A method for using a sample preparation and drying device for sticky and wet mineral products

Abstract

The invention relates to a method for using a sample preparation and drying device for viscous and wet mineral products, and the steps are as follows: starting a cycloidal pin reducer, opening a barrel cover, and adding a viscous and wet mineral product sample to be tested into a stainless steel inner cylinder; closing the barrel cover, starting a dehumidifying fan, a heating fan and a heater, a spiral auger disk pushes the sample to a stirring rod for stirring, the heating fan sends hot air to the sample, the dehumidifying fan extracts moisture in the stainless steel inner cylinder, and blows it into the sample in the stainless steel inner cylinder through the heater for drying and stirring; starting a motor, closing the heater, and reversely starting the cycloidal pin reducer, the spiral auger disk pushes the mixed material to a square discharge port I position; rotating a hand wheel, a plug plate is pulled out from the plug plate port, and the sample is discharged into a discharge pipe of an auger assembly; the motor drives the auger blades with a shaft to roughly crush the entered sample and transmit it to a feed port of a crusher in the next process; the invention achieves an integrated structure of stirring, drying and crushing and a fully automated implementation method.

Description

Technical Field

[0001] The invention relates to a method for using a sample preparation and drying device for a sticky and wet mineral product, and is a device and a process method for preparing and drying a sample of a mineral product with high humidity, high viscosity and uneven particle size distribution. Background Art

[0002] Currently, with the increasing advancement of metal smelting technology in recent years, mineral products of different grades can be fully utilized.

[0003] At present, various metal processing units have imported a large number of low-grade, high-humidity and high-viscosity mineral products from the international market. The current sample preparation and analysis method for such mineral products still uses the traditional model. After the samples are collected, they are mixed and reduced, and the analysis samples are obtained by static drying.

[0004] In our daily work, we found that the current sample preparation process has the following technical defects:

[0005] 1. When using a drying box for static drying, the internal samples always remain stationary, and the drying process often requires manual intervention.

[0006] 2. The drying box relies on heat conduction for heating, which has low heating efficiency and makes it difficult to carry out effective heat exchange in a relatively closed environment.

[0007] 3. In order to improve the drying efficiency, the only way is to increase the drying air volume or increase the temperature, which will inevitably increase the energy consumption of the blast and waste energy.

[0008] 4. The drying process of the sample is slow, and manual stirring and turning of the material are required to accelerate the drying process, which not only wastes manpower but also easily causes safety accidents.

[0009] 5. After drying, the sample tends to form coagulated soil blocks with high hardness and large particle size. It cannot be directly put into the crusher and still needs to be broken manually. Summary of the invention

[0010] In view of the current state of technology and its shortcomings, my country has increased its research efforts on improving the sampling methods for wet and sticky mineral products in recent years, increased policy investment in the research and development of sample preparation equipment, and achieved good results. At the end of 2017, the Science and Technology Department of the General Administration of Customs (formerly the General Administration of Quality Supervision, Inspection and Quarantine) approved the science and technology project entitled "Improvement and Research and Development of Sample Preparation Equipment for Wet and Sticky Mineral Products" (Project No.: 2017IK119), which effectively required greater efforts to improve the sample preparation process for wet and sticky minerals.

[0011] After receiving the project, we developed a device and experimental method for mixing, drying and crushing sticky and wet mineral products, that is, a method for using a sample preparation and drying device for sticky and wet mineral products.

[0012] The device and method realize full-process mechanical automatic sample preparation through the organic combination of five steps of stirring, drying, discharging, and coarse crushing and then entering into reduction, and can obtain a rough sample of an analytical sample that meets the standards.

[0013] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a method for using a sample preparation and drying device for sticky and wet mineral products, characterized in that: the sample preparation and drying device comprises a barrel cover, a stirring assembly, a stainless steel inner cylinder, a gas-heating layer intermediate cylinder, a steel outer cylinder, a thermal insulation layer, a lower flange, a plug assembly, a connecting device, a cycloid reducer, a temperature detector, a humidity detector, a hinge, an upper flange, a dehumidifying fan, a bearing I, a heating fan, a heater, an augers assembly, and a bracket;

[0014] The barrel cover is round in shape, and a curved wind blocking plate is provided on the inner surface of the barrel cover;

[0015] The upper flange is annular, and a sealing ring groove is provided on the upper flange surface;

[0016] The lower flange is circular in shape, and a stirring shaft hole and a square discharge port I are provided on the inner surface of the lower flange, and a circle of vertical walls is provided along the outer periphery of the stirring shaft hole;

