Beryllium ore beneficiation separation and enrichment method

Abstract

The invention discloses a beneficiation, separation and enrichment method for beryllium ore, and belongs to the technical field of mineral processing and purification. In order to solve the problems of low recovery rate, low concentrate grade, large reagent dosage and serious environmental pollution, the beneficiation efficiency and the purity of beryllium ore concentrate are remarkably improved through comprehensive utilization of various separation technologies such as crushing, ore grinding, reselection and flotation, and the quality of the beryllium ore concentrate is improved through graded screening and gravity separation pre-enrichment. The method has the advantages that flotation reagent consumption and tailing generation are reduced to the greatest extent, environmental pollution is reduced, beryllium mineral high-selectivity recovery is realized, stirring effect and product quality are improved by optimally controlling stability of the stirring process, production cost and energy consumption are reduced, production efficiency and safety are improved, and the method is suitable for industrial production. Through the technical effects of fine adjustment strategy, dynamic adaptability, stirring effect optimization and system stability enhancement, optimal control of the stirring speed adjustment gradient is realized, and the stability and consistency of the stirring process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral processing and purification, and in particular to a beryllium ore dressing, separation and enrichment method. Background Art

[0002] Beryllium is a rare metal that is widely used in aerospace, nuclear industry, electronic devices and high-end manufacturing due to its high melting point, low density, high strength and excellent thermal and optical properties. However, beryllium ore is usually associated with more gangue minerals, and the target minerals are finely embedded and have similar physical properties to gangue, which makes the separation and enrichment of beryllium ore face great technical problems.

[0003] Due to the similar physical properties of beryllium ore and its associated gangue, traditional mineral processing methods are difficult to achieve efficient separation. They have poor adaptability to the particle size of beryllium ore, which often leads to over-grinding or insufficient recovery of minerals, resulting in waste of resources. At the same time, the dosage of mineral processing agents often lacks scientific proportions, resulting in low flotation efficiency and serious environmental pollution. It is difficult to remove impurities in beryllium ore, resulting in low concentrate purity. Summary of the invention

[0004] The object of the present invention is to provide a method for beneficiation, separation and enrichment of beryllium ore to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a beryllium ore dressing, separation and enrichment method, characterized in that it comprises the following steps:

[0006] Ore crushing and pre-grading: the collected beryllium ore is sent to the jaw crusher for crushing, and the minerals are graded and crushed by the vibrating screen to separate the large-size ore particles and return them to the crushing process;

[0007] Mineral grinding and classification: the ore that meets the particle size requirements is sent to the ball mill for wet grinding. The ore pulp after grinding is classified by the hydrocyclone to obtain fine-grained ore pulp;

[0008] Gravity separation pre-enrichment: send the fine-grained slurry to gravity separation equipment for pre-enrichment, and concentrate the concentrate obtained by pre-enrichment;

[0009] Flotation separation: the re-selected concentrate is prepared into pulp, flotation reagents are added, and the pulp is stirred in a flotation tank. After the bubbles in the pulp are separated, the concentrate enriched in the foam layer is collected by a scraper;

[0010] Dehydration and drying of concentrate: the concentrate obtained by flotation is dehydrated through a thickener to obtain a high-concentration pulp, and the dehydrated high-concentration pulp is sent to a rotary dryer to obtain a dry concentrate;

[0011] Dry concentrate beneficiation: the dry concentrate is separated by a high gradient magnetic separator to remove weakly magnetic and strongly magnetic impurity minerals, and the dry concentrate is graded by particle size by a vibrating screen;

[0012] Products are graded and stored. The selected concentrates are collected for quality testing. Based on the test results and product requirements, the concentrates are graded, sealed and packaged according to grade, particle size and other specifications and stored.

[0013] Furthermore, the ore crushing and classification further comprises the following steps:

[0014] The collected beryllium ore is fed into the jaw crusher, and the discharge opening width is set to 8-10 mm;

[0015] The crushed ore is screened through a vibrating screen using an 8mm aperture screen to separate the ore particles with larger particle sizes. The ore particles larger than the aperture of the screen are returned to the crushing equipment for re-crushing until they meet the particle size requirements;

[0016] Ore particles with a particle size smaller than the screen mesh size enter the next step.

[0017] Furthermore, the mineral grinding and classification further comprises the following steps:

[0018] Feed the ore particles that meet the particle size requirements into the ball mill and control the slurry concentration to 60%-70%;

[0019] Start the ball mill for wet grinding, control the grinding time to 20-40 minutes, and make the ore particle size reach the range of 20-100 microns;

[0020] After grinding, the slurry is classified through a hydrocyclone, and the inlet pressure of the cyclone is controlled at 0.15-0.25MPa to obtain fine-grained slurry, and ultrafine mineral particles and gangue impurities with a particle size of less than 20 microns are separated, collected and processed, and the slurry that meets the particle size requirements is sent to the next step.

[0021] Furthermore, the reselection pre-enrichment specifically further comprises the following steps:

[0022] The classified fine-grained slurry is pumped into the spiral chute through a slurry pump. The chute inclination is adjusted to 9°-12°, and the slurry flow rate is controlled to 0.8-1.5m / s. Gravity separation and pre-enrichment are performed based on the difference in mineral density.

[0023] During pre-enrichment, beryllium ore is concentrated in the concentrate zone, and gangue minerals are discharged into the tailings zone;

[0024] The concentrate slurry is collected, the concentrate obtained by pre-enrichment is concentrated, and the slurry is concentrated to a solid mass fraction of 40%-50% by a thickener.

[0025] Furthermore, the flotation separation further comprises the following steps:

[0026] The gravity separation concentrate is prepared into a pulp with a solid mass fraction of 25%-30%, a flotation agent is added and the pH value of the pulp is adjusted to 7-8;

[0027] The slurry is sent to the flotation tank, the stirring speed is controlled at 800-1200rpm, and bubbles are introduced for bubble separation;

[0028] The flotation concentrate enriched in the foam layer is collected by scrapers, and the waste minerals are discharged into the tailings pond.

