Modular concentrate sample preparation system and process method

Abstract

The invention relates to the technical field of preparation of flotation concentrate samples, in particular to a modular concentrate sample preparation system and process method. The concentrate sample preparation system comprises a sample placing module, a carrying module, a feeding module, a coarse crushing module, a fine grinding module, a collecting module, a cleaning module and a control module. The method is suitable for pretreatment preparation of dried concentrate samples, it is ensured that all the samples are ground to be below the required mesh number through the processes of original sample pretreatment, graded grinding, filling collection and data calculation and summarization, the accuracy of subsequent inspection and analysis is ensured, and it is avoided that due to the fact that detection results of samples prepared by different operators and different preparation methods have deviations, the detection accuracy is improved. And trade disputes are caused.

Description

Technical Field

[0001] This invention relates to the field of flotation concentrate sample preparation technology, specifically to a modular concentrate sample preparation system and process. Background Technology

[0002] Concentrates include copper concentrate, gold concentrate, lead-zinc concentrate, etc. Taking copper concentrate as an example, for a 600g sample of GBW07166(GSO-5) copper concentrate analysis, the preparation cost is approximately 1200 yuan per sample. Based on preparing 40-60 samples per day, the sample preparation cost is approximately 48,000-72,000 yuan. Some samples require preparation volumes as high as 3kg, leading to a surge in workload and becoming a significant long-term expense.

[0003] Furthermore, due to the inverted price of copper concentrate, mines often mix some slag, smelted matte, and high-grade raw ore (over 30%) with flotation ore during production to form ore samples with a total copper content of 16%-20% for sale. This mixed composition poses significant problems for sample preparation, leading to incomplete samples failing to pass the required mesh size, resulting in inaccurate and unrepresentative test results. Financial disputes are also increasing, and arbitration is raising the costs of sample preparation and analysis.

[0004] The current main concentrate preparation process involves manual sampling, wet sample mixing and reduction, drying (using hot plates or ovens) to determine moisture content, manual reduction, grinding to below 160 or 200 mesh, manual sieving, and packaging to the required number of sample portions. The majority of the work is done manually. The most critical processes in sample preparation—reduction, grinding, and sieving—are time-consuming, inefficient, and the working environment is harsh (high buoyancy and sedimentation, flotation chemical reagents), posing a significant risk to human health. Currently, a single person can only prepare 8-12 samples in an 8-hour workday. Summary of the Invention

[0005] To address the above-mentioned problems, one object of the present invention is to provide a modular concentrate sample preparation system.

[0006] The second objective of this invention is to provide a process method for preparing concentrate samples.

[0007] The first technical solution adopted in this invention is: A modular concentrate sample preparation system, the concentrate sample preparation system comprising: The sample placement module is used to receive the sample to be prepared and to identify and record the original information of the sample to be prepared. A conveying module is used to pour the sample to be prepared into the feed hopper; The feeding module includes the feeding hopper and the vibrating screen, is used for screening the sample to be prepared; the sample smaller than the screen hole enters the fine grinding process; the large particle sample larger than the screen hole is cleaned of the ferromagnetic impurities by the rotary iron separator, and the ferromagnetic impurities are weighed and recorded; and the large particle sample after the iron removal enters the coarse crushing process. The coarse crushing module is in communication with the feeding module, and is used for coarsely crushing the large particle sample after the iron removal to below the required particle size. The fine grinding module is in communication with the feeding module and the coarse crushing module respectively, and is used for finely grinding the sample after the coarse crushing and the screened sample of the feeding module to the required mesh number. The collecting module is in communication with the fine grinding module, and is used for collecting the prepared sample. The cleaning module is connected to the feeding module, the coarse crushing module, the fine grinding module and the collecting module respectively, and is used for cleaning the modules by high-pressure gas sweeping and negative pressure adsorption after the preparation is completed. The control module is connected to the sample placing module, the conveying module, the feeding module, the coarse crushing module, the fine grinding module, the collecting module and the cleaning module respectively, and is used for monitoring the operation of the modules.

[0008] The second technical solution adopted in the present application is: A concentrate sample preparation process method, the preparation process method comprising: The above-mentioned modular concentrate sample preparation system is adopted; The original information of the sample to be prepared is identified and recorded; The sample to be prepared is screened; the sample smaller than the screen hole enters the fine grinding process; the large particle sample larger than the screen hole is cleaned of the ferromagnetic impurities, and the large particle sample after the iron removal is coarsely crushed to below the required particle size. After the sample after the coarse crushing and the screened sample are finely ground to the required mesh number, the sample is separated and collected, and weighed.

