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Method for district cooling of blast furnace during blast furnace dissection

A zone cooling and blast furnace technology, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as potential safety hazards, imperfect research, and huge cost of manpower and material resources, and achieve the effect of avoiding fragmentation

Inactive Publication Date: 2010-06-23
SHANDONG IRON & STEEL CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, cooling the blast furnace by pumping water from the top of the furnace may mislead scientific researchers to carry out blast furnace anatomy and subsequent scientific research work
The second is to inject liquid nitrogen from the top of the blast furnace. This method has the advantage of rapid cooling, but it requires huge manpower and material resources, and there are certain safety hazards. The research on this at home and abroad is not perfect.
[0009] The above-mentioned patent application documents disclose the method of structural modification or water cooling of a certain part of the blast furnace under normal production conditions, but it does not mention the reasonable cooling of the blast furnace before the blast furnace is dissected.

Method used

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  • Method for district cooling of blast furnace during blast furnace dissection
  • Method for district cooling of blast furnace during blast furnace dissection
  • Method for district cooling of blast furnace during blast furnace dissection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method to cool the blast furnace in sections during dissection, such as Figure 1-2 As shown, the steps are as follows:

[0037] (10) Calibration of zone cooling baseline:

[0038] Predict the temperature distribution of the blast furnace charge based on the data of the temperature probe on the blast furnace, and then predict the boundary line between the solid charge and the melted and softened charge based on the temperature distribution, and mark the blast furnace shell at a position about one meter above the boundary line As the baseline for zoned cooling blast furnaces;

[0039] (11) Drill the cooling medium injection port on the reference line:

[0040] Shut down the furnace, release the high-pressure gas remaining in the blast furnace from the top of the furnace, and detect the residual amount of gas after suitable operation. Drill a hole on the reference line of the zoned cooling blast furnace. The diameter of the hole is 200mm; the depth is to drill through the blas...

Embodiment 2

[0050] Same as Example 1, except that the diameter of the cooling medium injection port is 150mm; the depth is based on drilling through the blast furnace wall; the number is 11; the water speed of the cooling medium injection port is 12m / s, and the pressure of the cooling water is : 1.8MPa.

Embodiment 3

[0052] Same as Example 1, except that the diameter of the cooling medium injection port is 120mm; the depth is subject to drilling through the blast furnace wall; the number is 10; the water speed of the cooling medium injection port is 15m / s, and the pressure of the cooling water is : 2MPa.

[0053] The above-mentioned embodiment of the present invention is used for zone cooling of a 100 cubic meter blast furnace during dissection.

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Abstract

The invention provides a method for district cooling of a blast furnace during blast furnace dissection, belonging to the technical field of ironmaking. The method comprises the following steps: calibrating a district cooling datum line; drilling a cooling medium filling opening on the datum line; estimating the heat produced in unit time after the blast furnace blows out as well as cooling water flow required in cooling the blast furnace; carrying out district cooling; and finishing district cooling. Compared with the background technology, the method combines a blast furnace smelting technology with the need of blast furnace dissection to formulate a special blast furnace cooling method during blast furnace dissection, thus the method can truly keep information in the blast furnace smelting process, and is favourable for knowing the furnace burden distribution state, the furnace burden granularity variation, the furnace burden reducing process, the slag and molten iron distribution state, chemical element distribution state and the like in the blast furnace smelting process.

Description

Technical field [0001] The invention relates to a method for cooling a blast furnace in sections during dissection of a blast furnace, and belongs to the technical field of ironmaking. Background technique [0002] Blast furnace smelting pig iron is an important part of the metallurgical industry. It involves high-temperature solid, liquid and gas phases, and various complex chemical reactions and physical changes occur. However, it is difficult to observe and study the inside of the blast furnace in the actual smelting process, and it is also difficult to carry out Laboratory research. Dissecting the blast furnace by shutting down and destructively dismantling the furnace is an effective method for studying blast furnaces. There is little research work on blast furnace anatomy in China, especially the research on large blast furnace anatomy is still in its infancy. Blast furnace anatomy research requires huge manpower, material resources, and financial resources. For a specifi...

Claims

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Application Information

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IPC IPC(8): C21B7/00
Inventor 曾晖程树森郭怀功潘宏伟王子金赵宏博周小辉
Owner SHANDONG IRON & STEEL CO LTD
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