Aluminum silver paste gas shielded ball mill system

Abstract

The invention discloses an aluminum-silver paste gas-protected ball milling system, comprising a raw material supply part, a symmetrical ball milling part, a gas protection part, a material screening part, an oil recovery part and an oil circuit cooling part, wherein the raw material supply part comprises a raw material tank, a mixing barrel and a cold oil storage tank, wherein the mixing barrel is respectively connected with the raw material tank and the cold oil storage tank, wherein the mixing barrel mixes aluminum powder and kerosene and conveys the mixture to the symmetrical ball milling part, wherein the symmetrical ball milling part comprises at least two mutually independent ball mills, and wherein the gas protection part comprises a gas storage tank, wherein the gas storage tank is connected with the symmetrical ball milling part and fills the symmetrical ball milling part with protective gas.

Description

Technical Field

[0001] The invention relates to the preparation of metallic pigments, in particular to an aluminum-silver paste gas-protected ball milling system. Background Art

[0002] Aluminum silver paste is a type of metallic pigment, which can be divided into two categories: leafing and non-leafing. Leafing silver paste floats on the surface of the coating due to its low surface tension, and has extremely high reflectivity and chrome-plating effect, but aluminum flakes are easy to fall off the surface of the paint film, making recoating difficult. It is used in anti-corrosion, roofing, tanks and other occasions; non-leafing silver paste can be completely wetted by the paint, evenly distributed in the entire paint film, and has a tendency to sink. The coating film is solid and stable, and can be recoated and varnished. It is widely used in various occasions such as transportation vehicles, furniture, electronic products, and coils.

[0003] In the prior art, a Chinese invention patent with authorization announcement number "CN207042639U" discloses a continuous production system of aluminum-silver paste, which uses a ball mill to mill the aluminum-silver paste and then packages it through a vibrating screen. However, the aluminum-silver paste production efficiency of this production system is low. At the same time, the aluminum-silver paste is easily oxidized during the production process, and the recovery rate of kerosene is not high. Summary of the invention

[0004] The purpose of the present invention is to provide an aluminum-silver paste gas-protected ball milling system, which has the advantages of high production efficiency, low oxidation degree of the aluminum-silver paste, and recovery of waste oil.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: an aluminum-silver paste gas-protected ball milling system, comprising a raw material supply section, a symmetrical ball milling section, a gas protection section, a material screening section, an oil recovery section and an oil circuit cooling section, the raw material supply section comprising a raw material tank, a mixing barrel and a cold oil storage tank, the mixing barrel being connected to the raw material tank and the cold oil storage tank respectively, the mixing barrel mixing aluminum powder and kerosene and conveying them to the symmetrical ball milling section, the symmetrical ball milling section comprising at least two independent ball mills, the gas protection section comprising a gas storage tank, the gas storage tank being connected to the symmetrical ball milling section, and filling the symmetrical ball milling section with protective gas.

[0006] Preferably, the symmetrical ball milling section includes a first rotating device, a second rotating device, a first ball mill and a second ball mill, the first ball mill and the second ball mill both include a feed shaft, a discharge shaft and a bearing seat, the bearing seats are rotatably connected to the feed shaft and the discharge shaft, the first ball mill and the second ball mill are rotationally symmetrically arranged, the first rotating device drives the first ball mill to rotate, the second rotating device drives the second ball mill to rotate, the first rotating device and the second rotating device are rotationally symmetrically arranged, the first rotating device is arranged on the side of the first ball mill, and the second rotating device is arranged on the side of the second ball mill.

[0007] By adopting the above technical solution, during the production and preparation process of aluminum-silver paste, it is necessary to pass through a ball mill for more than 10 hours, and then the aluminum-silver paste after ball milling needs to go through multiple process flows such as filter pressing and screening. During the ball milling process, other process steps need to wait for the aluminum-silver paste after ball milling. Therefore, by setting the first ball mill and the second ball mill, the ball milling processes of the two are staggered, so that one ball mill can be used for ball milling and the other ball mill can be used for unloading, thereby improving production efficiency. At the same time, the first ball mill and the second ball mill arranged in rotational symmetry save more space inside the factory building, and when both are working, the vibration of the frame is effectively reduced.

[0008] Preferably, the first rotating device includes a first rotating motor, a first gearbox, a first driving belt and a first synchronous belt, the first driving belt is arranged between the first rotating motor and the first gearbox, and the first synchronous belt is arranged between the first gearbox and the first ball mill.

[0009] By adopting the above technical solution, the first rotating motor drives the first gearbox to rotate through the first driving belt, and the first gearbox drives the first ball mill to rotate through the first synchronous belt, thereby realizing the rotation of the first ball mill.

[0010] Preferably, the second rotating device includes a second rotating motor, a second gearbox, a second drive belt and a second synchronous belt, the second drive belt is arranged between the second rotating motor and the second gearbox, and the second synchronous belt is arranged between the second gearbox and the second ball mill.

[0011] By adopting the above technical solution, the second rotating motor drives the second gearbox to rotate through the second driving belt, and the second gearbox drives the second ball mill to rotate through the second synchronous belt, thereby realizing the rotation of the second ball mill.

[0012] Preferably, the first synchronous belt includes a driving pulley and a driven pulley, the driving pulley is arranged on the first rotating motor, and the driven pulley is sleeved on the outer circumference of the first ball mill.

[0013] By adopting the above technical solution, through the mutual cooperation between the driving pulley and the first synchronous belt, when the driving pulley rotates, the driven pulley is driven to rotate through the first synchronous belt. Since the driven pulley is sleeved outside the first ball mill, when the driven pulley rotates, the first ball mill rotates.

[0014] Preferably, a first base is provided on the frame, and the first base is respectively arranged at the bottom of the first ball mill and the second ball mill.

[0015] By adopting the above technical solution, the first base plays a role in supporting the first ball mill and the second ball mill.

[0016] Preferably, the first base comprises a reinforcement plate arranged on the frame, the reinforcement plate extends in a horizontal direction, and the bearing seat is arranged on the reinforcement plate.

[0017] By adopting the above technical solution, the reinforcement plate improves the supporting strength of the bearing seat.

