A casting residual steel slag pretreatment device

Abstract

The present application relates to steel slag treatment technical field, especially cast remaining steel slag pretreatment device, including the slag pool and the drain pipe of setting in the bottom side of the slag pool, still including the protective cover and the smoke pipe of setting in the top of the protective cover, the water supply pipe is still set in the protective cover, one end of the water supply pipe extends to the inner chamber of the protective cover, the spray auxiliary mechanism is still set in the protective cover, the spray auxiliary mechanism provides a cleaning effect to the spray head, before water is injected, the protective cover is needed to cover the slag pool to avoid the smoke produced during the water injection work to scatter, the lifting ring part is set in the top of the protective cover, that is, the protective cover is controlled to move through the lifting equipment, the protective cover blocks the top pool mouth of the slag pool through the lifting equipment, then water is transported through the water supply pipe, finally, the spray head is sprayed, multiple spray heads arranged in an array improve the spray water injection range to improve the uniformity of the water and the steel slag contact.

Description

Technical Field

[0001] This invention relates to the field of steel slag treatment technology, and in particular to a pretreatment device for foundry waste steel slag. Background Technology

[0002] In the steel casting process, the steel slag produced needs to be recycled and reused to improve the economic efficiency of steel use. Among them, steel slag pretreatment is a key process to convert high-temperature molten steel slag into room-temperature granular slag, laying the foundation for subsequent resource utilization.

[0003] A common pretreatment method is the hot quenching method, in which steel slag is poured into a sealed tank and water is added for reaction. Free calcium oxide (f-CaO) reacts with water to generate calcium hydroxide, which pulverizes the steel slag. This method consumes a large amount of water (about 500 kg of water per ton of slag), but the treated steel slag has good fluidity and can be used as a raw material for building materials.

[0004] When steel slag enters the slag-sealing tank, cooling and slag boiling are achieved by adding water. After the slag boiling is completed, the liquid is discharged through a drainage system located at the bottom of the slag-sealing tank, thus completing the transformation of the steel slag into room-temperature granular slag. During this process, on the one hand, directly adding water to the slag-sealing tank results in poor uniformity of contact between the water and the steel slag; on the other hand, when water comes into contact with the steel slag for cooling, it generates flue gas, which pollutes the working environment and requires centralized emission treatment.

[0005] Therefore, this invention proposes a pretreatment device for residual steel slag in casting to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a pretreatment device for residual steel slag in casting, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pretreatment device for residual steel slag in casting, comprising a slag-sealing tank and a drainage pipe disposed at the bottom of the slag-sealing tank; further comprising a protective cover and a smoke exhaust pipe disposed at the top of the protective cover, wherein a conveying hose is disposed at one end of the smoke exhaust pipe;

[0008] The protective cover is also equipped with a water supply pipe. One end of the water supply pipe extends into the inner cavity of the protective cover and is connected to the support pipe. The other end of the water supply pipe is located on the outside of the protective cover and is connected to the connecting hose. A lifting ring is also provided on the top of the protective cover.

[0009] The support pipe is frame-shaped, and load-bearing pipes are equidistantly arranged inside the support pipe, with spray heads equidistantly arranged on the bottom side of the load-bearing pipes.

[0010] The protective cover also includes a spray auxiliary mechanism that provides a cleaning function for the spray heads.

[0011] Preferably, the spraying auxiliary mechanism includes a servo motor disposed outside the protective cover. The servo motor is connected to a drive sprocket, which is engaged with a transmission chain, and the transmission chain is connected to the drive sprocket.

[0012] Preferably, the spraying auxiliary mechanism further includes a support rod, and support heads are connected to both ends of the support rod through an installation structure;

[0013] The support head has two sets symmetrically arranged at both ends of the bearing rod. A connecting shaft is fixedly installed at one end of the support head. The connecting shaft at the end of one support head is fixedly connected to the transmission sprocket, and the connecting shaft at the end of the other support head is inserted into the protective cover.

[0014] Preferably, the mounting structure is used for assembling and disassembling the support rod. The mounting structure includes a positioning slot, which is provided on one side of the support head, and a mounting screw groove is provided in the positioning slot.

[0015] The positioning slot is compatible with the positioning head and the two are engaged to quickly position the support rod. The positioning head also has a through groove for installation and is fixed by fastening screws.

[0016] Preferably, the bearing rods are positioned corresponding to the bearing pipes and are arranged in the same number of groups, with the bearing rods positioned directly below the bearing pipes.

