Beneficiation method and system for high-mud and high-silicon fluorite ore

Abstract

The invention relates to the technical field of intelligent beneficiation, and provides a beneficiation method for high-mud and high-silicon fluorite ores, which comprises the following steps of: roughing, grading and selecting for multiple times, returning tailings generated in the selecting process to the same layer of selecting process, and returning the scavenged concentrate in the scavenging process to the previous layer of scavenging process, so as to realize beneficiation of the high-mud and high-silicon fluorite ores. Overflow generated by middling regrinding directly enters the first scavenging process to be scavenged and discharged in advance, the influence on fine powder is reduced, and the whole-flow material flow direction closed loop in the fluorite ore flotation process is achieved. The invention further discloses a system, the flotation indexes that the CaF2 grade is 97.10% and the recovery rate is 82.27% can be obtained through the method and the system, fluorite concentrate reaches the acid-grade first-grade product standard, and efficient recovery of the high-silicon and high-mud refractory fluorite ore is achieved. Meanwhile, sodium carbonate is used as a pH regulator, acidified water glass is used as an inhibitor, modified oleic acid is used as a collecting agent, the fine powder quality and the recovery rate are remarkably improved for flotation of the high-silicon fluorite, and efficient utilization of refractory fluorite resources is achieved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent mineral processing technology, and in particular to a mineral processing method and system for high-mud and high-silicon fluorite ore. Background Art

[0002] As a non-renewable resource, fluorite is widely used in metal smelting, refrigeration, aviation, medicine, new energy batteries and other fields. It is associated with quartz, clay minerals, calcite, barite and other gangue minerals, making it difficult to separate. In metal smelting, fluorite can be used as a flux to reduce the smelting temperature and improve the production efficiency of the furnace. Since it is associated with other minerals, separation is a technical challenge, requiring the use of multiple methods such as physical and chemical methods for efficient separation. The rational development and utilization of mineral resources is also an important part of achieving sustainable development.

[0003] CN115254440B discloses an application of curdlan as a depressant in fluorite flotation and an application method thereof. In the flotation process of fluorite ore, curdlan is added as a depressant. The invention discloses an application method of curdlan as a depressant in fluorite flotation. The flotation operation comprises: firstly roughing, the roughing obtains a roughing concentrate and a roughing tailing, the roughing concentrate is again added with a sodium hydroxide aqueous solution of curdlan for the first concentration, and a primary concentration concentrate and a primary concentration tailing are obtained; the primary concentration concentrate is again added with a sodium hydroxide aqueous solution of curdlan for the second concentration, and a secondary concentration concentrate and a secondary concentration tailing are obtained; the secondary concentration tailing is returned to the previous concentration operation, and the secondary concentration concentrate is again added with a sodium hydroxide aqueous solution of curdlan for the next concentration operation; after repeating the concentration for 6 to 8 times, a fluorite concentrate is obtained; the roughing tailing is subjected to a scavenging operation, and a primary scavenging concentrate and a primary scavenging tailing are obtained after the primary scavenging, and the primary scavenging concentrate and the primary concentration tailing are returned to the roughing operation; the primary scavenging tailing is subjected to a secondary scavenging, and a secondary scavenging concentrate and a final tailing are obtained after the secondary scavenging, and the secondary scavenging concentrate is returned to the primary scavenging operation.

[0004] CN118237171A discloses a beneficiation method for recovering fluorite from tungsten, molybdenum and bismuth associated fluorite ore, comprising: sequentially floating out molybdenum, bismuth and tungsten from the tungsten, molybdenum and bismuth associated fluorite ore to obtain floating tungsten tailings; and performing fluorite flotation on the floating tungsten tailings to obtain floating fluorite concentrate; wherein the flotation reagent used in the fluorite flotation comprises a fluorite collector, and the fluorite collector comprises sodium oleate, benzohydroxamic acid and sodium dodecyl sulfonate.

