Water-cooling fluid director suitable for blast furnace slag notch

Abstract

The invention relates to the technical field of blast furnace machining, in particular to a water-cooling fluid director suitable for a blast furnace slag notch, which comprises a water-cooling fluid director body, the water-cooling fluid director body comprises a front end part, a rear end part and a middle inclined part, and a fluid guide cavity is arranged in the water-cooling fluid director body; the rear end section is connected with the discharging end of the slag blocking machine, and a first water cooling structure is arranged on the rear end section; the front end section is connected with a blast furnace slag hole; the two ends of the middle inclined section are connected with the rear end section and the front end section correspondingly, a second water cooling structure is arranged on the middle inclined section, and the first water cooling structure communicates with the second water cooling structure; the water-cooling fluid director structure capable of replacing a mud sleeve at the slag hole of the blast furnace is provided, the service life of the water-cooling fluid director structure is more than 30 days, mud sleeve mud is not consumed any more, the labor cost for manufacturing the mud sleeve per shift is reduced, the labor intensity of workers is reduced, and the personal safety of the workers is improved.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace processing, and in particular to a water-cooled deflector suitable for a blast furnace slag outlet. Background Art

[0002] The main products of blast furnace ironmaking are high-temperature liquid molten iron and slag. In the production process, most blast furnaces use a method in which both high-temperature liquid molten iron and slag are discharged from the taphole and a slag scraper is used to remove the slag floating on the molten iron discharged from the taphole. However, there are still a considerable number of small and medium-sized blast furnace enterprises that use the blast furnace slag mouth to place slag on the slag during the blast furnace iron-making process. The main reasons include the following: (1) The scouring and erosion effect of slag on the taphole is stronger than that of molten iron. The discharge of part of the slag from the slag hole can reduce the working intensity of the taphole, which is conducive to maintaining a good taphole working condition and ensuring the safety of the ironmaking production process; (2) It can reduce the amount of iron in the slag. The high-temperature liquid iron and slag are discharged from the taphole. Since the molten iron and slag are mixed during the discharge process, the amount of iron in the slag will inevitably increase, resulting in an increase in the metal loss rate in the ironmaking production process. (3) Due to the influence of market and resource factors, in order to reduce production costs, smelting enterprises have recently shown a trend of inferior raw materials for blast furnace production. The grade of raw materials entering the furnace has generally decreased. The grade of raw materials entering the furnace of most small and medium-sized blast furnaces is even lower. The amount of smelting slag is large, so they have to retain the slag placement operation.

[0003] The existing technology mainly uses water-cannon mud to manufacture the slag hole mud sleeve, that is, water-cannon mud is injected into the blast furnace slag hole through a mud cannon to form a slag hole mud sleeve with water-cannon mud on the inner surface of each sleeve of the blast furnace slag hole. However, the slag hole mud sleeve manufactured by using water-cannon mud has the following disadvantages: (1) The service life of the slag mouth mud sleeve made of water cannon mud is short, generally 8h to 16h; (2) Frequent use of water-filled cannon mud to make slag mouth mud sleeves increases the labor intensity of on-site workers; (3) The use of water-containing cannon mud to manufacture the slag mouth mud sleeve requires a large amount of water-containing cannon mud, which increases the production cost.

[0004] The Chinese patent with announcement number CN104087695B provides a three-section casing structure for a blast furnace slag mouth mud sleeve, which improves the strength of the blast furnace slag mouth mud sleeve and its ability to resist scouring by blast furnace slag to a certain extent, but its overall service life is still 8h to 16h. The blast furnace slag mouth mud sleeve is slowly burned during the slag discharge process, and the slag mouth mud sleeve must be remade with mud every 8 hours, and the maintenance frequency is still high. Summary of the invention

[0005] In view of the above problems, the present invention provides a water-cooled deflector suitable for a blast furnace slag outlet.

[0006] The technical solution adopted is a water-cooled flow guide suitable for a blast furnace slag outlet, comprising a water-cooled flow guide body, wherein the water-cooled flow guide body is made of copper, the water-cooled flow guide body comprises a front end, a rear end and a middle inclined portion, and a flow guide cavity is arranged in the water-cooled flow guide body; The rear end section is connected to the discharge end of the slag blocking machine, and a first water cooling structure is provided on the rear end section; The front end section is connected to the blast furnace slag outlet; The two ends of the middle inclined section are connected to the rear end section and the front end section respectively, a second water cooling structure is provided on the middle inclined section, and the first water cooling structure is connected to the second water cooling structure; The guide cavity connects the discharge end of the slag blocking machine and the blast furnace slag outlet, and the inner wall of the guide cavity (2) is made of heat-conductive and wear-resistant copper.

[0007] Optionally, the middle inclined section is inclined downward from the front end section toward the rear end section.

[0008] Optionally, the first water-cooling structure includes a first infusion tube and a first water-cooling cavity, and the second water-cooling structure includes a second infusion tube and a second water-cooling cavity.

