Production device of lithium battery negative electrode material

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses a lithium battery cathode material production device which comprises a high softening point asphalt storage tank which is sequentially communicated to a coarse grinder, a micro grinder, an oxidizing furnace, a crusher, a bag-type dust collector, a vibrating screen, a magnetic separator and a finished product bin through a conveying device, wherein the vibrating screen is provided with a coarse material outlet and a micro powder outlet, the coarse material outlet is communicated to a feed port of the crusher, and the micro powder outlet is communicated to a feed port of the magnetic separator. According to the utility model, the high-softening-point asphalt can be prepared into the lithium battery negative electrode material; new application is developed for the asphalt, the produced product meets the market demand, and the enterprise benefit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical equipment, concretely relates to a production device of lithium battery negative material. BACKGROUND

[0002] As an important component of lithium ion battery, the negative material is various, and the common negative material includes carbon negative material, tin-based negative material, lithium transition metal nitride negative material, alloy negative material and nano negative material; the negative material actually used in lithium ion battery is generally carbon material, such as graphite, soft carbon (such as coke, etc.), hard carbon, etc. High softening point pitch obtained in the processing of coal tar is a mixture of various mixed aromatic hydrocarbons, which can be used as raw material of suitable lithium battery negative material because of containing rich carbon element, but there is no production process and equipment for separating high softening point pitch from tar processing and preparing lithium battery negative material, therefore, it is necessary to develop corresponding production equipment and production process to separate high softening point pitch and further prepare lithium battery negative material, meet market demand and improve enterprise benefit. SUMMARY

[0003] The utility model solves the technical problem that provide a production device of lithium battery negative material, can produce high softening point pitch into lithium battery negative material, increase the application range of pitch, satisfy market demand, improve enterprise benefit.

[0004] To solve the above technical problem, the technical scheme of the utility model is:

[0005] A production device of lithium battery negative material, including high softening point pitch storage tank, high softening point pitch storage tank is communicated to rough crusher, micro grinder, oxidation furnace, crusher, bag type dust collector, vibrating screen, magnetic separator and finished product bin in proper order through conveying device, the discharge port of high softening point pitch storage tank is communicated to the feed inlet of rough crusher, the discharge port of rough crusher is communicated to the feed inlet of micro grinder, the discharge port of micro grinder is communicated to the feed inlet of oxidation furnace, the discharge port of oxidation furnace is communicated to the feed inlet of crusher, the discharge port of crusher is communicated to the feed inlet of bag type dust collector, the discharge port of bag type dust collector is communicated to the feed inlet of vibrating screen, vibrating screen is equipped with coarse material outlet and micro powder outlet, coarse material outlet is communicated to the feed inlet of crusher, micro powder outlet is communicated to the feed inlet of magnetic separator, the feed inlet of magnetic separator is communicated to the feed inlet of finished product bin.

[0006] Preferably, the discharge port of the high softening point pitch storage tank is communicated to the feed inlet of the rough crusher through a conveyor belt, the discharge port of the rough crusher is communicated to the feed inlet of the micro grinder through a negative pressure pneumatic conveying pipeline (a negative pressure generated by a Roots blower below a feed dust removal bag of the micro grinder, the blower model: MFSR-200-1, air volume: 10m 3The micro-pulverizer is connected to the inlet of the micro-pulverizer, the outlet of the micro-pulverizer is connected to the inlet of the oxidation furnace through a positive pressure pneumatic conveying pipeline (positive pressure generated by a Roots blower and a rotary feeder below the discharge dust bag of the micro-pulverizer), the outlet of the oxidation furnace is connected to the inlet of the crusher through a conveying pipeline, the outlet of the crusher is connected to the inlet of the bag dust collector through a negative pressure pneumatic conveying pipeline (negative pressure generated by a Roots blower of the bag dust collector), the outlet of the bag dust collector is connected to the inlet of the vibrating screen through a star-shaped discharge valve and a pipeline, the micro-powder outlet of the vibrating screen is connected to the inlet of the magnetic separator through a pipeline and a Roots blower (negative pressure pneumatic conveying) on the pipeline, and the outlet of the magnetic separator is connected to the inlet of the finished product bin through a pipeline and a Roots blower (negative pressure pneumatic conveying) on the pipeline. (Both of the above two Roots blowers are Model: MFSR-200-1, air volume: 3200m 3 / min, air pressure: 4500pa, manufacturer: Shandong Mingfeng Machinery Manufacturing Co., Ltd.)