[0005] CN116899743A discloses a method for applying a fluorite flotation inhibitor in calcite-fluorite separation, comprising the following steps: S1. preparing the fluorite flotation inhibitor: grinding wood chips, pyrolyzing them under a protective atmosphere, and condensing and collecting the gas in the pyrolysis product to obtain a pyrolysis solution, i.e., the flotation inhibitor; S2. grinding the fluorite ore to obtain a slurry, and then sequentially adding a pH adjuster, the flotation inhibitor and a collector to perform rough separation to obtain a fluorite rough concentrate and a fluorite rougher tailing; S3. adding the flotation inhibitor to the fluorite rough concentrate obtained in step S2, performing fine separation to obtain a fluorite concentrate; S4. adding a collector to the fluorite rougher tailing obtained in step S2, performing scavenging to obtain a fluorite tailing.

[0006] In the existing technology, existing fluorite ores are often associated with quartz, clay minerals, calcite, barite, and other gangue minerals, with a grade of 30% to 40%, and some are even below 20%, which are difficult to separate. In addition, mining resources are tight, and the cost of grading and mineral processing is high, resulting in low mineral processing quality and recovery rate, serious waste of resources, and difficulty in meeting actual production needs. Summary of the invention

[0007] Long-term practice has found that, especially for high-silicon, high-mud and difficult-to-select fluorite ores with low fluorite concentrate grade and low recovery rate, the existing flotation process is still used to treat them, resulting in technical problems such as relatively low concentrate quality and recovery rate and serious waste.

[0008] In view of this, the present invention aims to propose a high-mud and high-silicon fluorite ore beneficiation method comprising:

[0009] Step S1, crushing the raw ore to a grinding fineness of less than 0.074 mm and accounting for more than 60% by weight, adding 1800g to 2100g of sodium carbonate, 1000g of acidified water glass, and 500g of fluorite collector per ton of the raw ore for rough selection to obtain a first concentrate and a first tailings, wherein the fluorite collector includes modified oleic acid;

[0010] Step S2, subjecting the first concentrate to a classification and concentration process, and adding acidified water glass during the classification and concentration process; the classification and concentration process at least includes a first concentration process, a second concentration process, and a first scavenging process and a second scavenging process;

[0011] In the first concentration process, 300 g / t of acidified water glass is added to the first concentrate, and after a period of time t1 and stirring, a second concentrate and a second tailings are obtained by separation;

[0012] In the second concentration process, 200 g / t of acidified water glass is added to the second concentrate, and after a period of time t2 and stirring, a third concentrate and a third tailing are obtained by sorting, and the third tailing is added to the second concentration process for concentration;

[0013] In the first scavenging process, the first tailing is added with 100 g / t of the fluorite collector, and stirred for a time of t3 to obtain a first scavenged concentrate and a first scavenged tailing; the first scavenged concentrate is added to the first concentrating process for concentrating; the first scavenged tailing is added to the second scavenging process for scavenging; after the second scavenging process, a second scavenged concentrate and a second scavenged tailing are obtained, and the second scavenged concentrate is added to the first scavenging process for scavenging;

[0014] Grinding the second tailings to a grinding fineness of less than 0.074 mm and accounting for more than 80 weight % to obtain a first-classified concentrate and a second-classified tailings, adding the first-classified concentrate to a first concentration process; adding the second-classified tailings to the first scavenging process for scavenging;

[0015] Step S3: if the fluorite concentrate after the classification and concentration process reaches a preset content ratio, the fluorite concentrate is output.

[0016] In one embodiment, the classification and concentration process further includes a third concentration process, a fourth concentration process, a fifth concentration process and a sixth concentration process, the third concentrate is added to the third concentration process to obtain a fourth concentrate, and the tailings after the third concentration process are returned to the third concentration process for concentration;

[0017] The fourth concentrate is added to the fourth concentration process to obtain a fifth concentrate, and the tailings after the fourth concentration process are returned to the fourth concentration process for concentration;

[0018] The fifth concentrate is added to the fifth concentration process to obtain a sixth concentrate, and the tailings after the fifth concentration process are returned to the fifth concentration process for concentration;

[0019] The sixth concentrate is added into the sixth concentration process to obtain fluorite concentrate, and the tailings after the sixth concentration process are returned to the sixth concentration process for concentration.