[0017] The stirring assembly includes a stirring shaft, a sleeve, a stirring rod, a scraper, a spiral auger disc, and a keyboard;

[0018] Several layers of stirring rod groups are arranged at intervals along the axial direction of the sleeve, each stirring rod group consists of four stirring rods, the four stirring rods are in a cross-shaped structure, each stirring rod is tilted downward, two connecting columns are welded on the sleeve, scrapers are welded at the outer ends of the two connecting columns, a circular convex plate is welded at the lower end of the sleeve, the circular convex plate mouth is arranged downward, a spiral auger plate is welded on the sleeve between the circular convex plate and the bottom stirring rod group, one end of the stirring shaft is inserted into the sleeve and tightly matched with the sleeve, the keyboard buckle is installed on the upper end surface of the sleeve, the convex key of the keyboard is inserted into the blind key groove at the upper end of the stirring shaft, and the keyboard is fixed to the stirring shaft by bolts;

[0019] The plug plate assembly includes a hand wheel, a U-shaped seat I, a U-shaped seat II, an L-shaped slideway, a lead screw, a lead screw nut, and a plug plate. The two vertical walls of the U-shaped seat II are fixed to one end surface of the two vertical walls of the U-shaped seat I. An L-shaped slideway is welded to the other end surface of the two vertical walls of the U-shaped seat I. The shaft of the hand wheel passes through the shaft hole of the horizontal wall of the U-shaped seat II and is fixed to one end of the lead screw. The plug plate is arranged on the two L-shaped slideways. The other end of the lead screw is screwed to the lead screw nut fixed to the bottom surface of the plug plate. The hand wheel is rotated counterclockwise or clockwise, and the plug plate moves forward and backward on the two L-shaped slideways through the cooperation of the lead screw and the lead screw nut.

[0020] The auger assembly includes a motor, a connecting device, a discharge pipe, and an auger blade with a shaft. The connecting device is connected to the motor and the discharge pipe respectively. The shaft of the auger blade with a shaft passes through two bearings II of the connecting device and is connected to the motor shaft. The auger blade is arranged below the square feed port II in the discharge pipe. The square feed port II is square, and the upper end of the square feed port II is a plug port.

[0021] The stainless steel inner cylinder, the gas-heating layer intermediate cylinder and the steel outer cylinder are sequentially mounted together, the upper ends thereof are fixed to the upper flange, the lower ends are fixed to the lower flange, the lower flange is fixed to the bracket, a thermal insulation layer is filled between the steel outer cylinder and the gas-heating layer intermediate cylinder, a sealing ring is provided in the sealing ring groove of the upper flange, one end of the air outlet pipe is sequentially passed through the steel outer cylinder air outlet, the thermal insulation layer, the gas-heating layer intermediate cylinder air outlet and the stainless steel inner cylinder air outlet and fixed, one end of the air inlet pipe is sequentially passed through the steel outer cylinder air inlet, the thermal insulation layer and the gas-heating layer intermediate cylinder air inlet and fixed, the other end of the air outlet pipe is respectively connected to the dehumidifying fan and the heater through a tee, one end of the heater is connected to the other end of the air inlet pipe, and the other end of the heater is connected to the heating fan;

[0022] One end of the connecting device is fixed to the lower flange, and the other end of the connecting device is fixed to the cycloid reducer;

[0023] The stirring assembly is arranged in the stainless steel inner cylinder, the stirring shaft of the stirring assembly passes through the stirring shaft hole of the lower flange, the two bearings I of the connecting device and are connected with the reducer shaft of the cycloid reducer in sequence, the circular convex plate of the stirring assembly is buckled outside a circle of vertical walls of the lower flange, the circular convex plate is respectively matched with a circle of vertical walls and the outer lower flange surface, and the scraper of the stirring assembly is matched with the inner surface of the stainless steel inner cylinder;

[0024] The plug assembly and the auger assembly are respectively fixed on the lower flange, the square feed port II of the auger assembly discharge pipe is arranged correspondingly to the square discharge port I of the lower flange, and the plug of the plug assembly is inserted into the plug port and arranged between the square feed port II and the square discharge port I;

[0025] The temperature probe and humidity probe are respectively passed through the steel outer cylinder, the insulation layer, and the gas-heat layer intermediate cylinder and placed in the stainless steel inner cylinder;

[0026] The barrel cover is connected to the upper flange through a hinge, and the barrel cover is closed, and the curved wind blocking plate fixed on the barrel cover is arranged correspondingly to the air outlet of the stainless steel inner tube;

[0027] The steps for using the sample preparation and drying device are as follows:

