A sampling and sample preparation method and device for rich lead

Abstract

The present invention discloses a sampling and sample preparation method and device for rich lead, belonging to the metallurgical field, which includes the following steps: (1) cleaning, (2) drilling for sampling, (3) sample preparation, (4) bagging; before sampling, impurities on the surface of the lead ingot are removed, which can reduce the influence of impurities on the quality of the lead sample during sampling. During the sampling and sample preparation process, defective positions are discarded, making the sampling more spatially representative. Using anhydrous ethanol for cooling can improve the cooling effect and reduce the phenomenon of smoke oxidation caused by frictional heating; during bagging, multiple mixings are required to ensure the consistency of the lead samples packed in different bags, and the integrity of the quality of the entire batch of lead samples can be reflected during the quality inspection process.

Description

Technical Field

[0001] The present invention belongs to the field of metallurgy, and specifically relates to a sampling and sample preparation method and device for rich lead. Background Art

[0002] Rich lead is a multi-metal alloy with lead as the main metal, but containing precious metals such as gold and silver and antimony, copper, and iron. It is obtained through multiple smelting and refining processes at high temperatures in a reverberatory furnace, and then discharged from the furnace after the front-of-furnace analysis reaches a certain standard; during the discharging process, the molten alloy is cast into a regular trapezoid with six faces through a cast iron mold. During the smelting process of rich lead, the chemical components are not evenly distributed, and the ingot temperature is relatively high (about 1000°C). Due to the melting points, densities of its various components and the time difference, there are local differences and uneven distributions in its components. At the same time, there are often voids in the geometric center of the rich lead ingot. Therefore, it is necessary to avoid the defective parts of the ingot during sampling.

[0003] Currently, when sampling lead ingots, the method of collecting drill chips after drilling with a bench drill is still used. Although the bench drill is small in size and convenient to use, when drilling, the cut chips are often thrown everywhere by the drill bit, making it very inconvenient to collect the cut chips; due to the soft texture of lead, the cut chips are in the form of long strips. Therefore, during the sample preparation process, the strip-shaped cut chips also need to be crushed into small particle powder. On the one hand, it is convenient for bagging, and on the other hand, it is more convenient for classification and mixing, and a more accurate assessment of the overall properties of rich lead can be made. The commonly used equipment for refining cut chip particles is a sample mill. After the sample mill separately cuts the cut chips and fully mixes them, they can be bagged and used. Usually, when directly drilled cut chips enter the sample mill, due to the long strip structure of the cut chips, it is easy to block the feeding port. And when the sample mill refines, due to the soft texture and small volume of the lead chips, it takes a lot of time to refine from the strip shape to the powder shape. Therefore, from drilling to collecting drill chips to the process of cutting and refining the cut chips, the sampling and sample preparation time is lengthened and the efficiency is low. Therefore, a sampling device for rich lead is needed to facilitate the collection of cut chips and improve the sample preparation efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems, and provide a sampling and sample preparation method and device for rich lead, which reduces the situation of cut chip scattering, facilitates the collection of cut chips, cuts and refines the cut chips during drilling, and improves the sampling and sample preparation efficiency.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a sampling and sample preparation method for rich lead, including the following steps:

[0006] (1) Cleaning: Clean the impurities on the surface of the lead ingot and clean the tools during sampling;

[0007] (2)Drilling and sampling: Place the cleaned lead ingots on the sampling device, clamp them, and position the drilling. The positioning positions are the non-central points on the diagonal lines of the upper and lower surfaces of the lead ingots. Drill the holes and spray anhydrous ethanol to cool them down. Collect all the drill chips.

[0008] (3)Sample preparation: Feed all the collected drill chips into a sample grinder, gradually grind them into powder, spray anhydrous ethanol to cool them down, pass through a sieve, and gradually mix and divide them to 1300 - 1500 grams. Then feed the obtained powder back into the sample grinder, grind it all in batches, spray anhydrous ethanol to cool it down, and pass through a sieve. Bake all the fine powder for 30 - 35 minutes at a temperature of 70 - 80 °C.

[0009] (4)Bagging: Take out the dried powder, cool it, and after repeated and sufficient mixing and dividing, divide it into several equal parts and bag it in vacuum.

