TWM615394U - Microwave mixing device - Google Patents

Abstract

A microwave mixing device for irradiating a mineral, which includes: a microwave cavity, a plurality of microwave generating parts, a conveying part and a driving device. The microwave cavity has an inlet and an outlet. The microwave generating elements are arranged in the microwave cavity, and each microwave generating element has a microwave emitting end. The microwave emitting end is arranged in the microwave cavity and emits microwaves into the microwave cavity. The conveying member is arranged in the microwave cavity and has a shaft body and a spiral plate. The spiral plate is arranged on the shaft body, and the shaft system extends from the feed port toward the discharge port. The driving device is connected to the shaft body and drives the shaft body to rotate. The rotation of the shaft drives the spiral plate to rotate, and the rotation of the spiral plate makes the mineral move from the feed port to the discharge port, and the microwave generated by the microwave generating element is irradiated to the mineral.

Description

Microwave mixing device

This creation is related to the technical field of mineral processing, especially a microwave mixing device for mineral water removal.

Most of the extraction of various metals is to first dig ore or ore from the vein, and then transport the ore or ore to the refining unit or factory, and then extract the metal, such as iron ore, aluminum ore or nickel ore. For some mineral soils with high water content, such as laterite-type bauxite and nickel ore, the existing treatment method is to directly transport the mineral soil to the refining unit or factory at the destination, and proceed in the refining unit or factory first. After removing the water, it enters the refining process.

This existing treatment method allows the high-water content mineral soil to be transported from the mining area to the refining plant, thus increasing the weight of the transportation. At the same time, for the same volume of cargo ship or truck, the volume of the mineral soil that can be transported each time is reduced. , Resulting in an increase in the cost of transportation, and the need to build water removal equipment in the refining plant, but also an increase in the construction cost of the refining plant and the complexity of the process.

In addition, the existing mineral soil water removal equipment is to heat the mineral soil to remove water. Since the mineral soil contains high viscosity materials such as clay, the water content that can be removed by direct heating is limited in a given time.

In view of this, the purpose of this creation is to provide a microwave mixing device. After the minerals are chopped by the mineral crushing device, the microwave mixing device of this creation is used to irradiate the microwave to reduce the viscosity of the minerals, and to further refine the particle size of the minerals, and finally enter the rotary furnace for heating, which greatly reduces the water content.

The microwave mixing device of this creation is used to irradiate a mineral, and it includes: a microwave cavity, a plurality of microwave generating parts, a conveying part and a driving device. The microwave cavity has an inlet and an outlet. The microwave generating elements are arranged in the microwave cavity, and each of the microwave generating elements has a microwave emitting end. The microwave emitting end is arranged in the microwave cavity and emits microwaves toward the microwave cavity. The conveying member is arranged in the microwave cavity and has a shaft body and a spiral plate. The spiral plate is arranged on the shaft body, and the shaft system extends from the feed port toward the discharge port. The driving device is connected to the shaft body and drives the shaft body to rotate. The rotation of the shaft drives the spiral plate to rotate, and the rotation of the spiral plate moves the mineral from the inlet to the outlet, and the microwave generated by the microwave generating member irradiates the mineral.

The microwave mixing device created by this invention generates microwaves and irradiates the minerals, reduces the viscosity of the mineral soil, further refines the minerals, and loosens the structure of the minerals. On the one hand, the total surface area of the mineral soil is increased, and on the other hand, the mineral is weakened. The soil's ability to retain moisture increases the heating area of the mineral during the subsequent heating process of the rotary furnace, and the moisture is easily separated from the mineral soil, which makes the moisture in the mineral easy to evaporate and greatly reduces the water content.

Please refer to Figure 1, Figure 2, Figure 3, and Figure 4, which show an embodiment of the first microwave mixing device or the second microwave mixing device of the present invention. The microwave mixing device 10 of the present invention includes a microwave cavity 11, a plurality of microwave generating parts 12 and a conveying part 13.

The microwave cavity 11 is a hollow cavity with an inlet 111 and an outlet 112. The inlet 111 and the outlet 112 are respectively arranged at opposite ends of the microwave cavity 11. The feeding port 111 has a feeding hopper 113 which is erected upward, and the minerals are guided by the feeding hopper 113 through the feeding port 111 into the microwave cavity 11. The discharge port 112 faces below the microwave cavity 11, and the microwave-treated mineral leaves the microwave cavity 11 from the discharge port 112. The "above" referred to here refers to the direction away from the ground, and "below" refers to the direction toward the ground.

