Communicating type scrap steel packing block structure and manufacturing mold

Abstract

The utility model discloses a communicated type scrap steel packing block structure and a manufacturing die, and relates to the technical field of scrap steel packing blocks and scrap steel smelting. The communicating type waste steel packaging block structure comprises a waste steel packaging block, the waste steel packaging block with holes is internally provided with at least two closed cavities used for being filled with fuel, the closed cavities are communicated through communicating holes, and the communicating holes are communicated with the waste steel packaging block. And the communicating holes are used for introducing molten steel in a certain closed cavity into other closed cavities in the steelmaking process of the steel scrap packaging block with the holes. According to the communicated type waste steel packing block structure and the manufacturing method, the communicating holes are formed between the closed cavities of the waste steel packing block with the multiple closed cavities, molten steel can be introduced into other closed cavities after entering one closed cavity, the molten steel reacts with fuel in the closed cavities in time, and then the smelting efficiency of the waste steel packing block is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scrap steel packaging blocks and scrap steel smelting, in particular to a connected scrap steel packaging block structure and a manufacturing mould. Background Art

[0002] In order to improve the scrap ratio in the steel production process, Professor Chen Linquan conducted theoretical calculations and analyses on the melting of scrap steel in molten iron and molten steel, and conducted field verification. The melting process of scrap steel in molten iron is usually at a temperature of 1250℃~1500℃, while the melting point of scrap steel is above 1500℃. Because the melting point of scrap steel is higher than the temperature of molten iron, according to the thermodynamic model and experiment of scrap steel melting, the melting process of scrap steel in molten iron is considered to be as follows: In the early stage of melting, the temperature difference between scrap steel and molten iron is large, and molten iron solidifies on the surface of scrap steel to form a solidified layer; as time goes by, the temperature of scrap steel rises, and the solidified layer on the surface begins to melt; carbon in molten iron transfers to the surface of scrap steel to form a carburized layer; the temperature of scrap steel continues to rise, the carbon content on the surface of scrap steel increases, and the melting point decreases; when the melting point of the carburized layer on the surface of scrap steel is lower than the temperature of the molten pool, the scrap steel melts to form a liquid. Then the scrap steel surface repeats solidification → carburization → melting until all the scrap steel is melted. Therefore, the limiting link in the melting of scrap steel in molten iron is the mass transfer of carbon on the surface of the scrap steel.

[0003] Scrap steel can be made into blocks for easy storage, transportation, and recovery from the furnace for reuse, and the loss is extremely low. It is an effective way to process scrap steel. However, the interior of the scrap steel blocks is dense, which is not conducive to heat transfer, mass transfer, conduction, convection, and radiation.

[0004] Currently, there is a method of adding fuel to the converter, but when the scrap steel is smelted, the fuel will float directly to the surface of the molten steel and cannot fully contact the scrap steel and generate heat, thereby reducing the smelting efficiency of the scrap steel.

[0005] Although the prior art, such as the invention with application number CN202210398966.X, discloses a metal packaging block and a pressing mold, pressing equipment, and method, in which a metal packaging block structure with a closed cavity is used to improve the heat transfer effect in the scrap steel smelting process (a compact structure without through holes), and adding the fuel required for smelting in the closed cavity can also make the fuel fully contact and generate heat, further improving the smelting efficiency of the scrap steel, but in actual use, the molten steel needs to melt the closed cavity wall before it can contact and react with the fuel in the closed cavity. When multiple closed cavities are used, the molten steel needs to melt each closed cavity wall one by one before it can contact and react with the fuel, thereby delaying the time for the fuel to participate in the smelting. When the wall thickness is uncertain, the uncertainty of the time for the fuel to participate in the smelting is increased, thereby reducing the smelting efficiency of the scrap steel. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the shortcomings of the prior art, the utility model provides a connected scrap steel packing block structure and a manufacturing mold, which solves the following technical problems:

[0008] In the prior art, during the scrap steel smelting process, the scrap steel package with multiple closed cavities can only contact and react with the fuel after the molten steel melts the walls of each closed cavity one by one, which is not conducive to improving the smelting efficiency.

[0009] To achieve the above objectives, the utility model is implemented through the following technical solutions: a connected scrap steel packaging block structure, including a scrap steel packaging block with holes, wherein the scrap steel packaging block with holes is provided with a closed cavity for filling fuel, the number of the closed cavities is at least two, and the closed cavities are connected by connecting holes, and the connecting holes are used to introduce molten steel in a closed cavity into other closed cavities during the steelmaking process of the scrap steel packaging block with holes.