[0029] Furthermore, the flotation separation further comprises the following steps:

[0030] Real-time monitoring of stirring speed;

[0031] comparing the stirring speed with a preset stirring speed reference value;

[0032] Obtaining a stirring speed operation stability coefficient by using a comparison result between the stirring speed and a preset stirring speed reference value;

[0033] The stirring speed operation stability coefficient is obtained by the following formula:

[0034]

[0035] Where W represents the stirring speed operation stability coefficient; n represents the number of stirring speed adjustment times; R hi represents the stirring speed after the i-th stirring speed adjustment; R xi represents the stirring speed before the i-th stirring speed adjustment; R c Indicates the preset stirring speed reference value; R bi represents the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R fmax represents the maximum adjustment gradient corresponding to n times of stirring speed adjustment; R tci represents the upper limit value of the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment;

[0036] Comparing the stirring speed operation stability coefficient with a preset stability coefficient threshold;

[0037] When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, the upper limit value of the stirring speed adjustment gradient is increased.

[0038] Furthermore, when the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, the upper limit value of the stirring speed adjustment gradient is increased, including:

[0039] When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, extracting the adjustment gradient value corresponding to each stirring speed adjustment;

[0040] Obtaining the adjustment gradient coefficient using the adjustment gradient value corresponding to each stirring speed adjustment;

[0041] The adjustment gradient coefficient is obtained by the following formula:

[0042]

[0043] Where K represents the adjustment gradient coefficient; n represents the number of stirring speed adjustments; R bi represents the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R bi+1 represents the stirring speed adjustment gradient corresponding to the i+1th stirring speed adjustment; R tci represents the upper limit value of the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R tci+1 represents the upper limit of the stirring speed adjustment gradient corresponding to the i+1th stirring speed adjustment; P represents the accuracy rate corresponding to the nth stirring speed adjustment; R B It represents the standard deviation of the adjustment amount corresponding to n times of stirring speed adjustment;

[0044] The upper limit value of the adjusted stirring speed adjustment gradient is obtained by using the adjustment gradient coefficient in combination with the stirring speed operation stability coefficient;

[0045] The upper limit of the adjusted stirring speed adjustment gradient is obtained by the following formula:

[0046]

[0047] Among them, R tc Represents the upper limit of the adjusted stirring speed adjustment gradient; R tc0 It indicates the upper limit of the stirring speed adjustment gradient before adjustment; K indicates the adjustment gradient coefficient.

[0048] Furthermore, the flotation reagent includes a regulator, a collector and a frother;

[0049] Among them, the adjusting agent is one of sodium carbonate and sodium hydroxide, and the added amount of the adjusting agent is 0.2%-0.5% of the mass of the slurry; the collecting agent is one of fatty acid and modified fatty acid collecting agents, and the added amount of the collecting agent is 0.1%-0.3% of the mass of the slurry; the foaming agent is one of pine oil and plant foaming agents, and the added amount of the foaming agent is 0.05%-0.1% of the mass of the slurry.

[0050] Furthermore, the concentrate dehydration and drying specifically further comprises the following steps:

[0051] The concentrate obtained by flotation is sent to the thickener, and the thickening time is controlled to be 4-6 hours, so that the pulp is concentrated to a solid mass fraction of 60%-70%;

[0052] The concentrated pulp is further dehydrated through a vacuum filter to reduce the solid moisture content of the pulp to 10%-15%;

[0053] The dehydrated concentrate is sent to a rotary dryer, and the drying temperature is controlled to be 120-150°C, and the drying time is 30-60 minutes, so that the moisture content of the concentrate is reduced to less than 2% to obtain a dry concentrate.

[0054] Furthermore, the dry concentrate beneficiation further comprises the following steps:

[0055] The dried concentrate is fed into a high gradient magnetic separator, the magnetic induction intensity range is controlled to be 0.8-1.5T, the magnetic field intensity is adjusted to separate weakly magnetic minerals and non-magnetic beryllium minerals, and the feed rate is controlled to be 2-5 tons / hour;

[0056] The concentrate purified by magnetic separation is sent to the vibrating screen to classify the mineral particles;

[0057] The aperture of the vibrating screen is set to 0.1mm, 0.5mm and 1mm to separate coarse and fine concentrates according to different particle size requirements. The amplitude range is controlled to 2-5mm and the vibration frequency is controlled to 800-1200 times / minute;

[0058] The selected concentrates classified by particle size are collected through different discharge ports and sent to the product grading and storage stages respectively.

[0059] Furthermore, the product classification storage specifically includes the following steps:

[0060] The concentrated ore is sent to the quality inspection stage, and random samples are taken from the concentrated ore to test the beryllium content, impurity content, particle size distribution and physical stability;

[0061] According to the test results, the concentrated ore is divided into different grades, and the grade and corresponding batch number are calibrated for each batch of concentrated ore;

[0062] The graded concentrate is sealed and packaged, and the batch number, grade, weight, production date and usage precautions are marked on the package;

[0063] The packaged selected concentrate is stored in a special warehouse according to the grading results and stored in different areas according to the concentrate grade.

[0064] Compared with the prior art, the present invention has the following beneficial effects:

[0065] 1. The present invention monitors the stirring speed in real time, and the system can instantly obtain the speed information during the stirring process. By comparing the stirring speed monitored in real time with the preset stirring speed reference value, it can be determined whether the current stirring speed deviates from the expected value, and the stirring speed operation stability coefficient can be accurately calculated. Using the stirring speed operation stability coefficient, the system can intelligently determine the stability of the stirring speed. When the stability coefficient is lower than the preset stability coefficient threshold, the system can automatically increase the upper limit value of the stirring speed adjustment gradient, thereby adjusting the stirring speed adjustment strategy to improve the stability of the stirring process, thereby improving the stirring effect and product quality, improving the mixing uniformity and reaction efficiency, and avoiding production interruptions or equipment damage caused by unstable stirring speed. By means of real-time monitoring of the stirring speed, precise control and intelligent adjustment, the stability of the stirring process is optimized and controlled, the stirring effect and product quality are improved, while reducing production costs and energy consumption, and improving production efficiency and safety.