[0020] In one embodiment, during the second and third selection processes, 100 g / t of acidified water glass is added and then a stirring operation is performed for time t4.

[0021] In one embodiment, the grading and concentration process also includes a third scavenging process, the second scavenging tailings are added to the third scavenging process for scavenging to obtain a third scavenging concentrate and tailings, and the third scavenging concentrate is returned to the second scavenging process for scavenging.

[0022] In one embodiment, if the calcium fluoride content in the tailings is lower than a preset value, the tailings are directly separated.

[0023] In one embodiment, the times t1, t2, t3, and t4 are all greater than or equal to 2 minutes.

[0024] The present invention also provides a system according to the above-mentioned high-mud and high-silicon fluorite ore beneficiation method, the system comprising:

[0025] A roughing unit is used to crush the raw ore to a grinding fineness of less than 0.074 mm and a proportion of more than 60% by weight, and add 1800g to 2100g of sodium carbonate, 1000g of acidified water glass, and 500g of fluorite collector per ton of raw ore for roughing to obtain a first concentrate and a first tailing, wherein the fluorite collector includes modified oleic acid;

[0026] A beneficiation unit is used to perform a classification beneficiation process on the first concentrate, and add acidified water glass during the classification beneficiation process; the classification beneficiation process at least includes a first beneficiation process, a second beneficiation process, and a first scavenging process and a second scavenging process;

[0027] In the first concentration process, 300 g / t of acidified water glass is added to the first concentrate, and after a period of time t1 and stirring, a second concentrate and a second tailings are obtained by separation;

[0028] In the second concentration process, 200 g / t of acidified water glass is added to the second concentrate, and after a period of time t2 and stirring, a third concentrate and a third tailing are obtained by sorting, and the third tailing is added to the second concentration process for concentration;

[0029] In the first scavenging process, the first tailing is added with 100 g / t of the fluorite collector, and stirred for a time of t3 to obtain a first scavenged concentrate and a first scavenged tailing; the first scavenged concentrate is added to the first concentrating process for concentrating; the first scavenged tailing is added to the second scavenging process for scavenging; after the second scavenging process, a second scavenged concentrate and a second scavenged tailing are obtained, and the second scavenged concentrate is added to the first scavenging process for scavenging;

[0030] Grinding the second tailings to a grinding fineness of less than 0.074 mm and accounting for more than 80 weight % to obtain a first-classified concentrate and a second-classified tailings, adding the first-classified concentrate to a first concentration process; adding the second-classified tailings to the first scavenging process for scavenging;

[0031] The separation unit is used to output the fluorite concentrate if the fluorite concentrate reaches a preset content ratio after the classification and concentration process.

[0032] In one embodiment, the system further comprises a testing unit, which is used to test whether the calcium fluoride content in the fluorite concentrate after the grading and concentration process reaches a preset content ratio; and whether the calcium fluoride content in the tailings is lower than a preset value.

[0033] The present invention provides an electronic device, at least one processor; and

[0034] a memory communicatively connected to the at least one processor; wherein,

[0035] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned high-mud and high-silicon fluorite ore beneficiation method.

[0036] The present invention provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the high-mud and high-silicon fluorite ore beneficiation method of the present application as described above.

[0037] The high-mud and high-silicon fluorite ore beneficiation method disclosed in the present invention first performs rough selection and multiple classification selection on the low-grade high-mud and high-silicon fluorite ore, adds modified oleic acid as a collector, and returns the tailings generated in the selection process to the same layer selection process, returns the scavenged concentrate in the scavenging process to the previous scavenging process, and the overflow of the medium ore re-grinding directly enters the first scavenging process for scavenging and early tailing discharge, thereby reducing the impact on the concentrate powder, and realizing the full-process logistics flow closed loop of the fluorite ore flotation process. The present invention also discloses a system for executing the above-mentioned high-mud and high-silicon fluorite ore beneficiation method, through which the flotation index of CaF2 grade of 97.10% and recovery rate of 82.27% can be obtained, and the fluorite concentrate reaches the acid grade first-class standard, realizing the efficient recovery of high-silicon and high-mud difficult-to-select fluorite ore. At the same time, sodium carbonate is a pH adjuster, acidified water glass is an inhibitor, and modified oleic acid has the effect of significantly improving the quality and recovery rate of concentrate powder for high-silicon fluorite flotation, thereby realizing the efficient utilization of such difficult-to-select fluorite resources.

