Electrolyte raw material drying device and drying method

Abstract

The present application relates to the field of electrolytic raw material drying equipment, and more particularly to an electrolytic raw material drying device and drying method. The device comprises: an elevator connected vertically to the glove box and located on the left side of the glove box; the elevator comprises a lifting mechanism and a hopper; the lifting mechanism drives the hopper to move up and down; the top of the glove box is provided with a transverse truss, and a mechanical clamp is connected to the transverse truss and moves transversely on the transverse truss; a hopper is connected to the bottom of the glove box and communicates with the glove box; a bag-breaking sharp knife is arranged in the hopper; the side wall of the hopper bottom is connected to a feed pipe, one end of the feed pipe is connected to a rotary furnace; a piston is arranged in the feed pipe, a push motor is connected to a crankshaft connecting rod; the crankshaft connecting rod is connected to the piston; the outlet of the rotary furnace is connected to a discharge hopper; an air compressor, a molecular sieve drying device, and the air inlet of the glove box are connected; the air outlet of the glove box and the air outlet of the rotary furnace are respectively connected to a cyclone dust collector, and the outlet of the cyclone dust collector is connected to a fan. The device is used for drying, improving the drying effect and the automation level.

Description

Technical Field

[0001] This invention relates to the field of electrolytic raw material drying equipment, and more particularly to an electrolytic raw material drying apparatus and drying method. Background Technology

[0002] Current methods for drying electrolytic raw materials typically involve manually adding the materials to an oven using a scoop. Given the characteristics of these materials, they need to be turned over at least once per hour during the drying process to prevent or reduce caking. This method relies on manual material handling, which is labor-intensive. Operators face a risk of burns from the high temperature inside the oven when adding materials. Furthermore, given the site conditions, the electrolytic raw materials are prone to caking, potentially resulting in insufficient moisture content. Adding substandard materials to the electrolytic cell can negatively impact subsequent processes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an electrolytic raw material drying device and drying method, which improves the drying effect.

[0004] This invention provides an electrolytic raw material drying apparatus, comprising:

[0005] An elevator is vertically connected to the glove box and located on the left side of the glove box; the elevator includes a lifting mechanism and a hopper; the lifting mechanism drives the hopper to move up and down.

[0006] The top of the glove box is equipped with a transverse truss, and a mechanical gripper is connected to the transverse truss. The mechanical gripper moves laterally on the transverse truss.

[0007] The hopper is connected to the bottom of the glove box and communicates with the glove box.

[0008] The hopper is equipped with a bag-breaking knife.

[0009] The bottom of the hopper is connected to the side wall of the feed pipe, and one end of the feed pipe is connected to the rotary kiln;

[0010] A piston is installed inside the feed pipe.

[0011] The propulsion motor is connected to the crankshaft connecting rod; the crankshaft connecting rod is connected to the piston.

[0012] The outlet of the rotary kiln is connected to the discharge hopper;

[0013] Connect the air inlet of the air compressor, molecular sieve drying device, and glove box;

[0014] The air outlets of the glove box and the rotary kiln are connected to the cyclone dust collector.

[0015] The outlet of the cyclone dust collector is connected to a fan.

[0016] In one specific embodiment of the present invention, a bridge-type steel frame is also included, on which a rotary kiln is fixedly connected.

[0017] The bridge-type steel frame allows for adjustment of the rotary kiln's tilt angle, thereby controlling the drying effect.

[0018] In one specific embodiment of the present invention, the bridge-type steel frame is supported by furnace legs, which are continuously adjustable between 0.5° and 8°.

[0019] In one specific embodiment of the present invention, the rotary kiln is divided into two low-temperature zones and two high-temperature zones, with two continuous low-temperature zones near the inlet and two continuous high-temperature zones near the outlet.

[0020] The different zones are separated by ceramic fiberboard.

[0021] In one specific embodiment of the present invention, a plate is installed inside the rotary kiln chamber and connected by movable bolts.

[0022] In one specific embodiment of the present invention, the gap between the tabs is 10-30 mm.

[0023] In one specific embodiment of the present invention, the elevator includes a cuboid box, and the box contains a lifting mechanism and a hopper;

[0024] The lifting mechanism is a toothed chain, which is vertically arranged, and the hopper is engaged in the toothed chain.

[0025] In one specific embodiment of the present invention, the bag-breaking knife is vertically installed in the hopper via a bracket.