[0007] Preferably, the inlet of the micro-pulverizer is provided with an inlet dust removal bag (which separates gas from the material and separates the gas for extraction and emptying), and the inlet dust removal bag collects the particles and sends the coarsely crushed product into the micro-pulverizer through a star-shaped discharge valve and a pipeline provided on the inlet dust removal bag. The micro-pulverizer is crushed into 8-12μm micro-powder, which is conveyed to the outlet dust removal bag (which separates gas and dust, and the dust is filtered into the bag, and the gas is evacuated) provided at the outlet of the micro-pulverizer. A Roots blower and a rotary feeder are provided below the outlet dust removal bag, and the rotary feeder conveys the micro-powder to the oxidation furnace through a positive pressure conveying system.

[0008] Preferably, the inlet of the oxidation furnace is provided with an inlet dust removal bag (which separates gas from the material, separates the gas for extraction and emptying, and collects the material for the next process); the inlet dust removal bag collects the micro-powder and supplies the oxidation furnace through a star-shaped discharge valve and a pipeline below the inlet dust removal bag.

[0009] Preferably, the oxidation furnace is provided with an oxidation furnace tray and a material conveying belt, and is also provided with a compressed air input device. The oxidation furnace is Model YHL-500, and the manufacturer is Zibo Lianxing Kiln Industry Technology Co., Ltd.

[0010] Preferably, the crusher is a hammer crusher, Model CSPS-50, and the manufacturer is Zibo Lianxing Kiln Industry Technology Co., Ltd.

[0011] Preferably, the rough crusher is model NMRV063-20-80B5, produced by Zibo Lianxing Kiln Industry Technology Co., Ltd.; the micro crusher is model LHJ-50, produced by Zibo Lianxing Kiln Industry Technology Co., Ltd.; the bag dust collector is model BDCC-3, produced by Zibo Lianxing Kiln Industry Technology Co., Ltd.; the vibrating screen is model CS-800, produced by Zibo Lianxing Kiln Industry Technology Co., Ltd.; and the magnetic separator is model CXJ-160, produced by Zibo Lianxing Kiln Industry Technology Co., Ltd.

[0012] With the technical scheme, the utility model has the advantages of:

[0013] In summary, the utility model pulverizes high-softening-point asphalt into micro powder of 8-12 μm, and then performs chemical reaction in an oxidation furnace at a temperature range of 700-1200 DEG C. Under high temperature and certain time conditions, carbon and hydrogen atoms in the asphalt molecules are broken and recombined to form new carbon structures, and the asphalt is completely converted into carbon at about 1000 DEG C. The purpose of this step is to further enhance the stability and performance of the material. Water and volatile substances are removed through high-temperature treatment to form the final crude product (carbon structure material) of the lithium battery negative electrode material. Then, the micro powder of 5-10 μm is screened out through crushing and screening, and the finished product of the lithium battery negative electrode material is obtained after removing metal impurities by the magnetic separator. The utility model develops an equipment for preparing lithium battery negative electrode material from high-softening-point asphalt. Through the equipment, high-softening-point asphalt can be prepared into lithium battery negative electrode material. The utility model develops a new use of asphalt, and the produced product meets market demand, improving enterprise benefits. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the utility model;

[0015] In the figure, 1 is a high-softening-point asphalt storage tank; 2 is a rough crusher; 3 is a micro crusher; 4 is an oxidation furnace; 5 is a crusher; 6 is a bag dust collector; 7 is a vibrating screen; 8 is a magnetic separator; and 9 is a finished product bin. DETAILED DESCRIPTION

[0016] The utility model is further described below in combination with the drawings and examples.

[0017] Example 1

[0018] As Figure 1As shown, the utility model is a kind of production device of lithium battery negative material, including high softening point pitch storage tank 1, high softening point pitch storage tank 1 is sequentially communicated to rough pulverizer 2, micro pulverizer 3, oxidation furnace 4, crusher 5, cloth bag dust collector 6, vibrating screen 7, magnetic separator 8 and finished product bin 9 by conveying device (not marked), the discharge port (not marked) of high softening point pitch storage tank 1 is communicated to the feed inlet (not marked) of rough pulverizer 2, the discharge port of rough pulverizer 2 is communicated to the feed inlet of micro pulverizer 3, the discharge port of micro pulverizer 3 is communicated to the feed inlet of oxidation furnace 4, the discharge port of oxidation furnace 4 is communicated to the feed inlet of crusher 5, the discharge port of crusher 5 is communicated to the feed inlet of cloth bag dust collector 6, the discharge port of cloth bag dust collector 6 is communicated to the feed inlet of vibrating screen 7;Vibrating screen is equipped with coarse material outlet and micro powder outlet, coarse material outlet is communicated to the feed inlet of crusher, micro powder outlet is communicated to the feed inlet of magnetic separator 8;The feed inlet of magnetic separator 8 is communicated to the feed inlet of finished product bin 9.

