Method and system for heating carbon product kneading dry material by using waste heat of roasting furnace

Abstract

The invention provides a method and a system for heating a carbon product kneading dry material by using waste heat of a roasting furnace, and belongs to the technical field of carbon. The method comprises the following steps: collecting mixed high-temperature hot air generated in a cooling stage of a roasting furnace after roasting a carbon product; and heating the carbon product kneading dry material to a set temperature by taking the mixed high-temperature hot air as a heat source. By using the waste heat generated in the cooling area of the roasting furnace as a heat source to heat the kneading dry material, the method not only can effectively improve the heat energy utilization rate of the roasting furnace and fully utilize the waste heat of the roasting furnace, but also can reduce the natural gas consumption of the carbon dry material in the heating kneading forming process.

Description

Technical Field

[0001] The present application relates to the field of carbon technology, and in particular to a method and system for heating and kneading dry materials for carbon products by utilizing waste heat from a roasting furnace. Background Art

[0002] Carbon products mainly include prebaked anodes, graphitized cathodes, graphite cathodes, graphite electrodes, etc., and their production and preparation all need to go through the kneading, forming and roasting processes. Taking the production of prebaked anodes as an example, dry materials and binders of different particle sizes are kneaded under certain process conditions such as temperature. After they are evenly kneaded and the binder fully wraps the dry materials of each particle size, they enter the molding process. The prebaked anode green blocks prepared by molding enter the roasting process, and the anode cooked blocks roasted in the roasting furnace enter the subsequent production process. The production processes of graphitized cathodes, graphite cathodes and graphite electrodes are also roughly similar. In the production process of carbon products, the dry materials used need to be heated to above 100°C before entering the kneading process. The purpose is to allow the binder to more fully infiltrate and wrap the dry materials during the kneading process, so that the paste after kneading is more uniform. In the prior art, the heating process of mixing and kneading dry materials of carbon products mostly uses heat transfer oil heating, and heating the heat transfer oil consumes energy such as natural gas.

[0003] At the same time, the roasting furnace used in the roasting process of carbon products is mainly an open ring roasting furnace, which is convenient for production and maintenance, can realize the mechanization of roasting green blocks and filling materials out of the furnace, greatly reduces energy consumption, and is well managed for environmental protection. It has the advantages of large production capacity and good product quality. It has been widely used in the roasting process of carbon products in my country and has rich operating experience. The waste heat of the open ring roasting furnace is mainly the waste heat generated by the high-temperature carbon blocks, filling materials and furnace body in its cooling zone. If the waste heat in the cooling zone can be fully utilized, the thermal energy utilization rate of the roasting furnace can be effectively improved. Summary of the invention

[0004] The present application provides a method and system for heating carbon product mixing and kneading dry materials by utilizing the waste heat of a roasting furnace, so as to solve the following technical problem: how to improve the thermal energy utilization rate of the existing roasting furnace.

[0005] In a first aspect, an embodiment of the present application provides a method for heating a carbon product kneading dry material using waste heat from a roasting furnace, the method comprising:

[0006] Collect the mixed high-temperature hot air generated by the roasting furnace during the cooling stage after roasting carbon products;

[0007] The mixed high-temperature hot air is used as a heat source to heat the carbon product mixed dry material to a set temperature.

[0008] Optionally, the method of collecting the mixed high-temperature hot air generated by the roasting furnace during the cooling stage after roasting the carbon product comprises:

[0009] During the natural cooling stage of the roasting furnace after the carbon product is roasted, first high-temperature hot air is extracted from the high-temperature fire channel of the roasting furnace;

[0010] During the forced cooling stage of the roasting furnace, air is blown into the high-temperature fire channel of the roasting furnace to perform heat exchange, and the discharged second high-temperature hot air is collected;

[0011] The first high-temperature hot air and the second high-temperature hot air are mixed to obtain mixed high-temperature hot air.

[0012] Optionally, the temperature of the first high-temperature hot air is 400°C to 800°C.

[0013] Optionally, the temperature of the second high-temperature hot air is 100°C to 400°C.

[0014] Optionally, the temperature of the mixed high-temperature hot air is 270°C to 300°C.

[0015] Optionally, during the natural cooling stage, the temperature of the high temperature fire channel of the roasting furnace is ≥800°C;

[0016] During the forced cooling stage, the temperature of the high-temperature fire channel of the roasting furnace is less than 800°C.

