A dry preparation device and process for high-purity nano copper oxide

Abstract

The present invention discloses a dry preparation device and process for high-purity nano-copper oxide, which relates to the field of nano-copper oxide. It includes a control cabinet, a switch module and a chassis. A mounting frame is rotatably connected to the middle of the chassis, and a calcination mechanism is fixedly installed in the middle of the mounting frame, and a mass elimination mechanism is arranged inside the calcination mechanism. In the present invention, the rotation speed of the outer grinding ring is greater than that of the inner grinding ring, and there is a relative displacement difference between the two, so as to realize the grinding of the precursor. With the cooperation of the inner wide grinding teeth and the outer wide grinding teeth, primary grinding is carried out. With the cooperation of the inner narrow grinding teeth and the outer narrow grinding teeth, secondary grinding is carried out to eliminate the agglomeration phenomenon and particle non-uniformity existing in the precursor. While the two grindings are carried out, the precursor is calcined by the calcination mechanism at a high temperature, so that grinding and calcination are carried out synchronously, avoiding the need for secondary grinding after synthesizing nano-copper oxide powder by the traditional solid-phase reaction method, accelerating the preparation of nano-copper oxide powder and improving the preparation quality.

Description

Technical Field

[0001] The present invention relates to the technical field of nano-copper oxide, and specifically to a dry preparation device and process for high-purity nano-copper oxide. Background Technique

[0002] Nano-copper oxide is a black powder with small particle size, uniform particle size, and high activity. Compared with ordinary copper oxide, it has superior properties such as surface effect, quantum size effect, volume effect, and macroscopic quantum tunneling effect, and shows peculiar physical and chemical properties in terms of magnetism, light absorption, chemical activity, thermal resistance, catalyst, and melting point. Therefore, nano-copper oxide has attracted widespread attention; its preparation methods generally include solid-phase reaction method, precipitation method, hydrothermal method, etc. The preparation of nano-copper oxide by the solid-phase reaction method is also called dry preparation, which refers to a method of directly preparing nano-copper oxide powder by mixing metal salts or metal oxides in a certain proportion, grinding, and then calcining.

[0003] However, the existing method for synthesizing nano-copper oxide powder by the solid-phase reaction method is convenient to operate, has a simple process, high yield, and easy-to-control reaction conditions. The disadvantage is that the generated powder is prone to agglomeration, requires secondary pulverization and grinding, and is easy to introduce impurities. After the nano-copper oxide is prepared by using the existing calcination equipment and analyzed by a full-automatic X-ray diffractometer, it is found that there are agglomeration and uneven particle conditions, resulting in the actual effect of nano-copper oxide being lower than expected. Summary of the Invention

[0004] The purpose of the present invention is to provide a dry preparation device and process for high-purity nano-copper oxide to solve the problems of agglomeration and uneven particles existing after the nano-copper oxide is prepared by using the existing solid-phase reaction method and the existing calcination equipment as mentioned in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A dry preparation device for high-purity nano-copper oxide, including a control cabinet, a switch module, and a chassis. The middle part of the chassis is rotatably connected with a mounting frame, and a calcination mechanism is fixedly installed in the middle of the mounting frame. A deagglomeration mechanism is arranged inside the calcination mechanism;

[0006] The deagglomeration mechanism consists of a calcination tank, a conical bin, a double-rotation component, a reduction motor, an inner plate, a connecting rod, and a fine grinding component. The double-rotation component includes a housing, an input gear shaft, a first gear, a second gear, an output gear shaft, a sleeve shaft, and a seal. The input gear shaft and the first gear are coaxially installed. The input gear shaft meshes with the second gear. The first gear meshes with the output gear shaft. The shaft part of the output gear shaft is rotatably connected with the sleeve shaft through a bearing. The second gear is fixedly installed on the outer side of the lower end of the sleeve shaft. The calcination tank is fixedly connected to the outer side of the upper end of the sleeve shaft;