[0066] 2. By extracting the adjustment gradient value corresponding to each stirring speed adjustment, the present invention enables the system to analyze the adjustment process of the stirring speed in more detail, comprehensively consider the accuracy and gradient changes of multiple stirring speed adjustments, and thus formulate a more reasonable adjustment strategy. According to the real-time change of the stirring speed operation stability coefficient, the upper limit value of the stirring speed adjustment gradient is dynamically adjusted, which helps the system to maintain the stability and consistency of the stirring speed when facing different stirring conditions and material characteristics, thereby avoiding excessive or insufficient adjustment, reducing energy consumption and material loss during the stirring process, improving production efficiency, and ensuring that the stirring process is carried out within a more stable speed range, thereby improving the stirring effect and product quality. Through refined adjustment and dynamic adaptability, the system can better cope with various abnormal situations in the stirring process and enhance the stability and reliability of the system. Through simple parameter setting and debugging, the system can realize dynamic adjustment of the stirring speed adjustment gradient, reducing the complexity of maintenance and operation.

[0067] 3. The present invention overcomes the difficulties of high impurity content in beryllium ore and fine particle size of target minerals by comprehensively utilizing multiple separation technologies such as crushing, grinding, gravity separation and flotation, combined with precise process parameter optimization, and significantly improves the beneficiation efficiency and the purity of beryllium ore concentrate. Through graded screening and gravity separation pre-enrichment, the consumption of flotation agents and the generation of tailings are minimized, environmental pollution is reduced, and highly selective recovery of beryllium minerals is achieved by precisely adjusting the type and amount of flotation agents. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 It is a schematic diagram of the process of the beryllium ore dressing, separation and enrichment method of the present invention. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] See also Figure 1 , the present invention provides the following technical solutions:

[0071] A beryllium ore dressing, separation and enrichment method comprises the following steps:

[0072] Ore crushing and pre-grading: the collected beryllium ore is sent to the jaw crusher for crushing, and the minerals are graded and crushed by the vibrating screen to separate the large-size ore particles and return them to the crushing process;

[0073] Mineral grinding and classification: the ore that meets the particle size requirements is sent to the ball mill for wet grinding. The ore pulp after grinding is classified by the hydrocyclone to obtain fine-grained ore pulp;

[0074] Gravity separation pre-enrichment: send the fine-grained slurry to gravity separation equipment for pre-enrichment, and concentrate the concentrate obtained by pre-enrichment;

[0075] Flotation separation: the re-selected concentrate is prepared into pulp, flotation reagents are added, and the pulp is stirred in a flotation tank. After the bubbles in the pulp are separated, the concentrate enriched in the foam layer is collected by a scraper;

[0076] Dehydration and drying of concentrate: the concentrate obtained by flotation is dehydrated through a thickener to obtain a high-concentration pulp, and the dehydrated high-concentration pulp is sent to a rotary dryer to obtain a dry concentrate;

[0077] Dry concentrate beneficiation: the dry concentrate is separated by a high gradient magnetic separator to remove weakly magnetic and strongly magnetic impurity minerals, and the dry concentrate is graded by particle size by a vibrating screen;

[0078] Products are graded and stored. The selected concentrates are collected for quality testing. Based on the test results and product requirements, the concentrates are graded, sealed and packaged according to grade, particle size and other specifications and stored.

[0079] In the above embodiments, by comprehensively utilizing a variety of separation technologies such as crushing, grinding, gravity separation and flotation, combined with precise optimization of process parameters, the difficulties of high impurity content in beryllium ore and fine particle size of target minerals are overcome, and the beneficiation efficiency and purity of beryllium ore concentrate are significantly improved. Through graded screening and gravity separation pre-enrichment, the consumption of flotation agents and the generation of tailings are minimized, environmental pollution is reduced, and by precisely adjusting the type and amount of flotation agents, highly selective recovery of beryllium minerals is achieved.

[0080] Ore crushing and classification also includes the following steps:

[0081] The collected beryllium ore is fed into the jaw crusher, and the discharge opening width is set to 8-10 mm;

[0082] The crushed ore is screened through a vibrating screen using an 8mm aperture screen to separate the ore particles with larger particle sizes. The ore particles larger than the aperture of the screen are returned to the crushing equipment for re-crushing until they meet the particle size requirements;

[0083] Ore particles with a particle size smaller than the screen mesh size enter the next step.

[0084] In the above embodiment, after screening by the vibrating screen, the ore particles with larger particle size are returned to the crushing process, avoiding the repeated crushing of small particle ore, thereby improving the crushing efficiency and saving energy. The ore particle size after screening is uniform, which is conducive to the efficient operation of the subsequent ball milling process, reducing the problems of over-grinding and uneven slurry concentration. Through cyclic crushing and classification, the loss and waste of minerals are reduced, and the beryllium ore resources are more fully utilized. The screening link is embedded in the crushing process to form a closed loop.

[0085] Mineral grinding and classification also includes the following steps:

[0086] Feed the ore particles that meet the particle size requirements into the ball mill and control the slurry concentration to 60%-70%;

[0087] Start the ball mill for wet grinding, control the grinding time to 20-40 minutes, and make the ore particle size reach the range of 20-100 microns;

[0088] After grinding, the slurry is classified through a hydrocyclone, and the inlet pressure of the cyclone is controlled at 0.15-0.25MPa to obtain fine-grained slurry, and ultrafine mineral particles and gangue impurities with a particle size of less than 20 microns are separated, collected and processed, and the slurry that meets the particle size requirements is sent to the next step.

