Negative-pressure ignition control device for sintering iron ore

Abstract

The invention discloses a subpressure ignition control device which is hard to loss effect and is used for sintering an iron ore. The device includes an air box body, the vertical tube of the air box connected on the body of the air box as well as a large flue and a by-pass pipe connecting the vertical tube of the air box and the large flue; a clapboard is arranged in an access between the vertical tube of the air box and the by-pass pipe; the clapboard is fixed on the inner wall of the access so as to lead an air flow to pass through from the lower part of the access. A bending tube provided with the clapboard is connected between the air box and the by-pass pipe to lead the air box to have the function of dust removing and lead a bulk to be deposited at the bottom part of the bending tube and to be incapable of entering the by-pass tube, thus avoiding the by-pass tube from plugging; an electric flap the opening of which can be controlled is arranged in the by-pass tube to control the subpressure of the lower surface of an ignition air box; the bottom part of the bending tube is provided with a double-layer ash discharge valve which is convenient for cleaning sediments. The subpressure ignition control device of the invention can flexibly and effectively control the subpressure of the ignition air box and the subpressure of a hearth, maintain the normal running of the sintering process, save the energy consumption for ignition and is applicable for the ignition and sintering of a sintering machine by a v-ti magnetite concentrate ore in particular.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a negative pressure ignition control device for iron ore sintering. Background technique [0002] The requirements for ignition of iron ore sintering are: certain ignition temperature; certain ignition time; certain ignition depth; uniform horizontal ignition. Negative ignition pressure determines the success of these requirements. The higher the ignition negative pressure, the greater the ignition draft, the ignition heat is quickly drawn away, and the surface ignition intensity is insufficient. The lower the ignition negative pressure is, the positive pressure is formed in the ignition furnace, and the flame is sprayed out of the furnace, and the combustion air volume of the solid fuel on the surface of the mixture is insufficient due to lack of suction, which also affects the ignition effect. Therefore the key of ignition control device is to control ignition negative p...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the disadvantage that the existing negative pressure ignition control device is easily blocked by bulk materials, the technical problem to be solved by the present invention is to provide a negative pressure ignition control device for iron ore sintering that prevents the accumulation of bulk materials and is not easy to fail

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