CN112844735A - Carbon black ultrafine grinding system and process - Google Patents
Carbon black ultrafine grinding system and process Download PDFInfo
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- CN112844735A CN112844735A CN202011553190.1A CN202011553190A CN112844735A CN 112844735 A CN112844735 A CN 112844735A CN 202011553190 A CN202011553190 A CN 202011553190A CN 112844735 A CN112844735 A CN 112844735A
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- carbon black
- impact mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
- B02C23/22—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating with recirculation of material to crushing or disintegrating zone
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Abstract
The invention discloses a carbon black ultrafine grinding system which comprises a classifier, a micron grinder and an impact mill, wherein the top and the bottom of the classifier are respectively provided with a qualified product outlet and a large particle outlet, and the qualified product outlet of the classifier is connected with a feed inlet of the micron grinder; the impact mill is composed of a crushing device and a grading device which are distributed up and down, and a feed inlet of the impact mill is connected with a large particle outlet of the grading machine; the discharge ports of the micron crusher and the impact mill are respectively connected with a material conveying pipeline, and a conveying fan is arranged on the material conveying pipeline. According to the invention, the classifier is additionally arranged in front of the micron pulverizer to perform two-stage classification on carbon black materials, so that the obtained carbon black can meet the requirement of 100% of sieving rate under the condition of 1200 meshes, can meet the use requirement under specific environments such as special tires and ultrahigh-voltage cables, the use cost of the carbon black is reduced, and the large-scale and industrialization of the production of the ultrafine carbon black is realized.
Description
Technical Field
The invention relates to the field, in particular to a system and a process for ultrafine crushing of carbon black.
Background
The carbon black screen residue index in the traditional carbon black production process is 325 meshes, at present, the production flow for solving the problem of screen residue is that a carbon black powdery finished product obtained from an upper flow filtration system is conveyed into a micron crusher through an air blower to be crushed so as to solve the problem that furnace burden and colloidal particles are mixed in carbon black in the production process of the carbon black, the part is the main screen residue in the production process of the carbon black and has overlarge particle size, the screen residue in the carbon black can reach the screen rate of more than 99 percent of 325 meshes through crushing by the micron crusher, but the carbon black cannot meet the use requirement under the specific environment, and particularly in special tires and ultrahigh-pressure cables, the carbon black cannot be used.
Disclosure of Invention
Aiming at the problems, the invention provides a system and a process for ultrafine crushing of carbon black, wherein screen residue in the carbon black can reach more than 1200 meshes in a factory environment, so that the application range of the carbon black is greatly expanded, and meanwhile, the use cost of the carbon black in a specific environment is reduced, so that the scale is realized.
The technical scheme of the invention is as follows:
a carbon black superfine grinding system comprises a classifier, a micron grinder and an impact mill, wherein the top and the bottom of the classifier are respectively provided with a qualified product outlet and a large particle outlet, and the qualified product outlet of the classifier is connected with a feed inlet of the micron grinder; the impact mill is composed of a crushing device and a grading device which are distributed up and down, and a feed inlet of the impact mill is connected with a large particle outlet of the grading machine; the discharge ports of the micron crusher and the impact mill are respectively connected with a material conveying pipeline, and a conveying fan is arranged on the material conveying pipeline.
The working principle of the technical scheme is as follows:
according to the invention, the classifier is additionally arranged in front of the micron pulverizer to perform two-stage classification on carbon black materials, so that the obtained carbon black can meet the requirement of 100% of sieving rate under the condition of 1200 meshes, can meet the use requirement under specific environments such as special tires and ultrahigh-voltage cables, the technical problems of limited use range and overhigh use cost of the carbon black obtained by the traditional carbon black treatment process are solved, and the scale and industrialization of the production of the ultrafine carbon black are realized.
In a further technical scheme, the material conveying pipelines on the discharge ports of the micron pulverizer and the impact mill are intersected at one position and then extend to a carbon black post-treatment system for uniform treatment.
In a further technical scheme, the particle size of the carbon black at the discharge hole of the micron pulverizer is 1200 meshes, and the screening rate is 100%.
In a further technical scheme, the particle size of the carbon black at the discharge hole of the impact mill is 1200 meshes, and the screening rate is 100%.
The invention also provides a carbon black ultrafine grinding process applying the system, and the technical scheme is as follows:
a carbon black ultrafine grinding process comprises the following steps:
s1, adding a grader in front of the micron pulverizer, and feeding carbon black into the grader from a carbon black feeding hole of the grader for first-stage grading;
s2, feeding the large-particle materials separated by the classifier into an impact mill through a conveying fan for secondary classification, and feeding qualified products into a micron crusher through the conveying fan for further crushing;
and S3, crushing the large-particle materials by using the impact mill, then feeding the large-particle materials into a grading system of the impact mill, converging the qualified products and the carbon black materials passing through the micron crusher, then conveying the carbon black materials to a carbon black post-treatment system, and repeatedly crushing the unqualified carbon black in the impact mill until the requirements are met.