[0018] Preferably, a second base is provided on the frame, and the second base is respectively arranged at the bottom of the first rotating device and the second rotating device.

[0019] By adopting the above technical solution, the second base plays a role in supporting the first rotating device and the second rotating device, and at the same time facilitates the positioning of the first rotating device and the second rotating device.

[0020] Preferably, the second base includes a reinforcing rod and a reinforcing plate, the reinforcing rod is arranged on the frame, two reinforcing rods are arranged in parallel, the reinforcing plate is arranged on the reinforcing rod, and the first rotating motor and the first gearbox are arranged on the reinforcing plate.

[0021] By adopting the above technical solution, the reinforcing rod plays a role in supporting the reinforcing plate, and the reinforcing rod and the reinforcing plate simultaneously play a role in positioning the first rotating device and the second rotating device.

[0022] Preferably, the raw material supply unit also includes a feeding rack, the raw material tank is provided on the upper part of the feeding rack, the mixing barrel is provided on the lower part of the feeding rack, the top of the raw material tank is provided with a cover body, the top of the mixing barrel is provided with a feeding hole and an oiling hole, the bottom of the raw material tank is provided with a spiral feeding pipe connected with the feeding hole, the bottom of the mixing barrel is provided with a discharge pipe, the top of the mixing barrel is provided with a mixer, and the mixer is provided with a mixing rod extending into the mixing barrel.

[0023] By adopting the above technical scheme, the raw material tank is arranged on the upper part of the feed rack, and the mixing barrel is arranged on the lower part of the feed rack, and then the raw material tank and the mixing barrel are arranged on the same feed rack, so the space utilization rate is high. At the same time, the setting of this structure, under the action of gravity, facilitates the raw materials to fall into the mixing barrel through the spiral feed pipe, reduces the length and structure of the raw material transportation, and simplifies the structure.

[0024] Preferably, the bottom of the raw material tank is conical.

[0025] By adopting the above technical solution, it is convenient for the raw materials to move downward on the inclined guide surface, thereby entering the spiral feeding pipe.

[0026] Preferably, a vibrator is provided on the side wall of the raw material tank.

[0027] By adopting the above technical solution, clogging of raw materials in the raw material tank can be avoided.

[0028] Preferably, a fixing seat is provided on the side wall of the raw material tank, and the vibrator is arranged on the fixing seat.

[0029] By adopting the above technical solution, the side wall of the conical raw material tank is matched to improve the fixing effect of the vibrator.

[0030] Preferably, a top plate is provided on the top of the feed rack, the top of the raw material tank is connected to the top plate, and a spring is provided between the bottom of the top plate and the top of the feed rack.

[0031] By adopting the above technical solution, the top plate plays the role of connecting the raw material tank, and the top plate cooperates with the spring to improve the vibration effect of the vibrator and facilitate the falling of the raw materials.

[0032] Preferably, a flexible connecting tube is provided between the spiral feeding tube and the feeding hole.

[0033] By adopting the above technical solution, the flexible connecting pipe can prevent the spiral feeding pipe from colliding with the mixing barrel after being vibrated.

[0034] Preferably, an air filter is provided on the top of the raw material tank.

[0035] By adopting the above technical solution, negative pressure in the raw material tank due to the reduction of raw materials can be avoided, and air can be prevented from entering the raw material tank to affect the quality of the final aluminum-silver paste.

[0036] Preferably, the top of the mixing barrel is also provided with an observation hole and a stirring hole for the mixer to pass through, the stirring hole is arranged near the center of the top of the mixing barrel, and the observation hole and the feeding hole are arranged on both sides of the stirring hole.

[0037] By adopting the above technical solution, the internal situation of the mixing barrel can be observed through the observation hole.

[0038] Preferably, the gas protection unit includes an air compressor and a first gas circuit, the first gas circuit includes a feed pump and a discharge pump arranged on both sides of the ball mill, and the first gas circuit is connected to the inside of the feed pump and the discharge pump respectively.

[0039] By adopting the above technical scheme, during the ball milling process of the aluminum-silver paste, inert protective gas is introduced into both ends of the ball mill through gas storage tanks. During the ball milling process of the ball mill, the protective gas is continuously circulated in the ball mill through the feed pump and the discharge pump connected to the two ends of the ball mill, so that the aluminum-silver paste cannot come into contact with oxygen or air during the ball milling process, thereby avoiding the contact between aluminum powder with too large specific surface area and air, avoiding the combustion of aluminum powder, and avoiding the oxidation of aluminum powder and aluminum-silver paste, thereby improving the quality of the final aluminum-silver paste.

[0040] Preferably, the first gas circuit comprises an air blowing valve.

[0041] By adopting the above technical solution, the high-pressure blow valve realizes the function of controlling the flow of liquid or gas, and its operation is mainly controlled by a coil; when the coil is energized, a magnetic field will be created, and the plunger in the coil will move accordingly. The design of the blow valve allows it to close any one of the inspirations. When the current has been removed from the coil, it will return to a closed state. The blow valve has an inlet and an outlet. These two ports allow the gas to be controlled more casually by humans, and the operation reliability is also very high.

[0042] Preferably, the air blowing valve is arranged between the feed pump and the air storage tank.

[0043] By adopting the above technical solution, the intake of the protective gas is controlled.

[0044] Preferably, the air blowing valve is arranged between the discharge pump and the air storage tank.

[0045] By adopting the above technical solution, the outflow of the protective gas is controlled, which can effectively avoid the influence of the gas pressure in the ball mill caused by the increase of temperature, and can also effectively and quickly exhaust the gas so that the protective gas can circulate inside the ball mill.

[0046] Preferably, a one-way valve is provided between the feed pump and the ball mill, and the one-way valve discharges the gas to the outside.

[0047] By adopting the above technical solution, excessive air pressure can be avoided, thus achieving the effect of first-stage exhaust.

[0048] Preferably, the apparatus further comprises a second gas circuit, one end of which is connected to the gas storage tank, and the other end of which is connected to the filter press.

[0049] By adopting the above technical solution, gas protection is provided for the filtration of the filter press, while aluminum powder and the like are prevented from contacting with the air.

