A pouring system for continuous casting and extrusion of liquid nonferrous metals and a method of use thereof

Abstract

The pouring system for continuous rheological extrusion of liquid nonferrous metals includes a melting furnace, a holding furnace, a flow channel docking device, a flow channel device, a continuous rheological extruder, a cooling device, a guide frame and a storage device. The melting furnace and the holding furnace are electromagnetic induction furnaces. The bottom of the crucible is provided with a bottom channel, and the bottom channel is opened and closed by a plunger valve. The bottom channel of the crucible is connected to the flow channel device with a heat preservation function through a flow channel docking device. The melting furnace and the holding furnace, as well as the holding furnace and the continuous rheological extruder, are connected through the flow channel device. The cooling device, the guide frame and the storage device are sequentially arranged after the continuous rheological extruder. The beneficial effect is that the problems of unstable pouring temperature and pouring speed in the continuous rheological extrusion production process are solved, and it has the advantages of being able to refine grains, reduce casting defects, shorten the process, and be energy-efficient; strong adaptability, unlimited product length, good quality; small investment, and low production cost.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, in particular to a liquid metal continuous rheological extrusion device for non-ferrous metals and alloys thereof. Background Art

[0002] Continuous rheological extrusion is the most advanced short-process production process in semi-solid forming technology. It can reduce forming defects while refining grains. Since it is a direct forming of semi-solid slurry, it has the advantages of high efficiency and energy saving, good product performance, strong adaptability, product diversification, low production cost and a wide range of alloys suitable for semi-solid processing. At the same time, there are few oxidation inclusions in the processing process, and the recycling and use of waste can be completed in the same workshop. It combines the advantages of liquid forming and plastic processing and is considered to be one of the most promising metal rheological forming technologies in the 21st century. The traditional continuous extrusion technology of solid billets is to heat the solid billet to a molten state first, and then transfer it to a continuous rheological extruder after melting. Its shortcomings are: it is difficult to keep the billet supplied continuously, and it is impossible to achieve continuous and stable production of products; at the same time, the temperature of the molten billet decreases during the transfer process, and the pouring temperature cannot be guaranteed, and manual pouring is difficult to guarantee the pouring speed, which seriously affects the mechanical properties and surface quality of the product. Summary of the invention

[0003] The invention provides a continuous pouring system for continuous rheological extrusion of liquid metal, which is used to solve the deficiencies of the prior art.

[0004] The technical scheme of the present invention is as follows: a pouring system for continuous casting and extrusion of liquid nonferrous metals, comprising a melting furnace, a holding furnace, a runner device, a continuous rheological extruder, a cooling device, a guide frame and a storage device, wherein the melting furnace and the holding furnace are electromagnetic induction furnaces, which are composed of a crucible, an electromagnetic induction coil and a furnace cover, wherein the electromagnetic induction coil is arranged along the outer circumference of the crucible, the furnace cover is arranged on the top of the crucible, the crucible is placed on a base, the crucible and the base are made of high temperature resistant materials, the holding furnace is placed on a holding furnace platform, the holding furnace platform is supported on a ground foundation by a holding furnace bracket, the melting furnace is placed on the melting furnace platform, the melting furnace platform is supported on the holding furnace platform by a melting furnace bracket, the continuous rheological extruder is provided The cooling device, the guide frame and the storage device are arranged in sequence behind the continuous extruder and arranged in a straight line on the ground foundation, characterized in that: the pouring system for continuous rheological extrusion of liquid metal also includes a runner docking device, the runner docking device is a cylinder made of high temperature resistant material, the top surface of the cylinder is provided with a circular boss-type tenon along the circumference of the cylinder, the cylinder is provided with an inner hole, the inner hole is connected by a vertical hole and an inclined hole, the vertical hole is located at the center of the top surface of the cylinder, and extends vertically downward, the inclined hole is located in the middle and lower part of the side of the cylinder, extends obliquely upward, and is connected to the lower end of the vertical hole, and the angle between the inclined hole and the horizontal plane is α, 19°<α<20°;