[0038] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 A schematic diagram of a high-mud and high-silicon fluorite ore beneficiation method according to an embodiment of the present invention;

[0041] Figure 2This is a data diagram of the beneficiation results of high-mud and high-silicon fluorite ore according to an embodiment of the present invention;

[0042] Figure 3 This is a Na2CO3 dosage test result diagram for one embodiment of the present invention;

[0043] Figure 4 A graph showing the results of an acidified water glass dosage test according to an embodiment of the present invention;

[0044] Figure 5 This is a graph showing the results of a grinding fineness test according to an embodiment of the present invention;

[0045] Figure 6 This is a graph showing test results of collector types according to one embodiment of the present invention. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", "third", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] In order to solve the technical problems in the prior art, the fluorite concentrate in the high-silicon and high-mud difficult-to-select fluorite ore has low grade and low recovery rate, and the existing flotation process is used to treat it, the concentrate quality and recovery rate are relatively low and the waste is serious. The present invention provides a high-mud and high-silicon fluorite ore beneficiation method, such as Figure 1-6As shown, a schematic diagram of a high-mud and high-silicon fluorite ore beneficiation method according to an embodiment of the present invention is provided, wherein the high-mud and high-silicon fluorite ore beneficiation method comprises:

[0050] Step S1, crushing the raw ore to a grinding fineness of less than 0.074 mm and accounting for more than 60% by weight, adding 1800g to 2100g of sodium carbonate, 1000g of acidified water glass, and 500g of fluorite collector per ton of the raw ore for rough selection to obtain a first concentrate and a first tailings, wherein the fluorite collector includes modified oleic acid;

[0051] Step S2, subjecting the first concentrate to a classification and concentration process, and adding acidified water glass during the classification and concentration process; the classification and concentration process at least includes a first concentration process, a second concentration process, and a first scavenging process and a second scavenging process;

[0052] In the first concentration process, 300 g / t of acidified water glass is added to the first concentrate, and after a period of time t1 and stirring, a second concentrate and a second tailings are obtained by separation;

[0053] In the second concentration process, 200 g / t of acidified water glass is added to the second concentrate, and after a period of time t2 and stirring, a third concentrate and a third tailing are obtained by sorting, and the third tailing is added to the second concentration process for concentration;

[0054] In the first scavenging process, the first tailing is added with 100 g / t of the fluorite collector, and stirred for a time of t3 to obtain a first scavenged concentrate and a first scavenged tailing; the first scavenged concentrate is added to the first concentrating process for concentrating; the first scavenged tailing is added to the second scavenging process for scavenging; after the second scavenging process, a second scavenged concentrate and a second scavenged tailing are obtained, and the second scavenged concentrate is added to the first scavenging process for scavenging;

[0055] Grinding the second tailings to a grinding fineness of less than 0.074 mm and accounting for more than 80 weight % to obtain a first-classified concentrate and a second-classified tailings, adding the first-classified concentrate to a first concentration process; adding the second-classified tailings to the first scavenging process for scavenging;

[0056] Step S3: if the fluorite concentrate after the classification and concentration process reaches a preset content ratio, the fluorite concentrate is output.

[0057] The high-mud and high-silicon fluorite ore beneficiation method disclosed in the present invention first performs rough selection and multiple classification selection on the low-grade high-mud and high-silicon fluorite ore, adds modified oleic acid as a collector, and returns the tailings generated in the selection process to the same layer selection process, returns the scavenged concentrate in the scavenging process to the previous scavenging process, and the overflow of the medium ore re-grinding directly enters the first scavenging process for scavenging and early tailing discharge, thereby reducing the impact on the concentrate powder, and realizing the full-process logistics flow closed loop of the fluorite ore flotation process. Through this method, the flotation index of CaF2 grade of 97.10% and recovery rate of 82.27% can be obtained, and the fluorite concentrate reaches the acid grade first-class standard, realizing the efficient recovery of high-silicon and high-mud difficult-to-select fluorite ore. At the same time, sodium carbonate is a pH adjuster, acidified water glass is an inhibitor, and the modified oleic acid has the effect of significantly improving the quality and recovery rate of the concentrate powder for the flotation of high-silicon fluorite, thereby realizing the efficient utilization of such difficult-to-select fluorite resources.