[0017] Preferably, the spray auxiliary mechanism further includes an auxiliary component mounted on the support rod. The auxiliary component is used to clean impurities adhering to the nozzle of the spray head to prevent clogging.

[0018] Preferably, the auxiliary component includes a support plate, one end of which is fixedly mounted on the outer wall of the support rod and arranged in a ring at equal intervals. The support plates arranged in a ring at equal intervals form a group, and are then arranged at equal intervals on the support rod. The positions of the support plates and the spray heads on the bottom side of the support pipe are corresponding.

[0019] Preferably, an arc-shaped groove is provided at the other end of the support plate, and a limit slot is provided at the bottom of the arc-shaped groove; a mounting screw groove is provided on the end face of the support plate.

[0020] The curved groove is used to install curved strips.

[0021] Preferably, side ends are symmetrically fixed at both ends of the arc-shaped strip. The arc-shaped strip is placed in the arc-shaped groove, and the side ends at both ends of the arc-shaped strip are attached to the end face of the support plate and then fixed with screws.

[0022] Preferably, a limiting plug is fixedly provided at the center of the bottom side of the outer arc surface of the arc strip. The limiting plug is adapted to the limiting slot at the bottom of the arc groove to provide a quick positioning for the arc strip.

[0023] A cleaning brush body is provided on the inner arc-shaped surface of the arc-shaped strip, and the cleaning brush body is set in an arc shape.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The pretreatment device for residual steel slag in casting designed in this invention requires a protective cover to be used to cover the slag-filling pool before water is injected to prevent the flue gas generated during water injection from spreading. A lifting ring is installed on the top of the protective cover, which is moved by a lifting device. The protective cover seals the top opening of the slag-filling pool with the lifting device. Water is then transported through a water pipe, and the water flows to the supporting pipe and the bearing pipe. Finally, it is sprayed through spray heads. The array of multiple spray heads increases the spraying range to improve the uniformity of water contact with the steel slag.

[0026] Meanwhile, the fumes generated when the sprayed water comes into contact with the steel slag will not disperse under the protection of the protective cover, which helps to protect the on-site construction environment. Moreover, by installing a smoke exhaust pipe at the top of the protective cover, the generated fumes can be discharged in a concentrated manner and then purified before being released.

[0027] Based on this, when the generated flue gas rises and is discharged from the exhaust pipe, the impurities and particles in the flue gas will also adhere to the nozzles of the spray head. In order to prevent the particulate impurities from clogging the nozzles of the spray head and affecting the spraying effect during long-term operation, this solution also sets up a spraying auxiliary mechanism in the protective cover to provide a cleaning effect for the nozzles of the spray head, that is, to avoid spraying blockage and ensure the smooth operation of the spraying. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the front connection of the pretreatment device for casting residual steel slag of the present invention;

[0029] Figure 2 This is a schematic diagram of the rear connection of the pretreatment device for casting residual steel slag of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure connection of the protective cover of the present invention;

[0031] Figure 4 for Figure 3 Enlarged schematic diagram of the structural connection at point A in the middle;

[0032] Figure 5 This is a schematic diagram showing the connection between the spray auxiliary mechanism and the protective cover structure of the present invention;

[0033] Figure 6 for Figure 5 Enlarged schematic diagram of the structural connection at point B;

[0034] Figure 7 This is a schematic diagram showing the connection between the support rod and the auxiliary component structure of the present invention;

[0035] Figure 8 for Figure 7 Enlarged schematic diagram of the structural connection at point C;

[0036] Figure 9 for Figure 7 Enlarged schematic diagram of the structural connection at point D.

[0037] In the diagram: 1. Slag tank; 2. Drainage pipe; 3. Protective cover; 4. Smoke exhaust pipe; 5. Conveying hose; 6. Water supply pipe; 7. Connecting hose; 8. Supporting pipe body; 81. Bearing fitting; 82. Spray head; 901. Servo motor; 902. Drive sprocket; 903. Transmission chain; 904. Transmission sprocket; 905. Connecting shaft; 906. Support head; 907. Bearing rod; 1001. Positioning slot; 1002. Positioning head; 1003. Installation through slot; 1004. Fastening screw; 1101. Support plate; 1102. Arc groove; 1103. Limiting slot; 1104. Arc strip; 1105. Side head; 1106. Cleaning brush body. Detailed Implementation

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figures 1-9 A pretreatment device for residual steel slag in casting includes a slag-sealing tank 1 and a drain pipe 2 disposed at the bottom of the slag-sealing tank 1; it also includes a protective cover 3 and a smoke exhaust pipe 4 disposed at the top of the protective cover 3, and a conveying hose 5 is provided at one end of the smoke exhaust pipe 4.

