CN113600322A - Machine adjusting method for preparing lithium battery negative electrode material precursor-spheroidized graphite - Google Patents
Machine adjusting method for preparing lithium battery negative electrode material precursor-spheroidized graphite Download PDFInfo
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- CN113600322A CN113600322A CN202110885404.3A CN202110885404A CN113600322A CN 113600322 A CN113600322 A CN 113600322A CN 202110885404 A CN202110885404 A CN 202110885404A CN 113600322 A CN113600322 A CN 113600322A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a machine adjusting method for preparing a precursor of a lithium battery negative electrode material, namely spheroidized graphite, which comprises the following steps: the method comprises the steps of system configuration and equipment type selection, Roots blower rotating speed adjustment, main machine rotating speed adjustment, inner classifier rotating speed adjustment, outer classifier secondary air inlet opening degree adjustment and the like. The lithium battery cathode material precursor spheroidized graphite produced by the method has the advantages that the tap density can reach 0.9-1.1 g/ml, the median diameter in particle size is 10-25 mu m, and the primary recovery rate of the raw material can reach 50-65%.
Description
Technical Field
The invention relates to a machine adjusting method for preparing a precursor of a lithium battery negative electrode material, namely spheroidized graphite, and belongs to the technical field of lithium ion battery production.
Background
The lithium ion battery has wider and wider application prospect, and particularly, after being applied to the lithium ion power battery and being adopted by electric vehicles and energy storage batteries, the lithium ion power battery has larger and larger market demand and consumption. Statistically, the market demand for lithium ion batteries and their materials is increasing at a rate of 20-30% per year. The market competition is intensified by the increase of the market demand, which leads to more and more enterprises entering the industry. In the industry, enterprises and cooperative universities and scientific research institutions all search for improving efficiency, reducing cost, improving automation degree and reducing labor while producing, but in the face of the problem of low recovery rate of a precursor, namely spheroidized graphite, of a lithium battery cathode material in the production process, technicians in the industry do not find an optimal solution at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a machine adjusting method for preparing a lithium battery negative electrode material precursor spheroidized graphite, and aims to improve the recovery rate of the product, namely the lithium battery negative electrode material precursor spheroidized graphite.
The invention is implemented by the following technical scheme:
a machine adjusting method for preparing a lithium battery negative electrode material precursor-spheroidized graphite comprises the following specific steps: (1) system configuration and equipment type selection: the production system is provided with a crushing system and a grading system, the machines arranged in the crushing system and the grading system adopt a steam vortex crusher, wherein the crushing system consists of N crushing subsystems, each crushing subsystem selects any one of an 80 machine, a 70 machine, a 60 machine, a 50 machine, a 40 machine and a 30 machine, one machine of each crushing subsystem is provided with a plurality of sets and respectively formed by connecting a host machine, an internal classifier, a cyclone separator, a dust remover and a Roots blower, the N crushing subsystems are arranged according to the descending order of the models of the machines and combine the sets of machines together, and each machine is not provided with an external classifier; the grading system is composed of X grading subsystems, each grading subsystem is any one of a 70-type machine, a 60-type machine, a 50-type machine, a 40-type machine, a 30-type machine and a 20-type machine, each grading subsystem is provided with a plurality of sets and is respectively formed by connecting a host machine, an inner grading machine, an outer grading machine, a cyclone separator, a dust remover and a Roots blower, the X grading subsystems are arranged according to the descending order of the model numbers and combine a plurality of sets of grading machines, and each grading subsystem is provided with an outer grading machine with the corresponding model number; the model of the first grading subsystem is less than or equal to that of the Nth crushing subsystem;
(2) adjusting the rotating speed of the Roots blower: the rotating speed of all the Roots blowers in the crushing system is adjusted to be 25-35 HZ; the rotation speed of a Roots blower from a first grading subsystem to an X-1 grading subsystem in the grading system is adjusted to be 25-35HZ, the rotation speed of the Roots blower in the X grading subsystem in the grading system is sequentially increased by 1-3HZ from low to high, and the adjustment range is 35-49 HZ;
(3) adjusting the rotating speed of the main machine: the method comprises the steps of adjusting the rotating speeds of the main machines of all the machines in the crushing system to 35-50 HZ from low to high according to the descending sequence of the model numbers of the machines, keeping the rotating speeds of the main machines of the machines from a first grading subsystem to an X grading subsystem consistent, and adjusting the rotating speeds of the main machines to be 45-50 HZ;
(4) adjusting the rotating speed of the inner classifier: sequentially increasing the rotating speed of the internal classifiers of all the machines in the crushing system by 1-3HZ from low to high according to the descending order of the models of the machines, and adjusting the range to 5-8 HZ; keeping the rotation speeds of the inner classifiers of all the machines in the classification system consistent and adjusting the rotation speeds to be within the range of 6-10 HZ;
(5) adjusting the rotating speed of the outer classifier: keeping the rotating speeds of the external classifiers from the first classification subsystem of the classification system to the X-1 classification subsystem type machine consistent and adjusting the rotating speeds to be 82-100HZ, and sequentially decreasing the rotating speed of the external classifier of the X classification subsystem type machine from high to low by 1-4HZ, wherein the adjusting range is 99-70 HZ;
(6) adjusting the opening degree of secondary air inlet of the outer classifier: adjusting the opening degree of secondary air of an external classifier from a first classification subsystem of the classification system to an X-1 classification subsystem type machine to be 0, arranging the opening degrees of the secondary air of the external classifier of the X classification subsystem type machine from small to large, gradually reducing the opening degree of each type machine by 0-2cm, and controlling the total opening degree of each type machine within 0-5 cm.
(7) Adjusting the blanking speed of a raw material air-lock valve to 10-20 HZ;
(8) properly adjusting the rotating speed of a main machine of the crushing subsystem according to the discharged granularity to enable the granularity to be within a qualified range; properly adjusting the rotating speed of an external classifier of the X-th classifying subsystem type machine according to the tapped density to ensure that the tapped density reaches the qualified range, wherein the adjustment sequence is that the rotating speed of the external classifier of the X-th classifying subsystem type machine is adjusted forwards from the last external classifier of the X-th classifying subsystem type machine, the adjustment range of the rotating speed of the external classifier of the X-th classifying subsystem type machine is 99-70 HZ from high to low, and the rotating speeds of the external classifiers from the first classifying subsystem of the classifying system to the X-1-th classifying subsystem type machine are kept consistent and are adjusted within the range of 82-100 HZ.
