Graphitization furnace with carbon blocks

Abstract

The utility model discloses a graphitization furnace with carbon blocks. The technical problem that in the prior art, the graphitization effect of small-specification to-be-graphitized products is poor is solved. The graphitization furnace comprises a furnace body and a carbon block. The first electrode and the second electrode are located at the two ends, in the current flowing direction, of the containing cavity respectively. The carbon block is positioned in the accommodating cavity, the carbon block is provided with a plurality of cavities which are used for accommodating a first product to be graphitized and are provided with openings, and the openings face the first electrode. And along the current flowing direction, the carbon block and the first electrode and / or the second electrode are arranged at intervals, so that a space for accommodating a second product to be graphitized is formed. The graphitization furnace with the carbon blocks can be used for graphitizing small-specification and large-specification to-be-graphitized products at the same time, and the graphitization effect of the small-specification to-be-graphitized products is good.

Description

Technical Field

[0001] The present application belongs to the technical field of graphitization furnaces, and in particular relates to a graphitization furnace having a carbon block. Background Art

[0002] Graphitization furnaces include vertical graphitization furnaces and horizontal graphitization furnaces. The internal heating series graphitization furnace has the characteristics of short power-on time, low power consumption, no resistance material, and small temperature difference in the furnace core. When the internal heating series graphitization furnace is used for graphitization production, the product to be graphitized is first placed in the middle of the electrode of the graphitization furnace, symmetrical with the center of the furnace head conductive electrode, and graphitized under the protection of fillers such as metallurgical coke or calcined coke.

[0003] In the related art, graphitization furnaces are mostly industrial furnaces with very large inner cavity sizes, so they can be used to produce larger products, such as cathode carbon blocks for larger aluminum electrolytic cells. However, the specifications of graphitized products are diverse, some are larger, such as the cathode carbon blocks for the aforementioned aluminum electrolytic cells, and some are smaller, such as graphitized product samples used for research in laboratories. For graphitization furnaces with very large inner cavities, small-sized products to be graphitized are usually placed on one side of large-sized products to be graphitized, and the small-sized products to be graphitized are heated by thermal radiation from the large-sized products to be graphitized.

[0004] However, this method of using the heat radiation of the large-sized product to be graphitized to heat the small-sized product to be graphitized has a low temperature, and the graphitization effect of the small-sized product to be graphitized is not good. Utility Model Content

[0005] In order to solve the technical problem of poor graphitization effect in producing small-sized graphitized products using industrial graphitization furnaces, the present application provides a graphitization furnace with a carbon block.

[0006] The present application provides a graphitization furnace having a carbon block, comprising:

[0007] A furnace body, provided with a containing cavity and a first electrode and a second electrode respectively located at two ends of the containing cavity along the current flow direction of the graphitization furnace;

[0008] A carbon block is located in the containing cavity, wherein the carbon block is provided with a plurality of chambers for containing the first product to be graphitized, wherein the chambers have openings, and the openings face the first electrode;

[0009] Wherein, along the current flow direction, the carbon block is spaced apart from the first electrode and / or the second electrode to form a space for accommodating a second product to be graphitized, and the size of the chamber is smaller than the size of the second product to be graphitized.

[0010] In some embodiments, the carbon blocks are provided in plurality, and the plurality of carbon blocks are arranged in sequence along the flow of current, and the plurality of carbon blocks are spaced apart from the first electrode and / or the second electrode to form a space for accommodating the second product to be graphitized.

[0011] In some embodiments, two adjacent carbon blocks are spaced apart to form a space for accommodating the second product to be graphitized.

[0012] In some embodiments, a chamber cross-sectional area of ​​the carbon block perpendicular to the current flow direction is larger than a cross-sectional area of ​​the first product to be graphitized perpendicular to the current flow direction.

[0013] In some embodiments, the gap between the side wall of the chamber and the first product to be graphitized is 5-10 mm.

[0014] In some embodiments, the carbon block includes a body and a conductive block, the conductive block is located at the opening, the body and the conductive block together form a space for accommodating the first product to be graphitized, and the two sides of the conductive block along the current flow direction are respectively a first side and a second side, the first side is in contact with the first product to be graphitized; the second side is in contact with the second product to be graphitized or the first electrode. In some embodiments, the size of the conductive block along the vertical direction is 20-30 mm.