[0009] The beneficial effects of the above technical solution are: (1) The modular concentrate sample preparation system and process method provided by the present application are suitable for pretreating and preparing the dried concentrate (copper concentrate, gold concentrate, lead-zinc concentrate, etc.) sample, and ensure that the sample is ground to below the required mesh number through the original sample pretreatment, grading grinding, filling and collecting, data calculation and summary process, ensure the accuracy of subsequent inspection and analysis, and avoid the deviation of sample detection results prepared by different operators and different preparation methods, which leads to trade disputes.

[0010] (2) The modular concentrate sample preparation system and process method provided by the application can automatically prepare samples except that manual participation is required for feeding and taking samples, the sample preparation process is fast, efficient, accurate, and repeatable, the sample preparation cost is controlled, and the sample preparation efficiency is improved.

[0011] (3) The modular concentrate sample preparation system and process method provided by the application can automatically weigh each process link, record, count, and check sample data information, calculate the sample loss rate, and output a report after information is summarized, thereby facilitating subsequent work. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The structural schematic diagram of the concentrate sample preparation system provided by an embodiment of the application is shown in the figure. Figure 2 The structural schematic diagram of the feeding module of the concentrate sample preparation system is shown in the figure. Figure 3 The structural schematic diagram of the coarse crushing module of the concentrate sample preparation system is shown in the figure. Figure 4 The structural schematic diagram of the fine grinding module of the concentrate sample preparation system is shown in the figure. Figure 5 The structural schematic diagram of the collection module of the concentrate sample preparation system is shown in the figure. Figure 6 The process flow chart of the concentrate sample preparation method provided by an embodiment of the application is shown in the figure.

[0013] BRIEF DESCRIPTION OF DRAWINGS 1-sample placement module, 11-weighing sensor, 2-conveying module, 3-feeding module, 31-negative pressure dust collection device, 32-feeding hopper, 33-vibrating screen, 34-rotary iron separator, 35-fine material outlet, 36-coarse material outlet, 37-LED lamp, 38-photosensitive sensor, 4-coarse crushing module, 41-feeding port of the coarse crushing module, 42-discharge port of the coarse crushing module, 5-fine grinding module, 51-grinding tool, 52-bottom screen, 6-collection module, 61-cyclone separator, 62-collection device, 63-sample weighing sensor, 64-primary cyclone separator, 65-secondary cyclone separator, 66-collection bottle, 67-elevation mechanism, 68-pipeline valve, 7-cleaning module, 8-control module, 9-conveying pipeline. DETAILED DESCRIPTION

[0014] The embodiments of the application are further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the application, but cannot be used to limit the scope of the application, that is, the application is not limited to the described preferred embodiments, and the scope of the application is defined by the claims.

[0015] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance; the above-mentioned terms can be understood in the specific meaning in the present application by the person skilled in the art according to the specific circumstances.

[0016] Embodiment one As Figure 1 shown, one embodiment of the present application provides a modular concentrate sample preparation system. The concentrate sample preparation system comprises a sample placing module 1, a carrying module 2, a feeding module 3, a coarse crushing module 4, a fine grinding module 5, a collecting module 6, a cleaning module 7 and a control module 8.

[0017] The sample placing module 1 is used to receive the sample to be prepared and identify and record the original information of the sample to be prepared (obtain sample code information, initial weight information). Specifically, the sample placing module 1 adopts a circulating conveying line structure, which comprises a circulating conveying line and a weighing sensor 11 arranged below the carrying process position on the circulating conveying line. The person manually places the sample bottle containing the sample to be prepared on the circulating conveying line at a fixed position, identifies the data information of the sample to be prepared, and moves the sample bottle on the circulating conveying line to the carrying process position. The weighing sensor 11 weighs and records the sample bottle containing the sample to be prepared.

[0018] The carrying module 2 pours the sample to be prepared into the feeding hopper. Specifically, the built-in vibrator in the gripper is started to ensure that all the samples enter the feeding module, and the bottle opening is sealed with the feeding hopper. Then, the empty bottle (the sample bottle poured out of the sample to be prepared) is put back to the original place, the weighing sensor 11 weighs and records the empty bottle (the sample bottle poured out of the sample to be prepared) again, the circulating conveying line transports the empty bottle to the person, and the person takes away the empty bottle. The circulating conveying line adopts a motor-driven synchronous belt or belt mode, and the carrying module 2 can adopt a mechanical arm, and the mechanical arm gripper can adopt a pneumatic or electric driving mechanism to clamp.