[0010] A sampling device for a sampling and sample preparation method of rich lead, characterized in that: it includes a bracket, a clamping device for fixing the lead ingot is arranged on the bracket, and a drilling device for sampling the lead ingot is arranged above the bracket.

[0011] The drilling device includes a drilling part, and a first cover for enclosing it is arranged outside the drilling part. A connecting sleeve is splined on the drilling part, and a first cutting tool is fixedly arranged at the lower end of the connecting sleeve. A lifting frame that can move up and down following the connecting sleeve is rotatably arranged on the connecting sleeve, and a second cutting tool for cooperating with the first cutting tool to cut off the chips is fixedly arranged at the lower end of the lifting frame.

[0012] As a further improvement of the above technical solution, a second cover is arranged below the first cover, a second hopper is fixedly arranged on the second cover, and a first hopper fixedly connected to the connecting sleeve is rotatably arranged above the second hopper.

[0013] A gap is arranged between the first hopper and the second hopper, and grinding parts are arranged on the lower surface of the first hopper and the upper surface of the second hopper in an alternating manner.

[0014] As a further improvement of the above technical solution, a connecting seat is fixedly arranged between the first cover and the second cover, the connecting sleeve and the second cutting tool are rotatably arranged with each other, the lifting frame and the connecting seat are slidably arranged up and down with each other, and a spring for pushing the connecting sleeve downward is arranged between the connecting sleeve and the connecting seat.

[0015] A number of connecting rods are fixedly installed between the bottom of the connecting sleeve and the first hopper, and the first cutting tool is fixedly installed on the connecting rods.

[0016] As a further improvement of the above technical solution, a plurality of bosses are provided on the upper side of the second hopper, a rotating sleeve is fixedly provided on the boss, the rotating sleeve supports the first hopper, and is rotatably provided with the first hopper.

[0017] As a further improvement of the above technical solution, the drilling member includes a drill pipe and a drill bit, the diameter of the drill bit is larger than the diameter of the drill pipe, and the top of the drill pipe is connected with a driving source for driving its rotation and a lifting device for pushing it up and down.

[0018] As a further improvement of the above technical solution, a cooling pipeline is provided on the first cover, the cooling pipeline penetrates through the first cover and extends into the inner cavity of the first cover, and a coolant is introduced into the cooling pipeline;

[0019] A horn pipe is fixedly provided in the first cover, and one end of the horn pipe is connected to a suction pump.

[0020] As a further improvement of the above technical solution, the clamping device includes a plurality of pressing members hinged below the bracket, a binding member is provided on the outer side of the plurality of pressing members, and a blocking member capable of abutting against the pressing member is further provided at the bottom of the bracket;

[0021] Rubber that can contact the lead ingot is provided on the pressing member, and a first fitting portion and a second fitting portion are further provided on the rubber.

[0022] As a further improvement of the above technical solution, a base is provided below the bracket, and a sliding column that is slidably provided with the bracket is provided on the top of the base;

[0023] A first slide rail is movably provided on the sliding column, and a driving source for driving its up and down movement is connected to the first slide rail; a second slide rail is slidably provided between the first slide rails, the drilling device is slidably provided on the second slide rail, and a locking mechanism is provided between the first slide rail and the second slide rail.

[0024] As a further improvement of the above technical solution, a conveying roller for placing the lead ingot is provided on the base, and a driving source for driving its rotation is connected to one end of the conveying roller;

[0025] A leakage hole penetrating up and down is provided on the base, a collecting hopper is fixedly provided at the bottom of the base, and a collecting box is provided below the collecting hopper.

[0026] Advantages of the present invention:

[0027] 1. The present invention provides a method and device for sampling and sample preparation of rich lead. Cleaning the impurities on the surface of the lead ingot before sampling can reduce the influence of impurities on the quality of the lead sample during sampling. During the sampling and sample preparation process, defective positions are discarded, making the sampling more spatially representative. Using anhydrous ethanol for cooling can improve the cooling effect and reduce the phenomenon of smoke oxidation caused by friction heating. When bagging, multiple mixings are required to ensure the consistency of the lead samples in different bags, which can reflect the integrity of the quality of the entire batch of lead samples during quality inspection.