As shown in Figures 1 and 2, the microwave generating element 12 is inserted into the outer shell of the microwave cavity 11. Each microwave generating element 12 has a microwave emitting end, and the microwave emitting end is located in the microwave cavity 11. The end emits microwaves, and the microwaves irradiate the minerals conveyed to the microwave cavity 11, and because the microwave cavity 11 of this embodiment is made of metal, the microwaves can be continuously reflected by the microwave cavity 11 and repeatedly irradiated to the minerals. In this embodiment, the microwave cavity 11 is a polygonal cavity. As shown in Figure 1, the microwave cavity 11 is composed of twelve rectangular metal plates arranged in pairs along an circumscribed cylindrical surface to form a tube. Shaped structure. Among the six rectangular metal plates in the upper half (180 degrees), each rectangular metal plate is provided with two rows of holes, so there are a total of 12 rows of holes, and each hole is equipped with a microwave Produce pieces 12. In this embodiment, the microwave generating element 12 is a magnetron. The magnetron has a central cathode, an anode surrounding the central cathode, and magnets arranged at both ends of the cathode and the anode in the axial direction. A high voltage is applied between the cathode and the anode, and the cathode is heated, so that thermionics are freed between the cathode and the anode. When moving in the electric field space of, and the magnetic field generated by the magnets at both ends, microwaves are generated in the resonant cavity between the cathode and the anode, and the generated microwaves are emitted into the microwave cavity 11 through the antenna at the microwave emitting end. Since the magnetron requires a high voltage, a plurality of voltage transformers 16 are arranged on both sides of the microwave cavity 11 to convert the voltage of the mains power (110V or 220V) into the high voltage (4000V) required by the magnetron.

As shown in Figure 4, the conveying member 13 is arranged in the microwave cavity 11. The conveying member 13 of this embodiment is a screw device, which includes a shaft 131 and a spiral plate 132, which is along the axial direction of the shaft 131 set up. Both ends of the shaft body 131 are rotatably supported by bearings B, respectively. Please refer to FIGS. 1 and 3 at the same time. One end of the shaft body 131 is connected to a driving device 17, and the driving device 17 drives the shaft body 131 to rotate to rotate the spiral plate 132. In this embodiment, the driving device 17 is an electric motor. The output shaft of the driving device 17 is connected to the shaft body 131 via a coupling, so that the driving device 17 can drive the shaft body 131 to rotate.

Referring to Figures 4 and 6, a plurality of air inlets 115 are provided at one end of the microwave cavity 11 close to the discharge port 112, and an air outlet 116 is provided at the end of the microwave cavity 11 close to the feed hopper 113 The air inlet 115 is provided with a plurality of airflow generating members 117. In this embodiment, the airflow generating member 117 is a fan. The air port 116 is discharged.

As shown in FIGS. 1, 2 and 3, the microwave cavity 11, the microwave generating member 12, the conveying member 13, the voltage transformer 16 and the driving device 17 are arranged on a base 18. The base 18 includes a supporting frame 181, a plurality of supporting plates 182 and a working ladder 183. As shown in Figure 3, in order to make the transportation of minerals in the microwave cavity 11 smoother, the support frame 181 is set to have an inclination angle with the ground, and is inclined downward from the inlet 111 to the outlet 112. In this way, in addition to the conveying member 13 pushing the minerals from the feed port 111 of the microwave cavity 11 toward the discharge port 112, the minerals can also be conveyed from the feed port 111 to the discharge port 112 by gravity by using the inclined support frame 181 . As shown in Figures 1 and 2, the carrying plate 182 is arranged between the microwave cavity 11 and the transformer device 16 and on both sides of the driving device 17. The work ladder 183 is erected on one side of the support frame 181, and the operator can Climb to the carrying board 182 via the work ladder 183 for maintenance or operation.

