Waste steel heating furnace

Abstract

The invention relates to a waste steel heating furnace. The waste steel heating furnace comprises a furnace body and a split type flap valve arranged at the bottom of the furnace body, the upper partof the furnace body communicates with the lower part of the furnace body, a plurality of layers of combustors are arranged on the two side surfaces of the furnace body, and each combustor communicateswith an air annular pipeline and a coal gas annular pipeline; an automatic ignition hole is formed in the lower portion of each combustor, the combustors are provided with protective caps, and the protective caps are located above the automatic ignition holes; the automatic ignition holes are flush with the inner wall of the furnace body, protective cap shells extend into the furnace body, and the tops of the protective caps are bent downwards and are in an arc transition; the included angle alpha between the inclined furnace wall at the upper end of each protective cap and the horizontal direction is 30-60 degrees, the inner wall of the bottom of the furnace body is parallel to the vertical direction or is inclined to a certain angle towards the inside of the furnace body, and the inclination angle beta is 0-45 degrees; and the two side surfaces of the furnace body are provided with reinforcing ribs which are distributed in a cross-shaped manner, and the combustors are located at thecross-shaped intersection points of the reinforcing ribs. The waste steel heating furnace is uniform in heating, high in efficiency, small in pollution and high in safety, so that the wear rate of the combustors is reduced, and the service life of the combustors is prolonged.

Description

technical field

[0001] The invention belongs to the technical field of scrap steel baking, in particular to a scrap steel heating furnace. Background technique

[0002] In iron and steel production, in order to save energy and reduce consumption, it is usually necessary to preheat scrap steel. In terms of economic benefits, on the one hand, heating scrap steel can greatly reduce the energy consumption of the converter. The reduction of production and maintenance costs, the increase of output, and the improvement of steel quality all contribute to different degrees, and the comprehensive economic benefits are huge.

[0003] The existing steel scrap heating furnace has small loading capacity, uneven heating, low gas utilization rate, serious material leakage, and severe impact from falling scrap steel, high burner nozzle wear rate, and easy deformation of the furnace body. The feeding and discharging of the heating furnace share a material opening. When unloading, the crane ...

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