[0028] 2. During the operation of the entire sampling device, the drilled drill chips are synchronously cut and refined, which can refine the sampled lead chips. For unrefined particles, they can be further ground and refined by a sample mill after sieving, thereby improving the efficiency of the entire sampling and sample preparation process. By setting the first cover and the second cover, the drill bit and the drilling hole can be covered to reduce the scattering of chips during drilling sampling. By setting the first hopper, the drilled chips can be placed in the first hopper, reducing the overflow of chips and facilitating chip collection.

[0029] 2. By setting the first cutter and the second cutter, the chips can be directly cut off when the drilling chips are discharged, achieving the refinement of the chip particles. And during the rotation of the first hopper, under the action of centrifugal force, the chips can be thrown out in all directions. By setting the first hopper and the second hopper, the already chopped chips can be further ground, achieving further refinement of the chips. After drilling is completed, the drilling component is withdrawn upward, which can simultaneously drive the first hopper upward, causing the ground chip particles between the first hopper and the second hopper to be discharged downward through the drilling hole. During drilling, coolant is sprayed downward through the cooling pipe to cool down and prevent the phenomenon of smoke oxidation caused by overheating due to friction. Through the horn pipe, the harmful substances generated inside the first cover can be sucked out and discharged.

[0030] 3. By setting the pressing member, the lead ingot can be clamped. Different placement surfaces of the lead ingot can be used to clamp the lead ingot, with more clamping forms and a wider clamping range. After clamping the lead ingot, by adjusting the position of the second slide rail, the drilling device can move in the diagonal direction of the lead ingot, which is convenient for sampling and positioning at the drilling position. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is Figure 1 the schematic diagram of the structure in the A direction in

[0033] Figure 3 is Figure 1Schematic structural diagram in the B direction;

[0034] Figure 4 is Figure 1 Schematic cross-sectional view in the C-C direction;

[0035] Figure 5 is Figure 4 Schematic enlarged partial structure diagram at D in;

[0036] Figure 6 is Figure 5 Schematic structural diagram in the E direction;

[0037] Figure 7 is Figure 5 Schematic structural diagram in the F direction;

[0038] Figure 8 is Figure 5 Schematic enlarged partial structure diagram at G in;

[0039] Figure 9 is the schematic unfolded structure diagram on 20;

[0040] Figure 10 is Figure 8 Schematic partial cross-sectional structure diagram perpendicular to the paper plane and perpendicular to the cutting surfaces of the first cutter and the second cutter.

[0041] The text markings in the figure are as follows: 10, bracket; 11, drilling part; 111, drill pipe; 112, drill bit; 12, first cover; 13, connecting sleeve; 14, first hopper; 15, first cutter; 16, lifting frame; 17, second cutter; 18, grinding part; 19, second cover; 20, second hopper; 21, pressing part; 22, binding part; 23, blocking part; 24, rubber; 241, first fitting part; 242, second fitting part; 25, boss; 26, rotating sleeve; 27, connecting seat; 28, spring; 29, connecting rod; 30, base; 31, sliding column; 32, conveying roller; 33, first slide rail; 34, second slide rail; 35, leakage hole; 36, collecting hopper; 37, collecting box; 38, cooling pipeline; 39, horn pipe. Detailed implementation manners

[0042] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0043] A sampling and sample preparation method for rich lead, comprising the following steps:

[0044] (1) Cleaning: Remove the impurities on the surface of the lead ingot and clean the tools during sampling. When cleaning the lead ingot, the impurities on the six surfaces of the lead ingot need to be knocked off to prevent the impurities on the surface of the lead ingot from contaminating the sampled lead sample. The tools used during sampling need to be cleaned several times with industrial alcohol until they are clean and free of contamination. The containers for the rich lead shavings must also be wiped clean with clean toilet paper.

[0045] (2) Drilling and sampling: Place the cleaned lead ingot on the sampling device, clamp it, and then position the drilling. The positioning position is at a non-central point on the diagonal line of the upper and lower surfaces of the lead ingot. Specifically, the selected positioning position is near the 1 / 3 or 1 / 5 position on the diagonal line. This can ensure sufficient spatial representativeness during each sampling and also prevent sampling at the middle position of the lead ingot to avoid any movement in the middle of the lead ingot. Drill the hole and spray anhydrous ethanol to cool it down. Spraying anhydrous ethanol can prevent the drill bit from generating fuming oxidation due to overheating caused by friction. After drilling is completed, all the drill chips need to be collected as the sampling sample.

