CN207002770U - Assembled blast furnace cooling device - Google Patents

Abstract

The utility model proposes an assembled blast furnace cooling device, which is installed on the inner wall of the blast furnace shell and belongs to the field of iron and steel metallurgy. The assembled blast furnace cooling device includes a cooling wall and at least one cooling bar. The cooling wall has a hot surface facing the blast furnace cavity , the cooling bar is installed on the heat surface, the cooling bar includes a cooling bar body and two cooling water pipes, the cooling bar body has a cooling water channel opened along the axial direction of the cooling bar body, the cooling water channel has a water outlet and a water inlet, and The water inlet and the water outlet are respectively connected to the cooling water pipe, one end of the cooling water pipe is connected with the cooling bar body through a sealed pipe thread, and the other end of the cooling water pipe runs through the stave and the blast furnace shell. The assembled blast furnace cooling device has the advantages of simple structure, easy manufacture, stable performance and good cooling effect.

Description

An assembled blast furnace cooling device

technical field

The utility model belongs to the field of iron and steel metallurgy, in particular to an assembled blast furnace cooling device.

Background technique

As an important equipment of the blast furnace body, the blast furnace stave can protect the furnace shell and support the refractory material. It is required to have sufficient cooling capacity and be able to take away the heat transferred to it from the furnace through the cooling water. It is required that the working hot surface of the stave can form The protective layer of slag skin acts as a working lining to resist the impact of heat flow. In order to meet the above functions, the stave needs to have sufficient cooling capacity and good mechanical properties at the same time.

Theoretical and practical studies have shown that the longevity of the bosh, waist and lower part of the blast furnace does not depend entirely on refractory materials, but on whether the cooling equipment can work reliably for a long time. Practice has proved that to make the cooling equipment work reliably for a long time, it must rely on stable slag skin, which is the best "lining". Stable slag skin can effectively protect the cooling wall and prolong the life of the blast furnace.

For cast iron (cast steel) staves, the thermal conductivity of the material is low, and the cooling effect is poor, so it is difficult to form a stable slag skin protective layer. Due to its good thermal conductivity, the copper stave has a good cooling effect and can form slag skin in a short time. Its use is considered to solve the problem of the life of the bosh, furnace waist and lower part of the furnace. However, the use of copper staves in China is not satisfactory, and large areas of damage have occurred on a large number of blast furnaces. The fatal shortcoming of copper stave is excessive cooling, frequent shedding of slag skin and instability, so that the stave body is constantly exposed, and it is constantly subjected to high-temperature airflow erosion, chemical erosion, high-temperature furnace charge wear, etc., which eventually damages the copper stave.

In addition, the all-copper stave is generally made of pure copper casting or copper plate drilling, which consumes a lot of copper, is difficult to manufacture, and is expensive. In order to realize the complementary advantages of steel and copper in terms of performance and economy, and to reduce costs while ensuring the cooling effect, a combined copper-steel cooling stave has emerged in recent years. Combined staves are mostly made of copper plates and steel plates for welding to form bimetallic staves, and cooling water channels are formed inside to improve the cooling effect. The weld seam length of this combined stave is very large, and the weld seam is easy to crack under the high temperature state for a long time, and water leakage occurs.

Based on the above reasons, the inventor has made full use of the mechanical properties of cast iron (cast steel) staves and the good thermal conductivity of copper (or steel or cast iron) and cooling circulating water, and has developed an enhanced high-efficiency cooling device to overcome the limitations of the prior art Defects, guarantee the longevity of the blast furnace.

Utility model content

The purpose of the utility model is to provide an assembled blast furnace cooling device, which is simple in structure, easy to manufacture, stable in performance and good in cooling effect.

In order to achieve the above purpose, the utility model proposes a prefabricated blast furnace cooling device installed on the inner wall of the blast furnace shell, wherein the prefabricated blast furnace cooling device includes a cooling wall and at least one cooling strip, and the cooling wall has a The hot surface of the blast furnace cavity, the cooling bar is installed on the hot surface, the cooling bar includes a cooling bar body and two cooling water pipes, and the cooling bar body has a cooling bar along the axial direction of the cooling bar body A cooling water channel is opened, the cooling water channel has a water outlet and a water inlet, the water inlet and the water outlet are respectively connected to the cooling water pipe, and one end of the cooling water pipe is connected to the cooling bar body through the sealing pipe thread connected, the other end of the cooling water pipe runs through the stave and the blast furnace shell.

The prefabricated blast furnace cooling device as described above, wherein the cooling bar body is a copper cooling bar body.

In the prefabricated blast furnace cooling device as described above, the cooling bar body is a steel cooling bar body or a cast iron cooling bar body.