In a further aspect, in step S1, the number of meshes of the carbon black is adjusted by the rotational speed of the classifier motor.
In a further technical scheme, in the step S2, the particle size of the carbon black after being further crushed in the micron crusher is 1200 meshes and the screening rate is 100%.
In a further technical scheme, in the step S3, the rotating speed of the impact mill classifier is adjusted to meet the requirement of 100% of the sieving rate of the carbon black under the condition of 1200 meshes.
The traditional production flow for solving the problem of screen residue in the carbon black production process is that a carbon black powder finished product obtained from an upper flow filtration system is conveyed into a micron crusher through a conveying fan to be crushed so as to solve the problem that furnace burden and colloidal particles are mixed in carbon black in the carbon black production process, the part is main screen residue in the carbon black production process and has overlarge particle size, the screen residue in the carbon black can reach a screen rate of more than 99 percent of 325 meshes by the traditional mode of crushing through the micron crusher, but the use requirement can not be met under a specific environment, particularly in special tires and ultrahigh-pressure cables, the carbon black can not be used, and the higher the screen rate of the carbon black is better theoretically. The invention provides a production process capable of realizing 100% sieving rate under 1200 mesh, which is characterized in that a grader is additionally arranged in front of a micron crusher of the traditional carbon black production equipment, the carbon black is subjected to first-stage grading, the sieving number of the carbon black can be adjusted according to the rotating speed of a motor of the grader so as to meet the requirements of different use occasions, the carbon black meeting the requirements enters the micron crusher to be crushed to meet the requirement of 100% sieving rate under 1200 mesh, meanwhile, large granular substances (including the carbon black) separated by the grader enter an impact mill through a conveying fan, the impact mill is composed of a crushing device and a grading device, the large granules are crushed through the impact mill and then enter a grading system carried by the impact mill, at the moment, the rotating speed of the impact mill grader is controlled so as to meet the requirement of 100% sieving rate of the carbon black under 1200 mesh, and the carbon black is crushed in the impact mill under the unsatisfied condition, until the requirements are met, the power and the rotating speed of the first-stage classifier, the power and the rotating speed of the impact mill with a classification system and the power and the rotating speed of the micron crusher are different according to different yields of carbon black, and detailed calculation is needed under specific productivity.
The invention has the beneficial effects that:
according to the invention, the classifier is additionally arranged in front of the micron pulverizer to perform two-stage classification on carbon black materials, so that the obtained carbon black can meet the requirement of 100% of sieving rate under the condition of 1200 meshes, can meet the use requirement under specific environments such as special tires and ultrahigh-voltage cables, the use cost of the carbon black is reduced, and the large-scale and industrialization of the production of the ultrafine carbon black is realized.
Drawings
Fig. 1 is a flow chart of a carbon black ultra-fine pulverizing system according to an embodiment of the present invention.
Description of reference numerals:
10. a classifier; 11. qualified products are exported; 12. a large particle outlet; 13. a carbon black feed port; 20. impact grinding; 30. a micron mill; 40. and a conveying fan.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example (b):
as shown in fig. 1, a carbon black ultra-fine grinding system comprises a classifier 10, a micron grinder 30 and an impact mill 20, wherein the top and the bottom of the classifier 10 are respectively provided with a qualified product outlet 11 and a large particle outlet 12, and the qualified product outlet 11 of the classifier 10 is connected with a feed inlet of the micron grinder 30; the impact mill 20 is composed of a crushing device and a grading device which are distributed up and down, and a feed inlet of the impact mill 20 is connected with a large particle outlet 12 of the grader 10; the discharge ports of the micron crusher 30 and the impact mill 20 are respectively connected with a material conveying pipeline, the material conveying pipeline is provided with a conveying fan 40, and the material conveying pipelines on the discharge ports of the micron crusher 30 and the impact mill 20 are intersected at one position and then extend to a carbon black post-treatment system for unified treatment.
In this example, the discharge port of the micron mill 30 had a particle size of the carbon black of 1200 mesh at a screening rate of 100%.
In this example, the particle size of the carbon black at the outlet of the impact mill 20 was 1200 mesh with a screen ratio of 100%.
The working principle of the technical scheme is as follows:
according to the invention, the classifier is additionally arranged in front of the micron pulverizer to perform two-stage classification on carbon black materials, so that the obtained carbon black can meet the requirement of 100% of sieving rate under the condition of 1200 meshes, can meet the use requirement under specific environments such as special tires and ultrahigh-voltage cables, the technical problems of limited use range and overhigh use cost of the carbon black obtained by the traditional carbon black treatment process are solved, and the scale and industrialization of the production of the ultrafine carbon black are realized.
The embodiment also provides a carbon black ultrafine grinding process applying the system, which comprises the following steps:
s1, adding a grader in front of the micron pulverizer, and feeding carbon black into the grader from a carbon black feeding hole of the grader for first-stage grading;
s2, feeding the large-particle materials separated by the classifier into an impact mill through a conveying fan for secondary classification, and feeding qualified products into a micron crusher through the conveying fan for further crushing;
and S3, crushing the large-particle materials by using the impact mill, then feeding the large-particle materials into a grading system of the impact mill, converging the qualified products and the carbon black materials passing through the micron crusher, then conveying the carbon black materials to a carbon black post-treatment system, and repeatedly crushing the unqualified carbon black in the impact mill until the requirements are met.