[0017] Optionally, the set temperature is 100°C to 150°C.

[0018] Optionally, the flow rate of the mixed high-temperature hot air is determined according to the processing volume and heating temperature of the carbon product mixing and kneading dry materials.

[0019] In a second aspect, the present application provides a system for heating carbon products and kneading dry materials using waste heat from a roasting furnace, the system being adapted to the method described in any one of the embodiments of the first aspect, the system comprising:

[0020] A blower, used to blow air into the roasting furnace;

[0021] a roasting furnace, the roasting furnace being in communication with the blower;

[0022] a first high-temperature hot air pipeline, wherein the first high-temperature hot air pipeline is connected to the roasting furnace;

[0023] A high-temperature hot air mixing device, the high-temperature hot air mixing device is connected to the first high-temperature hot air duct and is used to mix and temporarily store the high-temperature hot air;

[0024] a second high-temperature hot air duct, the second high-temperature hot air duct being in communication with the high-temperature hot air mixing device;

[0025] A heating device is connected to the second high-temperature hot air duct and is used to heat the carbon product mixing dry material.

[0026] Optionally, the heating device is a rotary drum heating device or a fixed box heating device.

[0027] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0028] The embodiment of the present application provides a method for heating carbon product kneading dry materials using the waste heat of a roasting furnace, the method comprising: collecting the mixed high-temperature hot air generated by the roasting furnace in the cooling stage after roasting the carbon products; using the mixed high-temperature hot air as a heat source to heat the carbon product kneading dry materials to a set temperature. By using the waste heat generated in the cooling zone of the roasting furnace as a heat source to heat the kneading dry materials, the method can not only effectively improve the thermal energy utilization rate of the roasting furnace and make full use of the waste heat of the roasting furnace, but also reduce the natural gas consumption of the carbon dry materials in the heating and kneading molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 A first flow diagram of a method for heating carbon products and kneading dry materials using waste heat from a roasting furnace provided in an embodiment of the present application;

[0032] Figure 2 A second flow diagram of a method for heating carbon products and kneading dry materials using waste heat from a roasting furnace provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of a system for heating carbon products and kneading dry materials using waste heat from a roasting furnace provided in an embodiment of the present application;

[0034] Reference numerals:

[0035] 1-blower, 2-roasting furnace, 3-first high-temperature hot air pipeline, 4-high-temperature hot air mixing device, 5-second high-temperature hot air pipeline, 6-heating device. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution 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 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 this field without making creative work are within the scope of protection of this application.

[0037] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0038] In addition, in the description of the specification of the present application, the terms "including", "comprising", etc. mean "including but not limited to". In this article, relational terms such as "first" and "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this article, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A and B can be singular or plural. In this article, "at least one" means one or more, and "plurality" means two or more. "At least one", "the following at least one item (items)" or similar expressions refer to any combination of these items, including any combination of single items (items) or plural items (items). For example, "at least one of a, b, or c", or "at least one of a, b, and c", can all represent: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple. "Parts" such as parts by weight and parts by mass indicate the proportional relationship between the components. In the proportional relationship involved in this article, the parameters that need to be described by proportion should be understood as the first term of the proportional formula in the order of description, and the proportional numbers should be understood as the second term of the proportional formula. For example, the mass ratio of substance A, substance B, and substance C is 1:2:3, then substance A, substance B, and substance C should correspond one-to-one with the proportional numbers in the proportional formula in the order of description, that is, the mass of substance A: the mass of substance B: the mass of substance C = 1:2:3.

[0039] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0040] Figure 1 A first flow diagram of a method for heating carbon products and kneading dry materials using waste heat from a roasting furnace provided in an embodiment of the present application; Figure 2 A second flow chart of a method for heating and kneading dry materials of carbon products using waste heat from a roasting furnace provided in an embodiment of the present application.

[0041] like Figure 1 and Figure 2 As shown, the present application provides a method for heating and kneading dry materials of carbon products by utilizing waste heat from a roasting furnace.

[0042] The method comprises:

[0043] S1, collecting the mixed high-temperature hot air generated by the roasting furnace during the cooling stage after roasting carbon products;

[0044] S2. Using the mixed high-temperature hot air as a heat source, the carbon product mixed dry material is heated to a set temperature.