[0089] In the above embodiment, the slurry concentration is controlled at 60%-70% by wet grinding, achieving the particle size requirement of 20-100 microns. The appropriate particle size range is conducive to the subsequent separation process, improves the recovery rate of beryllium ore, adopts hydrocyclone classification, and uses the particle size difference to eliminate ultrafine particles and gangue impurities, improves the grade of slurry and reduces the interference of gangue minerals in subsequent flotation, accurately controls the grinding time and cyclone pressure, avoids over-grinding, saves energy consumption, and reduces the wear of grinding equipment. The combination of wet grinding and classification solves the problem of fine and complex distribution of beryllium ore, and significantly improves the slurry quality and sorting efficiency.

[0090] The reselection pre-enrichment specifically further comprises the following steps:

[0091] The classified fine-grained slurry is pumped into the spiral chute through a slurry pump. The chute inclination is adjusted to 9°-12°, and the slurry flow rate is controlled to 0.8-1.5m / s. Gravity separation and pre-enrichment are performed based on the difference in mineral density.

[0092] During pre-enrichment, beryllium ore is concentrated in the concentrate zone, and gangue minerals are discharged into the tailings zone;

[0093] The concentrate slurry is collected, the concentrate obtained by pre-enrichment is concentrated, and the slurry is concentrated to a solid mass fraction of 40%-50% by a thickener.

[0094] In the above embodiment, the density difference between beryllium ore and gangue is used to achieve preliminary separation, and the beryllium minerals are enriched in the concentrate zone, which reduces the processing volume and reagent consumption of subsequent flotation. In the re-selection process, only the slurry flow rate and density difference are used, and no chemical reagents need to be added, thereby avoiding chemical pollution, reflecting the advantages of green technology. The concentrate is processed through a thickener to a solid mass fraction of 40%-50%, providing suitable slurry conditions for subsequent flotation process, optimizing the inclination angle and flow rate of the spiral chute, and maximizing the use of density difference for separation, thereby providing a highly efficient and environmentally friendly pretreatment technology for beryllium ore dressing.

[0095] Flotation separation specifically includes the following steps:

[0096] The gravity separation concentrate is prepared into a pulp with a solid mass fraction of 25%-30%, and a flotation agent is added to adjust the pH value of the pulp to 7-8. The flotation agent includes a regulator, a collector and a frother;

[0097] The adjusting agent is one of sodium carbonate and sodium hydroxide, and the adding amount of the adjusting agent is 0.2%-0.5% of the mass of the ore pulp; the collecting agent is one of fatty acid and modified fatty acid collecting agents, and the adding amount of the collecting agent is 0.1%-0.3% of the mass of the ore pulp; the foaming agent is one of pine alcohol and plant foaming agents, and the adding amount of the foaming agent is 0.05%-0.1% of the mass of the ore pulp;

[0098] The slurry is sent to the flotation tank, the stirring speed is controlled at 800-1200rpm, and bubbles are introduced for bubble separation;

[0099] The flotation concentrate enriched in the foam layer is collected by scrapers, and the waste minerals are discharged into the tailings pond.

[0100] In the above embodiments, by adjusting the pH value of the pulp with sodium carbonate and scientifically matching the fatty acid collector and the pinene alcohol foaming agent, the flotation process has high selectivity for beryllium ore, the recovery rate is significantly improved, and the dosage of the reagent is controlled within a reasonable range, which not only reduces the cost but also reduces the impact of the reagent residue on the environment. The bubbles are used to bring the beryllium mineral into the foam layer, which improves the enrichment efficiency of the concentrate and provides high-quality raw materials for the final dehydration and drying. The refined design of the flotation reagent and process parameters, combined with the optimized operating conditions of the flotation equipment (such as stirring speed and bubble separation), effectively solves the separation problem of beryllium ore and gangue with similar physical properties.

[0101] Specifically, the flotation separation further comprises the following steps:

[0102] Real-time monitoring of stirring speed;

[0103] comparing the stirring speed with a preset stirring speed reference value;

[0104] Obtaining a stirring speed operation stability coefficient by using a comparison result between the stirring speed and a preset stirring speed reference value;

[0105] The stirring speed operation stability coefficient is obtained by the following formula:

[0106]

[0107] Where W represents the stirring speed operation stability coefficient; n represents the number of stirring speed adjustment times; R hi represents the stirring speed after the i-th stirring speed adjustment; R xi represents the stirring speed before the i-th stirring speed adjustment; R c Indicates the preset stirring speed reference value; R bi represents the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R fmax represents the maximum adjustment gradient corresponding to n times of stirring speed adjustment; R tci represents the upper limit value of the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment;

[0108] Comparing the stirring speed operation stability coefficient with a preset stability coefficient threshold;

[0109] When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, the upper limit value of the stirring speed adjustment gradient is increased.

[0110] The technical effect of the above technical solution is: by real-time monitoring of the stirring speed, the system can instantly obtain the speed information during the stirring process, and provide basic data for subsequent comparison and adjustment. Real-time monitoring ensures the dynamic control of the stirring process, which helps to timely discover the abnormal speed and take corresponding adjustment measures. By comparing the stirring speed monitored in real time with the preset stirring speed reference value, it can be judged whether the current stirring speed deviates from the expected value. Through the comparison results, the system can accurately calculate the stirring speed operation stability coefficient, which reflects the stability and consistency of the stirring speed during the adjustment process. Using the stirring speed operation stability coefficient, the system can intelligently judge the stability of the stirring speed. When the stability coefficient is lower than the preset stability coefficient threshold, the system can automatically increase the upper limit of the stirring speed adjustment gradient, thereby adjusting the stirring speed adjustment strategy to improve the stability of the stirring process. Through precise control and intelligent adjustment, the system can ensure that the stirring speed fluctuates within a stable range, thereby improving the stirring effect and product quality. A stable stirring speed helps to reduce the unevenness and agglomeration of materials during the stirring process, and improve the mixing uniformity and reaction efficiency. Real-time monitoring and intelligent adjustment can promptly detect and correct abnormal phenomena in the mixing process, avoiding production interruptions or equipment damage caused by unstable mixing speed. By optimizing the mixing process, the system can reduce energy consumption and production costs, and improve production efficiency and safety. This technical solution is based on the principles of real-time monitoring and intelligent control, and is easy to implement and integrate on existing mixing equipment. Through simple parameter setting and debugging, the system can achieve stable control of the mixing speed, reducing the complexity of maintenance and operation.

