Integrated treatment system for carbon micro-powder particles

Abstract

The invention discloses an integrated treatment system for carbon micro powder particles. The integrated treatment system comprises a mesh belt type continuous drying machine, a baking machine and a pre-carbonization furnace, carrying out gradient drying treatment on the continuously input carbon micro-powder particles by the mesh belt type continuous dryer to obtain dry particles K1; the dry particles K1 continuously output by the mesh belt type continuous dryer are directly conveyed into a baking machine, and the baking machine performs gradient baking treatment on the continuously input dry particles K1 to obtain carbon micro powder particles K2; directly conveying the continuously output carbon micro-powder particles K2 into a pre-carbonization furnace, and performing pre-carbonization treatment on the continuously input carbon micro-powder particles K2 by the pre-carbonization furnace to obtain carbon micro-powder pre-carbonized particles K3. According to the invention, integrated continuous treatment of three-section processes of drying treatment, baking treatment and pre-carbonization treatment of carbon micro-powder particles is realized, and mechanical oxygen isolation is adopted for discharging of the pre-carbonization furnace, so that waste of heat and materials is effectively reduced, and labor cost and time cost generated by material transfer are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery negative electrode materials, and particularly relates to a system for processing carbon micro-powder particles in the manufacturing of secondary batteries. BACKGROUND

[0002] Lithium ion batteries are a kind of secondary batteries. At present, researchers are actively developing lithium ion batteries with better large-current charge-discharge performance and higher safety for use in electric vehicles. Lithium ion batteries have excellent performance in terms of small size, light weight, no pollution, fast charge and discharge, long cycle life, etc. However, the commonly used negative electrode materials include artificial graphite, natural graphite and mesocarbon microbeads, which are essentially graphite-based negative electrode materials. At present, the actual delithiation capacity of graphite-based negative electrode materials in half-batteries has approached the theoretical limit, but still cannot meet the demand of high-energy-density batteries. The common process for graphite-based negative electrode materials is to grind artificial graphite or natural graphite into powder with a particle size meeting the requirements, and then to perform shaping treatment on the powder. In the production process of carbon micro-powder particles, the carbon micro-powder particles are the front-end intermediates of the vertical continuous graphitization process. Before entering the vertical continuous graphitization process, the carbon micro-powder particles are first dried and the water content is effectively removed to avoid adverse effects in the subsequent process, such as the initiation of side reactions and particle breakage.

[0003] At present, in the existing graphite material process technology, the drying, baking and pre-carbonization processes of carbon micro-powder particles are carried out separately. The dried and baked carbon micro-powder particles must be taken out, cooled, and then sent to the pre-carbonization equipment for pre-carbonization. This process is complicated, time-consuming, and wastes manpower and energy. In addition, the carbon micro-powder particles are broken during the intermittent process of transferring, which cannot meet the demand of the vertical continuous graphitization process. In addition, the carbon micro-powder particles are provided with hot-melt thermosetting components. After drying, the hot-melt thermosetting components in the carbon micro-powder particles can only be effectively consolidated through baking.

[0004] In addition, the bottom of the existing pre-carbonization furnace needs to be connected with inert gas to achieve oxygen isolation, which increases the cost of equipment investment and raw materials for production operation.

[0005] Therefore, there is an urgent need for a system that can continuously dry, bake and pre-carbonize to overcome the above shortcomings and meet the demand of the vertical continuous graphitization process in the rear end. SUMMARY

[0006] The present application aims to provide a carbon micro-powder particle integrated processing system that integrates the drying process, the baking process and the pre-carbonization process into a continuous process.

[0007] To achieve the above object, the present application provides a carbon powder particle integrated processing system for drying treatment, baking treatment and pre-carbonization treatment of carbon powder particles, which comprises:

[0008] A mesh belt type continuous dryer for drying treatment of carbon powder particles and obtaining dry particles K1, the mesh belt type continuous dryer comprises a box body and a mesh belt, a mesh belt driving mechanism and a fan unit arranged in the box body, the top of the box body is provided with a drying material inlet opposite the material inlet end of the uppermost layer of mesh belt; the material outlet end of the lowermost layer of mesh belt outputs dry particles K1 to the drying material outlet; the bottom of the box body is provided with a heat exchanger;

[0009] A baking machine for baking treatment of dry particles K1 and obtaining carbon powder particles K2, dry particles K1 are transported in the baking machine from the baking material inlet to the baking material outlet by spiral rolling rotation of the baking machine to form carbon powder particles K2;

[0010] A pre-carbonization furnace for pre-carbonization treatment of carbon powder particles K2 and obtaining carbon powder pre-carbonization particles K3, carbon powder particles K2 are transported from the pre-carbonization material inlet to the pre-carbonization material outlet of the pre-carbonization furnace to form carbon powder pre-carbonization particles K3.

[0011] Preferably, in the carbon powder particle integrated processing system of the present application, the temperature of the uppermost layer of mesh belt to the lowermost layer of mesh belt in the mesh belt type continuous dryer increases by equal gradient at 30-105℃; the mesh belts are arranged in layers from top to bottom, the temperature gradient between adjacent mesh belts is 12-15℃, and the height difference between adjacent mesh belts is 200-300mm. If the height difference is too small, that is, the interlayer gap is too small, the flow of hot air and water vapor overflow is not smooth, which will affect the drying efficiency, and if the height difference is too large, it is easy to cause damage to the particles when falling.

[0012] Preferably, in the carbon powder particle integrated processing system of the present application, the top of the mesh belt type continuous dryer is provided with a drying tail gas pipe for discharging tail gas, and the drying tail gas pipe is in communication with the first water pool outside.

[0013] Preferably, in the drying treatment of the carbon powder particle integrated processing system of the present application, the moving speed of the mesh belt is 0-20m / h; the width of the mesh belt is 1-2m; and the total distance traveled by the carbon powder particles driven by the entire mesh belt is 60-120m.

[0014] Preferably, in the carbon micro-powder granule integrated processing system of the present application, the roaster is of an external heating type roller structure, and has a rotatable roller; the roaster is provided with a spiral guide groove between the roasting inlet and the roasting outlet; the dry granule K1 enters the guide groove from the roasting inlet, and the dry granule K1 in the guide groove spirally rolls and travels with the rotation of the roller to the roasting outlet to form the carbon micro-powder granule K2.

[0015] Preferably, in the carbon micro-powder granule integrated processing system of the present application, the rotation speed of the roller is 0.5-3.0 revolutions per minute; the inner diameter of the roller is 1.5-2.0 meters, and the length of the roller is 12-20 meters; the pitch of the guide groove is 100-200 millimeters, and the height of the guide groove is 200-300 millimeters.