[0028] The first step is to add materials, start the cycloid reducer in the forward direction, and the stirring assembly starts to rotate slowly clockwise. Open the barrel cover and add the sticky and wet mineral product sample to be tested into the stainless steel inner barrel;

[0029] The second step is drying. Close the barrel cover, start the dehumidifying fan, heating fan and heater, and accelerate the rotation of the stirring assembly. The spiral auger disk pushes the sticky and wet mineral product sample from the bottom layer of the spiral auger disk to the upper layer of the spiral auger disk until it is pushed to the array stirring rod group. The four stirring rods in each group stir the sticky and wet mineral product sample. During the stirring process of the sticky and wet mineral product sample, the scraper will drop the material adhering to the inner wall of the stainless steel inner barrel. At the same time, the heating fan blows the heated air of the heater into the sticky and wet mineral product sample through the air inlet pipe. At this time, the arc-surface wind resistance plate located at the outlet of the air pipe will hinder the exhaust process to prevent excessive wind force from sucking out too much sample. The dehumidifying fan heats the stainless steel inner cylinder. The moisture generated by heat is extracted through the air outlet pipe and then sent to the heater. The heater dries the moisture in the moisture, and then blows the heated air through the air inlet pipe to the sticky and wet mineral product sample in the stainless steel inner barrel to stir and dry the sticky and wet mineral product sample. When the temperature detected by the temperature probe reaches 85°C, the heating fan, heater and dehumidifying fan are turned off. At this time, the hot air circulation is no longer performed, and only the stirring assembly is used for stirring. As the stirring proceeds, the temperature in the heating barrel will gradually decrease and the moisture will increase. The temperature probe and humidity probe continue to measure the situation in the barrel. When the preset value is reached, the heating fan, heater and dehumidifying fan are turned on again. This process is repeated several times to fully mix the materials in the barrel.

[0030] The third step is to discharge the material. Start the motor, turn off the heater, continue to blow in room temperature air, start the cycloid reducer in reverse, and the stirring assembly rotates counterclockwise. The spiral auger disk pushes the fully mixed material from the upper layer of the spiral auger disk to the lower layer of the spiral auger disk until it is pushed to the square discharge port I position.

[0031] Turn the hand wheel clockwise, and the plug plate is pulled out from the plug plate port through the cooperation of the lead screw and the lead screw nut. The dried mineral product sample is discharged into the discharge pipe of the auger assembly through the square discharge port Ⅰ and the square feed port Ⅱ.

[0032] The fourth step is sample crushing. The motor drives the auger blade with shaft to rotate, and the dried mineral product samples continuously enter the discharge pipe. The auger blade with shaft crushes the dried mineral product samples and transmits them to the feed port of the crusher in the next process to start the crushing and reduction of the samples.

[0033] Step 5: Clean the drying drum, turn off all electrical accessories, open the drying drum cover, and manually clean the remaining samples.

[0034] Compared with the existing operation method, the present invention has the following advantages:

[0035] 1. The equipment has a reasonable structure and better drying effect. Compared with the static drying method of the drying box, the present invention has higher drying efficiency. As the sample is turned and stirred, it can have a larger contact area with the hot air, shortening the drying time, and the drying process does not require manual intervention.

[0036] 2. The drying drum structure design uses a heating method in which hot air directly contacts the sample material, discharges low-temperature moisture through a dehumidifying fan system, and uses an insulation layer to maintain a high-temperature dry environment in the drum, thereby improving the comprehensive utilization rate of heat.

[0037] 3. The present invention is designed with a temperature and humidity sensor, which can automatically stop heating and air supply when the temperature or humidity in the drying drum reaches a certain limit value, thereby saving energy to the maximum extent.

[0038] 4. The present invention uses a stirring assembly to drive the sample to turn over during the drying process so as to fully mix it, which not only improves the uniformity of sample stirring, but also minimizes the occurrence of safety accidents and saves human resources.

[0039] 5. After the sample is stirred and dried, the present invention can realize a rough crushing process through the augers and directly enter the crusher of the next process, thus saving manpower to a great extent.

