A high-purity graphite purification system

Abstract

The invention discloses a high-purity graphite purification system, comprising a coarse particle purification tank and an exhaust gas emission pipe, wherein a fine particle purification tank is provided on one side of the coarse particle purification tank, a mixed gas conveying component for exhaust gas conveying is provided between the coarse particle purification tank and the fine particle purification tank, a gas diversion component is provided in the fine particle purification tank, and a layered placement component is provided in the fine particle purification tank; coarse particle graphite and fine particle graphite are purified respectively by the coarse particle purification tank and the fine particle purification tank, which can avoid fine particles filling in the gaps between the coarse particles and affecting the circulation of chlorine, so that chlorine can fully contact and react with graphite particles when circulating through the gaps between the coarse particles, thereby improving the purification effect of the coarse particles, and micro-reacting chlorine and exhaust gas are passed into the fine particle purification tank through the mixed gas conveying component and the gas diversion component, and the fine particles are purified by using the chlorine that does not participate in the reaction in the air flow after the coarse particles are purified.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite purification, in particular to a high-purity graphite purification system. Background Art

[0002] High-purity graphite is widely used as an important material in industries such as industry and military industry. However, the graphite ore at the mining site contains a large amount of silicate impurities, so the graphite needs to be purified. Currently, graphite can be purified by flotation, alkaline acid method, hydrofluoric acid method, chlorination roasting method, high-temperature method, etc. Among them, the chlorination roasting method achieves the effect of removing graphite by reacting chlorine and impurities in graphite at high temperature. During the reaction, chlorine contacts the surface of the granulated graphite particles. However, in actual production, during the graphite granulation process, graphite particles with standard diameters contain some finer graphite particles. When the graphite material is added, coarse graphite and fine graphite enter the reaction tank together. The fine graphite particles will be mixed in the gaps of the coarse graphite particles, which will affect the full contact between chlorine and graphite particles, and affect the reaction effect and efficiency of graphite purification. For this reason, we propose a high-purity graphite purification system. Summary of the Invention

[0003] The main purpose of the present invention is to provide a high-purity graphite purification system.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A high-purity graphite purification system includes a coarse particle purification tank for purifying coarse particle graphite and an exhaust gas discharge pipe. A fine particle purification tank for purifying fine particle graphite is provided on one side of the coarse particle purification tank. A mixed gas conveying assembly for conveying exhaust gas is provided between the coarse particle purification tank and the fine particle purification tank.

[0006] The mixed gas delivery assembly includes a mixed gas delivery pipeline, a gas temperature regeneration heater, and an exhaust gas unloading pipe. The mixed gas delivery pipeline is fixedly connected to the exhaust gas discharge pipe. The gas temperature regeneration heater is installed on the outer wall of the mixed gas delivery pipeline. The exhaust gas unloading pipe is fixedly connected to the top of the mixed gas delivery pipeline.

[0007] The fine particle purification tank is provided with a gas diversion component for blowing fine particle graphite, and the fine particle purification tank is provided with a layered placement component for arranging fine particle graphite in layers.

[0008] A further improvement of the present invention is that the gas diversion assembly includes a supporting plate, a mixed gas intake and gas transmission pipe, a connecting pipe and an impact capillary; the supporting plate is fixedly connected to the inner wall of the bottom end of the fine particle purification tank; the mixed gas intake and gas transmission pipe is fixedly connected to the bottom end of the supporting plate; the other end of the mixed gas intake and gas transmission pipe is fixedly connected to the mixed gas delivery pipeline; the connecting pipe is installed in the supporting plate; the impact capillary is fixedly connected to the top of the connecting pipe; the mixed gas delivery pipeline, the mixed gas intake and gas transmission pipe, the connecting pipe and the impact capillary are connected.

[0009] A further improvement of the present invention is that the layered placement component includes a supporting interception frame, a bottom mesh plate and a bearing mesh plate, the supporting interception frame is arranged in the fine particle purification tank, the bottom mesh plate is fixedly connected to the bottom end of the supporting interception frame, and the bearing mesh plate is arranged in the supporting interception frame.

[0010] A further improvement of the present invention is that a heat-insulating pipe sleeve is fixedly connected to the outer wall of the mixed gas delivery pipeline, and one end of the mixed gas delivery pipeline extends into the bottom of the fine particle purification tank and is connected to the mixed gas inlet and gas delivery pipe.

[0011] A further improvement of the present invention is that the bottom end of the bearing mesh plate is detachably connected to a support rod, and the height of the bearing mesh plate located at the top is lower than the height of the top end of the support interception frame.