[0045] At present, most carbon roasting furnaces use open ring roasting furnaces. The waste heat mainly includes the waste heat generated by the high-temperature carbon blocks, fillers and furnace body in the cooling zone. The cooling process of the roasting furnace cooling zone is divided into two stages: natural cooling and forced cooling. In both stages, a large amount of heat is not fully utilized and diffused to the surrounding environment, accounting for about 8% of the heat expenditure of the roasting furnace. If this part of the heat can be effectively utilized, the thermal energy utilization rate of the roasting furnace can be effectively improved. Considering the overall process of carbon production, before the carbon dry material enters the kneading process, additional natural gas and other energy sources are required to heat the heat transfer oil, and the heated heat transfer oil is used to heat the carbon dry material to a suitable temperature to ensure the quality of the kneading process product, and the use of heat transfer oil also has certain safety hazards. If the waste heat of the roasting furnace can be used instead of heat transfer oil to heat the carbon dry material, it can not only improve the thermal energy utilization rate of the roasting furnace, but also reduce the consumption of natural gas and other energy sources in the kneading molding process, while reducing the use of heat transfer oil. Therefore, the embodiment of the present application proposes to use the high-temperature hot air generated in the two stages of the cooling process in the cooling zone of the roasting furnace as a heat source, heat the carbon dry material through a heating device, improve the safety index of carbon production, and achieve energy conservation and emission reduction.

[0046] In some embodiments, the method of collecting the mixed high-temperature hot air generated by the roasting furnace during the cooling stage after roasting the carbon product comprises:

[0047] S101, during the natural cooling stage of the roasting furnace after roasting the carbon product, extracting first high-temperature hot air from the high-temperature fire channel of the roasting furnace;

[0048] S102, during the forced cooling stage of the roasting furnace, blowing air into the high-temperature fire channel of the roasting furnace to perform heat exchange, and collecting the discharged second high-temperature hot air;

[0049] S103, mixing the first high-temperature hot air and the second high-temperature hot air to obtain mixed high-temperature hot air.

[0050] In the natural cooling stage of the cooling zone of the roasting furnace, the waste heat generated by the carbon blocks and the furnace body diffuses into the surrounding air, resulting in heat loss. In the forced cooling stage, air is blown into the fire channel for forced cooling, and the hot air generated by heat exchange is directly discharged, wasting a lot of heat. The present invention uses the high-temperature hot air generated by the waste heat in the cooling zone of the roasting furnace as a heat source to heat the dry materials used for kneading carbon products, which not only reduces the energy consumption of the kneading process, but also makes full use of the waste heat of the roasting furnace, thereby improving the thermal energy utilization rate of the roasting furnace.

[0051] In some embodiments, the temperature of the first high-temperature hot air is 400°C to 800°C.

[0052] The first high-temperature hot air has high thermal energy and can effectively carry the waste heat generated in the natural cooling stage of the roasting furnace. The waste heat is used to heat the carbon product mixing dry material, which can significantly improve the thermal energy utilization rate. Exemplarily, the temperature of the first high-temperature hot air can be 400°C, 450°C, 500°C, 550°C, 600°C, 650°C, 700°C, 750°C, 800°C, etc.

[0053] In some embodiments, the temperature of the second high-temperature hot air is 100°C to 400°C.

[0054] In the forced cooling stage, air is blown into the high-temperature fire channel of the roasting furnace for heat exchange. Although the temperature of the collected hot air is lower than that of the natural cooling stage, it still has a certain amount of thermal energy. Using this heat energy to heat the carbon dry material can further reduce energy consumption. Exemplarily, the temperature of the second high-temperature hot air can be 100°C, 150°C, 200°C, 250°C, 300°C, 350°C, 400°C, etc.

[0055] In some embodiments, the temperature of the mixed high-temperature hot air is 270°C to 300°C.

[0056] After the first high-temperature hot air and the second high-temperature hot air are mixed, the temperature of the mixed high-temperature hot air is moderate, neither too high to cause damage to the heating equipment or overheating of the dry material, nor too low to affect the heating efficiency. The hot air within this temperature range can heat the carbon product kneading dry material evenly and stably to ensure the product quality of the kneading process. Exemplarily, the temperature of the mixed high-temperature hot air can be 270°C, 280°C, 290°C, 295°C, 300°C, etc.

