A356.2 aluminum alloy silicon element groove front smelting matching device

Abstract

The invention discloses an A356.2 aluminum alloy silicon element tank front smelting matching device which comprises a two-man ladle, a material adding device, a batching silicon preheating device and a mixing and stirring device, and the material adding device, the batching silicon preheating device and the mixing and stirring device are independently matched with a two-man ladle manhole of the two-man ladle for use. The material adding device comprises a hopper, a material pouring turning plate, a discharging device, a hopper tip, a discharging opening and a hanging ring. The ingredient silicon preheating device comprises a burner, an air pipeline, a gas pipeline, an air fan and a gas heating control cabinet; the mixing and stirring device comprises a driving motor, a transmission belt, a control cabinet, a rack, a locking bolt, a transmission shaft and a graphite rotor. By applying the matching device for adding the silicon element in front of the electrolytic bath provided by the invention, the adjustment and optimization of the silicon element dosing procedure are realized, the service life of a lining of a smelting furnace is prolonged, and the energy consumption of a smelting dosing process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy smelting, and in particular to a pre-tank smelting matching device for silicon element in A356.2 aluminum alloy. Background Art

[0002] A356.2 aluminum alloy is a typical ternary alloy of Al-Si-Mg series. It is widely used in automobile wheel manufacturing due to its good plasticity, high stamping toughness and heat treatment performance. The main element ratio of A356.2 aluminum alloy is 0.3%-0.45% magnesium, 6.5%-7.5% silicon and 0.12% iron. The furnace temperature is required to be controlled at 760℃ before smelting.

[0003] The main process flow of A356.2 batching is: A supply of raw aluminum liquid → B analysis of aluminum liquid before furnace → C raw aluminum liquid into furnace → D adding silicon ingot, high temperature melting for 1 hour → E adding solid material to cool down → F adding magnesium ingot → G stirring for 20 minutes → H sampling analysis → I refining for 30 minutes → J slag removal → K standing for 30 minutes production. The traditional process flow has fully met the production of A356.2 aluminum alloy products with stable quality, but in the actual production process, its process arrangement still faces the following drawbacks: (1) Directly adding silicon in batches to the melting furnace will result in a long time for high temperature control of melting, and the energy consumption of natural gas, electricity, etc. will inevitably increase; (2) In the actual melting production process, slag and impurities will adhere to the bottom and wall of the furnace, and the melting furnace needs to be cleaned regularly, which increases the workload; (3) Adding silicon in batches to the melting furnace at one time will accelerate the formation of precipitation, increasing the risk of damage to the melting furnace lining due to frequent cleaning. Summary of the invention

[0004] The purpose of the present invention is to provide a supporting device for pre-tank smelting of silicon element in A356.2 aluminum alloy to solve the problems mentioned in the background technology: directly adding silicon in batches to the smelting furnace leads to a long high-temperature smelting control time, and the energy consumption of natural gas, electricity, etc. is bound to increase; slag and impurities will adhere to the furnace bottom and furnace walls, which need to be cleaned regularly; adding silicon in batches to the smelting furnace at one time will accelerate the formation of precipitation, increasing the risk of damage to the lining of the smelting furnace due to frequent cleaning.

[0005] The present invention adopts the following technical solution:

[0006] The present invention discloses a pre-tank smelting supporting device for silicon element in A356.2 aluminum alloy, comprising a ladle, a material adding device, a silicon preheating device and a mixing and stirring device. The material adding device, the silicon preheating device and the mixing and stirring device are all used separately in conjunction with a ladle manhole of the ladle.