[0012] A further improvement of the present invention is that it comprises:

[0013] Graphite purification pretreatment and preparation

[0014] Use screening equipment to screen the graphite after granulation treatment, store the coarse particles and fine particles after screening separately, add the coarse particles to the coarse particle purification tank and wait for purification, then place the fine particles in layers in the fine particle purification tank. When placing them, take out the supporting mesh and support rod from the support interception frame, spread some fine particle graphite on the top of the bottom mesh, then place one of the supporting mesh plates and support rods on the top of the bottom mesh, spread some fine particle graphite on the top of the supporting mesh, repeat the above operation until the supporting mesh plates and support rods are placed. Then, some fine-grained graphite is spread flat on the top of the supporting mesh again. After the graphite is spread flat, the supporting mesh and the support rod are used again to place it in the support interception frame. The layered assembly is placed as a whole in the fine-grained purification tank. The exhaust pipe, the mixed gas delivery pipe, the mixed gas intake and delivery pipe, the connecting pipe and the impact tube are installed and checked for connectivity. The gas temperature recovery heater is started for preheating. The coarse-grained graphite and the fine-grained graphite are purified respectively through the coarse-grained purification tank and the fine-grained graphite, which can prevent the fine particles from filling the gaps between the coarse particles and affecting the circulation of chlorine.

[0015] Graphite purification process

[0016] Chlorine is introduced into the coarse particle purification tank, and the coarse particle graphite is roasted and purified under the high temperature environment of the coarse particle purification tank. The chlorine that does not participate in the reaction is discharged together with the exhaust gas through the exhaust pipe, and then enters the mixed gas delivery pipeline, and is transported to the mixed gas inlet gas delivery pipe, the connecting pipe and the impact capillary through the mixed gas delivery pipeline, and then is sprayed through multiple impact capillary tubes. The chlorine and the exhaust gas pass through the bottom mesh plate into the support interception frame, and the fine particle graphite is blown up by the airflow, and comes into contact with the fine particle graphite during the gas circulation process, and reacts with the fine particle graphite in the high temperature environment of the fine particle purification tank to purify the fine particle graphite. Then the airflow passes through the supporting mesh plate and comes into contact with the fine particle graphite on the upper layer, lifts the fine particle graphite and fully contacts and reacts with the fine particle graphite. After the purification is completed, the graphite particles are taken out from the coarse particle purification tank and the fine particle purification tank respectively and enter the subsequent cooling process.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By purifying the coarse-particle graphite and the fine-particle graphite respectively through the coarse-particle purification tank and the fine-particle purification tank, it is possible to avoid the fine particles filling the gaps between the coarse particles and affecting the circulation of chlorine, so that the chlorine can fully contact and react with the graphite particles when flowing through the gaps between the coarse particles, thereby improving the purification effect of the coarse particles, and passing the micro-reacted chlorine and tail gas into the fine-particle purification tank through the mixed gas conveying component and the gas diversion component, and utilizing the chlorine that does not participate in the reaction in the air flow after the coarse particles are purified to purify the fine particles, thereby reducing the amount of chlorine introduced into the purification system, reducing raw material consumption and exhaust gas emissions, and when purifying the fine-particle graphite, the fine-particle graphite can be blown up by the combined action of chlorine and tail gas, so that the fine-particle graphite can also fully contact and react with chlorine, thereby improving the purification effect of the fine-particle graphite. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a flow chart of a high-purity graphite purification system.

[0020] Figure 2 This is a front view of a high-purity graphite purification system of the present invention.

[0021] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0022] Figure 4 This is a schematic diagram of the structure of layered components in a high-purity graphite purification system of the present invention.

[0023] Figure 5 This is a bottom view of the supporting mesh plate and support rods in a high-purity graphite purification system of the present invention.

[0024] In the figure: 1. Coarse particle purification tank; 11. Tail gas emission pipe; 2. Fine particle purification tank; 3. Mixed gas conveying assembly; 31. Mixed gas conveying pipeline; 32. Gas reheating heater; 33. Tail gas unloading pipe; 34. Insulation pipe sleeve; 4. Gas diversion assembly; 41. Support plate; 42. Mixed gas inlet and outlet pipe; 43. Connecting pipe; 44. Impact capillary; 5. Layered placement assembly; 51. Support interception frame; 52. Bottom mesh plate; 53. Support mesh plate; 54. Support rod. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual drawings. They should not be understood as limiting this patent. In order to better illustrate the specific embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1-5 :

