Slag-iron separation lintel of prefabricated skimmer

Abstract

The utility model relates to the technical field of blast furnace ironmaking equipment, in particular to a slag-iron separation lintel of a prefabricated skimmer. The lintel comprises a lintel body, the lintel body is a prefabricated part, a lifting lug is arranged on the top face of the lintel body, grooves extending up and down are formed in the two opposite sides of the lintel body, and the space between the lintel body and a lintel box is filled with castable so as to fill a gap between the lintel body and the lintel box; a cavity used for containing the lintel body is formed in the lintel box, an opening is formed in the top of the lintel box so that the lintel body can be conveniently installed, the lintel box is installed in the lintel pipe, the upper surface of the lintel box is flush with the upper surface of the lintel pipe, and a slag channel channel and an iron outlet channel after slag and iron separation are formed between the two adjacent sides of the lintel box and the two side walls of the lintel pipe correspondingly. The slag groove channel is used for discharging separated slag, and the iron outlet channel is used for discharging pure molten iron. According to the utility model, the technical problems of poor stability and low yield of a blast furnace caused by tedious steps, large casting amount and long baking time of cast-in-place lintels in the prior art are effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace ironmaking equipment, and in particular to a prefabricated slag skimmer slag-iron separation lintel. Background Technology

[0002] The slag skimmer is an essential piece of equipment in the operation of a blast furnace. It is mainly used to separate slag and iron during the tapping process. The lintel plays a supporting and separating role during the tapping process, ensuring that molten iron can pass through smoothly, while blocking molten slag from flowing into the molten iron channel, thereby achieving effective separation of slag and iron.

[0003] Currently, lintels are mostly fabricated using on-site casting. The fabrication process begins with erecting a stable formwork and support system based on the lintel's design dimensions and shape. Then, qualified castable refractory is mixed according to the designed strength grade, and finally poured. During pouring, a vibrator is used to compact the refractory refractory to remove air bubbles and improve its density and strength. The thickness of the refractory refractory must be strictly controlled to ensure it meets design requirements. After pouring, the refractory refractory is baked after initial setting before being put into use.

[0004] It can be seen that the on-site casting of lintels is a complicated process with a large casting volume and a long baking time. During the baking process, the lintels are prone to cracking and low strength, resulting in a short service life. This leads to poor stability and low output in blast furnace production, longer blast reduction time for single-tap blast furnaces and longer tapping time for single tapping ... Utility Model Content

[0005] This utility model provides a prefabricated slag skimmer slag-iron separation lintel to solve the technical problems of cumbersome steps, large casting volume, and long baking time in the existing cast-in-place lintel, which leads to poor blast furnace stability and low output.

[0006] To solve the above problems, the prefabricated slag skimmer slag-iron separation lintel provided by this utility model adopts the following technical solution:

[0007] A prefabricated slag skimmer slag-iron separation lintel includes a lintel body, which is a prefabricated component with lifting lugs on its top surface and vertically extending grooves on both opposite sides. Castable refractory fills the gap between the lintel body and the lintel chamber. The lintel chamber has a cavity for accommodating the lintel body, with an opening at the top for installation. The lintel chamber is installed inside the lintel tube, and its upper surface is flush with the upper surface of the lintel tube. Slag channels and tapping channels are formed between the two adjacent sides of the lintel chamber and the two side walls of the lintel tube, respectively. The slag channels are used to discharge the separated slag, and the tapping channels are used to discharge pure molten iron.

[0008] The beneficial effects of the prefabricated slag skimmer and slag-iron separation lintel provided by this utility model are:

[0009] 1. By setting prefabricated lintel bodies in the lintel box, the amount of cast-in-place work is reduced, the cast-in-place time and baking time of the lintel are shortened, thereby reducing the blast furnace blast reduction time and ensuring the production efficiency and output of the blast furnace.

