Special graphite production powder mixing and batching device

Abstract

The utility model relates to the technical field of carbon product production technology provides a kind of powder mixing batching device for special graphite production, including screening machine, secondary powder bin, batching scale and mixer, the top of screening machine is provided with secondary powder bin, star unloader is arranged between screening machine and secondary powder bin, the bottom of screening machine is provided with bunker group one, bunker group two and bunker group three, the side of screening machine is provided with bunker group four, batching screw is arranged below bunker group one, bunker group two and bunker group three, the utility model is effectively screened to secondary powder by screening machine, different granularity material is separated and respectively stored in multiple bunker groups, then by batching device such as batching screw, batching scale, the accurate batching mixing operation of different granularity or volatile fraction powder can be realized. Strictly control the granularity, volatile fraction and other parameters of powder within the range of process requirement, provide standard-compliant raw material for subsequent loading forming, ensure the quality stability of special graphite production from source.

Description

Technical Field

[0001] This utility model relates to the field of carbon product manufacturing technology, and in particular to a powder mixing and batching device for the production of special graphite. Background Technology

[0002] The production process of specialty carbon graphite materials is relatively complex, typically including the following steps: Coke particles are ground into micron-sized fine powder using a grinding mill. After being formulated according to a specific recipe, the fine powder is mixed and preheated, then molten liquid asphalt is added and kneaded to form a paste. The kneaded paste is cooled to form paste blocks smaller than 10 cm in size. These blocks need to be ground again into fine powder of tens of microns, and then molded into green blanks using molding or isostatic pressing. The green blanks are then calcined to become specialty carbon materials, which are then impregnated, calcined again, and graphitized to finally form specialty graphite materials. The finer the coke powder particles and the more pores they have, the greater the amount of asphalt binder required, and the higher the performance of the final product.

[0003] In this process, the grinding of the paste is called secondary grinding, and the powder produced by secondary grinding is called secondary powder. After large particles are removed by sieving, the secondary powder is called pressed powder. The particle size distribution of the secondary powder and pressed powder is mainly affected by the secondary grinding mill. Its coarseness, coarse powder ratio, and fine powder ratio have a significant impact on the uniformity of pressed powder and the stability of the product. This utility model belongs to the field of special graphite material production and is applicable to the processing of special graphite, especially isotropic isostatic pressed graphite, such as the pressing and mixing of powders.

[0004] In existing technologies, the paste undergoes secondary grinding before being stored in a silo, followed by sieving and mixing. After mixing, it is loaded into ton bags, mobile silos, or fixed silos, and then directly fed into the mold sleeve. However, this technology has significant problems:

[0005] On the one hand, the volatile matter of the secondary powder is determined during the kneading process, and the secondary grinding process cannot change the volatile matter of the paste. Too high a volatile matter content will affect the process qualification rate, while too low a volatile matter content will affect the product performance. Only when the volatile matter content is appropriate can both be balanced.

[0006] On the other hand, the particle size of secondary powder is mainly affected by secondary grinding. Fluctuations in the kneading process will cause the paste to exhibit different characteristics during secondary grinding. Paste with good toughness is easy to be coarsely ground in secondary grinding, while paste with brittleness is easy to be finely ground in secondary grinding. If the secondary powder is too coarse, it will affect the product performance; if it is too fine, it will affect the process qualification rate. Only when the particle size range of secondary powder is appropriate can the process qualification rate and product performance be balanced. Utility Model Content

[0007] The purpose of this invention is to provide a powder mixing and batching device for the production of special graphite, thereby solving the above-mentioned problems.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a special graphite production powder mixing and batching device, including a screening machine, a secondary powder silo, a batching scale and a mixer. The secondary powder silo is arranged above the screening machine, and a star-shaped unloader is arranged between the screening machine and the secondary powder silo. The first, second and third silo groups are arranged below the screening machine, and the fourth silo group is arranged on one side of the screening machine. A batching screw is arranged below the first, second and third silo groups, a batching scale is arranged below the batching screw, and a mixer is arranged below the batching scale.

[0009] Preferably, the screening machine is connected to silo group one, silo group two, silo group three and silo group four respectively via chutes.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model provides a special graphite production powder mixing and batching device. It effectively sieves secondary powder using a screening machine, separating materials of different particle sizes and storing them separately in multiple silos. Then, with the aid of batching screws, batching scales, and other batching devices, it can achieve precise batching and mixing of powders of different particle sizes or volatile contents. By strictly controlling the particle size, volatile content, and other parameters of the powder within the required process range, it provides standard raw materials for subsequent loading and molding, ensuring the quality stability of special graphite production from the source.

[0012] 2. This utility model provides a special graphite production powder mixing and batching device. Multiple silos can be equipped with their own mixing devices to premix the powder, and after batching, powders with different parameters will enter the mixer for further mixing. The mixer has a suitable volume and multiple mixers can be set according to needs, which can fully stir the powder, greatly improve the uniformity of the powder, avoid quality problems in subsequent production caused by uneven material mixing, and optimize the raw material properties of the powder.

[0013] 3. This utility model provides a special graphite production powder mixing and batching device. The material on the screen in the silo group can be returned to the previous process for secondary grinding, realizing the recycling of materials and reducing raw material waste. At the same time, the parameters of each component of the device are adjustable, such as the feed rate and screen specifications, which can adapt to different production needs, improve the versatility of the equipment and the utilization rate of raw materials, thereby reducing production costs to a certain extent. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the batching device of this utility model.