[0050] Preferably, it further comprises a third air circuit and a filter pressure pump, wherein the filter pressure pump is connected to the bottom of the vibrating screen, one end of the third air circuit is connected to the filter pressure pump, and the other end of the third air circuit is connected to the air storage tank.

[0051] By adopting the above technical solution, the air pressure is provided to the filter press pump to control the flow of the aluminum-silver paste.

[0052] Preferably, it further comprises a fourth gas circuit and a waste oil pump, wherein there is at least one waste oil pump, one end of the fourth gas circuit is connected to the waste oil pump, and the other end of the fourth gas circuit is connected to the gas storage tank.

[0053] By adopting the above technical solution, the waste oil pump is provided with air pressure for operation, so that the waste oil pump can be controlled for recovery.

[0054] Preferably, the lower material screening part includes a screen frame, which includes an upper material bucket, a vibrating screen and a lower material bucket from top to bottom. A first pipe is provided on the top of the screen frame, and the first pipe extends downward into the upper material bucket. A first discharge port is penetrated through the bottom of the upper material bucket, and the vibrating screen is arranged below the first discharge port. A second pipe is provided at the bottom of the vibrating screen, and the second pipe extends downward and penetrates the lower material bucket. A second discharge port is provided at the bottom of the lower material bucket.

[0055] By adopting the above technical solution, when it is necessary to discharge the material, the aluminum-silver paste that has completed ball milling flows into the upper barrel through the first pipe. Since the opening of the first pipe is located in the upper barrel, the contact of the aluminum-silver paste that has just flowed out with the outside world can be effectively reduced; then it enters the vibrating screen through the first discharge port, and the vibrating screen flows the screened aluminum-silver paste along the second pipe to the next process along the oil. The aluminum-silver paste that has not passed the screening flows into the discharge barrel and is discharged through the second discharge port. In this process, the advantage of gravity is fully utilized to complete the screening of the aluminum-silver paste, while reducing manual intervention in discharge and manual handling of materials.

[0056] Preferably, the cross-sectional shapes of the upper material bucket, the vibrating screen and the lower material bucket are all annular.

[0057] By adopting the above technical solution, the accommodating space is large, thereby preventing the aluminum-silver paste from accumulating therein.

[0058] Preferably, the bottom of the loading barrel is inclined toward the first discharge port.

[0059] By adopting the above technical solution, the aluminum-silver paste flows toward the first discharge port along the inclined side under the action of gravity, thereby avoiding accumulation in the loading barrel.

[0060] Preferably, the bottom of the discharge barrel is inclined toward the second discharge port.

[0061] By adopting the above technical solution, the aluminum-silver paste flows toward the second discharge port along the inclined side under the action of gravity, thereby avoiding accumulation in the discharge barrel.

[0062] Preferably, the first discharge port and the second discharge port are both provided with a four-way ball valve.

[0063] By adopting the above technical solution, a shut-off effect is achieved.

[0064] Preferably, the screen frame comprises at least three vertically arranged tubes, and the bottoms of the upper material barrel and the lower material barrel are provided with fixing plates connected to the tubes.

[0065] By adopting the above technical solution, the structure is simplified and the fixing plate strengthens the connection strength.

[0066] Preferably, the fixing piece is triangular in shape.

[0067] By adopting the above technical solution, the fixing effect is better and the structural strength is higher.

[0068] Preferably, fixing rods are connected between adjacent tube bodies, and the bottom of the vibrating screen is fixedly connected to the fixing rods.

[0069] By adopting the above technical solution, the fixing rod plays a role of supporting the vibrating screen.

[0070] Preferably, the second pipeline is located on the side of the second discharge port.

[0071] By adopting the above technical solution, interference between the second pipeline and the second discharge port can be avoided.

[0072] Preferably, the oil recovery unit includes a recovery oil tank and a new oil tank, the recovery oil tank is connected to a first waste oil pump, the recovery oil tank is connected to a filter press through the first waste oil pump, a filter press conveying device is provided between the recovery oil tank and the new oil tank, and the new oil tank is connected to a cold storage tank.

[0073] By adopting the above technical scheme, after the filter press filters the oil, the first stage of impurity removal is completed, and then the waste oil is pumped into the recovery oil tank through the first waste oil pump. The waste oil in the recovery oil pipe completes the second stage of impurity removal through the filter press conveying device, and then is pumped into the new oil tank, thereby realizing the recovery of waste oil and avoiding waste. At the same time, a closed loop is realized in the entire aluminum-silver paste production process, thereby improving the utilization rate of raw materials and being more environmentally friendly.

[0074] Preferably, the filter press and conveying device includes a second waste oil pump, a manual filter press and a liquid collection tray, the second waste oil pump connects the manual filter press with the recovery oil tank, the liquid collection tray is connected with the new oil tank, and the liquid collection tray collects the oil filtered by the manual filter press.

[0075] By adopting the above technical solution, the second waste oil pump pumps the oil at the bottom of the recovery oil tank into the manual filter press, and then removes impurities through filtration by the manual filter press, and then removes impurities for the second time through the liquid collection tray, and finally pumps it into the new oil tank through the return oil pump.

[0076] Preferably, the recovery oil tank, the liquid collecting tray and the new oil tank are all provided with liquid level gauges.

[0077] By adopting the above technical solution, the oil volume in the oil tank is displayed, and the start and shut down of the first waste oil pump, the second waste oil pump and the return oil pump are controlled in time.

[0078] Preferably, an oil return pump is provided between the liquid collecting pan and the new oil tank, and the liquid collecting pan is connected to the new oil tank via the oil return pump.

[0079] By adopting the above technical solution, the automatic recovery of the oil in the liquid collecting tray is achieved.

[0080] Preferably, the first waste oil pump is connected to an air storage tank.

[0081] By adopting the above technical solution, the first waste oil pump and the second waste oil pump are both connected to the air storage tank to achieve the driving of the waste oil pump.

[0082] Preferably, the second waste oil pump is connected to the bottom of the oil recovery tank.

[0083] By adopting the above technical solution, the waste oil flows toward the second waste oil pump with a pressure difference.

