Product dehydration optimization method based on inclined box dense grader and HNS ultrafilter

Abstract

The invention relates to the technical field, and discloses a product dehydration optimization method based on an inclined box dense grader and an HNS ultrafilter, which comprises the following steps: introducing slurry into a vibration inclined box dense grader through a feed distribution system, and dynamically adjusting the vibration frequency, amplitude and period by combining an intermittent vibration system and a slurry concentration detection control system, the concentration self-adaptive control is realized; overflowing slurry is conveyed into an HNS ultrafilter through a slurry conveying system, and efficient separation is achieved through a centrifugal force field and cross flow filtration; the filtrate is shunted by a clear water self-circulation system and is used for process recycling and equipment cleaning; and the concentrated discharged slurry of the HNS ultrafilter and the underflow of the thickener are mixed and output or return to the previous process. The general drawing arrangement is optimized, the slurry dehydration efficiency is improved, and valuable metal is recycled to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of product dehydration technology, and more specifically, to an optimized product dehydration method based on a slanted box thickener classifier and an HNS ultrafiltration unit. Background Technology

[0002] As mineral resource development enters its middle and later stages, ores are becoming increasingly lean, fine-grained, and complex. The continuous expansion of mine production scale places higher demands on the efficiency, stability, and environmental friendliness of mineral processing thickening and dewatering processes. Traditional thickening and dewatering processes, centered on a peripheral (or central) driven thickener, achieve solid-liquid separation through gravity settling and are widely used in the thickening and dewatering of concentrates and tailings. However, against the backdrop of changing resource endowments, stricter environmental standards, and expanded production scale, the inherent defects of traditional processes are becoming increasingly apparent, necessitating technological innovation.

[0003] The defects and shortcomings of existing technology (traditional thickening machine process): 1. Land area and land cost issues: Traditional thickeners rely on pools for settling, which requires a large area and makes overall layout difficult. Moreover, current domestic regulations on large-scale land use projects are strict, with high land acquisition costs and cumbersome procedures, making the contradiction between the land demand of large thickeners and land resource constraints increasingly prominent.

[0004] 2. Infrastructure and construction cycle issues: Dense compactors have high loads, complex and costly foundation treatment; at the same time, the equipment needs to be installed outdoors, resulting in a long construction cycle and significant weather impact, which delays the project's commissioning schedule.

[0005] 3. Reagent dependence and impact on subsequent processes: To accelerate settling, traditional thickeners (especially for tailings treatment) require the addition of flocculants, resulting in reagent residues that affect the quality of overflow water reuse and the stability of subsequent backfill. In addition, flotation reagent residues make the concentrate foam highly viscous, and some concentrate enters the overflow with the foam, causing metal loss.

[0006] 4. Operational stability and risk issues: The core components of traditional thickeners (such as rake frames and transmission systems) are bulky and heavy. Although they are equipped with automatic monitoring and control technology, they require shutdown and pool cleaning after failure (generally there is no backup unit), and the processing cycle can last for several weeks, which seriously affects the continuous production of the concentrator. Moreover, due to fluctuations in ore properties and capacity adjustments, overflow is prone to "turbidity", which can impact subsequent production processes.

[0007] 5. Energy consumption and resource utilization issues: Traditional thickeners occupy a large area and are limited by terrain, so they can generally only be installed at a low position. The underflow is difficult to achieve gravity flow, resulting in high energy consumption during transportation. The overflow water has a high content of suspended solids (SS) and a low reuse rate (usually less than 80%), resulting in serious waste of water resources.

[0008] 6. Limited adaptability: It has low concentration efficiency for "poor, fine and complex" ores, slow settling speed, and without the addition of flocculants, it is difficult to meet the transportation requirements of high-concentration underflow (above 50%), and it cannot cope with the changes in processing volume caused by fluctuations in ore properties.

[0009] Therefore, it is necessary to design a product dehydration optimization method based on inclined box thickener and HNS ultrafiltration to solve the problems existing in the current technology. Summary of the Invention

[0010] In view of this, the present invention proposes a product dewatering optimization method based on a slanted box thickener and classifier and an HNS ultrafiltration unit, which aims to solve the problems of poor stability in the concentration process, large fluctuations in underflow concentration, and low slurry dewatering efficiency.

[0011] This invention proposes an optimized product dehydration method based on a slanted box thickener and classifier and an HNS ultrafiltration unit, including: The slurry to be processed is fed into a vibrating inclined box thickener classifier through a feeding and distribution system. The vibrating inclined box thickener classifier is controlled in coordination with an intermittent vibration system and a slurry concentration detection and control system. The slurry concentration detection and control system collects slurry concentration data in real time through a concentration sensor installed on the underflow pipeline, compares the collected slurry concentration data with a slurry concentration threshold, and generates vibration parameter adjustment instructions based on the comparison results. The intermittent vibration system dynamically adjusts the vibration frequency, vibration amplitude, and vibration period according to the vibration parameter adjustment instructions generated by the slurry concentration detection and control system. The overflow slurry from the vibrating inclined box thickener is transported to the HNS ultrafilter via a slurry conveying system. The HNS ultrafilter is a circular filter cartridge structure. It uses a centrifugal force field to press the suspended particles in the slurry against the filter membrane surface and employs a cross-flow filtration mode. When the slurry passes through the filter membrane, water and extremely fine particles pass through the filter membrane to form filtrate, while fine particles are trapped on the filter membrane surface and concentrated to form concentrated slurry. The filtrate flows into a high-level water tank by gravity, and the filtrate in the high-level water tank is divided into two paths based on the clear water self-circulation system; one path is allocated to different stages of the mineral processing production process according to production needs; the other path is used as cleaning water to rinse the HNS ultrafilter. The concentrated slurry produced by the HNS ultrafiltration unit is transported to the merging pipeline via a conveying device. It then merges with the high-concentration underflow from the vibrating inclined box thickener in the merging pipeline for output or returns to the previous process.

[0012] Furthermore, it also includes: The vibrating inclined box thickener and classifier and the HNS ultrafilter adopt a modular unit configuration. Each unit is equipped with a backup channel and connected by an automatic switching valve. When any unit fails, the control system shuts down the faulty unit and opens the backup unit, and triggers the alarm system.

[0013] Furthermore, when the slurry concentration detection and control system collects slurry concentration data in real time through a concentration sensor installed on the underflow pipeline, it includes: The concentration sensor uses non-contact measurement technology, is installed on the outer wall of the underflow pipeline, and is periodically self-calibrated using a built-in reference material. When collecting slurry concentration data, the raw signal collected by the concentration sensor is amplified and filtered by the signal conditioning circuit to eliminate environmental interference factors.