[0046] (3) Sample preparation: Send all the collected drill chips into the grinding machine, gradually grind them into powder, spray anhydrous ethanol to cool it down, and pass through a 60-mesh sieve. After gradual mixing and reduction (quartering method) to 1300 - 1500 grams, specifically 1500 grams; then send the obtained powder back into the grinding machine, grind it all in batches, spray anhydrous ethanol to cool it down, and pass through a 100-mesh sieve; bake all the fine powder for 30 - 35 minutes at a temperature of 70 - 80 °C, specifically select 30 minutes at 80 °C.

[0047] (4) Bagging: Take out the dried powder, cool it, and after thorough mixing multiple times, divide it into several equal parts. In this embodiment, the specific method of mixing is: Place the sample on two overlapping white papers and continuously mix the sample by diagonal conversion. During the continuous mixing process, mix the sample powder well; when dividing the sample, the quartering method is also used. The specific operation steps of the quartering method are as follows: Gently pick up the sample with the dividing template and let the sample freely slide around to form a cone 4 - 5 times. Then use the dividing template to spread it into a large round cake in a clockwise or counterclockwise direction on the cone of the sample. Then divide the spread round cake into four equal parts and discard the diagonal samples to complete one reduction; then spread the reduced sample into a round cake in a clockwise or counterclockwise direction with the dividing template and divide it into twelve or fourteen equal parts on average. Mix any two sub-samples of a pair of diagonals in the sample on a small piece of paper, bag the mixed sample, and perform vacuum treatment. A total of 6 - 7 bags are packaged. Among them, one bag is for the customer, one bag is sent for external inspection and arbitration, two bags are sealed for sample retention for future reference, two bags are sent to the quality inspection center for testing, and the excess fine powder is combined and packed with all the coarse powder and returned together with the entire batch of rich lead products for sale.

[0048] A sampling device for a sampling and sample preparation method for rich lead, as shown in the attached instruction Figures 1 - 10As shown, as a specific embodiment of the present invention, the specific structure of the present invention is as follows: It includes a bracket 10, a clamping device for fixing lead ingots is arranged on the bracket 10, and a drilling device for sampling lead ingots is arranged above the bracket 10; a base 30 is arranged below the bracket 10, a sliding column 31 slidably arranged with the bracket 10 is arranged on the top of the base 30, a support seat is arranged on the top of the base 30, the sliding column 31 is fixedly arranged on the support seat, and a cylinder for pushing the bracket 10 to move up and down is fixedly arranged on the support seat; a first slide rail 33 is movably arranged on the sliding column 31, a driving source for driving it to move up and down is connected to the first slide rail 33, and the driving source is also a selected cylinder;

[0049] A second slide rail 34 is slidably arranged between the first slide rails 33, the drilling device is slidably arranged on the second slide rail 34, and a locking mechanism is arranged between the first slide rail 33 and the second slide rail 34. The specific structure of the locking mechanism is that chutes are respectively arranged on the first slide rail 33 and the second slide rail 34, a slide bar connecting the first slide rail 33 and the second slide rail 34 is arranged in the chute, a roller rotatably arranged with the bottom surface of the first slide rail 33 is rotatably arranged at the bottom of the slide bar, and a cam in contact with the top surface of the second slide rail 34 is rotatably arranged at the top of the slide bar. By rotating the cam, the slide bar can be pulled, so that the roller and the cam clamp the first slide rail 33 and the second slide rail 34. A locking mechanism for fixing the drilling device is also arranged on the second slide rail 34. The locking mechanism arranged on the second slide rail 34 is a handle that is threadedly connected to the transmission box of the drilling device and rotates. When the handle is rotated and the handle is pushed down against the second slide rail 34, the locking mechanism can be fixed. The locking mechanism is opened during sampling positioning to facilitate free movement of the position. After the position is determined, the position of the drilling device is fixed by locking the locking mechanism to facilitate drilling and sampling;