[0007] The material adding device comprises a hopper, a hopper tip is provided at the bottom of the hopper, a discharge port is provided on one side wall of the hopper tip, the discharge port is aligned and matched with the bag lifting manhole, a material dumping flap is movably connected to the bottom of the hopper tip, the material dumping flap is matched with the material dumping port cover, a discharge device is provided at the hopper tip, and the discharge device is press-fitted with the material dumping flap;

[0008] The batch silicon preheating device comprises an air blower and a gas heating control cabinet, the air blower is connected to the burner through an air pipeline, the gas heating control cabinet is connected to the burner through a gas pipeline, and the burner is connected to the bag lifting manhole;

[0009] The mixing and stirring device includes a frame, which is buckled with the manhole cover of the ladle. A driving motor and a transmission shaft are arranged on the frame. The driving motor is connected to the transmission shaft through a transmission belt. A graphite rotor is arranged at the end of the transmission shaft. The transmission shaft and the graphite rotor are arranged in the ladle.

[0010] Furthermore, a hanging ring is provided on the hopper; and a hopper grip is provided on the side wall of the tip of the hopper.

[0011] Furthermore, the unloading device has a U-shaped structure, and includes a rotating rod, which is rotatably arranged inside the tip of the hopper, and one end of the rotating rod is provided with a short locking handle fixedly connected at a right angle, and the short locking handle is press-fitted with the unloading flap, and an unloading handle is provided on the end of the rotating rod away from the short locking handle, and the unloading handle is arranged on the outer side of the side wall of the tip of the hopper.

[0012] A rotating sleeve is arranged in the tip of the hopper, and the rotating rod cooperates with the rotating sleeve.

[0013] Furthermore, the material dumping flap is hingedly connected to the bottom of the hopper tip.

[0014] Furthermore, rollers are provided below the air blower and the gas heating control cabinet.

[0015] Furthermore, the frame is an inverted U-shaped frame structure, and locking bolts are provided at both ends of the U-shaped frame of the frame, and the locking bolts are locked and matched with the side walls of the bag lifting manhole.

[0016] Furthermore, a control cabinet is also arranged on the frame, and the drive motor is controlled by the control cabinet.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The present invention provides a pre-tank smelting supporting device for silicon element in A356.2 aluminum alloy. By adding silicon into each ladle and coordinating heating and stirring, silicon is added in batches before the electrolytic cell and the smelting furnace equipment, avoiding the direct input of silicon into the smelting furnace, effectively reducing energy consumption; reducing the slag and impurities adhering to the furnace bottom and furnace wall, reducing the cleaning workload; there is no need to add silicon in batches to the smelting furnace at one time, avoiding the problem of accelerated precipitation formation and the risk of damage to the lining of the smelting furnace due to frequent cleaning. In summary, the pre-electrolytic cell silicon element addition supporting device provided by the present invention can achieve the adjustment and optimization of the silicon element dosing process, extend the service life of the lining of the smelting furnace, and reduce the energy consumption of the smelting batching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 This is a front view of the A356.2 aluminum alloy silicon element front tank smelting supporting device of the present invention;

[0021] Figure 2 This is a front view of the material adding device of the A356.2 aluminum alloy silicon element front tank smelting supporting device of the present invention;

[0022] Figure 3 It is a side view of the material adding device of the A356.2 aluminum alloy silicon element front tank smelting supporting device of the present invention;

[0023] Figure 4 This is a diagram showing the supporting use of the material adding device of the present invention;

[0024] Figure 5 This is a diagram showing the effect of using the preheating device for silicon ingredients of the present invention in conjunction with other devices;

[0025] Figure 6 It is a schematic diagram of the structure of the mixing and stirring device of the present invention;

[0026] Figure 7 This is a diagram showing the effect of the use of the mixing and stirring device of the present invention.

