Continuous production device for high-purity graphite

Abstract

The utility model discloses a continuous production device for high-purity graphite, which comprises a reaction furnace, a reaction furnace cover is arranged on the reaction furnace, symmetrical cover buckles are arranged on the reaction furnace cover, and an air outlet is arranged on the reaction furnace cover. A transition cylinder is arranged below the reaction furnace and fixedly connected with the reaction furnace, a blocking device is arranged on the transition cylinder, an acid-base reaction box is arranged below the transition cylinder, a water guide pipeline is arranged on the side face of the acid-base reaction box and fixedly connected with the acid-base reaction box, and a water filtering device is arranged on one side of the water guide pipeline. Impurities such as silicate, aluminosilicate and quartz in graphite chemically react with sodium hydroxide at the high temperature of 500-700 DEG C to generate soluble sodium silicate or acid-soluble sodium aluminosilicate, and then the soluble sodium silicate or the acid-soluble sodium aluminosilicate is removed through water guide of a water storage tank and water washing so as to achieve the purpose of desiliconization.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous production devices, in particular to a continuous production device for high-purity graphite. Background Art

[0002] At present, high-purity graphite refers to graphite with a mass ratio content of more than 99.9%. It has the advantages of corrosion resistance, high temperature resistance, good electrical conductivity, thermal shock resistance, self-lubrication, and easy precision machining. It is an ideal inorganic non-metallic material. As an alternative material, it has a broad application space in high-tech and new technology fields. High-purity graphite crucibles, graphite electrodes, casting and sintering molds, fine-structured molded graphite, and pyrolytic graphite are produced from high-purity graphite. The methods for purifying natural graphite include: hydrofluoric acid purification method, chlorination roasting purification method, and high-temperature purification method. These methods all have problems such as high manufacturing cost and large labor intensity.

[0003] Secondly, in recent years, people have paid more attention to reducing pollution while producing high-purity graphite. The utility model uses the acid-base method to purify the graphite purity.

[0004] Therefore, we have designed a continuous production device for high-purity graphite. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems of the hydrofluoric acid purification method, chlorination roasting purification method, and high-temperature purification method, such as difficult treatment of waste water and tail gas and environmental pollution while reducing pollution during the production of high-purity graphite, and to provide a continuous production device for high-purity graphite.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A continuous production device for high-purity graphite includes a reaction furnace. A reaction furnace cover is provided on the reaction furnace. Symmetric cover buckles are provided on the reaction furnace cover. An air outlet is provided on the reaction furnace cover. A heating and roasting device is provided inside the reaction furnace cover. A transition cylinder is fixedly connected below the reaction furnace. A blocking device is provided on the transition cylinder. An acid-base reaction tank is provided below the transition cylinder. A water guiding pipe is fixedly connected to the side of the acid-base reaction tank. A water filtering device is provided on one side of the water guiding pipe. A support column is provided below the water filtering device. A plurality of support legs are provided below the acid-base reaction tank. A filter net opening is provided inside the acid-base reaction tank. A liquid injection port is provided on the acid-base reaction tank.

[0008] Preferably, the heating and roasting device includes a plurality of electrode conduits and conduit seats, and the plurality of electrode conduits are all fixed on the conduit seats.

[0009] Preferably, the blocking device includes a partition plate disk and a rotating shaft, and the partition plate disk is fixedly connected to the rotating shaft.

[0010] Preferably, the water filtration device includes a water storage tank and a water injection round opening, and a water guide port is provided on one side of the water storage tank.

[0011] Preferably, floor plates are provided at the grounding ends of the plurality of support legs, and a plurality of screw grooves are provided on the plurality of floor plates.

[0012] Preferably, a waste liquid discharge pipe is provided on one side of the acid-base reaction tank, and a filter screen is provided in the waste liquid discharge pipe.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, a heating and roasting device is provided inside the reaction furnace cover, a transition cylinder is fixedly connected below the reaction furnace, a blocking device is provided on the transition cylinder, an acid-base reaction tank is provided below the transition cylinder, a water guide pipe is fixedly connected to the side of the acid-base reaction tank, a water filtration device is provided on one side of the water guide pipe. The principle of purifying graphite by the alkali-acid method is to mix NaOH and graphite evenly in a certain proportion and calcine them in the reaction furnace. At a high temperature of 500 - 700 °C, impurities in graphite such as silicate, aluminosilicate, quartz, etc. react chemically with sodium hydroxide to form soluble sodium silicate or acid-soluble aluminosilicate, and then it is removed by water washing through the water guide of the water storage tank to achieve the purpose of desilication.