Preferably, the model is 80 model machine 2-8 set, the model is 70 model machine 4-12 set, the model is 60 model machine 4-8 set, the model is 50 model machine 8-13 set, the model is 40 model machine 8-12 set, the model is 30 model machine 3-9 set, and the model is 20 model machine 3-8 set;
preferably, the wind pressure of the selected Roots blower is-19.6 to-39.6 KPa, the wind volume is 36 to 60m3/min, and the motor power is 18 to 30 KW.
The invention divides the steam vortex grinder into 80 type, 70 type, 60 type, 50 type, 40 type, 30 type and 20 type according to the diameter of the grinding disc, wherein the diameter of the grinding disc of the 80 type is 80cm, the diameter of the grinding disc of the 70 type is 70cm, the diameter of the grinding disc of the 60 type is 60cm, the diameter of the grinding disc of the 50 type is 50cm, the diameter of the grinding disc of the 40 type is 40cm, the diameter of the grinding disc of the 30 type is 30cm, the diameter of the grinding disc of the 20 type is 20cm, and the larger the diameter of the grinding disc is, the larger the yield in unit time is.
In the crushing subsystem, a set of 80 type machine, a set of 70 type machine, a set of 60 type machine, a set of 50 type machine, a set of 40 type machine and a set of 30 type machine are respectively formed by connecting a host machine, an internal classifier, a cyclone separator, a dust remover and a fan, wherein the connection mode is that a discharge hole of the host machine is connected with a feed hole of the cyclone separator through the internal classifier, an air outlet of the cyclone separator is connected with a feed hole of a pulse bag type dust remover, and an air outlet of the pulse bag type dust remover is connected with the fan. In the grading subsystem, a set of 70 type machine, a set of 60 type machine, a set of 50 type machine, a set of 40 type machine and a set of 30 type machine and 20 type machine are respectively formed by connecting a host machine, an inner grading machine, an outer grading machine, a cyclone separator, a dust remover and a fan; the connection mode is that the discharge port of the main machine is connected with the feed inlet of the outer classifier through the inner classifier, then the air outlet of the outer classifier is connected with the feed inlet of the cyclone separator, the air outlet of the cyclone separator is connected with the feed inlet of the pulse bag type dust collector, and the air outlet of the pulse bag type dust collector is connected with the fan.
The working principle of the machine of the crushing system is that a Roots blower is started to enable an inner cavity of the machine to form negative pressure, materials enter a main machine of the machine under the action of negative pressure airflow, are crushed and then enter an inner classifier to be classified, the separated materials enter a cyclone separator along with airflow to be separated from steam flow, the materials are discharged from a discharge port of the cyclone separator, and the separated airflow enters a dust remover to be filtered and then is discharged by the blower.
The working principle of the grading system type machine is that a Roots blower is started to enable an inner cavity of the grading system type machine to form negative pressure, materials enter an inner grading machine after being crushed in a main machine of the grading system type machine under the action of negative pressure airflow, the graded materials enter an outer grading machine for processing, large-particle materials are discharged from a discharge port of the outer grading machine, the separated small-particle materials enter a cyclone separator along with airflow to be separated from steam flow and are discharged from a discharge port of the cyclone separator, and the separated airflow enters a dust remover to be filtered and then is discharged by the blower.
The invention has the beneficial effects that: the lithium battery negative electrode material precursor spheroidized graphite produced by the method has the advantages that the tap density can reach 0.9-1.1 g/ml, the median diameter of the granularity is 10-25 mu m, the primary recovery rate of the raw materials can reach 50-65%, 10-15 tons of raw materials are fed in 12 hours, 5.0-7.5 tons of finished products are produced in 12 hours, the unit yield is improved by 20-50% compared with the products with the same specification and the same index in the industry, the product yield is improved by 5-30% compared with the products with the same specification and the same index in the industry, the quality is stable, the qualification rate reaches 100%, the ton power consumption is 600-1500 ℃, the cost is low, and the market competitiveness is high.
Drawings
FIG. 1 is a schematic view of a production system.
FIG. 2 is a schematic diagram of a host.
Fig. 3 is an external view of an external classifier.
Figure 4 is an external view of a cyclone separator.
FIG. 5 is an external view of a bag house.
Figure 6 is a schematic diagram of the connection between adjacent 60 units in one embodiment of the pulverizing system 60 unit.
Fig. 7 is a schematic diagram of the connection between the model 8 of the crushing system set and the model 8 of the first subsystem of the classification system set and the model 50 of the first subsystem of the classification system set.
Fig. 8 is a schematic diagram of the connection between the 10 th set of the type 50 machine in the first subsystem and the first set of the type 30 machine in the second subsystem of the grading system.
FIG. 9 shows a production system comprising 8 sets of 60 machines, 10 sets of 50 machines, and 6 sets of 30 machines.
In the figure, 1-a main machine, 2-an internal classifier, 3-an air inlet, 4-an external classifier, 4.1-a feed inlet, 4.2-a discharge outlet, 4.3-an air outlet, 5-a cyclone separator, 5.1-a feed inlet, 5.2-a discharge outlet, 5.3-an air outlet, 6-a dust remover, 6.3-a feed inlet and 6.1-an air outlet; 6.2-discharge port, 7-Roots blower.
Detailed Description
Example one
The production system comprises a crushing subsystem which is preferably a 60-machine 8 set system, a grading system which is preferably a 2-subsystem, a first subsystem which is a 50-machine 10 set system, and a second subsystem which is a 30-machine 6 set system. The system connection is shown in fig. 6, 7, 8 and 9.
The quality indexes of the produced spheroidized graphite product with the SG17-1.0 specification are as follows: d10 is more than or equal to 10.6 mu m, D50 is 17.7-18.6 mu m, D90 is less than or equal to 30 mu m (the particle size analyzer adopts a Dandongton Baite instrument BT-2000 laser particle size analyzer Tap is more than or equal to 1.02g/ml (the Tap density analyzer adopts a Dandongton Baite BT-303 Tap density instrument test method, 50 g of a cartridge-packed sample with 100ml is measured, the vibration is carried out 3000 times, and the amplitude is 3mm.
