Thermistor stirrer
By introducing a thermistor mixer during the thermistor processing process, using the agitator and iron remover to process the powder after the ball mill, the problems of powder layering and ball milling time are solved, and efficient stirring and iron removal are achieved, which improves the Production efficiency and product performance.
Patent Information
- Application Number
- CN202411298167.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2024-12-13
AI Technical Summary
During the existing thermistor processing, the powders of high Curie temperature products are easily delaminated due to gravity when mixing, resulting in performance impacts. The production cycle of the ball mill is long and the iron removal effect is poor.
Design a thermistor mixer, including a pumping device, iron remover, agitator and agitator. The mixer is composed of a motor, agitator shaft and agitator. The mixer shaft is connected to the motor. The inner wall of the mixing barrel is wrapped with ceramic or polyurethane material. The feed and discharge channels are set up, both passing through the iron detacher. The stirrer rotates at a speed of 20~100 revolutions and the working time is 1~10 hours. It is used for stirring and iron detachment of the mixed slurry after ball milling.
It effectively solves the problem of powder layering and ball milling too long, improves the stirring effect and production efficiency, significantly improves the iron removal effect, shortens the production cycle by half, and improves product performance.
Smart Images
Figure CN119113892A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of thermistor processing, and in particular to a thermistor mixer with good stirring effect, high production efficiency and good iron removal effect. Background Art
[0002] For thermistor products, especially those with high Curie temperature, it is necessary to add more than 15% molar fraction of lead element, because the density of lead is greater than that of other elements such as barium and titanium. In the process of standing and discharging after mixing, it is easy to cause stratification of materials due to gravity, which affects the performance of the product. At the same time, in order to achieve the purpose of uniform mixing, the powder mixing time is more than 20 hours, and the production cycle of the ball mill is long. In addition, the powder is mixed and ball-milled in the ball mill, which mainly has the functions of grinding the powder and mixing the materials evenly. It has been verified by experiments that the powder has been ground to the required particle size after 6 hours of ball milling in the ball mill. The particle size basically does not change much when it is ground further. The purpose of continuing ball milling is to mix the powder evenly. Therefore, in view of this situation, the present invention designs a thermistor mixer to address the current situation that the ball milling time in the thermistor processing process is too long. Summary of the invention
[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a thermistor mixer with good stirring effect, high production efficiency and good iron removal effect.
[0004] The technical solution of the present invention is: A thermistor stirrer is arranged in the rear end process of a ball mill in the thermistor processing process. The mixed slurry after ball milling enters the thermistor stirrer. The thermistor stirrer includes a pumping device, an iron remover, a stirring barrel and an agitator. The agitator includes a motor, a stirring shaft and a stirring paddle. The stirring shaft is connected to the motor, and the motor drives the stirring shaft to rotate. The stirring shaft and the stirring paddle extend into the stirring barrel. The stirring paddle is fixedly integrated with the stirring shaft, and the fixed combination position of the stirring paddle and the stirring shaft is an arc shape. The inner wall of the stirring barrel is wrapped with ceramic or polyurethane material, and the inner wall of the stirring barrel is provided with a baffle. The junction between the baffle and the inner wall of the stirring barrel is an arc shape. The thermistor stirrer includes a feeding channel and a discharging channel, and both the feeding channel and the discharging channel pass through the iron remover.
[0005] As a preferred technical solution, the background magnetic field of the iron remover is ≥18000GS and the production capacity is not less than 0.5t / h.
[0006] As a preferred technical solution, two groups of agitators are provided, and both groups of agitators include a motor, a stirring shaft and a stirring paddle.
[0007] As a preferred technical solution, the stirring paddle includes multiple groups of stirring impellers, and each group of stirring impellers includes multiple impeller blades.
[0008] As a further preferred technical solution, the impeller blades are made of stainless steel SUS304.
[0009] As a preferred technical solution, the agitator rotates at a speed of 20 to 100 revolutions per minute; and the agitator works for 1 to 10 hours each time.
[0010] As a preferred technical solution, the stirring mass of the stirring barrel is 120~3000 kg.
[0011] As a preferred technical solution, the mixing barrel further comprises a barrel cover, and a movable pulley is arranged above the barrel cover, and the movable pulley is used for hoisting the barrel cover and the agitator.
[0012] As a preferred technical solution, the feed channel includes a mixed slurry inlet, a pumping device, an iron remover and a mixing barrel inlet.