[0111] In summary, this technical solution achieves optimized control of the stability of the stirring process through real-time monitoring of the stirring speed, precise control and intelligent adjustment, improves the stirring effect and product quality, while reducing production costs and energy consumption, and improving production efficiency and safety.

[0112] Specifically, when the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, the upper limit value of the stirring speed adjustment gradient is increased, including:

[0113] When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, extracting the adjustment gradient value corresponding to each stirring speed adjustment;

[0114] Obtaining the adjustment gradient coefficient using the adjustment gradient value corresponding to each stirring speed adjustment;

[0115] The adjustment gradient coefficient is obtained by the following formula:

[0116]

[0117] Where K represents the adjustment gradient coefficient; n represents the number of stirring speed adjustments; R bi represents the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R bi+1 represents the stirring speed adjustment gradient corresponding to the i+1th stirring speed adjustment; R tci represents the upper limit value of the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R tci+1 represents the upper limit of the stirring speed adjustment gradient corresponding to the i+1th stirring speed adjustment; P represents the accuracy rate corresponding to the nth stirring speed adjustment; R B It represents the standard deviation of the adjustment amount corresponding to n times of stirring speed adjustment;

[0118] The upper limit value of the adjusted stirring speed adjustment gradient is obtained by using the adjustment gradient coefficient in combination with the stirring speed operation stability coefficient;

[0119] The upper limit of the adjusted stirring speed adjustment gradient is obtained by the following formula:

[0120]

[0121] Among them, R tc Represents the upper limit of the adjusted stirring speed adjustment gradient; R tc0 It indicates the upper limit of the stirring speed adjustment gradient before adjustment; K indicates the adjustment gradient coefficient.

[0122] The technical effect of the above technical solution is: by extracting the adjustment gradient value corresponding to each stirring speed adjustment, the system can analyze the adjustment process of the stirring speed more carefully, and provide an accurate data basis for the subsequent calculation of the adjustment gradient coefficient. Using the adjustment gradient coefficient, the system can comprehensively consider the accuracy and gradient changes of multiple stirring speed adjustments, so as to formulate a more reasonable adjustment strategy. The technical solution can dynamically adjust the upper limit value of the stirring speed adjustment gradient according to the real-time change of the stirring speed operation stability coefficient. This dynamic adaptability helps the system to maintain the stability and consistency of the stirring speed when facing different stirring conditions and material characteristics. By introducing the adjustment gradient coefficient, the system can more accurately evaluate the effect of stirring speed adjustment, thereby avoiding excessive or insufficient adjustment. Accurate adjustment helps to reduce energy consumption and material loss during the stirring process and improve production efficiency. The adjusted upper limit value of the stirring speed adjustment gradient can ensure that the stirring process is carried out within a more stable speed range, thereby improving the stirring effect and product quality. Stable stirring speed helps to improve the mixing uniformity and reaction efficiency of materials, and improve the quality and consistency of products. Through refined adjustment and dynamic adaptability, the system can better cope with various abnormal situations during the stirring process and enhance the stability and reliability of the system. A stable system helps reduce production interruptions and equipment failures, and improves production efficiency and safety. Through simple parameter settings and debugging, the system can dynamically adjust the stirring speed adjustment gradient, reducing the complexity of maintenance and operation.

[0123] In summary, this technical solution achieves optimal control of the stirring speed adjustment gradient through the technical effects of refined adjustment strategy, dynamic adaptability, improved adjustment accuracy, optimized stirring effect, enhanced system stability and easy implementation and maintenance, thereby improving the stability and consistency of the stirring process, thereby improving production efficiency and product quality.

[0124] The concentrate dehydration and drying process specifically includes the following steps:

[0125] The concentrate obtained by flotation is sent to the thickener, and the thickening time is controlled to be 4-6 hours, so that the pulp is concentrated to a solid mass fraction of 60%-70%;

[0126] The concentrated pulp is further dehydrated through a vacuum filter to reduce the solid moisture content of the pulp to 10%-15%;

[0127] The dehydrated concentrate is sent to a rotary dryer, and the drying temperature is controlled to be 120-150°C, and the drying time is 30-60 minutes, so that the moisture content of the concentrate is reduced to less than 2% to obtain a dry concentrate.

[0128] In the above embodiment, the optimized design of thickening time and vacuum filtration increases the pulp concentration to 60%-70%, significantly reducing the drying energy consumption. The temperature and time are controlled by the rotary dryer to avoid property changes or losses of the minerals due to overheating. The dry concentrate has a low moisture content, which prevents agglomeration or oxidation caused by moisture during transportation. The combination of the drying process and the dehydration process reduces energy consumption while ensuring efficiency, achieving a win-win situation of production economy and environmental friendliness.

[0129] Dry concentrate concentration also includes the following steps:

[0130] The dried concentrate is fed into a high gradient magnetic separator, the magnetic induction intensity range is controlled to be 0.8-1.5T, the magnetic field intensity is adjusted to separate weakly magnetic minerals and non-magnetic beryllium minerals, and the feed rate is controlled to be 2-5 tons / hour;

[0131] The concentrate purified by magnetic separation is sent to the vibrating screen to classify the mineral particles;

[0132] The aperture of the vibrating screen is set to 0.1mm, 0.5mm and 1mm to separate coarse and fine concentrates according to different particle size requirements. The amplitude range is controlled to 2-5mm and the vibration frequency is controlled to 800-1200 times / minute;

[0133] The selected concentrates classified by particle size are collected through different discharge ports and sent to the product grading and storage stages respectively.