[0050] A through hole 35 is arranged vertically through the base 30, a collection hopper 36 is fixedly arranged at the bottom of the base 30, a collection box 37 is arranged below the collection hopper 36, and the drill chips dropped during drilling and sampling and those dropped onto the collection box 37 are collected. A conveying roller 32 for placing lead ingots is arranged on the base 30. A plurality of conveying rollers 32 are arranged, and are respectively arranged on both sides of the through hole 35. One end of the conveying roller 32 is connected to a driving source for driving its rotation, and the driving source is a selected motor. When the motor is started, the lead ingots on the conveying roller 32 can be sent away;

[0051] The drilling device includes a drilling member 11, and a first enclosure 12 that encloses the outside of the drilling member 11 is provided on the outside of the drilling member 11; a connecting sleeve 13 is splined to the drilling member 11, and the connecting sleeve 13 and the drilling member 11 can slide up and down relative to each other, but cannot rotate relative to each other. When the drilling member 11 rotates, the connecting sleeve 13 can be driven to rotate together. A first cutting tool 15 is fixedly provided at the lower end of the connecting sleeve 13; the first cutting tool 15 can rotate together with the connecting sleeve 13. A lifting frame 16 that can move up and down following the connecting sleeve 13 is rotatably provided on the connecting sleeve 13. A second cutting tool 17 that cooperates with the first cutting tool 15 to cut off chips is fixedly provided at the lower end of the lifting frame 16. Specifically, a tool mounting ring is fixedly provided at the lower end of the lifting frame 16, and a number of tool mounting seats are fixedly provided on the tool mounting ring. The second cutting tool 17 is fixedly provided on the tool mounting seat. The second cutting tool 17 and the lifting frame 16 can only move up and down following the connecting sleeve 13. When the drilling member 11 rotates to drill a lead ingot, the discharged drill chips can be cut off during the discharging process under the action of the first cutting tool 15 and the second cutting tool 17.

[0052] As shown in the attached drawings of the specification Figure 4 , 5 , 8, and 9, on the basis of the above embodiment, further optimization is as follows: A second enclosure 19 is provided below the first enclosure 12. A second hopper 20 is fixedly provided on the second enclosure 19. A first hopper 14 that is fixedly connected to the connecting sleeve 13 is rotatably provided above the second hopper 20. Specifically, a number of connecting rods 29 are fixedly installed between the bottom of the connecting sleeve 13 and the first hopper 14. The first cutting tool 15 is fixedly installed on the connecting rods 29;

[0053] A gap is provided between the first hopper 14 and the second hopper 20, and grinding portions 18 (which can be referred to in the attached drawings of the specification Figure 9 shown) are arranged in an alternating manner on the lower surface of the first hopper 14 and the upper surface of the second hopper 20. In this embodiment, the grinding portions 18 are cutting teeth;

[0054] A connecting seat 27 is fixedly provided between the first enclosure 12 and the second enclosure 19. The connecting sleeve 13 and the second cutting tool 17 are rotatably arranged relative to each other. The lifting frame 16 and the connecting seat 27 are slidably arranged up and down relative to each other. A spring 28 that pushes the connecting sleeve 13 downward is provided between the connecting sleeve 13 and the connecting seat 27;

[0055] The drilling member 11 includes a drill rod 111 and a drill bit 112, the diameter of the drill bit 112 is larger than the diameter of the drill rod 111, and a driving source for driving the drill rod 111 to rotate is connected to the top of the drill rod 111. The specific mechanism includes a transmission box fixedly connected to the second slide rail 34, a transmission wheel is rotatably arranged in the transmission box, a transmission shaft is splined in the transmission wheel, and the lower end of the transmission shaft is connected to the drill rod 111 for transmission. A driving motor is fixedly arranged on the top of the transmission box, and the output shaft of the motor is driven by the transmission wheel through a belt drive. A lifting device for pushing the drill rod 111 up and down is arranged at the upper end of the transmission shaft. The specific structure of the lifting device includes a threaded shaft rotatably arranged above the transmission box, a connecting rod fixed to the transmission shaft is threadedly connected on the threaded shaft, and a handwheel is also rotatably arranged on the transmission box, and the end of the handwheel shaft is connected to the threaded shaft for time transmission, specifically a selected gear connection.

