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Online determination method of damage condition of refractory material lining

A technology for refractory materials and breakage, which is applied in the field of ironmaking blast furnace process system maintenance, and can solve problems such as burnout, explosion, and economic loss of the blast furnace system

Inactive Publication Date: 2016-04-06
QINGDAO WEIYE FORGING & STAMPING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Eventually, the blast furnace system will burn out and even explode and other vicious accidents
In recent years, similar accidents have been reported continuously, and blast furnaces have been shut down unplanned, causing huge economic losses and adverse social impacts on enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: The temperature of the furnace shell in the 3# hot blast outlet area of ​​the 1# blast furnace rises, and 6 compressed air pipes are installed to cool it. At the end of the air supply of the hot blast furnace, the furnace shell temperature reaches about 220°C; when the furnace is cut off, the furnace shell temperature is 140°C about. During the 10-hour routine maintenance of the blast furnace, apply the technical method of the present invention, gradually turn off the air source of the cooling device 40 minutes before the blast furnace shutdown, and monitor the temperature change of the furnace shell with an infrared temperature measuring gun. After 10 minutes, the temperature of the furnace shell reaches the maximum value 385°C, the average rate of rise is 35°C / min. It is judged that cross air pores appear in the refractory lining in the furnace shell, and the damaged lining in this area is maintained by beating with a screw pump. Weld two grouting holes, a...

Embodiment 2

[0015] Example 2: The temperature of the furnace shell in the 3# hot air outlet area of ​​the 2# blast furnace rises, and 4 net ring water pipes are set up for cooling, and the flow rate is 2~3t / h. At the end of the air supply period of the hot blast stove, the temperature of the furnace shell is about 85°C; when the furnace is cut off, the temperature of the furnace shell is about 35°C. During the 24-hour routine maintenance of the blast furnace, the technical method of the present invention is applied, and the cooling water source is gradually turned off 45 minutes before the blast furnace is shut down, and the temperature change of the furnace shell is monitored with an infrared temperature measuring gun. After 4 minutes, the furnace shell turns dark red, and the temperature reaches 850°C, the average rate of rise is 195°C / min. It was judged that the refractory lining in the furnace shell collapsed and was severely damaged. It should be maintained by on-site excavation or ...

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PUM

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Abstract

A tool needed by an online determination method of the damage condition of a refractory material lining comprises an infrared temperature measurement probe, a rubber tube, a seamless tube, a compressed wind source and a purified circulating water source. The method comprises the following steps: arranging a cooling device, controlling temperature monitoring data, and discriminating the damage of the refractory material lining of a blast furnace system to accurately and effectively determine the damage condition of the refractory material lining. The method provides sufficient technical basis for blast furnace planning unkeeping and making of reasonable construction maintaining schemes, and ensures safe and long-time running of a high wind temperature blast furnace system.

Description

technical field [0001] The invention belongs to the technical field of ironmaking blast furnace process system maintenance, and in particular relates to an online judgment method for the damage state of a refractory lining. Background technique [0002] With the continuous advancement of blast furnace smelting technology, the long-life hot blast stove process system that can provide a blast temperature above 1200°C is an important technical means for blast furnace ironmaking to achieve large coal injection, coke ratio reduction, and cost reduction. Important technical guarantee for low consumption, longevity and environmental protection. [0003] In recent years, no matter whether the domestic ironmaking blast furnace adopts the improved internal combustion hot blast stove, external combustion hot blast stove process system or top combustion hot blast stove process system, under the condition of purely burning blast furnace gas, the hot blast temperature is ≥ 1200 ℃, but Th...

Claims

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Application Information

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IPC IPC(8): C21B7/24
Inventor 张磊
Owner QINGDAO WEIYE FORGING & STAMPING MACHINERY CO LTD
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