[0005] The bottom center of the crucible of the melting furnace and the holding furnace is provided with a bottom channel, which is composed of two sections of holes. An arc hole is connected to the inner surface of the bottom of the crucible, and a round hole is connected to the outside of the bottom of the crucible. The lower port of the arc hole is connected to the upper port of the round hole. The bottom channel of the crucible is controlled to open and close by a plunger valve. The plunger valve includes a valve stem, a plunger valve plug and a plunger valve lifting device. The plunger valve plug is an inverted bullet-shaped cone made of high-temperature resistant material. The curvature of the arc surface of the bullet-shaped cone is the same as the curvature of the arc surface of the arc hole in the bottom channel of the crucible. A threaded hole is provided at the center of the top plane of the cone. The valve stem is a straight rod. The valve stem is composed of a metal rod coated with a high-temperature resistant material. The lower end of the metal rod is provided with a thread that matches the threaded hole at the center of the top plane of the plunger valve plug. The threaded hole is screwed onto the thread at the lower end of the metal rod, and a connection structure with a plunger valve lifting device is provided at the upper end of the metal rod; the plunger valve lifting device includes a speed reduction mechanism connected to a motor, and the plunger valve lifting device is installed on the furnace cover of the melting furnace and the insulation furnace; the outside of the bottom of the crucible of the melting furnace and the insulation furnace is provided with a groove that matches the circular annular boss-type tenon on the top surface of the flow channel docking device, and the circular annular boss-type tenon on the top surface of the flow channel docking device is placed in the groove outside the bottom of the crucible and connected to the crucible, and the axis of the vertical hole on the top surface of the flow channel docking device coincides with the axis of the circular hole at the bottom of the crucible; the bullet-shaped cone of the plunger valve plug is placed in the arc hole of the channel at the bottom of the crucible, the upper end of the valve stem extends out of the furnace cover, and the plunger valve lifting device connection structure at the upper end of the metal rod is connected to the speed reduction mechanism of the plunger valve lifting device;

[0006] The top surface of the base of the melting furnace and the holding furnace is provided with a groove matched with the flow channel docking device, the flow channel docking device is placed in the groove, and a flow channel placement hole is provided at a position corresponding to the inclined hole of the flow channel docking device on the base groove wall, and the flow channel placement hole extends outwardly to the outside of the base according to the inclination of the inclined hole of the flow channel docking device;

[0007] The holding furnace platform is located obliquely above the continuous rheological extruder, 100mm to 200mm higher than the continuous rheological extruder, and the melting furnace platform is located obliquely above the holding furnace, 100mm to 200mm higher than the holding furnace;

[0008] The flow channel device is composed of a flow channel, a flow channel insulation device and a flow channel gate. The flow channel is a tube made of high-temperature resistant material. The top of the tube made of high-temperature resistant material is provided with an opening along the axial direction of the tube. The opening is covered by an opening cover embedded with the tube. The central angle of the line connecting the two sides of the opening of the tube made of high-temperature resistant material and the center of the tube cross-section circle is β, 45°<β<80°; the flow channel insulation device includes a metal shell, an internal matrix and a resistance wire. The metal shell is a long strip box. The two end surfaces of the box are provided with holes matching the outer diameter of the flow channel. The box is divided into upper and lower halves with the center line of the length direction as the interface. The upper and lower halves of the box are at One side is connected by a hinge, and a long strip flow gate hole is opened on the upper rear end of the box body. The internal matrix is ​​a high-temperature resistant material filled in the metal shell. The high-temperature resistant material and the holes on the two end surfaces of the metal shell are provided with holes matching the outer diameter of the flow channel. The corresponding parts of the flow gate hole on the upper rear end of the matrix and the box body are provided with the same flow gate hole. The flow channel is placed in the hole of the high-temperature resistant material of the matrix, the front end of the flow channel extends out of the end face of the metal shell, the rear end of the flow channel extends out of the rear end face of the metal shell, the rear end of the flow channel and the corresponding parts of the flow gate hole on the rear end of the matrix are provided with the same flow gate hole, and the resistance wire is embedded in the high-temperature resistant material of the matrix. The flow channel gate is a square plate made of high temperature resistant material, with a lifting handle on the upper side of the square plate and a semicircular arc with the same radius as the outer circle of the flow channel on the lower side. A limiting hole is provided on one side of the square plate, and a limiting rod is placed in the limiting hole. The flow channel gate is inserted into the flow channel insulation device and the flow channel gate hole of the flow channel, and the semicircular arc below the flow channel gate falls into the flow channel to block the flow channel. When the flow channel gate is lifted and the limiting rod is inserted into the limiting hole, the part of the limiting rod outside the limiting hole is supported on the top surface of the flow channel insulation device box, the semicircular arc below the flow channel gate is located above the flow channel, and the flow channel is opened. The two sets of flow channel devices are respectively placed between the melting furnace and the holding furnace and between the holding furnace and the continuous rheological extruder. The flow channel device placed between the melting furnace and the holding furnace has a front end extending out of the flow channel at the front end of the flow channel holding device box and inserted into the flow channel placement hole of the melting furnace base, connected to the inclined hole on the side of the flow channel docking device of the melting furnace, and a rear end connected to the crucible of the holding furnace; the flow channel device placed between the holding furnace and the continuous rheological extruder has a front end extending out of the flow channel at the front end of the flow channel holding device box and inserted into the flow channel placement hole of the holding furnace base, connected to the inclined hole on the side of the flow channel docking device of the holding furnace, and a rear end connected to the wheel groove of the continuous rheological extruder.