[0009] Optionally, the first liquid infusion tube is arranged on the middle inclined section and faces the rear end section, and the first liquid infusion tube is connected to the first water-cooling cavity; The first water-cooling cavity is disposed in the middle inclined section and is connected to the second water-cooling cavity; The second liquid infusion pipe is arranged on the rear end section and is away from the middle inclined section, and the second liquid infusion pipe is connected to the second water-cooling cavity; The second water-cooling cavity is arranged in the rear end section.

[0010] Optionally, the first infusion tube is used for inputting water-cooling liquid, and the second infusion tube is used for outputting water-cooling liquid.

[0011] Optionally, the first infusion tube is used for output of water-cooling liquid, and the second infusion tube is used for input of water-cooling liquid.

[0012] Optionally, a concave platform is provided at the top of the rear end section, and the concave platform exposes the guide cavity.

[0013] Optionally, a groove is provided at the top of the front end section, and the external pipeline can be inserted into the groove.

[0014] The benefits of the present invention include: 1. A water-cooled deflector structure is provided which can replace the blast furnace slag mouth mud sleeve. The service life is more than 30 days, and the mud sleeve mud is no longer consumed, which reduces the labor cost of making the mud sleeve per shift, reduces the labor intensity of workers, and improves the personal safety of operators.

[0015] 2. It solves the problem that the overall service life of the existing blast furnace slag mouth mud sleeve is still 8h to 16h, the blast furnace slag mouth mud sleeve is slowly burned during the slag discharge process, and the slag mouth mud sleeve must be remade every 8 hours, and the maintenance frequency is still high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a water-cooled deflector suitable for a blast furnace slag outlet; Figure 2 A schematic diagram of the internal structure of a water-cooled deflector suitable for a blast furnace slag outlet; Figure 3 A schematic diagram of the internal structure of a water-cooled deflector suitable for a blast furnace slag outlet from another perspective; Figure 4 It is a schematic diagram of the end structure of a water-cooled deflector suitable for a blast furnace slag outlet; Figure 5 A schematic diagram of the installation structure of a water-cooled deflector suitable for a blast furnace slag outlet; Figure 6 Schematic diagram of the interior of the blast furnace slag hole.

[0017] The figure numbers are as follows: 1 is the water-cooled deflector body, 101 is the front end, 102 is the middle inclined part, 103 is the rear end, 2 is the deflection cavity, 3 is the concave platform, 4 is the first infusion pipe, 5 is the second infusion pipe, 6 is the groove, 7 is the slag blocking machine, 8 is the blast furnace slag outlet, 9 is the external pipeline, and 10 is the refractory filler. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0019] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0020] like Figures 1 to 4As shown, a water-cooled guide device suitable for a blast furnace slag outlet comprises a water-cooled guide device body 1, wherein the water-cooled guide device body 1 is made of copper, the water-cooled guide device body 1 comprises a front end portion 101, a rear end portion 103 and a middle inclined portion 102, and a guide cavity 2 is arranged in the water-cooled guide device body 1; The rear end section 103 is connected to the discharge end of the slag blocking machine 7, and a first water cooling structure is provided on the rear end section 103; The front end section 101 is connected to the blast furnace slag opening 8; The two ends of the middle inclined section 102 are connected to the rear end section 103 and the front end section 101 respectively, a second water cooling structure is provided on the middle inclined section 102, and the first water cooling structure is connected to the second water cooling structure; The guide cavity 2 connects the discharge end of the slag blocking machine 7 and the blast furnace slag outlet 8, and the inner wall of the guide cavity (2) is made of heat-conducting and wear-resistant copper.

[0021] The purpose of this design is to provide a water-cooled deflector structure that can replace the blast furnace slag mouth mud sleeve, with a service life of more than 30 days, no longer consume the mud sleeve mud, reduce the labor cost of making the mud sleeve per shift, reduce the labor intensity of workers, and improve the personal safety of operators. It solves the problem that the overall service life of the existing blast furnace slag mouth mud sleeve is still 8h to 16h, the blast furnace slag mouth mud sleeve slowly burns during the slag discharge process, and the slag mouth mud sleeve must be remade every 8h, and the maintenance frequency is still high.

[0022] It should be pointed out that in actual production, heat-conductive and wear-resistant copper is used inside the guide cavity, red copper is used outside the water-cooled guide body, and the medium temperature is less than 1600°C.

[0023] In this embodiment, the middle inclined section 102 is inclined downward from the front section 101 toward the rear section 103 .

[0024] The purpose of this design is to use an inclined manner so that it is parallel to the slope inside the blast furnace slag mouth, which is convenient for overall installation.

[0025] In this embodiment, the first water-cooling structure includes a first liquid infusion tube 4 and a first water-cooling cavity, and the second water-cooling structure includes a second liquid infusion tube 5 and a second water-cooling cavity.

