Process method for batching dust collection powder in carbon product production process

Abstract

A carbon product production process dust collection powder batching process belongs to the technical field of carbon product production, and comprises a powder grinding and feeding bin, the feed of the powder grinding and feeding bin comes from unbalanced materials in a crushing and screening process in the carbon product production, the discharge of the powder grinding and feeding bin enters quantitative feeding equipment, the discharge of the quantitative feeding equipment enters a powder grinding machine, and the powder grinding machine is connected with the powder grinding and feeding bin. Materials discharged from the flour mill enter a grader, graded large-granularity materials return to the flour mill through a feeder, and powder graded by the grader enters a bag type dust collector through a powder online detector; the powder with qualified purity is selected by the electric three-way valve to enter the powder proportioning bin or the purification powder bin, and the purification powder bin receives dust collection powder generated in each process of carbon product production at the same time. According to the invention, dust collection powder generated in the production process of carbon products can be accurately and stably blended.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon product production, and particularly relates to a process method for dust collection powder batching in the production process of carbon products. Background Art

[0002] Carbon dust collection powder is carbon dust particles suspended in the air and equipment collected by the ventilation dust collection system during the production of carbon products. The collection and reuse of the dust collection powder not only helps to improve the working conditions and prevent pollution, but also enables the comprehensive recovery and rational utilization of carbon raw materials.

[0003] At present, most of the dust collection powder in the carbon industry is collected and sent to the mill in the powder grinding system of the medium crushing and forming process. After air separation, it enters the powder batching bin to participate in dry material batching. Due to the lack of precise batching control during the feeding process of the dust collection powder, the amount of powder fed fluctuates greatly, resulting in unqualified physical and chemical indexes such as microcracks on the surface of carbon products, resistivity, and flexural strength. Summary of the Invention

[0004] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a process method for dust collection powder batching in the production process of carbon products, so as to achieve precise and stable batching of the dust collection powder generated during the production process of carbon products.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include: A process method for dust collection powder batching in the production process of carbon products, including a powder grinding feed bin. The feed of the powder grinding feed bin comes from the unbalanced material in the medium crushing and screening process of carbon product production. The discharge of the powder grinding feed bin enters the first feeding device, the discharge of the first feeding device enters the powder grinding machine, the discharge of the powder grinding machine enters the classifier, the large-particle-size materials after classification are returned to the powder grinding machine through the feeder, the powder after classification by the classifier enters the bag filter through the on-line powder detector, and the purified air meets the standard and is discharged into the atmosphere through the fan; the powder with qualified purity is selected by the electric three-way valve to enter the powder batching bin or the purified powder bin. The purified powder bin also receives the dust collection powder generated from each process of carbon product production. The powder in the powder batching bin is accurately metered by the powder batching scale and then conveyed to the preheating and kneading process of the carbon product production system. The purified powder in the purified powder bin is sent to the black method adsorption system through the second feeding device. After adsorption, the powder is sent to the black method adsorption powder batching bin and then accurately metered by the dust collection powder batching scale and conveyed to the collecting spiral or the collecting hopper.

[0006] Further, the material in the powder grinding feed bin is the calcined material with a particle size of 3-6 mm.

[0007] Further, the first quantitative feeding device is a quantitative feeder or a screw feeder.

[0008] Further, the powder grinding machine is a vertical mill, a roller mill or a ball mill.

[0009] Further, the purification powder bin receives the powder from the bag filter as a supplement.

[0010] Further, the second metering and feeding device is a metering feeder or a screw feeder.

[0011] Further, the powder batching scale and the dedusted powder batching scale can be a loss-in-weight scale, a rotor scale or a hopper scale.

[0012] Further, the collective screw or the collective hopper conveys the powder materials and granular materials with different particle size ratios to the equipment of the subsequent preheating and kneading process.

[0013] The beneficial effects of the present invention are as follows: the process method for dedusted powder batching in the production process of carbon products of the present invention realizes precise and stable batching of the dedusted powder generated in the production process of carbon products, effectively controls the Blaine value of the powder in the dry material batching and the stable blending ratio of the binder asphalt, and effectively solves the problem of unstable quality of carbon products; at the same time, after the dedusted powder is purified and adsorbed by the asphalt fume black method in the carbon product production system, the humidity of the powder becomes larger, which can effectively reduce the amount of the powder sucked away by the dust collection system in the subsequent process, reduce the ineffective circulation of materials, thereby saving raw material input and improving the enterprise benefit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic process flow diagram of dedusted powder batching in the production process of carbon products of the present invention.