[0040] The protective cover 3 is also equipped with a water supply pipe 6. One end of the water supply pipe 6 extends into the inner cavity of the protective cover 3 and is connected to the support pipe body 8. The other end of the water supply pipe 6 is located outside the protective cover 3 and is connected to the connecting hose 7. A lifting ring is also provided on the top of the protective cover 3.

[0041] The support pipe body 8 is frame-shaped, and the inner side of the support pipe body 8 is provided with bearing pipes 81 at equal intervals. Spray heads 82 are provided at equal intervals on the bottom side of the bearing pipes 81. The protective cover 3 is also provided with a spray auxiliary mechanism, which provides a cleaning function for the spray heads 82.

[0042] From the appendix Figure 1-6 As shown, in this scheme, after the steel slag is poured into the slag-filling tank 1, before water is injected into it, a protective cover 3 is needed to cover the slag-filling tank 1 to prevent the flue gas generated during water injection from spreading. A lifting ring is installed on the top of the protective cover 3, that is, the protective cover 3 is moved by the lifting equipment. The protective cover 3 seals the top opening of the slag-filling tank 1 by the lifting equipment. Then, water is transported through the water pipe 6. The water flows to the support pipe 8 and the bearing pipe 81. Finally, it is sprayed through the spray head 82. The array of multiple spray heads 82 increases the spray water injection range to improve the uniformity of water contact with steel slag.

[0043] Meanwhile, the fumes generated when the sprayed water comes into contact with the steel slag will not disperse under the protection of the protective cover 3, which helps to protect the on-site construction environment. Moreover, by setting the exhaust pipe 4 at the top of the protective cover 3, the generated fumes can be discharged in a concentrated manner and then discharged after purification treatment. After the steel slag is cooled and boiled, the water is discharged through the drain pipe 2, and then the protective cover 3 is removed by hoisting equipment to transfer the material in the slag-sealing pool 1 to the next processing step.

[0044] From the appendix Figure 3-6 It is known that after the sprayed water comes into contact with the steel slag in the slag-filling tank 1, the generated flue gas will be discharged from the exhaust pipe 4. However, since the spray head 82 located on the bottom side of the bearing pipe 81 sprays downwards, when the generated flue gas rises and is discharged from the exhaust pipe 4, the impurity particles in the flue gas will also adhere to the nozzle of the spray head 82. In order to avoid the particulate impurities from clogging the nozzle of the spray head 82 and affecting the spraying effect during long-term operation, this solution also sets up a spraying auxiliary mechanism in the protective cover 3 to solve this problem.

[0045] The servo motor 901 in the spray auxiliary mechanism is connected to the drive sprocket 902, which is meshed with the transmission chain 903, and the transmission chain 903 is connected to the transmission sprocket 904. The spray auxiliary mechanism also includes a support rod 907, with support heads 906 connected to both ends of the support rod 907 via an installation structure. Two sets of support heads 906 are symmetrically arranged at both ends of the support rod 907, and a connecting shaft 905 is fixedly installed at one end of the support head 906. The connecting shaft 905 at one end of the support head 906 is connected to the transmission chain 904. The sprocket 904 is fixedly connected, and the connecting shaft 905 at the end of the other support head 906 is inserted into the protective cover 3; that is, the servo motor 901 drives the drive sprocket 902, which in turn drives the transmission chain 903 to mesh and transmit power. The transmission chain 903 then drives each transmission sprocket 904 to move. A rotating shaft is provided on one side of each transmission sprocket 904, which is inserted into the protective cover 3 to support the transmission sprocket 904. The transmission sprocket 904 then drives the bearing rods 907 at each position to rotate.

[0046] Combined with the appendix Figure 7-9 As shown, the support head 906 and the bearing rod 907 are connected by an installation structure, which includes a positioning slot 1001. The positioning slot 1001 is located on one side of the support head 906 and has a mounting screw groove. The positioning slot 1001 is adapted to engage with a positioning head 1002 for quick positioning of the bearing rod 907. An installation through slot 1003 is also provided in the positioning head 1002, which is fixed by fastening screws 1004. The bearing rod 907 and the bearing pipe 81 are positioned correspondingly and assembled. The same number of bearing rods 907 are positioned directly below the bearing pipe 81. The bearing rod 907 is designed to be detachable for easy future connection, maintenance, or replacement. For the installation of the bearing rod 907, firstly, the positioning clips 1002 at both ends of the bearing rod 907 are engaged with the positioning slots 1001 on the support head 906. Then, the fastening screws 1004 are passed through the mounting slots 1003 in the positioning clips 1002 and finally threaded into the screw grooves at the bottom of the positioning slots 1001. This completes the fixing of the positioning clips 1002, thus completing the installation of the bearing rod 907.