[0010] Preferably, it includes a drainage hole, the end of which is connected to the outside of the scrap steel package block, and the drainage hole is connected to one of the closed cavity and the connecting hole, and the drainage hole is used to introduce molten steel outside the scrap steel package block into one of the closed cavity and the connecting hole.

[0011] Preferably, the cross-section of the connecting hole is one of a semicircular hole and a circular hole.

[0012] Preferably, the scrap steel package block comprises an upper half of the scrap steel package block and a lower half of the scrap steel package block;

[0013] The bottom of the upper half of the scrap steel packing block and the top of the lower half of the scrap steel packing block are both provided with closed cavity grooves, and the closed cavity grooves at the bottom of the upper half of the scrap steel packing block correspond to the closed cavity grooves at the top of the lower half of the scrap steel packing block and can be combined into a closed cavity;

[0014] The left and right sides of the bottom of the upper half of the scrap steel packaging block are respectively provided with an installation groove A and an installation block A, and the left and right sides of the top of the lower half of the scrap steel packaging block are respectively provided with an installation block B and an installation groove B. The installation groove A and the installation block A can be respectively matched and connected with the installation block B and the installation groove B.

[0015] A manufacturing mold for a connected scrap steel packaging block structure, wherein the bottom of the mold is provided with a mounting block pressing groove, a closed cavity pressing block, a mounting groove pressing block and a connecting hole pressing block;

[0016] The mounting block pressing groove is used to press the mounting groove A and the mounting groove B;

[0017] The closed cavity pressing block is used to press the closed cavity groove;

[0018] The communicating hole pressing block is used for pressing the communicating hole.

[0019] Preferably, a drainage hole pressing block is provided at the bottom of the mold, one end of the drainage hole pressing block is connected to one of the connecting hole pressing block and the closed cavity pressing block, and the other end extends to the side of the mold.

[0020] A method for manufacturing a connected scrap steel packing block structure, comprising a manufacturing mold for the connected scrap steel packing block structure, wherein the characteristic surfaces of the upper half of the scrap steel packing block and the lower half of the scrap steel packing block are a bottom surface and a top surface respectively, and the manufacturing method comprises the following steps:

[0021] Step 1: Use a mold to press two pieces of scrap steel packaging blocks with characteristic surfaces;

[0022] Step 2: Place one of the scrap steel packages on top of another scrap steel package;

[0023] Step 3: Flip the scrap steel packing block located at the top in the vertical direction, so that the scrap steel packing block located at the top is the upper half of the scrap steel packing block, and the scrap steel packing block located at the bottom is the lower half of the scrap steel packing block;

[0024] Step 4: Connect the upper half of the scrap steel packaging block and the lower half of the scrap steel packaging block through the mounting groove A, mounting block A and the mounting block B, mounting groove B.

[0025] The utility model provides a connected scrap steel packing block structure and a manufacturing mold, which has the following beneficial effects:

[0026] (1) The interconnected scrap steel packing block structure is provided with interconnecting holes between the closed cavities of the scrap steel packing block with multiple closed cavities. After molten steel enters a certain closed cavity, the molten steel can be introduced into other closed cavities, so that the molten steel can react with the fuel in the closed cavity in time, thereby improving the smelting efficiency of the scrap steel packing block.

[0027] (2) The interconnected scrap steel package block structure adds a drainage pipe on the basis of the connecting hole to control the time when the molten steel enters the closed cavity, thereby improving the control of the starting time of the reaction between the molten steel and the fuel during the smelting of the scrap steel package block. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The front view of the existing scrap steel packaging block with a closed cavity;

[0029] Figure 2 The cross-section diagram of an existing scrap steel packing block with a closed cavity is shown;

[0030] Figure 3 It is the lower half front view of the existing scrap steel packing block with a closed cavity;

[0031] Figure 4 It is a top view of the lower half of an existing scrap steel packing block with a closed cavity;

[0032] Figure 5 The front view of the existing scrap steel packing block mold with a closed cavity;

[0033] Figure 6 A top view of an existing scrap steel packing block mold with a closed cavity;

[0034] Figure 7 This is a top view of the lower half of the interconnected scrap steel packing block structure of the utility model (only the interconnecting hole);

[0035] Figure 8 This is a cross-sectional view of the structure of the interconnected scrap steel packaging block of the utility model;