[0026] This invention also provides a method for drying electrolytic raw materials, which utilizes the electrolytic raw material drying apparatus described above for drying treatment, and includes the following steps:

[0027] Step 1: Preheat the rotary kiln;

[0028] Step 2: The material is placed in the hopper, lifted to the glove box, and the material is picked up and taken to the hopper to break the bag. The material after breaking the bag enters the hopper.

[0029] Step 3: Start the feeding process. The propulsion motor drives the piston to push the material into the rotary kiln, where the material is dried.

[0030] During steps two and three, dry air is continuously introduced into the device: on the one hand, after the dry air is introduced into the glove box, it is directly transferred to the cyclone dust collector for dust removal and then discharged through the fan; on the other hand, after the dry air is introduced into the glove box, it passes through the rotary kiln, and after being removed by the cyclone dust collector, it is discharged through the fan.

[0031] In one specific embodiment of the present invention, the rotary kiln rotates at a frequency of 5-20Hz, the propulsion motor runs for 5-10s, and the interval is 240s-300s. The material is added into the rotary kiln, and the moisture content of the electrolytic raw material is controlled at 0.1% by adjusting the angle of the rotary kiln.

[0032] Compared with the prior art, the electrolytic raw material drying apparatus and drying method of the present invention have the following beneficial effects:

[0033] (1) It integrates automatic feeding, air drying and other devices into a single structure, realizing full-process automation;

[0034] (2) Drying is carried out by two methods: rotary kiln and large airflow. The rotary kiln adopts a two-stage system of low temperature and high temperature, and the material drying requirements are achieved by adjusting the tilt, rotation speed and temperature of the high and low temperature zones of the rotary kiln. The large airflow method uses air compressor and molecular sieve drying device to remove oil and dry the air, thereby inhibiting ion adhesion and reducing or preventing material caking. At the same time, the evaporated water in the rotary kiln is carried away by the fan, which is conducive to improving the drying effect. Attached Figure Description

[0035] Figure 1 Schematic diagram of an electrolytic raw material drying device;

[0036] Figure 2 This diagram shows the structure of the hoist.

[0037] Figure 3 This indicates the internal structure of the rotary kiln;

[0038] In the diagram, 1-air compressor; 2-molecular sieve drying device; 3-elevator; 4-glove box; 5-transverse truss; 6-mechanical gripper; 7-hopper; 8-bag breaking knife; 9-cyclone dust collector; 10-fan; 11-propulsion motor; 12-crankshaft connecting rod; 13-feed pipe; 14-rotary furnace; 15-discharge hopper; 16-bridge structure steel frame; 17-toothed chain; 18-hopper; 19-blade. Detailed Implementation

[0039] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0040] An embodiment of the present invention discloses an electrolytic raw material drying apparatus, such as... Figures 1-3 As shown, it includes:

[0041] Elevator 3 is vertically connected to the glove box 4 and located on the left side of the glove box 4. A door is provided at the connection between the two to isolate elevator 3 and glove box 4. The door opens when feeding and closes after feeding is completed.

[0042] The elevator 3 includes a rectangular box, inside which a lifting mechanism and a hopper are installed;

[0043] The lifting mechanism is a toothed chain 17, which is vertically arranged, and the hopper 18 is engaged in the toothed chain 17.

[0044] The glove box 4 is a rectangular box with a horizontal truss 5 on the top. A mechanical gripper 6 is connected to the horizontal truss 5 and moves laterally on the horizontal truss 5.

[0045] After the mechanical gripper 6 picks up the material conveyed by the hopper 18, it moves to directly above the hopper 7, and the mechanical gripper 6 releases, allowing the material to fall into the hopper 7 under the action of gravity.

[0046] The hopper 7 is located at the end of the glove box 4 away from the elevator 3, and is connected to the bottom of the glove box 4 and communicates with the glove box 3.

[0047] The hopper 7 is equipped with a bag-breaking knife 8;

[0048] The end of the bag-breaking knife 8 is diamond-shaped and is vertically installed in the hopper 7 by a bracket;

[0049] The bottom of the hopper 7 is connected to the side wall of the feed pipe 13, and one end of the feed pipe 13 is connected to the rotary kiln 14;

[0050] A piston is installed inside the feed pipe 13.

[0051] The propulsion motor 11 is connected to the crankshaft connecting rod 12;

[0052] Crankshaft connecting rod 12 is connected to the piston;

[0053] The propulsion motor 11 drives the piston to move, pushing the material in the feed pipe 13 into the rotary kiln 14;

[0054] The rotary kiln 14 is an electric rotary kiln with a bridge-type base. The outer layer of the heating zone is a steel shell, and the inner insulation material is ceramic fiber. The normal operating temperature is 1100℃, and the maximum operating temperature is 1300℃.