[0009] The pouring system for continuous casting and extrusion of liquid nonferrous metals described in the present invention is characterized in that: when the continuous rheological extruder is a double-wheel groove continuous rheological extruder, the insulation furnace has two crucible bottom channels, two sets of plunger valves, two sets of flow channel docking devices, two flow channels are arranged in the flow channel insulation device, and a flow direction matching device is provided at the end of the flow channel device. The flow direction matching device is a block made of high-temperature resistant material, and two front and rear through holes are provided in the block. The front ports of the two holes correspond to the two flow channel ports of the flow channel device respectively, and the rear ports of the two holes correspond to the two wheel grooves of the continuous rheological extruder respectively.

[0010] The pouring system for continuous casting and extrusion of liquid nonferrous metals described in the present invention is characterized in that the runner device is composed of more than one section connected end to end, and the resistance wire in each section is independently connected to the power supply and control system.

[0011] The pouring system for continuous casting and extrusion of liquid nonferrous metals described in the present invention is characterized in that there are more than one melting furnace.

[0012] The pouring system for continuous casting and extrusion of liquid nonferrous metals described in the present invention is characterized in that the high-temperature resistant material used to make the flow channel, flow channel gate, flow channel docking device, flow direction matching device and plunger valve plug is graphite.

[0013] The method for using a pouring system for continuous casting and extrusion of liquid nonferrous metals described in the present invention includes smelting and extrusion, and is characterized in that: the smelting includes: loading the metal or alloy into a melting furnace for melting, and then flowing it into a holding furnace through a runner device; the extrusion includes: flowing the liquid metal in the holding furnace to a continuous rheological extruder through the runner device, during the flow process, the liquid metal gradually forms a semi-solid metal slurry, the semi-solid metal slurry is injected into the continuous rheological extruder for extrusion, the relative position of the plunger valve plug and the bottom channel of the crucible is controlled, the pouring speed is adjusted, the pouring speed is matched with the rotation speed of the continuous rheological extruder, the system is maintained in continuous production, and the prepared product is stored by the storage device after passing through the cooling device and the guide frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. One to three melting furnaces provide molten metal to the holding furnace. The metal smelting process and the extrusion deformation process are carried out continuously in stages, so that the molten metal billet can be continuously supplied and the production can be carried out continuously and stably.

[0016] 2. The plunger valve lifting device can adjust the gap between the plunger valve plug and the bottom channel of the crucible. The flow rate is controllable and the flow rate of the molten metal per unit time can be accurately controlled.

[0017] 3. The bottom channels of the holding furnace and the melting furnace are connected to the runners through the runner docking device. The runner docking device can be replaced according to the different molten metals. The inclination angle α of the runner docking device is adjusted to control the flow velocity in the runner to ensure the speed of the metal melt entering the continuous rheological extruder. The speed of the continuous rheological extruder is coordinated to control the production rhythm and ensure product performance.

[0018] 4. The insulation furnace and runner insulation device are set up to accurately control the temperature of the molten metal before it enters the continuous rheological extruder, meet the process requirements of different materials, and ensure product performance and surface quality.

[0019] 5. The plunger valve plug can be replaced to avoid the plunger valve plug being worn out due to long-term use and affecting the sealing effect of the plunger valve.

[0020] 6. The runner insulation device is a two-stage device that can be opened and closed, so that the internal graphite runner can be taken out and replaced in time. The runner device is composed of multiple sections and can be heated and controlled in sections; a runner gate is set at the end of the runner, which can be closed in an emergency to stop the melt from continuing to flow out.

[0021] 7. The embedded opening structure at the top of the runner can prevent the molten metal from entering the embedded gap of the runner cover. The runner cover can be opened to take out the residual solidified metal inside to ensure pure production.

[0022] 8. The flow channel has strong adaptability. The double-flow channel can be set for the continuous rheological extruder with double flow channels. It can be matched with the single-flow channel or double-flow channel continuous rheological extruder to meet the production needs of products of different shapes. For the continuous rheological extruder with double flow channels, the flow channel matching device set at the end of the flow channel ensures that the melt can accurately flow into the double wheel groove of the continuous rheological extruder.

[0023] 9. The production process is continuous, with less joint waste and high yield.

[0024] 10. Since continuous extrusion is carried out directly after the metal is melted, the casting process is avoided, thereby avoiding the pollution and oxidation of the metal during transportation and storage after casting, as well as the metal cleaning process before continuous extrusion, thereby improving production efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the pouring system structure used for continuous casting and extrusion of liquid non-ferrous metals.

[0026] Figure 2 This is a schematic diagram of the structure of the melting furnace and the holding furnace.

[0027] Figure 3 This is a cross-sectional diagram of the flow channel insulation device structure.