[0019] As Figure 2As shown, the feeding module 3 is in communication with the fine grinding module 5 and the coarse crushing module 4, respectively, which comprises a feeding hopper 32, a vibrating screen 33 and a dust removal port (not shown in the figure) connected to a negative pressure dust collection device. The vibrating screen 33 is arranged obliquely below the feeding hopper. The fine material outlet 35 is directly below the vibrating screen 33. The vibrating screen 33 has an opening 31 in the downward oblique direction. A rotary iron remover 34 is arranged at the opening 31. The coarse material outlet 36 is below the opening 31. The fine material outlet 35 is connected to the fine grinding module 5. The coarse material outlet 36 is connected to the coarse crushing module 4. The sample to be prepared enters the feeding module 3 from the feeding hopper and falls into the vibrating screen 33 for screening. The sample to be prepared flows on the vibrating screen 33. The sample smaller than the screen hole of the vibrating screen (for example, the sample with a particle size less than 1 mm) is screened into the fine grinding module 5 through the fine material outlet. The large particle sample (for example, the sample with a particle size greater than 1 mm) greater than the screen hole of the vibrating screen moves to the opening 31 in the downward oblique direction under the action of vibration, and the iron is removed by the rotary iron remover 34. The ferromagnetic impurities are collected into a fixed collection barrel and weighed and recorded. After the iron removal, the large particle sample falls from the opening 31 into the coarse crushing process through the coarse material outlet 36. The feeding hopper 32 is provided with a dust removal port (the specific connection is omitted in the figure). When the sample to be prepared is poured, the negative pressure dust collection device is started to adsorb dust and avoid dust pollution. The negative pressure dust collection device can be connected to the collection module to avoid loss of the sample to be prepared. The LED lamp 37 and the photosensitive sensor 38 are also arranged at the fine material outlet 35 to detect whether there is material in the bin. When there is material in the bin, the photosensitive sensor will be blocked and cannot receive the light signal. When there is no material, the light signal can be received. After detecting that all the materials pass through, a delay time is set, and the sample preparation loss rate is judged by weighing the collected device. Then, the self-cleaning program is started to clean the system.

[0020] As shown in Figure 3 The coarse crushing module 4 is in communication with the feeding module 3 for coarsely crushing the large particle sample after iron removal to below the required particle size. The coarse crushing module 4 can adopt a disc grinding or a pair of roller grinding device, or a jaw crusher or a hammer impact crushing device. The large particle sample after iron removal enters the coarse crushing cavity from the feeding port 41 of the coarse crushing module. The disc grinding or the pair of roller gap can be adjusted according to the system setting as needed. The sample is crushed to below the required particle size (for example, the particle size is 0.2 mm) for different samples, and then enters the fine grinding module 5 through the discharge port 42 of the coarse crushing module.

[0021] As shown in Figure 4As shown, the fine grinding module 5 is in communication with the feeding module 3 and the coarse grinding module 4, respectively, for fine grinding the sample after coarse grinding and the sample sieved by the feeding module 3 to the required mesh size. Specifically, the sample after coarse grinding and the sample sieved by the feeding module enter the fine grinding cavity from the feeding port of the fine grinding module, and the particles below 0.2 mm can be directly ground to the required mesh size (160 mesh, 200 mesh) by the cooperation of the grinding tool 51 and the bottom screen 52 with different pore sizes, and then enter the collection module 6 from the discharge port of the fine grinding module.