[0007] The fine grinding assembly is fixedly connected to the lower side of the conical bin, and the fine grinding assembly comprises an inner grinding ring, a short auger, an outer grinding ring, a mounting plate, a spring and a mounting seat. The outer grinding ring is located inside the inner grinding ring, and the inner wall of the inner grinding ring is provided with inner wide grinding teeth and inner narrow grinding teeth from top to bottom, and the outer side of the outer grinding ring is provided with outer wide grinding teeth and outer narrow grinding teeth from top to bottom. The short auger is fixedly installed on the upper side of the outer grinding ring, and the outer grinding ring is slidably clamped on the outer side of the shaft sleeve in the middle of the mounting plate, and the mounting plate is slidably clamped in the middle of the output gear shaft through a keyway, and the outer grinding ring and the mounting plate are fixedly connected by multiple groups of springs, and the mounting plate is rotatably connected to the inside of the mounting seat through a bearing.

[0008] Preferably, the mounting seat is fixedly connected to the inner wall of the calcining pot through multiple groups of connecting rods, the middle part of the mounting seat is rotatably connected to the output gear shaft, and the conical bin and the fine grinding assembly are located in the inner cavity of the calcining pot.

[0009] Preferably, the conical bin is installed through the upper side of the calcining pot, an outlet is opened on the upper side of the calcining pot, and a plurality of groups of the built-in plates are evenly fixedly connected to the inner wall of the calcining pot.

[0010] Preferably, the input gear shaft is rotatably connected to the housing via a bearing, one end of the output gear shaft is rotatably connected to the housing via a bearing, and the sleeve shaft is rotatably connected to the housing via a bearing.

[0011] Preferably, the calcining mechanism includes a tank shell, an insulation layer, an annular electric heating tube, a temperature control module and a tank cover, the annular electric heating tube is electrically connected to the temperature control module, the temperature control module is electrically connected to the switch module, the switch module is electrically connected to the control cabinet, and the calcining tank is fixedly connected to the inner wall of the tank shell.

[0012] Preferably, the housing is fixedly mounted on the bottom of the inner cavity of the tank shell, the input gear shaft penetrates to the outside of the tank shell, and is transmission-connected to the output end of the reduction motor through a coupling.

[0013] Preferably, the thermal insulation layer is fixedly connected to the inner wall of the tank shell, the annular electric heating tube is fixedly connected to the inner wall of the tank shell, and the annular electric heating tube is located in the middle of the thermal insulation layer and the calcining tank.

[0014] Preferably, the tank shell is fixedly mounted on the middle part of the upper side of the mounting frame, the reduction motor is fixedly connected to the middle part of the lower side of the mounting frame by bolts, the mounting frame is rotatably connected to the middle part of the base frame, one side of the mounting frame is fixedly connected to the output end of the stepper motor, and the stepper motor is fixedly mounted on the upper side of one end of the base frame.

[0015] A dry process for preparing high-purity nano copper oxide comprises the following steps:

[0016] Step 1: Preparing the precursor: Weigh 40% mol of analytically pure and After being fully mixed in an agate mortar, the mixture was ground until the reaction was complete, and the solid phase product was washed twice with water until it was neutral, washed with acetone, filtered, and dried in vacuum to obtain a precursor;

[0017] Step 2: The precursor is put into the high-purity nano copper oxide dry preparation device for calcination at 230°C for 2h to obtain nano copper oxide. Powder.

[0018] Preferably, the step 2 specifically includes the following steps:

[0019] The first step: putting the prepared forebody into a conical bin, and the temperature control module controls the annular electric heating tube to energize and heat it, thereby preheating it;

[0020] Step 2: Control the reduction motor to start, and after the short auger is rotated under force, the precursor inside the conical bin is transported to the gap between the inner grinding ring and the outer grinding ring. There is a relative displacement difference between the two. Under the cooperation of the inner wide grinding teeth and the outer wide grinding teeth, the precursor is ground once, and under the cooperation of the inner narrow grinding teeth and the outer narrow grinding teeth, the precursor is ground twice;

