CN111825089A - Spherical graphite tailing cyclic processing system and method - Google Patents
Spherical graphite tailing cyclic processing system and method Download PDFInfo
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- CN111825089A CN111825089A CN202010655383.1A CN202010655383A CN111825089A CN 111825089 A CN111825089 A CN 111825089A CN 202010655383 A CN202010655383 A CN 202010655383A CN 111825089 A CN111825089 A CN 111825089A
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Abstract
The invention provides a spherical graphite tailing circular processing system and a method, wherein the system comprises: an N-level processing device, a purification device and a drying device; among the N-stage processing devices, the 1 st-stage processing device comprises a mill, a bag type dust collector and a fan which are connected in sequence; the processing devices from the 2 nd stage to the N-2 nd stage comprise a mill, a classifier, a cyclone separator, a bag type dust collector and a fan which are connected in sequence; the N-1 level processing device comprises a cyclone separator, a bag type dust collector and a fan which are connected in sequence; the Nth-stage processing device comprises a bag type dust collector and a fan; the fine powder outlet of the classifier from the 2 nd-level processing device to the N-2 nd-level processing device and the discharge port of the cyclone separator of the N-1 st-level processing device are respectively connected with a purifying device, and the purifying device is connected with a drying device. The preparation method comprises the following steps: multi-stage grinding and grading treatment; purifying; and (5) drying. The invention can realize the recycling of the spherical graphite tailings on one hand, and can obtain the spherical graphite product with high recovery rate of more than 58% and high quality on the other hand.
Description
Technical Field
The invention belongs to the technical field of graphite production and processing, and particularly relates to a spherical graphite tailing circular processing system and method.
Background
The natural graphite with excellent physical properties of high temperature resistance, thermal shock resistance, electric conduction, heat transfer, lubrication, sealing and the like can be used for preparing various graphite functional materials, such as refractory materials, conductive materials, heat conduction materials, high temperature resistant lubricants, conductive inks, sealing materials, antistatic rubbers and plastics, gasoline explosion preventers, high-voltage cable protection layers, anticorrosion materials, anticorrosion coatings, radiation-proof materials and the like, is widely applied to industries such as metallurgy, chemical engineering, machinery, nuclear industry, electronics, aerospace, national defense and the like, the traditional industries such as steel, casting, pencils and the like basically have stable graphite requirements, strategic emerging industries such as clean energy automobiles and the like greatly increase the graphite consumption, mainly the lithium ion battery industry is rapidly developed in the last decade, and the consumption ratio of graphite fine powder is more than 33 percent by 2019 years, the contradiction of resource shortage is increasingly highlighted due to the continuous growth of petroleum crisis and population, and people pay more and more attention to environmental protection, so that the development potential of a green power supply is great, the consumption of graphite fine powder can be continuously increased, but the problems that domestic enterprises produce spherical graphite in a long process flow, low equipment efficiency, overhigh production cost, low utilization rate of graphite resources, non-renewable resources and the like generally exist. In addition, after 40 to 70 times of grinding, thousands of times of collision and cutting friction are carried out on graphite particles, a large amount of submicron and nanoscale fine particles are generated in graphite powder and enter tailings, qualified products with a large proportion are not separated out from the tailings, and the graphite particles are basically wasted. Even if a few enterprises consider further recycling of the graphite tailings, the highest recovery rate is only close to 50%, the lowest recovery rate is only about 32%, and the quality of the recovered graphite powder is not high. If the problems cannot be solved well, the graphite resource is wasted greatly. Therefore, how to improve the recovery rate, reduce the production cost and improve the utilization rate of graphite resources becomes the key point of research and development of enterprises and scientific research units.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a spherical graphite tailing recycling system and a spherical graphite tailing recycling method. The technical scheme of the invention is as follows:
in a first aspect, the present invention provides a spherical graphite tailing recycling system, comprising: an N-level processing device, a purification device and a drying device; among the N-stage processing devices, the 1 st-stage processing device comprises a mill, a bag type dust collector and a fan which are connected in sequence; the processing devices from the 2 nd stage to the N-2 nd stage comprise a mill, a classifier, a cyclone separator, a bag type dust collector and a fan which are connected in sequence; the N-1 level processing device comprises a cyclone separator, a bag type dust collector and a fan which are connected in sequence; the Nth-stage processing device comprises a bag type dust collector and a fan; the connection mode between two adjacent stages of processing devices is as follows: the feed openings of the bag-type dust collectors of the processing devices from the 1 st level to the N-3 rd level are connected with the mill feed opening of the next-level processing device, and the feed opening of the bag-type dust collector of the N-2 nd-level processing device is connected with the cyclone separator feed opening of the N-1 st-level processing device; the air outlets of the bag-type dust collectors of the processing devices from the 1 st stage to the N-3 rd stage are connected with the air inlet of the bag-type dust collector of the next processing device, and the air outlets of the bag-type dust collectors of the processing devices from the N-2 nd stage and the processing devices from the N-1 st stage are respectively connected with the air inlet of the bag-type dust collector of the processing device from the N th stage; and the fine powder outlet of the classifier from the 2 nd-level processing device to the N-2 nd-level processing device and the discharge port of the cyclone separator of the N-1 st-level processing device are respectively connected with a purifying device, and the purifying device is connected with a drying device.