[0010] 2. By installing lifting lugs on the top surface of the lintel body, the transportation of the lintel body is facilitated; by opening vertically extending grooves on both sides of the lintel body, the cast-in-place area between the lintel body and the lintel enclosure is increased, thereby enhancing the bonding force between the precast lintel body and the lintel enclosure, improving the overall strength and stability. In addition, the cast-in-place refractory can fill the tiny cracks and pores on the surface of the precast lintel body, reducing the intrusion of moisture, oxygen and other harmful substances, extending the service life of the lintel body, and improving its durability and impermeability.

[0011] Through the above-mentioned design, this utility model effectively solves the technical problems of cumbersome steps, large casting volume, and long baking time in the existing technology of cast-in-place lintels, which lead to poor blast furnace stability and low output.

[0012] Furthermore, the slag channel is connected to a slag ditch for conveying the separated slag, and the tapping channel is connected to a tapping ditch for conveying pure molten iron.

[0013] Furthermore, both the slag ditch and the iron tapping ditch are located at the upper end of the crossbeam pipe, and the opening height of the slag ditch is higher than that of the iron tapping ditch.

[0014] Furthermore, the slag ditch is inclined downwards.

[0015] Furthermore, the cross-section of the lintel tube is rectangular.

[0016] Furthermore, the lintel tube is a U-shaped tube.

[0017] Furthermore, the groove is a V-shaped groove.

[0018] Furthermore, the number of lifting lugs is two, and the two lifting lugs are spaced apart along the length of the top surface of the main body of the beam. Attached Figure Description

[0019] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 A schematic diagram of the application structure of the prefabricated slag skimmer and slag-iron separation lintel provided by this utility model;

[0021] Figure 2 for Figure 1 The top view of the application structure diagram of the prefabricated slag skimmer slag-iron separation lintel shown;

[0022] Figure 3 This is a top view of the slag-iron separation lintel of the prefabricated skimmer provided by this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Main body of the lintel; 2. Lifting lug; 3. V-shaped groove; 4. Lintel pipe; 5. Slag ditch; 6. Iron discharge ditch; 7. Lintel enclosure; 8. Slag-containing iron ditch. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that the main concept of the prefabricated slag skimmer slag-iron separation lintel provided by this utility model is as follows: by installing the prefabricated lintel body 1 in the lintel box 7 and filling the gap between the lintel body 1 and the lintel box 7 with cast-in-place refractory, the amount of cast-in-place work of the lintel is reduced, the cast-in-place time and baking time of the lintel are shortened, and the time of blast furnace blast reduction caused by casting the lintel is reduced, thus ensuring the production efficiency and output of the blast furnace; by setting the vertically extending grooves on both sides of the lintel body 1, the cast-in-place area between the lintel body 1 and the lintel box 7 is increased, the bonding force between the two is enhanced, and the overall strength and stability are improved.

[0027] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0028] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0029] Example 1 of the prefabricated slag skimmer slag-iron separation lintel provided by this utility model:

[0030] like Figures 1 to 3As shown, the prefabricated slag skimmer slag-iron separation lintel includes a lintel body 1 and a lintel box 7 for accommodating the lintel body 1. The lintel box 7 is installed inside the lintel pipe 4, and its upper surface is flush with the upper surface of the lintel pipe 4. The lintel pipe 4 is connected to the slag-iron trough 8 so that pure molten iron containing separation can be introduced into the lintel pipe 4 through the slag-iron trough 8.

[0031] Regarding the lintel box 7 and the lintel body 1: The lintel box 7 has a cavity inside for accommodating the lintel body 1. The top surface of the lintel box 7 is open to facilitate the installation of the lintel body 1. The lintel body 1 is a rectangular precast castable component with lifting lugs 2 on its top surface and two vertically extending grooves on each of its left and right sides. The space between the lintel body 1 and the lintel box 7 is filled with castable refractory to fill the gap between them and prevent molten iron or slag from flowing in.