[0028] Figure 3-1 yes Figure 3Side view of

[0029] Figure 3-2 yes Figure 3-1 Diagram of the open state

[0030] Figure 3-3 yes Figure 3 Schematic diagram of top view

[0031] Figure 4 This is the main view of the flow gate

[0032] Figure 4-1 yes Figure 4 Side view of

[0033] Figure 4-2 This is a schematic diagram of the flow channel gate in the open state

[0034] Figure 4-3 This is a schematic diagram of the flow channel gate in the closed state

[0035] Figure 5 This is the main view of the flow channel

[0036] Figure 5-1 Schematic diagram of the top opening structure of the flow channel

[0037] Figure 6 This is the main view of the runner docking device

[0038] Figure 6-1 This is a side view of the flow channel docking device

[0039] Figure 6-2 This is a top view of the flow channel docking device

[0040] Figure 7 This is a schematic diagram of the connection between the melting furnace and the holding furnace.

[0041] Figure 8 Schematic diagram of the flow channel matching device

[0042] Fig. 9 This is a schematic diagram of the plunger valve structure.

[0043] Figure 9-1 Schematic diagram of the plunger valve stem structure

[0044] Figure 9-2 This is a schematic diagram of the plunger valve plug structure

[0045] In the figure: 1. plunger valve lifting device, 2. furnace cover, 3. melting furnace, 4. electromagnetic induction coil, 5. crucible, 6. plunger valve, 6-1, metal rod, 7. plunger valve plug, 8. flow channel docking device, 9. base, 10. flow channel, 11. flow channel insulation device, 12. flow channel gate, 13. melting furnace bracket, 14. insulation furnace bracket, 15. insulation furnace, 16. flow direction matching device, 17. continuous rheological extruder, 18. cooling device, 19. guide frame, 20. storage device. DETAILED DESCRIPTION

[0046] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0047] A pouring system for continuous casting and extrusion of liquid nonferrous metals, comprising a melting furnace 3, a holding furnace 15, a runner docking device 8, a runner device, a continuous rheological extruder 17, a cooling device 18, a guide frame 19 and a storage device 20, wherein the melting furnace 3 and the holding furnace 15 are electromagnetic induction furnaces, which are composed of a crucible 5, an electromagnetic induction coil 4 and a furnace cover 2, wherein the electromagnetic induction coil 4 is arranged along the outer circumference of the crucible 5, the furnace cover 2 is arranged on the top of the crucible 5, the crucible 5 is placed on a base 9, the crucible 5 and the base 9 are made of high temperature resistant materials, the holding furnace 15 is placed on a holding furnace platform, the holding furnace platform is supported on the ground foundation by a holding furnace bracket 14, the melting furnace 3 is placed on the melting furnace platform, and the melting furnace platform is supported by a melting furnace bracket 14. The furnace support 13 is supported on the insulation furnace platform, the continuous rheological extruder 17 is arranged on the ground foundation, the cooling device 18, the guide frame 19 and the storage device 20 are arranged in sequence behind the continuous extruder, and are arranged in a straight line; the flow channel docking device 8 is a cylinder made of high temperature resistant material, and the top surface of the cylinder is provided with a circular annular boss-type tenon along the circumference of the cylinder, and the cylinder is provided with an inner hole, which is composed of a vertical hole and an inclined hole connected, the vertical hole is located at the center of the top surface of the cylinder, and extends vertically downward, the inclined hole is located in the middle and lower part of the side of the cylinder, extends obliquely upward, and is connected to the lower end of the vertical hole, and the angle between the inclined hole and the horizontal plane is α, 19°<α<20°;

[0048] A bottom channel is provided at the center of the bottom of the crucible 5 of the melting furnace 3 and the holding furnace 15. The bottom channel is composed of two sections of holes. An arc hole is connected to the inner surface of the bottom of the crucible 5, and a round hole is connected to the outside of the bottom of the crucible 5. The lower port of the arc hole is connected to the upper port of the round hole. The bottom channel of the crucible is controlled to open and close by a plunger valve 6. The plunger valve 6 includes a valve stem, a plunger valve plug 7 and a plunger valve lifting device 1. The plunger valve plug 7 is an inverted bullet-shaped cone made of high-temperature resistant material. The curvature of the arc surface of the bullet-shaped cone is the same as the curvature of the arc surface of the arc hole in the bottom channel of the crucible 5. A threaded hole is provided at the center of the top plane of the cone. The valve stem is a straight rod. The valve stem is composed of a metal rod 6-1 coated with a high-temperature resistant material. The lower end of the metal rod 6-1 is provided with a thread matching the threaded hole at the center of the top plane of the plunger valve plug 7. The threaded hole of the plunger valve plug 7 is screwed on On the thread at the lower end of the metal rod 6-1, the upper end of the metal rod 6-1 is provided with a connection structure with the plunger valve lifting device 1; the plunger valve lifting device 1 includes a speed reduction mechanism connected to the motor, and the plunger valve lifting device 1 is installed on the furnace cover 2 of the melting furnace 3 and the insulation furnace 15; the outside of the bottom of the crucible 5 of the melting furnace 3 and the insulation furnace 15 is provided with a groove that matches the circular boss-type tenon on the top surface of the flow channel docking device 8, and the circular boss-type tenon on the top surface of the flow channel docking device 8 is placed in the groove outside the bottom of the crucible 5 and connected to the crucible 5, and the axis of the vertical hole on the top surface of the flow channel docking device 8 coincides with the axis of the circular hole at the bottom of the crucible 5; the bullet-shaped cone of the plunger valve plug 7 is placed in the arc hole of the channel at the bottom of the crucible 5, the upper end of the valve stem extends out of the furnace cover 2, and the connection structure with the plunger valve lifting device at the upper end of the metal rod 6-1 is connected to the speed reduction mechanism of the plunger valve lifting device 1;