[0036] Fig. 9 This is a longitudinal sectional view of the interconnected scrap steel packing block structure of the utility model;

[0037] Fig.10 This is a top view of the lower half of the interconnected scrap steel packing block structure of the utility model (the drainage hole is connected with the closed cavity);

[0038] Fig.11 This is a top view of the lower half of the interconnected scrap steel packing block structure of the utility model (the drainage hole is connected with the connecting hole);

[0039] Fig.12 This is the front view of the interconnected scrap steel packaging block mold of the utility model;

[0040] Fig.13 This is a bottom view of the utility model's interconnected scrap steel packaging block mold (double interconnected hole pressing block);

[0041] Fig.14 This is a bottom view of the utility model's interconnected scrap steel packaging block mold (single interconnected hole pressed block);

[0042] Fig.15 It is a cross-sectional view of a connected scrap steel packing block pressed by a single connected hole pressing block mold;

[0043] Fig.16 It is a longitudinal sectional view of a connected scrap steel packing block pressed by a single connected hole pressing block mold;

[0044] Fig.17 This is the front view of the utility model's interconnected scrap steel packing block mold (with drainage hole pressing block);

[0045] Fig.18 This is a bottom view of the interconnected scrap steel packing block mold of the utility model (a pressed block with drainage holes);

[0046] Fig.19 This is the front view of the mold of the scrap steel packing block with drainage holes in the utility model (single drainage hole pressed block);

[0047] Fig. 20This is a bottom view of the mold of the scrap steel packing block with drainage holes in the utility model (single drainage hole pressed block);

[0048] Fig.21 It is a cross-sectional view of a scrap steel packing block pressed by a single drainage hole pressing block;

[0049] Fig. 22 for Fig.21 ABA cross-section diagram in;

[0050] Fig.23 This is a schematic diagram of the manufacturing process of the interconnected scrap steel packaging block mold of the utility model.

[0051] In the figure: 1, scrap steel packing block; 11, upper half of scrap steel packing block; 111, mounting groove A; 112, mounting block A; 12, lower half of scrap steel packing block; 121, mounting block B; 122, mounting groove B; 14, closed cavity A; 141, closed cavity groove A; 15, closed cavity B; 151, closed cavity groove B;

[0052] Mold; 21, mounting block pressing groove; 22, mounting groove pressing block; 24, closed cavity pressing block A; 25, closed cavity pressing block B; 26, communicating hole pressing block; 27, drainage hole pressing block;

[0053] 3. Connecting hole;

[0054] 4. Drainage hole. DETAILED DESCRIPTION

[0055] 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 in 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.

[0056] The cross-sectional dimensions of the metal packaged blocks pressed in the following embodiments and comparative examples are all 0.8m*1.2m, the length is all 1.2m, the diameter of the closed cavity is 10cm, the number of the closed cavities is two, the length of the closed cavity is not less than 0.6m, the initial carbon content is 0.1%, the mounting block adopts a triangular prism, and the mounting groove adopts a triangular prism groove. The height of the triangular prism is 5cm, the bottom of the triangular prism is 4cm, the triangular prism and the triangular prism groove have an interference fit or a transition fit, the heat-generating element C content of the coke is 85%, the initial temperature of the metal packaged block is 25°C, and coke is added during the converter smelting process in a mass ratio of 0.59:1000 to the metal packaged block.

[0057] like Figure 1 to Figure 6The scrap steel packing block 1 in the following embodiments and comparative examples comprises an upper scrap steel packing block 11 and a lower scrap steel packing block 12; the bottom of the upper scrap steel packing block 11 and the top of the lower scrap steel packing block 12 are both provided with closed cavities, and the closed cavities at the bottom of the upper scrap steel packing block 11 correspond to the positions of the closed cavities at the top of the lower scrap steel packing block 12 and can be combined into a closed cavity; the left and right sides of the bottom of the upper scrap steel packing block 11 are respectively provided with mounting grooves A111 and mounting blocks A112, and the left and right sides of the top of the lower scrap steel packing block 12 are respectively provided with mounting blocks B121 and mounting grooves B122, and the mounting grooves A111 and mounting blocks A112 can be respectively matched and connected with the mounting blocks B121 and the mounting grooves B122.

[0058] A connected scrap steel package block structure comprises a scrap steel package block 1. The scrap steel package block 1 is provided with a closed cavity for filling fuel. The number of the closed cavities is two. The closed cavities are connected by a connecting hole 3. The connecting hole 3 is used to introduce molten steel in a closed cavity into another closed cavity during the steelmaking process of the scrap steel package block 1 with holes.