As shown in Figure 5, after the mineral pellets are put into the hopper 113, they are guided by the hopper 113 and enter the microwave cavity 11 through the inlet 111, and the conveying member 13 arranged in the microwave cavity 11 pushes the mineral material The particles advance along the axial direction. At this time, the microwave generating member 12 generates microwaves and emits the microwaves into the microwave cavity 11 to irradiate the mineral material particles. The water molecules in the mineral grains are rotated by microwaves to cause the mineral molecules to oscillate, thereby increasing the temperature of the mineral grains. As the temperature rises, part of the water and dust of mineral particles rises and is suspended in the microwave cavity 11. The airflow generated by the airflow generating member 117 in the microwave cavity 11 passes water vapor and dust through the exhaust port 116. discharge. After the mineral grains are irradiated by microwave, the mineral grains will not only reduce the water content, but also make the structure of the mineral grains looser, reduce the viscosity of the mineral grains, and crack the mineral grains into smaller particle sizes. Small pellets.

As shown in FIG. 7, the microwave generating element 12 of this embodiment is a magnetron, which uses a cooling module 19 to cool the anode of the magnetron. The cooling module 19 of this embodiment is water-cooled and includes a water inlet pipe 191 and a drain pipe 192. The water inlet pipe 191 and the drain pipe 192 are provided with a plurality of auxiliary pipes 193, and each auxiliary pipe 193 is provided with a valve body 194 and passes through A hose 195 is connected to the microwave generating member 12, and the auxiliary pipe 193, the valve body 194 and the hose 195 constitute an inlet connection pipe 196 and an outlet connection pipe 197. The anode of the microwave generating element 12 is surrounded by a water jacket. The cooling water passes through the water jacket from the water inlet pipe 191 through the water inlet connection pipe 196, and absorbs the heat generated by the anode. Pipe 192. This achieves the effect of dissipating heat from the anode of the microwave generating element 12. The cooling module 19 is not limited to a water-cooled structure, but may also be an air-cooled structure. The air-cooled structure is to install heat dissipation fins on the anode of the microwave generating element 12, and then introduce airflow through the heat dissipation fins to achieve the effect of heat dissipation. .

Figure 8 shows another embodiment of the first microwave mixing device or the second microwave mixing device of this creation. In this embodiment, the microwave generating elements 12 are arranged in a staggered arrangement on the microwave cavity 11.

Figure 9 shows another embodiment of the first microwave mixing device or the second microwave mixing device of this invention. In this embodiment, the microwave generating elements 12 are arranged closer (with smaller spacing) on the rectangular metal plate near the top of the microwave cavity 11, and the microwave generating elements 12 are arranged on the rectangular metal plate near the bottom of the microwave cavity 11. The upper arrangement is more evacuated (larger spacing).

Please refer to Figure 10, Figure 11, Figure 14, and Figure 15, which are an embodiment of the mineral water removal equipment created. The mineral water removal equipment 100 of the present invention includes a mineral crushing device 20, a first microwave mixing device 30, and a rotary furnace 40. The mineral water removal equipment of this embodiment is suitable for ore soils with high viscosity and high water content (latite bauxite, nickel earth ore). The minerals excavated from the mine have a water content of 30% to 35%.

The minerals are transported to the mineral pulverizing device 20, which includes a pulverizing member, and the pulverizing member cuts the minerals so that the particle size of the mineral before entering the mineral pulverizing device 20 is greater than the particle size of the mineral after it leaves the mineral pulverizing device 20. In this embodiment, the mineral crushing device 20 is a crusher, which may be a single-shaft, double-shaft or four-shaft crusher. After the minerals are chopped by the mineral pulverizing device 20, granules with a particle size of less than 20 cm are formed, and they are uniformly discharged and transported to the first microwave mixing device 30.

The first microwave mixing device 30 may be a microwave mixing device as shown in Figs. 1-9. The first microwave mixing device 30 includes a first microwave cavity (such as the aforementioned microwave cavity 11), a first conveying member (such as the aforementioned conveying member 13), and a plurality of first microwave generating members (such as the aforementioned microwave generating member). Part 12), the first microwave generating parts generate microwaves and emit them into the first microwave cavity, and the output power of the first microwave mixing device is in the range of 100 thousand watts to 140 thousand watts. The first conveying member is arranged in the first microwave cavity and conveys the minerals from the inlet of the first microwave cavity to the outlet. The first microwave mixing device 30 is for minerals passing through the first microwave mixing device 30, which can remove part of the water by raising the temperature of the mineral by microwave, so that the water content is slightly reduced to 31%, and the bond of crystal water is broken. However, the viscosity of the mineral is destroyed, the organic matter in the mineral soil is decomposed and no longer intertwined, and the particle size of the mineral is reduced. When the mineral is output through the first microwave mixing device 30, it forms particles with a particle size of less than 4 cm.