The raw materials adopt 195-flake graphite with the specification of 50 meshes accounting for 1.62 percent, 80 meshes accounting for 7.96 percent, 100 meshes accounting for 7.68 percent, 200 meshes accounting for 31.42 percent, 325 meshes accounting for 30.94 percent, the tap density of the graphite is 0.755g/ml, and the carbon content is 95.06 percent; the input amount is 11 tons every 12 hours, the equipment adopts a Zhejiang Fengli crushing steam vortex crusher, the air-off machine is adopted for frequency conversion blanking, an outlet of a cyclone separator of 60-1 and an outlet of a dust remover are connected with an air inlet below a main machine of 60-2, and the steam vortex crusher 60-3-60-8 is connected with 60-1 and 60-2; connecting an outlet of a cyclone separator 60-8 of the steam vortex crusher and an outlet of a dust remover with a lower air inlet of a 50-1 main machine, connecting a discharge port of an outer classifier of the steam vortex crusher 50-1 and a discharge port of the cyclone separator with a lower air inlet of a 50-2 main machine, and connecting methods of 50-3-50-10 are the same as 50-1 and 50-2; the discharge port of the outer classifier of the steam vortex crusher 50-10 and the discharge port of the cyclone separator are both connected with the lower air inlet of the main machine of the steam vortex crusher 30-1, and the connection mode of 30-2-30-6 is the same as that of 50-10 and 30-1.
Adjusting the rotation speeds of all the Roots blowers of the 60 type pulverizing subsystem and the 50 type classifying first subsystem to 33HZ, and sequentially adjusting the rotation speeds of the Roots blowers of the 30 type classifying second subsystem steam vortex pulverizing machine to 36HZ, 38HZ, 40HZ, 42HZ, 44HZ and 46HZ from 30-1 to 30-6; the rotational speeds of main machines of 60-1 to 60-8 of the steam vortex crushers of the crushing sub-system are adjusted to 35HZ, 36HZ, 37HZ, 38HZ, 39HZ, 40HZ, 41HZ and 42HZ from low to high in sequence, the rotational speeds of the main machines of 50-1 to 50-10 of the steam vortex crushers of the first grading sub-system are adjusted to 49HZ, and the rotational speeds of the main machines of 30-1 to 30-6 of the steam vortex crushers of the second grading sub-system are adjusted to 50 HZ; the rotating speed of the classifier in the steam vortex pulverizer 60-1-60-8 of the pulverizing subsystem is adjusted to 5HZ, 6HZ, 7HZ, 8HZ and 8HZ from low to high; the rotation of the classifier in the first classification subsystem 50-1-50-10 and the second classification subsystem 30-1-30-6 is adjusted to be 6 HZ; the outer classifiers of the first classification subsystem steam flow vortex crushers 50-1 to 50-10 are adjusted to 82HZ, and the rotating speeds of the outer classifiers of the second classification subsystem steam flow vortex crushers 30-1 to 30-6 are sequentially adjusted to 82HZ, 80HZ, 78HZ, 76HZ, 74HZ and 72HZ from high to low; the secondary air inlet opening degree of the outer grading machine of 50-1-50-10 of the first grading subsystem steam vortex crusher is 0, and the secondary air inlet opening degree of the outer grading machine of 30-1-30-6 of the second grading subsystem steam vortex crusher is 0.25cm, 0.5cm, 1cm and 1cm in sequence; the blanking speed of the raw material air-lock machine is adjusted to 11 HZ.
11 tons of raw material-195 flake graphite enters a 60-1 host machine from a raw material bin through a fan, is crushed in the 60-1 host machine until the granularity is smaller than a certain numerical value, is separated by an inner classifier, is subjected to solid-gas separation in a cyclone separator, and a solid graphite material enters an air inlet below a 60-2 host machine through a discharge hole of the cyclone separator and then enters a crushing cavity of the 60-2 host machine along with wind for crushing; gas separated by the 60-1 cyclone separator enters a 60-1 dust remover to be filtered and is discharged through an air outlet of a Roots blower, materials obtained by filtering in the dust remover enter an air inlet below a 60-2 host machine along with air flow from a discharge hole of the dust remover, then enter a crushing cavity of the 60-2 host machine along with the air flow to be crushed, and the motion path of the crushed materials is the same as that of 60-1; the particle size of the material D90 from the 60-8 cyclone separator is controlled to be 45-55 mu m, and if the particle size is too high or too low, the rotation speed of the main engine is adjusted to be 60-1-60-8. The materials from the 60-cyclone separator and the dust remover enter an air inlet below the 50-1 main machine, enter a crushing cavity of the 50-1 main machine along with air flow, are crushed in the 50-1 crushing cavity to be smaller than a certain granularity, are classified and separated from the 50-1 inner part and enter a 50-1 outer classifier, and are classified again by the 50-1 outer classifier, and large particles in the large particles are discharged from a discharge hole of the 50-1 classifier; the small particles are separated by a 50-1 outer classifier and then enter a 50-1 cyclone separator, solid-gas separation is carried out, the separated solid materials are discharged from a discharge port of the 50-1 cyclone separator, the separated gas enters a 50-1 dust remover for filtration and then is discharged from an air outlet of a Ramot fan, and the materials obtained by filtration in the 50-1 dust remover enter a centralized material collector along with airflow from a discharge port of the dust remover for independent collection; materials discharged by the 50-1 outer classifier and the cyclone separator enter the 50-2 main machine crushing cavity along with airflow through an air inlet below the 50-2 main machine to be crushed, and the operation path of the crushed materials of 50-2 to 50-10 is the same as that of 50-1; large particle materials discharged from a discharge port of a 50-10 outer classifier and small particle materials discharged from a cyclone separator enter a lower air inlet of a 30-1 main machine together with air flow, enter a crushing cavity of the 30-1 main machine along with the air flow, are crushed and ground in the 30-1 crushing cavity, part of material particles are classified and discharged from the 30-1 inner classifier after being smaller than a certain particle size, enter the 30-1 outer classifier, and are classified again by the 30-1 outer classifier, and large particles are discharged from a discharge port of the 30-1 classifier; the small particles are separated by a 30-1 outer classifier and then enter a 30-1 cyclone separator along with the steam flow, solid-gas separation is carried out, the separated solid materials are discharged from a discharge port of the 30-1 cyclone separator, the separated gas enters a 30-1 dust remover for filtering and then is discharged from an air outlet of a Roots blower, and the materials obtained by filtering in the 30-1 dust remover enter a centralized material collector along with the steam flow for independent collection; the materials discharged by the 30-1 outer classifier and the cyclone separator enter the 30-2 main machine crushing cavity along with the airflow through an air inlet below the 30-2 main machine to be crushed and shaped, and the operation path of the 30-2-30-5 crushed materials is 30-1; large particle materials at the discharge port of the 30-5 outer classifier and small particle materials at the discharge port of the 30-5 cyclone separator enter a 30-6 host machine crushing cavity along with the steam flow, the shaped materials are firstly separated out by the 30-6 inner classifier at a rotating speed corresponding to the materials with a certain particle size, then the materials enter the 30-6 outer classifier for classification, the small particle materials with a certain particle size corresponding to the rotating speed of the 30-6 outer classifier are separated out by the 30-6 outer classifier and enter the 30-6 cyclone separator along with the steam flow, solid-gas separation is carried out in the cyclone separator, the small particle materials are discharged from the discharge port of the 30-6 cyclone separator, and 3300kg of fine graphite serving as a spheroidized graphite byproduct is obtained; the airflow is discharged from an air outlet of the cyclone separator of 30-6, enters a dust remover of 30-6 through a pipeline, is filtered and discharged from a discharge port to obtain micro-powder graphite-1650 kg, and the filtered gas is discharged by a Roots blower; discharging large particles in a material with a particle size larger than a certain particle size corresponding to the rotating speed of the 30-6 external classifier along with a discharge port of the external classifier to obtain 6671kg of finished spheroidized graphite, wherein the recovery rate is 60.64 percent, and the particle size indexes are D10 ═ 10.69 μm, D50 ═ 17.93 μm, D90 ═ 29.24 μm and Tap ═ 1.035 g/ml.