[0013] As a preferred technical solution, the discharge channel includes a mixing barrel discharge port, a pumping device, an iron remover and a mixed slurry outlet.
[0014] The thermistor mixer of the present invention is arranged in the rear end process of the ball mill in the thermistor processing process. After the ball mill grinds the raw materials, the mixed slurry is put into the thermistor mixer of the present invention, and after the iron is removed by the iron remover, it enters the stirring barrel for stirring. After stirring evenly, the material is discharged while stirring, and the material is also secondary iron removed by the iron remover when discharging. The thermistor mixer of the present invention solves the problems of stratification when discharging the slurry after ball milling, too long ball milling time and poor iron removal effect, and has the advantages of good stirring effect, high production efficiency and good iron removal effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a specific implementation scheme of a thermistor stirrer of the present invention. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0017] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.
[0018] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0019] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.
[0020] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.
[0021] like Figure 1 The figure shows a specific embodiment of a thermistor mixer of the present invention. The thermistor mixer of this embodiment is set in the back-end process of the ball mill in the thermistor processing process. The powder after ball milling enters the thermistor mixer of this embodiment for stirring. Iron removal is performed before and after stirring. The stirred slurry is filtered into a cake by a filter press. Figure 1As shown, a thermistor mixer of this embodiment includes a pumping device 9, an iron remover 11, a mixing barrel and an agitator. The agitator includes a motor 1, a mixing shaft 4 and a stirring paddle 5. The mixing shaft 4 is connected to the motor 1, and the motor 1 drives the mixing shaft 4 to rotate. The mixing shaft 4 and the stirring paddle 5 extend into the mixing barrel to stir the slurry. The stirring paddle 5 is fixedly integrated with the mixing shaft 4, and the position where the stirring paddle 5 is fixedly combined with the mixing shaft 4 is set to be an arc shape, which can effectively avoid the accumulation of slurry during the stirring process. The mixing barrel includes an inner wall 3 of the mixing barrel, and the inner wall 3 of the mixing barrel is wrapped with ceramic or polyurethane material, which can reduce the introduction of iron impurities and avoid product degradation. The inner wall 3 of the mixing barrel is also provided with a baffle 2, and the baffle 2 can be provided with multiple pieces. The junction between the baffle 2 and the inner wall 3 of the mixing barrel is an arc shape, which can avoid the accumulation of slurry at the junction between the baffle 2 and the inner wall 3 of the mixing barrel during the stirring process. A thermistor mixer of the present embodiment includes a feed channel and a discharge channel, wherein the feed channel includes a mixed slurry inlet 8, a pumping device 9, an iron remover slurry inlet 10, an iron remover 11, an iron remover slurry outlet 12 and a mixing barrel feed port 6; the discharge channel includes a mixing barrel outlet 7, a pumping device 9, an iron remover slurry inlet 10, an iron remover 11, an iron remover slurry outlet 12 and a mixed slurry outlet 13, wherein the mixed slurry outlet 13 is the inlet of a filter press after iron removal, so as to filter the slurry after ball milling into a cake. A thermistor mixer of the present embodiment is to pump out the ball-milled powder with a pump and then enter the feed channel, enter the mixing barrel through the iron remover to continuously stir and mix evenly, and can be discharged while stirring, and the iron is removed once more by the iron remover when discharging. The iron removal effect is doubled by adding the iron remover during both feeding and discharging, which can improve the appearance and resistance performance of the product. The thermistor stirrer of this embodiment solves the problems of stratification during discharge of raw slurry, too long ball milling time, and incomplete iron removal.
[0022] In order to ensure the iron removal effect of the iron remover, in a thermistor mixer of this embodiment, the background magnetic field of the iron remover is ≥18000GS, and the production capacity is not less than 0.5t / h.
[0023] In order to improve the stirring uniformity and stirring efficiency, in this embodiment, two groups of stirrers are provided, and both groups of stirrers include a motor, a stirring shaft and a stirring paddle. In addition, in order to further improve the stirring effect, the stirring paddle of a thermistor stirrer in this embodiment includes multiple groups of stirring impellers, and each group of stirring impellers includes multiple impeller blades; the impeller blades are made of stainless steel SUS304, which is wear-resistant and corrosion-resistant.
[0024] In specific operation, the agitator speed of the thermistor stirrer of this embodiment is 20 to 100 revolutions per minute; the stirrer works for 1 to 10 hours each time. The stirring mass of the stirring barrel is 120 to 3000 kg. The stirring speed and stirring time of the stirrer are related to the mass of the slurry in the stirring barrel. If the mass of the slurry is small, the stirrer speed is fast and the stirring time is short. If the mass of the slurry is large, the speed is slow and the stirring time is long.