As shown in Figures 11 and 13, the rotary furnace 40 includes a rotary furnace body 41 and a heater 42. Minerals enter the rotary furnace body 41 and rotate with the rotary furnace body 41. The heater 42 is located on the rotary furnace body 41. The internal mineral heating. There is a roller 43 below the rotating furnace body 41, the roller 43 is driven to rotate by a motor, and the rotating furnace body 41 is supported by the roller 43 and rotates with the roller 43. The roller 43 is arranged on a base 44, and the base 44 is arranged to have an inclination angle with respect to the ground, so that the minerals can move in the rotating furnace body 41 by gravity to achieve the transport function. The height of the inlet 411 of the rotary furnace body 41 with respect to the ground is greater than the height of the outlet 412 of the rotary furnace body 41 with respect to the ground. The heater 42 is a diesel combustion engine and is arranged at the end of the rotary furnace body 41. The heater 42 generates a flame in the rotary furnace body 41 and heats the minerals moving in the rotary furnace body 41 to 430 ^o C to 470 ^o C In order to remove the water content of the minerals, the minerals will pass through the rotary furnace 40 to form particles with a water content in the range of 12% to 17% and a mineral particle size of less than 1.5 cm. Fig. 12 is a graph of the temperature of the rotary furnace 40 and the distance between the inlet 411 of the embodiment. It can be seen from Figure 12 that the temperature in the middle part of the rotary furnace 40 is the highest, exceeding 700 degrees Celsius, and the temperature at the inlet 411 and the outlet 412 is the lowest, between 200 degrees and 300 degrees Celsius.

As shown in Figures 10 and 14, the mineral water removal equipment 100 of this creation also includes a second microwave mixing device 50, and the mineral particles processed by the first microwave mixing device 30 are transported to the second microwave mixing device. The device 50 and the second microwave mixing device 50 can be the microwave mixing device shown in Figs. 1-11. The second microwave mixing device 50 includes a second microwave cavity (such as the aforementioned microwave cavity 11), a second conveying member (such as the aforementioned conveying member 13), and a plurality of second microwave generating members (such as the aforementioned microwave generating member) 12) The second microwave generating elements generate microwaves and emit them into the second microwave cavity, and the output power of the second microwave mixing device is in the range of 60 thousand watts to 100 thousand watts. The second conveying member is arranged in the second microwave cavity and conveys the minerals from the inlet of the second microwave cavity to the outlet. The second microwave mixing device 50 is for minerals passing through the second microwave mixing device 50. The temperature of the minerals can be increased by microwave to remove part of the water again, so that the water content is slightly reduced to 30%, and the crystal water is interrupted. The bond breaks the viscosity of the minerals and reduces the particle size of the minerals. When the minerals are output through the second microwave mixing device 50, they form particles with a particle size of less than 4 cm. After the minerals are irradiated with microwaves through the second microwave mixing device 50, they are transported to the above-mentioned rotary furnace 40.

其中E _w為 蒸發速率(mm/day)，Δ為飽和蒸汽壓與溫度關係的斜率，R _n為淨輻射(W/m ²)，γ為乾溼表常數(kPa/˚C)，u _w為風速(km/hr)，e _aw為土體表面蒸氣壓(mm-Hg)，A為空氣相對溼度的倒數，B為土體表面相對溼度的倒數。 The coupled model of soil moisture evaporation rate is shown in the following two relations:

Where E _w is the evaporation rate (mm/day), Δ is the slope of the relationship between saturated vapor pressure and temperature, R _n is the net radiation (W/m ² ), γ is the wet and dry gauge constant (kPa/˚C), u _w Is the wind speed (km/hr), e _aw is the vapor pressure of the soil surface (mm-Hg), A is the reciprocal of the relative humidity of the air, and B is the reciprocal of the relative humidity of the soil.