[0016] Preferably, in the carbon micro-powder granule integrated processing system of the present application, the temperature of the dry granule K1 from the roasting inlet to the roasting outlet is gradually increased from 90℃ to 300℃; the roasting inlet is connected with a pipeline in communication with an external second pool, and the roasting flue gas in the roaster is opposite to the traveling direction of the dry granule K1 and is sucked into the external second pool by the pipeline.

[0017] Preferably, in the carbon micro-powder granule integrated processing system of the present application, the pre-carbonization furnace is of a vertical structure, the pre-carbonization inlet is located at the top, and the pre-carbonization outlet is located at the bottom; the pre-carbonization outlet is provided with a rotatable multi-hopper closed-air discharger capable of airtightly closing the pre-carbonization outlet; the diameter of the receiving port of the rotatable multi-hopper closed-air discharger is larger than that of the pre-carbonization outlet; the rotatable multi-hopper closed-air discharger rotates clockwise, and a negative pressure extraction device is arranged at the left middle part of the rotatable multi-hopper closed-air discharger to discharge the air in the empty rotating hopper; the pre-carbonization outlet is isolated from the inside of the pre-carbonization furnace and the outside; and the rotatable multi-hopper closed-air discharger airtightly takes out the pre-carbonized material to obtain the carbon micro-powder pre-carbonized granule K3.

[0018] Preferably, in the carbon micro-powder and particle integrated processing system of the present application, the pre-carbonization furnace comprises, from top to bottom, a pre-heating exhaust section, a pre-carbonization section, a temperature-maintaining section, a cooling section and a discharge section; the pre-carbonization feeding port is directly communicated with the pre-heating exhaust section, and the pre-carbonization discharge port is directly communicated with the discharge section; the temperature of the pre-heating exhaust section increases from 200°C to 500°C from top to bottom; the temperature of the pre-carbonization section increases from 500°C to 1600°C from top to bottom; the temperature of the temperature-maintaining section decreases from 1600°C to 600°C from top to bottom; the temperature of the cooling section decreases from 600°C to 100°C from top to bottom; the temperature of the discharge section decreases from 100°C to 40°C from top to bottom; and the high-temperature gas overflowing from the pre-carbonization feeding port of the pre-carbonization furnace is unidirectionally introduced to the mesh-belt continuous dryer for heat exchange.

[0019] Preferably, in the carbon micro-powder and particle integrated processing system of the present application, the pressure of the outlet of the pre-carbonization feeding port overflowing with high-temperature gas is controlled by the air-inducing fan, and the pressure of the outlet is (P0-0)~(P0+30) Pa; wherein P0 is the standard atmospheric pressure value; if the pressure of the outlet is too small, i.e. the negative pressure is too large, air is easy to enter the pre-carbonization furnace from the feeding port, causing the carbon micro-powder and particles to be burned; and the pressure of the outlet should not be too large, otherwise, the gas overflowing from the pre-carbonization furnace is too slow, resulting in a decrease in the pre-carbonization efficiency.

[0020] Compared with the prior art, the carbon micro-powder particles are transported into the mesh belt type continuous dryer for drying treatment to obtain dry particles K1, the dry particles K1 are directly transported into the roaster for roasting treatment to obtain carbon micro-powder particles K2, and the carbon micro-powder particles K2 are directly transported into the pre-carbonization furnace for pre-carbonization treatment to obtain carbon micro-powder pre-carbonization particles K3. As can be seen, the carbon micro-powder particles are subjected to continuous drying treatment, roasting treatment and pre-carbonization treatment, the drying treatment, the roasting treatment and the pre-carbonization treatment of the carbon micro-powder particles are integrated and continuously processed, the waste of heat is effectively reduced, the labor cost and the time cost caused by material transfer are reduced, and meanwhile, the carbon micro-powder particles are prevented from being broken during the transfer process in the existing intermittent process and cannot meet the feeding requirements of the subsequent vertical continuous graphitization process. Meanwhile, the carbon micro-powder particles are provided with hot-melt thermosetting components during implementation, the hot-melt thermosetting components in the carbon micro-powder particles can fully play a good consolidation effect after the drying treatment and the roasting treatment, and the carbon micro-powder pre-carbonization particles K3 obtained by using the carbon micro-powder particle integrated processing system have a more complete appearance and more uniform particles. Specifically, the mesh belt type continuous dryer is used for the drying treatment from top to bottom in a mesh belt layering manner, and the heat source is derived from the bottom, so that the temperature of the mesh belt from top to bottom is gradiently increased to dry the carbon micro-powder particles, on the one hand, the carbon micro-powder particles can be continuously dried by the carbon micro-powder particle integrated processing system, and the subsequent roasting treatment and pre-carbonization treatment can also be continuously performed, so that the production efficiency is greatly improved; on the other hand, the drying treatment in the mesh belt layering manner and the gradiently increased temperature make the carbon micro-powder particles first undergo a stable temperature drying process for a period of time during the transmission process, so that the carbon micro-powder particles can be fully and uniformly heated, and then the temperature is gradiently increased to jump to another stable temperature for a period of time, so that the drying process and effect of the carbon micro-powder particles are accelerated and optimized, the adverse effects of water in the subsequent process, such as the occurrence of side reactions and particle breakage, are avoided, and the subsequent roasting treatment can be orderly performed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the carbon micro-powder particle integrated processing system.

[0022] Figure 2 is a structural schematic view of the mesh belt type continuous dryer.

[0023] Figure 3 is a structural schematic view of the roaster.

[0024] Figure 4 is a layout structural schematic view of the guide chute arranged in the roller.

[0025] Figure 5is a structural schematic diagram of a pre-carbonization furnace of the present application.

[0026] Figure 6 is an apparent diagram of a carbon micro-powder pre-carbonization particle K3 product obtained by the carbon micro-powder particle integrated processing system of the present application.

[0027] Figure 7 is an apparent diagram of a carbon micro-powder pre-carbonization particle K3' product obtained by Comparative Example 1.