[0015] In the figure: 1 is a grinding powder feeding bin, 2 is a first feeding device, 3 is a grinding mill, 4 is a classifier, 5 is a feeder, 6 is an on-line powder detector, 7 is a bag filter, 8 is a fan, 9 is an electric three-way valve, 10 is a powder batching bin, 11 is a powder batching scale, 12 is a purification powder bin, 13 is a second feeding device, 14 is a black method adsorption system, 15 is a black method adsorption powder batching bin, 16 is a dedusted powder batching scale, and 17 is a collective material conveying device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to better explain the present invention for easy understanding, the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments.

[0017] The present invention provides a process method for dedusted powder batching in the production process of carbon products, as Figure 1 shown, including a grinding powder feeding bin 1, a first feeding device 2, a grinding mill 3, a classifier 4, a feeder 5, an on-line powder detector 6, a bag filter 7, a fan 8, an electric three-way valve 9, a powder batching bin 10, a powder batching scale 11, a purification powder bin 12, a second feeding device 13, a black method adsorption system 14, a black method adsorption powder batching bin 15, a dedusted powder batching scale 16, and a collective material conveying device 17.

[0018] The feed of the powder grinding feed bin 1 is the unbalanced material from the medium crushing and screening process in carbon product production. Specifically, the powder grinding feed bin 1 stores the unbalanced material from the medium crushing and screening process in carbon product production, and the unbalanced material is the calcined material with a size of 3 - 6 mm. The discharge of the powder grinding feed bin 1 enters the first feeding device 2. The first feeding device 2 is a metering feeding device, which can specifically be a metering feeder or a screw feeder. Its function is to send the material into the powder grinding machine 3 and can achieve metering adjustment. The discharge of the metering first feeding device 2 enters the powder grinding machine 3. The powder grinding machine 3 can be a vertical mill, a roller mill or a ball mill, and its function is to grind the material into powder. The discharge of the powder grinding machine 3 enters the classifier 4. After the classifier 4 dynamically sorts the ground material, the large particle material is returned to the powder grinding machine 3 for re-grinding through the feeder 5; the powder with qualified purity monitored online by the powder online detector 6 is transported to the bag filter 7 under negative pressure, and the purified air meets the standards and is discharged into the atmosphere through the fan 8. The opening degree of the classifier 4 is adjusted by online monitoring the powder purity through the powder online monitor 6 installed on the pipeline between the classifier 4 and the bag filter 7. The positive pressure generated at the air outlet of the fan 8 discharges the purified air of the system into the atmosphere through the air duct.

[0019] The classifier 4 is arranged in front of the bag filter 7, and its function is to send the qualified material ground by the powder grinding machine 4 to the bag filter 7, and the unqualified material is returned to the powder grinding machine 4 for re-grinding through the feeding device 5. A feeding device 5 is arranged behind the classifier 4. The feeder 5 can be a star feeder or an impact plate flowmeter, and its function is to adjust the material flow rate of the metering feeder or the screw feeder 2 through the metering of the feeding device 5. The bag filter 7 is arranged in front of the fan 8, and its function is to filter out the finished material and purify the air of the system. The fan 8 is arranged behind the bag filter 7, and its function is to generate negative pressure at the front end, so that the material ground by the powder grinding machine 3 enters the bag filter 7 through the classifier 4, and generate positive pressure at the rear end, and discharge the purified air into the atmosphere through the outlet air duct.

[0020] The qualified powder is selected by the electric three-way valve 9 to enter the powder batching bin 10 or the purified powder bin 12. The purified powder bin 12 simultaneously receives the dust collected from each process of carbon product production. The powder in the powder batching bin 10 is accurately metered by the powder batching scale 11 and then transported to the preheating and kneading process of the carbon product production system. The purified powder in the purified powder bin 12 is sent to the black method adsorption system 14 by the second feeding device 13. The electric three-way valve 9 can switch the filtered qualified powder to the powder batching bin 10 or the purified powder bin 12. The purified powder bin 12 mainly receives the dust collected during the production of carbon products. The powder from the bag filter 7 can be used as a supplement when the amount of dust collected is insufficient to meet the requirements of the black method adsorption system 14. The second feeding device 13 meters the dust and feeds it to the black method adsorption system 14, where it fully reacts with the asphalt fumes generated during the kneading, cooling, and forming processes of carbon product production and is then transported to the black method adsorption powder batching bin 15. The black method adsorption system 14 is used to treat the asphalt fumes generated during the kneading, cooling, and forming processes of carbon products. After adsorption, the powder is sent to the black method adsorption powder batching bin 15, accurately metered by the dust collected powder batching scale 16, and then transported to the collecting screw or collecting hopper 17. Specifically, the powder batching scale 11 and the dust collected powder batching scale 16 are respectively arranged at the bottom of the powder batching bin 10 and the black method adsorption powder batching bin 15. After the materials are accurately proportioned according to the formula, they are transported to the collecting screw or collecting hopper 17 and different-sized granular materials are transported to the preheating and kneading process. The powder, dust collected powder, various granular aggregates, and binder asphalt enter the subsequent production process after reasonable process proportioning. The powder batching scale 11 and the dust collected powder batching scale 16 can be loss-in-weight scales, rotor scales, or hopper scales. The electric control equipment in the whole process is connected to the existing control system to achieve automatic control.