[0014] Furthermore, when comparing the collected slurry concentration data with the slurry concentration threshold, and generating vibration parameter adjustment instructions based on the comparison results, the following steps are taken: The slurry concentration threshold includes a lower limit slurry concentration threshold and an upper limit slurry concentration threshold, wherein the lower limit slurry concentration threshold is less than the upper limit slurry concentration threshold; When the collected slurry concentration data is less than the lower limit slurry concentration threshold, the slurry concentration detection and control system generates vibration parameter adjustment instructions to increase the vibration frequency, increase the vibration amplitude, and extend the vibration period. When the collected slurry concentration data is greater than the upper limit slurry concentration threshold, the slurry concentration detection and control system generates vibration parameter adjustment instructions to reduce vibration frequency, reduce vibration amplitude, and shorten vibration period. When the collected slurry concentration data is greater than or equal to the lower limit slurry concentration threshold and less than or equal to the upper limit slurry concentration threshold, the slurry concentration detection and control system generates a command to maintain the current vibration parameters.

[0015] Furthermore, when the intermittent vibration system dynamically adjusts the vibration frequency, vibration amplitude, and vibration period according to the vibration parameter adjustment command generated by the slurry concentration detection and control system, it includes: The intermittent vibration system includes a vibration motor, an eccentric wheel mechanism, and a vibration control module. After receiving a vibration parameter adjustment command, the vibration control module adjusts the speed of the vibration motor through a frequency converter to change the vibration frequency, adjusts the eccentricity of the eccentric wheel mechanism to change the vibration amplitude, and controls the start and stop time of the vibration motor to change the vibration period.

[0016] Furthermore, when the overflow slurry from the vibrating inclined box thickener is transported to the HNS ultrafilter via a slurry conveying system, the following steps are included: The slurry conveying system includes a pump tank, a slurry pump, a pressure sensor, and a regulating valve. The slurry pump is equipped with a frequency converter. The pressure sensor monitors the pressure changes of the slurry in real time. The regulating valve adjusts its opening degree according to the feedback signal from the pressure sensor.

[0017] Furthermore, the HNS ultrafilter has a circular filter cartridge structure, and when suspended particles in the slurry are pressed against the filter membrane surface by a centrifugal force field, it includes: The HNS ultrafilter has a circular filter cartridge structure with a filter medium inside, which is a micron-sized filter membrane. The radial acceleration generated by the centrifugal force field presses the suspended particles in the slurry against the surface of the filter membrane. Water and extremely fine particles pass through the filter membrane to form filtrate, while fine particles form slurry.

[0018] Furthermore, when using cross-flow filtering mode, it includes: During the cross-flow filtration mode, the slurry flows onto the surface of the filter membrane. The flow rate is controlled by adjusting the flow rate of the feed pump. When an increase in the pressure difference on the filter membrane surface is detected, the pressure of the feed pump is reduced to improve the filtration efficiency.

[0019] Furthermore, when the filtrate in the elevated water tank is distributed to different stages of the mineral processing flow according to production needs based on the clear water self-circulation system, this includes: The clean water self-circulation system includes a flow meter and a control system. The control system adjusts the opening of the regulating valve according to the flow ratio and monitors the flow in real time according to the flow meter.

[0020] Compared with existing technologies, the beneficial effects of this invention are: significantly improving space utilization efficiency and reducing land use costs. For example, by adopting a modular combination of two vibrating inclined box thickeners (each with a settling area of ​​3600㎡) and HNS ultrafilters (8 units occupying 400㎡), the total land area is only about 1276㎡, which is only 19% of the traditional thickener with a diameter of 90m (6640㎡). This significantly reduces land occupation, lowers land acquisition costs and reduces the difficulty of overall layout, making it particularly suitable for mining projects with limited land. Significantly reduced infrastructure investment and operating costs: Initial investment: The combined process saves approximately RMB 14.1 million compared to traditional processes (taking a 10,000 t / d project as an example), and avoids the high foundation treatment costs of traditional thickeners. Energy costs: Daily electricity consumption is reduced by approximately 3096 kWh compared to traditional processes (taking a 10,000 t / d project as an example), resulting in annual electricity savings of over RMB 650,000. Chemical costs: The HNS ultrafiltration unit uses pure physical filtration, eliminating the need for flocculants and removing the continuous costs associated with chemical consumption in traditional processes, while also avoiding the impact of chemical residues on subsequent processes. Shortened construction cycle and improved project commissioning efficiency: Traditional thickeners require lengthy foundation construction and equipment installation, typically exceeding 6 months; while the combined process, with its high modularity, can be manufactured, installed, and delivered within 90 calendar days, significantly shortening the project construction cycle and enabling earlier capacity release. Improved operational stability and reduced production risks are achieved through modular backup design: both the vibrating inclined box thickener and classifier support backup unit configurations, allowing for rapid switching in case of single-unit failure, avoiding the downtime risks caused by the lack of backup equipment in traditional processes (traditional thickener failure handling typically takes several weeks); anti-clogging and early warning mechanisms: the vibrating inclined box thickener and classifier prevents clogging of the settling channel through intermittent vibration and is equipped with an automatic early warning system; the filter rods of the HNS ultrafilter can be regenerated, reducing the risk of equipment jamming and ensuring continuous production. Optimized treatment effect, improved resource utilization, and stable underflow concentration: The vibrating inclined box thickener classifier achieves an underflow concentration of over 55% through mechanical forced discharge, meeting the requirements of subsequent flotation, filling, and other processes; compliant overflow water quality: The HNS ultrafilter has a filtration accuracy of 0.1μm, with overflow suspended solids (SS) ≤80mg / L and chemical oxygen demand (COD) and other indicators not exceeding the feed values, allowing direct reuse in the production process, increasing water recycling rate to over 95% and reducing fresh water consumption; reduced metal loss: The ultrafilter can recover residual concentrate powder in the overflow, increasing concentrate utilization rate to over 99% and reducing metal loss. Adaptable to complex working conditions, enhancing process flexibility, and highly adaptable to "lean, fine, and complex" ores, capable of handling fluctuations in ore properties and capacity adjustments (through adding or removing module units to adjust processing volume); fully utilizing site elevation differences for optimized layout: the vibrating inclined box thickener classifier can be fed at a low level by gravity, while the HNS ultrafilter is positioned at a high level, reducing pumping requirements and lowering energy consumption and pipeline maintenance costs.Meets green mining requirements, contributing to environmental compliance, reducing land excavation and the construction of large pools, and minimizing disturbance to the ecological environment; no flocculant is added, avoiding pollution of soil and water by chemical residues and ensuring the stability of the backfill; a high proportion of water recycling reduces wastewater discharge, meets national environmental emission standards, and helps mines achieve the goals of "energy saving, consumption reduction, and environmental protection." The vibrating inclined box thickener classifier uses mechanical forced discharge, resulting in high underflow concentration, meeting the needs of subsequent flotation and backfilling processes. The HNS ultrafilter has a filtration accuracy of 0.1μm, with overflow suspended solids (SS) ≤80mg / L and chemical oxygen demand (COD) not exceeding the feed values, allowing direct reuse in the production process, improving water recycling efficiency and reducing fresh water consumption. The HNS ultrafilter can recover residual powder in the overflow, improving utilization and reducing metal loss. The high-load settling characteristics of a vibrating inclined box thickener are utilized to achieve initial slurry concentration, producing a high-concentration underflow. The overflow is then deeply purified using the micron-level shallow filtration technology of the HNS ultrafiltration unit, forming a two-stage closed-loop treatment process of "coarse separation - fine filtration," ensuring that both the underflow concentration and overflow water quality meet standards. Non-contact concentration sensors are installed on the underflow pipeline to collect slurry concentration signals in real time. These signals are then amplified and filtered using signal conditioning circuitry, reducing detection errors caused by external electromagnetic interference. Based on the concentration threshold, vibration parameter adjustment commands are dynamically generated, automatically adjusting the vibration frequency, amplitude, and period of the vibrating inclined box thickener, achieving closed-loop control of the concentration state and making the underflow concentration more stable and reliable. Intermittent vibration operation enhances the particle settling and classification process. The overflow slurry is stably transported to the HNS ultrafiltration unit via a slurry delivery system, where efficient particle separation is achieved under the action of centrifugal force and cross-flow filtration. This synergistic process improves solid-liquid separation efficiency, reduces membrane load, and decreases the need for membrane fouling and frequent cleaning. The concentration detection and control system and the vibration control module communicate in real time via a signal bus, forming a two-way feedback mechanism between concentration and vibration. This dynamically adjusts the equipment's operating status, reducing energy consumption and preventing excessive or insufficient vibration. The HNS ultrafilter's circular filter cartridge generates a stable centrifugal force field, ensuring that suspended particles are evenly distributed on the filter membrane surface, preventing localized sludge accumulation. In cross-flow filtration mode, high filtrate throughput is maintained, extending the filter membrane's lifespan. The vibrating inclined box thickener and classifier adopt a modular unit configuration with each unit connected by an automatic switching valve. When any unit fails, it automatically switches to the backup channel and triggers an alarm, enabling maintenance without shutdown and improving continuous operation capability and safety. The filtrate is diverted and reused through an elevated water tank and a clean water self-circulation system. Part of it is used for equipment flushing, and the other part is returned to the mineral processing process, forming a closed-loop circulating water system. This reduces the amount of fresh water replenishment, lowering water discharge and environmental impact. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart of a product dehydration optimization method based on a slanted box thickener and HNS ultrafiltration unit provided in an embodiment of the present invention; Figure 2 The flowchart illustrates the principle of the combined concentration and dehydration process of the product dehydration optimization method based on the inclined box thickener and classifier and the HNS ultrafiltration unit provided in this embodiment of the invention. Detailed Implementation