[0134] In the above embodiment, the high gradient magnetic separator is used to effectively remove weakly magnetic and strongly magnetic impurity minerals, reduce the impurity content, and increase the purity of the concentrate, thereby improving the grade of the beryllium ore. The magnetic induction intensity range is controlled to adapt to the separation requirements of the magnetic properties of different minerals, ensuring the thorough separation of weakly magnetic impurities. The coarse and fine concentrates after classification by the vibrating screen can meet the needs of different downstream uses, thereby improving resource utilization. The dry concentrate is further refined through the two steps of magnetic separation and screening, reducing the residual impurities after gravity separation and flotation, improving the efficiency and stability of the entire mineral processing process, effectively reducing the presence of impurities, avoiding the complexity and cost of impurity treatment in subsequent smelting links, and increasing the added value of mineral processing products.

[0135] The product classification and storage also includes the following steps:

[0136] The concentrated ore is sent to the quality inspection stage, and random samples are taken from the concentrated ore to test the beryllium content, impurity content, particle size distribution and physical stability;

[0137] According to the test results, the concentrated ore is divided into different grades, and the grade and corresponding batch number are calibrated for each batch of concentrated ore;

[0138] The graded concentrate is sealed and packaged, and the batch number, grade, weight, production date and usage precautions are marked on the package;

[0139] The packaged selected concentrate is stored in a special warehouse according to the grading results and stored in different areas according to the concentrate grade.

[0140] In the above embodiment, through the quality inspection link, random sampling is performed to detect the beryllium content, impurity content, particle size distribution and physical stability, ensuring that each batch of selected concentrate meets the standards, improving the reliability of the product, calibrating the grade and batch number for each batch, realizing product traceability management, facilitating quality control and market circulation, and the sealed packaging protects the quality of the selected concentrate. The graded storage of the products can provide products of different specifications according to market demand, thereby improving the competitiveness of beryllium ore products and user satisfaction.

[0141] The technical solution of the present invention is further described through the following control groups and application examples:

[0142] Control group 1:

[0143] According to the steps and methods in the manual, beryllium ore is separated and enriched, the adjusting agent is sodium carbonate, the addition amount is 0.4%; the collecting agent is fatty acid, the addition amount is 0.2%; the foaming agent is pine alcohol, the addition amount is 0.08%; the magnetic induction intensity of the magnetic separation equipment is fixed at 1.0T, and the feed rate is controlled at 3 tons / hour; the aperture of the vibrating screen is only 0.5mm, the amplitude is fixed at 3mm, and the vibration frequency is 1000 times / minute;

[0144] Set the stirring speed reference value to 1000 rpm, the initial adjustment number to 3 times, the adjustment gradient to 10 rpm, the upper limit gradient to 20 rpm, and the maximum adjustment gradient to 30 rpm.

[0145] Application Example 1:

[0146] On the basis of the control group scheme, the adjusting agent was adjusted to sodium carbonate, and the addition amount was 0.3%; the collecting agent was modified fatty acids, and the addition amount was 0.25%; the foaming agent was a plant foaming agent, and the addition amount was 0.06%.

[0147] Application Example 2:

[0148] On the basis of the control group scheme, the magnetic induction intensity was increased to 1.5T, and the feed rate was reduced to 2.5 tons / hour to increase the separation time of mineral particles. The vibration screen parameters were kept the same as the control group settings and the number of adjustments was the same as the control group.

[0149] Application Example 3:

[0150] Based on the control group scheme, the magnetic induction intensity was set to 1.2T and the feed rate was controlled to 2.8 tons / hour.

[0151] Control group 2:

[0152] Combine the optimized parameters of Application Examples 1, 2, and 3.

[0153] Application example 4:

[0154] Based on the scheme of control group 2, the initial adjustment times were increased to 5 times, and the adjustment gradient was optimized to 15 rpm.

[0155] Application Example 5:

[0156] Based on the solution of Application Example 4, the gradient was adjusted to 20 rpm.

[0157] Application Example 6:

[0158] Based on the solution of Application Example 5, the upper limit gradient is set to 25 rpm.

[0159] The beryllium ore was separated and enriched according to the different conditions of the control group 1-2 and the application example 1-6. After the separation and enrichment, the finished products in the control group 1-2 and the application example 1-6 were sampled and tested, and the separation and enrichment effect and the equipment stirring stability coefficient were determined. The specific test and determination results are shown in Table 1:

[0160] Experimental Group Beryllium content (%) Impurity content (%) Flotation efficiency (%) Stirring stability coefficient (W) Control group 1 75.3 4.5 82.5 0.0022 Application Example 1 78.6 3.8 84.3 0.0022 Application Example 2 76.5 3.2 85.7 0.0022 Application Example 3 77.4 3.5 84.9 0.0022 Control group 2 80.2 3.0 88.2 0.0022 Application Example 4 81.1 2.8 89.0 0.0060 Application Example 5 82.0 2.5 90.3 0.0075 Application Example 6 83.5 2.3 91.5 0.0080

[0161] As can be seen from Table 1, in terms of beryllium content, the beryllium content of control group 1 is 75.3%, and the beryllium ore enrichment efficiency of the traditional process is low. After optimizing the single parameters (agent, magnetic separation intensity or feed rate) in application examples 1-3, the beryllium content increased to 78.6%, 76.5% and 77.4% respectively, indicating that the optimization of a single parameter can improve the beryllium ore enrichment effect to varying degrees, among which the effect of flotation agent optimization is the most significant. After combining the optimized parameters of control group 2 with application examples 1-3, the beryllium content increased to 80.2%, and the multi-parameter collaborative optimization significantly improved the enrichment effect. Application examples 4-6: By further optimizing the stirring parameters (adjustment times and gradient), the beryllium content gradually increased from 81.1% to 83.5%, and comprehensive optimization achieved the best effect of beryllium ore enrichment.