[0015] In some embodiments, a projection of the first product to be graphitized along the current flow direction falls within the first side surface.

[0016] In some embodiments, the shape of the chamber is the same as the shape of the first product to be graphitized; the shape of the chamber is cylindrical, cubic or cuboid.

[0017] In some embodiments, the furnace body is provided with a plurality of accommodating cavities and the same number of first electrodes and second electrodes as the accommodating cavities, the first electrodes are installed one-to-one at the first ends of the accommodating cavities along the current flow direction, and the second electrodes are installed one-to-one at the second ends of the accommodating cavities along the current flow direction;

[0018] The number of the carbon blocks is the same as the number of the accommodating cavities, and the carbon blocks are arranged in the accommodating cavities one by one.

[0019] According to an embodiment of the present application, a graphitization furnace with a carbon block is provided, comprising a furnace body and a carbon block. The furnace body is provided with a receiving cavity and a first electrode and a second electrode respectively located at both ends of the receiving cavity along the current flow direction. The carbon block is located in the receiving cavity, and the carbon block is provided with a plurality of chambers with openings for accommodating a first product to be graphitized, and the openings face the first electrode. In the current flow direction, the carbon block is spaced apart from the first electrode and / or the second electrode to form a space for accommodating a second product to be graphitized.

[0020] The carbon block has a plurality of chambers, and the chambers have openings, so that the first product to be graphitized, that is, a small-sized product to be graphitized, can be placed in the chamber. The carbon block makes the plurality of small-sized first products to be graphitized as a whole, and the cross-sectional dimension of the carbon block perpendicular to the current flow direction can be comparable to the cross-sectional dimension corresponding to the large-sized product to be graphitized.

[0021] Along the current flow direction, the carbon block is spaced from the first electrode and / or the second electrode to form a space for accommodating the second product to be graphitized. That is to say, after the first product to be graphitized and the second product to be graphitized are placed in the accommodating cavity, the arrangement of each structure along the current flow direction may be the first electrode, the carbon block, the second product to be graphitized and the second electrode, or the first electrode, the second product to be graphitized, the carbon block and the second electrode, or the first electrode, the second product to be graphitized, the carbon block, the second product to be graphitized and the second electrode.

[0022] Taking the carbon block close to the second electrode and the second product to be graphitized close to the first electrode as an example, the feeding process is introduced: first, multiple first products to be graphitized are placed one by one in multiple chambers of the carbon block through the openings, and then the carbon block with the first product to be graphitized is placed close to the second electrode, with the opening of the carbon block facing the first electrode, and the two end faces of the first product to be graphitized along the direction of current flow are flush with the bottom of the cavity and the top surface of the carbon block respectively, and then the second product to be graphitized is placed in the cavity, along the direction of current flow, the second product to be graphitized is arranged in affixed with the top surface of the carbon block and the first product to be graphitized in the carbon block, and is in affixed with the first electrode. The carbon block itself is a conductor. After power is turned on, the current path is divided into two types: one is the first electrode, the second product to be graphitized, the carbon block and the second electrode, and the other is the first electrode, the second product to be graphitized, the first product to be graphitized, the cavity bottom of the carbon block and the second electrode. Therefore, electric current will flow through the first product to be graphitized, thereby heating and raising the temperature, thereby improving the graphitization effect of the first product to be graphitized.

[0023] Compared with the prior art in which the first product to be graphitized is heated by heat radiation from the second product to be graphitized, in the present application, the first product to be graphitized is heated by the electric current passing through itself during the graphitization process, and the heating temperature is high, so the graphitization effect is good, and a large-sized second product to be graphitized and a small-sized first product to be graphitized can be produced in one furnace at the same time, the products are rich, and the space utilization rate in the furnace body is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a graphitization furnace in one or more embodiments of the present application is shown.

[0025] Figure 2 Shows Figure 1 Schematic diagram of the structure of carbon blocks in a graphitization furnace.

[0026] Figure 3 A top view of the assembly of a carbon block body of a graphitization furnace and a first product to be graphitized in one or more embodiments is shown.