[0058] The classification and selection process adopts flotation, and the stirring process is realized by a mechanical stirring flotation machine, which makes the slurry move turbulently. In order to enhance the fixation strength between minerals and bubbles and accelerate the floating speed, oleic acid is used as the basis and modified additives are added to make modified oleic acid. Modified additives include fatty alcohol polyoxyethylene ether. Compared with simple oleic acid, sodium oleate, and oxidized paraffin soap, it has greatly improved the quality and recovery rate of refined powder, such as Figure 6 It is difficult to obtain fluorite concentrate above 97% using conventional fluorite collectors, which is also a significant improvement compared to pure oleic acid.

[0059] The elapsed time t1, t2, t3, and t4 are all the stirring process time of the mechanical stirring flotation machine, and the rotation speed is usually 60 to 180 rpm. The stirring time is 2 to 5 minutes. In step S1, as the grinding fineness continues to increase, the grade of fluorite coarse concentrate is negatively correlated with the recovery rate. The grade gradually increases, while the recovery rate gradually decreases. Figure 5 As shown. Fine grinding is conducive to the improvement of fluorite concentrate grade. Considering the grade and recovery rate of fluorite coarse concentrate, it is determined that the fluorite flotation grinding fineness of -0.074mm accounts for 60% by weight, which is more appropriate. Sodium carbonate is a common slurry pH adjuster for fluorite flotation. Sodium carbonate can not only eliminate Ca in the slurry, but also reduce the pH value of fluorite. 2+ Mg 2 + It can also disperse the mineral mud and reduce or eliminate the adverse effects of the mineral mud. Figure 3As shown in the figure, under the premise of keeping the type and dosage of collector and acidified water glass unchanged, with the increase of Na2CO3 dosage, the grade of fluorite concentrate first increases and then decreases, while the recovery rate shows a trend of gradual increase. When the dosage of sodium carbonate exceeds 2000g / t, the fluorite recovery rate does not increase significantly. On the contrary, due to the excessive dosage of sodium carbonate, the flotation foam becomes sticky and the gangue entrainment becomes larger, which leads to the decrease of fluorite concentrate grade. Therefore, the dosage of sodium carbonate is determined to be 2000g / t. Water glass has a good inhibitory effect on quartz, calcite, fluorite, and silicate minerals, and is used in large quantities as a gangue inhibitor. The main inhibitory components in water glass are HSiO3- and H2SiO3, both of which have strong hydration properties and are highly hydrophilic ions and colloids. They have the same acid radical as silicate minerals and can be adsorbed on the surface of quartz and silicate minerals to form a hydrophilic film on the surface of the minerals, greatly increasing the hydrophilicity of the mineral surface, thereby inhibiting the gangue minerals. Acidified water glass is a commonly used gangue inhibitor in fluorite flotation. When the types and dosages of sodium carbonate and collectors remain unchanged, such as Figure 4 As shown. The amount of acidified water glass has a great influence on the flotation index of fluorite. With the increase of the amount of acidified water glass, the grade of fluorite rough concentrate gradually increases, while the recovery rate gradually decreases. When the amount of acidified water glass added exceeds 1000g / t, the recovery rate decreases significantly. Considering the recovery rate and grade of fluorite comprehensively, it is appropriate to determine the amount of acidified water glass to be 1000g / t. Figure 2 , 6 As shown, the yield (%) is the ratio of output, for example, 100% of raw ore = 24.45% by weight of fluorite concentrate + 75.55% by weight of tailings.

