Novel tap hole structure for blast furnace

Abstract

The novel tap hole structure comprises a furnace shell, an iron notch frame is installed on the side face of the furnace shell and located at the position of a blast furnace iron notch, and a plurality of prefabricated parts extending towards the interior of the furnace shell are arranged in the center of the interior of the iron notch frame. The multiple prefabricated parts are connected end to end, stemming channels penetrating through the iron notch frame are formed in the prefabricated parts, and first protruding parts which protrude outwards and are evenly arranged are arranged outside the prefabricated parts; the mud sleeve structure is reasonable in design structure and convenient to use, the mud sleeve structure formed by the prefabricated part is adopted to replace an existing mud sleeve structure formed by laying refractory bricks and pouring refractory materials in an iron notch area, the service life of the iron notch area can be prolonged on the premise that the thermal shock stability and the structural stability of the iron notch area are improved, and the service life of the iron notch area is prolonged. And the maintenance cost rise caused by frequent damage is avoided, and the normal working requirement of the blast furnace is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace metallurgy, and in particular relates to a novel iron outlet structure for a blast furnace. Background Art

[0002] As a common smelting equipment, the iron-making blast furnace is widely used in all aspects of metal smelting and processing. The taphole, as an important component of the iron-making blast furnace, is one of the main process equipment for discharging slag iron in the iron-making production process. At present, a mud sleeve needs to be set on the taphole of the blast furnace shell, and the commonly used taphole mud sleeve is composed of refractory brick masonry and refractory material casting. The mud sleeve structure formed by refractory brick masonry has the defect of poor structural stability, and it is easy to produce tiny air gaps between brick joints during actual use, resulting in the problem of gas leakage in the furnace; and the mud sleeve cast by refractory material has the defects of long casting and molding time and high labor intensity, and its service life is also short. Generally speaking, it needs to be dismantled and rebuilt in one or two months, which affects the normal operation of the blast furnace, and then leads to the defects of short service life and frequent maintenance of the blast furnace taphole. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a new iron outlet structure for a blast furnace, which adopts a mud sleeve structure formed by prefabricated parts to replace the mud sleeve structure of refractory brick masonry and refractory material pouring in the existing iron outlet area. On the premise of improving the thermal shock stability and structural stability of the iron outlet area, the service life of the iron outlet area can be extended, the maintenance cost caused by frequent damage can be avoided, and the normal working requirements of the blast furnace can be met.

[0004] The technical solution adopted by the utility model is: a new type of iron outlet structure for a blast furnace, including a furnace shell, an iron outlet frame is installed on the side of the furnace shell at the position of the blast furnace iron outlet, the inner center position of the iron outlet frame has a plurality of prefabricated parts extending toward the inner direction of the furnace shell, the plurality of prefabricated parts are connected end to end and have a cannon mud channel penetrating the iron outlet frame formed therein, and the outer part of the prefabricated parts has a first protrusion that protrudes outward and is evenly arranged.

[0005] There are three prefabricated parts, which are replaceable prefabricated parts, connecting prefabricated parts and permanent prefabricated parts from the outside of the furnace shell to the inside of the blast furnace. The replaceable prefabricated parts, connecting prefabricated parts and permanent prefabricated parts are all conical structures, and the outer diameter decreases from the outside to the inside of the blast furnace.

[0006] The first protrusion is a semicircular structure, a trapezoidal structure or a triangular structure.

[0007] Among the two adjacent preforms, one preform has a second protruding portion protruding outward at its end, and the other preform has a groove portion matching the second protruding portion at its end.

[0008] A castable layer is also provided inside the furnace shell, and the castable layer is located outside the plurality of prefabricated parts.

[0009] A refractory brick layer is also provided inside the furnace body, and the refractory brick layer is located outside the castable layer.

[0010] The beneficial effects of the utility model are:

[0011] The utility model has a reasonable design structure and is easy to use. It adopts a mud sleeve structure formed by prefabricated parts to replace the existing mud sleeve structure of refractory brick masonry and refractory material pouring in the iron mouth area. It can extend the service life of the iron mouth area under the premise of improving the thermal shock stability and structural stability of the iron mouth area, avoid the increase of maintenance costs due to frequent damage, and meet the normal working requirements of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a three-dimensional diagram of the replaceable prefabricated part of the utility model;

[0014] Figure 3 It is a cross-sectional view of the replaceable prefabricated part of the utility model.

