CN206911535U - A kind of needle coke spheroidising complete set of equipments - Google Patents

Abstract

The utility model discloses a kind of needle coke spheroidising complete set of equipments, it includes the hopper being sequentially connected by pipeline from after going to, Ultrafine Grinding, cyclone collector, super-fine classified mill, gas flow sizing machine and pulse bag type dust collector, the bottom discharging port of the cyclone collector is connected with the first lock wind discharge valve, the discharge end of first lock wind discharge valve send pipeline to be connected with super-fine classified mill by wind, the top discharge port of cyclone collector is connected with pulse dust collector, the top sidepiece of gas flow sizing machine is connected with discharge nozzle, bottom is connected with drainage conduit, discharge nozzle is connected with pulse bag type dust collector, the second lock wind discharge valve is connected with drainage conduit.The utility model has the advantages of high shaping efficiency high, spheroidization degree, high income.

Description

A complete set of needle-shaped coke spheroidization treatment equipment

technical field

The utility model belongs to the technical field of processing equipment for negative electrode materials of lithium-ion batteries, and in particular relates to a complete set of needle-shaped coke spheroidization treatment equipment for hell and the above-mentioned negative electrode materials.

Background technique

Because of its advantages of easy graphitization and high degree of graphitization, oil-based needle coke is regarded as an excellent material for the production of lithium battery negative electrodes by major domestic manufacturers. The spheroidization of needle coke is to first crush the needle coke raw material to a suitable particle size , and then de-angularized to make it finally form an ellipsoid or spherical shape. After the needle coke is spheroidized, the tap density can be increased. The greater the tap density, the more the assembly quantity and the greater the total capacity of the battery. At the same time, the anisotropy of layered needle coke can be resolved after spheroidization, so that lithium ions are rarely restricted by the direction when they enter and exit the graphite layer, which improves the working performance of lithium-ion batteries.

At present, domestic and foreign needle coke spheroidization processing equipments have defects such as low D ₀₀ , high D ₁₀₀ , low tap density, etc., especially the low yield (the total yield is generally lower than 65%, Some processes only reach below 55%), which is extremely unfavorable to further promote the application of oil-based needle coke in lithium battery anode materials.

Utility model content

The technical problem to be solved by the utility model is to provide a complete set of needle coke spheroidization treatment equipment, which can increase the product yield as much as possible under the premise of ensuring the needle coke particle size distribution and tap density, so as to improve the needle coke utilization rate ,reduce manufacturing cost.

In order to solve the above technical problems, the needle-shaped coke spheroidization processing equipment provided is characterized in that it includes a hopper, an ultra-fine mill, a cyclone collector, an ultra-fine grading mill, and an airflow classifier connected sequentially through pipelines. And the pulse bag filter, the lower discharge port of the cyclone collector is connected with the first air-lock discharge valve, and the discharge end of the first air-lock discharge valve is connected with the ultra-fine class mill through the air pipeline, The top discharge port of the cyclone collector is connected with a pulse dust collector, the upper side of the air classifier is connected with a discharge pipe, the bottom is connected with a discharge pipe, the discharge pipe is connected with the pulse bag filter, and the discharge pipe is connected with There is a second air lock discharge valve.

After adopting the above-mentioned structure, the material is ultra-finely ground by the ultra-fine mill and separated and collected by the cyclone collector, so that the material is fully pulverized and separated, and then the ultra-fine grading mill is used as the spherical host to impact, shear, Grinding is its spheroidizing mechanism, integrated design of crushing and grading, high shaping efficiency, high degree of spheroidization, and high yield. The airflow classifier is set to remove the ultrafine powder peeled off during the shaping process, so that D ₀₀ can be further improved Finally, needle-shaped coke-spheroidized products with normal distribution of particle size are obtained.

The discharge port of the lower part of the cyclone collector is connected with a first air lock discharge valve, the discharge end of the first air lock discharge valve is connected with the ultra-fine grade mill through the air delivery pipeline, and the top discharge of the cyclone collector The port is connected with a pulse dust collector.