[0022] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Existing dewatering processes mostly employ traditional thickeners, which generally suffer from low dewatering efficiency, high energy consumption, and poor system stability. During operation, thickeners cannot dynamically adjust to changes in slurry concentration, leading to large fluctuations in underflow concentration and a tendency for insufficient settling, resulting in overflow and turbidity. The thickening process lacks electrical signal linkage and closed-loop control, failing to achieve intelligent coordination between concentration detection and pressure control. This results in sluggish system response and low operational efficiency and reliability.

[0024] For this, please refer to Figure 1-2 As shown, an optimized product dehydration method based on a slanted box thickener and classifier and an HNS ultrafiltration unit is proposed, including: S100: The slurry to be processed is introduced into the vibrating inclined box thickener classifier through the feeding and distribution system, and the vibrating inclined box thickener classifier is vibrated through the coordinated control of the intermittent vibration system and the slurry concentration detection and control system. The slurry concentration detection and control system collects slurry concentration data in real time through the concentration sensor installed on the underflow pipeline, compares the collected slurry concentration data with the slurry concentration threshold, and generates vibration parameter adjustment instructions based on the comparison results. The intermittent vibration system dynamically adjusts the vibration frequency, vibration amplitude and vibration period according to the vibration parameter adjustment instructions generated by the slurry concentration detection and control system. S200: The overflow slurry from the vibrating inclined box thickener is transported to the HNS ultrafilter through the slurry conveying system. The HNS ultrafilter has a circular filter cartridge structure. The suspended particles in the slurry are pressed against the filter membrane surface by the centrifugal force field, and cross-flow filtration is used. When the slurry passes through the filter membrane, water molecules and small particles pass through the filter membrane to form filtrate, while large particles are trapped on the filter membrane surface and concentrated to form concentrated slurry. S300: The filtrate flows into the high-level water tank by gravity. Based on the clear water self-circulation system, the filtrate in the high-level water tank is divided into two paths: one path is distributed to different stages of the mineral processing production process according to production needs; the other path is used as cleaning water to rinse the HNS ultrafilter. S400: The concentrated slurry produced by the HNS ultrafiltration unit is transported to the merging pipeline via a conveying device, where it is combined with the high-concentration underflow from the vibrating inclined box thickener and classifier and output or returned to the previous process.

[0025] The process involves uniformly feeding the slurry into a vibrating inclined box thickener classifier via a feeding distribution system. During this process, an intermittent vibration system and a slurry concentration detection and control system work together to vibrate the thickener. A non-contact concentration sensor is installed on the underflow pipeline to collect slurry concentration data in real time. This data is compared with a preset slurry concentration threshold, and vibration parameter adjustment commands are generated based on the comparison results. The intermittent vibration system dynamically adjusts the vibration frequency, amplitude, and period to achieve adaptive control of the slurry concentration, ensuring stable underflow concentration and optimal settling. The overflow slurry from the vibrating inclined box thickener classifier is smoothly transported to the HNS ultrafilter via a slurry conveying system. This ultrafilter uses a circular filter cartridge structure, employing centrifugal force to press suspended particles in the slurry against the filter membrane surface, while a cross-flow filtration mode separates the slurry. During filtration, water molecules and small particles permeate through the filter membrane to form filtrate, while larger particles are retained on the filter membrane surface and gradually concentrated to form concentrated slurry, thus achieving efficient solid-liquid separation. The filtrate flows by gravity to a high-level water tank, where it is divided into two streams through a clean water self-circulation system: one stream is distributed back to different stages of the mineral processing according to production process requirements, achieving water resource recycling and continuous production operation; the other stream is used as cleaning water to flush the HNS ultrafilter, preventing filter media accumulation or clogging. The concentrated slurry produced by the HNS ultrafilter is transported to a merging pipeline via conveying equipment, where it merges with the high-concentration underflow from the vibrating inclined box thickener in the pipeline for output slurry or is returned to the previous process.

[0026] The slurry concentration thresholds include two categories: a lower limit and an upper limit. The lower limit indicates insufficient concentration of the underflow slurry, while the upper limit indicates the risk of over-concentration or blockage. The lower limit is typically calculated based on the slurry's minimum settling rate, particle density, and thickener tank volume to ensure a stable concentrated layer is formed even under minimal settling conditions. The upper limit is determined by the ultrafiltration membrane's flux capacity, its anti-fouling properties, and the vibrating classifier's maximum underflow discharge capacity.