[0022] As shown, Figure 5 The collection module 6 is in communication with the fine grinding module 5 for collecting the prepared sample, which includes a cyclone separator 61 and a collection device 62. The cyclone separator 61 includes a first-stage cyclone separator 64 and a second-stage cyclone separator 65 connected in series through a pipeline, the discharge port of the fine grinding module 5 is in communication with the feeding port of the first-stage cyclone separator 64, the discharge port of the first-stage cyclone separator 64 is in communication with the feeding port of the second-stage cyclone separator 65, and the discharge port of the second-stage cyclone separator 65 is in communication with the collection device 62, and each part is sealingly connected together through a conveying pipeline 9. The collection device 62 includes a conveying line and a plurality of collection bottles 66 on the conveying line. The sample after fine grinding enters the first-stage cyclone separator 64 from the feeding port of the first-stage cyclone separator 64, then passes through the second-stage cyclone separator 65, and is collected into the collection bottles 66, which contain the prepared sample and are conveyed to the next process by the conveying line. The two-stage cyclone separator can reduce the sample preparation loss rate, the discharge port of the second-stage cyclone separator is controlled to be opened and closed by a pipeline valve 68, which is closed during the collection of materials and opened during the cleaning, and the materials after the two-stage cyclone separation finally enter the collection barrel, thereby reducing the sample loss. The bottom of the collection device 62 is provided with a jacking mechanism 67, and the jacking mechanism 67 is provided with a sample weighing sensor 63 for weighing and recording the prepared sample.

[0023] The cleaning module 7 is connected to the feeding module 3, the coarse grinding module 4, the fine grinding module 5 and the collection module 6, respectively (the specific connection is omitted in the figure), for cleaning the inside by high-pressure gas sweeping and negative pressure adsorption after the preparation is completed. When the preparation of one sample is completed, the cleaning program is started, and the inside cavity, pipeline, screen and the like which contact the sample are cleaned for several times according to a certain order and time, and the dust-containing gas during the cleaning is treated, so that the parts contacting the sample are clean and will not affect the preparation of the remaining samples. The cleaning module 7 is provided with a cleaning material feeding mechanism, which automatically feeds cleaning materials such as quartz sand and the like which will not affect the sample detection results after the sample is prepared, so that the sample contact surface is physically cleaned. Then, the high-pressure gas is used for secondary cleaning to ensure that there is no cross contamination.

[0024] Control module 8 is electrically connected to sample placement module 1, handling module 2, feeding module 3, coarse crushing module 4, fine grinding module 5, collection module 6, and cleaning module 7, respectively, and is used to monitor the operation of each module. Control module 8 controls the independent operation and linkage of each module in the entire system to complete sample preparation and collection. During sample preparation, it monitors the operating status and data generated by each module, records, statistically analyzes, and outputs reports on sample information. After setting sample preparation requirements, samples are prepared as needed. During sample preparation, data is statistically analyzed and verified to guide each module in completing sample preparation. The information is then summarized to calculate the loss rate and impurity content, and reports are output for easy integration with subsequent testing and analysis processes.

[0025] Example 2 like Figure 6 As shown, one embodiment of the present invention provides a method for preparing concentrate samples. The method for preparing concentrate samples includes: The modular concentrate sample preparation system described above was used.

[0026] The process involves identifying and recording the original information of the samples to be prepared. Specifically, a manual person places a sample vial containing the sample to be prepared on a circulating conveyor line at a fixed location. The data information of the sample to be prepared is identified. The sample vial moves on the circulating conveyor line to the handling station, where a weighing sensor weighs and records the weight of the sample vial containing the sample to be prepared. The handling module pours the sample to be prepared from the sample vial into the feed hopper and returns the empty vial (the sample vial from which the sample to be prepared has been poured out) to its original position. The weighing sensor weighs and records the weight of the empty vial (the sample vial from which the sample to be prepared has been poured out) again. The circulating conveyor line then transports the empty vial to the manual person, who then removes the empty vial.

[0027] The samples to be prepared are screened. Samples smaller than the sieve apertures enter the fine grinding process; large particles larger than the sieve apertures have ferromagnetic impurities removed, and the large particles after iron removal are coarsely ground to below the required particle size. Specifically, the samples to be prepared enter the feeding module from the feed hopper and fall onto the vibrating screen. The samples flow on the vibrating screen, and samples smaller than the sieve apertures pass through the fine material outlet and enter the fine grinding module. Large particles larger than the sieve apertures (e.g., samples with a particle size greater than 1 mm) move downwards on the vibrating screen under the action of vibration to the opening. They are then collected by a rotating iron remover into a fixed collection bucket, where they are weighed and recorded. The large particles after iron removal fall from the opening and enter the coarse grinding process through the coarse material outlet. The large particles after iron removal enter the coarse grinding chamber from the feed inlet of the coarse grinding module. The gap between the disc mill or rollers can be adjusted as needed by the system settings. The samples are ground to the required particle size (e.g., below 0.2 mm) for different samples, and then enter the fine grinding module through the discharge outlet of the coarse grinding module.