Comparative example 1
The same production system as in example one was used: the crushing system is preferably one subsystem, namely 8 sets of 60 machines, the grading system is preferably 2 subsystems, the first subsystem is 10 sets of 50 machines, and the second subsystem is 6 sets of 30 machines. The system connection is shown in fig. 6, 7, 8 and 9; the opposite tuning method to the first embodiment is adopted as follows:
the quality indexes of the produced spheroidized graphite product with the SG17-1.0 specification are as follows: d10 is more than or equal to 10.6 mu m, D50 is 17.7-18.6 mu m, D90 is less than or equal to 30 mu m (the particle size analyzer adopts a Dandongton Baite instrument BT-2000 laser particle size analyzer, and Tap is more than or equal to 1.02g/ml (the Tap density instrument adopts a Dandongton Baite BT-303 Tap density instrument test method, 50 g of a cylindrical sample with the volume of 100ml is contained, the vibration is carried out 3000 times, and the amplitude is 3mm.
The raw materials adopt 195-flake graphite with the specification of 50 meshes accounting for 1.62 percent, 80 meshes accounting for 7.96 percent, 100 meshes accounting for 7.68 percent, 200 meshes accounting for 31.42 percent, 325 meshes accounting for 30.94 percent, the tap density of the graphite is 0.755g/ml, and the carbon content is 95.06 percent; the input amount is 11 tons every 12 hours, the equipment adopts a Zhejiang Fengli crushing steam vortex crusher, and a fan is turned off for frequency conversion blanking.
Adjusting the rotation speeds of all the Roots blowers of the 60 type pulverizing subsystem and the 50 type classifying first subsystem to 48HZ, and sequentially adjusting the rotation speeds of the Roots blowers of the 30 type classifying second subsystem steam vortex pulverizing machine to 46HZ, 44HZ, 42HZ, 40HZ, 38HZ and 36HZ from 30-1 to 30-6; the rotation speeds of main engines of 60-1 to 60-8 of the steam vortex crushers of the crushing subsystem are adjusted to 49HZ, 48HZ, 47HZ, 46HZ, 45HZ, 44HZ, 43HZ and 42HZ from high to low in sequence, the rotation speeds of the main engines of 50-1 to 50-10 of the steam vortex crushers of the first grading subsystem are adjusted to 35HZ, and the rotation speeds of the main engines of 30-1 to 30-6 of the steam vortex crushers of the second grading subsystem are adjusted to 35 HZ; the rotational speed of the classifier in the steam vortex pulverizer 60-1-60-8 of the pulverizing subsystem is adjusted from high to low to 8HZ, 7HZ, 6HZ, 5HZ and 5 HZ; the rotation of the classifier in the first classification subsystem 50-1-50-10 and the second classification subsystem 30-1-30-6 is adjusted to be 15 HZ; the outer classifiers of the first classification subsystem steam flow vortex crushers 50-1 to 50-10 are adjusted to be 75HZ, and the rotating speeds of the outer classifiers of the second classification subsystem steam flow vortex crushers 30-1 to 30-6 are adjusted to be 72HZ, 74HZ, 76HZ, 78HZ, 80HZ and 82HZ from low to high in sequence; the secondary air inlet opening degree of the outer classifier of the first classification subsystem steam vortex crusher 50-1-50-10 is 0.5, and the secondary air inlet opening degree of the outer classifier of the second classification subsystem steam vortex crusher 30-1-30-6 is 1.0cm, 0.5cm, 0.25cm and 0.25 in sequence; the blanking speed of the raw material air-lock machine is adjusted to 11 HZ.
11 tons of raw material-195 flake graphite enters a 60-1 host machine from a raw material bin through a fan, is crushed, ground, shaped and classified through the combined production line, and finally 3300kg of spheroidized graphite byproduct-fine powder graphite is obtained from a discharge port of a 30-6 cyclone separator; 2695kg of fine graphite powder is discharged from a 30-6 dust remover, 5005kg of spheroidized graphite is obtained from a 30-6 external classifier, the recovery rate is 45.5%, and the granularity indexes of D10 ═ 10.79 μm, D50 ═ 17.62 μm, D90 ═ 29.28 μm and Tap ═ 1.038 g/ml.
Example two
The production system comprises 1 preferable subsystem, namely 5 sets of 70 machines, a grading system is preferable to be 2 subsystems, the first subsystem is a 50-machine 10 set, and the second subsystem is a 30-machine 6 set.
