Oxygen-insulation and heat-preservation quasi-slag-crust-free intelligent zinc ingot quantitative casting system and device

Abstract

The invention provides an oxygen insulation and heat preservation quasi-slag-crust-free intelligent zinc ingot quantitative casting system and device. The device comprises a smelting furnace and a nitrogen making machine. A liquid lifting well, a zinc liquid lifting device, a chute communicated with the liquid lifting well and a chute cover plate are arranged on the smelting furnace; the chute is communicated with a casting groove; a casting groove cover is arranged at an inlet of the casting groove, a conveying belt is arranged at a casting opening of the casting groove, and a zinc ingot mold is arranged on the conveying belt; a casting driving device for driving the casting groove to incline and a following driving device for driving the casting groove to move are arranged at the casting groove; a nitrogen protection cover is arranged on the conveying belt; and an outlet of a nitrogen making machine is connected into the chute, the casting groove and the nitrogen protection cover through pipelines. According to the oxygen insulation and heat preservation quasi-slag-skin-free intelligent zinc ingot quantitative casting system and device, the technical problem that in the prior art, a large number of zinc skins are likely to be generated in the casting process of zinc liquid is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of zinc smelting, in particular to an oxygen-isolated and heat-preserved quasi-skin-free intelligent zinc ingot quantitative casting system and device. BACKGROUND

[0002] In the zinc smelting industry, the relatively primitive zinc ingot casting method usually involves pouring molten zinc into a mold, and after it cools and solidifies, a zinc ingot is formed. Zinc is a relatively active metal that can react with oxygen to produce zinc oxide at room temperature, and the reaction is intense when the temperature reaches 225 degrees Celsius. The casting temperature of zinc liquid is usually between 450 degrees Celsius and 500 degrees Celsius, and zinc liquid can quickly produce a large amount of zinc oxide skin as soon as it comes into contact with air.

[0003] The traditional continuous casting process: uses a zinc ingot continuous casting forming device, which includes a robot scoop or a swing arm scoop, a casting mold, a conveyor belt, etc. The zinc liquid is scooped by a robot hand or a swing shaft, and then introduced into the mold. The conveyor belt moves at a constant speed, and the robot scoop or swing arm scoop automatically scoops the zinc according to the rhythm. The whole process does not require manual intervention, but during the scooping and pouring process, the zinc liquid is always exposed to the air, causing a large amount of zinc oxide skin on the surface of the cast zinc ingot to be treated.

[0004] The current production process uses a more advanced pump-following continuous casting, which cannot avoid the oxidation of zinc liquid in the casting process to produce zinc oxide skin. The zinc oxide skin on the surface of the zinc ingot needs to be cleaned manually, which not only consumes manpower and affects the appearance quality of the zinc ingot, but also requires a large amount of energy to reduce the zinc oxide skin back to zinc through a reduction reaction, resulting in huge economic costs. SUMMARY

[0005] To solve the technical problem of the existing technology that zinc liquid is prone to produce a large amount of zinc oxide skin during the casting process, the present application provides an oxygen-isolated and heat-preserved quasi-skin-free intelligent zinc ingot quantitative casting system and device.

[0006] An oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device comprises a smelting furnace and a nitrogen generator; a liquid lifting well and a zinc liquid lifting device are provided in the smelting furnace, the top of the liquid lifting well extends out of the smelting furnace and is connected to a chute; a chute cover is provided on the top of the chute, and the chute is connected to a casting trough at one end away from the liquid lifting well; a casting trough cover is provided on the top of the casting trough entrance, a conveyor belt is provided at the casting mouth of the casting trough, and a zinc ingot mold is provided on the conveyor belt; a casting drive device for driving the casting trough to tilt and a follow-up drive device for driving the casting trough to move along the length direction of the conveyor belt are provided at the casting trough; a nitrogen protective cover is provided on the conveyor belt at the casting mouth of the casting trough; the outlet of the nitrogen generator is connected to the chute, the casting trough and the nitrogen protective cover through a pipeline.