[0015] Among them: 1. furnace shell; 2. iron mouth frame; 3. replaceable prefabricated parts; 4. connecting prefabricated parts; 5. permanent prefabricated parts; 6. taphole mud channel; 7. casting material layer; 8. refractory brick layer; 9. first raised part; 10. second raised part. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] As shown in the figure, a new type of iron outlet structure for a blast furnace includes a furnace shell 1, an iron outlet frame 2 is installed on the side of the furnace shell 1 at the position of the iron outlet of the blast furnace, and the inner center position of the iron outlet frame 2 has a plurality of prefabricated parts extending toward the inner direction of the furnace shell 1, and the prefabricated parts are made of silicon nitride combined with silicon carbide. The plurality of prefabricated parts are connected end to end and a cannon mud channel 6 is formed inside the iron outlet frame 2. The prefabricated part structure is used as a mud sleeve structure in the iron outlet area. Compared with the refractory brick masonry method, it can avoid the problems of gas leakage and poor structural stability. Compared with the method of pouring refractory materials, it can reduce the difficulty and complexity of pouring at the iron outlet position, reduce labor costs, and extend its service life in the subsequent use process. The outside of the prefabricated part has a first protrusion 9 that protrudes outward and is evenly arranged. The first protrusion 9 is arranged in a ring-shaped protrusion at the outer wall position of the prefabricated part, which is mainly used to improve the stability of the installation structure of the prefabricated part itself and avoid shaking, displacement and other problems during use.

[0018] There are three prefabricated parts, which are a replaceable prefabricated part 3, a connecting prefabricated part 4 and a permanent prefabricated part 5 from the outside of the furnace shell 1 to the inside of the blast furnace. The replaceable prefabricated part 3, the connecting prefabricated part 4 and the permanent prefabricated part 5 are all conical structures, and the outer diameters decrease from the outside to the inside of the blast furnace. The replaceable prefabricated part 3 can be replaced after being used for a period of time. The connecting prefabricated part 4 is used as a connecting part between the replaceable prefabricated part 3 and the permanent prefabricated part 5. The permanent prefabricated part 5 is close to the inside of the blast furnace and can be used for a long time.

[0019] The first protrusion 9 is a semicircular structure, a trapezoidal structure or a triangular structure. In this example, the first protrusion 9 is a semicircular structure. In addition, it can also be designed as a trapezoidal structure or a triangular structure according to actual needs, mainly to improve the installation firmness of the prefabricated part (mud sleeve).

[0020] Among the two adjacent prefabricated parts, the end of one of the prefabricated parts has a second protruding part 10 protruding outward, and the end of the other prefabricated part has a groove part matching the second protruding part 10. This arrangement is, on the one hand, to facilitate the assembly between the adjacent prefabricated parts, and on the other hand, it can avoid the problem of gas leakage. In order to improve the sealing performance, the gap between the two adjacent prefabricated parts can be filled with high thermal conductivity silica sol castable during assembly.

[0021] A castable layer 7 is further provided inside the furnace shell 1 , and the castable layer 7 is located outside the plurality of prefabricated parts. A refractory brick layer 8 is further provided inside the furnace body, and the refractory brick layer 8 is located outside the castable layer 7 .

[0022] This new iron outlet structure for blast furnaces uses a mud sleeve made of prefabricated parts to replace the traditional refractory brick masonry or cast structure. On the one hand, it has the advantages of a more stable structure and avoidance of gas leakage. On the other hand, it has the advantages of simple installation and long service life.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 new tap hole structure for a blast furnace, characterized in that: The furnace shell comprises a furnace shell, an iron mouth frame is installed at the iron mouth of the blast furnace on the side of the furnace shell, a plurality of prefabricated parts are arranged at the center of the iron mouth frame and extend toward the inside of the furnace shell, the plurality of prefabricated parts are connected end to end and a taphole mud channel is formed inside the prefabricated parts and the prefabricated parts have a first protrusion that protrudes outward and is evenly arranged on the outside; There are three prefabricated parts, which are replaceable prefabricated parts, connecting prefabricated parts and permanent prefabricated parts from the outside of the furnace shell to the inside of the blast furnace. The replaceable prefabricated parts, connecting prefabricated parts and permanent prefabricated parts are all conical structures, and the outer diameters decrease from the outside of the blast furnace to the inside. The first protrusion is a semicircular structure, a trapezoidal structure or a triangular structure; Of the two adjacent preforms, one preform has a second protruding portion protruding outward at its end, and the other preform has a groove portion matching the second protruding portion at its end.

2. A new tap hole structure for a blast furnace according to claim 1, characterized in that: A castable layer is also provided inside the furnace shell, and the castable layer is located outside the plurality of prefabricated parts.

3. The novel tap hole structure for a blast furnace according to claim 1, characterized in that: A refractory brick layer is also provided inside the furnace body, and the refractory brick layer is located outside the castable layer.

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