[0027] Explanation of the accompanying drawings: 1. Material adding device; 1-1. Lifting ring; 1-2. Hopper; 1-3. Hopper grip; 1-4. Discharge flap; 1-5. Discharge device; 1-5-1. Discharge handle; 1-5-2. Locking short handle; 1-5-3. Rotating rod; 1-5-4. Rotating sleeve; 1-6. Hopper tip; 1-7. Discharge port; 2. Silicon preheating device; 2-1. Burner; 2-2. Air duct; 2-3. Gas duct; 2-4. Air fan; 2-5. Gas heating control cabinet; 3. Mixing and stirring device; 3-1. Drive motor; 3-2. Drive belt; 3-3. Control cabinet; 3-4. Frame; 3-5. Locking bolt; 3-6. Drive shaft; 3-7. Graphite rotor; 4. Lifting bag; 4-1. Lifting bag manhole; 4-2. Exhaust hole. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, this embodiment discloses a pre-tank smelting supporting device for silicon element in A356.2 aluminum alloy, including a ladle 4. It also includes a material adding device 1, a silicon preheating device 2 and a mixing and stirring device 3, and the material adding device 1, the silicon preheating device 2 and the mixing and stirring device 3 are all used separately in conjunction with the ladle manhole 4-1 of the ladle 4.

[0030] like Figures 2 to 4 As shown, the material adding device 1 includes a hopper 1-2, a hopper tip 1-6 is provided at the bottom of the hopper 1-2, a discharge port 1-7 is opened on one side wall of the hopper tip 1-6, the discharge port 1-7 is aligned and matched with the bag lifting manhole 4-1, a dumping flap 1-4 is movably connected to the bottom of the hopper tip 1-6, the dumping flap 1-4 is matched with the discharge port 1-7 cover, and a discharge device 1-5 is provided on the hopper tip 1-6, and the discharge device 1-5 is pressed and matched with the dumping flap 1-4.

[0031] In this embodiment, a lifting ring 1-1 is provided on the hopper 1-2, and the lifting ring 1-1 is convenient for lifting the device. A hopper grip 1-3 is provided on the side wall of the hopper tip 1-6, and the hopper grip 1-3 is convenient for stabilizing the hopper 1-2 when lifting the device.

[0032] In this embodiment, the unloading device 1-5 is in a U-shaped structure, and the unloading device 1-5 includes a rotating rod 1-5-3, which is rotatably arranged inside the hopper tip 1-6, and one end of the rotating rod 1-5-3 is provided with a right-angle fixedly connected lock short handle 1-5-2, which is press-fitted with the unloading flap 1-4, and an unloading handle 1-5-1 is provided on the end of the rotating rod 1-5-3 away from the lock short handle 1-5-2, and the unloading handle 1-5-1 is arranged on the outer side of the side wall of the hopper tip 1-6 opposite to the unloading flap 1-4. In this embodiment, the unloading flap 1-4 is hingedly connected to the bottom of the hopper tip 1-6.

[0033] A rotating sleeve 1-5-4 is arranged in the side wall of the tip 1-6 of the hopper above the dumping flap 1-4, another rotating sleeve 1-5-4 is arranged in the side wall of the tip 1-6 of the hopper on the opposite side of the dumping flap 1-4, and a rotating rod 1-5-3 is rotatably arranged in the two rotating sleeves 1-5-4. Before loading, the dumping flap 1-4 is pushed up to cover the discharge port 1-7, and the dumping handle 1-5-1 is rotated at the same time, so that the locking short handle 1-5-2 presses the dumping flap 1-4. When it is necessary to unload, the dumping handle 1-5-1 is rotated again so that the locking short handle 1-5-2 leaves the dumping flap 1-4, and the dumping flap 1-4 opens and flips downward under the pressure of its own gravity and the internal materials, and the materials can flow out.

[0034] like Figure 5 As shown, the batch silicon preheating device 2 includes an air fan 2-4 and a gas heating control cabinet 2-5, the air fan 2-4 is connected to the burner 2-1 through an air pipeline 2-2, the gas heating control cabinet 2-5 is connected to the burner 2-1 through a gas pipeline 2-3, and the burner 2-1 is connected to the bag lifting manhole 4-1. Rollers are arranged below the air fan 2-4 and the gas heating control cabinet 2-5.