[0015] 2. In the present utility model, a waste liquid discharge pipe is provided on one side of the acid-base reaction tank, and a filter screen is provided in the waste liquid discharge pipe. Waste water and waste gas can be collected by the collection tank for centralized treatment. It avoids polluting the air and causing environmental pollution. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a continuous production device for high-purity graphite proposed by the present utility model;

[0017] Figure 2 It is a separated view of the reaction furnace cover of a continuous production device for high-purity graphite proposed by the present utility model;

[0018] Figure 3 It is a front sectional view of a continuous production device for high-purity graphite proposed by the present utility model;

[0019] Figure 4 It is a top view of a continuous production device for high-purity graphite proposed by the present utility model.

[0020] In the figure: 1, reaction furnace; 2, reaction furnace cover; 3, air outlet; 4, partition plate; 5, transition cylinder; 6, electrode conduit; 7, acid-base reaction tank; 8, liquid injection port; 9, waste liquid discharge pipe; 10, support leg; 11, filter screen port; 12, cover buckle; 13, screw groove; 14, floor plate; 15, water guide pipe; 16, water injection round opening; 17, water storage tank; 18, support column. Detailed implementation mode

[0021] Referring to Figures 1-4 As shown in the figure, a continuous production device for high-purity graphite includes a reaction furnace 1, which is a place for roasting and carrying out chemical reactions. A reaction furnace cover 2 is provided on the reaction furnace 1.

[0022] Referring to Figures 1-2 As shown in the figure, symmetric cover buckles 12 are provided on the reaction furnace cover 2. The cover buckles 12 can be used by a robotic arm to remove the reaction furnace cover 2. An air outlet 3 is provided on the reaction furnace cover 2, and the air outlet 3 can avoid high pressure. A heating and roasting device is provided inside the reaction furnace cover 2, and the heating and roasting device can heat and roast the inside of the furnace. A transition cylinder 5 is fixedly connected under the reaction furnace 1, and a blocking device is provided on the transition cylinder 5, and the blocking device can isolate the material.

[0023] A acid-base reaction tank 7 is provided under the transition cylinder 5. The acid-base reaction tank 7 can carry out acid leaching. A water guide pipe 15 is fixedly connected to the side of the acid-base reaction tank 7. A water filtration device is provided on one side of the water guide pipe 15, and the water filtration device can wash the material with water. A support column 18 is provided under the water filtration device. A plurality of support legs 10 are provided under the acid-base reaction tank 7, and the support legs 10 play a supporting role. A filter mesh opening 11 is provided inside the acid-base reaction tank 7. A liquid injection port 8 is provided on the acid-base reaction tank 7. Through the heating and roasting device provided inside the reaction furnace cover 2, a transition cylinder 5 is fixedly connected under the reaction furnace 1, a blocking device is provided on the transition cylinder 5, a acid-base reaction tank 7 is provided under the transition cylinder 5, a water guide pipe 15 is fixedly connected to the side of the acid-base reaction tank 7, and a water filtration device is provided on one side of the water guide pipe 15. The principle of purifying graphite by the alkali-acid method is to mix NaOH and graphite evenly in a certain proportion and calcine them in the reaction furnace 1. At a high temperature of 500-700 °C, impurities in the graphite such as silicate, aluminosilicate, quartz and other components react with sodium hydroxide to form soluble sodium silicate or acid-soluble aluminosilicate, and then it is removed by conducting water through the water storage tank 17 for washing to achieve the purpose of desilication.

[0024] Referring to Figures 3-4 As shown in the figure, the heating and roasting device includes a plurality of electrode conduits 6 and conduit seats, and the plurality of electrode conduits 6 are all fixed on the conduit seats. The blocking device includes a partition plate disc 4 and a rotating shaft, and the partition plate disc 4 is fixedly connected to the rotating shaft.

[0025] The water filtration device includes a water storage tank 17 and a water injection round opening 16. A water guide port is provided on one side of the water storage tank 17. A waste liquid discharge pipe 9 is provided on one side of the acid-base reaction tank 7, and a filter mesh is provided inside the waste liquid discharge pipe 9. Grounding ends of the plurality of support legs 10 are all provided with anchor plates 14, and a plurality of screw slots 13 are provided on the plurality of anchor plates 14. Waste water and waste gas can be collected by a collection box for centralized treatment. To avoid polluting the air and causing environmental pollution.