[0028] Figure 8 is an apparent diagram of a carbon micro-powder pre-carbonization particle K3'' product obtained by Comparative Example 2. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with specific implementation examples and the accompanying drawings, and the technical solutions of the present application will be described and explained. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application. The specific embodiments of the present application will be described in detail below in combination with the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below. The embodiments of the present application will now be described with reference to the accompanying drawings, wherein similar elements are denoted by similar reference numerals.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] As Figure 1As shown, the carbon micro-powder particle integrated processing system comprises a mesh belt continuous dryer 1, a baking machine 2 and a pre-carbonization furnace 3. The mesh belt continuous dryer 1 performs drying treatment on the continuously input carbon micro-powder particles and obtains dry particles K1; the dry particles K1 continuously output by the mesh belt continuous dryer 1 are directly conveyed into the baking machine 2, the baking machine 2 performs baking treatment on the continuously input dry particles K1 and obtains carbon micro-powder particles K2; the carbon micro-powder particles K2 continuously output by the baking machine 2 are directly conveyed into the pre-carbonization furnace 3, the pre-carbonization furnace 3 performs pre-carbonization treatment on the continuously input carbon micro-powder particles K2 and obtains carbon micro-powder pre-carbonization particles K3. Thus, the drying treatment, the baking treatment and the pre-carbonization treatment of the carbon micro-powder particles are integrated and continuously processed, the waste of heat is effectively reduced, the labor cost and the time cost caused by material transfer are reduced, and the carbon micro-powder particles are prevented from being broken during the transfer process in the existing intermittent process and cannot meet the feeding requirements of the subsequent vertical continuous graphitization process. Figure 1 The carbon micro-powder particle integrated processing system is further described in detail as follows:

[0032] As shown in FIG. 1, the carbon micro-powder particle integrated processing system comprises a mesh belt continuous dryer 1, a baking machine 2 and a pre-carbonization furnace 3. Figures 1-5As shown, the present application provides continuous feeding of carbon powder particles to the net-belt continuous dryer 1 when implemented. The feeding machine of the present application comprises a conveying belt 1a and a distributor 1b, the conveying belt 1a is connected to the distributor 1b for continuously providing carbon powder particles to the distributor 1b. The outlet of the distributor 1b of the present application is in communication with the drying inlet 10 of the net-belt continuous dryer 1, the distributor 1b continuously receives the carbon powder particles conveyed by the conveying belt 1a and uniformly distributes them to the drying inlet 10 of the net-belt continuous dryer 1, so that the carbon powder particles are conveyed into the net-belt continuous dryer 1 for drying treatment to obtain dry particles K1. Specifically, the drying outlet 11 of the net-belt continuous dryer 1 is directly in communication with the baking inlet 20 of the baking machine 2 through the first conveying device 4, the first conveying device 4 has a first sealing channel for sealing conveying dry particles K1, the sealing channel is arranged between the drying outlet 11 and the baking inlet 20 in communication, which ensures that the dry particles K1 can be directly conveyed from the net-belt continuous dryer 1 to the baking machine 2, and also ensures that the dry particles K1 are not exposed to the outside during the process of being directly conveyed from the net-belt continuous dryer 1 to the baking machine 2; the first conveying device 4 of the present application can adopt an existing belt conveying device sealed in a housing. The dry particles K1 obtained by the drying treatment of the net-belt continuous dryer 1 of the present application are directly conveyed to the baking inlet 20 of the baking machine 2 through the first conveying device 4, and then the dry particles K1 directly enter the baking machine 2 for baking treatment, and the dry particles K1 are conveyed out of the baking outlet 21 after baking treatment in the baking machine 2. The baking outlet 21 of the baking machine 2 is in communication with the pre-carbonization inlet 30 of the pre-carbonization furnace 3 through the bucket elevator 5; the bucket elevator 5 of the present application has a second sealing channel for sealing conveying carbon powder particles K2, the second sealing channel is arranged between the baking outlet 21 and the pre-carbonization inlet 30 in communication, which ensures that the carbon powder particles K2 can be directly conveyed from the baking machine 2 to the pre-carbonization furnace 3, and also ensures that the carbon powder particles K2 are not exposed to the outside during the process of being directly conveyed from the baking machine 2 to the pre-carbonization furnace 3; the bucket elevator 5 can adopt an existing bucket elevator for conveying particles with a sealed pipeline. The carbon powder particles K2 conveyed out of the baking outlet 21 of the baking machine 2 of the present application are conveyed to the pre-carbonization inlet 30 of the pre-carbonization furnace 3 under the conveying action of the bucket elevator 5, and then the carbon powder particles K2 enter the pre-carbonization furnace 3 for pre-carbonization treatment, and the carbon powder particles K2 are conveyed out of the pre-carbonization outlet 31 after pre-carbonization treatment in the pre-carbonization furnace 3. The present application conveys carbon powder particles into the net-belt continuous dryer for drying treatment to obtain dry particles K1, directly conveys the dry particles K1 to the baking machine for baking treatment to obtain carbon powder particles K2, and directly conveys the carbon powder particles K2 to the pre-carbonization furnace for pre-carbonization treatment to obtain carbon powder pre-carbonization particles K3.It can be seen that the carbon powder particles are transported into the net belt type continuous dryer 1 for drying treatment to obtain dry particles K1, and the dry particles K1 are directly transported to the roasting machine 2 for roasting treatment to obtain carbon powder particles K2, and the carbon powder particles K2 are directly transported to the pre-carbonization furnace 3 for pre-carbonization treatment to obtain carbon powder pre-carbonization particles K3; the drying treatment, the roasting treatment and the pre-carbonization treatment of the carbon powder particles are integrated and continuously processed, the waste of heat is effectively reduced, the labor cost and the time cost caused by material transfer are reduced, and meanwhile, the carbon powder particles are prevented from being broken during the transfer process of the existing intermittent process, and the feeding requirement of the subsequent vertical continuous graphitization process can be met.