[0021] Step 3: The ground precursor falls into the inner cavity of the calcination tank and continues to be calcined. After calcination for 2 hours, it is led out from the opening of the calcination tank to obtain nanoparticles. Powder.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, in the initial state, the gap between the outer grinding ring and the inner grinding ring is very small. When the short auger rotates to feed downward, the precursor moves to the gap. After the outer grinding ring rotates inside the inner grinding ring, the outer grinding ring rotates faster than the inner grinding ring because the two are driven by the output gear shaft and the sleeve shaft with different rotation speeds. There is a relative displacement difference between the two, so the precursor is ground once with the cooperation of the inner wide grinding teeth and the outer wide grinding teeth, and the precursor is ground twice with the cooperation of the inner narrow grinding teeth and the outer narrow grinding teeth to eliminate the agglomeration phenomenon and the particle unevenness in the precursor. At the same time of the two grindings, the precursor is calcined by the calcination mechanism under high temperature, so that the grinding and calcination are carried out simultaneously, avoiding the step of secondary grinding required after the traditional solid phase reaction method for synthesizing nano copper oxide powder, and accelerating the nano Preparation of powders and improving preparation quality.

[0024] 2. In the present invention, after the reduction motor is started, its output end drives the input gear shaft to rotate. Since the input gear shaft and the first gear are coaxially installed, the input gear shaft and the first gear rotate synchronously. The linear velocity of the outermost side of the first gear is greater than that of the outermost side of the input gear shaft. The first gear meshes with the output gear shaft to rotate, the input gear shaft meshes with the second gear to rotate, and the second gear synchronously drives the sleeve shaft to rotate. The output gear shaft rotates in the inner cavity of the sleeve shaft through a bearing, and there is no interference between the two. Therefore, the linear velocity of the output gear shaft is greater than that of the sleeve shaft, that is, the rotational speed of the output gear shaft is greater than that of the sleeve shaft. While the two rotate in the same direction, there is a rotational speed difference between the two, resulting in the rotational speed of the outer grinding ring driven by the two being greater than that of the inner grinding ring, and there is a relative displacement difference between the two, realizing the cooperative grinding of the outer grinding ring and the inner grinding ring.

[0025] 3. In the present invention, the temperature control module controls the ring-shaped electric heating tube to be energized and generate heat. The ring-shaped electric heating tube is divided into upper and lower groups and surrounds the periphery of the calcination tank, so that the temperature in the space formed by the heat preservation layer and the calcination tank increases. The calcination tank is made of a metal with strong thermal conductivity, and the heat preservation layer is made of a heat preservation and heat insulation material to reduce the heat dissipation to the outside. The heat is conducted to the inner cavity of the calcination tank, so that the inner cavity reaches 230 °C, and the precursor is calcined comprehensively in the front and back stages of grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structure schematic diagram of a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0027] Figure 2 It is a three-dimensional structure schematic diagram of a part of a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0028] Figure 3 It is a three-dimensional structure schematic diagram of the inside of a calcination mechanism in a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0029] Figure 4 It is a three-dimensional structure schematic diagram of a part of a calcination mechanism in a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0030] Figure 5 It is a three-dimensional structure schematic diagram of the inside of a mass elimination mechanism in a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0031] Figure 6 It is a plan view of the inside of a mass elimination mechanism in a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0032] Figure 7 It is a three-dimensional structure schematic diagram of the positional relationship of a fine grinding assembly in a dry preparation device for high-purity nano-copper oxide according to the present invention;

[0033] Figure 8Schematic three-dimensional structure diagram of a partial double-rotation component in a dry-method preparation device for high-purity nano copper oxide according to the present invention;

[0034] Figure 9 Schematic three-dimensional structure diagram of the decomposition of a fine grinding component in a dry-method preparation device for high-purity nano copper oxide according to the present invention.