[0049] The top surface of the base 9 of the melting furnace 3 and the holding furnace 15 is provided with a groove matched with the flow channel docking device 8, the flow channel docking device 8 is placed in the groove, and the groove wall of the base is provided with a flow channel placement hole at a position corresponding to the inclined hole of the flow channel docking device 8, and the flow channel placement hole extends outwardly to the outside of the base according to the inclination of the inclined hole of the flow channel docking device 8;

[0050] The holding furnace platform is located obliquely above the continuous rheological extruder 17, and is 100 mm to 200 mm higher than the continuous rheological extruder 17. The melting furnace platform is located obliquely above the holding furnace 15, and is 100 mm to 200 mm higher than the holding furnace 15.

[0051] The flow channel device is composed of a flow channel 10, a flow channel insulation device 11 and a flow channel gate 12. The flow channel 10 is a tube made of high-temperature resistant material. An opening is provided at the top of the tube made of high-temperature resistant material along the axial direction of the tube. The opening is covered by an opening cover that is embedded in the tube as a whole. The central angle of the line connecting the two sides of the opening of the tube made of high-temperature resistant material and the center of the tube cross-section circle is β, 45°<β<80°; the flow channel insulation device 11 includes a metal shell, an internal matrix and a resistance wire. The metal shell is a long strip box. The two end surfaces of the box are provided with holes that match the outer diameter of the flow channel 10. The box is divided into upper and lower halves with the center line in the longitudinal direction as the interface. The upper and lower halves of the box are connected by a hinge on one side, and a long strip flow channel gate hole is opened on the upper side of the rear end of the box; the internal matrix is ​​a high-temperature resistant material filled in the metal shell, and the high-temperature resistant material is provided with a hole that matches the outer diameter of the flow channel 10 at the corresponding position of the hole on the two end surfaces of the metal shell. The matrix and the flow on the rear end of the box The corresponding part of the gate hole is provided with the same flow channel gate hole, the flow channel 10 is placed in the hole of the high temperature resistant material of the substrate, the front end of the flow channel 10 extends out of the end face of the metal shell, the rear end of the flow channel 10 extends out of the rear end face of the metal shell, the rear end of the flow channel 10 and the corresponding part of the flow channel gate hole at the rear end of the substrate are provided with the same flow channel gate hole, the resistance wire is embedded in the high temperature resistant material of the substrate, and the two ends of the resistance wire are led out by wires and connected to the power supply and control system; the flow channel gate 12 is a square plate made of high temperature resistant material, a lifting handle is provided on the square plate, and a semicircular arc with the same radius as the outer circle of the flow channel is provided on the bottom, and the square plate A limiting hole is provided on one side of the flow channel, and the limiting rod is placed in the limiting hole. The flow channel gate 12 is inserted into the flow channel gate holes of the flow channel insulation device 11 and the flow channel 10. The semicircular arc below the flow channel gate 12 falls into the flow channel to block the flow channel. When the flow channel gate is lifted, the limiting rod is inserted into the limiting hole. When the part of the limiting rod outside the limiting hole is supported on the top surface of the flow channel insulation device box, the semicircular arc below the flow channel gate 12 is located above the flow channel, and the flow channel is opened; the two sets of the flow channel devices are respectively placed between the melting furnace 3 and the insulation furnace 15 and between the insulation furnace 15 and the continuous rheological extruder 17, and are placed in the melting furnace 3 and the insulation furnace 15. The flow channel device between the melting furnace 3 and the insulation furnace 15 has a flow channel 10 extending from the front end of the flow channel insulation device 11 box body and inserted into the flow channel placement hole of the melting furnace base 9, connected to the inclined hole on the side of the melting furnace flow channel docking device 8, and its rear end is connected to the crucible of the insulation furnace 15; the flow channel device placed between the insulation furnace 15 and the continuous rheological extruder 17 has a flow channel 10 extending from the front end of the flow channel insulation device 11 box body and inserted into the flow channel placement hole of the insulation furnace base 9, connected to the inclined hole on the side of the insulation furnace flow channel docking device 8, and its rear end is connected to the wheel groove of the continuous rheological extruder 17. The flow channel device is composed of one or more sections connected end to end, and the resistance wire in each section is independently connected to the power supply and control system. There are more than one melting furnace 3, which are connected to the insulation furnace 15 respectively, and the high temperature resistant material used to make the above-mentioned flow channel 10, flow channel gate 12, flow channel docking device 8, flow direction matching device 16 and plunger valve plug 7 is graphite.

