Fast change method of large-scale converter movable gas hood

Abstract

The invention relates to the field of exhaust or separation devices of gas or smoke dusts in converters for processing and treating pig irons and discloses a fast change method of a large-scale converter movable gas hood. After a fixed gas hood is disassembled, the method sequentially comprises the following steps of: firstly, disassembling a cooling water pipe and rocking a converter (1) until the furnace bottom is arranged upwards; secondly, fixing a movable gas hood (2) on the converter (1) through a chain fall (4); thirdly, hoisting the movable gas hood (2) down through a crane (3); fourthly, hoisting a new movable gas hood onto the furnace bottom of the converter (1) through the crane (3) and fixing the new movable gas hood through the chain fall (4); fifthly, rocking the converter (1) until the furnace bottom is arranged upwards; and sixthly, reassembling a lifting chain of a hoisting device of the movable gas hood (2) and removing the chain fall (4). The invention has the advantages of simple steps, convenient operation, short construction period, less influence to production and high production efficiency.

Description

Technical field [0001] The invention relates to the field of discharge or separation devices for waste gas or smoke in a converter used for processing pig iron, in particular to a method for quickly replacing a large converter movable hood. Background technique [0002] Converter steelmaking is a common method of smelting pig iron into steel, and converter steelmaking is carried out in the converter. When steelmaking, the converter is in a horizontal state at first, after injecting liquid pig iron and corresponding auxiliary materials, air or oxygen is blown, and the converter is turned to make it upright, at this time the steelmaking reaction occurs in the converter. When the steelmaking reaction is about to complete, the blast is stopped and the converter is turned back to a horizontal position, and the molten steel is poured from the converter to the ladle to complete the steelmaking process. During steelmaking, a large amount of exhaust gas and smoke will be discharged from ...

AI Technical Summary

Problems solved by technology

There are three problems in this dismantling method: 1. Due to the large diameter of the movable hood and the narrow space above the converter, the steel structure platform or girder that may be encountered during the hoisting process has to be destructed before hoisting. After the fume hood is reinstalled, there are many structures that need to be restored, and the construction cost is high; 2. After the movable fume hood is hoisted, the angle needs to be changed to pass through the converter plant structure. It is difficult to adjust the angle and there are many safety hazards; 3. The hoisting process is very difficult. The construction period is long and the converter shutdown time is long

reduced productivity

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