The first air-lock discharge valve includes a valve body shell with upper and lower ends open. The middle part of the valve body shell is provided with a circular valve body cavity, and a valve body driven by a discharge power mechanism is rotatably connected to the valve body cavity. The valve shaft is equipped with a plurality of valve plates distributed along its ring and sealingly attached to the inner wall of the inner cavity of the valve body at the end.

The ultra-fine grading mill includes a crushing cylinder connected to the frame of the grading mill, a grading grinding shaft driven by a power device of the grading mill is installed in the crushing cylinder, a hammerhead disk is installed on the grading grinding shaft, and a hammerhead disk is installed on the hammerhead disk. A plurality of hammerheads are distributed along its ring, and the inner wall of the crushing cylinder is equipped with a toothed liner that matches the hammerheads. The upper part of the crushing cylinder is provided with a secondary air inlet pipe that blows into its inner cavity and is connected to the fan. , the rear part of the crushing cylinder is also equipped with a classification device.

The classification device includes a cone-shaped shroud connected to the inner wall of the crushing cylinder, the large mouth of the cone-shaped shroud is set towards the hammer plate, and the crushing cylinder is also rotated and connected with a classification power shaft driven by a classification power device. There is a classification drum connected to the power shaft of the classification power shaft, the inner extension end of the classification drum extends into the conical shroud, the side wall is provided with a feed port, and the outer wall of the crushing drum is connected with a The discharge cylinder with the inner cavity of the grading drum connected.

The ultra-fine mill includes a feed screw connected to the ultra-fine mill frame, the discharge end of the hopper is connected to the feed screw, the ultra-fine mill frame is connected with a grinding cylinder, and the inner extension of the feed screw The end is the discharge port and the discharge port is located above the grinding cylinder. A baffle plate is hinged at the discharge port of the feeding screw. When the material baffle plate falls freely, the discharge port can be blocked. The grinding cylinder is equipped with a grinding power The grinding shaft driven by the mechanism, the grinding shaft is connected with a plurality of pressure rollers along its ring through the support arm, the inner wall of the grinding cylinder is equipped with a grinding ring that matches the pressure roller, and the ultra-fine grinding frame is equipped with an ultra-fine grinding cylinder above the grinding cylinder. subdivision device.

The ultra-fine classification device includes a classification cylinder connected above the grinding cylinder, a conical cover is installed in the classification cylinder, and the small opening of the conical cover is set towards the grinding cylinder, and a classification roller driven by a superfine classification power mechanism is installed on the classification cylinder , the inner end of the grading drum extends into the conical cover, the side wall is provided with a feed port, and the side wall of the grading drum is connected with a discharge pipe.

The upper side of the air classifier is connected with a discharge pipe, the bottom is connected with a discharge pipe, the discharge pipe is connected with a pulse bag filter, and the discharge pipe is connected with a second air lock discharge valve.

The complete set of needle coke spheroidization treatment equipment provided by the utility model crushes the granular needle coke to D ₀₀ =4.03, D ₁₀ =8.8, D ₅₀ =18.5, D ₉₀ =35.5 through an ultrafine mill and a cyclone collector. The yield is 88%, the tap density: 0.88; the crushed needle coke is added to the ultra-fine mill for spheroidization, after one round of shaping, D ₀₀ =3.55, D ₁₀ =7.7, D ₅₀ =17, D ₉₀ =33.2, D ₁₀₀ =58.9, yield: 92%, tap density: 0.96; total yield >75%. Compared with user indicators (D ₀₀ >2.0, D ₁₀ =7~9, D ₅₀ =16~19, D ₉₀ =28~34, D ₁₀₀ <62, tap density: 0.95), it achieves a relatively ideal effect.