[0035] In the figure: 1, control cabinet; 2, switch module; 3, chassis; 4, mounting rack; 5, calcination mechanism; 51, tank shell; 52, thermal insulation layer; 53, annular electric heating tube; 54, temperature control module; 55, tank cover; 6, mass elimination mechanism; 61, calcination tank; 62, conical bin; 63, double-rotation component; 631, housing; 632, input gear shaft; 633, first gear; 634, second gear; 635, output gear shaft; 636, sleeve shaft; 637, seal; 64, reduction motor; 65, built-in plate; 66, connecting rod; 67, fine grinding component; 671, inner grinding ring; 672, inner wide grinding teeth; 673, inner narrow grinding teeth; 674, short auger; 675, outer grinding ring; 676, outer wide grinding teeth; 677, outer narrow grinding teeth; 678, mounting disc; 679, spring; 680, mounting seat; 7, stepping motor. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Example 1: Refer to Figures 1-9As shown: A dry preparation device for high-purity nano-copper oxide, including a control cabinet 1, a switch module 2 and a chassis 3. A mounting frame 4 is rotatably connected to the middle of the chassis 3. A calcination mechanism 5 is fixedly installed in the middle of the mounting frame 4. A mass elimination mechanism 6 is arranged inside the calcination mechanism 5. The mass elimination mechanism 6 is composed of a calcination tank 61, a conical bin 62, a double-rotation assembly 63, a reduction motor 64, an inner plate 65, a connecting rod 66 and a fine grinding assembly 67. The double-rotation assembly 63 includes a housing 631, an input gear shaft 632, a first gear 633, a second gear 634, an output gear shaft 635, a sleeve shaft 636 and a seal 637. The input gear shaft 632 and the first gear 633 are coaxially installed. The input gear shaft 632 meshes with the second gear 634. The first gear 633 meshes with the output gear shaft 635. The shaft part of the output gear shaft 635 is rotatably connected to the sleeve shaft 636 through a bearing. The second gear 634 is fixedly installed on the outer side of the lower end of the sleeve shaft 636. The calcination tank 61 is fixedly connected to the outer side of the upper end of the sleeve shaft 636. The fine grinding assembly 67 is fixedly connected to the lower side of the conical bin 62. The fine grinding assembly 67 includes an inner grinding ring 671, a short auger 674, an outer grinding ring 675, a mounting disc 678, a spring 679 and a mounting seat 680. The outer grinding ring 675 is located inside the inner grinding ring 671. The inner wall of the inner grinding ring 671 is successively provided with inner wide grinding teeth 672 and inner narrow grinding teeth 673 from top to bottom. The outer side of the outer grinding ring 675 is successively provided with outer wide grinding teeth 676 and outer narrow grinding teeth 677 from top to bottom. The short auger 674 is fixedly installed on the upper side of the outer grinding ring 675. The outer grinding ring 675 is slidably clamped on the outer side of the central sleeve of the mounting disc 678. The mounting disc 678 is slidably clamped on the middle of the shaft of the output gear shaft 635 through a keyway. The outer grinding ring 675 and the mounting disc 678 are fixedly connected by a plurality of groups of springs 679. The mounting disc 678 is rotatably connected inside the mounting seat 680 through a bearing. The mounting seat 680 is fixedly connected to the inner wall of the calcination tank 61 through a plurality of groups of connecting rods 66. The middle of the mounting seat 680 is rotatably connected to the output gear shaft 635. The conical bin 62 and the fine grinding assembly 67 are located inside the cavity of the calcination tank 61. The conical bin 62 is penetrated and installed on the upper side of the calcination tank 61. An outlet is provided on the upper side of the calcination tank 61. A plurality of groups of inner plates 65 are evenly fixedly connected to the inner wall of the calcination tank 61.