[0033] Continuing with Figure 1As shown, the net-belt continuous baking machine 1 of the present application comprises a net-belt 12, a net-belt driving mechanism 12, a box 14 and a fan unit 15; the net-belt 12, the net-belt driving mechanism 12 and the fan unit 15 are arranged in the box 14. The net-belt 12 of the present application is used to carry carbon micro-powder particles for conveying in the net-belt continuous baking machine 1. The net-belt driving mechanism 13 is arranged corresponding to the net-belt 12 and is used to drive the net-belt 12 to rotate; the net-belt 12 is arranged in a ring shape on the net-belt driving mechanism 13. The moving speed and the rotating direction of the net-belt 12 of the present application are controlled by the corresponding net-belt driving mechanism 13; the moving speed of all the net-belts 12 at the same time is the same, so that the carbon micro-powder particles on the net-belt 12 can be continuously conveyed, and the net-belt continuous baking machine 1 can continuously output dry particles K1 to the baking machine 2. The net-belt 12 of the present application is arranged in multiple layers and in parallel from top to bottom; the regions where the two ends of each layer of the net-belt 12 are located correspond to form a feeding end and a discharging end respectively; specifically, since the net-belt 12 of the present application is in a ring shape, the net-belt 12 will rotate in a cycle under the driving of the corresponding net-belt driving mechanism 13; therefore, one of the two ends of the space region where the ring shape is located forms the feeding end, and the other end forms the discharging end. The top of the box is provided with a drying feeding port opposite the feeding end of the uppermost layer of the net-belt; the carbon micro-powder particles on the upper layer of the net-belt are conveyed to the discharging end under the rotation of the net-belt and fall into the feeding end of the next layer of the net-belt by their own gravity. The drying discharge port 11 of the net-belt continuous baking machine 1 of the present application is arranged at the bottom 14a of the box 14 opposite the discharging end of the lowermost layer of the net-belt 12, so that the discharging end of the lowermost layer of the net-belt outputs the dry particles K1 directly into the drying discharge port 11. The fan unit 15 of the present application is arranged at the bottom 14a of the box 14 and circulates and drains hot air from bottom to top; the bottom 14a of the box 14 is provided with a heat exchanger for exchanging heat with the outside to obtain a heat source. Since the bottom 14a of the box 14 exchanges heat with the outside through the heat exchanger to obtain a heat source, and the fan unit 15 is also arranged at the bottom 14a, the temperature of the hot air of the box 14 decreases from bottom to top; the net-belt 12 is arranged in multiple layers and in parallel from top to bottom, so that the net-belt 12 has a height difference between the net-belt 12 and the net-belt 12, thereby causing the temperature of the net-belt 12 to increase in a gradient from top to bottom (i.e., the temperature of the net-belt 12 decreases in a gradient from bottom to top); thereby the present application sends the carbon micro-powder particles into the net-belt continuous baking machine 1 for drying treatment with a gradient increase in temperature.

[0034] In combination Figure 1As shown, preferably, the mesh belt drive mechanism 13 of the present invention adopts existing frequency conversion transmission technology. The rotation directions of adjacent mesh belts 12 are opposite; thus, the carbon microparticles on the upper mesh belt 12 are conveyed to the discharge end under the rotation of the mesh belt 12, and can completely fall into the feed end of the adjacent lower mesh belt 12 by their own gravity; and the mesh belts 12 can be arranged in a stacked parallel manner, which on the one hand ensures that the drying time of the carbon microparticles on each mesh belt 12 is basically the same, ensuring the drying effect; on the other hand, it effectively reduces the lateral span dimension of the mesh belt continuous baking machine 1 of the present invention, reducing the floor space. To further ensure drying effect and reduce floor space, the movement trajectory of the carbon micropowder particles on the multi-layer mesh belt 12 from top to bottom is connected to form a zigzag path extending from top to bottom; that is, each layer of mesh belt is stacked and arranged in parallel facing each other; furthermore, in order to facilitate the material drop end of the bottom layer mesh belt to be completely aligned with the drying outlet 11 opened on the bottom 14a, only the material drop end of the bottom layer mesh belt 12 extends out a section, and the mesh belts of the other layers have the same length.

[0035] Continue as Figure 1 As shown, further, the temperature of the mesh belt 12 of the present invention increases gradually from top to bottom in the range of 30 to 105°C; the bottom layer of the mesh belt 12 outputs dry particles K1 to the drying outlet 11, and the moisture content of the dry particles K1 is less than 0.1%. The dry particles K1 of the present invention are directly conveyed to the baking machine 2 for baking treatment with a gradually increasing temperature to form carbon microparticles K2, and the moisture content of the carbon microparticles K2 is less than 0.01%.

[0036] Continue as Figure 1As shown, the present application transports the carbon powder particles into the mesh belt type continuous dryer for drying treatment to obtain dry particles K1, and directly transports the dry particles K1 into the roaster for roasting treatment to obtain carbon powder particles K2, and directly transports the carbon powder particles K2 into the pre-carbonization furnace for pre-carbonization treatment to obtain carbon powder pre-carbonization particles K3. As can be seen, the present application realizes continuous drying treatment, roasting treatment and pre-carbonization treatment of the carbon powder particles, integrates the three processes of drying treatment, roasting treatment and pre-carbonization treatment of the carbon powder particles, effectively reduces the waste of heat, reduces the labor cost and time cost caused by material transfer, and avoids the breakage of the carbon powder particles during the transfer process in the existing intermittent process, which cannot meet the feeding requirements of the subsequent vertical continuous graphitization process. At the same time, the present application is provided with a hot-melt thermosetting component in the carbon powder particles, which can directly perform roasting treatment after drying treatment, so that the hot-melt thermosetting component in the carbon powder particles can fully play a good consolidation effect, so that the carbon powder pre-carbonization particles K3 obtained by the carbon powder particle integrated treatment system of the present application have a more complete appearance and more uniform particles. Specifically, in the drying treatment, the mesh belt type continuous dryer 1 is used to perform the layer-by-layer layout of the mesh belt 12 from top to bottom, and the heat source is designed to come from the bottom 14a, so that the temperature of the mesh belt from top to bottom is gradiently increased to perform drying treatment on the carbon powder particles. Further, the temperature of the mesh belt 12 from top to bottom is gradiently increased by 30-105 DEG C for drying treatment. As can be seen, the design of the mesh belt 12 of the present application can continuously perform drying treatment on the carbon powder particles, ensure that the subsequent roasting treatment and pre-carbonization treatment can also be continuously performed, and greatly improve the production efficiency. On the other hand, the layer-by-layer layout of the mesh belt 12 and the gradiently increased drying treatment of the temperature make the carbon powder particles first perform a stable temperature drying process for a period of time during the transmission process, so that the carbon powder particles can be fully heated uniformly, and then jump to another stable temperature for a period of time for heating, which accelerates and optimizes the drying process and effect of the carbon powder particles, avoids the adverse effects of water in the subsequent process, such as the occurrence of side reactions and particle breakage, and further ensures that the subsequent roasting treatment can be performed in order.

