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A kind of oven method of top-bottom double blowing converter

A technology of top-bottom re-blowing and oven method, applied in the direction of manufacturing converters, etc., can solve the problems of insufficient coke combustion, poor furnace bottom baking effect, furnace leakage accidents, etc., to achieve furnace body safety and improve furnace body safety. Maintenance effect, effect of improving oven quality

Active Publication Date: 2016-09-07
SHANDONG IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of insufficient coke combustion, poor furnace bottom baking effect, and prone to furnace shell penetration and furnace leakage accidents in the existing converter baking technology, the present invention provides a method for baking a converter with combined top and bottom blowing. Applied when opening a new top-bottom combined blowing converter

Method used

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  • A kind of oven method of top-bottom double blowing converter

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Embodiment 1

[0030] Example 1: 120t top-bottom combined blowing converter, when opening a new furnace, the following method is used for drying.

[0031] The oven method of the top and bottom combined blowing converter, the steps are as follows:

[0032] 1. Preparation of raw materials. 10 tons of ordinary coke for ironmaking, one empty steel hopper, 500 kilograms of wood, and two long oxygen blowing pipes. Among them, 10 tons of coke is divided into two parts: 7 tons of coke is transported from the ground material warehouse to the upper converter high-level silo for process use, and 3 tons of coke is loaded into the scrap hopper.

[0033] 2. Ignite the coke in the scrap hopper in advance. Two hours before the oven, the coke in the waste steel hopper is ignited by firewood, and the combustion is supported by two oxygen blowing pipes. The coke is fully burned with oxygen in the waste steel hopper for 2 hours and then added to the converter.

[0034] 3. Medium heat baking mode. The bottom blowing...

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Abstract

The invention relates to an oven baking method for a top-bottom combined blowing converter. Carbon coke enters a steel scrap hopper and a converter overhead bunker respectively; when an oven is baked so as to open a new converter, carbon coke in the steel scrap hopper is ignited in advance, and the oven is baked with medium fire firstly; during baking, the converter overhead bunker adds an appropriate amount of carbon coke in the converter every 4-5 minutes, and the baking time is controlled to be 50-60 minutes; the oven is baked with big fire, and during baking, an appropriate amount of carbon coke is added in the converter every 2 minutes; when the flame at the converter mouth becomes white after the carbon coke in the overhead bunker is added in the converter, the oxygen supply is closed by lifting an oxygen lance, and the oven baking is finished. According to the oven baking method for the converter, which is disclosed by the invention, the carbon coke is sufficiently combusted, the oven-bottom baking effect is good, and the phenomena that steel penetrates through converter shells and converter leakage accidents can be effectively avoided.

Description

Technical field [0001] The invention belongs to the field of converter steelmaking, and in particular relates to a furnace drying method when a top-bottom combined blowing converter opens a new furnace. Background technique [0002] In the process of opening a new furnace for the top and bottom combined blowing converter, the oven operation is very important. The 120t converter generally needs to prepare 3t coke, add it into the furnace with a scrap steel bucket, pour the ignition wood with diesel and ignite it, then add it to the furnace, and then supply oxygen to the oven. After the oven is completed, turn the oven down to observe whether there are cracks in the lining, brick-sucking phenomenon and coke remaining. [0003] At present, the top and bottom combined blowing converter furnaces of major steel plants adopt coke baking furnace lining. The coke is added into the furnace at one time, and the oxygen lance for steelmaking is used to blow oxygen to support the combustion bak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/35
Inventor 于亮涛沈彬彬温福新张佩王明杰兴明明王强胡增跃张海波高山邹春峰
Owner SHANDONG IRON & STEEL CO LTD
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