In summary, the utility model has the advantages of high shaping efficiency, high degree of spheroidization, and high yield.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the structural representation of a kind of embodiment of the utility model;

Fig. 2 is the structural representation of ultrafine mill in Fig. 1 embodiment;

Fig. 3 is the schematic structural view of the ultra-fine grading mill in the embodiment of Fig. 1;

Fig. 4 is a schematic structural view of the first air lock discharge valve in the embodiment of Fig. 1;

Fig. 5 is a structural schematic view taken along line A-A in Fig. 4 .

detailed description

Referring to accompanying drawing 1, the utility model provides an embodiment of a complete set of needle-shaped coke spheroidization treatment equipment, which includes a hopper 1, an ultrafine mill 2, a cyclone collector 3, an ultrafine Classifying mill 4, airflow classifier 5 and pulse bag filter 6, the pulse bag filter 6 is connected with a discharge pipe through an induced draft discharge fan, and the lower discharge port of the cyclone collector 3 is connected with a first The air-lock discharge valve 8, the discharge end of the first air-lock discharge valve 8 is connected with the superfine grade mill 4 through the air delivery pipeline 9, and the air delivery pipeline 9 refers to that there is a fan connected to the pipeline, and the blower will The material is transported through the pipeline, the top discharge port of the cyclone collector 3 is connected with the pulse dust collector 11, the upper side of the air classifier 5 is connected with the discharge pipe, and the bottom is connected with the discharge pipe 7, and the discharge pipe is connected with the pulse dust collector 11. The bag filter 6 is connected, and the discharge pipe 7 is connected with a second air-lock discharge valve 10, the structure of the second air-lock discharge valve is the same as that of the first air-lock discharge valve. The specific structures of the cyclone collector 3 , the air classifier 5 , the pulse bag filter 6 and the pulse filter 11 mentioned above are all existing technologies, and will not be repeated here.

With reference to Fig. 2, described ultra-fine classifying mill 4 comprises the crushing cylinder 42 that is connected on the classifying mill frame 41, and the classifying mill shaft 43 that is driven by the classifying mill power unit is housed in the pulverizing cylinder 42, and the classifying mill power unit is classification Grinding motor, grading grinding shaft 43 is equipped with a hammer head plate 44, and a plurality of hammer heads 45 along its ring are installed on the hammer head plate 44, and a toothed liner 46 matching with the hammer heads is installed on the inner wall of the crushing cylinder 42. The top of the crushing cylinder 42 is provided with a secondary air inlet pipe 47 blowing to its inner cavity and connected with a fan, and a classification device is also installed at the rear of the crushing cylinder 42; The conical flow guide cover 48 on the inner wall of the body 42, the large mouth of the conical flow guide cover is arranged towards the hammerhead disk, and the classification power shaft 49 driven by the classification power device is also rotated on the crushing cylinder body 42, and the classification power device is A classification motor, a classification drum 40 is connected to the classification power shaft 49, and the inner extension end of the classification drum extends into the conical shroud, and the side wall is provided with a feed port, and the crushing cylinder 42 The outer wall is connected with a discharge cylinder communicating with the inner cavity of the classifying drum. Through the setting of the above structure, the material can be crushed and classified, which has the characteristics of high crushing efficiency, narrow range of classification particle size, and the shape of the finished product is conducive to spheroidization.