The quality indexes of the produced spheroidized graphite product with the SG17-0.98 specification are as follows: d10 is more than or equal to 10.6 mu m, D50 is 16.5-18.0 mu m, and D90 is less than or equal to 29 mu m (the particle size analyzer adopts a Dandongbott instrument BT-2000 laser particle size analyzer, Tap is more than or equal to 0.99g/ml (the Tap density analyzer adopts a Dandongbott BT-303 Tap density analyzer test method, 50 g of a cartridge-packed sample with 100ml is measured, the vibration is carried out 3000 times, and the amplitude is 3mm.
The raw materials adopt 194 flake graphite with the specification of-194, the particle size of 50 meshes accounts for 1.82%, the particle size of 80 meshes accounts for 8.74%, the particle size of 100 meshes accounts for 8.06%, the particle size of 200 meshes accounts for 30.62%, the particle size of 325 meshes accounts for 33.90%, the tap density is 0.747g/ml, and the carbon content is 94.43%; the input amount is 10 tons in 12 hours per shift, the equipment adopts a Zhejiang Yiyi combined crushing steam vortex crusher, the air-off machine is adopted for variable-frequency blanking, the outlet of a cyclone separator 70-1 and the outlet of a dust remover are connected with the air inlet below a main machine 70-2, and the steam vortex crusher 70-3-70-5 is connected with the air inlet 70-1 and the air inlet 70-2; connecting an outlet of a cyclone separator 70-5 of the steam vortex pulverizer and an outlet of a dust remover with a lower air inlet of a 50-1 main machine, connecting a discharge port of an outer classifier 50-1 of the steam vortex pulverizer and a discharge port of the cyclone separator with a lower air inlet of a 50-2 main machine, and connecting methods of 50-3-50-10 are the same as 50-1 and 50-2; the discharge port of the outer classifier of the steam vortex crusher 50-10 and the discharge port of the cyclone separator are both connected with the lower air inlet of the main machine of the steam vortex crusher 30-1, and the connection mode of 30-2-30-6 is the same as that of 50-10 and 30-1.
Adjusting the rotating speeds of all the Roots blowers of the 70 types of the steam vortex pulverizer of the pulverizing subsystem to be 34HZ, adjusting the rotating speeds of the Roots blowers matched with all the 50 types of the first classification subsystem to be 31HZ, and sequentially adjusting the rotating speeds of the Roots blowers of 30-1-30-6 of the steam vortex pulverizer of the second classification subsystem to be 38HZ, 40HZ, 42HZ, 44HZ, 46HZ and 48 HZ; the rotational speeds of main engines of 70-1 to 70-5 of the steam vortex crushers of the crushing subsystems are sequentially adjusted to 40HZ, 42HZ, 44HZ, 46HZ and 48HZ from low to high, the rotational speeds of the main engines of 50-1 to 50-10 of the steam vortex crushers of the first grading subsystem are all adjusted to 50HZ, and the rotational speeds of the main engines of 30-1 to 30-6 of the steam vortex crushers of the second grading subsystem are all adjusted to 49 HZ; the rotating speed of a classifier in a steam vortex pulverizer 70-1-70-5 of the pulverizing subsystem is adjusted to 6HZ, 6.5HZ, 7HZ, 7.5HZ and 8HZ from low to high; the rotational speeds of the classifiers in the first classification subsystem 50-1-50-10 and the second classification subsystem 30-1-30-6 are adjusted to be 7 HZ; the rotating speed of an external classifier of 50-1-50-10 of the first classification subsystem steam vortex crusher is adjusted to 85HZ, and the opening degree of secondary air inlet is 0; the rotating speed of the outer classifier of the second classification subsystem 30-1-30-6 steam vortex pulverizer is sequentially adjusted to 85HZ, 83HZ, 81HZ, 79HZ, 77HZ and 75HZ from high to low; meanwhile, the opening degree of the secondary air inlet is sequentially adjusted to be 0.5cm, 1cm, 1.5cm and 1.5 cm; the blanking speed of the raw material air-lock machine is adjusted to 10.5 HZ.
10 tons of raw material-195 flake graphite enters a 70-1 host machine from a raw material bin through a fan, the D90 particle size is 49.5 mu m after 70-1 to 70-5 crushing, and then the raw material-195 flake graphite enters 50-1 to 50-10 for grinding and grading; finally, shaping and grading in 30-1-30-6; 2790kg of fine graphite powder serving as a spheroidized graphite byproduct is obtained from a discharge port of the 30-6 cyclone separator; 1950kg of fine graphite powder at the discharge port of a 30-6 deduster and 5260kg of spheroidized graphite which is obtained at the discharge port of a 30-6 external classifier have the recovery rate of 52.6 percent and the granularity indexes of D10 ═ 10.60 mu m, D50 ═ 17.52 mu m, D90 ═ 28.71 mu m and Tap ═ 0.998 g/ml.
Comparative example No. two
The production system adopts the same configuration as the embodiment, namely, the production system comprises 1 crushing subsystem, 70 machines and 5 sets, the grading system preferably comprises 2 subsystems, the first grading subsystem comprises 50 machines and 10 sets, the second subsystem comprises 30 machines and 6 sets, and the machine adjusting parameters adopt machine adjusting parameters different from the embodiment two.
The quality indexes of the produced spheroidized graphite product with the SG17-0.98 specification are as follows: d10 is more than or equal to 10.6 mu m, D50 is 16.5-18.0 mu m, D90 is less than or equal to 29 mu m (the particle size analyzer adopts a Dandongton Baite instrument BT-2000 laser particle size analyzer, and Tap is more than or equal to 0.99g/ml (the Tap density instrument adopts a Dandongton Baite BT-303 Tap density instrument test method, 50 g of a cylindrical sample with the volume of 100ml is contained, the vibration is carried out 3000 times, and the amplitude is 3mm.
The raw materials adopt 194 flake graphite with the specification of-194, the particle size of 50 meshes accounts for 1.82%, the particle size of 80 meshes accounts for 8.74%, the particle size of 100 meshes accounts for 8.06%, the particle size of 200 meshes accounts for 30.62%, the particle size of 325 meshes accounts for 33.90%, the tap density is 0.747g/ml, and the carbon content is 94.43%; the input amount is 10 tons in 12 hours per shift, the equipment adopts a Zhejiang Yiyi combined crushing steam vortex crusher, and a fan is turned off for variable frequency blanking.