[0038] In this embodiment, the control deceleration motor 64 is started. After being transmitted by the double-rotation assembly 63, the output gear shaft 635 and the sleeve shaft 636 rotate in the same direction, but the rotational speed of the output gear shaft 635 is greater than that of the sleeve shaft 636. After the sleeve shaft 636 rotates, it drives the calcination tank 61 to rotate in the middle of the heat insulation layer 52, thereby driving the conical bin 62 and the inner grinding ring 671 to rotate; and the mounting seat 680 is fixed in the inner cavity of the calcination tank 61 by multiple connecting rods 66, so that the output gear shaft 635 drives the mounting disc 678 and the short auger 674 to rotate stably. After the short auger 674 rotates, it conveys the precursor inside the conical bin 62 downward. After the mounting disc 678 rotates, it drives the outer grinding ring 675 to rotate; and in the initial state, the outer grinding ring 675 is subjected to an upward elastic force applied by multiple springs 679 in a compressed state, so that the outer grinding ring 675 slides upward a small distance on the middle shaft surface of the mounting disc 678, so that the gap between the outer grinding ring 675 and the inner grinding ring 671 is very small. When the short auger 674 rotates and feeds downward, the precursor moves toward the gap. After the outer grinding ring 675 rotates inside the inner grinding ring 671, due to the fact that the two are respectively driven by the output gear shaft 635 and the sleeve shaft 636 with different rotational speeds, the rotational speed of the outer grinding ring 675 is greater than that of the inner grinding ring 671, and there is a relative displacement difference between the two, realizing the grinding of the precursor. Under the cooperation of the inner wide grinding teeth 672 and the outer wide grinding teeth 676, the precursor is ground once. Under the cooperation of the inner narrow grinding teeth 673 and the outer narrow grinding teeth 677, the precursor is ground twice, eliminating the agglomeration phenomenon and the particle unevenness phenomenon existing in the precursor. While the two grindings are carried out, the precursor is calcined by the calcination mechanism 5 at a high temperature state, so that the grinding and the calcination are carried out synchronously, avoiding the need for a secondary grinding step after synthesizing nano-copper oxide powder by the traditional solid-phase reaction method.

[0039] Embodiment 2: According to Figures 3-8 As shown, the agglomeration elimination mechanism 6 is composed of a calcination tank 61, a conical bin 62, a double-rotation assembly 63, a deceleration motor 64, an inner plate 65, a connecting rod 66 and a fine grinding assembly 67. The double-rotation assembly 63 includes a housing 631, an input gear shaft 632, a first gear 633, a second gear 634, an output gear shaft 635, a sleeve shaft 636 and a seal 637. The input gear shaft 632 and the first gear 633 are coaxially installed. The input gear shaft 632 meshes with the second gear 634. The first gear 633 meshes with the output gear shaft 635. The shaft part of the output gear shaft 635 is rotationally connected to the sleeve shaft 636 through a bearing. The second gear 634 is fixedly installed on the outer side of the lower end of the sleeve shaft 636. The calcination tank 61 is fixedly connected to the outer side of the upper end of the sleeve shaft 636. The input gear shaft 632 is rotationally connected to the housing 631 through a bearing. One end of the output gear shaft 635 is rotationally connected to the housing 631 through a bearing. The sleeve shaft 636 is rotationally connected to the housing 631 through a bearing.

[0040] In this embodiment, the deceleration motor 64 is controlled by the switch module 2. After the deceleration motor 64 starts, its output end drives the input gear shaft 632 to rotate. Since the input gear shaft 632 and the first gear 633 are coaxially installed, the input gear shaft 632 and the first gear 633 rotate synchronously. The outermost linear velocity of the first gear 633 is greater than the outermost linear velocity of the input gear shaft 632. The first gear 633 meshes with the output gear shaft 635 to rotate, the input gear shaft 632 meshes with the second gear 634 to rotate, and the second gear 634 synchronously drives the sleeve shaft 636 to rotate. The output gear shaft 635 rotates in the inner cavity of the sleeve shaft 636 through a bearing, and there is no interference between the two. Thus, the linear velocity of the output gear shaft 635 is greater than the linear velocity of the sleeve shaft 636, that is, the rotational speed of the output gear shaft 635 is greater than the rotational speed of the sleeve shaft 636. While the two rotate in the same direction, there is a rotational speed difference between the two, resulting in the rotational speed of the outer grinding ring 675 driven by the two being greater than the rotational speed of the inner grinding ring 671, and there is a relative displacement difference between the two, realizing the cooperative grinding of the outer grinding ring 675 and the inner grinding ring 671.