[0059] in:

[0060] The connecting hole 3 can be processed by pressing, and the bottom of the pressing mold 2 is provided with a mounting block pressing groove 21, a closed cavity pressing block, a mounting groove pressing block 22 and a connecting hole pressing block 26; the mounting block pressing groove 21 is used to press the mounting groove A111 and the mounting groove B122; the closed cavity pressing block is used to press the closed cavity groove; the connecting hole pressing block 26 is used to press the connecting hole 3.

[0061] like Fig.23 , the compression process is as follows:

[0062] The characteristic surfaces of the upper half 11 of the scrap steel packing block and the lower half 12 of the scrap steel packing block are the bottom surface and the top surface respectively, including the following steps:

[0063] Step 1: Use mold 2 to press two pieces of scrap steel packaging blocks with characteristic surfaces;

[0064] Step 2: Place one of the scrap steel packages on top of another scrap steel package;

[0065] Step 3: flipping the scrap steel packing block located at the top in the vertical direction, where the scrap steel packing block located at the top is the scrap steel packing block upper half 11, and the scrap steel packing block located at the bottom is the scrap steel packing block lower half 12;

[0066] Step 4: Connect the upper half 11 of the scrap steel packaging block and the lower half 12 of the scrap steel packaging block through the mounting groove A111, the mounting block A112, the mounting block B121, and the mounting groove B122.

[0067] In this embodiment, the communicating hole pressing block 26 can be provided at one or two. Note that when two communicating hole pressing blocks 26 are provided, the center (the center of the scrap steel packing block) can be selected for symmetrical arrangement, so that the communicating holes 3 of the upper half 11 of the scrap steel packing block and the lower half 12 of the scrap steel packing block can be also assembled together when the two scrap steel packing blocks are assembled together later (such as Figure 7~Figure 8 ), at this time, the cross section of the connecting hole 3 is a circular hole.

[0068] When a connecting hole pressing block 26 is provided, as Figure 14~Figure 16 A pair of connecting holes 3 are pressed out but are not spliced ​​together. Instead, they are fitted together with the flat part of the other half of the packaging block (the cross section of the connecting hole 3 is a semicircular hole at this time), but the two closed cavities are still connected together.

[0069] The upper half 11 of the scrap steel packing block and the lower half 12 of the scrap steel packing block are both pressed by the mold 2, and the connecting hole 3 does not need to be completely spliced ​​and assembled, so it is possible to set a single through-hole pressing block 26. The technical purpose of setting a single through-hole pressing block 26 is to simplify the complexity of the mold and reduce the maintenance cost of the mold.

[0070] On the basis of Example 1, it includes a drainage hole 4, the end of which is connected to the outside of the scrap steel package block 1, and the drainage hole 4 is connected to the closed cavity. The drainage hole 4 is used to introduce the molten steel outside the scrap steel package block 1 into the closed cavity.

[0071] The bottom of the mold 2 used in this embodiment is provided with a drainage hole pressing block 27 , one end of the drainage hole pressing block 27 is connected to the closed cavity pressing block, and the other end extends to the side of the mold 2 .

[0072] Based on Example 1, the end of the drainage hole 4 is connected to the outside of the scrap steel package block 1, and the drainage hole 4 is connected to the connecting hole 3. The drainage hole 4 is used to introduce the molten steel outside the scrap steel package block 1 into the connecting hole 3.

[0073] The bottom of the mold 2 used in this embodiment is provided with a drainage hole pressing block 27 , one end of the drainage hole pressing block 27 is connected to the connecting hole pressing block 26 , and the other end extends to the side of the mold 2 .

[0074] Both Example 2 and Example 3 are provided with a structural drainage hole 4 for introducing molten steel, wherein Example 2 can be applied to scrap steel packages with only a single closed cavity, or independent drainage holes 4 can be provided for some or all of the closed cavities when multiple closed cavities are provided. In addition, the path length of the drainage hole 4 can be determined according to the optimal time for the molten steel to contact the fuel. If the molten steel and the fuel need to contact as early as possible, a shorter drainage hole 4 can be selected; if the molten steel and the fuel need to contact later, a longer drainage hole 4 can be selected. The proposals of Example 2 and Example 3 can effectively control the time point of the contact reaction between the molten steel and the fuel, and avoid the inability to accurately control the time point of the reaction between the molten steel and the fuel due to the different wall thicknesses and sizes of the scrap steel packages.