[0026] The first liquid infusion tube 4 is disposed on the middle inclined section 102 and faces the rear end section 103, and the first liquid infusion tube 4 is connected to the first water-cooling cavity; The first water-cooling cavity is disposed in the middle inclined section 102 and communicates with the second water-cooling cavity; The second liquid infusion tube 5 is arranged on the rear end section 103 and away from the middle inclined section 102, and the second liquid infusion tube 5 is connected to the second water-cooling cavity; The second water-cooling cavity is disposed in the rear end section 103 .

[0027] The purpose of this design is that the cold liquid can be input / output through the first infusion tube and the second infusion tube, and the cold liquid is temporarily stored through the first water-cooling cavity and the second water-cooling cavity so that it can complete heat exchange with the water-cooled deflector body to cool down and increase the service life, and finally be discharged.

[0028] In this embodiment, one cold liquid flow mode is that the first infusion tube 4 is used for water-cooling liquid input, and the second infusion tube 5 is used for water-cooling liquid output. Another cold liquid flow mode is that the first infusion tube 4 is used for water-cooling liquid output, and the second infusion tube 5 is used for water-cooling liquid input.

[0029] like Figure 5 and Figure 6 As shown, in the actual installation process, a recessed platform 3 is provided on the top of the rear end section 103 , and the recessed platform 3 exposes the guide cavity 2 , and a groove 6 is provided on the top of the front end section 101 , and the external pipeline 9 can be inserted into the groove 6 .

[0030] It should be pointed out that in actual use, additional refractory fillers are usually set at the bottom of the water-cooled deflector body to protect it. The perfusion cooling is adopted to ensure that the cavity is cooled in place without steam resistance. The design nominal pressure of the cooling cavity of the slag mouth slag deflector is: 2.0Mpa; cooling water pressure: 0.8Mpa.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for the sub-technical features thereof. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-cooled deflector suitable for a blast furnace slag outlet, comprising a water-cooled deflector body (1), characterized in that: The water-cooled flow guide body (1) is suitable for a blast furnace slag port (8), the water-cooled flow guide body (1) is made of red copper, the water-cooled flow guide body (1) comprises a front end portion (101), a rear end portion (103) and a middle inclined portion (102), and a flow guide cavity (2) is arranged in the water-cooled flow guide body (1); The rear end section (103) is connected to the discharge end of the slag blocking machine (7), and a first water cooling structure is provided on the rear end section (103); The front end section (101) is connected to the blast furnace slag opening (8); The two ends of the middle inclined section (102) are respectively connected to the rear end section (103) and the front end section (101); a second water cooling structure is provided on the middle inclined section (102), and the first water cooling structure is connected to the second water cooling structure; The guide cavity (2) connects the discharge end of the slag blocking machine (7) and the blast furnace slag outlet (8), and the inner wall of the guide cavity (2) is made of heat-conductive and wear-resistant copper.

2. The water-cooled deflector suitable for blast furnace slag outlet according to claim 1, characterized in that: The middle inclined section (102) is inclined downward from the front section (101) toward the rear section (103).

3. The water-cooled deflector suitable for a blast furnace slag hole according to claim 1, characterized in that: The first water-cooling structure comprises a first liquid infusion tube (4) and a first water-cooling cavity, and the second water-cooling structure comprises a second liquid infusion tube (5) and a second water-cooling cavity.

4. The water-cooled deflector suitable for a blast furnace slag hole according to claim 3, characterized in that: The first liquid infusion tube (4) is arranged on the middle inclined section (102) and faces the rear end section (103), and the first liquid infusion tube (4) is connected to the first water-cooling cavity; The first water-cooling cavity is arranged in the middle inclined section (102) and is connected to the second water-cooling cavity; The second liquid infusion tube (5) is arranged on the rear end section (103) and is away from the middle inclined section (102), and the second liquid infusion tube (5) is connected to the second water-cooling cavity; The second water-cooling cavity is arranged in the rear end section (103).

5. The water-cooled deflector suitable for a blast furnace slag hole according to claim 4, characterized in that: The first liquid infusion tube (4) is used for inputting water-cooling liquid, and the second liquid infusion tube (5) is used for outputting water-cooling liquid.

6. The water-cooled deflector suitable for blast furnace slag outlet according to claim 4, characterized in that: The first liquid infusion tube (4) is used for outputting water-cooling liquid, and the second liquid infusion tube (5) is used for inputting water-cooling liquid.

7. A water-cooled deflector suitable for a blast furnace slag hole according to claim 5 or 6, characterized in that: A concave platform (3) is provided on the top of the rear end section (103), and the concave platform (3) exposes the guide cavity (2).

8. The water-cooled deflector suitable for blast furnace slag outlet according to claim 7, characterized in that: The top of the front end section (101) is provided with a groove (6), and the external pipeline (9) can be inserted into the groove (6).

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