Adjusting the rotating speeds of all the Roots blowers of the 70 types of the steam vortex pulverizer of the pulverizing subsystem to 45HZ, adjusting the rotating speeds of the Roots blowers matched with all the 50 types of the first classification subsystem to 48HZ, and sequentially adjusting the rotating speeds of the Roots blowers of 30 types of the steam vortex pulverizer of the second classification subsystem to be 49HZ, 48HZ, 47HZ, 46HZ, 45HZ and 44HZ from 30-1 to 30-6; the rotational speed of a main engine of 70-1-70-5 of a steam vortex pulverizer of a pulverizing subsystem is adjusted to 48HZ, 47HZ, 46HZ, 45HZ and 44HZ from high to low in sequence, the rotational speed of the main engine of 50-1-50-10 of the steam vortex pulverizer of a first grading subsystem is adjusted to 36HZ, and the rotational speed of the main engine of 30-1-30-6 of the steam vortex pulverizer of a second grading subsystem is adjusted to 38 HZ; the rotational speed of a classifier in a steam vortex pulverizer 70-1-70-5 of the pulverizing subsystem is adjusted to 8HZ, 7.5HZ, 7HZ, 6.5HZ and 6HZ from high to low; the rotational speeds of the classifiers in the first classification subsystem 50-1-50-10 and the second classification subsystem 30-1-30-6 are adjusted to be 14 HZ; the rotating speed of an external classifier of 50-1-50-10 of the first classification subsystem steam vortex crusher is adjusted to 75HZ, and the opening degree of secondary air is 1.0 cm; the rotating speed of the outer classifier of the second classification subsystem 30-1-30-6 steam vortex pulverizer is sequentially adjusted to 75HZ, 77HZ, 79HZ, 81HZ, 83HZ and 85HZ from low to high; meanwhile, the opening degree of the secondary air inlet is sequentially adjusted to 1.5cm, 1.0cm, 0.5cm and 0.5 cm; the blanking speed of the raw material air-lock machine is adjusted to 10.5 HZ.
10 tons of raw material-195 flake graphite enters the combined production line from a raw material bin through a fan, and is crushed, ground and classified; finally, 3490kg of fine graphite powder which is a spheroidized graphite byproduct is obtained from a discharge port of the 30-6 cyclone separator; 2187kg of micropowder graphite at the discharge port of a 30-6 deduster and 4268kg of spheroidized graphite which is a finished product is obtained at the discharge port of a 30-6 external classifier, the recovery rate is 42.68 percent, and the granularity indexes of D10 ═ 10.49 μm, D50 ═ 17.25 μm, D90 ═ 28.17 μm and Tap ═ 0.996 g/ml.
EXAMPLE III
The production system comprises 2 preferred subsystems, wherein the first subsystem for crushing is an 80-type machine 2 set, and the second subsystem for crushing is an 60-type machine 4 set; the grading system is preferably 2 subsystems, namely a first grading subsystem is a 50-set machine 10, and a second grading subsystem is a 30-set machine 8.
The quality indexes of the produced spheroidized graphite product with the SG16-1.0 specification are as follows: d10 is more than or equal to 10 mu m D50 and is more than or equal to 15.5-16.5 mu m D90 and less than or equal to 29 mu m (the particle size analyzer adopts a Dandongton Baite instrument BT-2000 laser particle size analyzer Tap is more than or equal to 1.02g/ml (the Tap density analyzer adopts a Dandongton Baite BT-303 Tap density instrument test method, 50 g of a cartridge-packed sample with the volume of 100ml is adopted, the vibration is carried out for 3000 times, and the amplitude is 3mm.
The raw material adopts-195 flake graphite with the granularity of 50 meshes accounting for 2.44%, 80 meshes accounting for 10.14%, 100 meshes accounting for 9.02%, 200 meshes accounting for 31.98%, and-325 meshes accounting for 30.78%, the tap density of the graphite is 0.732g/ml, and the carbon content is 95.52%; the input amount is 10 tons every 12 hours, the equipment adopts a Zhejiang Yilian crushing steam vortex crusher, the air-off machine is adopted for frequency conversion blanking, an outlet of a cyclone separator of 80-1 and an outlet of a dust remover are connected with an air inlet below a main machine of 80-2, an outlet of the cyclone separator of the steam vortex crusher 80-2 and an outlet of the dust remover are connected with an air inlet below a main machine of the steam vortex crusher 60-1, and the connection of 60-1 to 60-4 is 80-1 and 80-2; connecting an outlet of a cyclone separator 60-4 of the steam vortex crusher and an outlet of a dust remover with a lower air inlet of a main machine 50-1, connecting a discharge port of an outer classifier 50-1 of the steam vortex crusher and a discharge port of the cyclone separator with a lower air inlet of a main machine 50-2, and connecting methods 50-3-50-10 are the same as 50-1 and 50-2; the discharge port of the outer classifier of the steam vortex crusher 50-10 and the discharge port of the cyclone separator are both connected with the lower air inlet of the main machine of the steam vortex crusher 30-1, and the connection mode of 30-2-30-8 is the same as that of 50-10 and 30-1.
Adjusting the rotating speed of a Roots blower matched with the steam vortex crushers 80-1, 80-2 and 60-1-60-4 of the crushing subsystem to 33 HZ; the rotation speed of a Roots blower matched with 50-1-50-10 is adjusted to 31 HZ; sequentially increasing the rotation speed of a Roots blower of a 30-type airflow vortex crusher of a grading subsystem by 1HZ to be adjusted to 43HZ, 44HZ, 45HZ, 46HZ, 47HZ, 48HZ, 49HZ and 50HZ at the rotation speed of 30-1-30-8; the rotational speeds of the main machines of the air flow vortex crushers 80-1, 80-2 and 60-1-60-4 of the crushing subsystem are sequentially adjusted to be 46HZ, 49HZ, 50HZ and 50HZ from low to high, the rotational speeds of the main machines of the 50 type classification subsystem air flow vortex crushers 50-1-50-10 are all adjusted to be 50HZ, and the rotational speeds of the main machines of the 30 type classification subsystem air flow vortex crushers 30-1-30-8 are all adjusted to be 49 HZ; the rotational speed of the classifier in the steam vortex crushers 80-1, 80-2 and 60-1-60-4 of the crushing subsystem is adjusted to 7HZ, 7.5HZ, 8HZ and 8HZ from low to high; the rotational speed of the grading machine in the 50-type grading subsystem steam vortex crusher 50-1-50-10 and the 30-type grading subsystem steam vortex crusher 30-1-30-8 is adjusted to be 10 HZ; the rotating speed of an external classifier of 50-1-50-10 of the 50-type classification subsystem steam vortex crusher is adjusted to 85HZ, and the opening degree of secondary air inlet is 0; the rotating speed of the 30-type classification subsystem steam vortex crusher 30-1-30-8 external classifier is sequentially adjusted to 90HZ, 87HZ, 84HZ, 81HZ, 78HZ, 75HZ, 72HZ and 70HZ from high to low; meanwhile, the opening degree of the secondary air inlet is sequentially adjusted to be 0cm, 0.5cm, 1.0cm, 1.5cm and 2 cm; the blanking speed of the raw material air-lock machine is adjusted to 12 HZ.