[0028] After the coarse crushed sample and the sample sieved by the sample feeding module are finely ground to the required mesh size, they are separated, collected and weighed. Specifically, the coarse crushed sample and the sample sieved by the sample feeding module enter the fine grinding cavity from the feeding port of the fine grinding module, and the particles below 0.2 mm can be directly ground to the required mesh size (160 mesh, 200 mesh) by the cooperation of the grinding cutter and the bottom screen with different pore sizes, and then enter the collection module from the discharge port of the fine grinding module. The finely ground sample enters the primary cyclone separator from the feeding port of the primary cyclone separator, and then enters the secondary cyclone separator, and is collected to the collection device, and the collection device contains the prepared sample.

[0029] The sample data information is recorded, counted and checked, and the information is summarized and output to a report. At the same time, the cleaning mode is started. The preparation of the concentrate sample is completed.

[0030] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A modular concentrate sample preparation system, characterized in that, The concentrate sample preparation system includes: The sample placement module is used to receive the sample to be prepared and to identify and record the original information of the sample to be prepared. A conveying module is used to pour the sample to be prepared into the feed hopper; The feeding module, including the feeding hopper and the vibrating screen, is used to screen the sample to be prepared; samples smaller than the sieve holes enter the fine grinding process; large particles larger than the sieve holes are removed by a rotary iron remover to remove ferromagnetic impurities, and the ferromagnetic impurities are weighed and recorded. The large particles after iron removal enter the coarse crushing process. The coarse crushing module, which is connected to the feeding module, is used to coarsely crush the large particle sample after iron removal to below the required particle size. The fine grinding module is connected to the feeding module and the coarse grinding module respectively, and is used to finely grind the coarsely ground sample and the sample sieved by the feeding module to the required mesh size; A collection module, connected to the fine grinding module, is used to collect the prepared sample; The cleaning module, connected to the feeding module, the coarse crushing module, the fine grinding module, and the collection module respectively, is used to perform high-pressure air sweeping and negative pressure adsorption cleaning on these modules after preparation. The control module is connected to the sample placement module, the handling module, the feeding module, the coarse crushing module, the fine grinding module, the collection module, and the cleaning module, respectively, and is used to monitor the operation of each module.

2. The modular concentrate sample preparation system according to claim 1, characterized in that, The sample placement module adopts a circulating conveyor line structure and weighs the sample bottles containing the samples to be prepared and the sample bottles from which the samples to be prepared are poured out.

3. The modular concentrate sample preparation system according to claim 1, characterized in that, The feeding module also includes a dust removal port connected to a negative pressure dust collection device. The dust removal port is located in the feeding hopper and is used to adsorb dust when the sample to be prepared is poured in.

4. The modular concentrate sample preparation system according to claim 1, characterized in that, The collection module includes: Cyclone separators, including a primary cyclone separator and a secondary cyclone separator connected in series via pipes; and A collection device, connected to the secondary cyclone separator, is used to hold the prepared sample.

5. A modular concentrate sample preparation system according to claim 4, characterized in that, The collection device is equipped with a weighing sensor for weighing the prepared sample.

6. The modular concentrate sample preparation system according to claim 1, characterized in that, The cleaning module includes: The cleaning material dispensing mechanism is used to dispense materials that will not affect the sample test results when preparing viscous samples, and to clean the sample contact surfaces by physical means.

7. The modular concentrate sample preparation system according to claim 1, characterized in that, The control module is also used for recording, statistical analysis, and verification of sample data information, and outputs reports after summarizing the information.

8. The modular concentrate sample preparation system according to claim 1, characterized in that, The coarse grinding module includes a disc grinding or roller grinding device.

9. A process for preparing a concentrate sample, characterized in that, The preparation process includes: The modular concentrate sample preparation system according to any one of claims 1 to 8 is used; And identify and record the original information of the sample to be prepared; The samples to be prepared are screened; samples smaller than the sieve holes are put into the fine grinding process; for large particles larger than the sieve holes, ferromagnetic impurities are removed, and the large particles after iron removal are coarsely crushed to below the required particle size. After coarsely crushed and sieved samples are finely ground to the required mesh size, they are separated, collected, and weighed.

10. The method for preparing a concentrate sample according to claim 9, characterized in that, The preparation process also includes: Record, analyze, and verify sample data, and then summarize the information to output a report.

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