An anti-escaping system and control method for blowing hood gas

Abstract

The invention discloses a blowing hood gas escape prevention system and a control method thereof, comprising: a blowing hood located on the top of a sintering machine trolley; a blowing pipe row arranged inside the blowing hood and located on the sintering machine table The top of the car is used to spray combustible gas to the sintering material surface of the sintering machine trolley; the gas pipeline is used to transport combustible gas to the blowing pipe row; it is characterized in that it also includes: an air flow device, including a driving cylinder and A rotating impeller device, the rotating impeller device is arranged at the top area of ​​the blowing hood, and the rotating impeller device is used to drive the external air to generate an airflow and input the generated airflow from the top of the blowing hood downward into the spraying hood. Inside the hood, a wind pressure zone area is formed at the position above the row of blowing pipes so that the combustible gas cannot pass upwards. The anti-escape system can basically eliminate the phenomenon of gas escape, and helps to inhale the air outside the hood, so as to achieve the purpose of stable, smooth and high-quality production of the sintering production line.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an anti-escape system used to prevent injected gas from leaking from an injection hood during the production process of sintered ore. The invention also relates to a method for controlling the operation of said escape prevention system. Background technique [0002] The sintering process is a key link in the ironmaking process. Its principle is to mix various powdery iron-containing raw materials with an appropriate amount of fuel and flux, add an appropriate amount of water, mix and pelletize the material on the sintering equipment to make the material A series of physical and chemical changes, sintered into blocks, which are sent to the blast furnace for the next step. [0003] In order to reduce the coke ratio and smelting cost of blast furnace ironmaking, blast furnaces often require high strength and high reducibility for sinter. In the sintering process, the sintered o...

AI Technical Summary

Problems solved by technology

[0007] On the other hand, it is more difficult to inhale the air in the hood

Due to the static airfoil anti-escape plate seal, most of the area of ​​the material surface is covered by the airfoil, so that the negative pressure on the material surface is greatly limited in the attraction of the air outside the hood, and it is difficult for the air outside the hood to be sucked into the hood Into the material layer, which has a negative impact on the sintering effect

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