[0037] In combination Figures 1-5 As shown, preferably, the mesh belt 12 of the present application is provided in six layers from top to bottom, in order to facilitate the description Figure 1 of the mesh belts 12 in different layers and the corresponding driving mechanisms 13; therefore, in Figure 2 the mesh belt and the driving mechanism corresponding to the mesh belt are represented by different reference numerals and names, as follows: Figure 1 In the six-layer mesh belt 12 and the corresponding driving mechanism 13, in Figure 2The first, second, third, fourth, fifth and sixth mesh belts are sequentially shown from top to bottom as the first mesh belt 12-1, the second mesh belt 12-2, the third mesh belt 12-3, the fourth mesh belt 12-4, the fifth mesh belt 12-5 and the sixth mesh belt 12-6. The first mesh belt driving mechanism 13-1 drives the first mesh belt 12-1 to rotate, the second mesh belt driving mechanism 13-2 drives the second mesh belt 12-2 to rotate, the third mesh belt driving mechanism 13-3 drives the third mesh belt 12-3 to rotate, the fourth mesh belt driving mechanism 13-4 drives the fourth mesh belt 12-4 to rotate, the fifth mesh belt driving mechanism 13-5 drives the fifth mesh belt 12-5 to rotate, and the sixth mesh belt driving mechanism 13-6 drives the sixth mesh belt 12-6 to rotate.

[0038] Continuously combining Figures 1-5 As shown, in the implementation of the carbon micro-powder particle integrated processing system, the pressed carbon micro-powder particles are conveyed to the distributor 1b by the conveying belt 1a, the distributor 1b uniformly distributes the carbon micro-powder particles to the feeding end a of the first mesh belt 12-1, the first mesh belt 12-1 rotates under the driving of the first mesh belt driving mechanism 13-1, and the carbon micro-powder particles carried thereon move along the direction V1 shown in the figure to the discharging end b. Figure 2 The carbon micro-powder particles move to the discharging end b and continue to rotate with the first mesh belt 12-1, and the carbon micro-powder particles at the discharging end b fall onto the feeding end c corresponding to the second mesh belt 12-2 below under the action of gravity. Figure 2 The carbon micro-powder particles move to the discharging end d and continue to rotate with the second mesh belt 12-2, and the carbon micro-powder particles at the discharging end d fall onto the feeding end e corresponding to the third mesh belt 12-3 below under the action of gravity. Figure 2 The carbon micro-powder particles move to the discharging end f and continue to rotate with the third mesh belt 12-3, and the carbon micro-powder particles at the discharging end f fall onto the feeding end g corresponding to the fourth mesh belt 12-4 below under the action of gravity. Figure 2 The carbon micro-powder particles move to the discharging end h and continue to rotate with the fourth mesh belt 12-4, and the carbon micro-powder particles at the discharging end h fall onto the feeding end i corresponding to the fifth mesh belt 12-5 below under the action of gravity. Figure 2The V1 direction moves to the discharging end j, and the carbon powder particles move to the discharging end j and continue to rotate with the fifth mesh belt 12-5. The carbon powder particles at the discharging end j will fall into the feeding end k of the sixth mesh belt 12-6 below under the action of gravity. The sixth mesh belt 12-6 rotates under the drive of the sixth mesh belt driving mechanism 13-6, and the carbon powder particles carried thereon move along the V1 direction to the discharging end n of the sixth mesh belt 12-6. Figure 2 The V2 direction moves to the discharging end m, and the carbon powder particles move to the discharging end m and continue to rotate with the sixth mesh belt 12-6. The carbon powder particles at the discharging end m will fall into the first conveying device 4 below under the action of gravity. The carbon powder particles falling from the discharging end m are the dry particles K1 with a moisture content of less than 0.1% of the present application. It is worth noting that, Figure 2 The V1 direction and the V2 direction are opposite directions. The feeding end a forms the drying feeding port 10 of the mesh belt continuous dryer 1, and the discharging end m forms the drying discharging port 11 of the mesh belt continuous dryer 1.

[0039] Continuing to combine Figures 1-5 As shown, further, the heat source of the mesh belt continuous dryer 1 of the present application is obtained by heat exchange, which is from the bottom to top circulation flow in the mesh belt continuous dryer 1. Specifically, it includes but is not limited to existing ways of generating heat sources such as natural gas combustion heating, electric heating wire heating and heat energy exchange. The heat sources generated by these ways are exchanged with the bottom 14a of the box 14 of the mesh belt continuous dryer 1, so that the bottom 14a of the box 14 of the mesh belt continuous dryer 1 generates hot air with the highest temperature. The fan unit 15 is arranged on the bottom 14a of the mesh belt continuous dryer 1 to blow air upward. The high-temperature hot air of the bottom 14a circulates from bottom to top under the blowing action of the fan unit 15, and transfers heat to the carbon powder particles to be dried on each layer of mesh belt. Since the temperature of the bottom 14a is the highest, and the mesh belts 12 between each layer have a height difference, the temperature between each layer of mesh belt 12 presents a gradient difference.

[0040] Continuing to combine Figure 1 - Figure 5As shown, specifically, the temperature of the heat source in the net-belt continuous dryer 1 from the lowest layer of the net belt to the uppermost layer of the net belt is decreased by an equal gradient from 105 to 30°C, i.e. the temperature of the heat source in the net-belt continuous dryer 1 from the uppermost layer of the net belt to the lowest layer of the net belt is increased by an equal gradient from 30 to 105°C. Specifically, in the above-mentioned embodiment of setting six layers of the net belt 12, the temperature of the sixth net belt 12-6 is 105°C; the temperature of the fifth net belt 12-5 is 90°C; the temperature of the fourth net belt 12-4 is 75°C; the temperature of the third net belt 12-3 is 60°C; the temperature of the second net belt 12-2 is 45°C; and the temperature of the first net belt 12-1 is 30°C. Preferably, the temperature of the heat source in the net-belt continuous dryer 1 from the lowest layer of the net belt to the uppermost layer of the net belt is decreased by an equal gradient from 105 to 45°C, i.e. the temperature of the heat source in the net-belt continuous dryer 1 from the uppermost layer of the net belt to the lowest layer of the net belt is increased by an equal gradient from 45 to 105°C. Specifically, in the above-mentioned embodiment of setting six layers of the net belt 12, the temperature of the sixth net belt 12-6 is 105°C; the temperature of the fifth net belt 12-5 is 93°C; the temperature of the fourth net belt 12-4 is 81°C; the temperature of the third net belt 12-3 is 69°C; the temperature of the second net belt 12-2 is 57°C; and the temperature of the first net belt 12-1 is 45°C.

[0041] Preferably, the temperature gradient between two adjacent net belts 12 in the present application is 12-15°C. The height difference between two adjacent net belts 12 is less than or equal to 300mm.