The above-mentioned prefabricated blast furnace cooling device, wherein, the inner wall of the water inlet and the inner wall of the water outlet are provided with internal threads, and the outer wall of the end of the cooling water pipe connected with the cooling strip body An external thread is provided, and both the external thread and the internal thread are sealing pipe threads.

The prefabricated blast furnace cooling device as described above, wherein the cooling water pipe is welded to the cooling strip body.

The prefabricated blast furnace cooling device as described above, wherein the stave is a cast iron stave or a cast steel stave.

The prefabricated blast furnace cooling device as described above, wherein the cooling device includes a plurality of cooling bars, and the plurality of cooling bars are arranged at intervals.

The above-mentioned prefabricated blast furnace cooling device, wherein, the hot surface has a plurality of grooves arranged at intervals, and each of the grooves is provided with one cooling bar.

The prefabricated blast furnace cooling device as described above, wherein the cooling strip body protrudes from the hot surface.

In the prefabricated blast furnace cooling device as mentioned above, the plurality of grooves are all opened in the horizontal direction.

Compared with the prior art, the utility model has the following characteristics and advantages:

In the assembled blast furnace cooling device proposed by the utility model, the cooling wall and the cooling bar are relatively independent. The cooling wall, the cooling bar body and the cooling water pipe can be processed from different materials, and the cooling wall and cooling water pipe that play a protective and supporting role can be selected. The material with good mechanical properties, the cooling bar body that plays a cooling role can be selected from materials with high thermal conductivity and good cooling effect, so that the prefabricated blast furnace cooling device has sufficient cooling capacity and good mechanical properties at the same time, and also realizes performance and Complementary economic advantages.

The cooling bar body and the cooling water pipe of the assembled blast furnace cooling device proposed by the utility model are connected through a sealing pipe thread, which ensures the tightness of the connection between the cooling water pipe and the cooling bar body.

The thermal conductivity of the cooling bar body of the assembled blast furnace cooling device proposed by the utility model is high, and cooling water circulates inside the cooling bar body with high thermal conductivity, and the cooling bar body is higher than the surface of the cooling wall, which is conducive to efficient heat transfer of the cooling bar body, Quickly form a protective layer of slag skin to protect the body of the cooling strip.

In the assembled blast furnace cooling device proposed by the utility model, a plurality of cooling strips are arranged at intervals, and the slag skin protection layers of each cooling strip are connected to form a whole, which can effectively protect the entire cooling device and prolong its service life.

Description of drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help the understanding of the present utility model, and do not specifically limit the shapes and proportional dimensions of the various components of the present utility model. Under the teaching of the utility model, those skilled in the art can choose various possible shapes and proportional dimensions according to specific conditions to implement the utility model.

Fig. 1 is the axonometric view of the installation situation of the assembled blast furnace cooling device of the present invention;

Fig. 2 is a top view of the installation situation of the assembled blast furnace cooling device of the present invention;

Fig. 3 is the axonometric view of the cooling bar body in the utility model;

Fig. 4 is the sectional view of cooling bar body in the utility model;

Fig. 5 is a sectional view of the cooling water pipe in the utility model;

Fig. 6 is the axonometric view of the cooling strip formed after the cooling strip body is connected with the cooling water pipe in the utility model;

Fig. 7 is the axonometric view of stave in the utility model;

Fig. 8 is a top view of the stave in the utility model.

Explanation of reference signs:

100 prefabricated blast furnace cooling device; 110 stave;

111 hot surface; 112 groove;

113 through holes; 120 cooling bars;

121 cooling bar body; 122 cooling water channel;

123 water outlets; 124 water inlets;

125 cooling water pipes; 200 furnace shells;

300 internal thread; 400 external thread;

500 welds.

detailed description

The details of the utility model can be understood more clearly in combination with the accompanying drawings and the description of the specific implementation of the utility model. However, the specific implementations of the utility model described here are only for the purpose of explaining the utility model, and cannot be construed as limiting the utility model in any way. Under the teaching of the present utility model, any possible deformation based on the present utility model can be conceived by a skilled person, and these should be regarded as belonging to the scope of the present utility model.

Please refer to Figures 1 to 8, the utility model provides a prefabricated blast furnace cooling device 100, which is installed on the inner wall of the blast furnace shell 200, the prefabricated blast furnace cooling device 100 includes a cooling wall 110 and at least one cooling strip 120, cooling The wall 110 has a hot surface 111 facing the furnace chamber of the blast furnace. The cooling strip 120 is installed on the hot surface 111. The cooling strip 120 includes a cooling strip body 121 and two cooling water pipes 125. There are cooling strips along the axial direction of the cooling strip body 121 in the cooling strip body. The cooling water channel 122 opened, the cooling water channel 122 has a water outlet 123 and a water inlet 124, the water inlet 124 and the water outlet 123 are respectively connected to a cooling water pipe 125, and one end of the cooling water pipe 125 is connected to the cooling bar body 121 through a sealed pipe thread , the other end of the cooling water pipe 125 runs through the stave 110 and the blast furnace shell 200 .