[0027] The working process and principle are as follows: the product dewatering method achieves efficient solid-liquid separation through the synergistic action of a vibrating inclined box thickener and classifier and an HNS ultrafiltration unit. The slurry to be treated is uniformly introduced into the vibrating inclined box thickener and classifier through a feeding distribution system. An intermittent vibration system and a slurry concentration detection and control system work together to control the vibration operation, achieving slurry classification and sedimentation. A non-contact concentration sensor on the underflow pipeline collects slurry concentration data in real time, compares it with a preset slurry concentration threshold, and generates vibration parameter adjustment commands through the control system. The intermittent vibration system dynamically adjusts the vibration frequency, amplitude, and period according to the commands to ensure stable underflow concentration, uniform sedimentation layer, and prevent excessively dilute or concentrated conditions. The overflow slurry from the vibrating inclined box thickener and classifier is smoothly transported to the HNS ultrafiltration unit via a slurry conveying system. The circular filter cartridge structure generates a centrifugal force field, pressing suspended particles against the filter membrane surface. Simultaneously, a cross-flow filtration mode is used, allowing water molecules and small particles to pass through the filter membrane to form filtrate, while larger particles gradually accumulate and concentrate on the filter membrane surface to form discharged slurry, achieving efficient solid-liquid separation. The resulting filtrate flows by gravity to a high-level water tank, where it is divided into two streams through a clean water self-circulation system: one stream is returned to the mineral processing flow according to process requirements, realizing water resource recycling; the other stream is used to flush the HNS ultrafilter to prevent slurry adhesion and clogging. The concentrated slurry produced by the HNS ultrafilter is transported to a merging pipeline via conveying equipment, where it merges with the thickener underflow for output or returns to the previous process.

[0028] As a preferred embodiment, the solution of this application is implemented as follows: Taking a certain processing system as an example, the slurry to be processed is uniformly introduced into a vibrating inclined box thickener and classifier through a feeding distribution system. Under the coordinated control of an intermittent vibration system and a slurry concentration detection and control system, the solid content of the underflow of the thickener is monitored and adjusted in real time. A non-contact concentration sensor installed on the underflow pipeline continuously collects slurry concentration data and compares it with a preset concentration threshold. When the concentration is lower than the lower threshold, the vibration frequency and amplitude are automatically increased to prolong the settling time; when the concentration is higher than the upper threshold, the vibration intensity is reduced to prevent clogging, thereby achieving dynamic and stable control of the slurry concentration. The overflow slurry of the thickener is smoothly transported to the HNS ultrafilter through a slurry conveying system. The ultrafilter adopts a circular filter cartridge structure, which uses a centrifugal force field to press suspended particles against the filter membrane surface and uses a cross-flow filtration mode for separation. Small particles and water pass through the filter membrane to form a clear liquid, while large particles are intercepted and form a concentrated discharge slurry. The filtrate flows by gravity to an elevated water tank, where it is divided into two streams via a clean water self-circulation system: one stream is allocated to different stages of the mineral processing according to the production process, achieving water reuse; the other stream is used to flush the HNS ultrafilter to prevent sedimentation and clogging. The concentrated slurry produced by the ultrafilter is combined with the thickener underflow through a conduit and either output or returned to the previous process. Actual operation data shows that this method can stably maintain the solids content of the thickener underflow at 53%-55%, increase the filtrate permeability by 15%, improve continuous operation stability and product dewatering efficiency, and reduce the frequency of manual cleaning and energy consumption.

[0029] Through the above scheme, this application achieves stable underflow concentration within a set threshold range by using intermittent vibration of the vibrating inclined box thickener and closed-loop control of slurry concentration. Combined with centrifugal cross-flow filtration of the HNS ultrafilter, this improves the solid-liquid separation rate and filtrate permeability. The slurry concentration detection system and dynamic adjustment of vibration parameters form a closed-loop control, preventing clogging or uneven sedimentation caused by excessively thin or thick slurry, ensuring a continuous and stable product dewatering process. Simultaneously, the slurry conveying system smoothly delivers the slurry, reducing equipment vibration impact. The clean water self-circulation system divides the filtrate into two paths: one for rinsing the HNS ultrafilter, reducing the frequency of manual cleaning; the other is recycled for mineral processing, achieving water resource recycling and reducing production water consumption and energy consumption. A combined pipeline merges the underflow from the vibrating inclined box thickener and the ultrafiltration concentrate discharge.

[0030] This application further proposes that includes: The vibrating inclined box thickener and classifier adopt a modular unit configuration, with backup channels set between each unit and connected by an automatic switching valve. When any unit fails, the control system shuts down the faulty unit and opens the backup unit, and triggers the alarm system.

[0031] Both the vibrating inclined box thickener and the HNS ultrafilter adopt a modular unit configuration. Each system consists of several independent working units, which are interconnected through backup channels and automatic switching valves to achieve redundant control and rapid switching. When any working unit malfunctions or experiences performance abnormalities, the control system can detect and determine the status of the faulty unit in real time, automatically shutting off the feed and discharge channels of the faulty unit. Simultaneously, it quickly activates the corresponding backup unit through the switching valve to ensure the continuous and uninterrupted operation of the entire product dewatering system. At the same time, the system triggers an alarm mechanism, uploading fault information, the faulty unit number, and the fault type to the control terminal or monitoring system in real time, facilitating remote monitoring and maintenance by operators. The modular configuration not only improves the reliability and safety of the equipment but also shortens the fault switching response time, reduces production downtime losses, and gives the system strong scalability and ease of maintenance.

[0032] As a preferred embodiment, the solution of this application is implemented as follows: Taking a product dewatering system as an example, both the vibrating inclined box thickener and classifier and the HNS ultrafilter adopt a modular unit configuration. Each system consists of two to three independent units, which are connected through a backup channel and an automatic switching valve. In daily production, when the main working unit malfunctions, such as a sudden drop in the solids content at the bottom of the thickener, an abnormal vibration motor, or a clogged ultrafilter cartridge, the control system can monitor the fault signal in real time and immediately shut down the feed and discharge channels of the faulty unit. At the same time, it automatically activates the backup unit to continue processing the slurry, ensuring that the product dewatering process is not interrupted. Simultaneously, an alarm is triggered, sending the fault type, unit number, and fault time information to the central control room and the field operation terminal. Operators can quickly troubleshoot and maintain the faulty unit according to the prompts.

[0033] Through the above technical solution, this application sets up backup channels between each unit and connects them through automatic switching valves. This allows the system to automatically shut down the faulty unit and activate the backup unit when any unit fails, achieving seamless switching and ensuring continuous slurry processing. This avoids production interruptions or slurry accumulation caused by equipment downtime. The alarm system can provide real-time feedback on faulty unit information, including fault type, location, and time of occurrence, facilitating quick troubleshooting and maintenance by operators, thereby reducing the frequency of manual intervention and maintenance costs. This modular design not only enhances the system's safety and redundancy but also improves the overall processing efficiency of the production line. The number of units can be flexibly expanded according to production needs, achieving efficient, stable, and intelligent product dewatering operations.

[0034] This application further proposes a slurry concentration detection and control system that, when collecting slurry concentration data in real time through a concentration sensor installed on the underflow pipeline, includes: The concentration sensor uses non-contact measurement technology, is installed on the outer wall of the underflow pipeline, and is periodically self-calibrated using a built-in reference material; When collecting slurry concentration data, the raw signal collected by the concentration sensor is amplified and filtered by the signal conditioning circuit to eliminate environmental interference factors.