[0007] In a preferred embodiment of an oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device provided by the present invention, the follow-up drive device includes a frame, a guide rail, a mounting seat and a follow-up drive cylinder; the guide rail is arranged on the top of the frame and is arranged along the length direction of the conveyor belt, and the mounting seat is slidingly connected to the guide rail; the casting trough is hinged to the mounting seat; one end of the follow-up drive cylinder is hinged to the mounting seat, and the other end is hinged to the frame.

[0008] In a preferred embodiment of an oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device provided by the present invention, the casting drive device includes a casting drive electric cylinder, one end of the casting drive electric cylinder is hinged to the mounting seat, and the other end is hinged to the casting trough.

[0009] In a preferred embodiment of the oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device provided by the present invention, a nitrogen heating furnace is further provided on the pipeline between the nitrogen generator and the chute, the casting trough and the nitrogen protective cover.

[0010] In a preferred embodiment of the oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device provided by the present invention, the casting trough cover is provided with a through hole; and laser liquid level meters are provided above the liquid lifting well and above the through hole of the casting trough cover.

[0011] In a preferred embodiment of the oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device provided by the present invention, the side of the nitrogen protective cover close to the casting trough is a double-layer soft curtain, and the side and top surface away from the casting trough are high-temperature resistant glass.

[0012] In a preferred embodiment of the oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device provided by the present invention, the chute is arranged at an angle, and its height near one end of the casting trough is lower than its height near one end of the lifting well.

[0013] In a preferred embodiment of the oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device provided by the application, the casting groove cover is a telescopic cover plate.

[0014] In a preferred embodiment of the oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device provided by the application, the zinc liquid lifting device comprises a centrifugal pump and a zinc pump motor for driving the centrifugal pump to rotate, the outlet of the centrifugal pump is communicated with the inlet at the bottom of the liquid lifting well, and the zinc pump motor is arranged at the top of the smelting furnace.

[0015] The application further provides a process system comprising the oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device.

[0016] Compared with the prior art, in the zinc liquid conveying and casting process of the oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device provided by the application, the zinc liquid is in a high-temperature nitrogen environment, oxygen is isolated, zinc oxide skin is avoided, the high-temperature nitrogen can continuously keep warm, and the cooling speed of the zinc liquid is reduced; the zinc liquid outflow amount of each casting can be accurately controlled through the cooperation of the zinc pump motor, the laser liquid level instrument, the following driving device and the casting driving device, and quantitative casting is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of an oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device provided by the application; Figure 2 is a structural schematic view of an oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device provided by the application from another perspective; Figure 3 is Figure 2 is an enlarged view of A in DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application.

[0019] Please refer to Figures 1 to 3 , which are a structural schematic view of an oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device provided by the application from different perspectives and an enlarged view of A therein.

[0020] The oxygen-barrier and heat-preservation quasi- slag-skin-free intelligent zinc ingot quantitative casting device comprises a smelting furnace 1 and a nitrogen generator 4.

[0021] The smelting furnace 1 is provided with a riser 11 and a centrifugal pump 12, the outlet of the centrifugal pump 12 is communicated with the inlet of the bottom of the riser 11. The top of the smelting furnace 1 is provided with a zinc pump motor 3. The zinc pump motor 3 is connected with the shaft of the centrifugal pump 12, and drives the centrifugal pump 12 to rotate.

[0022] The top of the riser 11 extends out of the smelting furnace 1 and is communicated with a chute 6. The chute 6 is arranged obliquely, and the height of the end close to the riser 11 is higher than the height of the end far from the riser 11, and the slope of the chute 6 is 3%. The top of the chute 6 is covered with a chute cover plate (not shown in the figure).

[0023] The end far from the riser 11 of the chute 6 is provided with a casting tank 5. The top of the inlet of the casting tank 5 is provided with a casting tank cover (not shown in the figure). The casting tank cover is provided with a through hole.

[0024] The outlet of the chute 6 is communicated to the inside of the casting tank 5 through the through hole. The top of the through hole is provided with a laser liquid level instrument 2, and the light of the laser liquid level instrument 2 is vertically irradiated on the liquid surface in the casting tank 5.