[0055] The furnace is divided into four heating zones along the axis of the rotary tube for temperature control, and the zones are separated by ceramic fiber plates. The four heating zones are two low-temperature zones and two high-temperature zones. The two low-temperature zones are near the inlet and the two high-temperature zones are near the outlet.

[0056] The heating element is an electric heating plate with pre-embedded resistance wire. There are 3 groups of heating elements, with 6 electric heating plates in each group, for a total of 18. Six heating plates are distributed in each heating temperature zone. The power of a single electric heating plate is 5-10KW. The heating elements are connected in a Y-shape. Thermocouples are installed at equal intervals in each temperature zone, and the temperature is controlled in real time by a PLC.

[0057] In terms of mechanical control, the rotary kiln's transmission is driven by a braked servo motor and a planetary gear reducer, which rotates the furnace tubes via sprockets and chains.

[0058] The rotary kiln 14 has plates 19 installed inside the furnace chamber, which are connected by movable bolts; the gap between the plates 19 is 10-30mm to prevent materials from caking and sticking to the furnace wall.

[0059] The residence time of the material in the rotary kiln 14 can be adjusted by adjusting the tilt angle and rotation speed of the rotary kiln 14, thereby achieving different drying requirements for the material;

[0060] The bottom of the rotary kiln 14 is connected to a bridge-type steel frame 16.

[0061] The bridge-type steel frame 16 can adjust the tilt angle of the rotary kiln 14, thereby controlling the drying effect.

[0062] The bridge-type steel frame 16 is supported by furnace feet, which can be continuously adjusted between 0.5 and 8 degrees. Meanwhile, a retaining plate 19 is installed inside the furnace to prevent materials from caking and sticking to the furnace wall.

[0063] The outlet of the rotary kiln 14 is connected to the discharge hopper 15;

[0064] Specifically, the propulsion motor 11 is connected to the crankshaft connecting rod 12 by fastening bolts, the crankshaft connecting rod 12 is connected to the reciprocating piston by fastening bolts, the feed pipe 13 and the discharge bin 15 are respectively welded to the left and right sides of the rotary kiln 14, and the rotary kiln 14 is parallel to the glove box 4 and located at the lower part of the outside of the glove box 4.

[0065] Connect the air inlet of air compressor 1, molecular sieve drying device 2, and glove box 4;

[0066] The air outlet of glove box 4 and the air outlet of rotary kiln 14 are respectively connected to cyclone dust collector 9.

[0067] The outlet of the cyclone dust collector 9 is connected to the fan 10.

[0068] The air compressor 1 is preferably an oil-free air compressor.

[0069] Air compressor 1 transfers air to molecular sieve drying device 2 for drying, and then to elevator 3 and glove box 4. The air in glove box 4 is transferred to cyclone dust collector 9 for dust removal and then discharged through fan 10. The air in glove box 4 enters rotary kiln 14 from hopper 7, and is then discharged through cyclone dust collector 9 for dust removal and then through fan 10.

[0070] Embodiments of the present invention also provide a method for drying electrolytic raw materials, utilizing the apparatus described above, comprising the following steps:

[0071] Step 1: Preheat the rotary kiln;

[0072] Set all four temperature control zones of the rotary kiln to 150℃, and simultaneously start the compressed air drying system to preheat the entire device for 2 hours; after 2 hours, set the temperature of the low temperature zone to 200℃ and 300℃ respectively, and the temperature of the high temperature zone to 450℃ and 550℃ respectively, and keep them at these temperatures for 1-3 hours.

[0073] Step 2: The material is placed in the hopper, lifted to the glove box, and the material is picked up and taken to the hopper to break the bag. The material after breaking the bag enters the hopper.

[0074] Step 3: Start the feeding process. The propulsion motor drives the piston to push the material into the rotary kiln, where the material is dried.

[0075] The rotary kiln rotates at a frequency of 5-20Hz, the propulsion motor runs for 5-10 seconds, and the interval is 240-300 seconds. The material is added into the rotary kiln, and the moisture content of the electrolytic raw material is controlled at 0.1% by adjusting the angle of the rotary kiln.