[0035] The slurry concentration detection and control system uses a concentration sensor installed on the outer wall of the underflow pipeline of the vibrating inclined box thickener to collect slurry concentration data in real time, enabling continuous monitoring of the slurry solid-liquid ratio. The concentration sensor employs non-contact measurement technology, sensing the slurry concentration inside the tube through electromagnetic or optical principles, eliminating the need for direct contact with the slurry and thus avoiding sensor wear and clogging. The sensor contains a reference material for periodic self-calibration, ensuring stable and reliable measurement accuracy over long-term operation. During data acquisition, the raw signal is amplified by a built-in signal conditioning circuit and filtered to eliminate the influence of environmental interference, pipeline vibration, and electromagnetic noise on measurement accuracy, resulting in more accurate and stable slurry concentration data.

[0036] As a preferred embodiment, the solution of this application is implemented as follows: Taking a copper product dehydration system as an example, a non-contact concentration sensor is installed on the underflow pipeline of a vibrating inclined box thickener classifier to monitor the solid-liquid concentration of the slurry in real time through optical or electromagnetic measurement principles. The sensor is fixed to the outer wall of the pipeline, eliminating the need for direct contact with the slurry and avoiding measurement failures caused by high wear or particle blockage during long-term operation. The sensor contains a reference material and can self-calibrate at set time intervals to ensure that the concentration data remains highly accurate during continuous operation for weeks or even months. The acquired raw signal is first amplified by a built-in signal conditioning circuit, and then filtered to eliminate noise generated by pipeline vibration, electromagnetic interference, and slurry flow, thereby obtaining a stable and reliable slurry concentration value.

[0037] Through the above technical solution, this application avoids wear, blockage, and corrosion problems because the sensor does not need to be in direct contact with the slurry, thus improving the service life and operational reliability of the equipment. The self-calibration function of the built-in reference material ensures the stability of measurement accuracy during long-term operation, avoiding data deviations caused by environmental changes or equipment aging. The amplification and filtering processing of the signal conditioning circuit eliminates pipeline vibration, electromagnetic interference, and slurry flow noise, making the acquired data more accurate and reliable.

[0038] This application further proposes that when comparing the collected slurry concentration data with the slurry concentration threshold and generating vibration parameter adjustment instructions based on the comparison results, the following steps are included: The slurry concentration threshold includes a lower limit slurry concentration threshold and an upper limit slurry concentration threshold, with the lower limit slurry concentration threshold being lower than the upper limit slurry concentration threshold; When the collected slurry concentration data is less than the lower limit slurry concentration threshold, the slurry concentration detection and control system generates vibration parameter adjustment instructions to increase the vibration frequency, increase the vibration amplitude, and extend the vibration period. When the collected slurry concentration data is greater than the upper limit slurry concentration threshold, the slurry concentration detection and control system generates vibration parameter adjustment instructions to reduce vibration frequency, reduce vibration amplitude, and shorten vibration period. When the collected slurry concentration data is greater than or equal to the lower limit slurry concentration threshold and less than or equal to the upper limit slurry concentration threshold, the slurry concentration detection and control system generates a command to maintain the current vibration parameters.

[0039] The slurry concentration detection and control system compares real-time slurry concentration data with preset slurry concentration thresholds to achieve dynamic closed-loop control of the vibration parameters of the vibrating inclined box thickener classifier. The concentration thresholds include a lower limit and an upper limit, with the lower limit being smaller than the upper limit, defining the reasonable fluctuation range of the slurry concentration. When the real-time slurry concentration is below the lower limit, the system determines the slurry is too thin and generates adjustment commands to increase the vibration frequency, amplitude, and cycle to improve the settling velocity of solid particles and the underflow concentration, thus ensuring the slurry thickening effect. When the concentration is above the upper limit, the system determines the slurry is too thick and generates commands to reduce the vibration frequency, amplitude, and cycle to prevent equipment overload or slurry blockage, ensuring the safe and stable operation of the vibration system. When the concentration is between the lower and upper limits, commands are generated to maintain the current vibration parameters, ensuring the underflow concentration remains stable within the target range.

[0040] As a preferred embodiment, the solution of this application is implemented as follows: Taking a certain processing system as an example, a real-time concentration detection sensor is installed on the underflow pipeline of the vibrating inclined box thickener classifier. When the slurry concentration is collected below the lower limit threshold (e.g., 30% solid content), the control system automatically generates instructions to increase the vibration frequency, increase the vibration amplitude, and extend the vibration cycle, so that the solid particles in the thin slurry settle faster and ensure that the underflow concentration reaches the set target. When the collected concentration is higher than the upper limit threshold (e.g., 60% solid content), instructions are generated to reduce the vibration frequency, reduce the vibration amplitude, and shorten the vibration cycle to prevent the overly concentrated slurry from causing blockage or overload to the equipment, while avoiding poor flow of filtrate on the surface of the vibrating inclined box. When the concentration is within the threshold range (30% to 60%), the current vibration parameters are maintained to ensure the stability of the underflow concentration.

[0041] Through the above technical solutions, when the concentration is below the lower threshold, increasing the vibration frequency, increasing the vibration amplitude, and extending the vibration cycle can accelerate the settling speed of solid particles in the thin slurry, improve the underflow concentration, and ensure the concentration effect; when the concentration is above the upper threshold, reducing the vibration frequency, decreasing the vibration amplitude, and shortening the vibration cycle can prevent the slurry from being too concentrated, causing equipment blockage, vibration system overload, or excessive wear, and extend the service life of the equipment; when the concentration is within the threshold range, maintaining the current vibration parameters keeps the underflow concentration stable.

[0042] This application further proposes that when an intermittent vibration system dynamically adjusts the vibration frequency, vibration amplitude, and vibration period according to the vibration parameter adjustment instructions generated by the slurry concentration detection and control system, it includes: The intermittent vibration system includes a vibration motor, an eccentric wheel mechanism, and a vibration control module. After receiving the vibration parameter adjustment command, the vibration control module adjusts the speed of the vibration motor through a frequency converter to change the vibration frequency, adjusts the eccentricity of the eccentric wheel mechanism to change the vibration amplitude, and controls the start and stop time of the vibration motor to change the vibration period.

[0043] During the product dewatering optimization process, the intermittent vibration system, based on vibration parameter adjustment commands generated by the slurry concentration detection and control system, can dynamically adjust the vibration state of the vibrating inclined box thickener in real time. It mainly includes a vibrating motor, an eccentric wheel mechanism, and a vibration control module. When the control module receives the vibration parameter adjustment command, it adjusts the motor speed via a frequency converter connected to the vibrating motor, thereby changing the vibration frequency and achieving precise control of the slurry settling velocity. The vibration control module adjusts the vibration amplitude by adjusting the eccentricity of the eccentric wheel mechanism to adapt to the settling characteristics of slurries with different concentrations, ensuring stable underflow concentration. The start and stop times of the vibrating motor are precisely controlled by the control module, thereby changing the vibration cycle to match the vibration operation cycle with the slurry flow rate, solid content, and equipment load.