[0056] When the hand wheel is turned, the transmission shaft can be synchronously driven to realize up and down movement. When drilling downward for sampling, the drill rod 111 is driven to move downward, so that the drill bit 112 moves downward. When the motor is started, it drives the drill bit 112 to rotate, and then drilling downward for sampling. In the process of downward movement, the discharged drill chips are cut off by the joint cutting action of the first cutter 15 and the second cutter 17. In the process of the drill rod 111 driving the first hopper 14 to rotate, the cut chips are thrown to the surroundings, so that the chips fall into the gap between the first hopper 14 and the second hopper 20. Under the grinding of the staggered grinding parts 18, the chips can be ground into fine powder. After the lead ingot is drilled through, the hand wheel is turned, and the drill rod 111 is driven to rotate. Move upward to exit the drilling. During the upward movement, the drill bit 112 can support the bottom of the connecting sleeve 13, and then drive the connecting sleeve 13 to rise upward. At the same time, the first hopper 14 moves upward, and the drill cuttings between the first hopper 14 and the second hopper 20 can be discharged downward. After the drill cuttings on the first hopper 14 are discharged, the motor is stopped. The drill cuttings drilled by the drill bit 112 first pass through the center hole, and are chopped under the action of the first cutter 15 and the second cutter 17. Then, they are thrown into the gap between the first hopper 14 and the second hopper 20 by the first hopper 14 for grinding. Finally, the first hopper 14 is lifted and discharged through the center hole. The drill cuttings complete a circulation loop in the drilling device and are synchronously chopped and refined.

[0057] As the instruction manual Figure 5 , 9As shown, it is further optimized on the basis of the above embodiment: a plurality of bosses 25 are provided on the upper side of the second hopper 20, and a rotating sleeve 26 is fixedly provided on the boss 25, and the rotating sleeve 26 supports the first hopper 14 and is arranged to rotate relative to the first hopper 14. Specifically, a plurality of supporting balls are provided on the rotating sleeve 26, and the supporting balls and the first hopper 14 rotate relative to each other. There is rolling friction between the balls and the first hopper 14, thereby reducing the friction between the first hopper 14 and the second hopper 20. By providing a plurality of bosses 25, the ejected drill cuttings can normally enter the gap between the first hopper 14 and the second hopper 20 to complete the grinding.

[0058] As the instruction manual Figure 4 As shown, it is further optimized on the basis of the above embodiment: a cooling pipe 38 is arranged on the first sealing cover 12, and the cooling pipe 38 penetrates the first sealing cover 12 and extends into the inner cavity of the first sealing cover 12. A coolant is passed into the cooling pipe 38. In this embodiment, the coolant is anhydrous ethanol. When anhydrous ethanol is sprayed during drilling, the funnel-shaped structure of the first hopper 14 and the second hopper 20 can allow the sprayed anhydrous ethanol to flow into the borehole, so when drilling, the temperature inside the borehole can be significantly reduced;

[0059] A trumpet tube 39 is fixedly disposed in the first sealing cover 12 , and one end of the trumpet tube 39 is connected to a suction pump, which is mainly used to suck away the ethanol that has volatilized in the first sealing cover 12 and some smoke and dust generated during drilling.

[0060] As the instruction manual Figure 1 , 3 As shown, it is further optimized on the basis of the above embodiment: the clamping device includes a plurality of top pressing members 21 hingedly connected to the bottom of the bracket 10. In this embodiment, four top pressing members 21 are provided. The outer sides of the four top pressing members 21 are provided with binding members 22, which are binding steel ropes. The bottom of the bracket 10 is also provided with a blocking member 23 that can support the top pressing member 21. The blocking member 23 is a top block. The purpose of providing the binding member 22 and the blocking member 23 is to prevent the top pressing member 21 from swinging excessively and losing the clamping effect. However, the top pressing member 21 needs to have a certain amount of swing so as to clamp lead ingots of different sizes to adapt to different clamping surfaces.

[0061] The top pressure piece 21 is provided with a rubber 24 that can contact with the lead ingot. The rubber 24 is also provided with a first fitting portion 241 and a second fitting portion 242. The first fitting portion 241 and the second fitting portion 242 are sheet rubbers protruding from the rubber 24. They can contact with the surface of the lead ingot after clamping the lead ingot, so as to prevent the chips flying out of the lead ingot from falling out of the equipment when drilling the lead ingot, so as to facilitate the collection and cleaning of the chips.