[0042] Preferably, the height difference between the outlet of the distributor 1b and the drying inlet 10 is 260mm; the height difference between two adjacent net belts 12 is 260mm; the moving speed of the net belt 12 is 0-20m / h, the moving speed and rotating direction of the net belt 12 are controlled by the corresponding net belt driving mechanism 13, the moving speed of all the net belts 12 at the same time is the same; the width of the net belt 12 is 1-2m; and the total distance of the carbon micro-powder particles driven by all the net belts 12 is 60-120m. Further, the height difference between two adjacent net belts 12 is equal to 260mm; the moving speed of the net belt 12 is 20m / h; the width of the net belt 12 is 2m; the total distance of the carbon micro-powder particles driven by all the net belts 12 is 60m; and the drying treatment time is 3h.

[0043] Preferably, the present application is provided with a drying tail gas pipe 15 for discharging tail gas at the top of the continuous mesh belt dryer 1, which is in communication with the first water pool 16. The drying tail gas pipe 15 is used to discharge the high moisture content tail gas in the continuous mesh belt dryer 1, which is connected to the first water pool 16 for absorbing the flue gas and recovering fine dust, which can be used in the granulation process of carbon fine powder in the front-end process, thereby saving cost and preventing environmental pollution.

[0044] In combination Figure 1 - Figure 5 As shown, the dry particles K1 with moisture content less than 0.1% falling from the material dropping end m are directly conveyed to the drying inlet 20 of the drying machine 2 through the first sealing channel of the first conveying device 4. The dry particles K1 entering the drying inlet 20 are conveyed to the drying outlet 21 in the drying machine 2 by spiral tumbling rotation, and the dry particles K1 are subjected to drying treatment with temperature gradient rising in the drying machine 2, and the rising trend of temperature is the same as the travel trend of the dry particles K1 advancing by spiral tumbling in the drying machine 2, that is, the farther the dry particles K1 travel in the drying machine 2, the higher the temperature; finally, the carbon fine powder particles K2 with moisture content less than 0.01% are conveyed out from the drying outlet 21. More specifically, in order to better realize the spiral tumbling rotation drying of the dry particles K1 in the drying machine 2, the drying machine 2 of the present application has an additional drum structure, which has a rotatable drum 22; the rotation of the drum 22 is driven by a drum driving mechanism 22a, which can be realized by using existing variable frequency transmission technology. The drum 22 of the drying machine 2 of the present application is provided with a guide groove 23 in a spiral distribution between the drying inlet 20 and the drying outlet 21, Figure 4 A structural schematic view of the spiral distribution of the guide groove 23 in the drum 22 is given.

[0045] In combination Figure 1 - Figure 5As shown, further, in step S2: baking process, dry particles K1 directly enter the guide trough 23 from the baking inlet 20. The dry particles K1 entering the guide trough 23 are spirally tumbled and baked by the rotation of the drum 22 until they reach the baking outlet 21, forming carbon micropowder particles K2 with a moisture content of less than 0.01%. The dry particles K1 of this invention undergo a baking process with a gradient temperature increase from the baking inlet 20 to the baking outlet 21; specifically, the temperature of the dry particles K1 increases gradually from the baking inlet 20 to the baking outlet 20, ranging from 90 to 300°C. The baking machine 2 uses an external heating method to obtain the heat source, and the heat source acquisition method includes, but is not limited to, existing methods of generating heat sources such as natural gas combustion heating, electric heating wire heating, and heat exchange. The rotation speed of the roller 22 of the present invention is 0.5 to 3.0 revolutions per minute; the inner diameter of the roller 22 of the present invention is 1.5 to 2.0 meters, and the length of the roller 22 of the present invention is 12 to 20 meters; the pitch of the guide groove 23 of the present invention is 100 to 200 millimeters, and the height of the guide groove 23 of the present invention is 200 to 300 millimeters; the baking time of the present invention is 0.5 to 2.0 hours.

[0046] Preferably, the rotation speed of the roller 22 of the present invention is 1.5 revolutions per minute; the inner diameter of the roller 22 of the present invention is 1.5 meters, and the length of the roller 22 of the present invention is 12 meters; the pitch of the guide groove 23 of the present invention is 120 millimeters, and the height of the guide groove 23 of the present invention is 230 millimeters; the baking time of the present invention is 1.0 hour.

[0047] Preferably, in order to facilitate the transfer of dry granules K1 within the baking machine 2, the baking inlet 20 of the present invention is positioned higher than the baking outlet 21.

[0048] like Figures 1-5 As shown, preferably, in the baking process of this invention, the baking inlet 20 is connected to a pipe 25 that connects to a second water tank 25 in the outside; the baking flue gas in the baking machine 2 travels in the opposite direction to the dry particles K1, and the baking flue gas is drawn into the second water tank 25 through the pipe 24; more specifically, in order to integrate resource utilization, the first water tank 16 and the second water tank 25 can be the same water tank. The pipe 24 is used to discharge the baking flue gas in the baking machine 2, which is connected to the second water tank 25 for flue gas absorption and recovery of fine dust. The recovered fine dust can be used in the granulation process of carbon micropowder in the front-end process, thereby saving costs and preventing environmental pollution.

[0049] like Figures 1-5As shown, preferably, the present application is further provided with a cyclone dust collector 6 which is in communication with the drying tail gas pipe 15 and the pipe 24 for recovering the fine dust in the drying tail gas and the roasted flue gas. The fine dust collected by the cyclone dust collector 6 can be more conveniently used in the granulation process of the carbon fine powder in the front-end process.