[0040] In conclusion, the present invention realizes an integrated structure of stirring, drying and coarse crushing and a fully automated control process, and can obtain a crude sample of an analytical sample that meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the present invention;

[0042] Figure 2 for Figure 1 A magnified view of structure B;

[0043] Figure 3 for Figure 1 AA section view of the structure;

[0044] Figure 4 is a side cross-sectional view of the present invention;

[0045] Figure 5 It is a structural schematic diagram of the stirring assembly of the present invention;

[0046] Figure 6 It is a structural schematic diagram of the spiral auger disc of the present invention;

[0047] Figure 7 It is a structural schematic diagram of the keyboard of the present invention;

[0048] Figure 8 for Figure 7 A top view of

[0049] Fig. 9 It is a structural schematic diagram of the auger assembly of the present invention;

[0050] Fig.10 for Fig. 9 Rear view of

[0051] Fig.11 It is a structural schematic diagram of the plug board assembly of the present invention;

[0052] Fig.12 for Fig.11 A top view of

[0053] Fig.13 for Fig.11 Side view of

[0054] Fig.14 It is a schematic diagram of the structure of the upper flange of the present invention;

[0055] Fig.15 It is a schematic structural diagram of the lower flange of the present invention. DETAILED DESCRIPTION

[0056] like Figures 1 to 15 As shown, a sample preparation and drying device for sticky and wet mineral products includes a barrel cover 1, a stirring assembly 2, a stainless steel inner cylinder 3, an air-heating layer intermediate cylinder 4, a steel outer cylinder 5, an insulation layer 6, a lower flange 7, a plug assembly 8, a connecting device 9, a cycloid reducer 10, a temperature probe 11, a humidity probe 12, a hinge 13, an upper flange 14, a dehumidifying fan 15, a bearing I 16, a heating fan 17, a heater 18, an augers assembly 19, and a bracket 20.

[0057] The barrel cover 1 is circular in shape, and a wind shield 1 - 1 is arranged on the inner surface of the barrel cover 1 .

[0058] The upper flange 14 is annular, and a sealing ring groove 14 - 1 is provided on the surface of the upper flange 14 .

[0059] The lower flange 7 is circular in shape, and a stirring shaft hole 7-1 and a square discharge port I 7-2 are provided on the inner surface of the lower flange 7, and a circle of vertical walls 7-3 are provided along the outer periphery of the stirring shaft hole 7-1.

[0060] The stirring assembly 2 includes a stirring shaft 2-1, a sleeve 2-2, a stirring rod 2-3, a scraper 2-4, a spiral auger disc 2-5, and a keyboard 2-6;

[0061] Several layers of stirring rod groups are welded at intervals along the axial direction of the sleeve 2-2, and each stirring rod group consists of four stirring rods 2-3. The four stirring rods 2-3 are in a cross-shaped structure, and each stirring rod 2-3 is inclined downward. Two connecting columns 2-7 are welded on the sleeve 2-2, and scrapers 2-4 are welded at the outer ends of the two connecting columns 2-7. A circular convex disk 2-8 is welded at the lower end of the sleeve 2-2, and the circular convex disk 2-8 is set downward. A spiral auger disk 2-5 is welded on the sleeve 2-2 between the circular convex disk 2-8 and the bottom layer of stirring rod groups. One end of the stirring shaft 2-1 is inserted into the sleeve 2-2 and tightly fits with the sleeve 2-2. The keyboard 2-6 is buckled on the upper end surface of the sleeve 2-2, and the convex key 2-6-1 of the keyboard 2-6 is inserted into the blind key groove at the upper end of the stirring shaft 2-1. The keyboard 2-6 is fixed to the stirring shaft 2-1 by bolts.

[0062] The plug plate assembly 8 includes a hand wheel 8-1, a U-shaped seat I 8-2, a U-shaped seat II 8-3, an L-shaped slideway 8-4, a lead screw 8-5, a lead screw nut 8-6, and a plug plate 8-7;

[0063] The two vertical walls of the U-shaped seat II 8-3 are welded and fixed to one end face of the two vertical walls of the U-shaped seat I 8-2, and an L-shaped slideway 8-4 is welded to the other end face of the two vertical walls of the U-shaped seat I 8-2 respectively. The axis of the handwheel 8-1 passes through the axial hole of the horizontal wall of the U-shaped seat II 8-3 and is fixed to one end of the screw 8-5. The plug plate 8-7 is arranged on the two L-shaped slideways 8-4, and the other end of the screw 8-5 is screwed to the screw nut 8-6 fixed on the bottom surface of the plug plate 8-7. The handwheel 8-1 is rotated counterclockwise or clockwise, and the plug plate 8-7 moves back and forth on the two L-shaped slideways 8-4 through the cooperation of the screw 8-5 and the screw nut 8-6.