[0060] In steps S1 to S2, since part of the fluorite in the fluorite concentrate is co-growthed with quartz, in order to reduce the over-grinding of fluorite caused by excessive grinding fineness during the roughing process, the second tailings after the first concentration process are re-ground, and the third tailings are fed into the scavenging process to reduce the circulation time of the fine mud in the third tailings in the flotation system, so as to realize the discharge of gangue fine mud tailings as soon as possible and reduce the impact on the quality of the concentrate.

[0061] In order to further improve the CaF2 grade and recovery rate in the concentrate, in another embodiment of the present invention, the classification and concentration process also includes a third concentration process, a fourth concentration process, a fifth concentration process and a sixth concentration process, the third concentrate is added to the third concentration process to obtain a fourth concentrate, and the tailings after the third concentration process are returned to the third concentration process for concentration;

[0062] The fourth concentrate is added to the fourth concentration process to obtain a fifth concentrate, and the tailings after the fourth concentration process are returned to the fourth concentration process for concentration;

[0063] The fifth concentrate is added to the fifth concentration process to obtain a sixth concentrate, and the tailings after the fifth concentration process are returned to the fifth concentration process for concentration;

[0064] The sixth concentrate is added into the sixth concentration process to obtain fluorite concentrate, and the tailings after the sixth concentration process are returned to the sixth concentration process for concentration.

[0065] In order to allow adsorption to occur on the surface of quartz and silicate minerals, form a hydrophilic film on the surface of the minerals, greatly increase the hydrophilicity of the mineral surface, and thereby inhibit the gangue minerals, in another embodiment of the present invention, 100 g / t of acidified water glass is added during the second and third concentration processes and then a stirring operation is performed for time t4.

[0066] In order to improve the recovery rate and reduce the waste of mineral resources, the economy and scavenging efficiency are comprehensively considered. In another embodiment of the present invention, the grading and concentration process also includes a third scavenging process, and the second scavenging tailings are added to the third scavenging process for scavenging to obtain a third scavenging concentrate and tailings, and the third scavenging concentrate is returned to the second scavenging process for scavenging. In another embodiment of the present invention, if the calcium fluoride content in the tailings is lower than a preset value, the tailings are directly separated. In another more preferred embodiment of the invention, the preset value is set to 0.5 to 1 weight %.

[0067] The present invention also discloses a system according to the above-mentioned high-mud and high-silicon fluorite ore beneficiation method, the system comprising:

[0068] A roughing unit is used to crush the raw ore to a grinding fineness of less than 0.074 mm and a proportion of more than 60% by weight, and add 1800g to 2100g of sodium carbonate, 1000g of acidified water glass, and 500g of fluorite collector per ton of raw ore for roughing to obtain a first concentrate and a first tailing, wherein the fluorite collector includes modified oleic acid;

[0069] A beneficiation unit is used to perform a classification beneficiation process on the first concentrate, and add acidified water glass during the classification beneficiation process; the classification beneficiation process at least includes a first beneficiation process, a second beneficiation process, and a first scavenging process and a second scavenging process;

[0070] In the first concentration process, 300 g / t of acidified water glass is added to the first concentrate, and after a period of time t1 and stirring, a second concentrate and a second tailings are obtained by separation;

[0071] In the second concentration process, 200 g / t of acidified water glass is added to the second concentrate, and after a period of time t2 and stirring, a third concentrate and a third tailing are obtained by sorting, and the third tailing is added to the second concentration process for concentration;

[0072] In the first scavenging process, the first tailing is added with 100 g / t of the fluorite collector, and stirred for a time of t3 to obtain a first scavenged concentrate and a first scavenged tailing; the first scavenged concentrate is added to the first concentrating process for concentrating; the first scavenged tailing is added to the second scavenging process for scavenging; after the second scavenging process, a second scavenged concentrate and a second scavenged tailing are obtained, and the second scavenged concentrate is added to the first scavenging process for scavenging;

[0073] Grinding the second tailings to a grinding fineness of less than 0.074 mm and accounting for more than 80 weight % to obtain a first-classified concentrate and a second-classified tailings, adding the first-classified concentrate to a first concentration process; adding the second-classified tailings to the first scavenging process for scavenging;

[0074] The separation unit is used to output the fluorite concentrate if the fluorite concentrate reaches a preset content ratio after the classification and concentration process.