[0084] Preferably, the oil recovery tank is connected to at least one filter press.

[0085] By adopting the above technical solution, the waste oil after filtration of multiple production lines or multiple filter presses can be recovered, thereby improving the recovery efficiency.

[0086] Preferably, the oil circuit cooling unit includes a water chiller, a refueling pump is arranged between the new oil tank and the cold oil storage tank, the cold oil storage tank is connected to the water chiller, a circulating pump is arranged between the water chiller and the cold oil storage tank, the water chiller cools the oil in the cold oil storage tank through the circulating pump, and the cold oil storage tank is connected to a mixer.

[0087] By adopting the above technical scheme, kerosene is stored in the new oil tank, and when the oil level in the cold storage tank is low, the new oil tank replenishes kerosene to the cold storage tank; at the same time, the chiller cools the kerosene in the cold storage tank, and the circulating pump plays the role of circulating kerosene. Then, the kerosene-mixed aluminum material with lower temperature in the cold contact tank enters the ball mill, which effectively reduces the temperature in the ball mill, avoids the high temperature in the ball mill to a certain extent, avoids the gray and dark surface of the aluminum powder, and improves the product quality of the final aluminum silver paste.

[0088] Preferably, an oil inlet pump and a back pressure valve are provided between the cold oil storage tank and the mixer.

[0089] By adopting the above technical solution, the kerosene in the cold oil storage tank is pumped into the mixing barrel, and the back pressure valve prevents oil from backflowing.

[0090] Preferably, the cold oil storage tank is connected to the top of the mixing barrel.

[0091] By adopting the above technical solution, kerosene can be effectively supplemented to the mixing barrel.

[0092] Preferably, a weighing sensor is provided at the bottom of the cold oil storage tank.

[0093] By adopting the above technical solution, the delivery amount of oil is controlled.

[0094] Preferably, the capacity of the cold oil storage tank is 1000L-1500L.

[0095] By adopting the above technical solution, the normal operation of at least two ball mills can be met. At the same time, the larger the capacity of kerosene, the slower the temperature drops, thereby ensuring the cooling effect on the ball mill.

[0096] Preferably, the capacity of the new oil tank is 3000-7000L.

[0097] By adopting the above technical solution, the new oil tank replenishes the oil in the cold storage tank.

[0098] Preferably, the cold oil storage tank is connected to at least one mixing barrel.

[0099] By adopting the above technical solution, cooling kerosene can be replenished for multiple production lines at the same time.

[0100] Preferably, it also includes a recovery oil tank, which is connected to a first waste oil pump. The recovery oil tank is connected to a filter press through the first waste oil pump, and a filter press conveying device is provided between the recovery oil tank and the new oil tank.

[0101] By adopting the above technical solution, the recycled kerosene can be re-input into the new oil tank through the first waste oil pump, which is more environmentally friendly.

[0102] Preferably, the filter press and conveying device includes a waste oil pump, a manual filter press and a liquid collection tray, the waste oil pump connects the manual filter press with the recovery oil tank, the liquid collection tray is connected with the new oil tank, and the liquid collection tray collects the oil filtered by the manual filter press.

[0103] By adopting the above technical solution, the kerosene and aluminum-silver paste after ball milling are separated, the discharge of waste oil is reduced and the utilization rate of kerosene is effectively improved.

[0104] Preferably, the recovery oil tank is connected to a first waste oil pump, the recovery oil tank is connected to a filter press through the first waste oil pump, and a filter press conveying device is provided between the recovery oil tank and the new oil tank.

[0105] In summary, during the production and preparation process of aluminum-silver paste, it needs to be ball-milled in a ball mill for more than 10 hours, and then the aluminum-silver paste after ball milling needs to go through multiple process flows such as filter pressing and screening. During the ball milling process, other process steps need to wait for the aluminum-silver paste after ball milling. Therefore, by setting up at least two ball mills and staggering the ball milling processes of the two, one ball mill can be used for ball milling and the other ball mill can be used for unloading, thereby improving production efficiency; at the same time, the gas protection part and the oil circuit cooling part improve the quality of the aluminum-silver paste from two aspects. One is to isolate the aluminum powder from contact with air during the grinding process, thereby reducing oxidation; the other is that during the aluminum powder grinding process, the oil circuit cooling part reduces the temperature of the mixture entering the ball mill, thereby increasing the temperature of the aluminum powder during grinding, thereby improving the quality of the aluminum-silver paste; at the same time, kerosene is recycled and reused through the oil recovery part, which is more environmentally friendly and avoids waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 It is a structural schematic diagram of the ball milling unit;

[0107] Figure 3 It is a schematic diagram of the structure of the feed rack;

[0108] Figure 4 It is a schematic diagram of the transverse section of the mixing barrel;

[0109] Figure 5 It is a schematic diagram of the longitudinal section of the mixing barrel;

[0110] Figure 6 It is a structural diagram of the screen frame;

[0111] Figure 7 It is a top view of the loading barrel;

[0112] Figure 8 It is a top view of the discharge barrel;

[0113] In the figure, 1, ball milling unit; 11, infrared thermometer; 12, additive barrel; 13, additive pump; 2, frame; 21, first ball mill; 22, second ball mill; 23, bearing seat; 24, first rotating device; 241, first rotating motor; 242, first gearbox; 2441, driving pulley; 2442, driven pulley; 25, second rotating device; 251, second rotating motor; 252, second gearbox; 26, reinforcement plate; 27, reinforcing rod; 28, reinforcing plate; 31, recovery oil tank; 32, new oil tank; 33, first waste oil pump; 34, filter press; 35, filter press conveying device; 351, second waste oil pump; 352, manual filter press; 353, liquid collecting tray; 354, oil return pump; 355, gas tank; 41, cold oil tank; 42, refueling pump; 43, circulation pump; 44, oil inlet pump; 45, back pressure valve; 46, weighing sensor; 47, Chiller; 51, screen frame; 511, pipe body; 512, fixing plate; 513, fixing rod; 52, upper barrel; 53, vibrating screen; 54, lower barrel; 55, first pipeline; 56, first discharge port; 57, second pipeline; 58, second discharge port; 59, four-way ball valve; 6, feed rack; 61, raw material tank; 611, cover body; 612, top plate; 613, spring; 614, air filter; 62, mixing barrel; 62 1. Feeding hole; 622. Oiling hole; 623. Stirring hole; 624. Observation hole; 625. Flexible connecting pipe; 63. Spiral feeding pipe; 64. Discharge pipe; 65. Mixer; 66. Vibrator; 661. Fixed seat; 71. Air compressor; 72. First air circuit; 721. Feed pump; 722. Discharge pump; 723. Blowing valve; 724. One-way valve; 73. Second air circuit; 731. Filter press pump; 74. Fourth air circuit. DETAILED DESCRIPTION