[0015] The following are the labels in the diagram: 1. Screening machine; 11. Silo group one; 12. Silo group two; 13. Silo group three; 14. Silo group four; 2. Rotary rotary valve; 3. Secondary powder silo; 4. Batching scale; 5. Mixer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0018] Combination Figure 1 As shown, this utility model discloses a special graphite production powder mixing and batching device, including a screening machine 1, a secondary powder silo 3, a batching scale 4, and a mixer 5. The secondary powder silo 3 is arranged above the screening machine 1, and a star-shaped unloader 2 is arranged between the screening machine 1 and the secondary powder silo 3. The first silo group 11, the second silo group 12, and the third silo group 13 are arranged below the screening machine 1. The fourth silo group 14 is arranged on one side of the screening machine 1. A batching screw is arranged below the first silo group 11, the second silo group 12, and the third silo group 13. The batching scale 4 is arranged below the batching screw, and the mixer 5 is arranged below the batching scale 4.

[0019] The screening machine 1 is connected to silo group 11, silo group 2 12, silo group 3 13 and silo group 4 14 respectively via chutes.

[0020] Specifically,

[0021] There can be one or more secondary powder silos 3. The silos are equipped with a conveying device below them that can control the discharge size, including a star-shaped unloader 2, a vibrating feeder, a variable frequency screw conveyor, etc. The silo size is 1~30m³, and the feeding size is adjustable from 200~5000kg / h.

[0022] There are one or more screening machines, with screens of 200-20 mesh, which are replaceable, and the maximum screening capacity can reach 5000 kg / h;

[0023] It has multiple silo groups, each silo group has one or more silos, and the silo volume is 1~30m³;

[0024] The hopper can be equipped with a weighing sensor to easily confirm the weight of the pressed powder inside the hopper;

[0025] The hopper can be equipped with a mixing device for premixing the pressed powder;

[0026] The hopper is equipped with a feeding auger or a star-shaped unloader, etc., to adjust the discharge size.

[0027] The batching scale 4 has a measuring range of 0.2~5t and can be a fixed batching scale or a mobile batching scale;

[0028] Below the batching scale 4 are one or more mixers 5, with a mixer volume of 1~30m³; below the mixer 5 is an adjustable discharge device;

[0029] Equipped with a PLC automatic control system, it features one-button start / stop, automatic batching, and automatic calculation functions.

[0030] Working principle:

[0031] Secondary powder is conveyed to secondary powder silos 3 via chutes and pneumatic conveying devices. There may be one or more secondary powder silos 3. Below them, rotary valves 2, vibrating feeders, and variable frequency screw conveyors (with feed rates adjustable from 200 to 5000 kg / h) transport the secondary powder to screening machines 1. The rotation speed of the rotary valves 2 is controlled by a frequency converter, thereby adjusting the feed rate into screening machines 1. There may be one or more screening machines 1, equipped with replaceable screens of 200 to 20 mesh, with a maximum screening capacity of 5000 kg / h, effectively screening secondary powder.

[0032] After screening, the undersize material (qualified pressed powder) is conveyed to a group of silos via chutes. Each silo in these silos has a volume of 1-30 m³. Some silos are equipped with weighing sensors to confirm the weight of the pressed powder and can also have their own mixing devices for pre-mixing. The oversize material (large particles) is conveyed to silo group 4 via chutes, and its silos also have corresponding volume specifications and other characteristics. During the screening process, samples of the undersize material are periodically taken for particle size, volatile matter, and other tests to determine the parameters of the pressed powder in the silos.

[0033] The feed auger or star-shaped discharger 2 below the silo group, which can adjust the discharge size, is connected to a fixed or mobile feed scale 4 with a metering range of 0.2~5t. Based on the parameters of the pressed powder in the silo group, a suitable formula is selected for batching using a PLC automatic control system, so that pressed powder with different parameters enters one or more mixers 5 with a volume of 1~30m³.

[0034] Mixer 5 mixes the pressed powder to improve its uniformity. The mixed pressed powder is discharged through an adjustable discharge device located below mixer 5, which can be used for subsequent material filling and molding. The material on the screen in the silo group 4 can be returned to the previous process for secondary grinding through a corresponding device, realizing the recycling of materials.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special graphite production powder mixing and batching device, comprising a screening machine (1), a secondary powder silo (3), a batching scale (4), and a mixer (5), characterized in that: A secondary powder silo (3) is provided above the screening machine (1). A star-shaped unloader (2) is provided between the screening machine (1) and the secondary powder silo (3). A silo group one (11), a silo group two (12), and a silo group three (13) are provided below the screening machine (1). A silo group four (14) is provided on one side of the screening machine (1). A batching screw is provided below the silo group one (11), the silo group two (12), and the silo group three (13). A batching scale (4) is provided below the batching screw. A mixer (5) is provided below the batching scale (4).

2. The special graphite production powder mixing and batching device according to claim 1, characterized in that: The screening machine (1) is connected to the first silo group (11), the second silo group (12), the third silo group (13) and the fourth silo group (14) respectively via chutes.

Images