[0075] The present invention discloses a system for executing the above-mentioned high-mud and high-silicon fluorite ore beneficiation method. The system first performs roughing and multiple classification and selection on the low-grade high-mud and high-silicon fluorite ore, adds modified oleic acid as a collector, and returns the tailings generated in the selection process to the same layer selection process, returns the scavenged concentrate in the scavenging process to the previous scavenging process, and the overflow of the medium ore re-grinding directly enters the first scavenging process for scavenging and early tailing discharge, thereby reducing the impact on the concentrate powder and realizing the closed loop of the whole process logistics flow of the fluorite flotation process. The system can obtain the flotation index of CaF2 grade of 97.10% and recovery rate of 82.27%, and the fluorite concentrate reaches the acid grade first-class standard, realizing the efficient recovery of high-silicon and high-mud difficult-to-select fluorite ore. At the same time, sodium carbonate is a pH adjuster, acidified water glass is an inhibitor, and modified oleic acid has the effect of significantly improving the quality and recovery rate of the concentrate powder for the flotation of high-silicon fluorite, thereby realizing the efficient utilization of such difficult-to-select fluorite resources.

[0076] In order to better achieve the control of preset targets and comprehensively consider the economic costs and benefits, in another embodiment of the present invention, the system also includes an inspection unit, which is used to inspect whether the calcium fluoride content in the fluorite concentrate after the grading and concentration process reaches a preset content ratio; and whether the calcium fluoride content in the tailings is lower than a preset value.

[0077] The present invention provides an electronic device, at least one processor; and

[0078] a memory communicatively connected to the at least one processor; wherein,

[0079] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned high-mud and high-silicon fluorite ore beneficiation method.

[0080] The present invention provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the high-mud and high-silicon fluorite ore beneficiation method of the present application as described above.

[0081] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0082] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0083] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for beneficiating high-mud and high-silicon fluorite ore, characterized in that: The high-mud and high-silicon fluorite ore beneficiation method comprises: Step S1, crushing the raw ore to a grinding fineness of less than 0.074 mm and accounting for more than 60% by weight, adding 1800g to 2100g of sodium carbonate, 1000g of acidified water glass, and 500g of fluorite collector per ton of the raw ore for rough selection to obtain a first concentrate and a first tailings, wherein the fluorite collector includes modified oleic acid; Step S2, subjecting the first concentrate to a classification and concentration process, and adding acidified water glass during the classification and concentration process; the classification and concentration process at least includes a first concentration process, a second concentration process, and a first scavenging process and a second scavenging process; In the first concentration process, 300 g / t of acidified water glass is added to the first concentrate, and after a period of time t1 and stirring, a second concentrate and a second tailings are obtained by separation; In the second concentration process, 200 g / t of acidified water glass is added to the second concentrate, and after a period of time t2 and stirring, a third concentrate and a third tailing are obtained by sorting, and the third tailing is added to the second concentration process for concentration; In the first scavenging process, the first tailing is added with 100 g / t of the fluorite collector, and stirred for a time of t3 to obtain a first scavenged concentrate and a first scavenged tailing; the first scavenged concentrate is added to the first concentrating process for concentrating; the first scavenged tailing is added to the second scavenging process for scavenging; after the second scavenging process, a second scavenged concentrate and a second scavenged tailing are obtained, and the second scavenged concentrate is added to the first scavenging process for scavenging; Grinding the second tailings to a grinding fineness of less than 0.074 mm and accounting for more than 80 weight % to obtain a first-classified concentrate and a second-classified tailings, adding the first-classified concentrate to a first concentration process; adding the second-classified tailings to the first scavenging process for scavenging; Step S3: if the fluorite concentrate after the classification and concentration process reaches a preset content ratio, the fluorite concentrate is output.

