Energy-saving efficient reduction shaft furnace

Abstract

The invention discloses an reduction shaft furnace. The reduction shaft furnace comprises a furnace body, a distribution tray, a blanking tray, a distribution insertion plate, a blanking insertion plate, a heating furnace and a bracket, wherein the furnace body comprises a furnace reduction outer wall, a furnace cooling outer wall and a furnace cooling inner wall; the furnace cooling inner wall is connected with the furnace inner wall; the furnace reduction outer wall and the furnace cooling outer wall are connected and fixed with the bracket; a discharge baffle plate I is arranged between the furnace reduction outer wall and the furnace inner wall, and a sealing ring I is arranged between the furnace reduction outer wall and the furnace heating outer wall; a reducing gas heating device is arranged between the furnace reduction outer wall and the furnace cooling outer wall; the reducing gas heating device comprises a heat insulation layer, a repair brick and a reducing gas heating ring; a reducing gas distribution bag is communicated with the reducing gas heating device; the furnace cooling outer wall is connected with a blocking ring through a discharge baffle plate II and a sealing ring II, and the blocking ring is provided with an annular discharge sealed valve; and one end of an air flue is communicated with the furnace inner wall, and the other end of the air flue is communicated with a draft fan. The reduction shaft furnace has simple structure, low manufacturing cost and high efficiency, and saves energy.

Description

technical field [0001] The invention relates to a production equipment for reducing sponge iron, in particular to a reduction shaft furnace. Background technique [0002] At present, there are mainly two types of sponge iron production: rotary kiln and tunnel kiln, but both have the problems of long reduction time and strict requirements on raw materials and fuels, which lead to high production costs, and both have the problem that the remaining tail gas after reduction is directly discharged into the atmosphere In this process, it cannot be fully utilized, energy is wasted, and the utilization rate of equipment is low; coal-fired heating not only takes a long time to restore, but also consumes a lot of coal. Usually, 1.5 tons of coal is needed to restore 1 ton of sponge iron, and a cycle takes about 48 hours. Left and right, thus resulting in high production costs and low yields; in addition, both of them have carbon monoxide gas in the tail gas generated after reduction, w...

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Problems solved by technology

[0002] At present, there are mainly two types of sponge iron production: rotary kiln and tunnel kiln, but both have the problems of long reduction time and strict requirements on raw materials and fuels, which lead to high production costs, and both have the problem that the remaining tail gas after reduction is directly discharged into the atmosphere In this process, it cannot be fully utilized, energy is wasted, and the utilization rate of equipment is low; coal-fired heating not only takes a long time to restore, but also consumes a lot of coal. Usually, 1.5 tons of coal is needed to restore 1 ton of sponge iron, and a cycle takes about 48 hours. left and right, resulting in high production costs and low output; in addition, both of them have carbon monoxide gas in the tail gas generated after reduction, which is discharged into the atmosphere, polluting the environment and wasting energy

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