[0044] As a preferred embodiment, the solution of this application is implemented as follows: In the dewatering section of a certain product, the slurry to be treated enters the vibrating inclined box thickener classifier through the feeding distribution system. When the slurry concentration is lower than the set lower threshold, the slurry concentration detection and control system generates a vibration parameter adjustment command and sends it to the vibration control module. The control module then starts the frequency converter, increases the speed of the vibrating motor, and increases the vibration frequency from the original 5Hz to 7Hz. At the same time, by adjusting the eccentricity of the eccentric wheel mechanism, the vibration amplitude is increased from the original 3mm to 5mm, and the vibration cycle is extended, so that the residence time of the slurry in the inclined box is increased, the solid particles are accelerated to settle, and the underflow concentration is increased. When the slurry concentration exceeds the upper threshold, the control module reduces the speed of the vibrating motor, reduces the vibration frequency to 4Hz, adjusts the eccentricity to reduce the vibration amplitude to 2mm, and shortens the vibration cycle to prevent the slurry from being too concentrated and clogging the equipment or causing uneven slurry filtration.

[0045] Through the above technical solution, the vibration control module of this application automatically generates vibration parameter adjustment instructions based on the collected slurry concentration data, and precisely controls the vibration frequency by adjusting the speed of the vibration motor through a frequency converter, so that the vibration frequency can be increased or decreased in real time according to the change of slurry concentration, thereby ensuring particle settling efficiency; by adjusting the eccentricity of the eccentric wheel mechanism, the vibration amplitude can be flexibly changed, so that the vibration intensity can adapt to the solid-liquid separation requirements of slurries with different concentrations, preventing the slurry from being too thin or too thick and affecting the settling effect.

[0046] This application further proposes a method for conveying the overflow slurry from a vibrating inclined box thickener to an HNS ultrafilter via a slurry conveying system, including: The slurry conveying system includes a pump tank, a slurry pump, a pressure sensor, and a regulating valve. The slurry pump is equipped with a frequency converter; the pressure sensor monitors the pressure changes of the slurry in real time; and the regulating valve adjusts its opening degree according to the feedback signal from the pressure sensor.

[0047] The slurry overflowing from the vibrating inclined box thickener is transported to the HNS ultrafilter via a slurry delivery system to ensure continuous and stable slurry delivery. The slurry delivery system includes a pump tank, a slurry pump, a pressure sensor, and a regulating valve. The slurry pump is equipped with a frequency converter, which controls the pump to evenly distribute the slurry flow, eliminate instantaneous flow fluctuations, and mitigate pulsating pressure, thereby stabilizing the flow and pressure of the overflow slurry and preventing localized scouring or accumulation during transport. The pressure sensor collects slurry pressure data in real time and feeds back the collected pressure change information to the control system to reflect immediate changes in the slurry flow state. The regulating valve automatically adjusts its opening based on the feedback signal from the pressure sensor, achieving dynamic balance regulation of the slurry flow. When the pressure is too high, the valve opens slightly to reduce the pressure; when the pressure is too low, the valve closes slightly to increase the pressure, ensuring that the slurry delivered to the HNS ultrafilter is always within the optimal pressure range.

[0048] As a preferred embodiment, the solution of this application is implemented as follows: In practical applications, such as in a certain processing system, the vibrating inclined box thickener classifier concentrates the slurry and overflows into the slurry conveying system. The slurry pump is equipped with a frequency converter to smoothly distribute the high-concentration slurry flowing from the vibrating inclined box thickener classifier, eliminating flow and pressure fluctuations caused by intermittent vibration, and ensuring stable pressure before the slurry flows into the HNS ultrafilter. A pressure sensor monitors changes in slurry pressure in real time. When a sudden increase in inlet pressure is detected, the regulating valve will immediately open automatically at a certain angle to reduce the pressure; when the outlet pressure drops too low, the regulating valve will close appropriately to increase the pressure.

[0049] Through the above technical solution, the slurry pump of this application is equipped with a frequency converter, which can uniformly disperse the slurry flow and effectively smooth the flow fluctuations and pressure peaks caused by intermittent vibration. This ensures that the slurry entering the HNS ultrafiltration membrane maintains a stable flow rate and pressure, thereby preventing damage to the filter membrane from impact and ensuring uniform filtrate throughput. A pressure sensor monitors slurry pressure changes in real time. When an abnormal pressure is detected, the regulating valve can automatically adjust its opening based on the feedback signal, achieving rapid response and precise control, maintaining optimal operating conditions.

[0050] This application further proposes that the HNS ultrafiltration device has a circular filter cartridge structure, and when suspended particles in the slurry are pressed against the filter membrane surface by a centrifugal force field, it includes: The HNS ultrafiltration unit has a circular filter cartridge structure with a filter medium inside, which is a micron-sized filter membrane. The radial acceleration generated by the centrifugal force field presses the suspended particles in the slurry against the surface of the filter membrane. Water and extremely fine particles pass through the filter membrane to form filtrate, while fine particles form slurry.

[0051] The HNS ultrafiltration unit employs a circular filter cartridge structure, utilizing centrifugal force to efficiently separate and concentrate suspended particles in the slurry. This structure contains a micron-sized filter membrane. During rotation, the radial acceleration generated by the centrifugal force uniformly presses the suspended particles in the slurry against the filter membrane surface, rapidly forming a slurry. Simultaneously, water molecules and extremely small particles pass through the filter membrane to form a clear filtrate.

[0052] Through the above technical solution, this application achieves precise control of the centrifugal force field, so that the suspended particles in the slurry are uniformly deposited on the surface of the micron-sized filter membrane under the action of radial acceleration, forming a filter slurry, which ensures that the entire ultrafiltration system maintains a stable dewatering effect and filtrate output quality under long-term continuous operation.

[0053] This application further proposes that when using cross-flow filtering mode, the following should be included: In cross-flow filtration mode, the slurry flows to the surface of the filter membrane. The flow rate is controlled by adjusting the flow rate of the feed pump. When an increase in the pressure difference on the filter membrane surface is detected, the pressure of the feed pump is reduced to improve the filtration efficiency.

[0054] In the cross-flow filtration mode, the slurry flows along the surface of the filter membrane. By adjusting the flow rate, the velocity of the slurry on the filter membrane surface is controlled, ensuring that suspended particles are continuously carried away during the flow, preventing localized deposition and the formation of excessively concentrated slurry. When an increase in pressure difference is detected on the filter membrane surface, indicating increased local resistance or excessively high slurry concentration, the control system automatically increases the feed pump flow rate and decreases the feed pump pressure based on the pressure difference feedback signal. This enhances the flushing effect of the slurry on the filter membrane surface, thereby maintaining the cleanliness of the filter membrane surface and ensuring a continuous and stable output of filtrate.

[0055] Through the above technical solution, the slurry of this application flows along the surface of the filter membrane, so that suspended particles are continuously carried away during the flow process, preventing the formation of excessively concentrated slurry due to local sedimentation, thereby reducing the risk of filter membrane clogging and extending the service life of the filter membrane. By adjusting the flow rate of the feed pump, the flow velocity of the slurry on the filter membrane surface can be precisely controlled. When an increase in the pressure difference on the filter membrane surface is detected, it indicates that the local resistance of the filter membrane has increased or the slurry concentration is too high. The control system will automatically increase the flow rate of the feed pump, increase the slurry flow velocity, enhance the flushing effect, and keep the slurry uniform and of appropriate thickness.

