JPH0569598U - Refining furnace steel skin cooling structure - Google Patents

Abstract

(57) [Summary] [Purpose] To stabilize the cooling efficiency of the iron shell of the refining furnace, to improve the life of the iron shell and to extend the life of the cooling pipe at the same time. [Structure] In an iron-sheath cooling structure in which a water-cooling pipe is arranged in the iron-sheath of a refining furnace, high thermal conductivity is provided in the gap between the cooling-water pipe fixed to the iron-skin and the cooling-water pipe, and in the gap between the iron-skin and the cooling-water pipe. Filling with metal powder to improve the cooling rate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention particularly relates to partial cooling of steel shell of converters and refining furnaces such as electric furnaces and ladles.

[0002]

[Prior Art]

 This type of cooling device is used for cooling the converter furnace body of a steelmaking factory at the steelmaking plant, etc., and is installed for the purpose of reducing the melting rate of the refractory material lined inside the furnace body. is doing. For example, as shown in FIG. 2 disclosed in Japanese Examined Patent Publication No. 59-45726, a metal plate 3 is welded in a fin shape to a water cooling pipe 2 welded on a furnace shell 1 at appropriate intervals, and A partial cooling method has been proposed in which the other end surface is welded to a converter iron shell to create a gentle iron shell temperature gradient near the cooling part.

[0003]

[Problems to be solved by the device]

 However, in the case of the structure shown in FIG. 2, unless the pitch of the water cooling pipes 2 is sufficiently small, the thermal conductivity of the steel shell 1 and the distance between the pitches are inevitable between the water cooling pipes. In addition, uneven cooling of the iron shell 1 occurs, and the original purpose of reducing the melting rate of the refractory 4 cannot be sufficiently exerted. In addition, the metal plate 24 that creates a gentle iron skin temperature gradient in the vicinity of the water-cooled portion also has a non-uniform cooling of the iron skin unless the pitch is sufficiently small, and similarly the effect of reducing the melting loss rate cannot be exerted. become. In addition, since the water cooling pipe and the metal plate are welded to the steel skin in the exposed state, the welded part is deformed due to the drop of the bare metal at the time of tapping and slag in operation and the deformation of the steel skin due to long-term use. There was a high risk of a water leak from the water cooling pipe 2 due to cracks in the equipment, and there were frequent problems such as equipment shutdown during actual operation. Furthermore, even if water leakage does not occur, the effect of reducing the melting rate of the refractory 4 is further reduced when the water cooling pipe 2 and the metal plate 3 are removed from the iron shell, and the water cooling pipe is circular. Since it is mounted on the circumference, it is difficult to apply it locally to a place where meltdown is severe. In addition, in the cooling method using water cooling of the furnace body, in order to maintain heat removal efficiency, the amount of cooling water used is enormous, and remodeling costs and equipment costs for securing that water are also a considerable investment. The present invention has been made in view of the above circumstances and problems, and can prevent uneven cooling of the furnace body, and can apply a flexible cooling pattern, improving maintenance and maintainability and at low cost. It is an object of the present invention to provide a partial cooling device for a converter furnace body having a simple structure.

[0004]

[Means for Solving the Problems]

 Hereinafter, the iron skin cooling of the present invention will be described with reference to the drawings. FIG. 1 is an application example according to the present invention, and FIG. 2 is an application example of a conventional technique. In addition, the case of cooling the invented steel shell will be described as an example. In the figure, the converter furnace body 1 has a cooling water pipe 2 arranged on the iron skin 1 at a certain pitch by welding or winding around the iron skin 1 and the gap between the iron skin 1, the cooling water pipe 2 and the cooling water pipe. The box-shaped cover 5 is filled with fine metal powder 6 having high thermal conductivity. The cooling water used is cooled by circulating normal cooling water, or by cooling water, pure water, etc. by the refrigerator 7 and circulating the cooling water.

[0005]

[Action]

 With this structure, the metal powder 5 having a high heat conductivity, which is filled with the heat removal capacity of the water cooling pipe 2, is surely transferred to the furnace shell 1 for cooling, so that the heat removal efficiency is improved. It is possible to make the arrangement pitch rough and prevent uneven cooling of the steel shell 1 between the water cooling pipes. Due to this action, the effect of reducing the melting loss rate of the refractory 4 can be sufficiently exerted. Further, against the operation trouble of the water-cooled pipe 2 due to cracking of the welded part due to the drop of the metal and the deformation of the iron shell, and the deterioration of the cooling capacity due to the detachment, the metal powder 6 is always filled so that the heat removal effect is stable. Is obtained. Further, since the box-shaped cover 5 is used, it is possible to take a structure in which the metal is not directly contacted with the water cooling pipe 2. Also, since it has a box-shaped structure, it does not need to be mounted on the circumference, a flexible cooling pattern can be applied, and maintenance / maintenance can be improved. Furthermore, by using the refrigerator 7, a small amount of cooling water can be circulated and used, thereby reducing equipment costs, remodeling costs, and saving water.

[0006]

【Example】

 Next, the case where the cooling structure of the present invention is used in a ladle for a converter is shown. In both cases, a greater heat removal effect was obtained than with conventional water-cooled tube cooling, and the life of the steel shell was improved. <Conversion furnace body iron shell cooling result>

[0007]

[Table 1] <Ladle iron skin cooling result>

[0008]

[Table 2]

[0009]

[Effect of the device]

 As described above, the present invention can prevent uneven partial cooling of the furnace body when partially cooling the converter furnace body, and can apply a flexible cooling pattern, improving maintenance and maintainability and at low cost. It is possible to provide a partial cooling method having a simple structure.

[Brief description of drawings]

FIG. 1 is a plan view (a) and an enlarged sectional view (b) of an embodiment of a converter furnace cooling device of the present invention.

FIG. 2 is a plan view (a) showing a conventional example and an enlarged sectional view (b).

[Explanation of symbols]

 1 Iron skin 2 Water cooling tube 3 Metal plate 4 Refractory 5 Box cover 6 Metal powder 7 Refrigerator

Claims (1)

[Scope of utility model registration request] 1. In an iron skin cooling structure in which a water cooling pipe is provided in the iron skin of a refining furnace, high heat is generated in a gap between the cooling water pipe and the cooling water pipe fixed to the iron skin and in a gap between the iron skin and the cooling water pipe. An iron skin cooling structure for a refining furnace, which is characterized by being filled with conductive metal powder.