Further, N is not less than 5.
Preferably, said N is 7.
Further, the purification device comprises a primary purification tank and a secondary purification tank which are connected in sequence, wherein the primary purification tank is used for reducing the graphite particle ash subjected to the treatment of the multistage processing device to below 0.5%, and the secondary purification tank is used for reducing the graphite particle ash subjected to primary purification to below 0.02%.
Further, the processing system also comprises an iron removal device, and a feed inlet of the iron removal device is connected with a discharge outlet of the drying device.
In a second aspect, the invention provides a spherical graphite tailing recycling processing method, which comprises the following steps:
(1) loading the spherical graphite tailings into an N-level processing device for multi-level grinding and grading treatment;
(2) putting the ground and graded graphite powder into a purification device for purification;
(3) and (4) putting the purified graphite powder into a drying device for drying treatment.
Further, the rotation speed of a mill of the 1 st-stage processing device in the step (1) is 3000-4000 rpm, the pulse interval of a bag type dust collector is 15s, and the blowing time is 80 mus; the grinding machine rotating speed of the 2 nd to N-2 nd processing devices is 5000-6000 rpm, the rotating speed of the grader is 1600-2000 rpm, the pulse interval of the bag type dust collector is 13s, and the blowing time is 60 mus; the pulse interval of the N-1 level bag type dust collector is 12s, and the blowing time is 50 mus; the pulse interval of the N-stage bag dust collector is 10s, and the blowing time is 40 mus.
Further, the purification treatment in the step (2) includes a primary purification treatment and a secondary purification treatment, the purification apparatus includes a primary purification tank and a secondary purification tank which are connected in sequence, and the primary purification treatment includes: putting the ground and graded graphite powder into a primary purification tank, sequentially adding water and acid liquor, stirring for 3-5 min, controlling the concentration of the solution in the primary purification tank to be 30-50%, then heating the mixed solution to 70-80 ℃, carrying out heat preservation reaction for 5-8 h, stopping the reaction when the ash content of the graphite powder in the reaction solution is reduced to be below 0.5%, and repeatedly washing for more than 3 times; the secondary purification treatment comprises the following steps: and (3) filling the graphite powder subjected to primary purification into a secondary purification tank, adding softened water, heating to above 85 ℃, keeping the temperature and stirring for 4-6 hours, cooling when the ash content of the graphite powder in the mixed solution is reduced to below 0.02%, repeatedly washing for more than 3 times, and dehydrating when the pH value reaches 6-7.
Further, the acid solution is 6mol/L hydrochloric acid, 6mol/L nitric acid and 6mol/L hydrofluoric acid according to a mass ratio of 1: 1: 1, and the sequence of adding the raw materials into a primary purification tank is as follows: hydrochloric acid, nitric acid, hydrofluoric acid.
Further, the drying treatment in the step (3) is carried out at the temperature of 50-60 ℃ for 6-8 h.
Further, the processing method also comprises a process of removing magnetic substances from the dried graphite powder.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides a technology for circularly processing spherical graphite tailings, which can realize the recycling of the spherical graphite tailings on one hand, and can obtain spherical graphite products with high recovery rate of over 58 percent and high quality on the other hand, thereby reducing the enterprise cost and improving the resource utilization rate.
Drawings
Fig. 1 is a schematic structural diagram of a spherical graphite tailing circulation processing system, wherein the spherical graphite tailing circulation processing system comprises a mill 1, a bag type dust collector 2, a fan 3, a classifier 4, a cyclone separator 5, a primary purification tank 6, a secondary purification tank 7, a drying device 8 and an iron removal device 9.