When the mineral water removal equipment 100 of this creation processes the minerals at each stage of the device, the theoretical value of the water content of the mineral at each stage (the data calculated using the above-mentioned soil moisture evaporation rate coupling model) and the experimental value ( The comparison of the actual data at the time of implementation is as follows:

Figure 15 shows another embodiment of the mineral water removal equipment 100 of this creation. This embodiment has partly the same structure as the embodiment in FIG. 15, and the same elements are given the same symbols and their descriptions are omitted. The difference between this embodiment and the embodiment in Fig. 15 is that this embodiment further includes a feeding device 60 and a conveying device 70. The minerals are fed into the feeding device 60 by an excavator to avoid directly feeding the minerals into the mineral crushing device 20. And cause an impact on the equipment. The mineral is transported from the feeding device 60 to the mineral crushing device 20. In this embodiment, the feeding device 60 may be a vibrating feeder, and the conveying device 70 may be a conveyor belt, and the minerals heated by the rotary furnace 40 are conveyed to a conveying device 80, such as a cargo ship or truck, via the conveying device 70.

The microwave mixing device created by this invention generates microwaves and irradiates the minerals, reduces the viscosity of the mineral soil, further refines the minerals, and loosens the structure of the minerals. On the one hand, the total surface area of the mineral soil is increased, and on the other hand, the mineral is weakened. The soil's ability to retain moisture increases the heating area of the mineral during the subsequent heating process of the rotary furnace, and the moisture is easily separated from the mineral soil, which makes the moisture in the mineral easy to evaporate and greatly reduces the water content.

However, the above are only the preferred embodiments of this creation, and should not be used to limit the scope of implementation of this creation, that is, simple equivalent changes and modifications made according to the scope of patent application and new description of this creation, All are still within the scope of this creation patent. In addition, any embodiment of the creation or the scope of the patent application does not have to achieve all the purposes or advantages or features disclosed in the creation. In addition, the abstract part and title are only used to assist the search of patent documents, not to limit the scope of rights of this creation. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name the element (element) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. Upper or lower limit.

10: Microwave mixing device 11: Microwave cavity 12: Microwave generator 13: Conveying parts 16: Transformer 17: Drive 18: Pedestal 19: Cooling module 20: Mineral crushing device 30: The first microwave mixing device 40: Rotary furnace 41: Rotating furnace body 42: heater 43: scroll wheel 44: Pedestal 50: The second microwave mixing device 60: Feeding device 70: Conveying device 80: Transport equipment 100: Mineral water removal equipment 111: Inlet 112: Outlet 113: Feed hopper 115: air inlet 116: exhaust port 117: Airflow generator 131: Shaft 132: Spiral plate 181: support frame 182: Carrier Board 183: Work Ladder 191: Inlet pipe 192: Drain pipe 193: Deputy Manager 194: Valve body 195: hose 196: Inlet connection pipe 197: Outlet connection pipe 411: Inlet 412: Outlet B: Bearing

Figure 1 is a perspective view of an embodiment of the first microwave mixing device or the second microwave mixing device created. Figure 2 is a top view of the first microwave mixing device or the second microwave mixing device of Figure 1. Figure 3 is a front view of the first microwave mixing device or the second microwave mixing device of Figure 1. Figure 4 is a cross-sectional view of the first microwave mixing device or the second microwave mixing device of Figure 1. Figure 5 is a schematic diagram of the microwave mixing treatment of minerals by the first microwave mixing device or the second microwave mixing device shown in Figure 1. Figure 6 is a rear view of the first microwave mixing device or the second microwave mixing device of Figure 1. Fig. 7 is an enlarged view of the microwave generating element of the first microwave mixing device or the second microwave mixing device of Fig. 1. Figure 8 is a cross-sectional view of another embodiment of the first microwave mixing device or the second microwave mixing device. Figure 9 is a cross-sectional view of still another embodiment of the first microwave mixing device or the second microwave mixing device. Figure 10 is a schematic diagram of an embodiment of the created mineral water removal equipment. Fig. 11 is a schematic diagram of an embodiment of the rotary furnace of the mineral water removal equipment of Fig. 10. Figure 12 is a graph of the distance between the inside of the rotary furnace and the feed port and the temperature in Figure 11. Fig. 13 and Fig. 10 are schematic diagrams of the heating treatment of minerals in the rotary furnace of the mineral water removal equipment. Figure 14 is a schematic diagram of an embodiment of the dewatering process of minerals through the mineral dewatering equipment created by this invention. Figure 15 is a schematic diagram of another embodiment of the mineral water removal process through the mineral water removal equipment created by this invention.