[0028] It includes a coarse particle purification tank 1 for purifying coarse particle graphite and an exhaust gas discharge pipe 11. A fine particle purification tank 2 for purifying fine particle graphite is provided on one side of the coarse particle purification tank 1. A mixed gas conveying component 3 for exhaust gas conveying is provided between the coarse particle purification tank 1 and the fine particle purification tank 2. The mixed gas conveying component 3 includes a mixed gas conveying pipeline 31, a gas temperature recovery heater 32 and an exhaust gas unloading pipe 33. The mixed gas conveying pipeline 31 is fixedly connected to the exhaust gas discharge pipe 11. The gas temperature recovery heater 32 is installed on the outer wall of the mixed gas conveying pipeline 31. The exhaust gas unloading pipe 33 is fixedly connected to the top of the mixed gas conveying pipeline 31. A gas diversion component 4 for blowing fine particle graphite is provided in the fine particle purification tank 2. A layered placement component 5 for arranging fine particle graphite in layers is provided in the fine particle purification tank 2.

[0029] In the specific implementation process, first, the granulated graphite is screened using a screening device, and the coarse particles and fine particles after screening are stored separately. The coarse particles are added to the coarse particle purification tank 1 to wait for purification, and then the fine particles are placed in layers in the fine particle purification tank 2. When placing, the supporting mesh plate 53 and the support rod 54 are taken out from the support interception frame 51, and some fine particles of graphite are spread on the top of the bottom mesh plate 52. Then, one of the supporting mesh plates 53 and the support rod 54 is placed on the top of the bottom mesh plate 52, and some fine particles of graphite are spread on the top of the supporting mesh plate 53. Repeat the above operation to clean the supporting mesh plate 53. After the plate 53 and the support rod 54 are placed, some fine-grained graphite is spread on the top of the supporting mesh plate 53 again. After the graphite is spread, the supporting mesh plate 53 and the support rod 54 are used again to place them in the support interception frame 51. The layered placement component 5 is placed as a whole in the fine particle purification tank 2. The exhaust pipe 11, the mixed gas delivery pipeline 31, the mixed gas intake and delivery pipe 42, the connecting pipe 43 and the impact tube 44 are installed and checked for connection. The gas temperature recovery heater 32 is started for preheating until the temperature of the gas temperature recovery heater 32 reaches the set reaction temperature. Then, chlorine is introduced into the coarse particle purification tank 1. The coarse-grained graphite is calcined and purified in the high-temperature environment of the pure tank 1. The chlorine that does not participate in the reaction is discharged together with the tail gas through the tail gas exhaust pipe 11, and then enters the mixed gas delivery pipe 31. It is transported to the mixed gas inlet gas delivery pipe 42, the connecting pipe 43 and the impact tube 44 through the mixed gas delivery pipe 31, and then injected through multiple impact tubes 44. The chlorine and the tail gas pass through the bottom mesh plate 52 and enter the support interception frame 51. The fine-grained graphite is blown up by the air flow, contacts with the fine-grained graphite during the gas circulation process, and reacts with the fine-grained graphite in the high-temperature environment of the fine-grained purification tank 2, thereby The graphite is purified, and then the air flow passes through the supporting mesh plate 53 and contacts the fine-grained graphite located on the upper layer, lifts the fine-grained graphite and fully contacts and reacts with the fine-grained graphite. After the purification is completed, the graphite particles are taken out from the coarse-grained purification tank 1 and the fine-grained purification tank 2 respectively and enter the subsequent cooling process. In the actual screening process, the amount of coarse-grained graphite is much greater than the amount of fine-grained graphite. The actual amount of chlorine introduced into the coarse-grained purification tank 1 is five to ten times the amount required for the theoretical reaction. The air flow discharged with the tail gas contains a large amount of unreacted chlorine, and the chlorine contained therein is sufficient to provide the amount for the subsequent fine-grained graphite purification reaction.

[0030] The gas diversion assembly 4 includes a supporting plate 41, a mixed gas inlet and gas delivery pipe 42, a connecting pipe 43 and an impact capillary 44. The supporting plate 41 is fixedly connected to the inner wall of the bottom end of the fine particle purification tank 2, the mixed gas inlet and gas delivery pipe 42 is fixedly connected to the bottom end of the supporting plate 41, the other end of the mixed gas inlet and gas delivery pipe 42 is fixedly connected to the mixed gas delivery pipe 31, the connecting pipe 43 is installed in the supporting plate 41, and the impact capillary 44 is fixedly connected to the top of the connecting pipe 43. The mixed gas delivery pipe 31, the mixed gas inlet and gas delivery pipe 42, the connecting pipe 43 and the impact capillary 44 are connected; connecting the mixed gas delivery pipe 31 and the connecting pipe 43 by multiple mixed gas inlet and gas delivery pipes 42 can more evenly transport the chlorine that does not participate in the reaction together with the tail gas into the connecting pipe 43, and the evenly distributed impact capillary 44 evenly sprays the chlorine that does not participate in the reaction together with the tail gas to the bottom mesh plate 52 to maintain the balance of airflow everywhere, and the supporting plate 41 plays a main bearing role.