10 tons of raw material-195 flake graphite enters an 80-1 host machine from a raw material bin through a fan, and is crushed, ground, shaped and classified in a production line of the combination, and 2650kg of spheroidized graphite byproduct-fine graphite powder is obtained from a discharge port of a 30-8 cyclone separator; 2200kg of fine graphite powder is discharged from a 30-6 dust remover, 5560kg of spheroidized graphite is obtained from a 30-6 external classifier, the recovery rate is 55.6%, and the granularity indexes of the spheroidized graphite are D10-10.70 mu m, D50-16.41 mu m, D90-27.92 mu m and Tap-1.028 g/ml.
Comparative example No. three
The production system adopts the same subsystem configuration as the embodiment, namely the crushing system preferably adopts 2 subsystems, the first crushing subsystem is 2 sets of 80 machines, and the second crushing subsystem is 4 sets of 60 machines; the grading system is preferably 2 subsystems, namely the first grading subsystem is 10 sets of 50 machines, and the second grading subsystem is 8 sets of 30 machines; the tuning parameter setting method adopts a tuning method different from the third embodiment as follows:
the quality indexes of the produced spheroidized graphite product with the SG16-1.0 specification are as follows: d10 is more than or equal to 10 mu m, D50 is 15.5-16.5 mu m, D90 is less than or equal to 29 mu m (the particle size analyzer adopts a Dandongbott instrument BT-2000 laser particle size analyzer Tap is more than or equal to 1.02g/ml (the Tap density analyzer adopts a Dandongbott BT-303 Tap density analyzer test method, 50 g of sample is contained in a cylinder with the volume of 100ml, the vibration is carried out 3000 times, and the amplitude is 3mm.
The raw material adopts black Longjiang chicken siberian willow hair graphite ore which is produced with specifications of-195 crystalline flake graphite, the granularity of 50 meshes accounts for 0.32 percent, 80 meshes accounts for 3.76 percent, 100 meshes accounts for 7.34 percent, 200 meshes accounts for 33.54 percent, 325 meshes accounts for 30.94 percent, the tap density is 0.646g/ml, and the carbon content is 95.16 percent; the input amount is 10 tons every 12 hours, and the equipment adopts a Zhejiang hundred million combined crushing steam vortex crusher.
Adjusting the rotation speed of a Roots blower matched with a first crushing subsystem steam vortex crusher 80-1-80-2, a second crushing subsystem 60-1-60-4 and a first grading subsystem 50-1-50-10 to 50HZ, and adjusting the rotation speed of a Roots blower 30-1-30-8 of a second grading subsystem steam vortex crusher 30 to 50HZ, 47HZ, 45HZ, 43HZ, 41HZ, 39HZ, 37HZ and 36HZ from large to small in sequence; the rotational speeds of the main engines of the first crushing subsystem, the second crushing subsystem, the first crushing subsystem, the second crushing subsystem and the third crushing subsystem are sequentially adjusted from high to low to be 50HZ, 49HZ, 48HZ, 47HZ, 46HZ and 45HZ, the rotational speeds of the main engines of the first classification subsystem, the second classification subsystem, the first crushing subsystem, the second crushing subsystem and the third crushing subsystem are all adjusted to be 40HZ, and the rotational speeds of the main engines of the second classification subsystem, the first crushing subsystem, the second crushing subsystem and the third crushing subsystem are all adjusted to be 40 HZ; the rotational speed of the grading machine in the first crushing subsystem steam vortex crusher 80-1-80-2 and the second crushing subsystem steam vortex crusher 60-1-60-4 is adjusted to 8HZ, 7HZ, 6HZ, 5HZ and 5HZ from high to low; the rotational speeds of the classifiers in the first classification subsystem 50-1-50-10 and the second classification subsystem 30-1-30-8 are adjusted to be 14 HZ; the rotating speed of an external classifier of 50-1-50-10 of the first classification subsystem is adjusted to 76HZ, and the opening degree of secondary air inlet is 0.5 cm; the rotating speed of the outer classifier of the second classification subsystem 30-1-30-8 steam vortex grinder is sequentially adjusted to 81HZ, 83HZ, 85HZ, 87HZ, 89HZ, 91HZ, 93HZ and 95HZ from low to high; meanwhile, the opening degree of the secondary air inlet is adjusted to be 2cm, 1.5cm, 1.0cm, 0.5cm and 0.25cm from large to small in sequence; the blanking speed of the raw material air-lock machine is adjusted to 12 HZ.
10 tons of raw material-195 flake graphite enters an 80-1 host machine from a raw material bin through a fan, and is crushed, ground, shaped and classified in a production line of the combination, and finally, 3450kg of spheroidized graphite byproduct-fine graphite powder is obtained from a discharge port of a 30-8 cyclone separator; 3190kg of micropowder graphite at the discharge port of a 30-8 deduster, 3298kg of spheroidized graphite as a finished product, which is obtained at the discharge port of a 30-8 external classifier, has the recovery rate of 32.98 percent and has the granularity indexes of D10-10.570 mu m, D50-16.33 mu m, D90-28.62 mu m and Tap-1.025 g/ml.
As can be seen from the above examples and comparative examples, the same raw materials and the same equipment are adopted to produce products with the same specification, the distinctly different parameter adjusting methods are adopted under the condition that the quality indexes of the produced finished products are consistent, the recovery rate obtained by the comparative example is nearly 10% lower than that obtained by the example, and the unit yield obtained by the example is more than 20% higher than that obtained by the comparative example, so that the recovery rate and the unit yield of the machine adjusting method for preparing the spheroidized graphite which is the precursor of the lithium battery negative electrode material disclosed by the invention are higher than those of the traditional machine adjusting method in the industry. The finished product produced by the method has the characteristics of stable quality, low cost and high yield, and has stronger market competitiveness.