[0047] This solution also includes an auxiliary component on the support rod 907, used to clean impurities adhering to the nozzles of the spray heads 82 to prevent clogging. This auxiliary component includes a support plate 1101, one end of which is fixed to the outer wall of the support rod 907 and arranged in a ring at equal intervals. These ring-shaped support plates 1101 form a group, and are further equally spaced on the support rod 907. The support plates 1101 correspond to the positions of the spray heads 82 on the bottom side of the support pipe 81. The purpose of the support plate 1101 is twofold: firstly, to provide mounting support for the curved strip 1104; and secondly, to provide support for the spray heads 82. The water sprayed from the spray head 82 provides a dispersing effect, further increasing the spray range and actively assisting in the cooling of steel slag. When the spray head 82 is working, the servo motor 901 drives the drive sprocket 902, transmission chain 903, and transmission sprocket 904 to rotate, ultimately causing the support rods 907 at each position to rotate. The rotation of the support rods 907 causes the support plate 1101 mounted on them to move, i.e., to perform circular motion. The circular motion of the support plate 1101 provides a slapping effect on the sprayed water, making the sprayed water flow cover a larger range, which has a positive effect on the cooling of steel slag.

[0048] Combined with the appendix Figure 9 The displayed content reveals that this solution features an arc-shaped groove 1102 at the other end of the support plate 1101, with a limiting slot 1103 at the bottom of the groove. A mounting screw groove is provided on the end face of the support plate 1101. The arc-shaped groove 1102 is used to install the arc-shaped strip 1104. Side ends 1105 are symmetrically fixed at both ends of the arc-shaped strip 1104. The arc-shaped strip 1104 is placed in the arc-shaped groove 1102 and is positioned within the arc-shaped groove. The side ends 1105 at both ends of 1104 are fitted with the end faces of the support plate 1101 and then fixed with screws; a limit plug is fixedly installed at the center of the bottom side of the outer arc surface of the arc strip 1104. The limit plug is adapted to the limit slot 1103 at the bottom of the arc groove 1102 to provide a quick positioning for the arc strip 1104; a cleaning brush body 1106 is provided on the inner arc surface of the arc strip 1104. The cleaning brush body 1106 is set in an arc shape.

[0049] When the support plate 1101 rotates, the arc-shaped groove 1102 at the end of the support plate 1101 passes through the nozzle of the spray head 82. In this design, an arc-shaped strip 1104 is provided in the arc-shaped groove 1102 and an arc-shaped cleaning brush 1106 is provided on the inner side of the arc-shaped strip 1104. That is, when the cleaning brush 1106 passes through the nozzle of the spray head 82, the cleaning brush 1106 provides a cleaning effect on the particulate impurities adhering to the nozzle of the spray head 82, so as to avoid the accumulation of particulate impurities in the flue gas at the nozzle of the spray head 82 and provide a protective effect for the spraying operation.

[0050] According to the appendix Figure 9 Combined with the appendix Figure 7-8 As shown, the cleaning brush body 1106 is firstly located on the inner wall of the arc-shaped strip 1104. The arc-shaped strip 1104 is detachably installed in the arc-shaped groove 1102. In this solution, when it is necessary to disassemble and maintain the cleaning brush body 1106 on the local support plate 1101, it is not necessary to disassemble the bearing rod 907. The cleaning brush body 1106 on the local support plate 1101 can be directly disassembled and replaced. The screws fixing the side head 1105 can be released to release the position of the arc-shaped strip 1104. Then the arc-shaped strip 1104 can be taken out from the arc-shaped groove 1102. When cleaning the disassembled cleaning brush body 1106 or replacing it with a new cleaning brush body 1106, firstly, the limiting plug at the bottom of the arc-shaped strip 1104 is inserted into the limiting slot 1103 at the bottom of the arc-shaped groove 1102 to quickly position the arc-shaped strip 1104. Then, it can be fixed with screws.