[0032] Specifically, the groove is a V-shaped groove 3, and there are two lifting lugs 2. The two lifting lugs 2 are spaced apart on the top surface of the main body of the beam along its length.

[0033] Regarding the lintel pipe 4: The lintel pipe 4 is a U-shaped pipe with a rectangular cross-section. The two adjacent sides of the lintel box 7 and the two side walls of the lintel pipe 4 respectively form slag channels for discharging the separated slag and tapping channels for discharging pure molten iron.

[0034] The slag channel is connected to a slag ditch 5 for conveying the separated slag, and the iron tapping channel is connected to an iron tapping ditch 6 for conveying pure molten iron. Both the slag ditch 5 and the iron tapping ditch 6 are located at the upper end of the beam pipe 4, and the opening height of the slag ditch 5 is higher than the opening height of the iron tapping ditch 6. The slag ditch 5 is set at an angle downward.

[0035] The working principle of the prefabricated slag skimmer and slag-iron separation lintel provided by this utility model is as follows: the molten iron flowing out of the blast furnace is transported to the lintel pipe 4 through the iron trough 8. Since the density of molten slag is less than that of molten iron, the slag will naturally float on the surface of the molten iron in the lintel pipe 4. Then, it is transported out through the slag channel from the slag trough 5. The pure molten iron with the slag skimmed off is transported out through the tapping channel from the tapping trough 6.

[0036] Example 2 of the prefabricated slag skimmer slag-iron separation lintel provided by this utility model:

[0037] Its main difference from Example 1 is:

[0038] In Example 1, there are two lifting lugs.

[0039] In this embodiment, the number of lifting lugs is one or three.

[0040] Example 3 of the prefabricated slag skimmer slag-iron separation lintel provided by this utility model:

[0041] Its main difference from Example 1 is:

[0042] In Example 1, the groove is a V-shaped groove.

[0043] In this embodiment, the groove is an inwardly concave arc-shaped groove.

[0044] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0045] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A prefabricated slag skimmer slag-iron separation lintel, characterized in that, The system includes a precast lintel body with lifting lugs on its top surface and vertically extending grooves on both sides. The lintel body and the lintel chamber are filled with castable refractory to seal the gap. The lintel chamber has a cavity to accommodate the lintel body, with an opening at the top for installation. The lintel chamber is installed inside the lintel tube, with its upper surface flush with the upper surface of the lintel tube. The two adjacent sides of the lintel chamber and the two side walls of the lintel tube respectively form slag channels and tapping channels for slag and iron separation. The slag channels are used to discharge the separated slag, and the tapping channels are used to discharge pure molten iron.

2. The prefabricated slag skimmer slag-iron separation lintel according to claim 1, characterized in that, The slag channel is connected to a slag ditch for conveying separated slag, and the tapping channel is connected to a tapping ditch for conveying pure molten iron.

3. The prefabricated slag skimmer slag-iron separation lintel according to claim 2, characterized in that, Both the slag ditch and the iron tapping ditch are located at the upper end of the crossbeam pipe, and the opening height of the slag ditch is higher than that of the iron tapping ditch.

4. The prefabricated slag skimmer slag-iron separation lintel according to claim 3, characterized in that, The slag ditch is inclined downwards.

5. The prefabricated slag skimmer slag-iron separation lintel according to any one of claims 1 to 4, characterized in that, The cross-section of the lintel tube is rectangular.

6. The prefabricated slag skimmer slag-iron separation lintel according to claim 5, characterized in that, The lintel tube is a U-shaped tube.

7. The prefabricated slag skimmer slag-iron separation lintel according to any one of claims 1 to 4, characterized in that, The groove is a V-shaped groove.

8. The prefabricated slag skimmer slag-iron separation lintel according to any one of claims 1 to 4, characterized in that, The number of lifting lugs is two, and the two lifting lugs are spaced apart along the length of the top surface of the main body of the beam.

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