[0052] When the continuous rheological extruder 17 is a double-wheel groove continuous rheological extruder, the holding furnace 15 has two crucible bottom channels, two sets of plunger valves 6, two sets of flow channel docking devices 8, two flow channels 10 arranged in the flow channel insulation device 11, and a flow direction matching device 16 is provided at the end of the flow channel device. The flow direction matching device 16 is a block made of high-temperature resistant material, and two front and rear through holes are provided in the block. The front ports of the two holes correspond to the two flow channel ports of the flow channel device respectively, and the rear ports of the two holes correspond to the two wheel grooves of the continuous rheological extruder 17 respectively.

[0053] The method for using a pouring system for continuous casting and extrusion of liquid nonferrous metals includes smelting and extrusion. The smelting includes: loading the metal or alloy into a melting furnace 3 for melting, and then flowing it into a holding furnace 15 through a flow channel device; the extrusion includes: flowing the liquid metal in the holding furnace 15 to a continuous rheological extruder 17 through a flow channel device. During the flow process, the liquid metal gradually forms a semi-solid metal slurry, and the semi-solid metal slurry is injected into the continuous rheological extruder 17 for extrusion. The relative position of the plunger valve plug 7 and the bottom channel of the crucible is controlled, and the pouring speed is adjusted to match the pouring speed with the rotation speed of the continuous rheological extruder 17 to maintain continuous production of the system. The prepared product is stored by a storage device 20 after passing through a cooling device 18 and a guide frame 19.

[0054] Example Take 6061 alloy as raw material to prepare aluminum alloy wire with a diameter of 9.5mm. The mass percentage of the main chemical components of 6061 alloy is: Si 0.560%, Mg 0.866%, Fe 0.463%, the total impurities ≤ 0.1%, Al balance;

[0055] 1. Preheat the two melting furnaces 3 to 720°C to 750°C, and add a total of 20kg of 6061 alloy aluminum ingots into the two melting furnaces;

[0056] 2. When the refined melt reaches 700°C to 750°C, a plunger valve lifting device of a melting furnace is used to adjust the position of the plunger valve plug in the bottom channel of the melting furnace crucible, so that the melt is introduced into the insulation furnace 15 through the flow channel with the insulation device at a suitable flow rate for insulation. Both the melting furnace 3 and the insulation furnace 15 have single plunger valves;

[0057] 3. When the melt in the holding furnace is at 720°C, the position of the plunger valve plug 7 in the bottom channel of the holding furnace crucible is adjusted by the holding furnace plunger valve lifting device, so that the melt is introduced into the wheel groove of the continuous rheological extruder through the flow channel with the holding device at a flow rate matching the speed of the continuous rheological extruder. The speed of the extrusion roller of the continuous rheological extruder is 4.71m / min, and an aluminum alloy wire with a diameter of 9.5mm is prepared;

[0058] 4. After the melt in the first melting furnace has run out, the plunger valve lifting device of the second melting furnace is used to adjust the position of the plunger valve plug in the bottom channel of the crucible of the melting furnace, so that the melt is introduced into the insulation furnace through the flow channel with the insulation device at a suitable flow rate for insulation, so that the melt in the insulation furnace 15 is kept uninterrupted, so that the wire extruded by the continuous rheological extruder is continuous;

[0059] 5. The wire extruded by the continuous rheological extruder is stored by the storage device 20 through the guide frame 19, and the storage device 20 is a wire collection and arrangement machine;

[0060] 6. After production is completed, turn off all equipment. If there is residual molten metal in the runner, close the gate at the end of the runner. After the melt is completely cooled and solidified, open the runner insulation device, open the runner opening cover, take out the residual solidified metal in the runner, and prepare for a pure production.