Claims (3)
1. A machine adjusting method for preparing a lithium battery negative electrode material precursor-spheroidized graphite is characterized by comprising the following steps of:
(1) system configuration and equipment type selection: the method comprises the following steps that two systems, namely a crushing system and a grading system, are configured, the machines arranged in the crushing system and the grading system adopt steam vortex crushers, wherein the crushing system consists of N crushing subsystems, each crushing subsystem selects any one of an 80 machine, a 70 machine, a 60 machine, a 50 machine, a 40 machine and a 30 machine, each machine is provided with a plurality of sets of crushing subsystems, the crushing subsystems are respectively formed by connecting a host machine, an internal classifier, a cyclone separator, a dust collector and a Roots blower, the N crushing subsystems are arranged according to the descending order of the model numbers of the machines and combine the plurality of sets of crushing subsystems together, and each machine is not provided with an external classifier; the grading system is composed of X grading subsystems, each grading subsystem is any one of a 70-type machine, a 60-type machine, a 50-type machine, a 40-type machine, a 30-type machine and a 20-type machine, each grading subsystem is provided with a plurality of sets and is respectively formed by connecting a host machine, an inner grading machine, an outer grading machine, a cyclone separator, a dust remover and a Roots blower, the X grading subsystems are arranged according to the descending order of the model numbers and combine a plurality of sets of grading machines, and each grading subsystem is provided with an outer grading machine with the corresponding model number; the model of the first grading subsystem is less than or equal to that of the Nth crushing subsystem;
(2) adjusting the rotating speed of the Roots blower: the rotating speed of all the Roots blowers in the crushing system is adjusted to be 25-35 HZ; the rotation speed of a Roots blower from a first grading subsystem to an X-1 grading subsystem in the grading system is adjusted to be 25-35HZ, the rotation speed of the Roots blower in the X grading subsystem in the grading system is sequentially increased by 1-3HZ from low to high, and the adjustment range is 35-49 HZ;
(3) adjusting the rotating speed of the main machine: the method comprises the steps of adjusting the rotating speeds of the main machines of all the machines in the crushing system to 35-50 HZ from low to high according to the descending sequence of the model numbers of the machines, keeping the rotating speeds of the main machines of the machines from a first grading subsystem to an X grading subsystem consistent, and adjusting the rotating speeds of the main machines to be 45-50 HZ;
(4) adjusting the rotating speed of the inner classifier: sequentially increasing the rotating speed of the internal classifiers of all the machines in the crushing system by 1-3HZ from low to high according to the descending order of the models of the machines, and adjusting the range to 5-8 HZ; keeping the rotation speeds of the inner classifiers of all the machines in the classification system consistent and adjusting the rotation speeds to be within the range of 6-10 HZ;
(5) adjusting the rotating speed of the outer classifier: keeping the rotating speeds of the external classifiers from the first classification subsystem of the classification system to the X-1 classification subsystem type machine consistent and adjusting the rotating speeds to be 82-100HZ, and sequentially decreasing the rotating speed of the external classifier of the X classification subsystem type machine from high to low by 1-4HZ, wherein the adjusting range is 99-70 HZ;
(6) adjusting the opening degree of secondary air inlet of the outer classifier: adjusting the opening degree of secondary air of an external classifier from a first classification subsystem of the classification system to an X-1 classification subsystem type machine to be 0, arranging the opening degrees of the secondary air of the external classifier of the X classification subsystem type machine from small to large, gradually reducing the opening degree of each type machine by 0-2cm, and controlling the total opening degree of each type machine within 0-5 cm.
(7) Adjusting the blanking speed of a raw material air-lock valve to 10-20 HZ;
(8) properly adjusting the rotating speed of a main machine of the crushing subsystem according to the discharged granularity to enable the granularity to be within a qualified range; properly adjusting the rotating speed of an external classifier of the X-th classifying subsystem type machine according to the tapped density to ensure that the tapped density reaches the qualified range, wherein the adjustment sequence is that the rotating speed of the external classifier of the X-th classifying subsystem type machine is adjusted forwards from the last external classifier of the X-th classifying subsystem type machine, the adjustment range of the rotating speed of the external classifier of the X-th classifying subsystem type machine is 99-70 HZ from high to low, and the rotating speeds of the external classifiers from the first classifying subsystem of the classifying system to the X-1-th classifying subsystem type machine are kept consistent and are adjusted within the range of 82-100 HZ.
2. The machine-adjusting method for preparing spheroidized graphite serving as a precursor of a lithium battery negative electrode material according to claim 1, wherein the method comprises the following steps: 2-8 sets of 80 type machines, 4-12 sets of 70 type machines, 4-8 sets of 60 type machines, 8-13 sets of 50 type machines, 8-12 sets of 40 type machines, 3-9 sets of 30 type machines and 3-8 sets of 20 type machines.
3. A machine adjusting method for preparing a precursor of a lithium battery negative electrode material, namely spheroidized graphite, is characterized by comprising the following steps: the wind pressure of the selected Roots blower is-19.6 to-39.6 KPa, and the wind pressure isThe amount of the additive is 36-60 m3Min, the motor power is 18-30 KW.
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| CN115403039A (en) * | 2022-08-24 | 2022-11-29 | 大同氢都驰拓新能源有限公司 | Production system and method capable of simultaneously producing spherical graphite with two specifications |
| CN115403039B (en) * | 2022-08-24 | 2023-11-21 | 大同氢都驰拓新能源有限公司 | Production system and method capable of simultaneously producing spherical graphite with two specifications |
| CN115364985A (en) * | 2022-08-31 | 2022-11-22 | 浙江碳一新能源有限责任公司 | Method for preparing spherical graphite and application |
| CN115364985B (en) * | 2022-08-31 | 2023-12-15 | 碳一新能源集团有限责任公司 | Method for preparing spherical graphite and application |
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| CN113600322B (en) | 2023-02-03 |
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Denomination of invention: A Method for Preparing Precursor of Lithium Battery Negative Electrode Material - Spheroidized Graphite Effective date of registration: 20230614 Granted publication date: 20230203 Pledgee: Postal Savings Bank of China Limited Hegang branch Pledgor: LUOBEI AOXING NEW MATERIALS CO.,LTD. Registration number: Y2023230000049 |
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