[0027] Description of reference numerals:

[0028] 100-furnace body, 110-accommodation chamber;

[0029] 200-carbon block, 210-chamber, 220-body, 230-conductive block;

[0030] 300 - first electrode; 400 - second electrode; 500 - first product to be graphitized; 600 - second product to be graphitized. DETAILED DESCRIPTION

[0031] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] The embodiment of the present application provides a graphitization furnace with a carbon block. The graphitization furnace is an industrial graphitization furnace that can simultaneously produce large-sized graphitized products and small-sized graphitized products, and the graphitization effects of the large-sized graphitized products and the small-sized graphitized products are good.

[0033] See also Figure 1 as well as Figure 3, the graphitization furnace with carbon blocks provided in the embodiment of the present application includes a furnace body 100 and a carbon block 200. The furnace body 100 is provided with a receiving chamber 110 and a first electrode 300 and a second electrode 400 respectively located at both ends of the receiving chamber 110 along the current flow direction. The carbon block 200 is located in the receiving chamber 110, and the carbon block 200 is provided with a plurality of chambers 210 with openings for accommodating the first product to be graphitized 500, and the openings face the first electrode 300. In the current flow direction, the carbon block 200 is spaced from the first electrode 300 and / or the second electrode 400 to form a space for accommodating the second product to be graphitized 600, and the volume of the chamber 210 is smaller than the volume of the second product to be graphitized 600.

[0034] The containing chamber 110 of the furnace body 100 contains the carbon block 200 and the second product to be graphitized 600. The first electrode 300 is connected to an external power source to supply current into the containing chamber 110, and the second electrode 400 conducts the current.

[0035] The carbon block 200 has a plurality of chambers 210, and the chambers 210 have openings, so that the first product to be graphitized 500, i.e., a small-sized product to be graphitized, can be placed in the chambers 210. The carbon block 200 allows a plurality of small-sized first products to be graphitized 500 to be treated as a whole, and the cross-sectional area of ​​the carbon block 200 perpendicular to the current flow direction can be equivalent to the cross-sectional area corresponding to the large-sized product to be graphitized. The volume of the chamber 210 is smaller than the volume of the second product to be graphitized 600. The chamber 210 is used to accommodate the first product to be graphitized 500, so the volume of the first product to be graphitized 500 is smaller than the volume of the second product to be graphitized 600. The first product to be graphitized 500 is a small-sized product to be graphitized, and the second product to be graphitized 600 is a large-sized product to be graphitized.

[0036] Along the current flow direction, the carbon block 200 is spaced from the first electrode 300 and / or the second electrode 400 to form a space for accommodating the second product to be graphitized 600. That is to say, after the first product to be graphitized 500 and the second product to be graphitized 600 are placed in the accommodating cavity 110, the arrangement of each structure along the current flow direction may be the first electrode 300, the carbon block 200, the second product to be graphitized 600 and the second electrode 400, or the first electrode 300, the second product to be graphitized 600, the carbon block 200 and the second electrode 400, or the first electrode 300, the second product to be graphitized 600, the carbon block 200, the second product to be graphitized 600 and the second electrode 400.

[0037] Taking the carbon block 200 close to the second electrode 400 and the second product to be graphitized 600 close to the first electrode 300 as an example, the feeding process is introduced: first, multiple first products to be graphitized 500 are placed one by one in the multiple chambers 210 of the carbon block 200 through the openings, and then the carbon block 200 with the first product to be graphitized 500 is placed close to the second electrode 400, with the opening of the carbon block 200 facing the first electrode 300, and the two end faces of the first product to be graphitized 500 along the current flow direction are respectively flush with the bottom of the accommodating cavity 110 and the top surface of the carbon block 200, and then the second product to be graphitized 600 is placed in the accommodating cavity 110, and along the current flow direction, the second product to be graphitized 600 is arranged in contact with the top surface of the carbon block 200 and the first product to be graphitized 500 in the carbon block 200, and is also in contact with the first electrode 300. The carbon block 200 itself is a conductor. After power is applied, the current has two paths: one is the first electrode 300, the second product to be graphitized 600, the carbon block 200 and the second electrode 400, and the other is the first electrode 300, the second product to be graphitized 600, the first product to be graphitized 500, the cavity bottom of the carbon block 200 and the second electrode 400. Therefore, current will flow through the first product to be graphitized 500, thereby heating and increasing the temperature, thereby improving the graphitization effect of the first product to be graphitized 500.