In this embodiment, in step S1, the number of meshes of carbon black is adjusted by the rotation speed of the classifier motor.
In step S2, the particle size of the carbon black after further pulverization in the micron pulverizer is 100% at a screen rate of 1200 mesh.
In step S3, the rotating speed of the impact mill classifier is adjusted to meet the requirement of 100% of the sieving rate of the carbon black under the condition of 1200 meshes.
The traditional production flow for solving the problem of screen residue in the carbon black production process is that a carbon black powder finished product obtained from an upper flow filtration system is conveyed into a micron crusher through a conveying fan to be crushed so as to solve the problem that furnace burden and colloidal particles are mixed in carbon black in the carbon black production process, the part is main screen residue in the carbon black production process and has overlarge particle size, the screen residue in the carbon black can reach a screen rate of more than 99 percent of 325 meshes by the traditional mode of crushing through the micron crusher, but the use requirement can not be met under a specific environment, particularly in special tires and ultrahigh-pressure cables, the carbon black can not be used, and the higher the screen rate of the carbon black is better theoretically. The invention provides a production process capable of realizing 100% sieving rate under 1200 mesh, which is characterized in that a grader is additionally arranged in front of a micron crusher of the traditional carbon black production equipment, the carbon black is subjected to first-stage grading, the sieving number of the carbon black can be adjusted according to the rotating speed of a motor of the grader so as to meet the requirements of different use occasions, the carbon black meeting the requirements enters the micron crusher to be crushed to meet the requirement of 100% sieving rate under 1200 mesh, meanwhile, large granular substances (including the carbon black) separated by the grader enter an impact mill through a conveying fan, the impact mill is composed of a crushing device and a grading device, the large granules are crushed through the impact mill and then enter a grading system carried by the impact mill, at the moment, the rotating speed of the impact mill grader is controlled so as to meet the requirement of 100% sieving rate of the carbon black under 1200 mesh, and the carbon black is crushed in the impact mill under the unsatisfied condition, until the requirements are met, the power and the rotating speed of the first-stage classifier, the power and the rotating speed of the impact mill with a classification system and the power and the rotating speed of the micron crusher are different according to different yields of carbon black, and detailed calculation is needed under specific productivity.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. A carbon black superfine grinding system is characterized by comprising a classifier, a micron grinder and an impact mill, wherein the top and the bottom of the classifier are respectively provided with a qualified product outlet and a large particle outlet, and the qualified product outlet of the classifier is connected with a feed inlet of the micron grinder; the impact mill is composed of a crushing device and a grading device which are distributed up and down, and a feed inlet of the impact mill is connected with a large particle outlet of the grading machine; the discharge ports of the micron crusher and the impact mill are respectively connected with a material conveying pipeline, and a conveying fan is arranged on the material conveying pipeline.
2. A carbon black ultra-fine pulverizing system as claimed in claim 1, wherein the delivery pipes of the discharge ports of the micron pulverizer and the impact mill are connected together and then extend to the carbon black post-treatment system.
3. A carbon black ultra-fine pulverizing system as set forth in claim 1, wherein the particle size of the carbon black at the outlet of said micron pulverizer is 1200 mesh sieve fraction 100%.
4. A carbon black ultra-fine pulverizing system as set forth in claim 1, wherein the discharge port of said impact mill has a particle size of 1200 mesh screen with a 100% screening rate.
5. A carbon black ultrafine grinding process is characterized by comprising the following steps:
s1, adding a grader in front of the micron pulverizer, and feeding carbon black into the grader from a carbon black feeding hole of the grader for first-stage grading;
s2, feeding the large-particle materials separated by the classifier into an impact mill through a conveying fan for secondary classification, and feeding qualified products into a micron crusher through the conveying fan for further crushing;
and S3, crushing the large-particle materials by using the impact mill, then feeding the large-particle materials into a grading system of the impact mill, converging the qualified products and the carbon black materials passing through the micron crusher, then conveying the carbon black materials to a carbon black post-treatment system, and repeatedly crushing the unqualified carbon black in the impact mill until the requirements are met.
6. A carbon black ultra-fine pulverizing process as claimed in claim 5, wherein in step S1, the number of the sieving meshes of the carbon black is adjusted by the rotation speed of the motor of the classifier.
7. A carbon black ultra-fine pulverizing process as claimed in claim 5, wherein in step S2, the particle size of the carbon black after further pulverizing in the micron pulverizer is 1200 mesh screen rate 100%.
8. A carbon black ultra-fine pulverizing process as claimed in claim 5, wherein in step S3, the rotation speed of impact mill classifier is adjusted to satisfy 100% of sieving rate of carbon black at 1200 mesh.
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Application publication date: 20210528 |