[0114] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0115] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0116] Example: Figure 1 As shown, a wet grinding metallic pigment preparation system comprises a raw material supply section, a ball milling section 1 and a vibrating discharge section, wherein the ball milling section 1 comprises at least two ball mills, each ball mill is connected to the raw material supply section, each ball mill is connected to the vibrating discharge section, and a feed pump 721 and a discharge pump 722 are arranged at both ends of each ball mill; an infrared thermometer 11 is arranged on the ball mill, and a one-way valve 724 is arranged between the ball mill and the feed pump 721 to play a role in maintaining pressure.

[0117] The raw material supply unit includes a raw material tank 61, a mixing barrel 62, an auxiliary agent barrel 12 and a cold oil storage tank 41. The mixing barrel 62 is connected to each ball mill. The raw material tank 61, the auxiliary agent barrel 12 and the cold oil storage tank 41 are all connected to the mixing barrel 62. A stirrer 65 is provided on the mixing barrel 62. The stirrer 65 includes a stirring rod extending into the mixing barrel 62. The materials entering the mixing barrel 62 are mixed by rotating the stirring rod. An oil feed pump 44 and a back pressure valve 45 are provided between the cold oil storage tank 41 and the mixing barrel 62.

[0118] The raw material tank 61, the additive barrel 12 and the cold oil storage tank 41 are all connected to the top of the mixing barrel 62, and the bottom of the mixing barrel 62 is connected to each of the ball mills. The specific structures of the raw material tank 61, the additive barrel 12 and the cold oil storage tank 41 are disclosed below. At the same time, a vibrator is arranged on the raw material tank 61, and a screw feeder is arranged at the bottom of the raw material tank 61. The screw feeder, i.e., a screw feeding pipe 63, realizes feeding by rotating the screw driven by a motor. An additive pump 13 is arranged on the top of the additive barrel 12, and the additive barrel 12 is connected to the top of the mixing barrel 62 through the additive pump 13.

[0119] The vibrating unloading part includes an upper material barrel 52, a vibrating screen 53 and a lower material barrel 54 from top to bottom. After the ball milling is completed, the aluminum-silver paste is screened into aluminum-silver pastes of different finenesses through the upper material barrel 52, the vibrating screen 53 and the lower material barrel 54.

[0120] During the production and preparation process of aluminum-silver paste, it needs to be ball-milled in a ball mill for more than 10 hours, and then the aluminum-silver paste after ball milling needs to go through multiple process flows such as filter pressing and screening. During the ball milling process, other process steps need to wait for the aluminum-silver paste after ball milling. Therefore, by setting up at least two ball mills and staggering the ball milling processes of the two, one ball mill can be used for ball milling and the other ball mill can be used for unloading, thereby improving production efficiency.

[0121] like Figure 2 As shown, a symmetrical ball milling device includes a rectangular frame 2, which is connected by steel pipe welding. A first ball mill 21 and a second ball mill 22 are arranged on the frame 2. The first ball mill 21 and the second ball mill 22 both include a feed shaft and a discharge shaft. A bearing seat 23 is arranged on the frame 2. The bearing seat 23 is rotatably connected to the feed shaft and the discharge shaft. The first ball mill 21 and the second ball mill 22 are arranged in rotational symmetry. A first base is arranged on the frame 2. The first base is respectively arranged at the bottom of the first ball mill 21 and the second ball mill 22. The first base includes a reinforcing plate 26 arranged on the frame 2, and the reinforcing plate 26 extends in a horizontal direction. The bearing seat 23 is arranged on the reinforcing plate 26. The reinforcing plate 26 plays a role in extending the position of the bearing seat 23, thereby enhancing the structural strength and adapting to the axial length of the ball mill.

[0122] like Figure 2 As shown, a first rotating device 24 and a second rotating device 25 are provided on the frame 2. The first rotating device 24 drives the first ball mill 21 to rotate, and the second rotating device 25 drives the second ball mill 22 to rotate. The first rotating device 24 and the second rotating device 25 are rotationally symmetrically arranged. The first rotating device 24 is arranged on the side of the first ball mill 21, and the second rotating device 25 is arranged on the side of the second ball mill 22.

[0123] like Figure 2 As shown, the first rotating device 24 includes a first rotating motor 241, a first gearbox 242, a first driving belt and a first synchronous belt. The first driving belt is arranged between the first rotating motor 241 and the first gearbox 242, and the first synchronous belt is arranged between the first gearbox 242 and the first ball mill 21. The first synchronous belt includes a driving pulley 2441 and a driven pulley 2442. The driving pulley 2441 is arranged on the first rotating motor 241, and the driven pulley 2442 is sleeved on the outer circumference of the first ball mill 21. The pulley 2441 and the first synchronous belt cooperate with each other. When the first rotating motor 241 drives the first driving belt to rotate, the first driving belt drives the first gearbox 242 to rotate. The output end of the first gearbox 242 drives the active pulley 2441 to rotate. The first synchronous belt mounted on the active pulley 2441 and the driven pulley 2442 drives the driven pulley 2442 to rotate. Since the driven pulley 2442 is mounted outside the first ball mill 21, when the driven pulley 2442 rotates, the first ball mill 21 rotates, thereby realizing ball milling.