[0038] In some embodiments, the multiple chambers 210 of the carbon block 200 have the same size. In other embodiments, the multiple chambers 210 of the carbon block 200 have different sizes to accommodate small-sized products to be graphitized of different specifications.

[0039] In some embodiments, see Figure 1 A plurality of carbon blocks 200 are provided, and the plurality of carbon blocks 200 are sequentially arranged along the current flow direction, and the plurality of carbon blocks 200 are spaced apart from the first electrode 300 and / or the second electrode 400 to form a space for accommodating the second product to be graphitized 600.

[0040] A plurality of carbon blocks 200 are provided, which can be used to produce more small-sized graphitized products. A plurality of carbon blocks 200 are provided, for example, two, three, four or other numbers are provided. In some embodiments, a plurality of carbon blocks 200 may be close to the first electrode 300, and the second product to be graphitized 600 is close to the second electrode 400. In other embodiments, a plurality of carbon blocks 200 are close to the second electrode 400, and the second product to be graphitized 600 is close to the first electrode 300. In certain embodiments, two second products to be graphitized 600 are provided, which are close to the first electrode 300 and the second electrode 400, respectively, and a plurality of carbon blocks 200 are located between the two second products to be graphitized 600. The number of carbon blocks 200 can be adjusted according to actual needs, without specific limitation.

[0041] In some embodiments, when a plurality of carbon blocks 200 are provided, two adjacent carbon blocks 200 are spaced apart to form a space for accommodating the second product to be graphitized 600 .

[0042] In some embodiments, see Figure 2 The cross-sectional area of ​​the chamber 210 of the carbon block 200 perpendicular to the current flow direction is larger than the cross-sectional area of ​​the first product to be graphitized 500 perpendicular to the current flow direction, so that a gap is set between the first product to be graphitized 500 and the side wall of the chamber 210, which is convenient for placing the first product to be graphitized 500 and demolding and taking it out after graphitization.

[0043] In some embodiments, the gap between the side wall of the chamber 210 and the first product to be graphitized 500 may be 5-10 mm.

[0044] In some embodiments, see Figure 2 The carbon block 200 includes a body 220 and a conductive block 230. The conductive block 230 is located at the opening. The body 220 and the conductive block 230 enclose a space for accommodating the first product to be graphitized 500. The two sides of the conductive block 230 along the current flow direction are the first side and the second side, respectively. The first side contacts the first product to be graphitized 500; the second side contacts the second product to be graphitized 600 or the first electrode 300. The size of the accommodating cavity 110 along the current flow direction is larger than the size of the first product to be graphitized 500. Then the conductive block 230 is placed at the opening. The current flows through the conductive block 230, the first product to be graphitized 500 and the cavity bottom of the carbon block 200. In some embodiments, the body 220 is made of carbon material and can conduct electricity. The conductive block 230 can be formed by mixing carbon paste, calcined coke and a binder. The height error is ±3 mm to ensure that the carbon block 200 is in good contact with the second product to be graphitized 600 or the electrode. The volatile matter of the conductive block 230 does not exceed 6% to reduce the generation of volatile gas during the graphitization process.

[0045] In some embodiments, the conductive block 230 may have a vertical dimension of 20-30 mm. In some embodiments, the conductive block 230 is flush with the side surface of the body 220 along the current flow direction to improve the conductive effect between the conductive block 230 and the first electrode 300 or the second product to be graphitized 600.

[0046] In some embodiments, the body 220 may be in the shape of a cuboid, a cylinder, or a cube.

[0047] In some embodiments, the projection of the first product to be graphitized 500 along the current flow direction falls within the first side surface, that is, the first side surface covers the first product to be graphitized 500, thereby improving the conductive effect. In some embodiments, the projection area of ​​the first product to be graphitized 500 along the current flow direction is exactly the same as that of the first side surface. In other embodiments, the projection area of ​​the first product to be graphitized 500 along the current flow direction is smaller than that of the first side surface.

[0048] In some embodiments, the shape of the chamber 210 is the same as the shape of the first product to be graphitized 500. In some embodiments, the shape of the first product to be graphitized 500 is cylindrical, and the shape of the chamber 210 is cylindrical. In some embodiments, the shape of the first product to be graphitized 500 is a cube, and the shape of the chamber 210 is a cube. In other embodiments, the shape of the first product to be graphitized 500 is a cuboid, and the shape of the chamber 210 is a cuboid.