[0031] The layered placement component 5 includes a support interception frame 51, a bottom mesh plate 52 and a bearing mesh plate 53. The support interception frame 51 is arranged in the fine particle purification tank 2, the bottom mesh plate 52 is fixedly connected to the bottom end of the support interception frame 51, and the bearing mesh plate 53 is arranged in the support interception frame 51; the support interception frame 51 supports the bearing mesh plate 53 and the support rod 54, so as to facilitate the placement of fine particle graphite by the bottom mesh plate 52 and the bearing mesh plate 53. In actual use, the amount of graphite to be laid flat in each layer and the number of layers to be laid flat are selected according to the amount of fine particle graphite.

[0032] An insulation pipe sleeve 34 is fixedly connected to the outer wall of the mixed gas delivery pipeline 31, and one end of the mixed gas delivery pipeline 31 extends into the bottom of the fine particle purification tank 2 and is connected to the mixed gas inlet pipe 42; by providing the insulation pipe sleeve 34, the mixed gas delivery pipeline 31 and the gas in the mixed gas delivery pipeline 31 can be insulated, thereby reducing the loss of gas temperature in the mixed gas delivery pipeline 31.

[0033] The bottom end of the supporting mesh plate 53 is detachably connected to a support rod 54, and the height of the top supporting mesh plate 53 is lower than the height of the top of the supporting interception frame 51; by setting the support rod 54, multiple supporting mesh plates 53 are separated, providing space for the flying of fine particles of graphite, and the height of the supporting interception frame 51 is higher to prevent fine particles of graphite from flying out.

[0034] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-purity graphite purification system, comprising a coarse particle purification tank (1) for purifying coarse particle graphite and an exhaust gas discharge pipe (11), characterized in that: A fine particle purification tank (2) for purifying fine particle graphite is provided on one side of the coarse particle purification tank (1), and a mixed gas delivery component (3) for delivering tail gas is provided between the coarse particle purification tank (1) and the fine particle purification tank (2); The mixed gas delivery assembly (3) comprises a mixed gas delivery pipeline (31), a gas temperature recovery heater (32) and an exhaust gas unloading pipe (33), wherein the mixed gas delivery pipeline (31) is fixedly connected to the exhaust gas discharge pipe (11), the gas temperature recovery heater (32) is installed on the outer wall of the mixed gas delivery pipeline (31), and the exhaust gas unloading pipe (33) is fixedly connected to the top end of the mixed gas delivery pipeline (31); The fine particle purification tank (2) is provided with a gas diversion component (4) for blowing fine particle graphite, and the fine particle purification tank (2) is provided with a layered placement component (5) for arranging fine particle graphite in layers.

2. A high-purity graphite purification system according to claim 1, characterized in that: The gas diversion assembly (4) includes a supporting plate (41), a mixed gas inlet and gas delivery pipe (42), a connecting pipe (43) and an impact capillary (44), wherein the supporting plate (41) is fixedly connected to the inner wall of the bottom end of the fine particle purification tank (2), the mixed gas inlet and gas delivery pipe (42) is fixedly connected to the bottom end of the supporting plate (41), the other end of the mixed gas inlet and gas delivery pipe (42) is fixedly connected to the mixed gas delivery pipeline (31), the connecting pipe (43) is installed in the supporting plate (41), the impact capillary (44) is fixedly connected to the top end of the connecting pipe (43), and the mixed gas delivery pipeline (31), the mixed gas inlet and gas delivery pipe (42), the connecting pipe (43) and the impact capillary (44) are connected.

3. A high-purity graphite purification system according to claim 2, characterized in that: The layered placement assembly (5) comprises a support interception frame (51), a bottom mesh plate (52) and a bearing mesh plate (53); the support interception frame (51) is arranged in the fine particle purification tank (2); the bottom mesh plate (52) is fixedly connected to the bottom end of the support interception frame (51); and the bearing mesh plate (53) is arranged in the support interception frame (51).

4. A high-purity graphite purification system according to claim 3, characterized in that: The outer wall of the mixed gas delivery pipe (31) is fixedly connected to a heat-insulating pipe sleeve (34), and one end of the mixed gas delivery pipe (31) extends into the bottom of the fine particle purification tank (2) and communicates with the mixed gas inlet and delivery pipe (42).

5. A high-purity graphite purification system according to claim 3, characterized in that: The bottom end of the supporting mesh plate (53) is detachably connected to a support rod (54), and the height of the supporting mesh plate (53) located at the top is lower than the height of the top end of the supporting interception frame (51).

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