[0050] In combination Figures 1-5As shown, the present application transports the carbon fine powder particles K2 with a water content less than 0.01% from the baking discharge port 21 of the baking machine 2 to the pre-carbonization inlet port 30 of the pre-carbonization furnace 3 directly through the second sealing channel of the bucket elevator 5. In practice, the second sealing channel provided by the bucket elevator 5 directly transports the carbon fine powder particles K2 to the pre-carbonization inlet port 30 of the pre-carbonization furnace 3, so that the fine powder particles K2 enter the pre-carbonization furnace 3 for pre-carbonization treatment. After the pre-carbonization treatment of the fine powder particles K2 in the pre-carbonization furnace 3, the carbon fine powder pre-carbonization particles K3 with a more complete appearance and more uniform particles are transported out from the pre-carbonization discharge port 31. Specifically, the pre-carbonization furnace 3 of the present application has a vertical structure, the pre-carbonization inlet port 30 is located at the top of the pre-carbonization furnace 3, and the pre-carbonization discharge port 31 is located at the bottom of the pre-carbonization furnace 3. In order to control the pre-carbonization time and discharge speed and prevent air from entering the pre-carbonization furnace 3 from the pre-carbonization discharge port 31, the pre-carbonization discharge port 31 of the present application has a controllable opening and closing structure. The carbon fine powder particles K2 slide from the pre-carbonization inlet port 30 to the pre-carbonization discharge port for pre-carbonization treatment by their own weight. When the pre-carbonization discharge port 31 is opened, the carbon fine powder pre-carbonization particles K3 are output through the bucket closing air output of the rotating multi-bucket closing air feeder 32. In order to better control the closing air of the pre-carbonization discharge port 31, the present application is provided with the rotating multi-bucket closing air feeder 32 in the pre-carbonization discharge port 31, which can airtightly close the pre-carbonization discharge port 31. The pre-carbonization discharge port 31 of the present application forms a controllable discharge closing air structure by the closing air feeder 32. More specifically, the rotating bucket of the rotating multi-bucket closing air feeder 32 is provided with 4-8 buckets. Too few buckets are not conducive to effective closing air, too many buckets are not conducive to normal regulation of the discharge speed, and the pre-carbonization discharge is prone to jamming failure. The diameter of the receiving port of the rotating multi-bucket closing air feeder 32 is greater than the diameter of the pre-carbonization discharge port 31. The rotating multi-bucket closing air feeder 32 of the present application rotates clockwise. A negative pressure extraction device is provided at the left middle part of the rotating multi-bucket closing air feeder 32 for discharging air in the rotating bucket. When the rotating multi-bucket closing air feeder 32 is closed or opened, the pre-carbonization discharge port 31 is isolated from the inside of the pre-carbonization furnace 3 and the outside, so that external air can be effectively prevented from entering (mainly to prevent oxygen in the air from entering, because the entry of oxygen will have a negative impact on the carbon fine powder particles: C+O2=CO2 or C+H2O=CO+H2). The rotating multi-bucket closing air feeder 32 takes out the material after pre-carbonization to obtain the carbon fine powder pre-carbonization particles K3. It can be seen that the furnace bottom discharge of the pre-carbonization furnace of the present application adopts mechanical oxygen isolation, which effectively reduces the waste of heat and material.

[0051] Continue to combine Figures 1-5As shown, further, the pre-carbonization furnace of the present application comprises, from top to bottom, a pre-heating exhaust section 3a, a pre-carbonization section 3b, a heat preservation section 3c, a cooling section 3d and a discharge section 3e, the pre-carbonization feeding port 30 directly communicates with the pre-heating exhaust section 3a, and the pre-carbonization discharge port 31 directly communicates with the discharge section 3e. Specifically, the pre-carbonization feeding port 30 can be understood as the upper opening of the pre-heating exhaust section 3a; the pre-carbonization discharge port 31 is in open and close communication with the discharge section 3e through the above-mentioned gas-tight discharger 32, when the gas-tight discharger 32 is opened, the two are in communication; when the gas-tight discharger 32 is closed, the two are not in communication. Further, the temperature of the pre-heating exhaust section 3a of the present application increases from 200℃ to 500℃ from top to bottom; the temperature of the pre-carbonization section 3b of the present application increases from 500℃ to 1600℃ from top to bottom; the temperature of the heat preservation section 3c of the present application decreases from 1600℃ to 600℃ from top to bottom; the temperature of the cooling section 3d of the present application decreases from 600℃ to 100℃ from top to bottom; the temperature of the discharge section 3e of the present application decreases from 100℃ to 40℃ from top to bottom; the pre-carbonization processing time of the present application is 2-10 hours.

[0052] Continuing with Figures 1-5 As shown, preferably, the high-temperature gas overflowing from the pre-carbonization feeding port 30 of the pre-carbonization furnace 3 of the present application is unidirectionally introduced to the mesh-belt continuous dryer 1 for heat exchange. Specifically, the present application further comprises an air induction device, the air induction device comprises a conveying pipeline 33 and an air induction fan, one end of the conveying pipeline 33 communicates with the top of the pre-carbonization furnace 3, the other end of the conveying pipeline 33 is connected to the mesh-belt continuous dryer 1 for heat exchange, and the air induction fan is arranged on the conveying pipeline 33 to unidirectionally introduce the high-temperature gas overflowing from the pre-carbonization furnace to the mesh-belt continuous dryer 1 for heat exchange. The air induction fan arranged on the conveying pipeline 33 is used for blowing air, so that the high-temperature gas overflowing from the pre-carbonization furnace 3 can only move towards the mesh-belt continuous dryer 1 (i.e., the high-temperature gas is unidirectionally introduced to the mesh-belt continuous dryer 1). The present application effectively reduces the energy consumption of the mesh-belt continuous dryer 1 by unidirectionally introducing the high-temperature gas overflowing from the pre-carbonization feeding port 30 to the mesh-belt continuous dryer 1 for heat exchange, and the air induction fan is set as a variable frequency fan. More specifically, the pressure of the outlet of the high-temperature gas overflowing from the pre-carbonization feeding port 30 of the present application is (P0-0)~(P0+30) Pa, and the pressure of the outlet of the high-temperature gas overflowing from the pre-carbonization feeding port 30 is controlled by the air induction fan; wherein P0 is the standard atmospheric pressure value; controlling the outlet pressure within this range not only ensures the unidirectional flow of the overflowing high-temperature gas to the mesh-belt continuous dryer 1, but also effectively avoids excessive negative pressure which is not conducive to oxygen isolation in the pre-carbonization furnace 3, and effectively avoids excessive positive pressure which is not conducive to the overflow of the high-temperature gas generated in the pre-carbonization furnace 3.

[0053] The carbon micro-powder pre-carbonization particles K3 produced according to the above-mentioned embodiments of the present application (see Figure 6The carbon micro-powder particles are in the form of apparent integrity, without pulverization and without burning loss, and can meet the needs of the vertical continuous graphitization process.