Detailed Description
The mill used in the specific embodiment of the present invention is a ball mill.
The bag type dust collector adopted in the embodiment of the invention is a pulse blowing bag type dust collector.
The fan adopted in the embodiment of the invention is a frequency conversion centrifugal fan.
The classifier adopted in the embodiment of the invention is an eddy current type superfine grinding classifier.
The drying device adopted in the embodiment of the invention is an HZG rotary drum dryer.
The iron removing device adopted in the embodiment of the invention is an electromagnetic iron remover.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms 'mounted', 'connected' and 'connected' are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will now be described in further detail with reference to the following figures and specific examples, which are intended to be illustrative, but not limiting, of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a spherical graphite tailing recycling system, which includes: a 7-stage processing device, a purifying device and a drying device; among the 7-stage processing devices, the 1 st-stage processing device comprises a mill 1, a bag type dust collector 2 and a fan 3 which are connected in sequence; the 2 nd-5 th processing devices comprise a mill 1, a classifier 4, a cyclone separator 5, a bag type dust collector 2 and a fan 3 which are connected in sequence; the 6 th-stage processing device comprises a cyclone separator 5, a bag type dust collector 2 and a fan 3 which are connected in sequence; the 7 th-stage processing device comprises a bag type dust collector 2 and a fan 3; the connection mode between two adjacent stages of processing devices is as follows: the feed opening of a bag type dust collector 5 of the processing devices from the 1 st stage to the 4 th stage is connected with the feed opening of a mill 1 of the next-stage processing device, and the feed opening of a bag type dust collector 2 of the 5 th-stage processing device is connected with the feed opening of a cyclone separator 5 of the 6 th-stage processing device; the air outlets of the bag-type dust collectors 2 of the processing devices from the 1 st stage to the 4 th stage are connected with the air inlets of the bag-type dust collectors 2 of the next-stage processing device, and the air outlets of the bag-type dust collectors 2 of the processing devices from the 5 th stage and the 6 th stage are respectively connected with the air inlets of the bag-type dust collectors 2 of the processing devices from the 7 th stage; the fine powder outlet of the classifier 4 of the 2 nd-5 th processing device and the discharge port of the cyclone separator 5 of the 6 th processing device are connected with the purifying device. The purification device comprises a primary purification tank 6 and a secondary purification tank 7 which are sequentially connected, wherein the primary purification tank 6 is used for reducing the ash content of graphite particles treated by the 7-stage processing device to be below 0.5%, and the secondary purification tank 7 is used for reducing the ash content of graphite particles subjected to primary purification to be below 0.02%. The secondary purification tank 7 is connected with a drying device 8, and the drying device 8 is connected with an iron removal device 9.
Example 2
The embodiment provides a spherical graphite tailing circulation processing method, which adopts the processing system of the embodiment 1 and comprises the following steps:
(1) and (2) putting the spherical graphite tailing into a grinding machine of a grade-1 processing device for grinding treatment, and collecting the ground material through a bag type dust collector, wherein the rotating speed of the grinding machine is 3200rpm, the pulse interval of the bag type dust collector is 15s, and the blowing time is 80 mu s.
(2) The powder collected by the bag type dust collector of the 1 st-level processing device is put into a grinding machine of the 2 nd-level processing device for grinding treatment, the ground material enters a classifier for screening, the fine powder is collected, and the coarse powder sequentially enters a cyclone separator and the bag type dust collector for collection; and (3) sequentially feeding the coarse powder collected in the 2 nd-stage bag type dust collector into a 3 rd-5 th-stage processing device for carrying out the same treatment, wherein the rotating speed of a grinding machine of the 2 nd-5 th-stage processing device is 5400rpm, the rotating speed of a grader is 1800rpm, the pulse interval of the bag type dust collector is 13s, and the blowing time is 60 mu s.
