Blast furnace iron mouth dedusting cover

Abstract

The invention discloses a blast furnace iron mouth dedusting cover comprising a dust collecting cover body (1), wherein an air suction opening (2) is formed in the top wall of the dust collecting cover body (1); a smoke guide plate (3) is horizontally arranged below the top wall of the dust collecting cover body (1) and is dead against the air suction opening (2); a transverse smoke dust passage (4) is formed between the smoke guide plate (3) and the top wall of the dust collecting cover body (1), and a longitudinal smoke dust passage (5) is formed between the smoke guide plate (3) and the side wall of the dust collecting cover body (1); the longitudinal smoke dust passage (5), the transverse smoke dust passage (4) and the air suction opening (2) are in fluid communication with one another in sequence; and the smoke dust at a blast furnace iron mouth can sequentially flow through the longitudinal smoke dust passage (5) and the transverse smoke dust passage (4) and then is discharged from the air suction opening (2) on the dust collecting cover body (1). The blast furnace iron mouth dedusting cover disclosed by the invention is convenient for formation of a venturi effect and can accelerate the speed of sucking away smoke dust, so that the smoke dust can be sucked more quickly and cleanly.

Description

technical field [0001] The invention relates to a blast furnace iron-making dust removal system, in particular to a top suction dust hood with a smoke guide plate. Background technique [0002] Since the 1970s, iron-making blast furnaces have developed into large-scale, and the production operation of the iron casting yard has undergone fundamental changes. The surrounding environment has a wide range of influences. If no effective control measures are taken, it will not only pollute the environment, but also seriously hinder the operation and safety of the casting yard, and also pose a great threat to the normal operation of equipment and instruments. For example: when the large blast furnace is tapping and slag, the amount of soot emitted from the surface of the molten iron launder and the molten iron tank is about 400-700g per ton of molten iron, and the dust concentration of the flue gas is 150-1500mg / m2 3 between; SiO in the soot during tapping 2 The content is about...

AI Technical Summary

Problems solved by technology

However, most of the above-mentioned dust removal methods have the following disadvantages: the dust removal cover of the top suction dust removal is placed on the upper part of the iron mouth. High, affecting the dust removal effect; especially at the edge of the dust removal hood, a large amount of dust-laden smoke will diffuse out, and due to the influence of the equipment in front of the furnace, it is impossible to improve the dust removal effect by reducing the dust removal hood or increasing the dust removal hood

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