With reference to Fig. 3, described superfine mill 2 comprises the feeding screw 21 that is connected on the superfine mill frame 20, and the discharging end of described hopper 1 is connected on the feed screw, and the ultrafine mill frame 20 is connected with Grinding cylinder 22, the inner extension end of the feeding screw is the discharge port and the discharge port is located above the grinding cylinder, the discharge port of the feeding screw is hinged with a baffle plate 30, which can be blocked when the material baffle plate falls freely At the discharge port, the grinding cylinder 22 is equipped with a grinding shaft 23 driven by a grinding power mechanism. The grinding power mechanism is a grinding motor, and the grinding shaft 23 is connected with a plurality of pressure rollers 24 along its ring cloth through a support arm. There is a grinding ring 25 cooperating with the pressure roller, and the superfine grading device positioned above the grinding cylinder is installed on the superfine mill frame 20 . The ultra-fine classification device includes a classification cylinder connected above the grinding cylinder, a cone cover 26 is housed in the classification cylinder, and the small mouth of the cone cover is arranged towards the grinding cylinder, and the classification cylinder driven by the ultra-fine classification power mechanism is installed on the classification cylinder. Cylinder 27, the inner extension end of the grading cylinder 27 stretches into the said conical cover, the side wall is provided with a feeding port, and the side wall of the grading cylinder is connected with a discharge pipe. Utilize the ultra-fine grading mill as the spheroidizing main machine, and the crushing, spheroidizing, and shaping pairs are composed of the hammer head and the tooth-shaped liner. The mechanism of spheroidizing and shaping is impact collision, shearing, and grinding. The integrated design of crushing and grading has the function of shaping. With the characteristics of high efficiency, high degree of spheroidization and high yield, an air classifier is added to remove the ultrafine powder peeled off during the shaping process, so that D ₀₀ can be further improved, and finally needle-shaped coke balls with normal particle size distribution can be obtained chemical products.

Referring to Fig. 4 and Fig. 5, the first air lock and discharge valve 8 includes a valve body shell 81 with open openings at both ends. It is connected with a valve shaft 82 driven by the unloading power mechanism. The unloading power mechanism is a motor. The valve shaft 82 is equipped with a plurality of valve plates 83 that are distributed along its ring and sealed with the inner wall of the inner cavity of the valve body. Driving the valve shaft 82 to rotate, the valve plate rotates in the inner cavity of the valve, not only can transport the needle coke, but also can lock the wind flow through the above-mentioned sealing fit.

Referring to Figure 1, when the utility model is used, the material to be crushed is fed into the grinding cylinder 22 by the feeding screw 21, and enters the crushing pair composed of the pressure roller and the grinding ring under the action of centrifugal force for crushing, and the crushed material is ultrafine The grading device is used for grading. The qualified fine powder passes through the ultra-fine grading device and enters the cyclone collector 3 to be collected, and is discharged into the ultra-fine grading mill by the first air lock unloader 8, and the dusty gas is filtered by the pulse dust collector 11. Finally, it is discharged by the induced draft fan. The ultra-fine grading device is driven by a motor, and its control terminal is controlled by a frequency converter. The fineness of the finished powder can be controlled by adjusting the frequency of the motor. The spheroidizing and shaping pair performs spheroidization and shaping, and the materials after spheroidizing and shaping are classified in the classifying device. The qualified powder passes through the classifying device and is further classified by the air classifier 5 to remove the ultrafine powder peeled off during the shaping process. The classifying device is controlled by the motor Drive, its control terminal is controlled by a frequency converter, the fineness of the superfine powder can be controlled by adjusting the frequency of the motor, so that the D ₀₀ can be further improved, and the qualified needle-shaped coke spheroidized products with normal distribution are fed by the second air-lock unloader 10 discharge; the dusty gas is filtered by the pulse bag filter 6 and then discharged by the induced draft fan.

The utility model can also have other embodiments, and other technical solutions formed in the claims are not described in detail one by one. The utility model is not limited by the above-mentioned embodiments. Changes and component replacements are within the protection scope of the present invention.

Claims (7)