[0064] The auger assembly 19 includes a motor 19-1, a connecting device 19-2, a discharge pipe 19-3, and an auger blade 19-4 with a shaft;

[0065] The connecting device 19-2 is connected to the motor 19-1 and the discharge pipe 19-3 by bolts respectively. The shaft of the auger blade 19-4 with an axis passes through the two bearings Ⅱ19-5 of the connecting device 19-2 and is connected to the shaft of the motor 19-1. The auger blade is arranged below the square feed port Ⅱ19-3-1 in the discharge pipe 19-3. The square feed port Ⅱ19-3-1 is square, and the upper end of the square feed port Ⅱ19-3-1 is a plug port 19-3-2.

[0066] The stainless steel inner tube 3, the gas heating layer intermediate tube 4 and the steel outer tube 5 are all annular, and air outlets are correspondingly provided at the upper ends of the stainless steel inner tube 3, the gas heating layer intermediate tube 4 and the steel outer tube 5, and air inlet ports are correspondingly provided at the lower ends of the gas heating layer intermediate tube 4 and the steel outer tube 5.

[0067] The stainless steel inner tube 3, the gas-heating layer intermediate tube 4 and the steel outer tube 5 are sequentially assembled together, and the upper ends thereof are welded and fixed to the upper flange 14, and the lower ends are welded and fixed to the lower flange 7, and the lower flange 7 is welded and fixed to the bracket 20. A thermal insulation layer 6 is filled between the steel outer tube 5 and the gas-heating layer intermediate tube 4, and a sealing ring 23 is provided in the sealing ring groove 14-1 of the upper flange 14. One end of the air outlet pipe 21 is sequentially passed through the air outlet port of the steel outer tube 5, the thermal insulation layer 6, the air outlet port of the gas-heating layer intermediate tube 4 and the air outlet port of the stainless steel inner tube 3, and welded and fixed. One end of the air inlet pipe 22 is sequentially passed through the air inlet port of the steel outer tube 5, the thermal insulation layer 6 and the air inlet port of the gas-heating layer intermediate tube 4, and welded and fixed. The other end of the air outlet pipe 21 is respectively connected to the dehumidifying fan 15 and the heater 18 through a tee, one end of the heater 18 is connected to the other end of the air inlet pipe 22, and the other end of the heater 18 is connected to the heating fan 17.

[0068] One end of the connecting device 9 is fixed to the lower flange 7 by bolts, and the other end of the connecting device 9 is fixed to the cycloid reducer 10 by bolts. The stirring assembly 2 is set in the stainless steel inner tube 3. The stirring shaft 2-1 of the stirring assembly 2 passes through the stirring shaft hole 7-1 of the lower flange 7 in sequence. The two bearings Ⅰ16 of the connecting device 9 are connected to the reducer shaft of the cycloid reducer 10. The circular convex plate 2-8 of the stirring assembly 2 is buckled on the outside of a circle of vertical walls 7-3 of the lower flange 7. The circular convex plate 2-8 is respectively matched with a circle of vertical walls 7-3 and the outer lower flange 7 surface clearance. The scraper 2-4 of the stirring assembly 2 is matched with the inner surface clearance of the stainless steel inner tube 3. The plug assembly 8 is passed through the U-shaped seat Ⅰ8- 2 is welded on the lower flange 7, the square feed port II 19-3-1 of the auger assembly 19 is welded with the square discharge port I 7-2 of the lower flange 7, the plug assembly 8 is fixed on the lower flange 7, the plug 8-7 of the plug assembly 8 is inserted into the plug port 19-3-2 and arranged between the square feed port II 19-3-1 and the square discharge port I 7-2; the temperature detection head 11 and the humidity detection head 12 are respectively passed through the steel outer cylinder 5, the insulation layer 6, and the gas heat layer intermediate cylinder 4 and placed in the stainless steel inner cylinder 3; the barrel cover 1 is connected to the upper flange 14 through the hinge 13, and the barrel cover 1 is covered, and the arc wind blocking plate 1-1 fixed on the barrel cover 1 is arranged correspondingly to the air outlet of the stainless steel inner cylinder 3.

[0069] The gas-heat layer intermediate cylinder 4 is made of stainless steel.