[0076] During steps two and three, dry air is continuously introduced into the device: on the one hand, after the dry air is introduced into the glove box, it is directly transferred to the cyclone dust collector for dust removal and then discharged through the fan; on the other hand, after the dry air is introduced into the glove box, it passes through the rotary kiln, and after being removed by the cyclone dust collector, it is discharged through the fan.

[0077] The electrolytic raw material drying device and method of the present invention adopts a toothed chain for vertical lifting and mechanical grippers for moving in a transverse truss to realize the material feeding process. The material is pushed into the rotary drying furnace by a reciprocating piston. The rotary drying furnace is a two-stage type, namely a primary low-temperature zone and a secondary high-temperature zone. The material drying requirements are achieved by adjusting the tilt angle, rotation speed and the temperature of the high and low temperature zones of the rotary furnace. The compressed air dried by molecular sieves removes the moisture from the entire device, ensuring the atmosphere inside the device and removing the moisture evaporated during drying. The dried material enters the outlet hopper.

[0078] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0079] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrolytic raw material drying device, characterized in that, include: An elevator is vertically connected to the glove box and located on the left side of the glove box; the elevator includes a lifting mechanism and a hopper; the lifting mechanism drives the hopper to move up and down. The top of the glove box is equipped with a transverse truss, and a mechanical gripper is connected to the transverse truss. The mechanical gripper moves laterally on the transverse truss. The hopper is connected to the bottom of the glove box and communicates with the glove box. The hopper is equipped with a bag-breaking knife. The bottom of the hopper is connected to the side wall of the feed pipe, and one end of the feed pipe is connected to the rotary kiln; A piston is installed inside the feed pipe. The propulsion motor is connected to the crankshaft connecting rod; the crankshaft connecting rod is connected to the piston. The outlet of the rotary kiln is connected to the discharge hopper; Connect the air inlet of the air compressor, molecular sieve drying device, and glove box; The air outlets of the glove box and the rotary kiln are connected to the cyclone dust collector. The outlet of the cyclone dust collector is connected to a fan.

2. The electrolytic raw material drying apparatus according to claim 1, characterized in that, It also includes a bridge-type steel frame, on which a rotary kiln is fixedly connected; The bridge-type steel frame allows for adjustment of the rotary kiln's tilt angle, thereby controlling the drying effect.

3. The electrolytic raw material drying apparatus according to claim 2, characterized in that, The bridge-type steel frame is supported by furnace legs, which are continuously adjustable between 0.5 and 8 degrees.

4. The electrolytic raw material drying apparatus according to claim 1, characterized in that, The rotary kiln is divided into two low-temperature zones and two high-temperature zones. Near the inlet, there are two continuous low-temperature zones, and near the outlet, there are two continuous high-temperature zones. The different zones are separated by ceramic fiberboard.

5. The electrolytic raw material drying apparatus according to claim 1, characterized in that, The rotary kiln chamber is equipped with plates that are connected by movable bolts.

6. The electrolytic raw material drying apparatus according to claim 5, characterized in that, The gap between the tabs is 10-30mm.

7. The electrolytic raw material drying apparatus according to claim 1, characterized in that, The elevator includes a rectangular box, inside which a lifting mechanism and a hopper are installed; The lifting mechanism is a toothed chain, which is vertically arranged, and the hopper is engaged in the toothed chain.

8. The electrolytic raw material drying apparatus according to claim 1, characterized in that, The bag-breaking knife is vertically installed in the hopper via a bracket.

9. A method for drying electrolytic raw materials, characterized in that, The drying process using the electrolytic raw material drying apparatus according to any one of claims 1 to 8 includes the following steps: Step 1: Preheat the rotary kiln; Step 2: The material is placed in the hopper, lifted to the glove box, and the material is picked up and taken to the hopper to break the bag. The material after breaking the bag enters the hopper. Step 3: Start the feeding process. The propulsion motor drives the piston to push the material into the rotary kiln, where the material is dried. During steps two and three, dry air is continuously introduced into the device: on the one hand, after the dry air is introduced into the glove box, it is directly transferred to the cyclone dust collector for dust removal and then discharged through the fan; on the other hand, after the dry air is introduced into the glove box, it passes through the rotary kiln, and after being removed by the cyclone dust collector, it is discharged through the fan.

10. The method for drying electrolytic raw materials according to claim 9, characterized in that, The rotary kiln rotates at a frequency of 5-20Hz, the propulsion motor runs for 5-10 seconds, and the interval is 240-300 seconds. The material is added into the rotary kiln, and the moisture content of the electrolytic raw material is controlled at 0.1% by adjusting the angle of the rotary kiln.

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