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Fast change method of large-scale converter movable gas hood

A technology of movable hood and replacement method, which is applied in the direction of manufacturing converters, improving process efficiency, and improving energy efficiency. It can solve the problems of difficult adjustment angle, high construction cost, and long construction period, so as to improve operation safety. , to ensure the construction quality and shorten the construction period

Inactive Publication Date: 2010-10-06
SHANGHAI BAOYE GRP CORP
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  • Abstract
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  • Claims
  • Application Information

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

Method used

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  • Fast change method of large-scale converter movable gas hood
  • Fast change method of large-scale converter movable gas hood

Examples

Experimental program
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Effect test

Embodiment 1

[0017] There is a converter 1, and the movable hood 2 needs to be replaced, such as figure 1 Shown. Follow the steps below in sequence:

[0018] a. Remove the fixed hood;

[0019] b. Remove the cooling water pipe of the movable fume hood 2, and shake the converter 1 until the bottom of the furnace is up;

[0020] c. Loosen the lifting chain of the lifting device of the movable fume hood 2, drop the movable fume hood 2 on the bottom of the furnace, and use the inverted chain 4 to fix the movable fume hood 2 on the converter 1. The inverted chain 4 used has a different lifting weight Less than 10 tons, this embodiment adopts a rewind chain with a lifting weight of 10 tons;

[0021] d. Then shake the converter 1 toward the front of the furnace, and swing the movable fume hood 2 to the position of the platform 12 in front of the converter. The platform 12 is 9.6 meters square, and the movable fume hood 2 is hoisted down with a crane 3;

[0022] e. Use the crane 3 to hoist the new movable...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/40
CPCY02P10/25
Inventor 向鑫
Owner SHANGHAI BAOYE GRP CORP
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