[0070] A method for using a sample preparation and drying device for sticky and wet mineral products, the steps are as follows:

[0071] The first step is to add materials, start the cycloid reducer 10 in the forward direction, and the stirring assembly 2 starts to rotate slowly clockwise. The barrel cover 1 is opened and the viscous and wet mineral product sample to be tested is added into the stainless steel inner barrel 3;

[0072] The second step is drying. Close the barrel cover 1, start the dehumidifying fan 15, the heating fan 17 and the heater 18, the stirring assembly 2 accelerates the rotation, and the spiral auger disc 2-5 pushes the sticky and wet mineral product sample from the bottom layer of the spiral auger disc 2-5 to the upper layer of the spiral auger disc 2-5 until it is pushed to the array stirring rod group. The four stirring rods 2-3 in each group stir the sticky and wet mineral product sample. During the stirring process of the sticky and wet mineral product sample, the scraper 2-4 will hang down the material adhering to the inner wall of the stainless steel inner barrel 3. At the same time, the heating fan 17 blows the heated air of the heater 18 into the sticky and wet mineral product sample through the air inlet pipe 22. At this time, the arc-surface wind blocking plate 1-1 located at the outlet of the air outlet pipe 21 will hinder the exhaust process to prevent excessive wind force from sucking out too much sample. The dehumidifying fan 15 will The moisture generated by heating in the inner cylinder 3 is extracted through the air outlet pipe 21 and then sent to the heater 18. The heater 18 dries the moisture and blows the heated air to the sticky and wet mineral product sample in the stainless steel inner cylinder 3 through the air inlet pipe 22 again to stir and dry the sticky and wet mineral product sample. When the temperature detected by the temperature probe 11 reaches 85°C, the heating fan 17, the heater 18 and the dehumidifying fan 15 are turned off. At this time, the hot air circulation is no longer performed, and only the stirring assembly 2 is used for stirring. As the stirring proceeds, the temperature in the heating barrel will gradually decrease and the moisture will increase. The temperature probe 11 and the humidity probe 12 continue to measure the situation in the barrel. When the preset value is reached, the heating fan 17, the heater 18 and the dehumidifying fan 15 are turned on again. This process is repeated several times to fully mix the materials in the barrel.

[0073] Step 3: Discharging, start the motor 19-1, turn off the heater 18, continue to blow in room temperature air, reversely start the cycloid reducer 10, the stirring assembly 2 rotates counterclockwise, and the spiral auger disc 2-5 pushes the fully mixed material from the upper layer of the spiral auger disc 2-5 to the lower layer of the spiral auger disc 2-5 until it is pushed to the square discharge port I7-2 position;

[0074] Turn the hand wheel 8-1 clockwise, and through the cooperation of the lead screw 8-5 and the lead screw nut 8-6, the plug plate 8-7 is pulled out from the plug plate port 19-3-2, and the dried mineral product sample is discharged into the discharge pipe 19-3 of the auger assembly 19 through the square discharge port Ⅰ7-2 and the square feed port Ⅱ19-3-1;

[0075] Step 4: Sample crushing: the motor 19-1 drives the auger blade 19-4 with a shaft to rotate, and the dried mineral product samples continuously enter the discharge pipe 19-3, and the dried mineral product samples are roughly crushed by the auger blade 19-4 with a shaft, and transmitted to the feed port of the crusher in the next process, and the sample crushing and reduction begins;

[0076] Step 5: Clean the drying drum, turn off all electrical accessories, open the drying drum cover, and manually clean the remaining samples.

[0077] The present invention can adjust the drying time according to different material properties and feed moisture values, and discharge can begin when the crushing requirements are met. After drying, the drying cylinder and related components must be cleaned, and the next experiment can be carried out after completion.