10: Microwave mixing device

11: Microwave cavity

12: Microwave generator

16: Transformer

17: Drive

18: Pedestal

113: Feed hopper

116: exhaust port

181: support frame

182: Carrier Board

183: Work Ladder

B: Bearing

Claims (12)

A microwave mixing device for irradiating a mineral with microwaves. The microwave mixing device (10) includes: A microwave cavity (11), which has an inlet (111) and an outlet (112); A plurality of microwave generating elements (12) are arranged in the microwave cavity (11), each of the microwave generating elements (12) has a microwave emitting end, and the microwave emitting end is arranged in the microwave cavity (11), and Emit microwaves into the microwave cavity (11); A conveying member (13) is arranged in the microwave cavity (11), and has a shaft (131) and a spiral plate (132). The spiral plate (132) is arranged on the shaft (131), and the shaft The body (131) extends from the inlet (111) toward the outlet (112); and A driving device (17) connected to the shaft body (131) and driving the shaft body (131) to rotate; The rotation of the shaft (131) drives the spiral plate (132) to rotate, the spiral plate (132) moves the mineral from the inlet (111) to the outlet (112), and the microwave generating member ( 12) The generated microwave is irradiated to the mineral. The microwave mixing device according to claim 1, wherein the microwave cavity (11) is formed by a plurality of rectangular plates connected in pairs to form a polyhedron with multiple surfaces, and part of the rectangular plates has a plurality of In the holes, the microwave generating parts (12) are arranged in the holes, and the microwave generating parts (12) are arranged in a plurality of rows along the extending direction of the shaft (131) of the conveying part (13). The microwave mixing device according to claim 2, wherein the number of the microwave generating elements (12) on each surface of the microwave cavity (11) is equal. The microwave mixing device according to claim 3, wherein the microwave generating elements (12) in two adjacent rows are aligned with each other. The microwave mixing device according to claim 3, wherein the microwave generating elements (12) in two adjacent rows are arranged in a staggered manner. The microwave mixing device according to claim 2, wherein the number of the microwave generating elements (12) on the surface of the top of the microwave cavity (11) is greater than the number of the microwave generating elements (12) on the other surface quantity. The microwave mixing device according to claim 2, wherein the microwave generating elements (12) are arranged within an angle range of 180 degrees on the upper half of the microwave cavity (11). The microwave mixing device according to claim 1, which further includes a cooling module (19), which includes an inlet pipe (191), a drain pipe (192), a plurality of inlet connecting pipes (196), and a plurality of A water outlet connection pipe (197), the water inlet connection pipes (196) and a plurality of water outlet connection pipes (197) are respectively connected to the microwave generating elements (12), and the cooling water passes from the water inlet pipe (191) through the The water inlet connecting pipes (196) respectively enter the microwave generating parts (12), and the cooling water enters the drain pipe (192) from the microwave generating parts (12) through the water outlet connecting pipes (197). The microwave mixing device according to claim 1, which further includes a base (18), the base (18) includes a support frame (181), the support frame (181) is set to have an inclination angle with the ground The microwave cavity (11) is arranged on the support frame (181), so that the microwave cavity (11) inclines downward from the feed port (111) to the discharge port (112). The microwave mixing device according to claim 9, wherein the base (18) further includes a plurality of supporting plates (182) and a work ladder (183), and the supporting plates (182) are arranged on the supporting frame (181). ) And located on one side of the microwave cavity (11) and both sides of the driving device (17), and the work ladder (183) is erected on one side of the support frame (181). The microwave mixing device according to claim 1, which further includes a voltage transformation device (16) electrically connected to a power source and the microwave generating elements (12), and the voltage transformation device (16) The voltage is converted into the voltage at which the microwave generating element (12) acts. The microwave mixing device according to claim 1, wherein the microwave generating element (12) is a magnetron.

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