[0056] This application further proposes a method for distributing the filtrate from a high-level water tank to different stages of the mineral processing flow based on a self-circulating clean water system, including: The clean water self-circulation system includes a flow meter and a control system. The control system adjusts the opening of the regulating valve according to the flow ratio and monitors the flow in real time according to the flow meter.

[0057] In this system, the filtrate from the elevated water tank is distributed to different stages of the mineral processing flow according to production needs through a self-circulating clean water system. Precise flow control ensures efficient utilization of the filtrate. The self-circulating clean water system includes a flow meter and an automatic control system. The flow meter monitors the flow data in the elevated water tank in real time and feeds the data back to the control system. The control system calculates the required distribution based on a preset flow ratio and automatically adjusts the opening of the regulating valve, distributing the water to different production stages according to the mineral processing needs, ensuring stable and balanced water consumption at each stage.

[0058] In the process of distributing filtrate from the elevated water tank to different stages of the mineral processing flow based on a self-circulating clean water system, the rules for setting the flow rate ratio directly affect the product dewatering efficiency and the stability of the mineral processing flow. The target flow rate ratio is determined based on the process water consumption and cleaning requirements of each stage of the mineral processing. The proportion of process water is set at over 95% based on the water demand of the mineral processing equipment and other processes. Cleaning water is required to continuously flush away residual slurry to prevent clogging, and its flow rate should be within 5% of the total filtrate flow. The control system receives real-time filtrate flow data from two flow meters and dynamically adjusts the flow distribution by regulating the opening of the regulating valve to ensure that the actual flow rate ratio remains consistent with the set target.

[0059] Through the above technical solution, this application monitors the flow rate in real time using a flow meter and feeds the data back to the control system. The control system automatically adjusts the opening of the regulating valve according to the preset flow ratio, achieving precise filtrate distribution. The filtrate is then distributed to different stages of the mineral processing flow according to production needs, ensuring a stable water supply at each stage.

[0060] In summary, this approach significantly improves space utilization efficiency and reduces land costs. For example, the modular combination of two vibrating inclined box thickeners (each with a settling area of ​​3600㎡) and HNS ultrafilters (8 units occupying 400㎡) results in a total land area of ​​only about 1276㎡, which is only 19% of that of a traditional 90m diameter thickener (6640㎡). This greatly reduces land occupation, lowers land acquisition costs and reduces the difficulty of overall layout, making it particularly suitable for mining projects with limited land. Significantly reduced infrastructure investment and operating costs: Initial investment: The combined process saves approximately RMB 14.1 million compared to traditional processes (taking a 10,000 t / d project as an example), and avoids the high foundation treatment costs of traditional thickeners. Energy costs: Daily electricity consumption is reduced by approximately 3096 kWh compared to traditional processes (taking a 10,000 t / d project as an example), resulting in annual electricity savings of over RMB 650,000. Chemical costs: The HNS ultrafiltration unit uses pure physical filtration, eliminating the need for flocculants and removing the continuous costs associated with chemical consumption in traditional processes, while also avoiding the impact of chemical residues on subsequent processes. Shortened construction cycle and improved project commissioning efficiency: Traditional thickeners require lengthy foundation construction and equipment installation, typically exceeding 6 months; while the combined process, with its high modularity, can be manufactured, installed, and delivered within 90 calendar days, significantly shortening the project construction cycle and enabling earlier capacity release. Improved operational stability and reduced production risks are achieved through modular backup design: both the vibrating inclined box thickener and classifier support backup unit configurations, allowing for rapid switching in case of single-unit failure, avoiding the downtime risks caused by the lack of backup equipment in traditional processes (traditional thickener failure handling typically takes several weeks); anti-clogging and early warning mechanisms: the vibrating inclined box thickener and classifier prevents clogging of the settling channel through intermittent vibration and is equipped with an automatic early warning system; the filter rods of the HNS ultrafilter can be regenerated, reducing the risk of equipment jamming and ensuring continuous production. Optimized treatment effect, improved resource utilization, and stable underflow concentration: The vibrating inclined box thickener classifier achieves an underflow concentration of over 55% through mechanical forced discharge, meeting the requirements of subsequent flotation, filling, and other processes; compliant overflow water quality: The HNS ultrafilter has a filtration accuracy of 0.1μm, with overflow suspended solids (SS) ≤80mg / L and chemical oxygen demand (COD) and other indicators not exceeding the feed values, allowing direct reuse in the production process, increasing water recycling rate to over 95% and reducing fresh water consumption; reduced metal loss: The ultrafilter can recover residual concentrate powder in the overflow, increasing concentrate utilization rate to over 99% and reducing metal loss. Adaptable to complex working conditions, enhancing process flexibility, and highly adaptable to "lean, fine, and complex" ores, capable of handling fluctuations in ore properties and capacity adjustments (through adding or removing module units to adjust processing volume); fully utilizing site elevation differences for optimized layout: the vibrating inclined box thickener classifier can be fed at a low level by gravity, while the HNS ultrafilter is positioned at a high level, reducing pumping requirements and lowering energy consumption and pipeline maintenance costs.Meets green mining requirements, contributing to environmental compliance, reducing land excavation and the construction of large pools, and minimizing disturbance to the ecological environment; no flocculant is added, avoiding pollution of soil and water by chemical residues and ensuring the stability of the backfill; a high proportion of water recycling reduces wastewater discharge, meets national environmental emission standards, and helps mines achieve the goals of "energy saving, consumption reduction, and environmental protection." The vibrating inclined box thickener classifier uses mechanical forced discharge, resulting in high underflow concentration, meeting the needs of subsequent flotation and backfilling processes. The HNS ultrafilter has a filtration accuracy of 0.1μm, with overflow suspended solids (SS) ≤80mg / L and chemical oxygen demand (COD) not exceeding the feed values, allowing direct reuse in the production process, improving water recycling efficiency and reducing fresh water consumption. The HNS ultrafilter can recover residual powder in the overflow, improving utilization and reducing metal loss. The high-load settling characteristics of a vibrating inclined box thickener are utilized to achieve initial slurry concentration, producing a high-concentration underflow. The overflow is then deeply purified using the micron-level shallow filtration technology of the HNS ultrafiltration unit, forming a two-stage closed-loop treatment process of "coarse separation - fine filtration," ensuring that both the underflow concentration and overflow water quality meet standards. Non-contact concentration sensors are installed on the underflow pipeline to collect slurry concentration signals in real time. These signals are then amplified and filtered using signal conditioning circuitry, reducing detection errors caused by external electromagnetic interference. Based on the concentration threshold, vibration parameter adjustment commands are dynamically generated, automatically adjusting the vibration frequency, amplitude, and period of the vibrating inclined box thickener, achieving closed-loop control of the concentration state and making the underflow concentration more stable and reliable. Intermittent vibration operation enhances the particle settling and classification process. The overflow slurry is stably transported to the HNS ultrafiltration unit via a slurry delivery system, where efficient particle separation is achieved under the action of centrifugal force and cross-flow filtration. This synergistic process improves solid-liquid separation efficiency, reduces membrane load, and decreases the need for membrane fouling and frequent cleaning. The concentration detection and control system and the vibration control module communicate in real time via a signal bus, forming a two-way feedback mechanism between concentration and vibration. This dynamically adjusts the equipment's operating status, reducing energy consumption and preventing excessive or insufficient vibration. The HNS ultrafilter's circular filter cartridge generates a stable centrifugal force field, ensuring that suspended particles are evenly distributed on the filter membrane surface, preventing localized sludge accumulation. In cross-flow filtration mode, high filtrate throughput is maintained, extending the filter membrane's lifespan. The vibrating inclined box thickener and classifier adopt a modular unit configuration with each unit connected by an automatic switching valve. When any unit fails, it automatically switches to the backup channel and triggers an alarm, enabling maintenance without shutdown and improving continuous operation capability and safety. The filtrate is diverted and reused through an elevated water tank and a clean water self-circulation system. Part of it is used for equipment flushing, and the other part is returned to the mineral processing process, forming a closed-loop circulating water system. This reduces the amount of fresh water replenishment, lowering water discharge and environmental impact.

