Low thermal resistance cast-iron cooling wall and manufacturing method thereof

A manufacturing method and cooling stave technology, applied to furnace cooling devices, etc., can solve problems such as reduced cooling water heat transfer, accelerated stave damage process, and rise in stave body temperature, so as to increase heat transfer efficiency and prevent scaling on the inner wall Effects of slowing down and prolonging life

Inactive Publication Date: 2006-11-29
NANJING NANGANG IND DEV CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of scale is 1.6-1.8W / m·k, which is only 1 / 24-1 / 30 of the original material. The structure of the inner wall of the cooling water pipe leads to a significant decrease in the heat transfer of the cooling water and a substantial increase in the temperature of the cooling wall body. Accelerates the damage process of the stave

Method used

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  • Low thermal resistance cast-iron cooling wall and manufacturing method thereof
  • Low thermal resistance cast-iron cooling wall and manufacturing method thereof
  • Low thermal resistance cast-iron cooling wall and manufacturing method thereof

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Embodiment 1

[0029] A new type of low thermal resistance cast iron stave, and its manufacturing process (controlling cooling intensity casting process), see Figure 1 ~ Figure 3 :

[0030] New low thermal resistance cast iron stave: the stave body 1 is made of ductile iron or gray cast iron with high melting point (≥1200°C), and the cooling water channel 2 in the stave is composed of pure copper tube with low melting point (1080°C). The cooling water pipe is a pure copper pipe with anti-carburization, high thermal conductivity (340 kcal / m·h·℃), high elongation (≥30); the gap between the cooling wall body and the outer wall of the pure copper pipe is less than 0.1mm; Pure copper tubes are pure copper tubes with a wall thickness of 6-8 mm.

[0031] The preparation method steps of above structure are as follows:

[0032] Put the shaped pure copper tube into the sand box 3 made according to the shape of the stave and fix it;

[0033] While pouring with molten iron of ductile iron or gray ca...

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Abstract

The invention relates to a new type low thermal resistance cast iron cooling wall. The feature is that the identity material of cooling wall is nodular cast iron or gray cast iron and the cooling water channel in cooling wall is made up from pure copper. The clearance between the cooling wall identity and the outer wall of pure copper pipeline is below 0.1mm. The manufacture method includes the following steps: fixing the molded pure copper pipeline into the sand box; casting by molten iron of nodular cast iron or gray cast iron, and taking inertia vapor cooling to copper pipeline to molding. The invention eliminates the thermal resistance caused by anti seepage carbon coating layer to make the heat exchange efficiency sharply increase and prolong the useful life of cooling wall.

Description

technical field [0001] The technical field of the present invention is furnace body cooling technology of high-temperature furnaces such as ironmaking blast furnaces and other metallurgical furnaces, heating furnaces, and combustion furnaces. method. Background technique [0002] Furnace bodies of high-temperature furnaces such as ironmaking blast furnaces and other metallurgical furnaces, heating furnaces, and combustion furnaces all need cooling technology, that is, staves (device) are installed in the furnace wall. Traditional staves (devices) are made of nodular cast iron, gray cast iron, low carbon steel and pure copper staves, and any cooling stave (device) must be provided with a cooling water channel. In addition to the pure copper stave, the cooling water channels in the stave of other materials are all made of low carbon steel seamless steel pipe. [0003] 1. Cast iron stave [0004] In order to prevent the carburization of the cooling water pipe during the manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D1/12B22D11/04
Inventor 朱俊虹王东升张六喜
Owner NANJING NANGANG IND DEV CO LTD
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