1. A kind of 1. needle coke spheroidising complete set of equipments, it is characterized in that including the hopper being sequentially connected by pipeline from after going to （1）, Ultrafine Grinding（2）, cyclone collector（3）, super-fine classified mill（4）, gas flow sizing machine（5）And pulse bag type dust collector（6）, institute State cyclone collector（3）Bottom discharging port be connected with the first lock wind discharge valve（8）, the first lock wind discharge valve（8）Discharging Pipeline is sent by wind in end（9）With super-fine classified mill（4）Connection, cyclone collector（3）Top discharge port be connected with pulse and remove Dirt device（11）, gas flow sizing machine（5）Top sidepiece be connected with discharge nozzle, bottom is connected with drainage conduit（7）, discharge nozzle and pulse Sack cleaner（6）Connect, the second lock wind discharge valve is connected with drainage conduit（10）.
2. 2. needle coke spheroidising complete set of equipments according to claim 1, it is characterized in that：The first lock wind discharge valve （8）Including the open valve shell set of upper and lower ends（81）, valve shell（81）Middle part is provided with rounded body cavity, valve The valve shaft driven by discharging actuating unit is rotatably connected in intracoelomic cavity（82）, valve shaft（82）It is upper be equipped with along its ring cloth and end with Multiple valve plates of the inner wall sealing fitting of body cavity（83）.
3. 3. needle coke spheroidising complete set of equipments according to claim 1, it is characterized in that：The super-fine classified mill（4）Bag Include and be connected to grading mill frame（41）On crushing cylinder（42）, crush cylinder（42）Driven built with by grading mill power set Grading mill axle（43）, grading mill axle（43）It is upper that tup disk is housed（44）, tup disk（44）On be provided with along the multiple of its ring cloth Tup（45）, crush cylinder（42）The tooth form liner plate coordinated with tup is housed on inwall（46）, the crushing cylinder（42）It is upper Side is provided with and blows to its inner chamber and the secondary wind inleting tube being connected with blower fan（47）, the crushing cylinder（42）Rear portion is also equipped with classification dress Put.
4. 4. needle coke spheroidising complete set of equipments according to claim 3, it is characterized in that：The grading plant includes connection Crushing cylinder（42）Conical flow guiding cover on inwall（48）, the big mouth of conical flow guiding cover sets towards tup disk, crushes cylinder （42）On also have rotated the classification line shaft for being connected with and being driven by classification power set（49）, it is classified line shaft（49）Upper power connects It is connected to classification rotating cylinder（40）, the inner extending end that is classified rotating cylinder is stretched into the conical flow guiding cover, side wall is provided with charging aperture, the powder Broken cylinder（42）Outer wall on be connected with the discharge barrel connected with classification rotating cylinder inner chamber.
5. 5. the needle coke spheroidising complete set of equipments according to any one of claim 1-4, it is characterized in that：The Ultrafine Grinding （2）Including being connected to Ultrafine Grinding frame（20）On feed auger（21）, the hopper（1）Discharge end be connected to feed auger On, Ultrafine Grinding frame（20）On be connected with sand cylinder（22）, the inner extending end of feed auger is discharging opening and discharging opening is located at grinding The top of cylinder, the discharge outlet of feed auger are hinged with striker plate（30）, discharging opening can be blocked when striker plate is freely fallen, is ground Cylinder（22）Built with the grinding shaft driven by grinding actuating unit（23）, grinding shaft（23）It is connected with by support arm along its ring cloth Multiple pressure rollers（24）, sand cylinder inwall is provided with the bull ring coordinated with pressure roller（25）, Ultrafine Grinding frame（20）Upper be equipped with is located at Super-fine classified device above sand cylinder.
6. 6. needle coke spheroidising complete set of equipments according to claim 5, it is characterized in that：The super-fine classified device includes The assorting cylinder being connected to above sand cylinder, assorting cylinder is built with cone-shaped hood（26）, the osculum of cone-shaped hood sets towards sand cylinder, institute State on assorting cylinder equipped with the sorting cylinder driven by super-fine classified actuating unit（27）, sorting cylinder（27）Inner extending end stretches into described Cone-shaped hood is interior, side wall is provided with charging aperture, and discharge nozzle is connected with assorting cylinder side wall.
7. 7. the needle coke spheroidising complete set of equipments according to any one of claim 1-4, it is characterized in that：The air-flow point Level machine（5）Top sidepiece be connected with discharge nozzle, bottom is connected with drainage conduit, discharge nozzle and pulse bag type dust collector（6）Connection, The second lock wind discharge valve is connected with drainage conduit（10）.