[0025] In order to facilitate overall assembly, cleaning and maintenance, a thermistor mixer in this embodiment is further provided with a movable pulley 14 , and the mixing barrel includes a barrel cover, and the barrel cover and the mixer can be conveniently disassembled and assembled by the movable pulley 14 .
[0026] As shown in Table 1, in order to verify the technical effect of a thermistor mixer of this embodiment in the thermistor processing process, four thermistor formulas A, B, C, and D were used to produce and process thermistors using the new process after adding the mixer and the original process, and then the thermistors were tested for performance. After the test, it was found that the thermistors produced by the new mixer process adding a thermistor mixer of the present invention had a Curie temperature level comparable to the previous level, a resistivity lower than the previous level, a destruction voltage higher than the original process by more than 5%, and a significant reduction in the appearance of blue dots, indicating that the quality of the formula has improved after the iron removal effect has increased, achieving the expected effect. After using a thermistor mixer of the present invention, the production cycle of this section was shortened from the original 26 hours to 16 hours, and the production efficiency of the ball mill can be doubled.
[0027]
[0028] Table 1. Comparison of thermistor performance before and after adding the thermistor mixer of the present invention.
[0029] Therefore, the thermistor mixer of the present invention is arranged in the rear end process of the ball mill in the thermistor processing process. After the ball mill grinds the raw materials, the mixed slurry is put into the thermistor mixer of the present invention, and after the iron is removed by the iron remover, it enters the mixing barrel for stirring. After stirring evenly, the material is discharged while stirring. When discharging, the material is also deironed by the iron remover for secondary iron removal. The thermistor mixer of the present invention solves the problems of stratification when discharging the slurry after ball milling, too long ball milling time and poor iron removal effect, and has the advantages of good stirring effect, high production efficiency and good iron removal effect.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.
Claims
1. A thermistor mixer, characterized in that: It is arranged at the rear end process of the ball mill in the thermistor processing process. The mixed slurry after ball milling enters the thermistor mixer. The thermistor mixer includes a pumping device, an iron remover, a stirring barrel and an agitator. The agitator includes a motor, a stirring shaft and a stirring paddle. The stirring shaft is connected to the motor, and the motor drives the stirring shaft to rotate. The stirring shaft and the stirring paddle extend into the stirring barrel. The stirring paddle is fixedly integrated with the stirring shaft, and the fixed combination position of the stirring paddle and the stirring shaft is an arc shape. The inner wall of the stirring barrel is wrapped with ceramic or polyurethane material, and a baffle is arranged on the inner wall of the stirring barrel. The junction between the baffle and the inner wall of the stirring barrel is an arc shape. The thermistor mixer includes a feeding channel and a discharging channel, and both the feeding channel and the discharging channel pass through the iron remover.
2. A thermistor mixer according to claim 1, characterized in that: The background magnetic field of the iron remover is ≥18000GS, and the production capacity is not less than 0.5t / h.
3. A thermistor mixer according to claim 1, characterized in that: The stirrers are provided in two groups, and both groups of the stirrers include a motor, a stirring shaft and a stirring paddle.
4. A thermistor mixer according to claim 1, characterized in that: The stirring paddle includes a plurality of groups of stirring impellers, and each group of stirring impellers includes a plurality of impeller blades.
5. A thermistor mixer according to claim 4, characterized in that: The impeller blades are made of stainless steel SUS304.
6. The thermistor mixer according to claim 1, characterized in that: The stirrer has a rotation speed of 20 to 100 revolutions per minute; and the stirrer works for 1 to 10 hours each time.
7. The thermistor mixer according to claim 1, characterized in that: The mixing mass of the mixing barrel is 120-3000 kg.
8. The thermistor mixer according to claim 1, characterized in that: The mixing barrel further comprises a barrel cover, and a movable pulley is arranged above the barrel cover, and the movable pulley is used for hoisting the barrel cover and the agitator.
9. The thermistor mixer according to claim 1, characterized in that: The feed channel includes a mixed slurry inlet, a pumping device, an iron remover and a mixing barrel feed port.
10. The thermistor mixer according to claim 1, characterized in that: The discharge channel includes a mixing barrel discharge port, a pumping device, an iron remover and a mixed slurry outlet.