[0057] In some embodiments, during the natural cooling stage, the temperature of the high temperature fire channel of the roasting furnace is ≥ 800°C;

[0058] During the forced cooling stage, the temperature of the high-temperature fire channel of the roasting furnace is less than 800°C.

[0059] The temperature range division of these two stages helps to distinguish the different stages of roasting furnace cooling and take corresponding measures to collect and utilize waste heat. In the natural cooling stage, the temperature of the high-temperature fire channel is high and the waste heat content is rich; while in the forced cooling stage, although the temperature is lowered, a certain amount of heat energy can still be collected through heat exchange.

[0060] In some embodiments, the set temperature is 100°C to 150°C.

[0061] Limiting the target temperature of the carbon product kneading dry material heating to 100°C to 150°C can ensure the smooth progress of the kneading process and ensure the quality and performance of the product. By accurately controlling the heating temperature and heating time, the process parameters of the kneading process can be further optimized to improve production efficiency and product quality. Exemplarily, the heating temperature of the carbon product kneading dry material can be 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, etc.

[0062] In some embodiments, the flow rate of the mixed high-temperature hot air is determined according to the processing volume and heating temperature of the carbon product mixed dry material.

[0063] Reasonable hot air flow can ensure that the dry material is heated evenly and fully. When the dry material processing volume is large or the heating temperature is high, the hot air flow needs to be increased to improve the heating efficiency; conversely, when the dry material processing volume is small or the heating temperature is low, the hot air flow can be appropriately reduced to save energy. By accurately controlling the hot air flow, the goal of efficient use of thermal energy and energy conservation and emission reduction can be achieved.

[0064] In some embodiments, the furnace cooling zone includes, but is not limited to, heat generated by carbon blocks, fillers, and the furnace body.

[0065] In some embodiments, the carbon products include, but are not limited to, prebaked anodes, graphitized cathodes, graphite cathodes, graphite electrodes, and the like.

[0066] In some embodiments, the carbon product mixed dry materials include but are not limited to calcined petroleum coke, calcined anthracite, asphalt coke, graphite chips, etc. used in the production of carbon products.

[0067] In some embodiments, the carbon product mixed dry material is heated to a desired temperature and then enters a kneading process, where it is kneaded together with a binder at high temperature to prepare a carbon paste.

[0068] Figure 3 A schematic diagram of the structure of a system for heating and kneading dry materials for carbon products using waste heat from a roasting furnace provided in an embodiment of the present application.

[0069] like Figure 3 As shown, the present application provides a system for heating carbon products and kneading dry materials using waste heat from a roasting furnace, the system being adapted to the method described in any one of the embodiments of the first aspect, the system comprising:

[0070] A blower 1 is used to blow air into the roasting furnace 2;

[0071] A roasting furnace 2, wherein the roasting furnace 2 is connected to the blower 1;

[0072] a first high-temperature hot air pipeline 3, wherein the first high-temperature hot air pipeline 3 is connected to the roasting furnace 2;

[0073] A high-temperature hot air mixing device 4, the high-temperature hot air mixing device 4 is connected to the first high-temperature hot air duct 3, and is used for mixing and temporarily storing the high-temperature hot air;

[0074] a second high-temperature hot air duct 5, wherein the second high-temperature hot air duct 5 is connected to the high-temperature hot air mixing device 4;

[0075] The heating device 6 is connected to the second high-temperature hot air pipeline 5 and is used to heat the carbon product mixing dry material.

[0076] In some embodiments, the heating device is a rotary drum heating device or a fixed box heating device.

[0077] In some embodiments, the processing capacity of the heating device is 20 t / h to 50 t / h.

[0078] Taking a pre-baked anode carbon production plant with an annual production capacity of 200,000 tons as an example, through the technical solution of the embodiment of the present application, the high-temperature hot air generated by the waste heat in the cooling zone of the roasting furnace is used to replace the heat transfer oil to heat the calcined coke dry material, and the natural gas consumption in the kneading process can be reduced by 4Nm 3 / tC, the effective utilization rate of thermal energy in the roasting furnace is increased by more than 4%, which can save more than 3.2 million yuan in energy costs and reduce carbon emissions by more than 1.4 million tons each year. The production capacity of carbon products in China is about 30 million tons. If this patented technical solution is applied to carbon product manufacturers with a production capacity of 20 million tons nationwide, the production cost can be reduced by more than 300 million yuan each year, and carbon emissions can be reduced by more than 130 million tons, with significant benefits.