[0025] The top of the riser 11 is provided with another laser liquid level instrument 2, and the light of the laser liquid level instrument 2 is vertically irradiated on the center position of the liquid surface of the riser 11.

[0026] The casting port of the casting tank 5 is provided with a conveying belt 17, and the conveying belt 17 is provided with a zinc ingot mold 10.

[0027] The bottom of the casting tank 5 is provided with a casting driving device 13 for driving the inclination of the casting tank 5, and a following driving device 14 for driving the movement of the casting tank 5 along the length direction of the conveying belt 17.

[0028] The following driving device 14 comprises a rack 16, a guide rail (not marked in the figure), a mounting seat 15 and a following driving oil cylinder (not marked in the figure). The bottom of the casting tank 5 is hinged with the top of the mounting seat 15, the bottom of the mounting seat 15 is slidingly connected with the top of the rack 16 through the guide rail, and the guide rail is arranged along the length direction of the conveying belt 17. One end of the following driving oil cylinder is hinged with the rack 16, and the other end is hinged with the mounting seat 15.

[0029] The casting slot cover is a telescopic cover plate, which comprises a fixed cover and a telescopic cover, and the fixed cover is provided with a through hole at the center position; when the telescopic cover plate is in a contracted state, the telescopic cover is received between the through hole of the fixed cover and the side edge of the fixed cover, and when the telescopic cover plate is in an elongated state, the telescopic cover is extended from the side edge of the fixed cover. During the movement of the casting slot 5, the telescopic cover is extended from or received in the fixed cover, and the casting slot cover always covers the top of the inlet of the casting slot 5; the outlet of the chute 6 always passes through the through hole of the casting slot cover and is located in the casting slot 5; the light of the laser liquid level instrument 2 at the casting slot 5 always passes through the through hole and irradiates on the liquid surface in the casting slot 5.

[0030] The casting driving device 13 comprises a casting driving electric cylinder, one end of which is hinged to the mounting seat 15, and the other end is hinged to the side of the casting slot 5 away from the casting port.

[0031] The nitrogen protection cover 8 is arranged on the conveying belt 17, and the casting port of the casting slot 5 and the zinc ingot mold 10 within the movement distance of the casting slot 5 are covered in the nitrogen protection cover 8. The side surface close to the casting slot 5 of the nitrogen protection cover 8 is a double-layer soft curtain, and the material of the soft curtain is high-temperature-resistant carbon fiber cloth, which is convenient for the movement of the casting slot 5. The side surface and the top surface away from the casting slot 5 of the nitrogen protection cover 8 are high-temperature-resistant glass, which is convenient for observing the casting condition.

[0032] The nitrogen making machine 4 is connected with a nitrogen heating furnace 7 through a pipeline 9, and the outlet of the nitrogen heating furnace 7 is communicated to the chute 6, the casting slot 5 and the nitrogen protection cover 8 through the pipeline 9. The pipeline 9 connected with the chute 6 forms a plurality of gas outlets between the liquid surface in the chute 6 and the chute cover plate. The pipeline 9 connected with the casting slot 5 enters the casting slot 5 through the through hole of the casting slot cover, and forms a plurality of gas outlets between the liquid surface in the casting slot 5 and the casting slot cover.

[0033] In specific implementation, the zinc pump motor 3 drives the impeller of the centrifugal pump 12 to rotate, and the zinc liquid enters the riser 11 under the action of centrifugal force and slowly rises from the bottom. The laser liquid level instrument 2 above the riser 11 detects the liquid level height in the riser 11, adjusts the rotating speed of the zinc pump motor 3, so as to control the liquid level height in the riser 11 to be stable at a preset value.

[0034] The zinc liquid in the riser well 11 flows to the casting trough 5 through the chute 6. The laser liquid level meter 2 above the casting trough 5 detects the height of the zinc liquid in the casting trough 5. When the liquid level in the casting trough 5 reaches the preset height, the casting driving device 13 pushes the casting trough 5 to tilt at a certain angle, and the zinc liquid flows from the casting port of the casting trough 5 into the zinc ingot mold 10 below.