[0124] like Figure 2 As shown, a second base is provided on the frame 2, and the second base is respectively arranged at the bottom of the first rotating device 24 and the second rotating device 25. The second base includes a reinforcing rod 27 and a reinforcing plate 28. The reinforcing rod 27 is arranged on the frame 2, and two reinforcing rods 27 are arranged in parallel. The reinforcing plate 28 is arranged on the reinforcing rod 27. The first rotating motor 241 and the first gearbox 242 are arranged on the reinforcing plate 28, which play a role in supporting the first rotating device 24 and the second rotating device 25.

[0125] like Figure 2As shown, the second rotating device 25 has the same structure as the first rotating device 24. The second rotating device 25 includes a second rotating motor 251, a second gearbox 252, a second drive belt and a second synchronous belt. The second drive belt is arranged between the second rotating motor 251 and the second gearbox 252, and the second synchronous belt is arranged between the second gearbox 252 and the second ball mill 22. During the ball milling process, other process steps need to wait for the aluminum-silver paste after ball milling. Therefore, by setting the first ball mill 21 and the second ball mill 22, the ball milling processes of the two are staggered, so that one ball mill can perform ball milling and the other ball mill can perform unloading, thereby improving production efficiency. At the same time, the first ball mill 21 and the second ball mill 22 that are rotationally symmetrically arranged save more space inside the factory building. At the same time, when both are working, the vibration of the frame 2 is effectively reduced.

[0126] like Figure 3 As shown, a metal pigment feeding device includes a feeding rack 6, which is welded from steel pipes or I-beams, a raw material tank 61 is arranged on the upper part of the feeding rack 6, and the cross-sectional shape of the raw material tank 61 is annular, a cover body 611 is arranged on the top of the raw material tank 61, and an air filter 614 is arranged on the top of the raw material tank 61, that is, on one side of the cover body 611, the bottom of the raw material tank 61 is conical, and a spiral feeding pipe 63 is arranged at the bottom of the conical raw material tank 61, and the spiral feeding pipe 63 is a tube body 511, one end of which is provided with a motor and the other end is open, a screw connected to the motor for rotation is arranged in the tube body 511, and feeding is realized by the rotation of the screw; a vibrator 66 is arranged on the side wall of the raw material tank 61, that is, a fixing seat 661 is welded to the raw material tank 61, and the vibrator 66 is bolted on the fixing seat 661, and the vibrator 66 generates vibration force in the raw material tank 61.

[0127] In order to further improve the vibration effect, a top plate 612 is provided on the top of the feed rack 6, the top of the raw material tank 61 is welded to the top plate 612, and a spring 613 is provided between the bottom of the top plate 612 and the top of the feed rack 6. The spring 613 is evenly distributed between the top plate 612 and the feed rack 6, thereby improving the vibration effect and amplitude of the vibrator 66 on the raw material tank 61.

[0128] like Figure 3 , Figure 4 and Figure 5As shown, a mixing barrel 62 is provided at the lower part of the feeding rack 6, and a feeding hole 621, a refueling hole 622, an observation hole 624 and a stirring hole 623 for the mixer 65 are provided at the top of the mixing barrel 62, and the stirring hole 623 is arranged near the center of the top of the mixing barrel 62, and the observation hole 624 and the feeding hole 621 are arranged on both sides of the stirring hole 623. A transparent glass is provided on the observation hole 624 to prevent dust and impurities from entering. The feeding hole 621 is connected to the bottom of the raw material tank 61 through the spiral feeding pipe 63, and a flexible connecting pipe 625 is provided between the spiral feeding pipe 63 and the feeding hole 621. The flexible connecting pipe 625 is provided between the spiral feeding pipe 63 and the feeding hole 621. The connecting pipe 625 prevents the vibration from being transmitted to the mixing barrel 62. A discharge pipe 64 is arranged at the bottom of the mixing barrel 62, and the discharge pipe 64 is connected to the subsequent processing link. A stirrer 65 is arranged on the top of the mixing barrel 62, and a stirring rod extending into the mixing barrel 62 is arranged on the stirrer 65; the raw material tank 61 is filled with aluminum powder or aluminum balls, which moves downward through the vibrator 66, and then moves into the mixing barrel 62 under the action of the bolt feed pipe. During this process, kerosene is quantitatively injected into the filling hole 622, and the stirrer 65 rotates to mix the aluminum balls with the additives and kerosene, and the stirring situation is observed through the observation hole 624.

[0129] like Figure 6 As shown, a metallic pigment vibration discharging and screening mechanism comprises a screen frame 51, which comprises an upper material barrel 52, a vibrating screen 53 and a lower material barrel 54 from top to bottom. A first pipe 55 is arranged on the top of the screen frame 51, and the first pipe 55 extends downward into the upper material barrel 52. A first discharge port 56 is penetrated through the bottom of the upper material barrel 52. The vibrating screen 53 is arranged below the first discharge port 56. A second pipe 57 is arranged on the bottom of the vibrating screen 53, and the second pipe 57 extends downward and penetrates the lower material barrel 54. A second discharge port 58 is arranged on the bottom of the lower material barrel 54. The first pipe 55 is upwardly connected to the discharging pipe of the ball mill.

[0130] The first pipeline 55 and the second pipeline 57 are both galvanized pipelines. At the same time, pipe fittings are provided on the first discharge port 56 and the second discharge port 58. A four-way ball valve 59 is provided in the pipe fittings for opening and closing.

[0131] like Figure 6 and Figure 7 As shown, the cross-sectional shapes of the upper material barrel 52, the vibrating screen 53 and the lower material barrel 54 are all annular, the bottom of the upper material barrel 52 is inclined toward the first discharge port 56, and the bottom of the lower material barrel 54 is inclined toward the second discharge port 58, that is, the bottom of the upper material barrel 52 and the bottom of the lower material barrel 54 are both inverted cones, which accelerates the flow of the aluminum-silver paste.

[0132] like Figure 8As shown, in order to avoid interference between the second pipe 57 and the second discharge port 58, the second pipe 57 is located on the side of the second discharge port 58, and the second discharge barrel 54 is fixed to the second pipe 57 by welding.