[0061] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0062] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0063] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0064] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for product dewatering optimization based on an inclined box thickener and HNS ultrafilter, characterized in that, The application relates to a slurry concentration detection and control system for a vibrating chute thickener. The slurry to be treated is introduced into the vibrating chute thickener through a feeding distribution system, and the vibrating chute thickener is controlled by a intermittent vibration system and a slurry concentration detection and control system; the slurry concentration detection and control system collects slurry concentration data in real time through a concentration sensor installed on the underflow pipeline, compares the collected slurry concentration data with a slurry concentration threshold value, generates a vibration parameter adjustment instruction according to the comparison result, and the intermittent vibration system dynamically adjusts the vibration frequency, vibration amplitude and vibration period according to the vibration parameter adjustment instruction generated by the slurry concentration detection and control system; The overflow slurry of the vibrating chute thickener is transported to an HNS ultrafilter through a slurry conveying system, the HNS ultrafilter is a circular filter cartridge structure, the suspended particles in the slurry are pressed to the surface of the filter membrane through a centrifugal force field, and a cross-flow filtration mode is adopted for filtration; when the slurry passes through the filter membrane, water and extremely fine particles form filtrate through the filter membrane, and fine particles are intercepted on the surface of the filter membrane and concentrated to form concentrated discharge slurry; The filtrate flows into a high-level water tank, the filtrate in the high-level water tank is divided into two paths based on a clean water self-circulation system; one path is distributed to different links of a mineral processing production process according to production requirements; the other path is used as cleaning water to flush the HNS ultrafilter; The concentrated discharge slurry generated by the HNS ultrafilter is transported to a merging pipeline through conveying equipment, and is merged with the high-concentration underflow of the vibrating chute thickener in the merging pipeline and then output or returned to the previous process.

2. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 1, characterized in that, Further comprising: The vibrating chute thickener and the HNS ultrafilter adopt a modular unit configuration, standby channels are arranged between units, and the channels are connected through automatic switching valves; when any unit fails, the control system closes the fault unit and opens the standby unit, and triggers an alarm system.

3. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 1, characterized in that, When the slurry concentration detection and control system collects slurry concentration data in real time through the concentration sensor installed on the underflow pipeline, comprising: The concentration sensor adopts a non-contact measurement technology, is installed on the outer wall of the underflow pipeline, and is regularly self-calibrated through a built-in reference material; When collecting the slurry concentration data, the original signals collected by the concentration sensor are amplified and filtered based on a signal conditioning circuit, so that environmental interference factors are eliminated.

4. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 3, characterized in that, When the collected slurry concentration data is compared with the slurry concentration threshold value, and a vibration parameter adjustment instruction is generated according to the comparison result, comprising: The slurry concentration threshold value includes a lower slurry concentration threshold value and an upper slurry concentration threshold value, and the lower slurry concentration threshold value is smaller than the upper slurry concentration threshold value; When the collected slurry concentration data is smaller than the lower slurry concentration threshold value, the slurry concentration detection and control system generates a vibration parameter adjustment instruction for increasing the vibration frequency, increasing the vibration amplitude and prolonging the vibration period; When the collected slurry concentration data is greater than the upper slurry concentration threshold value, the slurry concentration detection and control system generates a vibration parameter adjustment instruction for reducing the vibration frequency, reducing the vibration amplitude and shortening the vibration period; When the collected slurry concentration data is greater than or equal to the lower slurry concentration threshold value and smaller than or equal to the upper slurry concentration threshold value, the slurry concentration detection and control system generates a vibration parameter adjustment instruction for maintaining the current vibration parameters.

5. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 4, characterized in that, When the intermittent vibration system dynamically adjusts the vibration frequency, vibration amplitude and vibration cycle according to the vibration parameter adjustment instruction generated by the slurry concentration detection control system, the method comprises the following steps: The intermittent vibration system comprises a vibration motor, an eccentric mechanism and a vibration control module. After receiving the vibration parameter adjustment instruction, the vibration control module adjusts the rotation speed of the vibration motor through the frequency converter to change the vibration frequency, adjusts the eccentric distance of the eccentric mechanism to change the vibration amplitude, and controls the start-stop time of the vibration motor to change the vibration cycle.

6. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 5, characterized in that, When the overflow slurry of the vibrating inclined box thickener classifier is transported to the HNS ultrafilter through the slurry conveying system, the method comprises the following steps: The slurry conveying system comprises a pump pool, a slurry pump, a pressure sensor and an adjusting valve. The slurry pump is provided with a frequency conversion device. The pressure sensor monitors the pressure change of the slurry in real time. The adjusting valve adjusts the opening degree according to the feedback signal of the pressure sensor.

7. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 6, characterized in that, The HNS ultrafilter is a circular filter cartridge structure. When the suspended particles in the slurry are pressed to the surface of the filter membrane through the centrifugal field, the method comprises the following steps: The HNS ultrafilter is a circular filter cartridge structure. The inside is provided with a filter medium. The filter medium is a micron-level filter membrane. The radial acceleration generated by the centrifugal field presses the suspended particles in the slurry to the surface of the filter membrane. Water and extremely fine particles form filtrate through the filter membrane, and fine particles form filter slurry.

8. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 7, characterized in that, When the cross-flow filtration mode is used for filtration, the method comprises the following steps: When the cross-flow filtration mode is used for filtration, the slurry flows through the surface of the filter membrane. The flow rate is controlled by adjusting the flow of the feed pump. When the pressure difference on the surface of the filter membrane is detected to increase, the pressure of the feed pump is reduced, and the filtration efficiency is improved.

9. The product dewatering optimization method based on an inclined box thickener and HNS ultrafilter according to claim 8, characterized in that, When the filtrate in the high-level water tank is distributed to different links of the mineral processing production process according to production requirements based on the clean water self-circulation system, the method comprises the following steps: The clean water self-circulation system comprises a flow meter and a control system. The control system adjusts the opening degree of the adjusting valve according to the flow ratio, and monitors the flow of the two filtrates in real time according to the flow meter.

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