Claims

1. A method for using a sample preparation and drying device for sticky and wet mineral products, characterized in that: The sample preparation and drying device comprises a barrel cover (1), a stirring assembly (2), a stainless steel inner cylinder (3), an air-heating layer intermediate cylinder (4), a steel outer cylinder (5), an insulation layer (6), a lower flange (7), a plug assembly (8), a connecting device I (9), a cycloidal reducer (10), a temperature probe (11), a humidity probe (12), a hinge (13), an upper flange (14), a dehumidifying fan (15), a bearing I (16), a heating fan (17), a heater (18), an agitator assembly (19), and a bracket (20); The barrel cover (1) is circular in shape, and a curved wind blocking plate (1-1) is provided on the inner surface of the barrel cover (1); The upper flange (14) is annular, and a sealing ring groove (14-1) is provided on the surface of the upper flange (14); The lower flange (7) is circular in shape, and a stirring shaft hole (7-1) and a square discharge port I (7-2) are provided on the inner surface of the lower flange (7), and a circle of vertical walls (7-3) are provided along the outer periphery of the stirring shaft hole (7-1); The stirring assembly (2) comprises a stirring shaft (2-1), a sleeve (2-2), a stirring rod (2-3), a scraper (2-4), a spiral auger disc (2-5), and a keyboard (2-6); Several layers of stirring rod groups are arranged at intervals along the axial direction of the sleeve (2-2), each stirring rod group is composed of four stirring rods (2-3), the four stirring rods (2-3) are in a cross-shaped structure, and each stirring rod (2-3) is inclined downward. Two connecting columns (2-7) are welded to the sleeve (2-2), and scrapers (2-4) are welded to the outer ends of the two connecting columns (2-7). A circular convex disk (2-8) is welded to the lower end of the sleeve (2-2), and the circular convex disk (2-8) is arranged with its mouth facing downward. A spiral auger disc (2-5) is welded on the sleeve (2-2) between the circular convex disc (2-8) and the bottom stirring rod group; one end of the stirring shaft (2-1) is inserted into the sleeve (2-2) and tightly fits with the sleeve (2-2); the keyboard (2-6) is buckled on the upper end surface of the sleeve (2-2); the convex key (2-6-1) of the keyboard (2-6) is inserted into the blind key slot at the upper end of the stirring shaft (2-1); and the keyboard (2-6) is fixed to the stirring shaft (2-1) by bolts; The plug plate assembly (8) comprises a hand wheel (8-1), a U-shaped seat I (8-2), a U-shaped seat II (8-3), an L-shaped slideway (8-4), a lead screw (8-5), a lead screw nut (8-6), and a plug plate (8-7). The two vertical walls of the U-shaped seat II (8-3) are fixed to one end surface of the two vertical walls of the U-shaped seat I (8-2), and an L-shaped slideway (8-4) is welded to the other end surface of the two vertical walls of the U-shaped seat I (8-2). The hand wheel (8-1 ) passes through the shaft hole of the horizontal wall of the U-shaped seat II (8-3) and is fixed to one end of the lead screw (8-5); the insert plate (8-7) is arranged on the two L-shaped slideways (8-4); the other end of the lead screw (8-5) is screwed to the lead screw nut (8-6) fixed to the bottom surface of the insert plate (8-7); the hand wheel (8-1) is rotated counterclockwise or clockwise, and the insert plate (8-7) moves forward and backward on the two L-shaped slideways (8-4) through the cooperation between the lead screw (8-5) and the lead screw nut (8-6); The auger assembly (19) comprises a motor (19-1), a connecting device II (19-2), a discharge pipe (19-3), and an auger blade (19-4) with a shaft, wherein the connecting device II (19-2) is connected to the motor (19-1) and the discharge pipe (19-3) respectively, and the shaft of the auger blade (19-4) passes through two bearings II (19-5) of the connecting device II (19-2) and is connected to the shaft of the motor (19-1), and the auger blade is arranged below a square feed port II (19-3-1) in the discharge pipe (19-3), the square feed port II (19-3-1) is square, and the upper end of the square feed port II (19-3-1) is a plug port (19-3-2); The stainless steel inner cylinder (3), the gas-heating layer intermediate cylinder (4) and the steel outer cylinder (5) are sequentially mounted together, the upper end of which is fixed to the upper flange (14), the lower end is fixed to the lower flange (7), the lower flange (7) is fixed to the bracket (20), an insulation layer (6) is filled between the steel outer cylinder (5) and the gas-heating layer intermediate cylinder (4), a sealing ring (23) is provided in the sealing ring groove (14-1) of the upper flange (14), one end of the air outlet pipe (21) passes through the steel outer cylinder in sequence, The air outlet of the steel outer tube (5), the heat preservation layer (6), the air outlet of the intermediate tube (4) of the gas-heating layer and the air outlet of the stainless steel inner tube (3) are fixed to each other. One end of the air inlet pipe (22) passes through the air inlet of the steel outer tube (5), the heat preservation layer (6) and the air inlet of the intermediate tube (4) of the gas-heating layer in sequence and is fixed thereto. The other end of the air outlet pipe (21) is respectively connected to the dehumidifying fan (15) and the heater (18) through a tee. One end of the heater (18) is connected to the other end of the air inlet pipe (22). The other end of the heater (18) is connected to the Heating fan (17) connection; One end of the connecting device I (9) is fixed to the lower flange (7), and the other end of the connecting device I (9) is fixed to the cycloid reducer (10); The stirring assembly (2) is