In the assembled blast furnace cooling device 100 proposed by the utility model, the stave 110, the cooling bar body 121 and the cooling water pipe 125 are relatively independent, and can be processed from different materials. The stave 110 that plays a protective and supporting role can be selected with good mechanical properties. The material of the cooling bar body 121 that plays a cooling role can be selected from materials with high thermal conductivity and good cooling effect, so that the prefabricated blast furnace cooling device as a whole has sufficient cooling capacity and good mechanical properties, and also realizes performance and economy. complementary advantages.

The assembly-type blast furnace cooling device 100 proposed by the utility model is connected between the cooling strip body 121 and the cooling water pipe 125 through a sealed pipe thread, which ensures the tightness of the connection between the cooling water pipe 125 and the cooling strip body 121 .

Cooling water circulates inside the cooling strip body 121 with high thermal conductivity, and the cooling strip body 121 is higher than the surface of the cooling wall 110, which is conducive to the efficient heat transfer of the cooling strip body 121, the rapid formation of a slag skin protective layer, and the protection of the cooling strip body 121. A plurality of cooling bars 120 are arranged at intervals, and the slag skin protection layers of each cooling bar are connected to form a whole, which can effectively protect the entire cooling device 100 and prolong its service life.

In an optional example of the utility model, the inner wall of the water inlet 124 and the inner wall of the water outlet 123 are provided with an internal thread 300, and the outer wall of the end of the cooling water pipe 125 connected with the cooling strip body 121 is provided with an external thread 400. , both the external thread 400 and the internal thread 300 are sealing pipe threads.

In an optional example of the present invention, the cooling water pipe 125 and the cooling strip body 121 are connected by welding. The cooling strip body 121 and the cooling water pipe 125 are welded after being threaded through a sealing pipe, which ensures the tightness of the connection between the cooling water pipe 125 and the cooling strip body 121 . That is, after the cooling water pipe 125 is screwed on the cooling bar body 121 by the sealing pipe thread, the cooling water pipe 125 and the cooling bar body 121 are welded and a weld 500 is formed, and the length of the weld 500 is only equivalent to the circumference of the cooling water pipe 125 Long, the length of the weld 500 is short, the welding quality is high, and the weld 500 can maintain stable performance under high temperature conditions. In this way, by sealing the pipe thread and welding, the tightness of the connection between the cooling water pipe and the cooling bar body is ensured, and the occurrence of water leakage is avoided.

The assembled blast furnace cooling device 100 proposed by the utility model has a simple structure and is easy to manufacture.

In an optional example of the present invention, the cooling bar body 121 is a copper cooling bar body. Due to the good thermal conductivity of copper, the cooling strip 120 can quickly transfer the internal heat of the blast furnace under the action of circulating cooling water flowing through the cooling water channel 122 inside the cooling strip body 121 and has sufficient cooling capacity. Moreover, due to the good thermal conductivity, a slag skin protective layer can be quickly formed on the surface of the cooling strip body 121 to reduce the abrasion of the cooling strip body 121 by the materials inside the blast furnace.

In an optional example of the present utility model, the cooling water pipe 125 can be a steel pipe, and due to the connection mode of sealing pipe thread and welding between the cooling strip body 121 and the cooling water pipe 125, the connection between the cooling strip body 121 and the cooling water pipe 125 can be fully guaranteed. The tightness of the connection between them can avoid the occurrence of water leakage.

In the utility model, the cooling water pipe 125 passes through the stave 110 and the furnace shell 200 and is connected with the external water cooling system of the blast furnace, so that the cooling circulating water continuously flows through the cooling channel 122 , and further realizes the cooling effect of the cooling bar 120 .

In an optional example of the present invention, the stave 110 is a cast iron stave or a cast steel stave. It not only makes full use of the good mechanical properties of iron and copper, but also reduces the manufacturing cost of the entire prefabricated blast furnace cooling device 100 .

In an optional example of the present invention, the prefabricated blast furnace cooling device 100 includes a plurality of cooling bars 120, and the plurality of cooling bars 120 are arranged at intervals. The cooling strips 120 arranged at intervals avoid the phenomenon of excessive cooling of the copper stave and frequent shedding of the slag skin, forming a stable slag skin protective layer connected to each other and covering the surface of the assembled blast furnace cooling device 100 proposed by the utility model, which can effectively Protect the entire cooling unit and prolong its service life.

In an optional example of the present invention, a plurality of grooves 112 arranged at intervals are provided on the heating surface 111 , and a cooling bar body 121 is placed in each groove 112 .

In an optional example, a plurality of grooves 112 are formed along the horizontal direction, and the cooling strip body 121 is also horizontally disposed in the corresponding grooves 112 .