[0162] In terms of impurity content, the impurity content of control group 1 was 4.5%, the highest value among all experimental groups, and the traditional process had a poor effect on impurity removal. The impurity content of application examples 1-3 gradually decreased, and the magnetic separation optimization effect of application example 2 was significant, with the impurity content reduced to 3.2%. After multi-parameter coordinated optimization of control group 2, the impurity content dropped to 3.0%, which was better than the single parameter optimization group. After further optimizing the stirring parameters in application examples 4-6, the impurity content gradually decreased from 2.8% to 2.3%, and the impurity removal effect was optimal.

[0163] In terms of flotation efficiency, the flotation efficiency of control group 1 was 82.5%, and the flotation recovery rate of the traditional process was low. The flotation efficiency of application examples 1-3 was increased to 84.3%, 85.7% and 84.9% respectively, and the optimization of reagents and magnetic separation intensity had a significant effect on improving flotation efficiency. After multi-parameter coordinated optimization of control group 2, the flotation efficiency was increased to 88.2%, indicating that comprehensive optimization has significantly improved the recovery rate of beryllium ore. By further optimizing the stirring parameters, the flotation efficiency of application examples 4-6 was gradually increased from 89.0% to 91.5%, and the flotation recovery rate reached the optimal level.

[0164] In terms of stirring stability coefficient, control group 1-2 and application example 1-3 are traditional processes, and the stirring stability of the single parameter optimization group is poor, which may affect the flotation effect. Application example 4-6 gradually improves the stirring stability coefficient from 0.0060 to 0.0080 by optimizing the adjustment times and gradient, which significantly improves the stability of the stirring process and ensures the stability of flotation efficiency and enrichment effect.

[0165] In summary, by comprehensively utilizing multiple separation technologies such as crushing, grinding, gravity separation and flotation, combined with precise optimization of process parameters, we have overcome the difficulties of high impurity content in beryllium ore and fine particle size of target minerals, significantly improved the beneficiation efficiency and purity of beryllium ore concentrate, and minimized the consumption of flotation agents and the generation of tailings through graded screening and gravity separation pre-enrichment, thereby reducing environmental pollution. By precisely adjusting the type and dosage of flotation agents, we have achieved highly selective recovery of beryllium minerals.

[0166] By means of real-time monitoring of stirring speed, precise control and intelligent adjustment, the stability of the stirring process is optimized, the stirring effect and product quality are improved, while the production cost and energy consumption are reduced, and the production efficiency and safety are improved. Through the technical effects of refined adjustment strategies, dynamic adaptability, improved adjustment accuracy, optimized stirring effect, enhanced system stability and easy implementation and maintenance, the stirring speed adjustment gradient is optimized and controlled, the stability and consistency of the stirring process are improved, thereby improving production efficiency and product quality.

[0167] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for beneficiation, separation and enrichment of beryllium ore, characterized in that: The following steps are involved: Ore crushing and pre-grading: the collected beryllium ore is sent to the jaw crusher for crushing, and the minerals are graded and crushed by the vibrating screen to separate the large-size ore particles and return them to the crushing process; Mineral grinding and classification: the ore that meets the particle size requirements is sent to the ball mill for wet grinding. The ore pulp after grinding is classified by the hydrocyclone to obtain fine-grained ore pulp; Gravity separation pre-enrichment: send the fine-grained slurry to gravity separation equipment for pre-enrichment, and concentrate the concentrate obtained by pre-enrichment; Flotation separation: the re-selected concentrate is prepared into pulp, flotation reagents are added, and the pulp is stirred in a flotation tank. After the bubbles in the pulp are separated, the concentrate enriched in the foam layer is collected by a scraper; Dehydration and drying of concentrate: the concentrate obtained by flotation is dehydrated through a thickener to obtain a high-concentration pulp, and the dehydrated high-concentration pulp is sent to a rotary dryer to obtain a dry concentrate; Dry concentrate beneficiation: the dry concentrate is separated by a high gradient magnetic separator to remove weakly magnetic and strongly magnetic impurity minerals, and the dry concentrate is graded by particle size by a vibrating screen; Products are graded and stored, and the selected concentrates are collected for quality testing. Based on the test results and product requirements, the concentrates are graded, sealed and packaged according to grade, particle size and other specifications, and stored.

2. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The ore crushing and classification further comprises the following steps: The collected beryllium ore is fed into the jaw crusher, and the discharge opening width is set to 8-10 mm; The crushed ore is screened through a vibrating screen using an 8mm aperture screen to separate the ore particles with larger particle sizes. The ore particles larger than the aperture of the screen are returned to the crushing equipment for re-crushing until they meet the particle size requirements; Ore particles with a particle size smaller than the screen mesh size enter the next step.

3. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The mineral grinding and classification specifically further comprises the following steps: Feed the ore particles that meet the particle size requirements into the ball mill and control the slurry concentration to 60%-70%; Start the ball mill for wet grinding, control the grinding time to 20-40 minutes, and make the ore particle size reach the range of 20-100 microns; After grinding, the slurry is classified through a hydrocyclone, and the inlet pressure of the cyclone is controlled at 0.15-0.25MPa to obtain fine-grained slurry, and ultrafine mineral particles and gangue impurities with a particle size of less than 20 microns are separated, collected and processed, and the slurry that meets the particle size requirements is sent to the next step.

4. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The reselection pre-enrichment specifically further comprises the following steps: The classified fine-grained slurry is pumped into the spiral chute through a slurry pump. The chute inclination is adjusted to 9°-12°, and the slurry flow rate is controlled to 0.8-1.5m / s. Gravity separation and pre-enrichment are performed based on the difference in mineral density. During pre-enrichment, beryllium ore is concentrated in the concentrate zone, and gangue minerals are discharged into the tailings zone; The concentrate slurry is collected, the concentrate obtained by pre-enrichment is concentrated, and the slurry is concentrated to a solid mass fraction of 40%-50% by a thickener.

5. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The flotation separation further comprises the following steps: The re-selected concentrate is prepared into a pulp with a solid mass fraction of 25% to 30%, and a flotation agent is added to adjust the pH value of the pulp to 7 to 8. The flotation agent includes a regulator, a collector and a frother; The adjusting agent is one of sodium carbonate and sodium hydroxide, and the adding amount of the adjusting agent is 0.2%-0.5% of the mass of the ore pulp; the collecting agent is one of fatty acid and modified fatty acid collecting agents, and the adding amount of the collecting agent is 0.1%-0.3% of the mass of the ore pulp; the foaming agent is one of pine alcohol and plant foaming agent, and the adding amount of the foaming agent is 0.05%-0.1% of the mass of the ore pulp; The slurry is sent to the flotation tank, the stirring speed is controlled at 800-1200rpm, the flotation concentrate enriched in the foam layer is collected by the scraper, and the waste minerals are discharged into the tailings pond.

6. The beryllium ore separation and enrichment method according to claim 5, characterized in that: The flotation separation further comprises the following steps: Real-time monitoring of stirring speed; comparing the stirring speed with a preset stirring speed reference value; Obtaining a stirring speed operation stability coefficient by using a comparison result between the stirring speed and a preset stirring speed reference value; The stirring speed operation stability coefficient is obtained by the following formula: Where W represents the stirring speed operation stability coefficient; n represents the number of stirring speed adjustment times; R hi represents the stirring speed after the i-th stirring speed adjustment; R xi represents the stirring speed before the i-th stirring speed adjustment; R c Indicates the preset stirring speed reference value; R bi represents the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R fmax represents the maximum adjustment gradient corresponding to n times of stirring speed adjustment; R tci represents the upper limit value of the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; Comparing the stirring speed operation stability coefficient with a preset stability coefficient threshold; When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, the upper limit value of the stirring speed adjustment gradient is increased.

7. A beryllium ore dressing, separation and enrichment method as claimed in claim 6, characterized in that: When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, the upper limit value of the stirring speed adjustment gradient is increased, including: When the stirring speed operation stability coefficient is lower than a preset stability coefficient threshold, extracting the adjustment gradient value corresponding to each stirring speed adjustment; Obtaining the adjustment gradient coefficient using the adjustment gradient value corresponding to each stirring speed adjustment; The adjustment gradient coefficient is obtained by the following formula: Where K represents the adjustment gradient coefficient; n represents the number of stirring speed adjustments; R bi represents the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R bi+1 represents the stirring speed adjustment gradient corresponding to the i+1th stirring speed adjustment; R tci represents the upper limit value of the stirring speed adjustment gradient corresponding to the i-th stirring speed adjustment; R tci+1 represents the upper limit of the stirring speed adjustment gradient corresponding to the i+1th stirring speed adjustment; P represents the accuracy rate corresponding to the nth stirring speed adjustment; R B It represents the standard deviation of the adjustment amount corresponding to n times of stirring speed adjustment; The upper limit value of the adjusted stirring speed adjustment gradient is obtained by using the adjustment gradient coefficient in combination with the stirring speed operation stability coefficient; The upper limit of the adjusted stirring speed adjustment gradient is obtained by the following formula: Among them, R tc Represents the upper limit of the adjusted stirring speed adjustment gradient; R tc0 It indicates the upper limit of the stirring speed adjustment gradient before adjustment; K indicates the adjustment gradient coefficient.

8. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The concentrate dehydration and drying specifically further comprises the following steps: The concentrate obtained by flotation is sent to the thickener, and the thickening time is controlled to be 4-6 hours, so that the pulp is concentrated to a solid mass fraction of 60%-70%; The concentrated pulp is further dehydrated through a vacuum filter to reduce the solid moisture content of the pulp to 10%-15%; The dehydrated concentrate is sent to a rotary dryer, and the drying temperature is controlled to be 120-150°C, and the drying time is 30-60 minutes, so that the moisture content of the concentrate is reduced to less than 2% to obtain a dry concentrate.

9. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The dry concentrate selection specifically further comprises the following steps: The dried concentrate is fed into a high gradient magnetic separator, the magnetic induction intensity range is controlled to be 0.8-1.5T, the magnetic field intensity is adjusted to separate weakly magnetic minerals and non-magnetic beryllium minerals, and the feed rate is controlled to be 2-5 tons / hour; The concentrate purified by magnetic separation is sent to the vibrating screen to classify the mineral particles; The aperture of the vibrating screen is set to 0.1mm, 0.5mm and 1mm to separate coarse and fine concentrates according to different particle size requirements. The amplitude range is controlled to 2-5mm and the vibration frequency is controlled to 800-1200 times / minute; The selected concentrates classified by particle size are collected through different discharge ports and sent to the product grading and storage stages respectively.

10. The beryllium ore separation and enrichment method according to claim 1, characterized in that: The product classification storage specifically includes the following steps: The concentrated ore is sent to the quality inspection stage, and random samples are taken from the concentrated ore to test the beryllium content, impurity content, particle size distribution and physical stability; According to the test results, the concentrated ore is divided into different grades, and the grade and corresponding batch number are calibrated for each batch of concentrated ore; The graded concentrate is sealed and packaged, and the batch number, grade, weight, production date and usage precautions are marked on the package; The packaged selected concentrate is stored in a special warehouse according to the grading results and stored in different areas according to the concentrate grade.

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