(3) Collecting fine powder collected by a bag type dust collector of a 5 th-level processing device through a cyclone separator and the bag type dust collector of a 6 th-level processing device; in addition, the air outlets of the bag-type dust collectors of the 1 st-4 th processing devices are connected with the air inlet of the bag-type dust collector of the next processing device, the air outlets of the 5 th processing device and the 6 th processing device are respectively connected with the air inlet of the bag-type dust collector of the 7 th processing device, and the bag-type dust collector of the 7 th processing device is used for carrying out centralized treatment on tail gas discharged from the bag-type dust collector of the previous 6 th processing device. By the configuration, the tail gas in the bag type dust collector of each stage of processing device can be further processed in the bag type dust collector of the next stage of processing device, because the dust content in the tail gas is higher and the load of the bag type dust collector is higher as the tail gas reaches the rear part, if the bag type dust collectors of the adjacent stages of processing devices are connected in series, the load of the bag type dust collectors can be reduced to a certain extent on one hand, and on the other hand, part of graphite powder in the tail gas can be effectively recycled. Finally, the particles collected from the 7 th stage bag-type dust collector can be combined with the spherical graphite tailings and then enter the system for recycling treatment.
(4) Filling the graphite powder after grinding and grading treatment (fine powder obtained by a 2 nd-5 th-level processing device grinder and fine powder collected by a 6 th-level processing device bag filter) into a primary purification tank for primary purification treatment; the primary purification treatment comprises the following steps: putting the ground and graded graphite powder into a primary purification tank, sequentially adding water, 6mol/L hydrochloric acid, 6mol/L nitric acid and 6mol/L hydrofluoric acid, and stirring for 5min, wherein the mass ratio of the 6mol/L hydrochloric acid to the 6mol/L nitric acid to the 6mol/L hydrofluoric acid is 1: 1: 1, controlling the concentration of the solution in the primary purification tank to be 45%, then heating the mixed solution to 78 ℃, carrying out heat preservation reaction for 6 hours, stopping the reaction when the ash content of the graphite powder in the reaction solution is reduced to be below 0.5%, and repeatedly washing for 5 times.
(5) Filling the graphite powder subjected to the primary purification treatment into a secondary purification tank for secondary purification treatment; the secondary purification treatment comprises the following steps: and (3) putting the graphite powder subjected to primary purification into a secondary purification tank, adding softened water, heating to above 85 ℃, keeping the temperature and stirring for 5 hours, cooling when the ash content of the graphite powder in the mixed solution is reduced to below 0.02%, repeatedly washing for more than 3 times, and performing primary dehydration treatment when the pH value reaches 7.0.
(6) And (3) putting the primarily dehydrated graphite powder into a drying device for drying treatment, wherein the drying temperature is 55 ℃, and the drying time is 8 h.
(7) And removing the magnetic substances in the dried graphite powder by using an electromagnetic iron remover to obtain the graphite powder.
The amount of the spherical graphite tailing fed in the embodiment is 1kg, the amount of the finally obtained graphite powder is 585g, the recovery rate is 58.5%, the particle size of the obtained graphite powder is 5-8 mu m, and the ash content is 0.01%.
Example 3
The embodiment provides a spherical graphite tailing circulation processing method, which adopts the processing system of the embodiment 1 and comprises the following steps:
(1) and (3) putting the spherical graphite tailings into a grinding machine of a grade-1 processing device for grinding treatment, and collecting the ground materials through a bag type dust collector, wherein the rotating speed of the grinding machine is 3600rpm, the pulse interval of the bag type dust collector is 15s, and the blowing time is 80 mu s.
(2) The powder collected by the bag type dust collector of the 1 st-level processing device is put into a grinding machine of the 2 nd-level processing device for grinding treatment, the ground material enters a classifier for screening, the fine powder is collected, and the coarse powder sequentially enters a cyclone separator and the bag type dust collector for collection; and (3) sequentially feeding the coarse powder collected in the 2 nd-level bag type dust collector into a 3 rd-5 th-level processing device for the same treatment, wherein the grinding machine rotating speed of the 2 nd-5 th-level processing device is 6000rpm, the rotating speed of the classifier is 1600rpm, the pulse interval of the bag type dust collector is 13s, and the blowing time is 60 mus.
(3) Collecting fine powder collected by a bag type dust collector of a 5 th-level processing device through a cyclone separator and the bag type dust collector of a 6 th-level processing device; in addition, the air outlets of the bag-type dust collectors of the 1 st-4 th processing devices are connected with the air inlet of the bag-type dust collector of the next processing device, the air outlets of the 5 th processing device and the 6 th processing device are respectively connected with the air inlet of the bag-type dust collector of the 7 th processing device, and the bag-type dust collector of the 7 th processing device is used for carrying out centralized treatment on tail gas discharged from the bag-type dust collector of the previous 6 th processing device. By the configuration, the tail gas in the bag type dust collector of each stage of processing device can be further processed in the bag type dust collector of the next stage of processing device, because the dust content in the tail gas is higher and the load of the bag type dust collector is higher as the tail gas reaches the rear part, if the bag type dust collectors of the adjacent stages of processing devices are connected in series, the load of the bag type dust collectors can be reduced to a certain extent on one hand, and on the other hand, part of graphite powder in the tail gas can be effectively recycled. Finally, the particles collected from the 7 th stage bag-type dust collector can be combined with the spherical graphite tailings and then enter the system for recycling treatment.