In an optional example, the cooling bar body 121 is closely attached to the bottom surface of the groove 112 , and the cooling bar body 121 is supported by the cooling wall 110 .

The assembled blast furnace cooling device 100 proposed by the utility model optimizes the stress state of the connection weld between the cooling water pipe 125 and the cooling bar body 121 through the support of the groove 112 to the cooling bar body 121, so that the assembled blast furnace cooling device 100 On the whole, it has higher mechanical properties.

In another optional example, a plurality of grooves 112 are opened in a vertical direction, and the cooling bar body 121 is vertically disposed in the corresponding grooves 112 .

In an optional example of the present invention, the cooling bar body 121 protrudes from the hot surface 111 of the cooling wall, which further ensures that the copper material of the cooling bar body 121 and the good thermal conductivity of the cooling water circulation in the cooling water channel 122 can be fully utilized. At the same time, due to the enhanced effective heat transfer of the cooling strip 120 , the cooling strip 120 can quickly form a slag skin protection layer, thereby protecting the cooling strip 120 more effectively.

In an optional example of the present invention, the bottom surface of the groove 112 is provided with a through hole 113 for passing the cooling water pipe 125 . The through hole 113 not only facilitates the passage of the cooling water pipe 125 , but also plays a role of limiting and fixing the cooling water pipe 125 , so that the cooling bar body 121 connected with the cooling water pipe 125 can be more firmly arranged in the groove 112 .

In an optional example of the utility model, the water inlet 124 and the water outlet 123 are all set on the side (also known as the cold side) of the cooling bar body 121 facing away from the furnace cavity of the blast furnace, and the cooling bar body 121 is close to the groove On the bottom surface of 112 , the cooling strip body 121 is supported by the cooling wall 110 .

Of course, the material of the cooling bar body 121 is not limited to copper in the present utility model, steel or cast iron can also be used, or other known materials well known to those skilled in the art can also be used; the cooling bar body 121 and the cooling water pipe 125 can be selected from different The cooling strip body 121 and the cooling water pipe 125 can also be made of a uniform material through integral molding.

The material of the stave 110 can also adopt other known materials well known to those skilled in the art; wherein, when selecting, the material of the cooling bar body 121 mainly considers its thermal conductivity, and the material of the stave 110 mainly considers its mechanical properties and economic price. No further details are given here. For the detailed explanations of the above-mentioned embodiments, the purpose is only to explain the utility model so as to better understand the utility model, but these descriptions cannot be interpreted as a limitation of the utility model for any reason, especially, The various features described in different implementations can also be combined arbitrarily with each other to form other implementations. Unless there is an explicit description to the contrary, these features should be understood as being applicable to any implementation, and not limited to all of them. described implementation.

Claims (10)

1. A prefabricated blast furnace cooling device installed on the inner wall of the blast furnace shell, characterized in that the prefabricated blast furnace cooling device comprises a cooling wall and at least one cooling bar, and the cooling wall has a The cooling strip is installed on the heating surface, the cooling strip includes a cooling strip body and two cooling water pipes, and the cooling strip body has a cooling water channel opened along the axial direction of the cooling strip body , the cooling water channel has a water outlet and a water inlet, the water inlet and the water outlet are respectively connected to the cooling water pipe, one end of the cooling water pipe is connected to the cooling bar body through a sealed pipe thread, the The other end of the cooling water pipe runs through the stave and the blast furnace shell. 2. The prefabricated blast furnace cooling device according to claim 1, wherein the cooling bar body is a copper cooling bar body. 3. The prefabricated blast furnace cooling device according to claim 1, wherein the cooling bar body is a steel cooling bar body or a cast iron cooling bar body. 4. The prefabricated blast furnace cooling device according to claim 1, wherein internal threads are provided on the inner wall of the water inlet and the inner wall of the water outlet, and the cooling water pipe and the cooling strip body An external thread is provided on the outer wall of the connected end, and both the external thread and the internal thread are sealing pipe threads. 5. The prefabricated blast furnace cooling device according to claim 1, wherein the cooling water pipe is welded to the cooling strip body. 6. The prefabricated blast furnace cooling device according to claim 1, characterized in that, the stave is a cast iron stave or a cast steel stave. 7. The prefabricated blast furnace cooling device according to claim 1, characterized in that, the cooling device comprises a plurality of cooling strips arranged at intervals. 8. The prefabricated blast furnace cooling device according to claim 7, characterized in that, the hot surface is provided with a plurality of grooves arranged at intervals, and each of the grooves is provided with a cooling strip . 9. The prefabricated blast furnace cooling device according to claim 8, wherein the cooling strip body protrudes from the hot surface. 10. The prefabricated blast furnace cooling device according to claim 8, characterized in that, a plurality of said grooves are opened along the horizontal direction.