[0133] The screen frame 51 includes at least three vertically arranged tubes 511. According to the size of the upper material barrel 52, more tubes 511 can be selected as supports. The bottom of the upper material barrel 52 and the lower material barrel 54 are provided with fixing plates 512 connected to the tubes 511. The fixing plates 512 are fixed on both sides by welding. In order to better seal, a sealing barrel can also be arranged outside the screen frame 51.

[0134] like Figure 6 As shown, in order to improve the fixing effect of the vibration screen 53, a fixing rod 513 is connected between adjacent tube bodies 511. The fixing rod 513 is made of galvanized flat iron, and the bottom of the vibration screen 53 is welded and fixed to the fixing rod 513; when unloading is required, the aluminum-silver paste after ball milling flows into the upper material barrel 52 through the first pipe 55. Since the opening of the first pipe 55 is located in the upper material barrel 52, the contact between the aluminum-silver paste just flowing out and the outside world can be effectively reduced; and then enters the vibration screen 53 through the first discharge port 56. The vibration screen 53 flows the screened aluminum-silver paste along the second pipe 57 to the next process along the oil, and the aluminum-silver paste that has not passed the screening flows into the lower material barrel 54 and is discharged through the second discharge port 58. In this process, the advantage of gravity is fully utilized to complete the screening of the aluminum-silver paste.

[0135] like Figure 1 As shown, a wet grinding metal pigment oil recovery system includes a recovery oil tank 31 and a new oil tank 32. The recovery oil tank 31 is connected to at least one filter press 34. When there are multiple vibrating screens 53 or multiple production lines, the recovery oil tank 31 can be connected to multiple filter presses 34. The recovery oil tank 31 is connected to a first waste oil pump 33. The recovery oil tank 31 is connected to the filter press 34 through the first waste oil pump 33. A filter press conveying device 35 is provided between the recovery oil tank 31 and the new oil tank 32.

[0136] like Figure 1 As shown, the filter pressing and conveying device 35 includes a second waste oil pump 351, a manual filter press 352 and a liquid collecting pan 353. The second waste oil pump 351 realizes the connection between the manual filter press 352 and the recovery oil tank 31 through a pipeline. The second waste oil pump 351 is connected to the bottom of the recovery oil tank 31. Since the interval time of recovering oil is long and the amount of recovered oil is small, the liquid collecting pan 353 is connected to the new oil tank 32 through a pipeline. At the same time, an oil return pump 354 is arranged between the liquid collecting pan 353 and the new oil tank 32. The liquid collecting pan 353 is connected to the new oil tank 32 through the oil return pump 354. The oil in the liquid collecting pan 353 is pumped into the new oil tank 32 through the oil return pump 354. The liquid collecting pan 353 collects the oil filtered by the manual filter press 352.

[0137] like Figure 1 As shown, an air tank 355 is provided in the factory building, and the air tank 355 is connected to the first waste oil pump 33 and the second waste oil pump 351 through an air pipe to provide power for the operation of the first waste oil pump 33 and the second waste oil pump 351.

[0138] like Figure 1 As shown, the recovery oil tank 31, the liquid collecting tray 353 and the new oil tank 32 are all provided with liquid level gauges for convenient observation. After the filter press 34 filters the oil, the first stage of impurity removal is completed, and then the waste oil is pumped into the recovery oil tank 31 through the first waste oil pump 33. The waste oil in the recovery oil pipe completes the second stage of impurity removal through the filter press conveying device 35, and then is pumped into the new oil tank 32, thereby realizing the recovery of waste oil.

[0139] like Figure 1 As shown, a metal pigment wet grinding gas protection system includes an air compressor 71, a gas storage tank 355 and a first gas circuit 72. The first gas circuit 72 includes a feed pump 721 and a discharge pump 722 arranged on both sides of the ball mill. The first gas circuit 72 is connected to the inside of the feed pump 721 and the discharge pump 722 respectively.

[0140] like Figure 1 As shown, the first air path 72 includes a blow valve 723, which is a high-pressure blow valve 723 for controlling the size and pressure of the air flow. The blow valve 723 is arranged between the feed pump 721 and the air storage tank 355, and the blow valve 723 is also arranged between the discharge pump 722 and the air storage tank 355. The blow valve 723 is connected to the feed pump 721 and the discharge pump 722 through an air pipe, and enters the ball mill with the unground aluminum-silver paste, and also leaves the ball mill with the ground aluminum-silver paste and enters the vibrating screen 53.

[0141] like Figure 1 As shown, a one-way valve 724 is provided between the feed pump 721 and the ball mill, and the one-way valve 724 discharges gas to the outside to prevent the gas pressure in the ball mill from being too high.

[0142] like Figure 1As shown, it also includes a second gas circuit 73, a third gas circuit, a filter pressure pump 731, a fourth gas circuit 74 and a waste oil pump, one end of the second gas circuit 73 is connected to the gas storage tank 355, the other end of the second gas circuit 73 is connected to the filter press 34, the filter pressure pump 731 is connected to the bottom of the vibrating screen 53, one end of the third gas circuit is connected to the filter pressure pump 731, the other end of the third gas circuit is connected to the gas storage tank 355, there is at least one waste oil pump, one end of the fourth gas circuit 74 is connected to the waste oil pump, and the other end of the fourth gas circuit 74 is connected to the gas storage tank 355; during the ball milling process of the aluminum-silver paste, inert protective gas is introduced into both ends of the ball mill through the gas storage tank 355, and during the ball milling process of the ball mill, the protective gas is continuously circulated in the ball mill through the feed pump 721 and the discharge pump 722 connected to both ends of the ball mill, so that the aluminum-silver paste cannot come into contact with oxygen or air during the ball milling process, thereby avoiding the aluminum powder with too large specific surface area from coming into contact with the air.

[0143] like Figure 1 As shown, a metal pigment wet grinding oil circuit cooling system includes a new oil tank 32 and a cold oil storage tank 41. A weighing sensor 46 is provided at the bottom of the cold oil storage tank 41 for real-time detection of the amount of kerosene in the cold oil storage tank 41. When the kerosene capacity is low, the cold oil storage tank 41 is replenished through the new oil tank 32.