(4) Filling the graphite powder after grinding and grading treatment (fine powder obtained by a 2 nd-5 th-level processing device grinder and fine powder collected by a 6 th-level processing device bag filter) into a primary purification tank for primary purification treatment; the primary purification treatment comprises the following steps: putting the ground and graded graphite powder into a primary purification tank, sequentially adding water, 6mol/L hydrochloric acid, 6mol/L nitric acid and 6mol/L hydrofluoric acid, and stirring for 5min, wherein the mass ratio of the 6mol/L hydrochloric acid to the 6mol/L nitric acid to the 6mol/L hydrofluoric acid is 1: 1: 1, controlling the concentration of the solution in the primary purification tank to be 50%, then heating the mixed solution to 80 ℃, carrying out heat preservation reaction for 5 hours, stopping the reaction when the ash content of the graphite powder in the reaction solution is reduced to be below 0.5%, and repeatedly washing for 5 times.
(5) Filling the graphite powder subjected to the primary purification treatment into a secondary purification tank for secondary purification treatment; the secondary purification treatment comprises the following steps: and (3) putting the graphite powder subjected to primary purification into a secondary purification tank, adding softened water, heating to above 90 ℃, keeping the temperature and stirring for 4 hours, cooling when the ash content of the graphite powder in the mixed solution is reduced to below 0.02%, repeatedly washing for more than 3 times, and performing primary dehydration treatment when the pH value reaches 7.0.
(6) And (3) putting the primarily dehydrated graphite powder into a drying device for drying treatment, wherein the drying temperature is 58 ℃, and the drying time is 6 h.
(7) And removing the magnetic substances in the dried graphite powder by using an electromagnetic iron remover to obtain the graphite powder.
The amount of spherical graphite tailings fed in the present example was 5kg, the amount of finally obtained graphite powder was 2.95kg, the recovery rate was 59%, the particle size of the obtained graphite powder was 4 to 6 μm, and the ash content was 0.01%.
In summary, the present invention provides a technology for recycling spherical graphite tailings, which can achieve recycling of spherical graphite tailings, and can obtain spherical graphite products with high quality and a recovery rate of more than 58%, thereby reducing enterprise cost and improving resource utilization rate.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a spherical graphite tails cycle processing system which characterized in that: the method comprises the following steps: an N-level processing device, a purification device and a drying device; among the N-stage processing devices, the 1 st-stage processing device comprises a mill, a bag type dust collector and a fan which are connected in sequence; the processing devices from the 2 nd stage to the N-2 nd stage comprise a mill, a classifier, a cyclone separator, a bag type dust collector and a fan which are connected in sequence; the N-1 level processing device comprises a cyclone separator, a bag type dust collector and a fan which are connected in sequence; the Nth-stage processing device comprises a bag type dust collector and a fan; the connection mode between two adjacent stages of processing devices is as follows: the feed openings of the bag-type dust collectors of the processing devices from the 1 st level to the N-3 rd level are connected with the mill feed opening of the next-level processing device, and the feed opening of the bag-type dust collector of the N-2 nd-level processing device is connected with the cyclone separator feed opening of the N-1 st-level processing device; the air outlets of the bag-type dust collectors of the processing devices from the 1 st stage to the N-3 rd stage are connected with the air inlet of the bag-type dust collector of the next processing device, and the air outlets of the bag-type dust collectors of the processing devices from the N-2 nd stage and the processing devices from the N-1 st stage are respectively connected with the air inlet of the bag-type dust collector of the processing device from the N th stage; and the fine powder outlet of the classifier from the 2 nd-level processing device to the N-2 nd-level processing device and the discharge hole of the cyclone separator of the N-1 st-level processing device are connected with a purifying device, and the purifying device is connected with a drying device.
2. The spherical graphite tailing circulation processing system of claim 1, characterized in that: the N is not less than 5.