[0049] The graphitization furnace can be a vertical graphitization furnace or a horizontal graphitization furnace. In some embodiments, when the graphitization furnace is a horizontal graphitization furnace, the current flow direction extends in the horizontal direction, and the furnace body 100 is provided with a plurality of accommodating cavities 110 and the same number of first electrodes 300 and second electrodes 400 as the accommodating cavities 110. The first electrodes 300 are installed one-to-one at the first end of the accommodating cavities 110 along the current flow direction, and the second electrodes 400 are installed one-to-one at the second end of the accommodating cavities 110 along the current flow direction; the number of carbon blocks 200 is the same as the number of accommodating cavities 110, and the carbon blocks 200 are arranged one-to-one in the accommodating cavities 110.

[0050] In some embodiments, the graphitization furnace includes a plurality of boxes, which can be arranged horizontally on the ground. The boxes are provided with a receiving chamber 110, which extends in the direction of current flow, that is, the receiving chamber 110 extends in the horizontal reverse direction. The plurality of boxes are arranged in sequence perpendicular to the direction of current flow, and the plurality of boxes form a furnace body 100. The first electrode 300 and the second electrode 400 are respectively installed on both sides of the box along the direction of current flow. The top of the box is uncovered to form a take-up port for convenient product taking. During the graphitization process, a heat-insulating material is laid on the surface of the carbon block 200 and the second product to be graphitized 600 to close the take-up port. After the graphitization is completed, the heat-insulating material is removed, and then the carbon block 200 and the second product to be graphitized 600 are taken out through the take-up port.

[0051] When the graphitization furnace is a vertical graphitization furnace, in some embodiments, the current flow direction extends in the vertical direction, the first electrode 300 is located at the top, the second electrode 400 is located at the bottom, and the opening of the carbon block 200 faces upward.

[0052] The graphitization process is described below by way of example in conjunction with the graphitization furnace provided in the previous embodiment:

[0053] Example 1

[0054] The graphitization furnace is an internal string graphitization treatment. The carbon block 200 is a rectangular parallelepiped. Six cylindrical chambers 210 are processed on the carbon block 200 using a processing device. The bottom diameter of each chamber 210 is 60mm and the height is 100mm. The shape of the carbon block to be graphitized is cylindrical, with a bottom diameter of 55mm and a height of 80mm. The six carbon blocks to be graphitized are placed one by one in the chamber 210 of the carbon block 200. The opening of the chamber 210 is sealed with carbon paste. The carbon paste is prepared by mixing calcined coke and a binder. The volatile matter of the carbon paste is ≤5%. After tamping, the surface of the carbon paste is consistent with the surface of the carbon block 200, and the flatness error is ±2mm. The large-sized products to be graphitized are the same size as the carbon block 200. The carbon blocks to be graphitized and the large-sized products to be graphitized are placed in the furnace for graphitization treatment, and the graphitization temperature reaches 3000℃.

[0055] Example 2

[0056] The graphitization furnace is an internal string graphitization treatment. The carbon block 200 is cylindrical. Four rectangular chambers 210 are processed on the carbon block 200 using a processing device. The bottom side length of each rectangular chamber 210 is 110mm and the height is 130mm. The carbon block to be graphitized is a cube with a side length of 100mm. Four carbon blocks to be graphitized are placed one by one in the chamber 210 of the carbon block 200. The opening of the chamber 210 is sealed with carbon paste. The carbon paste is prepared by mixing calcined coke and a binder. The volatile matter of the carbon paste is ≤6%. After tamping, the surface of the carbon paste is consistent with the surface of the adjustment block, and the flatness error is ±1mm. The large-sized products to be graphitized are the same size as the carbon block 200. The carbon blocks to be graphitized and the large-sized products to be graphitized are placed in the furnace for graphitization treatment, and the graphitization temperature reaches 2800℃.