[0062] The specific use of the device is as follows: firstly, the lead ingot is placed on the conveying roller 32, and then the motor connected to the conveying roller 32 is started to rotate the conveying roller 32, so that the conveying roller 32 can drive the lead ingot to move upward to determine the clamping position;

[0063] After the position is determined, the cylinder between the control base 30 and the slide column 31 is started, so that the bracket 10 drives the pressing piece 21 to move downward, and the lead ingot is pressed downward, and then the drilling position diagonally to the lead ingot is determined by pushing the second slide rail 34 and moving the transmission box of the drilling device. After the position is determined, the locking mechanism is locked to fix the drilling position;

[0064] Then, the cylinder between the first slide rail 33 and the bracket 10 is controlled to start, driving the first slide rail 33 to descend, so that the second sealing cover 19 contacts the surface of the lead ingot, and the motor connected to the drilling member 11 is controlled to start, so that the drilling member 11 can be driven to rotate, and then the hand wheel set on the transmission box is turned to make the drilling member 11 drill downward. During the drilling process, the drill cuttings are discharged outward. During the discharge process, the first cutter 15 and the second cutter 17 cooperate with each other to cut the discharged drill cuttings into pieces. During the process of the drilling member 11 driving the first hopper 14 to rotate, the cut drill cuttings can be thrown outward, and after entering the gap between the first hopper 14 and the second hopper 20, the cut drill cuttings can be ground into fine pieces under the action of the grinding part 18;

[0065] After the hole is drilled, the hand wheel is turned upward to make the drill rod 111 and the drill bit 112 rise upward. During the process of the drill bit 112 rising upward, the connecting sleeve 13 can be pushed upward to move, thereby simultaneously driving the first hopper 14 to move upward, so that the gap between the first hopper 14 and the second hopper 20 becomes larger, and the drill cuttings in the gap fall from the center hole. During the continuous rotation of the drill bit 112 and the drill rod 111, the drill cuttings in the first hopper 14 are discharged outward and then discharged through the center hole, and then the motor is controlled to stop rotating;

[0066] When collecting drill cuttings, it is not necessary to lift the entire drilling device upward. After the drilling part 11 is lifted upward, the cuttings pass through the central hole and then are discharged downward into the collection box 37 through the drilled hole in the lead ingot for collection. Or after drilling through the lead ingot, lift the drilling part 11 upward and stop the drill bit 112 at the central hole position on the second cover 19. Then control the cylinder between the first slide rail 33 and the bracket 10 to start, so that the entire drilling device is lifted upward. At this time, after the drill bit 112 blocks the central control position, the drill cuttings collected in the second cover 19 cannot fall. Then place the collection box under the central hole on the second cover 19, and then lift the drilling part 11 upward. When the drilling part 11 is lifted, it drives the first hopper 14 upward, and then discharges the drill cuttings in the gap between the first hopper 14 and the second hopper 20 into the collection box for collection.

[0067] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device.

[0068] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation manner of the present invention. It should be pointed out that due to the limitation of literal expression and the objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A sampling and sample preparation device for rich lead, characterized in that: It comprises a support (10), a clamping device for fixing the lead ingot is arranged on the support (10), and a drilling device for sampling the lead ingot is arranged above the support (10); The drilling device comprises a drilling member (11), a first sealing cover (12) is arranged on the outer side of the drilling member (11) to seal the drilling member; a connecting sleeve (13) is spline-connected to the drilling member (11), a first cutter (15) is fixedly arranged at the lower end of the connecting sleeve (13); a lifting frame (16) is rotatably arranged on the connecting sleeve (13) and can move up and down with the connecting sleeve (13), a second cutter (17) is fixedly arranged at the lower end of the lifting frame (16) to cooperate with the first cutter (15) to cut off chips; A second sealing cover (19) is arranged below the first sealing cover (12), a second hopper (20) is fixedly arranged on the second sealing cover (19), and a first hopper (14) is rotatably arranged above the second hopper (20) and is fixed to the connecting sleeve (13); A gap is provided between the first hopper (14) and the second hopper (20), and the lower surface of the first hopper (14) and the upper surface of the second hopper (20) are provided with grinding parts (18) arranged in an interlaced manner; during the drilling process, drill cuttings are discharged outwardly, and during the discharge process, the first cutter (15) and the second cutter (17) cooperate with each other to cut the discharged drill cuttings into pieces, and when the drilling member (11) drives the first hopper (14) to rotate, the cut drill cuttings are thrown outwardly and enter the gap between the first hopper (14) and the second hopper (20), and then the cut drill cuttings are ground into fine pieces under the action of the grinding parts (18); The sampling and sample preparation device of the noble lead is used for the sampling and sample preparation method of the noble lead, and the sampling and sample preparation method of the noble lead comprises the following steps: (1) Cleaning: clean the impurities on the surface of the lead ingot and clean the tools used for sampling; (2) Drilling sampling: Place the cleaned lead ingot on the sampling device, clamp it, and drill to locate it; the location is a non-center point on the diagonal line of the upper and lower surfaces of the lead ingot; drill a hole and spray anhydrous ethanol to cool it; collect all drill cuttings; (3) Sample preparation: All the collected drill cuttings are fed into a sample grinder, ground into powders one by one, sprayed with anhydrous ethanol to cool, sieved, gradually mixed and reduced to 1300-1500 g; then the obtained powder is fed into a sample grinder again, ground into powders one by one, sprayed with anhydrous ethanol to cool, and sieved; all the fine powders are baked for 30-35 min at a temperature of 70-80°C; (4) Bagging: Take out the dried powder, cool it, and after repeated mixing and reduction, divide it into several equal portions and vacuum bag it.