[0079] In summary, the method for heating carbon products and kneading dry materials using the waste heat of a roasting furnace provided in the embodiment of the present application has the following advantages:

[0080] (1) Improve the utilization rate of thermal energy: By collecting and utilizing the high-temperature hot air generated during the cooling stage of the roasting furnace, this method significantly improves the utilization rate of the thermal energy of the roasting furnace. This reduces the energy loss caused by the diffusion of waste heat to the surrounding environment, making the thermal energy more efficiently utilized.

[0081] (2) Reduce energy consumption: Using waste heat to heat the carbon product kneading dry materials reduces the consumption of natural gas and other energy sources in the kneading process. This not only reduces production costs, but also reduces dependence on traditional energy, which helps optimize the energy structure.

[0082] (3) Reduce the use of heat transfer oil and safety hazards: In the traditional process, heat transfer oil is needed to heat the carbon dry material, but the use of heat transfer oil has certain safety hazards. This method avoids the use of heat transfer oil, thereby improving the safety of production.

[0083] (4) Energy saving and emission reduction: By improving the utilization rate of thermal energy and reducing energy consumption, this method achieves significant energy saving and emission reduction effects. This helps to reduce carbon emissions.

[0084] (5) Significant economic benefits: Taking a prebaked anode carbon production plant with an annual production capacity of 200,000 tons as an example, this method can save more than millions of yuan in energy costs and reduce carbon emissions by more than tens of millions of tons each year. If it is promoted and applied in carbon product production enterprises across the country, the economic benefits will be even more significant.

[0085] (6) Strong adaptability: This method is suitable for different types of roasting furnaces and carbon product production processes, and has high flexibility and adaptability. By adjusting parameters such as hot air flow and heating temperature, different production needs can be met.

[0086] (7) Promote technological innovation: The implementation of this method has promoted technological innovation in carbon production processes and provided new ideas and solutions for energy conservation, emission reduction and sustainable development in the industry.

[0087] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are usually measured according to industry standards. If there is no corresponding industry standard, then the conditions recommended by the manufacturer are followed.

[0088] Example 1

[0089] After the calcined petroleum coke dry material used in the production of pre-baked anodes is mixed, it is added to the rotary drum heating equipment. The main body of the equipment is φ2000×4000mm. The processing capacity of the heating equipment is 50t / h. The hot air collected during the natural cooling and forced cooling stages in the cooling zone of the roasting furnace is mixed and introduced into the rotary drum heating equipment as a heat source. The flow rate of the mixed high-temperature hot air is about 2500m 3 / h, the temperature is about 300℃, the calcined petroleum coke dry material is heated to 110℃, discharged from the rotary drum heating equipment into the kneading pot to start preparing the paste, and the natural gas consumption in the kneading process is reduced by 5Nm 3 / tC, the effective utilization rate of thermal energy of the roasting furnace is increased by 5%.

[0090] Example 2

[0091] After the calcined petroleum coke dry material used in the production of graphitized cathode is mixed, it is added to the rotary drum heating equipment. The main body of the equipment is φ1500×2500mm. The processing capacity of the heating equipment is 40t / h. The hot air collected in the natural cooling and forced cooling stages of the roasting furnace cooling zone is mixed and introduced into the rotary drum heating equipment as a heat source. The flow rate of the mixed high-temperature hot air is about 2000m3 / h, the temperature is about 290℃, the calcined petroleum coke dry material is heated to 115℃, discharged from the rotary drum heating equipment into the kneading pot to start preparing the paste, and the natural gas consumption in the kneading process is reduced by 6Nm 3 / tC, the effective utilization rate of thermal energy of the roasting furnace is increased by 4%.

[0092] Example 3

[0093] After the calcined anthracite and graphite powder used in the production of graphite cathode are mixed, they are added to the fixed box heating equipment. The main body of the equipment is 1000×2000×1000mm. The processing capacity of the heating equipment is 35t / h. The hot air collected in the natural cooling and forced cooling stages of the roasting furnace cooling zone is mixed and introduced into the rotary drum heating equipment as a heat source. The flow rate of the mixed high-temperature hot air is about 1800m 3 / h, the temperature is about 290℃, after heating the calcined dry material to 115℃, it is discharged from the box-type heating equipment into the kneading pot to start preparing the paste, and the natural gas consumption in the kneading process is reduced by 6Nm 3 / tC, the effective utilization rate of thermal energy of the roasting furnace is increased by 4%.