[0051] When all cleaning brushes 1106 need to be replaced, the support rod 907 should be disassembled first. It is more convenient to disassemble and replace the cleaning brushes 1106 at the ends of each support plate 1101 after removing the support rod 907. First, release the fastening screw 1004 from the positioning clip 1002 to release the installation and fixation of the support rod 907. After removing the support rod 907, the arc strip 1104 in the arc groove 1102 at the end of each support plate 1101 can be disassembled.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for residual steel slag in casting, comprising a slag-sealing tank (1) and a drain pipe (2) disposed on the bottom side of the slag-sealing tank (1); further comprising a protective cover (3) and a smoke exhaust pipe (4) disposed on the top of the protective cover (3), wherein a conveying hose (5) is also provided at one end of the smoke exhaust pipe (4). Its features are: The protective cover (3) is also equipped with a water supply pipe (6). One end of the water supply pipe (6) extends into the inner cavity of the protective cover (3) and is connected to the support pipe (8). The other end of the water supply pipe (6) is located outside the protective cover (3) and is connected to the connecting hose (7). A lifting ring is also provided on the top of the protective cover (3). The support pipe (8) is frame-shaped, and the support pipe (8) is provided with bearing pipes (81) at equal intervals on the inner side, and the bearing pipes (81) are provided with spray heads (82) at equal intervals on the bottom side of the bearing pipes (81). A spraying auxiliary mechanism is also provided in the protective cover (3), which provides a cleaning function for the spray head (82); The spraying auxiliary mechanism includes a servo motor (901) disposed outside the protective cover (3). The servo motor (901) is connected to the drive sprocket (902), the drive sprocket (902) is engaged with the transmission chain (903), and the transmission chain (903) is connected to the transmission sprocket (904). The spraying auxiliary mechanism also includes an auxiliary component, which is mounted on the support rod (907). The auxiliary component is used to clean the impurities adhering to the nozzle of the spray head (82) to prevent it from clogging. The auxiliary component includes a support plate (1101), one end of which is fixedly mounted on the outer wall of the support rod (907) and is arranged in a ring at equal intervals. The support plates (1101) arranged in a ring at equal intervals form a group, and are further arranged at equal intervals on the support rod (907). The support plates (1101) are positioned corresponding to the spray head (82) on the bottom side of the support pipe (81). An arc-shaped groove (1102) is provided at the other end of the support plate (1101), and a limit slot (1103) is provided at the bottom of the arc-shaped groove (1102); a mounting screw groove is provided on the end face of the support plate (1101); The arc-shaped groove (1102) is used to install the arc-shaped strip (1104); A limiting plug is fixedly installed at the center of the bottom side of the outer arc surface of the arc strip (1104). The limiting plug is adapted to the limiting slot (1103) at the bottom of the arc groove (1102) to provide a quick positioning for the arc strip (1104). A cleaning brush body (1106) is provided on the inner arc surface of the arc strip (1104), and the cleaning brush body (1106) is set in an arc shape.

2. The pretreatment device for foundry waste slag according to claim 1, characterized in that: The spraying auxiliary mechanism also includes a support rod (907), and support heads (906) are connected at both ends of the support rod (907) through an installation structure. The support head (906) has two sets of symmetrically arranged at both ends of the bearing rod (907). A connecting shaft (905) is fixedly arranged at one end of the support head (906). The connecting shaft (905) at the end of one support head (906) is fixedly connected to the transmission sprocket (904), and the connecting shaft (905) at the end of the other support head (906) is inserted into the protective cover (3).

3. The pretreatment device for foundry waste slag according to claim 2, characterized in that: The mounting structure is used for the assembly and disassembly of the support rod (907). The mounting structure includes a positioning slot (1001), which is located on one side of the support head (906), and a mounting screw groove is provided in the positioning slot (1001). The positioning slot (1001) is adapted to engage with the positioning head (1002). The engagement is used for quick positioning of the support rod (907). An installation through slot (1003) is also provided in the positioning head (1002). The positioning head (1002) is fixed by a fastening screw (1004).

4. The pretreatment device for foundry waste slag according to claim 3, characterized in that: The bearing rod (907) is positioned corresponding to the bearing pipe (81) and has the same number of sets. The bearing rod (907) is positioned directly below the bearing pipe (81).

5. The pretreatment device for foundry waste slag according to claim 1, characterized in that: Side ends (1105) are symmetrically fixed at both ends of the arc-shaped strip (1104). The arc-shaped strip (1104) is placed in the arc-shaped groove (1102), and the side ends (1105) at both ends of the arc-shaped strip (1104) are attached to the end face of the support plate (1101) and then fixed with screws.

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