arranged in the stainless steel inner cylinder (3), and the stirring shaft (2-1) of the stirring assembly (2) passes through the stirring shaft hole (7-1) of the lower flange (7), the two bearings I (16) of the connecting device I (9), and is connected to the reducer shaft of the cycloid reducer (10). The circular convex plate (2-8) of the stirring assembly (2) is buckled onto the outside of a circle of vertical walls (7-3) of the lower flange (7), and the circular convex plate (2-8) is respectively matched with the circle of vertical walls (7-3) and the outer lower flange (7) surface clearance, and the scraper (2-4) of the stirring assembly (2) is matched with the inner surface of the stainless steel inner cylinder (3) clearance; The plug assembly (8) and the agitator assembly (19) are respectively fixed on the lower flange (7); the square feed port II (19-3-1) of the discharge pipe (19-3) of the agitator assembly (19) is arranged correspondingly to the square discharge port I (7-2) of the lower flange (7); the plug plate (8-7) of the plug assembly (8) is inserted into the plug port (19-3-2) and arranged between the square feed port II (19-3-1) and the square discharge port I (7-2); The temperature detection head (11) and the humidity detection head (12) respectively pass through the steel outer cylinder (5), the thermal insulation layer (6), and the gas-heat layer intermediate cylinder (4) and are placed in the stainless steel inner cylinder (3); The barrel cover (1) is connected to the upper flange (14) via a hinge (13), and the barrel cover (1) is closed, and the curved wind blocking plate (1-1) fixed on the barrel cover (1) is arranged at a corresponding interval to the air outlet of the stainless steel inner tube (3); The steps for using the sample preparation and drying device are as follows: The first step is to add materials, start the cycloid reducer (10) in the forward direction, and the stirring assembly (2) starts to rotate slowly clockwise. The barrel cover (1) is opened and the viscous and wet mineral product sample to be tested is added into the stainless steel inner barrel (3); The second step is drying. The barrel cover (1) is closed, and the dehumidifying fan (15), the heating fan (17) and the heater (18) are turned on. The stirring assembly (2) is accelerated to rotate. The spiral auger disc (2-5) pushes the sticky and wet mineral product sample from the bottom layer of the spiral auger disc (2-5) to the upper layer of the spiral auger disc (2-5) until it is pushed to the array stirring rod group. The four stirring rods (2-3) in each group stir the sticky and wet mineral product sample. During the stirring process of the sticky and wet mineral product sample, the scraper (2-4) will drop the material adhering to the inner wall of the stainless steel inner cylinder (3). At the same time, the heating fan (17) blows the heated air of the heater (18) into the sticky and wet mineral product sample through the air inlet pipe (22). At this time, the arc-shaped wind blocking plate (1-1) located at the outlet of the air outlet pipe (21) will hinder the exhaust process to prevent excessive wind force from sucking out too much sample. The dehumidifying fan (15) pushes the stainless steel The moisture generated by heating in the inner cylinder (3) is extracted through the air outlet pipe (21) and then sent to the heater (18). The heater (18) dries the moisture in the moisture and blows the heated air into the viscous mineral product sample in the stainless steel inner cylinder (3) through the air inlet pipe (22) again to stir and dry the viscous mineral product sample. When the temperature detected by the temperature probe (11) reaches 85° C., the heating fan (17), the heater (18) and the dehumidifying fan (15) are turned off. At this time, the hot air circulation is no longer performed, and only the stirring assembly (2) is used for stirring. As the stirring is performed, the temperature in the heating barrel gradually decreases and the moisture increases. The temperature probe (11) and the humidity probe (12) continuously measure the situation in the barrel. When the preset value is reached, the heating fan (17), the heater (18) and the dehumidifying fan (15) are turned on again. This process is repeated several times to fully mix the materials in the barrel. Step 3: Discharging, start the motor (19-1), turn off the heater (18), continue to blow in room temperature air, start the cycloidal reducer (10) in reverse, the stirring assembly (2) rotates counterclockwise, and the spiral auger disc (2-5) pushes the fully mixed material from the upper layer of the spiral auger disc (2-5) to the lower layer of the spiral auger disc (2-5) until it is pushed to the square discharge port I (7-2) position; The hand wheel (8-1) is turned clockwise, and the plug plate (8-7) is pulled out from the plug plate opening (19-3-2) through the cooperation of the lead screw (8-5) and the lead screw nut (8-6), and the dried mineral product sample is discharged into the discharge pipe (19-3) of the auger assembly (19) through the square discharge opening I (7-2) and the square feed opening II (19-3-1); Step 4: Sample crushing: the motor (19-1) drives the auger blade (19-4) with a shaft to rotate, and the dried mineral product samples continuously enter the discharge pipe (19-3). The auger blade (19-4) with a shaft crushes the dried mineral product samples and transmits them to the feed port of the crusher in the next process, and the sample crushing and reduction begins; Step 5: Clean the drying drum, turn off all electrical accessories, open the drying drum cover, and manually clean the remaining samples.

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