[0019] Actual production process is: after the high softening point pitch obtained in previous process is cooled and condensed and broken, break into 5~10cm's broken block and temporarily store in high softening point pitch storage tank 1, when needed, by conveying belt to rough pulverizer 2, into 5~10mm's small particle after being crushed by rough pulverizer, then the particle is transported to the feed dust cloth bag of micro pulverizer 3 by negative pressure pneumatic conveying system, after the particle is collected by the feed dust cloth bag of micro pulverizer 3, the rough pulverized product is sent into micro pulverizer 3 by star type unloading valve and pipeline, into 8~12μm's micro powder after being crushed by micro pulverizer 3, then the micro powder is transported to the feed dust cloth bag of oxidation furnace 4 by positive pressure through the roots blower of the discharge dust cloth bag and the rotary feeder arranged below the discharge dust cloth bag, after being collected by the feed dust cloth bag of oxidation furnace 4, the micro powder is transported to oxidation furnace 4 for oxidation reaction by star type unloading valve and pipeline arranged below the feed dust cloth bag of oxidation furnace 4;After the micro powder enters oxidation furnace 4, fall into oxidation furnace tray, set track in oxidation furnace 4, the micro powder is transferred from oxidation furnace tray to track and slowly moves forward by the driving of track, the micro powder is oxidized in high temperature compressed air (about 1000 DEG C) in oxidation furnace 4 in the process of moving forward, form carbon structure's lithium battery negative material rough product after 5 hours of reaction, fall into the crusher 5 arranged below oxidation furnace 4, after the agglomerated rough product is broken, by negative pressure pneumatic conveying to cloth bag dust collector 6, after being collected by cloth bag dust collector 6, by the star type unloading valve below cloth bag dust collector 6 to vibrating screen 7, remove large particles (back to crusher 5 and break again) by vibrating screen 7, after the micro powder obtained by screening is removed by magnetic separator 8, is transported to finished product bin 9 and temporarily stored.

[0020] It should be understood that the embodiments are only used for illustrating the present application and are not used for limiting the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various changes or modifications to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims

1. A production device for lithium battery negative electrode materials, characterized in that: The high softening point pitch storage tank is connected to the coarse pulverizer, the micro-pulverizer, the oxidation furnace, the crusher, the bag dust collector, the vibrating screen, the magnetic separator and the finished product bin in sequence through conveying devices.

2. The apparatus for producing a lithium battery negative material according to claim 1, wherein: The discharge port of the high softening point pitch storage tank is connected to the feed inlet of the coarse pulverizer through a conveying belt, the discharge port of the coarse pulverizer is connected to the feed inlet of the micro-pulverizer through a negative pressure pneumatic conveying pipeline, the discharge port of the micro-pulverizer is connected to the feed inlet of the oxidation furnace through a positive pressure pneumatic conveying pipeline, the discharge port of the oxidation furnace is connected to the feed inlet of the crusher through a conveying pipeline below the discharge port, the discharge port of the crusher is connected to the feed inlet of the bag dust collector through a negative pressure pneumatic conveying pipeline, the discharge port of the bag dust collector is connected to the feed inlet of the vibrating screen through a star-shaped discharge valve and a pipeline below the discharge port, the micro-powder outlet of the vibrating screen is connected to the feed inlet of the magnetic separator through a pipeline and a Roots blower arranged on the pipeline, and the discharge port of the magnetic separator is connected to the feed inlet of the finished product bin through a pipeline and a Roots blower arranged on the pipeline.

3. The apparatus for producing a lithium battery negative material according to claim 1, wherein: A feeding dust removal bag is arranged at the feed inlet of the micro-pulverizer, and a discharge dust removal bag is arranged at the discharge port of the micro-pulverizer.

4. The apparatus for producing a lithium battery negative material according to claim 1, wherein: The feed inlet of the oxidation furnace is provided with a feeding dust removal bag.

5. The apparatus for producing a lithium battery negative material according to claim 1, wherein: The oxidation furnace is provided with an oxidation furnace tray and a material conveying track, and is also provided with a compressed air input device.

6. The apparatus for producing a lithium battery negative material according to claim 1, wherein: The crusher is a hammer crusher.

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