[0035] like Figure 6 and Figure 7 As shown, the mixing and stirring device 3 includes a frame 3-4, which is buckled with the cover of the bag lifting manhole 4-1. The frame 3-4 is provided with a driving motor 3-1 and a transmission shaft 3-6. The driving motor 3-1 is connected to the transmission shaft 3-6 through a transmission belt 3-2. The end of the transmission shaft 3-6 is provided with a graphite rotor 3-7, and the transmission shaft 3-6 and the graphite rotor 3-7 are arranged in the bag lifting 4. A control cabinet 3-3 is also arranged on the frame 3-4, and the driving motor 3-1 is controlled by the control cabinet 3-3. The frame 3-4 is an inverted U-shaped frame structure, and locking bolts 3-5 are arranged at both ends of the U-shaped frame of the frame 3-4. The locking bolts 3-5 are locked with the side walls of the bag lifting manhole 4-1. After the transmission shaft 3-6 is inserted into the bag lifting manhole 4-1, the frame 3-4 is buckled on the bag lifting manhole 4-1, and the mixing and stirring device 3 can be fixed by tightening the locking bolts 3-5.

[0036] like Figures 1 to 7 As shown, the action process of the present invention is as follows:

[0037] 1. Material adding device 1 operation process

[0038] (1) Configure an electronic hook scale that meets the requirements of weighing accuracy, and operate the overhead crane to lift the adding device through the lifting ring 1-2.

[0039] (2) Add silicon to hopper 1-2 and stop adding after reaching the matching weight.

[0040] (3) Operate the overhead crane to lift the material adding device 1 to the designated bag lift 4. The operator maintains the overall stability of the material adding device 1 by holding the hopper grip 1-3 and fully aligns the discharge port 1-7 with the bag lift manhole 4-1.

[0041] (4) Confirm that the alignment is accurate and manually turn the unloading handle 1-5-1. At this time, the unloading flap 1-4 is opened, the material in the hopper 1-2 is released, and all the silicon is added to the lifting bag 4.

[0042] 2. Operation process of batching silicon preheating device 2

[0043] (1) Move the batch silicon preheating device 2 to one side of the designated ladle lifting manhole 4-1, and install the burner 2-1 on the ladle lifting manhole 4-1.

[0044] (2) Check the tightness of the burner 2-1 and the bag lifting manhole 4-1, and open the bag lifting exhaust hole 4-2 to discharge excess air and combustion exhaust gas.

[0045] (3) Connect the air pipeline 2-2, the gas pipeline 2-3, and the power supply.

[0046] (4) Check the gas pressure, drain the pipeline and test the gas concentration of gas pipeline 2-3.

[0047] (5) Start air fans 2-4 and keep them running for 3-5 minutes after confirming they are normal.

[0048] (6) Ignite and preheat the inner lining of ladle 4 and the silicon batching, and quickly raise the temperature to 350-400°C.

[0049] (7) The aluminum liquid is sucked out normally using the lifting bag 4. During the slightly boiling state and the flushing process of sucking out the aluminum liquid, the silicon ingredient is initially melted.

[0050] 3. Operation process of mixing and stirring device 3

[0051] (1) Use a crane to lift the mixing and stirring device 3 and lower it vertically along the ladle manhole 4-1 to prevent the transmission shaft 3-6 and the graphite rotor 3-7 from colliding with the ladle 4.

[0052] (2) The frame 3 - 4 is installed on the bag lifting manhole 4 - 1 , and the sealing condition of the frame 3 - 4 and the bag lifting manhole 4 - 1 is confirmed, and then the locking bolts 3 - 5 are manually tightened to complete the positioning and installation work of the mixing and stirring device 3 .

