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High conductive copper-steel composite cast cooling wall of blast furnace

A copper-steel composite and stave technology, applied in cooling devices and other directions, can solve the problems of limited service life of cast steel staves, insufficient cooling capacity, and difficulty in widespread promotion, and achieve comprehensive performance improvement, carbon content reduction, and heat elimination. The effect of resistance

Inactive Publication Date: 2005-03-23
孙健
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cast iron cooling stave is made of gray cast iron, alloy cast iron, ductile iron, etc. When used under long-term high temperature, due to cracks due to thermal fatigue, carburization of cooling water pipes, grain growth of pig iron, etc., the service life is low The cast steel stave is made of ordinary low-carbon steel, and there are integral casting type, cast-welding combination type, seamless steel pipe inlaid casting and other types. Its service life is improved compared with cast iron stave, but its cooling capacity is still insufficient. Correspondingly, the service life of the cast steel stave is limited; the material of the copper stave is copper, and copper has the highest thermal conductivity, which is about 10 times that of steel and cast iron, so the copper stave has good cooling capacity and a long service life , but it is expensive and difficult to widely promote

Method used

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  • High conductive copper-steel composite cast cooling wall of blast furnace
  • High conductive copper-steel composite cast cooling wall of blast furnace
  • High conductive copper-steel composite cast cooling wall of blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Figure 1, Figure 2, image 3 As shown, the inlaid and cast copper parts (2) are arranged in rows and columns, and are welded together with the water pipes (3) to form a heat conduction system with high thermal conductivity. (4) is inlaid cast refractory brick or refractory pound , the principle is as mentioned above. Other conventional structures are specifically designed according to the type of blast furnace. The composition of the stave body (1) micro-composite low-carbon steel is: wt%

[0036] Fe: 99.22~98.57% C: 0.15~0.25%

[0037] Si: 0.20~0.40% Mn: 0.30~0.60%

[0038] P: ≤0.04 S: ≤0.04

[0039] V / Ti / Nb: 0.05~0.10

Embodiment 2

[0041] Figure 4, Figure 5, Figure 6 As shown, the composition of the stave main body (1) micro-alloyed chemical steel is as in Example 1. Inlaid and cast copper pieces (2), the inlaid structure increases the copper piece (2) with a width parallel to the cooling water pipe on the basis of embodiment 1, the cold end is connected with the water pipe (3), and the hot end is connected with the bottom of the dovetail groove In the same way, (4) is an inlaid cast refractory brick or refractory pounding material. Further improve the cooling capacity of the stave.

Embodiment 3

[0043] Figure 7, Figure 8, Figure 9 As shown, the cold surface of the stave is the stave body (1), and its material is microalloyed steel and its composition is as in Example 1. The rib arms of the stave dovetail are all inlaid and cast copper pieces (2). (3) is a cooling water pipe, and (4) is an inlaid cast refractory brick or refractory pounding material.

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Abstract

A cooling wall of blast furnace is made up of pure copper and microalloyed steel through combined casting. It has high thermal conductivity, rigidity, high-temp strength and thermal flushing and heat shock resistance. The surface of water tube inlaid in it is plated by Zn or Sn. The inlaid copper part is welded to the cooling water tubes.

Description

technical field [0001] The invention relates to a high thermal conductivity copper-steel composite casting blast furnace stave, which is composed of a stave body (1), embedded copper parts (2), cooling water pipes (3) and other connecting parts. It is an important cooling device for a blast furnace body, and the invention belongs to the technical field of ironmaking. technical background [0002] During the smelting process of the blast furnace, due to the damage of the brick lining in the bosh, furnace waist and lower part of the furnace shaft, the surface of the stave is directly exposed to the furnace, and is subject to severe heat load and impact, slag iron erosion, and strong gas flow erosion And the mechanical wear of the furnace charge, etc., so the stave in this area has always been the most severely damaged part of the stave. Seriously affect the service life of the blast furnace. [0003] The materials of traditional staves are gray cast iron, alloy cast iron, no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/10
Inventor 崔庆礼孙健钱世崇
Owner 孙健
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