Claims

1. A pouring system for continuous casting and extrusion of liquid nonferrous metals, comprising a melting furnace (3), a holding furnace (15), a flow channel device, a continuous rheological extruder (17), a cooling device (18), a guide frame (19) and a storage device (20), wherein the melting furnace (3) and the holding furnace (15) are electromagnetic induction furnaces, which are composed of a crucible (5), an electromagnetic induction coil (4) and a furnace cover (2), wherein the electromagnetic induction coil (4) is arranged along the outer circumference of the crucible (5), the furnace cover (2) is arranged on the top of the crucible (5), and the crucible (5) is placed on a base. (9), the crucible (5) and the base (9) are made of high temperature resistant materials, the insulation furnace (15) is placed on the insulation furnace platform, the insulation furnace platform is supported on the ground foundation by the insulation furnace bracket (14), the melting furnace (3) is placed on the melting furnace platform, the melting furnace platform is supported on the insulation furnace platform by the melting furnace bracket (13), the continuous rheological extruder (17) is arranged on the ground foundation, the cooling device (18), the guide frame (19) and the storage device (20) are arranged in sequence behind the continuous extruder, and are arranged in a straight line, characterized in that: The pouring system for continuous rheological extrusion of liquid metal also includes a runner docking device (8), which is a cylinder made of high-temperature resistant material, and the top surface of the cylinder is provided with a circular boss-type tenon along the circumference of the cylinder, and the cylinder is provided with an inner hole, which is composed of a vertical hole and an inclined hole connected, the vertical hole is located at the center of the top surface of the cylinder and extends vertically downward, the inclined hole is located in the middle and lower part of the side of the cylinder, extends obliquely upward, and is connected to the lower end of the vertical hole, and the angle between the inclined hole and the horizontal plane is α, 19°<α<20°; A bottom channel is provided at the center of the bottom of the crucible (5) of the melting furnace (3) and the holding furnace (15). The bottom channel is composed of two holes. An arc hole is connected to the inner surface of the bottom of the crucible (5), and a round hole is connected to the outer surface of the bottom of the crucible (5). The lower end of the arc hole is connected to the upper end of the round hole. The bottom channel of the crucible is controlled to open and close by a plunger valve (6). The plunger valve (6) includes a valve stem, a plunger valve plug (7) and a plunger valve lifting device (1). The plunger valve plug (7) is An inverted bullet-shaped cone is made of high-temperature resistant material, the curvature of the arc surface of the bullet-shaped cone is the same as the curvature of the arc surface of the arc hole of the bottom channel of the crucible (5), a threaded hole is arranged at the center of the top plane of the cone, the valve stem is a straight rod, the valve stem is formed by coating a metal rod (6-1) with high-temperature resistant material, the lower end of the metal rod (6-1) is provided with a thread matching the threaded hole at the center of the top plane of the plunger valve plug (7), the threaded hole of the plunger valve plug (7) is screwed on the metal rod (6-1), and the threaded hole of the plunger valve plug (7) is screwed on the metal rod (6-1). 1), the upper end of the metal rod (6-1) is provided with a connection structure with a plunger valve lifting device (1); the plunger valve lifting device (1) includes a speed reduction mechanism connected to a motor, and the plunger valve lifting device (1) is installed on the furnace cover (2) of the melting furnace (3) and the insulation furnace (15); the bottom of the crucible (5) of the melting furnace (3) and the insulation furnace (15) is provided with a groove matching with the circular boss-type tenon on the top surface of the flow channel docking device (8), and the flow channel docking device The annular boss-type tenon on the top surface of the device (8) is placed in a groove outside the bottom of the crucible (5) and connected to the crucible (5), and the axis of the vertical hole on the top surface of the flow channel docking device (8) coincides with the axis of the circular hole at the bottom of the crucible (5); the bullet-shaped cone of the plunger valve plug (7) is placed in the arc hole of the bottom channel of the crucible (5), the upper end of the valve stem extends out of the furnace cover (2), and the plunger valve lifting device connection structure at the upper end of the metal rod (6-1) is connected to the speed reduction mechanism of the plunger valve lifting device (1); The top surface of the base (9) of the melting furnace (3) and the holding furnace (15) is provided with a groove matched with the flow channel docking device (8), the flow channel docking device (8) is placed in the groove, and a flow channel placement hole is provided at a position corresponding to the inclined hole of the flow channel docking device (8) on the wall of the base groove, and the flow channel placement hole extends outwardly to the outside of the base according to the inclination of the inclined hole of the flow channel docking device (8); The holding furnace platform is located obliquely above the continuous rheological extruder (17), 100 mm to 200 mm higher than the continuous rheological extruder (17); the melting furnace platform is located obliquely above the holding furnace (15), 100 mm to 200 mm higher than the holding furnace (15); The flow channel device is composed of a flow channel (10), a flow channel heat preservation device (11) and a flow channel gate (12). The flow channel (10) is a tube made of high temperature resistant material. The top of the tube made of high temperature resistant material is provided with an opening along the axial direction of the tube. The opening is covered by an opening cover which is embedded in the tube as a whole. The central angle of the line connecting the two sides of the opening of the tube made of high temperature resistant material and the center of the tube cross section circle is β. 45°<β<80°; the flow channel heat preservation device (11) comprises a metal shell, an internal matrix and a resistance wire, the metal shell is a long strip box, and holes matching the outer diameter of the flow channel (10) are provided on both end surfaces of the box, the box is divided into upper and lower halves with the center line in the longitudinal direction as the interface, the upper and lower halves of the box are connected by a hinge on one side, and a long strip flow channel gate hole is opened on the upper surface of the rear end of the box, the internal matrix is ​​a high temperature resistant material filled in the metal shell, and the high temperature resistant material is provided with holes matching the outer diameter of the flow channel (10) at the positions corresponding to the holes on the two end surfaces of the metal shell, and the matrix is ​​aligned with the flow channel gate hole on the upper surface of the rear end of the box. The corresponding part is provided with the same flow channel gate hole, the flow channel (10) is placed in the hole of the high temperature resistant material of the substrate, the front end of the flow channel (10) extends out of the end face of the metal shell, the rear end of the flow channel (10) extends out of the rear end face of the metal shell, and the rear end of the flow channel (10) is provided with the same flow channel gate hole at the corresponding position of the flow channel gate hole at the rear end of the substrate, the resistance wire is embedded in the high temperature resistant material of the substrate, and the two ends of the resistance wire are led out by wires and connected to the power supply and control system; the flow channel gate (12) is a square plate made of high temperature resistant material, the upper side of the square plate is provided with a lifting handle, the lower side is a semicircular arc with the same radius as the outer circle of the flow channel, and one side of the square plate is provided with a limit The flow channel gate (12) is inserted into the flow channel gate holes of the flow channel insulation device (11) and the flow channel (10), and the semicircular arc below the flow channel gate (12) falls into the flow channel to block the flow channel. When the flow channel gate is lifted, the limit rod is inserted into the limit hole, and the part of the limit rod outside the limit hole is supported on the top surface of the flow channel insulation device box, the semicircular arc below the flow channel gate (12) is located above the flow channel, and the flow channel is opened; the two sets of the flow channel devices are respectively placed between the melting furnace (3) and the insulation furnace (15) and between the insulation furnace (15) and the continuous rheological extruder (17), and are placed between the melting furnace (3) and the insulation furnace The runner device is placed between the insulation furnace (15) and the continuous rheological extruder (17), wherein the front end of the runner (10) extends out of the front end of the runner insulation device (11) box and is inserted into the runner placement hole of the melting furnace base (9), connected to the inclined hole on the side of the melting furnace runner docking device (8), and the rear end is connected to the crucible of the insulation furnace (15); the runner device is placed between the insulation furnace (15) and the continuous rheological extruder (17), wherein the front end of the runner (10) extends out of the front end of the runner insulation device (11) box and is inserted into the runner placement hole of the insulation furnace base (9), connected to the inclined hole on the side of the insulation furnace runner docking device (8), and the rear end is connected to the wheel groove of the continuous rheological extruder (17).