2. The sampling device according to claim 1, wherein: A connecting seat (27) is fixedly arranged between the first cover (12) and the second cover (19). The connecting sleeve (13) and the second cutter (17) are rotatably arranged relative to each other. The lifting frame (16) and the connecting seat (27) are slidably arranged vertically relative to each other. A spring (28) for pushing the connecting sleeve (13) downward is arranged between the connecting sleeve (13) and the connecting seat (27). A plurality of connecting rods (29) are fixedly installed between the bottom of the connecting sleeve (13) and the first hopper (14). The first cutter (15) is fixedly installed on the connecting rods (29).

3. The sampling device according to claim 2, wherein: A plurality of bosses (25) are arranged on the upper side surface of the second hopper (20). A rotating sleeve (26) is fixedly arranged on the bosses (25). The rotating sleeve (26) supports the first hopper (14) and is rotatably arranged relative to the first hopper (14).

4. The sampling device according to claim 3, wherein: The drilling member (11) includes a drill pipe (111) and a drill bit (112). The diameter of the drill bit (112) is larger than that of the drill pipe (111). The top of the drill pipe (111) is connected to a driving source for driving its rotation and a lifting device for pushing it up and down.

5. The sampling device according to claim 4, wherein: A cooling pipeline (38) is arranged on the first cover (12). The cooling pipeline (38) penetrates through the first cover (12) and extends into the inner cavity of the first cover (12). A coolant is introduced into the cooling pipeline (38). A horn pipe (39) is fixedly arranged in the first cover (12). One end of the horn pipe (39) is connected to a suction pump.

6. The sampling device according to claim 1, wherein: The clamping device includes a plurality of pressing members (21) hinge-connected below the bracket (10). A restraint member (22) is arranged on the outer side surfaces of the plurality of pressing members (21). A blocking member (23) capable of abutting against the pressing members (21) is further arranged at the bottom of the bracket (10). Rubber (24) capable of contacting the lead ingot is arranged on the pressing member (21). A first fitting portion (241) and a second fitting portion (242) are further arranged on the rubber (24).

7. The sampling device according to any one of claims 1-6, characterized in that: A base (30) is arranged below the bracket (10). A sliding column (31) slidably arranged relative to the bracket (10) is arranged on the top of the base (30). A first slide rail (33) is movably arranged on the sliding column (31). A driving source for driving its up and down movement is connected to the first slide rail (33). A second slide rail (34) is slidably arranged between the first slide rails (33). The drilling device is slidably arranged on the second slide rail (34). A locking mechanism is arranged between the first slide rail (33) and the second slide rail (34).

8. The sampling device according to claim 7, characterized in that: A conveying roller (32) for placing the lead ingot is arranged on the base (30). One end of the conveying roller (32) is connected to a driving source for driving its rotation. A through hole (35) penetrating up and down is arranged on the base (30). A collecting hopper (36) is fixedly arranged at the bottom of the base (30). A collecting box (37) is arranged below the collecting hopper (36).

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