[0026] The working principle of the present utility model is as follows: First, put the materials into the reaction furnace 1, which is a place for roasting and generating chemical reactions. There is a reaction furnace cover 2 on the reaction furnace 1. There are symmetric cover buckles 12 on the reaction furnace cover 2, and the cover buckle 12 can be used by a robotic arm to remove the reaction furnace cover 2. There is an air outlet 3 on the reaction furnace cover 2, and the air outlet 3 can avoid high pressure. There is a heating and roasting device inside the reaction furnace cover 2. The reaction furnace 1 is fixedly connected to a transition cylinder 5 below. There is a blocking device on the transition cylinder 5. There is an acid-base reaction tank 7 below the transition cylinder 5. There is a water guiding pipe 15 fixedly connected to the side of the acid-base reaction tank 7. There is a water filtering device on one side of the water guiding pipe 15. The principle of purifying graphite by the alkali-acid method is to mix NaOH and graphite evenly in a certain proportion and calcine them in the reaction furnace 1. At a high temperature of 500-700 °C, impurities in graphite such as silicate, aluminosilicate, quartz and other components react chemically with sodium hydroxide to form soluble sodium silicate or acid-soluble sodium aluminosilicate, and then it is removed by guiding water through the water storage tank 17 for washing to achieve the purpose of desilication.

[0027] Then, another part of the impurities such as metal oxides, etc., still remain in the graphite after alkali fusion. The desilicated product is leached with acid in the acid-base reaction tank 7 to convert the metal oxides therein into soluble metal compounds. Impurities such as carbonates in the graphite and acid-soluble compounds formed during the alkali leaching process react with the acid and enter the liquid phase, and then are separated from the graphite through the filter mesh opening 11 and guiding water for washing through the water storage tank 17. Graphite has great chemical inertness and good stability. It is insoluble in organic solvents and inorganic solvents and does not react with alkaline solutions; except for strong oxidizing acids such as nitric acid and concentrated sulfuric acid, it does not react with many acids, especially it can withstand hydrofluoric acid, and below 6000 °C, it does not react with water and water vapor. Therefore, the properties of graphite remain unchanged during the purification process.

[0028] Finally, there is a waste liquid drain pipe 9 on one side of the acid-base reaction tank 7. There is a filter mesh inside the waste liquid drain pipe 9, and the waste water and waste gas can be collected through the collection box for centralized treatment. This can avoid polluting the air and causing environmental pollution.

[0029] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A continuous production device for high-purity graphite, comprising a reaction furnace (1), characterized in that: The reactor (1) is provided with a reactor cover (2), the reactor cover (2) is provided with symmetrical cover buckles (12), the reactor cover (2) is provided with an air outlet (3), a heating and roasting device is provided inside the reactor cover (2), a transition tube (5) is provided below the reactor (1) for fixed connection, a blocking device is provided on the transition tube (5), an acid-base reaction box (7) is provided below the transition tube (5), a water guide pipe (15) is provided on the side of the acid-base reaction box (7) for fixed connection, a water filter device is provided on one side of the water guide pipe (15), a support column (18) is provided below the water filter device, a plurality of support legs (10) are provided below the acid-base reaction box (7), a filter mesh port (11) is provided on the inner side of the acid-base reaction box (7), and a liquid injection port (8) is provided on the acid-base reaction box (7).

2. A continuous production device for high-purity graphite according to claim 1, characterized in that: The heating and baking device comprises a plurality of electrode catheters (6) and a catheter seat, and the plurality of electrode catheters (6) are all fixed on the catheter seat.

3. A continuous production device for high-purity graphite according to claim 1, characterized in that: The blocking device comprises a baffle plate (4) and a rotating shaft, and the baffle plate (4) is fixedly connected to the rotating shaft.

4. A continuous production device for high-purity graphite according to claim 1, characterized in that: The water filter device comprises a water storage tank (17) and a water injection circular port (16), and a water guide port is provided on one side of the water storage tank (17).

5. A continuous production device for high-purity graphite according to claim 1, characterized in that: A plurality of support legs (10) are provided with a grounding plate (14) at their grounding ends, and a plurality of screw slots (13) are provided on the plurality of grounding plates (14).

6. A continuous production device for high-purity graphite according to claim 1, characterized in that: A waste liquid discharge pipe (9) is provided on one side of the acid-base reaction box (7), and a filter screen is provided inside the waste liquid discharge pipe (9).

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