[0075] The following table shows the smelting conditions of the metal packages of Comparative Example 1 and Examples 1 to 3 (the values ​​in the following table are the average values ​​of the melting time of 4 identical packages)

[0076] Example Metal pack melting time Comparative Example 1 280s Example 1 260s Example 2 220s Example 3 220s

[0077] Comparative Example 1 and Example 1 need to wait for the molten steel to melt the outer wall of the scrap steel package before the molten steel can contact and react with the fuel, so it takes a long time to melt.

[0078] In Example 2 and Example 3, a drainage hole 4 is additionally provided to allow the molten steel to enter the closed cavity in advance, thereby accelerating the speed at which the molten steel melts the scrap steel packages.

[0079] The scrap steel packing block in the utility model is designed without a through-hole structure. Since the hardness of the raw materials used for the scrap steel packing block may be relatively large, not all scrap steel packing blocks have enough deformation space to suppress the through-hole structure, and the closed cavity that can be used to add fuel is a more important structure. Therefore, when the scrap steel packing block is small in size or the raw material is relatively hard, it may only be possible to choose to press out the closed cavity and give up the pressing of the through-hole structure. Therefore, the utility model is more suitable for scrap steel packing blocks without a through-hole structure.

[0080] It should be noted that, in the description of the utility model, the terms "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the description of the structure of the utility model shown in the accompanying drawings, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0081] The "first" and "second" in this technical solution are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have a ranking, comparison of size, or other meanings.

[0082] In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two structures. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood based on the overall idea of ​​the utility model and the specific context of the scheme.

Claims

1. A connected scrap steel packing block structure, comprising a scrap steel packing block with holes (1), wherein the scrap steel packing block with holes (1) is provided with a closed cavity for filling fuel, and the number of the closed cavities is at least two, and the characteristics are: The closed chambers are connected to each other via a connecting hole (3), and the connecting hole (3) is used to introduce molten steel in a closed chamber into other closed chambers during the steelmaking process of the perforated scrap steel package (1).

2. The interconnected scrap steel packaging block structure according to claim 1, characterized in that: The invention comprises a drainage hole (4), the end of which is communicated with the outside of the scrap steel package (1), the drainage hole (4) being connected to one of the closed cavity and the communicating hole (3), and the drainage hole (4) being used to guide molten steel outside the scrap steel package (1) into one of the closed cavity and the communicating hole (3).

3. The interconnected scrap steel packaging block structure according to claim 1, characterized in that: The cross section of the communicating hole (3) is one of a semicircular hole and a circular hole.

4. A connected scrap steel packing block structure according to any one of claims 1 to 3, characterized in that: The scrap steel package block (1) comprises an upper scrap steel package block (11) and a lower scrap steel package block (12); The bottom of the upper half (11) of the scrap steel packing block and the top of the lower half (12) of the scrap steel packing block are both provided with closed cavities, and the closed cavities at the bottom of the upper half (11) of the scrap steel packing block and the closed cavities at the top of the lower half (12) of the scrap steel packing block correspond to each other in position and can be combined into a closed cavity; The left and right sides of the bottom of the upper half (11) of the scrap steel packaging block are respectively provided with a mounting groove A (111) and a mounting block A (112), and the left and right sides of the top of the lower half (12) of the scrap steel packaging block are respectively provided with a mounting block B (121) and a mounting groove B (122), and the mounting groove A (111) and the mounting block A (112) can be respectively matched and connected with the mounting block B (121) and the mounting groove B (122).

5. A manufacturing mold for a connected scrap steel packaging block structure according to claim 4, characterized in that: The bottom of the mold (2) is provided with a mounting block pressing groove (21), a closed cavity pressing block, a mounting groove pressing block (22) and a connecting hole pressing block (26); The mounting block pressing groove (21) is used to press the mounting groove A (111) and the mounting groove B (122); The closed cavity pressing block is used to press the closed cavity groove; The communicating hole pressing block (26) is used to press the communicating hole (3).

6. The manufacturing mold for a connected scrap steel packing block structure according to claim 5, characterized in that: A drainage hole pressing block (27) is provided at the bottom of the mold (2), one end of the drainage hole pressing block (27) is connected to one of the communicating hole pressing block (26) and the closed cavity pressing block, and the other end extends to the side of the mold (2).

Images