the combustion atmosphere; burners are arranged along the length of the furnace, and the combustion gas forms a U-shaped flame along the width of the furnace, increasing convective heat transfer in the furnace, strengthening the uniformity of the temperature field, and reducing fuel consumption. Consumption, and improve the service life of the reduction tank; apply regenerative combustion technology and use the flue gas entrainment effect generated by the siphon principle, make full use of the waste heat of the flue gas, save energy to the greatest extent, and reduce pollutant emissions

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