[0035] The zinc ingot mold 10 moves forward on the conveying belt 17, and the casting trough 5 is driven by the following driving device 14 to move at the same speed as the moving speed of the zinc ingot mold 10. When the casting trough 5 is tilted for casting, the casting port of the casting trough 5 is always at the center of the zinc ingot mold 10. During the movement of the casting trough 5, the laser liquid level meter 2 above the casting trough 5 always detects the height of the zinc liquid in the casting trough 5, and the casting is completed when the height of the zinc liquid decreases to the preset value. After the casting is completed, the casting trough 5 is driven by the casting driving device 13 to return to the starting position, and the following driving device 14 drives the casting trough 5 to return to the starting position, waiting for the next casting.

[0036] During the whole process, the nitrogen gas generated by the nitrogen generator 4 is heated to above 450 degrees Celsius by the nitrogen gas heating furnace 7, and is continuously delivered to the chute 6, the casting trough 5 and the nitrogen gas protection cover 8 through the pipeline 9, so that the air in the chute 6, the casting trough 5 and the nitrogen gas protection cover 8 is discharged and prevented from entering, avoiding the oxidation of the zinc liquid.

[0037] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields based on the content of the present application, is also included in the patent protection scope of the present application.

Claims

1. An oxygen-insulating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device, characterized by: It comprises a smelting furnace and a nitrogen generator; the smelting furnace is provided with a liquid lifting well and a zinc liquid lifting device, the top of the liquid lifting well extends out of the smelting furnace and is connected to a chute; the top of the chute is provided with a chute cover, and the chute is connected to a casting trough at one end away from the liquid lifting well; the top of the casting trough entrance is provided with a casting trough cover, the casting mouth of the casting trough is provided with a conveyor belt, and a zinc ingot mold is provided on the conveyor belt; the casting trough is provided with a casting drive device for driving the casting trough to tilt and a follow-up drive device for driving the casting trough to move along the length direction of the conveyor belt; a nitrogen protective cover is provided on the conveyor belt at the casting mouth of the casting trough; the outlet of the nitrogen generator is connected to the chute, the casting trough and the nitrogen protective cover through a pipeline.

2. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1 is characterized in that: The following drive device includes a frame, a guide rail, a mounting seat and a following drive cylinder; the guide rail is arranged on the top of the frame and is arranged along the length direction of the conveyor belt, and the mounting seat is slidably connected to the guide rail; the casting trough is hinged to the mounting seat; one end of the following drive cylinder is hinged to the mounting seat, and the other end is hinged to the frame.

3. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 2, characterized in that: The casting drive device comprises a casting drive electric cylinder, one end of the casting drive electric cylinder is hinged to the mounting seat, and the other end is hinged to the casting trough.

4. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1 is characterized in that: A nitrogen heating furnace is also provided on the pipeline connecting the nitrogen generator to the chute, the casting trough and the nitrogen protective cover.

5. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1 is characterized in that: The casting trough cover is provided with a through hole; a laser liquid level meter is provided above the liquid lifting well and above the through hole of the casting trough cover.

6. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1 is characterized in that: The side surface of the nitrogen protective cover close to the casting trough is a double-layer soft curtain, and the side surface and top surface away from the casting trough are high-temperature resistant glass.

7. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1 is characterized in that: The chute is arranged obliquely, and its height close to one end of the casting trough is lower than its height close to one end of the lifting well.

8. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1, characterized in that: The casting trough cover is a telescopic cover plate.

9. The oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device according to claim 1, characterized in that: The zinc liquid lifting device includes a centrifugal pump and a zinc pump motor for driving the centrifugal pump to rotate. The outlet of the centrifugal pump is connected to the inlet at the bottom of the lifting well. The zinc pump motor is arranged on the top of the smelting furnace.

10. An oxygen-insulating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting system, characterized by: The invention comprises an oxygen-isolating and heat-insulating quasi-slag-free intelligent zinc ingot quantitative casting device as described in any one of claims 1 to 9.

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