[0021] Specifically, the on-line powder detector 6 is arranged on the air duct between the classifier 4 and the bag filter 7, and its function is to on-line monitor the purity of the powder to adjust the opening degree of the classifier 4. The electric three-way valve 9 is arranged below the bag filter 7, and its function is to send the finished product powder filtered by the bag filter 7 to the powder batching bin 10 or the purified powder bin 12 respectively. The purified powder bin 12 receives the dust collected during the production process of carbon products, and the powder from the bag filter 7 can be used as a supplement. The quantitative second feeding device 13 is a belt feeder or a screw feeder, and its function is to feed the material to the black method adsorption system 14. The function of the black method adsorption system 14 is to treat the asphalt fume generated during the kneading, cooling and forming processes in the production process of carbon products. The dust collected powder batching bin 15 stores the dust collected powder after being treated by the black method adsorption system. The powder batching scale 11 and the dust collected powder batching scale 16 accurately measure the materials according to the formula and then convey them to the collecting screw or the collecting hopper 17. The collecting screw or the collecting hopper 17 is a device that conveys powders and granular materials with different particle size ratios to the subsequent preheating and kneading process. The dust collected powder batching process method can be applied to carbon product production lines such as continuous kneading or intermittent kneading.

[0022] The present invention can effectively solve the problem of unstable quality of carbon products; at the same time, after the dust collected powder is purified and adsorbed by the black method of asphalt fume in the carbon product production system, the humidity of the powder becomes larger, which can effectively reduce the amount of powder sucked by the dust collection system in the subsequent process, reduce the ineffective circulation of materials, thereby saving raw material input and improving the enterprise efficiency.

[0023] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modification, alteration, substitution or variation made by those of ordinary skill in the art to the above embodiments shall fall within the scope of the present invention.

Claims

1. A process for preparing dust powder for a carbon product production process, characterized by: The invention comprises a grinding feed bin (1), wherein the feed of the grinding feed bin (1) is unbalanced material from the crushing and screening process in the production of carbon products, the discharge of the grinding feed bin (1) enters a first feeding device (2), the discharge of the first feeding device (2) enters a grinding mill (3), the discharge of the grinding mill (3) enters a classifier (4), the classified large-particle material returns to the grinding mill (3) via a feeder (5), the powder classified by the classifier (4) enters a bag dust collector (7) via a powder online detector (6), and the purified air that meets the standard is discharged into the atmosphere via a fan (8); the powder with qualified purity is discharged via an electric three-way The valve (9) selects to enter the powder batching bin (10) or the purification powder bin (12). The purification powder bin (12) simultaneously receives dust powder generated from various processes of carbon product production. The powder in the powder batching bin (10) is accurately measured by the powder batching scale (11) and then transported to the preheating and kneading process of the carbon product production system. The purified powder in the purification powder bin (12) is sent to the black method adsorption system (14) through the second feeding device (13). After adsorption, the powder is sent to the black method adsorption powder batching bin (15) and then accurately measured by the dust powder batching scale (16) and then transported to the collecting screw or collecting hopper (17).

2. A dust collecting powder batching system for carbon product production process according to claim 1, characterized in that: The material in the grinding feed bin (1) is a calcined material with a particle size of 3-6 mm.

3. A dust collecting powder batching system for carbon product production process according to claim 1, characterized in that: The first quantitative feeding device (2) is a quantitative feeder or a screw feeder.

4. A dust collecting powder batching system for carbon product production process according to claim 1, characterized in that: The grinding mill (3) is a vertical mill, a roller mill or a ball mill.

5. A dust collecting powder batching system for carbon product production process according to claim 1, characterized in that: The purified powder bin (12) receives powder from the bag filter (7) as a supplement.

6. A dust collecting powder batching system for carbon product production process according to claim 1, characterized in that: The dust collecting powder batching scale (16) is a loss-in-weight scale, a rotor scale or a hopper scale.

7. A dust collecting powder batching system for carbon product production process according to claim 1, characterized in that: The collecting screw or collecting hopper (17) conveys powders and granular materials with different particle size ratios to the equipment of the subsequent preheating and kneading process.

Images