[0057] Example 3

[0058] The graphitization furnace is an internal string graphitization treatment. The carbon block 200 is a rectangular parallelepiped. Three regular triangular prism chambers 210 are processed on the carbon block 200 using a processing device. The bottom triangle side length of each regular triangular prism chamber 210 is 125mm and the height is 150mm. The specifications of the carbon block to be graphitized are regular triangular prisms, with a bottom triangle side length of 120mm and a height of 120mm. The three carbon blocks to be graphitized are placed one by one in the chamber 210 of the carbon block 200. The opening of the chamber 210 is sealed by tamping with carbon paste. The carbon paste is prepared by mixing calcined coke and a binder. The volatile matter of the carbon paste is 4.5%. After tamping, the surface of the carbon paste is consistent with the surface of the adjustment block, and the flatness error is ±3mm. The large-sized products to be graphitized are the same size as the carbon block 200. The carbon blocks to be graphitized are graphitized together with the large-sized products to be graphitized, and the graphitization temperature reaches 2900℃.

[0059] The graphitization furnace provided in the embodiment of the present application is provided with a carbon block 200, and the chamber 210 of the carbon block 200 is used to accommodate small-sized products to be graphitized, and then cooperate with large-sized products to be graphitized along the direction of current flow, so that the current can flow through the small-sized products to be graphitized, thereby improving the heating of the small-sized products to be graphitized. The industrial graphitization furnace can be used to produce small-sized products to be graphitized, and the graphitization effect of the small-sized products to be graphitized can be improved, thereby providing technical support for the graphitization production of diversified carbon products and providing technical means for experimental research on graphitization of different carbon materials.

[0060] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A graphitization furnace having a carbon block, It is characterized in that include: A furnace body, provided with a containing cavity and a first electrode and a second electrode respectively located at two ends of the containing cavity along the current flow direction of the graphitization furnace; A carbon block is located in the containing cavity, wherein the carbon block is provided with a plurality of chambers for containing the first product to be graphitized, wherein the chambers have openings, and the openings face the first electrode; Wherein, along the current flow direction, the carbon block is spaced apart from the first electrode and / or the second electrode to form a space for accommodating the second product to be graphitized.

2. The graphitization furnace having a carbon block according to claim 1, It is characterized in that There are a plurality of carbon blocks, which are sequentially arranged along the current flow direction, and the plurality of carbon blocks are spaced apart from the first electrode and / or the second electrode to form a space for accommodating the second product to be graphitized.

3. The graphitization furnace having a carbon block according to claim 2, It is characterized in that Two adjacent carbon blocks are arranged at an interval to form a space for accommodating the second product to be graphitized.

4. The graphitization furnace having a carbon block according to any one of claims 1 to 3, It is characterized in that The cross-sectional area of ​​the chamber of the carbon block perpendicular to the current flow direction is greater than the cross-sectional area of ​​the first product to be graphitized perpendicular to the current flow direction.

5. The graphitization furnace having a carbon block according to claim 4, It is characterized in that The gap between the side wall of the chamber and the first product to be graphitized is 5-10 mm.

6. The graphitization furnace having a carbon block according to any one of claims 1 to 3, It is characterized in that The carbon block includes a body and a conductive block, wherein the conductive block is located at the opening, and the body and the conductive block together form a space for accommodating the first product to be graphitized. The two side surfaces of the conductive block along the current flow direction are respectively a first side surface and a second side surface, wherein the first side surface is in contact with the first product to be graphitized; and the second side surface is in contact with the second product to be graphitized or the first electrode.

7. The graphitization furnace having a carbon block according to claim 6, It is characterized in that The dimension of the conductive block along the current flow direction is 20-30 mm.

8. The graphitization furnace having a carbon block according to claim 6, It is characterized in that A projection of the first product to be graphitized along the current flow direction falls within the first side surface.

9. The graphitization furnace having a carbon block according to any one of claims 1 to 3, It is characterized in that The shape of the chamber is the same as that of the first product to be graphitized; the shape of the chamber is cylindrical, cubic or cuboid.

10. The graphitization furnace having a carbon block according to any one of claims 1 to 3, It is characterized in that The furnace body is provided with a plurality of accommodating cavities and the same number of first electrodes and second electrodes as the accommodating cavities, the first electrodes being installed one-to-one at the first ends of the accommodating cavities along the current flow direction, and the second electrodes being installed one-to-one at the second ends of the accommodating cavities along the current flow direction; The number of the carbon blocks is the same as the number of the accommodating cavities, and the carbon blocks are arranged in the accommodating cavities in a one-to-one correspondence.

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