2. The high-mud and high-silicon fluorite ore beneficiation method according to claim 1, characterized in that: The classification and concentration process also includes a third concentration process, a fourth concentration process, a fifth concentration process and a sixth concentration process, wherein the third concentrate is added to the third concentration process to obtain a fourth concentrate, and the tailings after the third concentration process are returned to the third concentration process for concentration; The fourth concentrate is added to the fourth concentration process to obtain a fifth concentrate, and the tailings after the fourth concentration process are returned to the fourth concentration process for concentration; The fifth concentrate is added to the fifth concentration process to obtain a sixth concentrate, and the tailings after the fifth concentration process are returned to the fifth concentration process for concentration; The sixth concentrate is added into the sixth concentration process to obtain fluorite concentrate, and the tailings after the sixth concentration process are returned to the sixth concentration process for concentration.

3. The method for beneficiating high-mud and high-silicon fluorite ore according to claim 2, characterized in that: During the second and third selection processes, 100 g / t of acidified water glass is added and then stirred for time t4.

4. The high-mud and high-silicon fluorite ore beneficiation method according to claim 1, characterized in that: The grading and concentration process also includes a third scavenging process, in which the second scavenging tailings are added to the third scavenging process for scavenging to obtain a third scavenging concentrate and tailings, and the third scavenging concentrate is returned to the second scavenging process for scavenging.

5. The high-mud and high-silicon fluorite ore beneficiation method according to claim 4, characterized in that: If the calcium fluoride content in the tailings is lower than the preset value, the tailings are directly separated.

6. The high-mud and high-silicon fluorite ore beneficiation method according to any one of claims 1 to 5, characterized in that: Times t1, t2, t3, and t4 are all greater than or equal to 2 minutes.

7. A system for the beneficiation of high-mud and high-silicon fluorite ore according to any one of claims 1 to 6, characterized in that: The system comprises, A roughing unit is used to crush the raw ore to a grinding fineness of less than 0.074 mm and a proportion of more than 60% by weight, and add 1800g to 2100g of sodium carbonate, 1000g of acidified water glass, and 500g of fluorite collector per ton of raw ore for roughing to obtain a first concentrate and a first tailing, wherein the fluorite collector includes modified oleic acid; A beneficiation unit is used to perform a classification beneficiation process on the first concentrate, and add acidified water glass during the classification beneficiation process; the classification beneficiation process at least includes a first beneficiation process, a second beneficiation process, and a first scavenging process and a second scavenging process; In the first concentration process, 300 g / t of acidified water glass is added to the first concentrate, and after a period of time t1 and stirring, a second concentrate and a second tailings are obtained by separation; In the second concentration process, 200 g / t of acidified water glass is added to the second concentrate, and after a period of time t2 and stirring, a third concentrate and a third tailing are obtained by sorting, and the third tailing is added to the second concentration process for concentration; In the first scavenging process, the first tailing is added with 100 g / t of the fluorite collector, and stirred for a time of t3 to obtain a first scavenged concentrate and a first scavenged tailing; the first scavenged concentrate is added to the first concentrating process for concentrating; the first scavenged tailing is added to the second scavenging process for scavenging; after the second scavenging process, a second scavenged concentrate and a second scavenged tailing are obtained, and the second scavenged concentrate is added to the first scavenging process for scavenging; Grinding the second tailings to a grinding fineness of less than 0.074 mm and accounting for more than 80 weight % to obtain a first-classified concentrate and a second-classified tailings, adding the first-classified concentrate to a first concentration process; adding the second-classified tailings to the first scavenging process for scavenging; The separation unit is used to output the fluorite concentrate if the fluorite concentrate reaches a preset content ratio after the classification and concentration process.

8. The system according to claim 7, characterized in that The system also includes a testing unit, which is used to test whether the calcium fluoride content in the fluorite concentrate after the classification and concentration process reaches a preset content ratio; and whether the calcium fluoride content in the tailings is lower than a preset value.

9. An electronic device, characterized in that: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the high-mud and high-silicon fluorite ore beneficiation method described in any one of claims 1-6.

10. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions for enabling a machine to execute the high-mud and high-silicon fluorite ore beneficiation method of the present invention as described in any one of claims 1-6.

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