[0041] Embodiment 3: According to Figures 1-4 As shown in the figure, the calcination mechanism 5 includes a tank shell 51, a heat-insulating layer 52, a ring-shaped electric heating tube 53, a temperature control module 54 and a tank cover 55. The ring-shaped electric heating tube 53 is electrically connected to the temperature control module 54, the temperature control module 54 is electrically connected to the switch module 2, and the switch module 2 is electrically connected to the control cabinet 1. The calcination tank 61 is fixedly connected to the inner wall of the tank shell 51. The housing 631 is fixedly installed at the bottom of the inner cavity of the tank shell 51. The input gear shaft 632 penetrates to the outside of the tank shell 51 and is in transmission connection with the output end of the deceleration motor 64 through a coupling. The heat-insulating layer 52 is fixedly connected to the inner wall of the tank shell 51. The ring-shaped electric heating tube 53 is fixedly connected to the inner wall of the tank shell 51. The ring-shaped electric heating tube 53 is located in the middle position between the heat-insulating layer 52 and the calcination tank 61. The tank shell 51 is fixedly installed in the middle of the upper side of the mounting frame 4. The deceleration motor 64 is fixedly connected to the middle of the lower side of the mounting frame 4 through bolts. The mounting frame 4 is rotatably connected to the middle of the chassis 3. One side of the mounting frame 4 is fixedly connected to the output end of the stepping motor 7. The stepping motor 7 is fixedly installed on the upper side of one end of the chassis 3.

[0042] In this embodiment, after the prepared precursor is put into the conical bin 62, the tank cover 55 is closed. The temperature control module 54 is controlled to work through the switch module 2. The temperature control module 54 controls the ring-shaped electric heating tube 53 to energize and generate heat. The ring-shaped electric heating tube 53 is divided into upper and lower groups and surrounds the periphery of the calcination tank 61, so that the temperature in the space formed by the heat-insulating layer 52 and the calcination tank 61 increases. The calcination tank 61 is made of a metal with strong thermal conductivity, and the heat-insulating layer 52 is made of a heat-insulating material to reduce heat dissipation to the outside. The heat is conducted to the inner cavity of the calcination tank 61, so that the inner cavity reaches 230 °C, and the precursor is calcined comprehensively before and after grinding to obtain nano powder.

[0043] Usage method and working principle of the present device: When using this high-purity nano-copper oxide dry preparation device, the prepared precursor is put into the conical bin 62, and then the tank cover 55 is closed. The temperature control module 54 and the reduction motor 64 are controlled to work through the switch module 2; the temperature control module 54 controls the ring-shaped electric heating tube 53 to be energized and generate heat. The ring-shaped electric heating tube 53 is divided into upper and lower groups and surrounds the periphery of the calcination tank 61. The heat is conducted to the inner cavity of the calcination tank 61 for calcination;

[0044] After the reduction motor 64 is started, its output end drives the input gear shaft 632 to rotate. Since the input gear shaft 632 and the first gear 633 are coaxially installed, the input gear shaft 632 and the first gear 633 rotate synchronously. The outermost linear velocity of the first gear 633 is greater than the outermost linear velocity of the input gear shaft 632. The first gear 633 meshes with the output gear shaft 635 to rotate, and the input gear shaft 632 meshes with the second gear 634 to rotate. The second gear 634 synchronously drives the sleeve shaft 636 to rotate. The output gear shaft 635 rotates in the inner cavity of the sleeve shaft 636 through a bearing, and there is no interference between the two. Thus, the linear velocity of the output gear shaft 635 is greater than the linear velocity of the sleeve shaft 636, that is, the rotational speed of the output gear shaft 635 is greater than the rotational speed of the sleeve shaft 636;