[0054] Comparative Example 1

[0055] On the basis of the carbon micro-powder particle integrated processing system of the present application, the use of the mesh belt type continuous dryer 1 is skipped (i.e., the drying treatment is omitted), so that the carbon micro-powder particles output by the distributor 1b directly enter the roaster 2 through the roasting feed inlet 20 for roasting treatment. Meanwhile, the moisture content of the micro-powder particles K2 output after the roasting treatment is less than 0.01%, and the remaining hardware devices, process parameters, environmental factors, etc. are unchanged. Under the above conditions, the product delivered by the pre-carbonization discharge outlet of the final pre-carbonization furnace is the carbon micro-powder pre-carbonization particles K3`, which have a relatively serious breakage and pulverization phenomenon. The carbon micro-powder pre-carbonization particles K3` product is shown in detail in Table 1. Figure 7

[0056] Comparative Example 2

[0057] On the basis of the carbon micro-powder particle integrated processing system of the present application, the use of the roaster 2 is skipped (i.e., the roasting treatment is omitted), so that the dry particles K1 output by the drying discharge outlet 11 directly enter the pre-carbonization furnace through the pre-carbonization feed inlet 30 for pre-carbonization treatment. Meanwhile, the moisture content of the dry particles K1 output after the drying treatment is less than 0.1%, and the hardware devices and process parameters used are unchanged. Under the above conditions, the product delivered by the pre-carbonization discharge outlet of the final pre-carbonization furnace is the carbon micro-powder pre-carbonization particles K3`` which have a relatively serious breakage and pulverization phenomenon. The carbon micro-powder pre-carbonization particles K3`` product is shown in detail in Table 2. Figure 8

[0058] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present examples are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the description given above, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims. While the application has been described with reference to exemplary embodiments, it is to be understood that the application is not limited to the disclosed exemplary embodiments. Instead, it is the intention that additions, deletions, modifications, and substitutions be considered as falling within the scope and spirit of the application. Accordingly, many modifications, variations, alternatives, and equivalents can be made in the design of the present application without departing from the spirit or scope of the application.​​

Claims

1. An integrated carbon micropowder particle processing system, used for the integrated continuous processing of carbon micropowder particles through three stages: drying, baking, and pre-carbonization, characterized in that... It comprises: a continuous mesh belt dryer for drying carbon powder particles and obtaining dry particles K1, which comprises a box body and a mesh belt, a mesh belt driving mechanism and a fan unit arranged in the box body, a drying inlet is arranged at the top of the box body opposite to the feeding end of the uppermost mesh belt; the discharging end of the lowermost mesh belt outputs dry particles K1 to the drying outlet; a heat exchanger is arranged at the bottom of the box body; a roaster for roasting dry particles K1 and obtaining carbon powder particles K2, dry particles K1 are conveyed in the roaster from the roasting inlet to the roasting outlet by the roasting mode of spiral rolling, and carbon powder particles K2 are formed; a pre-carbonization furnace for pre-carbonizing carbon powder particles K2 and obtaining carbon powder pre-carbonized particles K3, carbon powder particles K2 are conveyed from the pre-carbonization inlet to the pre-carbonization outlet of the pre-carbonization furnace for pre-carbonization treatment and carbon powder pre-carbonized particles K3 are formed.

2. The carbon-fines-in-particle integrated processing system of claim 1, wherein The temperature of the uppermost mesh belt to the lowermost mesh belt in the continuous mesh belt dryer increases by equal gradient from 30 to 105℃; the mesh belts are arranged in layers from top to bottom, and the temperature gradient between adjacent mesh belts differs by 12-15℃; the height difference between adjacent mesh belts is 200-300mm.

3. The carbon fines particulate integrated treatment system of claim 1, wherein, The top of the continuous mesh belt dryer is provided with a drying tail gas pipe for discharging tail gas, which communicates with the first water pool outside.

4. The carbon fines particulate integrated treatment system of claim 1, wherein, In the drying process, the moving speed of the mesh belt is 0-20m / h; the width of the mesh belt is 1-2m; and the total distance of the carbon powder particles driven by the mesh belt is 60-120m.

5. The carbon fines particulate integrated treatment system of claim 1, wherein, The roaster is of an external heating type roller structure, which has a rotatable roller; a guide groove in spiral distribution is arranged between the roasting inlet and the roasting outlet of the roaster; dry particles K1 enter the guide groove from the roasting inlet, and the dry particles K1 in the guide groove spiral roll and travel with the rotation of the roller to the roasting outlet to form carbon powder particles K2.

6. The carbon-fines particulate integrated processing system of claim 5, wherein The rotation speed of the roller is 0.5-3.0r / min; the inner diameter of the roller is 1.5-2.0m, and the length of the roller is 12-20m; the pitch of the guide groove is 100-200mm, and the height of the guide groove is 200-300mm.

7. The carbon fines particulate integrated treatment system of claim 1, wherein, The temperature of dry particles K1 from the roasting inlet to the roasting outlet increases by gradient from 90℃ to 300℃; the roasting inlet is connected with a pipeline communicating with the second water pool outside, and the roasting flue gas in the roaster is opposite to the traveling direction of dry particles K1 and is sucked into the second water pool outside by the pipeline.

8. The carbon fines particulate integrated treatment system of claim 1, wherein, The pre-carbonization furnace is vertically structured, the pre-carbonization inlet is located at the top, and the pre-carbonization outlet is located at the bottom; a rotary multi-bucket closed-air discharger capable of airtightly closing the pre-carbonization outlet is arranged in the pre-carbonization outlet; the caliber of the receiving port of the rotary multi-bucket closed-air discharger is larger than that of the pre-carbonization outlet; the rotary multi-bucket closed-air discharger rotates clockwise; a negative pressure extraction device is arranged at the left middle part of the rotary multi-bucket closed-air discharger, and is used for discharging air in the rotary bucket; the pre-carbonization outlet is isolated from the inside of the pre-carbonization furnace and the outside; the rotary multi-bucket closed-air discharger airtightly takes out the pre-carbonized material to obtain the carbon micro-powder pre-carbonized particles K3.

9. The carbon fines particulate integrated treatment system of claim 1, wherein, The pre-carbonization furnace comprises, from top to bottom, a preheating exhaust section, a pre-carbonization section, a heat preservation section, a cooling section and a discharge section; the pre-carbonization inlet is directly communicated with the preheating exhaust section, and the pre-carbonization outlet is directly communicated with the discharge section; the temperature of the preheating exhaust section increases from 200℃ to 500℃ from top to bottom; the temperature of the pre-carbonization section increases from 500℃ to 1600℃ from top to bottom; the temperature of the heat preservation section decreases from 1600℃ to 600℃ from top to bottom; the temperature of the cooling section decreases from 600℃ to 100℃ from top to bottom; the temperature of the discharge section decreases from 100℃ to 40℃ from top to bottom; the high-temperature gas overflowing from the pre-carbonization inlet of the pre-carbonization furnace is unidirectionally introduced to the mesh belt type continuous dryer for heat exchange.

10. The carbon fines particulate integrated treatment system of claim 1, wherein, The pressure of the outlet of the pre-carbonization inlet overflowing high-temperature gas is controlled by the air induction fan, and the pressure of the outlet is (P0-0)~(P0+30) Pa; wherein, P0 is the standard atmospheric pressure value.

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