[0094] Example 4

[0095] After the calcined petroleum coke and asphalt coke dry materials used in the production of graphite electrodes are mixed, they are added to the rotary drum heating equipment. The main body of the equipment is φ800×1500mm, and the processing capacity of the heating equipment is 20t / h. The hot air collected in the natural cooling and forced cooling stages of the roasting furnace cooling zone is mixed and introduced into the rotary drum heating equipment as a heat source. The flow rate of the mixed high-temperature hot air is about 1600m 3 / h, the temperature is about 270℃, the petroleum coke dry material is heated to 105℃, discharged from the rotary drum heating equipment into the kneading pot to start preparing the paste, and the natural gas consumption in the kneading process is reduced by 4Nm 3 / tC, the effective utilization rate of thermal energy of the roasting furnace is increased by 3%.

[0096] In addition, one or more technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0097] In the embodiment of the present application, the high-temperature hot air generated by the waste heat in the cooling zone of the roasting furnace is used as a heat source to heat the dry materials used for mixing and kneading carbon products. This not only reduces the energy consumption of the mixing and kneading process, but also makes full use of the waste heat of the roasting furnace, thereby increasing the thermal energy utilization rate of the roasting furnace by more than 3%.

[0098] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for heating a carbon product and kneading a dry material by utilizing the waste heat of a roasting furnace, the method comprising: Collect the mixed high-temperature hot air generated by the roasting furnace during the cooling stage after roasting carbon products; The mixed high-temperature hot air is used as a heat source to heat the carbon product mixed dry material to a set temperature.

2. The method according to claim 1, characterized in that: The method for collecting the mixed high-temperature hot air generated by the roasting furnace during the cooling stage after roasting the carbon products comprises: During the natural cooling stage of the roasting furnace after the carbon product is roasted, first high-temperature hot air is extracted from the high-temperature fire channel of the roasting furnace; During the forced cooling stage of the roasting furnace, air is blown into the high-temperature fire channel of the roasting furnace to perform heat exchange, and the discharged second high-temperature hot air is collected; The first high-temperature hot air and the second high-temperature hot air are mixed to obtain mixed high-temperature hot air.

3. The method according to claim 2, characterized in that The temperature of the first high-temperature hot air is 400°C to 800°C.

4. The method according to claim 2, characterized in that: The temperature of the second high-temperature hot air is 100°C to 400°C.

5. The method according to claim 2, characterized in that: The temperature of the mixed high-temperature hot air is 270°C to 300°C.

6. The method according to claim 2, characterized in that During the natural cooling stage, the temperature of the high temperature fire channel of the roasting furnace is ≥800°C; During the forced cooling stage, the temperature of the high-temperature fire channel of the roasting furnace is less than 800°C.

7. The method according to claim 1, characterized in that The set temperature is 100°C to 150°C.

8. The method according to claim 1, characterized in that The flow rate of the mixed high-temperature hot air is determined according to the processing volume and heating temperature of the carbon product mixed dry material.

9. A system for heating carbon products and kneading dry materials by using waste heat from a roasting furnace, the system being adapted to the method described in any one of claims 1 to 8, the system comprising: A blower (1) for blowing air into the roasting furnace (2); A roasting furnace (2), the roasting furnace (2) being in communication with the blower (1); A first high-temperature hot air pipeline (3), wherein the first high-temperature hot air pipeline (3) is connected to the roasting furnace (2); A high-temperature hot air mixing device (4), the high-temperature hot air mixing device (4) is connected to the first high-temperature hot air pipeline (3) and is used for mixing and temporarily storing the high-temperature hot air; A second high-temperature hot air pipeline (5), the second high-temperature hot air pipeline (5) being in communication with the high-temperature hot air mixing device (4); A heating device (6), the heating device (6) is connected to the second high-temperature hot air pipeline (5), and is used to heat the carbon product mixing dry material.

10. The system according to claim 9, characterized in that The heating device (6) is a rotary drum type heating device or a fixed box type heating device.

Images