[0144] A refueling pump 42 is arranged between the new oil tank 32 and the cold oil storage tank 41 to replenish the oil in the cold oil tank in time. Therefore, the capacity of the new oil tank 32 is 3000-7000L, which can meet the replenishment of multiple cold oil storage tanks 41 at the same time. The cold oil storage tank 41 is connected to a chiller 47. A circulating pump 43 is arranged between the chiller 47 and the cold oil storage tank 41. The chiller 47 cools the oil in the cold oil storage tank 41 through the circulating pump 43. In order to avoid cooling too much kerosene at the same time, the capacity of the cold oil storage tank 41 is 1000L-1500L, which can meet the needs of at least one ball milling.

[0145] The cold oil storage tank 41 is connected to the mixer 65 through a pipeline. An oil feed pump 44 and a back pressure valve 45 are provided on the pipeline between the cold oil storage tank 41 and the mixer 65. The cold oil storage tank 41 is connected to the top of the mixing barrel 62. The oil feed pump 44 pumps kerosene into the mixing barrel 62 at the bottom of the mixer 65.

[0146] In order to supply kerosene to multiple production lines, the cold oil storage tank 41 is connected to at least one mixing tank 62 .

[0147] At the same time, in order to ensure the recycling of oil, the recovery oil tank 31 is connected to the first waste oil pump 33, the recovery oil tank 31 is connected to the filter press 34 through the first waste oil pump 33, a filter press conveying device 35 is arranged between the recovery oil tank 31 and the new oil tank 32, and a refueling pump 42 is arranged between the new oil tank 32 and the mixing barrel 62. The filter press conveying device 35 includes a waste oil pump, a manual filter press 352 and a liquid collecting tray 353. The waste oil pump connects the manual filter press 352 with the recovery oil tank 31, and the liquid collecting tray 353 is connected with the new oil tank 32. The liquid collecting tray 353 collects the oil after filtering by the manual filter press 352. Kerosene is stored in the new oil tank 32. When the oil level in the cold oil tank 41 is low, the new oil tank 32 replenishes the cold oil tank 41 with kerosene. At the same time, the chiller 47 cools the kerosene in the cold oil tank 41, and the circulating pump 43 circulates the kerosene. Then, the kerosene-mixed aluminum material with a lower temperature in the cold oil tank enters the ball mill, which effectively reduces the temperature in the ball mill and avoids the effect of a higher temperature in the ball mill to a certain extent.

Claims

1. An aluminum silver paste gas shielded ball milling system, characterized by: It includes a raw material supply part, a symmetrical ball milling part, a gas protection part, a material screening part, an oil recovery part and an oil circuit cooling part. The raw material supply part includes a raw material tank, a mixing barrel and a cold oil storage tank. The mixing barrel is connected with the raw material tank and the cold oil storage tank respectively. The mixing barrel mixes aluminum powder and kerosene and transports them to the symmetrical ball milling part. The symmetrical ball milling part includes at least two independent ball mills. The gas protection part includes a gas storage tank, which is connected with the symmetrical ball milling part and fills the symmetrical ball milling part with protective gas. The gas protection part includes an air compressor and a first gas circuit. The first gas circuit includes a feed pump and a discharge pump arranged on both sides of the ball mill. The first gas path is connected to the inside of the feed pump and the discharge pump respectively, the oil recovery part includes a recovery oil tank and a new oil tank, the recovery oil tank is connected to the first waste oil pump, the recovery oil tank is connected to the filter press through the first waste oil pump, a filter press conveying device is arranged between the recovery oil tank and the new oil tank, the new oil tank is connected to a cold storage tank, the oil circuit cooling part includes a chiller, a refueling pump is arranged between the new oil tank and the cold storage tank, the cold storage tank is connected to the chiller, a circulating pump is arranged between the chiller and the cold storage tank, the chiller cools the oil in the cold storage tank through the circulating pump, and the cold storage tank is connected to a mixer.

2. The aluminum-silver paste gas-protected ball milling system according to claim 1, characterized in that: The symmetrical ball milling part includes a first rotating device, a second rotating device, a first ball mill and a second ball mill. The first ball mill and the second ball mill both include a feed shaft, a discharge shaft and a bearing seat. The bearing seats are rotatably connected to the feed shaft and the discharge shaft. The first ball mill and the second ball mill are rotationally symmetrically arranged. The first rotating device drives the first ball mill to rotate, and the second rotating device drives the second ball mill to rotate. The first rotating device and the second rotating device are rotationally symmetrically arranged. The first rotating device is arranged on the side of the first ball mill, and the second rotating device is arranged on the side of the second ball mill.

3. The aluminum-silver paste gas-protected ball milling system according to claim 1, characterized in that: The raw material supply part also includes a feeding rack, the raw material tank is arranged on the upper part of the feeding rack, the mixing barrel is arranged on the lower part of the feeding rack, the top of the raw material tank is provided with a cover body, the top of the mixing barrel is provided with a feeding hole and an oil filling hole, the bottom of the raw material tank is provided with a spiral feeding pipe connected with the feeding hole, the bottom of the mixing barrel is provided with a discharge pipe, the top of the mixing barrel is provided with a mixer, and the mixer is provided with a mixing rod extending into the mixing barrel.

4. The aluminum-silver paste gas-protected ball milling system according to claim 1, characterized in that: The lower material screening part includes a screen frame, which includes an upper material bucket, a vibrating screen and a lower material bucket from top to bottom. A first pipe is arranged on the top of the screen frame, and the first pipe extends downward into the upper material bucket. A first discharge port is penetrated through the bottom of the upper material bucket. The vibrating screen is arranged below the first discharge port. A second pipe is arranged on the bottom of the vibrating screen, and the second pipe extends downward and penetrates the lower material bucket. A second discharge port is arranged at the bottom of the lower material bucket.

5. The aluminum-silver paste gas-protected ball milling system according to claim 1, characterized in that: The filter press and conveying device includes a waste oil pump, a manual filter press and a liquid collecting pan. The waste oil pump connects the manual filter press with the recovery oil tank, the liquid collecting pan is connected with the new oil tank, and the liquid collecting pan collects the oil filtered by the manual filter press.

Images