3. The spherical graphite tailing circulation processing system of claim 2, characterized in that: and N is 7.
4. The spherical graphite tailing circulation processing system of claim 1, characterized in that: the purification device includes continuous first purification jar and secondary purification jar in order, first purification jar is used for reducing the graphite particle ash after multistage processing apparatus handles to below 0.5%, the secondary purification jar is used for reducing the graphite particle ash after once purifying to below 0.02%.
5. The spherical graphite tailing circulation processing system according to any one of claims 1 to 4, characterized in that: the processing system further comprises an iron removal device, and a feed inlet of the iron removal device is connected with a discharge outlet of the drying device.
6. A spherical graphite tailing circular processing method is characterized in that: the method comprises the following steps:
(1) loading the spherical graphite tailings into an N-level processing device for multi-level grinding and grading treatment;
(2) putting the ground and graded graphite powder into a purification device for purification;
(3) and (4) putting the purified graphite powder into a drying device for drying treatment.
7. The spherical graphite tailing circulation processing method according to claim 6, characterized in that: the rotation speed of a grinding machine of the 1 st-stage processing device in the step (1) is 3000-4000 rpm, the pulse interval of a bag type dust collector is 15s, and the blowing time is 80 mu s; the grinding machine rotating speed of the 2 nd to N-2 nd processing devices is 5000-6000 rpm, the rotating speed of the grader is 1600-2000 rpm, the pulse interval of the bag type dust collector is 13s, and the blowing time is 60 mus; the pulse interval of the N-1 level bag type dust collector is 12s, and the blowing time is 50 mus; the pulse interval of the N-stage bag dust collector is 10s, and the blowing time is 40 mus.
8. The spherical graphite tailing circulation processing method according to claim 6, characterized in that: the purification treatment in the step (2) comprises primary purification treatment and secondary purification treatment, the purification device comprises a primary purification tank and a secondary purification tank which are sequentially connected, and the primary purification treatment comprises: putting the ground and graded graphite powder into a primary purification tank, sequentially adding water and acid liquor, stirring for 3-5 min, controlling the concentration of the solution in the primary purification tank to be 30-50%, then heating the mixed solution to 70-80 ℃, carrying out heat preservation reaction for 5-8 h, stopping the reaction when the ash content of the graphite powder in the reaction solution is reduced to be below 0.5%, and repeatedly washing for more than 3 times; the secondary purification treatment comprises the following steps: and (3) filling the graphite powder subjected to primary purification into a secondary purification tank, adding softened water, heating to above 85 ℃, keeping the temperature and stirring for 4-6 hours, cooling when the ash content of the graphite powder in the mixed solution is reduced to below 0.02%, repeatedly washing for more than 3 times, and dehydrating when the pH value reaches 6-7.
9. The spherical graphite tailing circulation processing method according to claim 8, characterized in that: the acid solution is 6mol/L hydrochloric acid, 6mol/L nitric acid and 6mol/L hydrofluoric acid according to a mass ratio of 1: 1: 1, and the sequence of adding the raw materials into a primary purification tank is as follows: hydrochloric acid, nitric acid, hydrofluoric acid.
10. The method for circularly processing the spherical graphite tailings according to any one of claims 6 to 9, wherein the method comprises the following steps: the processing method also comprises a process of removing magnetic substances from the dried graphite powder.
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| CN101905883A (en) * | 2010-08-11 | 2010-12-08 | 黑龙江省牡丹江农垦奥宇石墨深加工有限公司 | Production method of spherical graphite |
| CN201753265U (en) * | 2010-08-11 | 2011-03-02 | 黑龙江省牡丹江农垦奥宇石墨深加工有限公司 | Spherical graphite producing device |
| CN201981009U (en) * | 2011-04-02 | 2011-09-21 | 黑龙江省牡丹江农垦奥宇石墨深加工有限公司 | Improved device for producing spherical graphite |
| CN203006954U (en) * | 2012-07-31 | 2013-06-19 | 鸡西市同泰石墨制品有限公司 | Device of producing high-yield spherical graphite |
| CN105883785A (en) * | 2016-04-08 | 2016-08-24 | 王亚莉 | Ultramicro spherical graphite production equipment and method applicable to lithium ion battery |
| CN109485040A (en) * | 2018-11-28 | 2019-03-19 | 乌兰察布市大盛石墨新材料股份有限公司 | The method for preparing graphite microspheres using graphite tailing |
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