[0045] Among them, after the sleeve shaft 636 rotates, it drives the calcination tank 61 to rotate in the middle of the heat preservation layer 52, thereby driving the conical bin 62 and the inner grinding ring 671 to rotate; the output gear shaft 635 drives the mounting disc 678 and the short auger 674 to rotate. After the short auger 674 rotates, it conveys the precursor inside the conical bin 62 downward. After the mounting disc 678 rotates, it drives the outer grinding ring 675 to rotate;

[0046] In the initial state, the outer grinding ring 675 is subjected to an upward elastic force applied by multiple groups of springs 679 in a compressed state, so that the outer grinding ring 675 slides upward a small distance on the middle shaft surface of the mounting disc 678, so that the gap between the outer grinding ring 675 and the inner grinding ring 671 is very small. When the short auger 674 rotates and feeds downward, the precursor moves toward the gap. After the outer grinding ring 675 rotates inside the inner grinding ring 671, since the two are respectively driven by the output gear shaft 635 and the sleeve shaft 636 with different rotational speeds, the rotational speed of the outer grinding ring 675 is greater than the rotational speed of the inner grinding ring 671, and there is a relative displacement difference between the two, realizing the grinding of the precursor. Under the cooperation of the inner wide grinding teeth 672 and the outer wide grinding teeth 676, the precursor is ground once. Under the cooperation of the inner narrow grinding teeth 673 and the outer narrow grinding teeth 677, the precursor is ground twice to eliminate the agglomeration phenomenon existing in the precursor. The ground precursor falls into the bottom of the inner cavity of the calcination tank 61 through the inclined surface of the mounting disc 678;

[0047] In the front and back stages of grinding, the precursor is calcined at a high temperature, so that grinding and calcination are carried out synchronously. After calcination at 230 °C for 2 h, nano- The powder is finally discharged, and the operation of the calcination mechanism 5 and the mass eliminating mechanism 6 is stopped. The stepping motor 7 is controlled to rotate, which drives the mounting frame 4 to rotate in the middle of the chassis 3, and the tank cover 55 is opened. The nano powder is discharged from the upper opening of the calcination tank 61.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-purity nano copper oxide dry process preparation device, comprising a control cabinet, a switch module and a chassis, characterized in that: The middle part of the base frame is rotatably connected with a mounting frame, the middle part of the mounting frame is fixedly mounted with a calcining mechanism, and the interior of the calcining mechanism is provided with a deagglomeration mechanism; The deagglomeration mechanism is composed of a calcining pot, a conical bin, a double-rotation assembly, a reduction motor, a built-in plate, a connecting rod and a fine grinding assembly. The double-rotation assembly includes a housing, an input gear shaft, a first gear, a second gear, an output gear shaft, a sleeve shaft and a seal. The input gear shaft is coaxially installed with the first gear, the input gear shaft is meshed with the second gear, the first gear is meshed with the output gear shaft, the output gear shaft is rotatably connected to the sleeve shaft through a bearing, the second gear is fixedly installed on the outer side of the lower end of the sleeve shaft, and the calcining pot is fixedly connected to the outer side of the upper end of the sleeve shaft; The fine grinding assembly is fixedly connected to the lower side of the conical bin, and the fine grinding assembly includes an inner grinding ring, a short auger, an outer grinding ring, a mounting plate, a spring and a mounting seat. The outer grinding ring is located inside the inner grinding ring, and the inner wall of the inner grinding ring is provided with inner wide grinding teeth and inner narrow grinding teeth from top to bottom, and the outer side of the outer grinding ring is provided with outer wide grinding teeth and outer narrow grinding teeth from top to bottom. The short auger is fixedly installed on the upper side of the outer grinding ring, and the outer grinding ring is slidably clamped on the outer side of the shaft sleeve in the middle of the mounting plate, and the mounting plate is slidably clamped on the middle part of the output gear shaft through a keyway, and the outer grinding ring and the mounting plate are fixedly connected by multiple sets of springs, and the mounting plate is rotatably connected to the inside of the mounting seat through a bearing; The calcining mechanism includes a tank shell, an insulation layer, an annular electric heating tube, a temperature control module and a tank cover. The annular electric heating tube is electrically connected to the temperature control module, the temperature control module is electrically connected to the switch module, the switch module is electrically connected to the control cabinet, and the calcining tank is fixedly connected to the inner wall of the tank shell.

