Blast furnace bottom water cooling pipes

By dividing the blast furnace bottom into zones and adjusting the diameter and cooling intensity of the water-cooling pipes, the problem of the inability to dynamically adjust the water-cooling structure in the existing technology was solved, achieving the effects of slowing down refractory erosion and extending the life of the hearth.

CN117925931BActive Publication Date: 2026-05-26CISDI ENGINEERING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CISDI ENGINEERING CO LTD
Filing Date
2024-01-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing water-cooled structure at the bottom of the blast furnace cannot dynamically adjust the cooling intensity according to the degree of erosion, resulting in a shortened hearth life and severe refractory erosion.

Method used

The water-cooled pipes are divided into three regions—outer ring, middle ring, and inner ring—according to their distance from the center of the blast furnace. The pipe diameter gradually decreases, and the cooling intensity gradually decreases, forming a pot-bottom-shaped erosion curve to enhance the cooling effect in the key areas of the hearth.

Benefits of technology

By dynamically adjusting the cooling intensity, refractory erosion is slowed down, the furnace hearth life is extended, and the furnace core temperature is increased, ensuring the active operation of the furnace hearth.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117925931B_ABST
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Abstract

This invention relates to a water-cooled pipe for the bottom of a blast furnace, belonging to the field of metallurgical industry. The water-cooled pipe (2) is arranged at the bottom of the blast furnace, divided into an inner ring region, a middle ring region, and an outer ring region from the inside out according to the distance from the center of the blast furnace. The diameter of the water-cooled pipe (2) in the inner ring region is smaller than that in the middle ring region, which is smaller than that in the outer ring region. The cooling intensity gradually decreases from the outside to the inside, forming a pot-bottom erosion curve (1) inside the blast furnace hearth, thereby increasing the core temperature of the blast furnace hearth. This invention can enhance the cooling of the elephant foot region of the hearth, slow down the erosion of the refractory material in the elephant foot region, reduce the diameter of the middle ring pipe, reduce the cooling area, and minimize the diameter of the inner ring pipe, resulting in the smallest cooling area. The cooling intensity gradually decreases from the outside to the inside, thus forming a pot-bottom erosion, while simultaneously increasing the core temperature, ensuring the hearth is active, and extending the hearth's lifespan.
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