2. A pouring system for continuous casting and extrusion of liquid nonferrous metals according to claim 1, characterized in that; When the continuous rheological extruder (17) is a double-wheel groove continuous rheological extruder, the holding furnace (15) has two crucible bottom channels, two sets of plunger valves (6), two sets of flow channel docking devices (8), two flow channels (10) arranged in the flow channel insulation device (11), and a flow direction matching device (16) is provided at the end of the flow channel device. The flow direction matching device (16) is a block made of high-temperature resistant material, and two holes are provided in the block that pass through the block. The front ports of the two holes correspond to the two flow channel ports of the flow channel device, and the rear ports of the two holes correspond to the two wheel grooves of the continuous rheological extruder (17).

3. A pouring system for continuous casting and extrusion of liquid nonferrous metals according to claim 1, characterized in that; The flow channel device is composed of more than one section connected end to end, and the resistance wire in each section is independently connected to the power supply and control system.

4. A pouring system for continuous casting and extrusion of liquid nonferrous metals according to claim 1, characterized in that; There are more than one melting furnace.

5. A pouring system for continuous casting and extrusion of liquid nonferrous metals according to claim 1, characterized in that; The high temperature resistant material used to make the flow channel (10), the flow channel gate (12), the flow channel docking device (8), the flow direction matching device (16) and the plunger valve plug (7) is graphite.

6. A method for using a pouring system for continuous casting and extrusion of liquid nonferrous metals as claimed in claim 1, comprising smelting and extrusion, characterized in that: The smelting comprises: loading the metal or alloy into a melting furnace (3) for melting, and then flowing the metal or alloy into a holding furnace (15) through a flow channel device; the extrusion comprises: flowing the liquid metal in the holding furnace (15) to a continuous rheological extruder (17) through the flow channel device, during which the liquid metal gradually forms a semi-solid metal slurry, the semi-solid metal slurry is injected into the continuous rheological extruder (17) for extrusion, the relative position of the plunger valve plug (7) and the bottom channel of the crucible is controlled, the pouring speed is adjusted so that the pouring speed matches the rotation speed of the continuous rheological extruder (17), and the system is kept in continuous production, and the prepared product is stored by a storage device (20) after passing through a cooling device (18) and a guide frame (19).

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