2. The high-purity nano copper oxide dry process preparation device according to claim 1, characterized in that: The mounting seat is fixedly connected to the inner wall of the calcining pot through multiple groups of connecting rods, the middle part of the mounting seat is rotatably connected to the output gear shaft, and the conical bin and the fine grinding assembly are located in the inner cavity of the calcining pot.

3. A high-purity nano copper oxide dry preparation device according to claim 2, characterized in that: The conical bin is installed through the upper side of the calcining pot, an outlet is opened on the upper side of the calcining pot, and a plurality of groups of built-in plates are evenly fixedly connected to the inner wall of the calcining pot.

4. The high-purity nano copper oxide dry preparation device according to claim 2, characterized in that: The input gear shaft is rotatably connected to the housing via a bearing, one end of the output gear shaft is rotatably connected to the housing via a bearing, and the sleeve shaft is rotatably connected to the housing via a bearing.

5. The high-purity nano copper oxide dry preparation device according to claim 1, characterized in that: The housing is fixedly mounted on the bottom of the inner cavity of the tank shell, the input gear shaft penetrates to the outside of the tank shell, and is transmission-connected to the output end of the reduction motor through a coupling.

6. The high-purity nano copper oxide dry preparation device according to claim 5, characterized in that: The heat-insulating layer is fixedly connected to the inner wall of the tank shell, the annular electric heating tube is fixedly connected to the inner wall of the tank shell, and the annular electric heating tube is located in the middle of the heat-insulating layer and the calcining tank.

7. The high-purity nano copper oxide dry process preparation device according to claim 6, characterized in that: The tank shell is fixedly mounted on the middle part of the upper side of the mounting frame, the reduction motor is fixedly connected to the middle part of the lower side of the mounting frame by bolts, the mounting frame is rotatably connected to the middle part of the base frame, one side of the mounting frame is fixedly connected to the output end of the stepper motor, and the stepper motor is fixedly mounted on the upper side of one end of the base frame.

8. A dry process for preparing high-purity nano copper oxide, characterized in that: A high-purity nano copper oxide dry preparation device as described in any one of claims 1 to 7 is used, which comprises the following steps: S1. Preparation of precursor: weigh 40% mol of analytically pure and After being fully mixed in an agate mortar, the mixture was ground until the reaction was complete, and the solid phase product was washed twice with water until it was neutral, washed with acetone, filtered, and dried in vacuum to obtain a precursor; S2, the precursor is put into the high-purity nano copper oxide dry preparation device for calcination, and calcined at 230 ° C for 2 hours to obtain nano copper oxide. Powder.

9. A dry method for preparing high-purity nano copper oxide according to claim 8, characterized in that: The step S2 specifically includes the following steps: S21, putting the prepared forebody into a conical bin, and the temperature control module controls the annular electric heating tube to energize and heat it, so as to preheat it; S22, control the reduction motor to start, and after the short auger is rotated under force, the precursor inside the conical bin is transported to the gap between the inner grinding ring and the outer grinding ring. There is a relative displacement difference between the two. Under the cooperation of the inner wide grinding teeth and the outer wide grinding teeth, the precursor is ground once, and under the cooperation of the inner narrow grinding teeth and the outer narrow grinding teeth, the precursor is ground twice; S23, the ground precursor falls into the inner cavity of the calcination tank and continues to be calcined. After calcination for 2 hours, it is led out from the opening of the calcination tank to obtain nano Powder.

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