[0053] (3) The equipment is powered on and the speed is adjusted using the control cabinet 3-3. After completion, the drive motor 3-1 is started and the graphite rotor 3-7 rotates in the aluminum liquid in the ladle 4 to further dissolve the silicon.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A pre-tank smelting supporting device for A356.2 aluminum alloy silicon, comprising a ladle (4), characterized in that: It also includes a material adding device (1), a silicon preheating device (2) and a mixing and stirring device (3), wherein the material adding device (1), the silicon preheating device (2) and the mixing and stirring device (3) are all used separately in conjunction with a bag manhole (4-1) of a bag lift (4); The material adding device (1) comprises a hopper (1-2), the bottom of the hopper (1-2) is provided with a hopper tip (1-6), a side wall of the hopper tip (1-6) is provided with a discharge port (1-7), the discharge port (1-7) is aligned and matched with the bag lifting manhole (4-1), the bottom of the hopper tip (1-6) is movably connected with a material dumping flap (1-4), the material dumping flap (1-4) is sealed and matched with the discharge port (1-7), the hopper tip (1-6) is provided with a discharge device (1-5), and the discharge device (1-5) is press-fitted with the material dumping flap (1-4); The batch silicon preheating device (2) comprises an air blower (2-4) and a gas heating control cabinet (2-5); the air blower (2-4) is connected to the burner (2-1) via an air pipeline (2-2); the gas heating control cabinet (2-5) is connected to the burner (2-1) via a gas pipeline (2-3); and the burner (2-1) is connected to the bag lifting manhole (4-1); The mixing and stirring device (3) comprises a frame (3-4), the frame (3-4) is buckled with the cover of the ladle manhole (4-1), a driving motor (3-1) and a transmission shaft (3-6) are arranged on the frame (3-4), the driving motor (3-1) is connected to the transmission shaft (3-6) through a transmission belt (3-2), a graphite rotor (3-7) is arranged at the end of the transmission shaft (3-6), and the transmission shaft (3-6) and the graphite rotor (3-7) are arranged in the ladle (4).

2. The A356.2 aluminum alloy silicon element pre-tank smelting supporting device according to claim 1 is characterized in that: The hopper (1-2) is provided with a lifting ring (1-1); A hopper gripper (1-3) is provided on the side wall of the hopper tip (1-6).

3. The A356.2 aluminum alloy silicon element pre-tank smelting supporting device according to claim 1 is characterized in that: The unloading device (1-5) is in a U-shaped structure, comprising a rotating rod (1-5-3), the rotating rod (1-5-3) being rotatably arranged inside the tip of the hopper (1-6), one end of the rotating rod (1-5-3) being provided with a locking short handle (1-5-2) fixedly connected at a right angle, the locking short handle (1-5-2) being press-fitted with the unloading flap (1-4), and an unloading handle (1-5-1) being provided at one end of the rotating rod (1-5-3) away from the locking short handle (1-5-2), the unloading handle (1-5-1) being arranged on the outer side of the side wall of the tip of the hopper (1-6); A rotating sleeve (1-5-4) is arranged inside the hopper tip (1-6), and the rotating rod (1-5-3) is rotationally matched with the rotating sleeve (1-5-4).

4. The A356.2 aluminum alloy silicon element pre-tank smelting supporting device according to claim 1 is characterized in that: The material dumping flap (1-4) is hingedly connected to the bottom of the hopper tip (1-6).

5. The A356.2 aluminum alloy silicon element pre-tank smelting supporting device according to claim 1 is characterized in that: Rollers are arranged below the air fan (2-4) and the gas heating control cabinet (2-5).

6. The A356.2 aluminum alloy silicon element pre-tank smelting supporting device according to claim 1 is characterized in that: The frame (3-4) is an inverted U-shaped frame structure, and locking bolts (3-5) are arranged at both ends of the U-shaped frame of the frame (3-4), and the locking bolts (3-5) are locked and matched with the side walls of the bag lifting manhole (4-1).

7. The A356.2 aluminum alloy silicon element pre-tank smelting supporting device according to claim 1 is characterized in that: A control cabinet (3-3) is also provided on the frame (3-4), and the drive motor (3-1) is controlled by the control cabinet (3-3).

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