A blast furnace oven method

A furnace method and blast furnace technology, applied in the field of blast furnace metallurgy, can solve the problems affecting the life of the blast furnace and the poor effect of the blast furnace, and achieve the effects of promoting the longevity of the blast furnace, meeting the requirements for equipment use, and increasing the baking temperature

Active Publication Date: 2019-08-20
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of poor blast furnace baking effect and affecting the life of the blast furnace in the prior art, and provide a blast furnace baking method, which can effectively increase the actual baking temperature of the filler, and then improve the strength of the monolithic refractory and the overall baking effect of the blast furnace, and ultimately promote the longevity of the blast furnace

Method used

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  • A blast furnace oven method

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a kind of blast furnace oven method of the present embodiment is carried out according to the following steps:

[0036] Step 1. Install thermocouples for ovens at the center of the blast furnace bottom, above the blast furnace tuyere, and on both sides of the front end of the blast furnace, to monitor the temperature of the blast furnace oven in time, and adjust the subsequent oven process according to the real-time temperature; in production practice According to the detection requirements, thermocouple detection can be installed in multiple different positions of the blast furnace, which will not be detailed here;

[0037] Step 2: Pre-fill cooling water in the cooling channels of the furnace bottom of the blast furnace and the cooling channels of the cooling stave of the blast furnace respectively, and then close a plurality of cooling channels in the cooling wall at even intervals, and keep some cooling channels open; in this embodiment, ea...

Embodiment 2

[0043] A kind of blast furnace baking method of the present embodiment is basically the same as that of Embodiment 1, the difference is that in the step 3 in the present embodiment, the water flow rate in the cooling water channel that is kept open in the cooling wall is 35% of the normal circulation water flow rate, and the furnace The water flow in the bottom cooling pipe is 35% of the normal circulating water flow, and the water flow in the blast furnace tuyere small sleeve is 20% of the normal circulating water flow; in step 4, when the thermocouple detects that the temperature of the bosh cooling wall of the blast furnace reaches above 90°C , open all the cooling water channels in the cooling wall of the blast furnace to participate in the circulation, the water flow of each cooling water channel is 35% of the normal circulation water flow; after 24 hours, control the water flow of each cooling water channel to 45% of the normal circulation water flow, until the end of the...

Embodiment 3

[0046] A kind of blast furnace baking method of the present embodiment is basically the same as that of the embodiment 1, the difference is that in the step 3 in the present embodiment, the water flow rate in the cooling water channel opened in the cooling wall is 32% of the normal circulation water flow rate. The water flow in the bottom cooling pipe is 32% of the normal circulating water flow, and the water flow in the blast furnace tuyere small casing is 16% of the normal circulating water flow; in step 4, when the thermocouple detects that the temperature of the bosh cooling wall of the blast furnace reaches above 90°C , open all the cooling water channels in the cooling wall of the blast furnace to participate in the circulation, and the water flow of each cooling water channel is 32% of the normal circulating water flow; after 22 hours, the water flow of each cooling water channel is controlled to be 42% of the normal circulating water flow, until the end of the oven;

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Abstract

The invention discloses a blast furnace drying method, which belongs to the field of blast furnace metallurgy. The invention comprises the following steps: 1. installing thermocouples at the center of the blast furnace bottom, above the tuyere, and on both sides of the front end of the tuyere; Cooling water channel, keep part open; 3. Start the hot blast furnace system to vent hot air into the blast furnace to bake the furnace, and keep the open cooling water channel in the furnace bottom cooling pipe and cooling wall to circulate water; 4. When the thermocouple detects the blast furnace bosh When the cooling wall temperature reaches above 90°C, open all cooling water channels to participate in circulating water supply until the end of the oven. The invention overcomes the disadvantages of poor blast furnace baking effect and affecting the life of the blast furnace in the prior art, can increase the actual baking temperature of the filler, improve the strength of the monolithic refractory material and the overall baking effect of the blast furnace, and promote the longevity of the blast furnace.

Description

technical field [0001] The invention relates to the technical field of blast furnace metallurgy, and more specifically, relates to a blast furnace drying method. Background technique [0002] Newly built or overhauled blast furnaces or other thermal equipment in the metallurgical industry need to be baked before they are put into production to evaporate the moisture or resin in the refractory masonry of the furnace body and increase the consolidation strength of the refractory material to Prevent the rapid cooling and rapid heating that may occur after commissioning, causing major damage to the masonry. [0003] At present, for newly-built or overhauled blast furnaces, the hot blast furnace system is generally used to bake the furnace, and at the same time, the cooling equipment is cooled by water circulation. The water speed is about 0.5m / s, and the highest furnace temperature is generally 600°C. This kind of soft water closed circulation cooling system has high cooling in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00C21B7/10
Inventor 陈军王志堂赵淑文蒋裕聂长果
Owner MAANSHAN IRON & STEEL CO LTD
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