An ion-regulating inhibitor for preventing slime capping, its application, and a beneficiation method for lepidolite ore

Abstract

The present invention relates to an ion-adjusting inhibitor for preventing slime capping, an application thereof, and a beneficiation method for lepidolite ore. The ion-adjusting inhibitor for preventing slime capping includes a starch inhibitor, a sodium salt inhibitor, and a metal ion regulator. The present invention provides an application of the ion-adjusting inhibitor for preventing slime capping as described in the present invention in the beneficiation of lepidolite ore. The present invention provides a beneficiation method for lepidolite ore, which includes the following steps: adding water to the ore powder of lepidolite ore to make a pulp; adding a pH adjuster, a collector, and the ion-adjusting inhibitor as described in the present invention to the pulp for rough selection to obtain a rough concentrate and a rough tailing; adding the ion-adjusting inhibitor as described in the present invention to the rough concentrate for cleaning to obtain a lepidolite concentrate; adding a collector to the rough tailing for scavenging to obtain a flotation tailing. The present invention solves the problems of large lithium ore loss, low beneficiation efficiency, and complex process existing in the existing beneficiation method for lepidolite ore.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium mica ore treatment, and particularly relates to an ion regulation inhibitor for preventing ore slime capping, an application thereof, and a beneficiation method for lithium mica ore. Background Art

[0002] Extracting lithium from natural resources has become the key to the rapid development of emerging industries. With the continuous development of lithium resources in China, high-grade and easily processed ore resources are gradually exhausted. Therefore, how to break through the limitations of lithium resource utilization, especially the efficient development of lean ore, fine-grained and complex symbiotic lithium mica ore unique to China, is particularly important and has broad development prospects.

[0003] Due to the different occurrence states of lithium in minerals, various types of gangue minerals, and the complexity of the lithium chemical decomposition process, the separation process of lithium ore is correspondingly complex. In industrial practice, flotation is generally used to treat lithium mica ore at home and abroad. However, since lithium mica ore usually contains a relatively high proportion of mud, desliming treatment is required before flotation. Usually, a 250 cyclone is used to remove fine-grained materials below 400 mesh. The desliming process not only causes nearly 20% loss of lithium minerals, resulting in a huge waste of lithium resources, but also the desliming operation often fails to completely remove ore slime. The residual ore slime will deteriorate the flotation environment of lithium minerals, consume a large amount of collector, and reduce the beneficiation efficiency of lithium ore.

[0004] In view of the physical and chemical properties of lithium ore raw materials, researching new agents for preventing ore slime capping and efficient lithium mica flotation processes to avoid the desliming step, so as to achieve a substantial breakthrough in lithium ore extraction technically and realize the efficient recovery of lithium resources, has important practical significance for maintaining sustainable development. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an ion regulation inhibitor for preventing ore slime capping, an application thereof, and a beneficiation method for lithium mica ore, so as to solve the problems of large lithium ore loss, low beneficiation efficiency, and complex process existing in the existing beneficiation method for lithium mica ore.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present invention is as follows:

[0007] An ion regulation inhibitor for preventing ore slime capping, comprising a starch inhibitor, a sodium salt inhibitor, and a metal ion regulator.

[0008] According to the above technical means, by skillfully combining a starch inhibitor, a sodium salt inhibitor, and a metal ion regulator as an ion adjustment inhibitor in spodumene ore dressing, the super dispersing ability of the starch inhibitor is combined with the selective inhibition of the sodium salt, and then through the competitive adsorption of metal ion regulation and slime, the slime is effectively dispersed, the activity of the slime is weakened, and the target minerals are effectively prevented from being covered by the slime. Thus, the flotation of lepidolite ore can be carried out without desliming, and the mineral recovery rate and concentrate quality in the ore dressing process can be improved. The combined use of the starch inhibitor, the sodium salt inhibitor, and the metal ion regulator can more precisely adjust the charge and hydrophobicity on the mineral surface, reducing unnecessary reagent waste. The use of this inhibitor helps to reduce the usage amount of environmentally harmful chemicals and reduce the environmental impact of the ore dressing process. The ion adjustment inhibitor can stabilize the charge state on the mineral surface, reduce fluctuations during the operation process, and improve the stability of the ore dressing operation. It has the advantages of saving reagent usage cost, simple process flow, and stable and controllable production.

[0009] Preferably, the starch inhibitor is selected from one or two of aluminum octenyl succinate starch and phosphorylated distarch phosphate.

[0010] Preferably, the sodium salt inhibitor is selected from one or two of sodium alginate and sodium gluconate.

[0011] Preferably, the metal ion regulator is selected from at least one of ferrous sulfate (FeSO4), zinc sulfate (ZnSO4), and magnesium sulfate (MgSO4).

[0012] Preferably, the mass percentages of the starch inhibitor, the sodium salt inhibitor, and the metal ion regulator are 20 - 30%: 50 - 60%: 10 - 20%.

[0013] The present invention also provides an application of the ion adjustment inhibitor for preventing slime covering as described in the present invention in the dressing of lepidolite ore.

[0014] The present invention also provides a method for dressing lepidolite ore, comprising the following steps:

[0015] S1. Pulp making: Adding water to the ore powder of lepidolite ore to make a pulp;

[0016] S2. Rough selection: Adding a pH adjuster, a collector, and the ion adjustment inhibitor described in the present invention to the pulp for rough selection to obtain a rough selection concentrate and a rough selection tailing;

[0017] S3. Fine selection and scavenging: Adding the ion adjustment inhibitor described in the present invention to the rough selection concentrate for fine selection to obtain a lepidolite concentrate; adding a collector to the rough selection tailing for scavenging to obtain a flotation tailing.

[0018] According to the above technical means, by skillfully combining a pH regulator, a collector, and the ion regulation inhibitor of the present invention in the rough selection stage, the recovery rate of lepidolite is effectively improved, thereby improving the overall ore dressing efficiency. In the concentration and scavenging stages, the rough concentrate and the rough tailings are treated respectively, so that the lepidolite concentrate and the flotation tailings can be more precisely separated, optimizing the ore dressing process. The ore dressing method of the present invention only uses the ion regulation inhibitor and the collector of the present invention in the concentration and scavenging processes, effectively reducing environmental pollution and energy consumption. Moreover, the steps of the ore dressing method are clear, the operation is simple, it is easy to be implemented in industrial production, which is beneficial to improving production efficiency and reducing operation costs. Through the concentration step, a higher purity lepidolite concentrate can be obtained, meeting the requirements of different industrial applications for the quality of lepidolite.

[0019] Preferably, the pH regulator is selected from one or two of calcium oxide (CaO) and sodium carbonate (Na2CO3).

[0020] Preferably, the collector is composed of triethanolamine cocoyl alaninate, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate, and sodium lauroyl isethionate.

[0021] Preferably, the mass percentages of triethanolamine cocoyl alaninate, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate, and sodium lauroyl isethionate are 20% - 30%: 20 - 30%: 10 - 20%: 20 - 30%: 10 - 20%.

[0022] Preferably, the collector is composed of 25% triethanolamine cocoyl alaninate, 25% stearamidopropyl dimethylamine, 20% coconut amine, 15% castor oil phosphate, and 15% sodium lauroyl isethionate.

[0023] Preferably, in the rough selection, the addition amount of the pH regulator is 150 - 200 g / t.

[0024] Preferably, in the rough selection, the addition amount of the collector is 300 - 500 g / t.

[0025] Preferably, in the rough selection, the addition amount of the ion regulation inhibitor is 150 - 250 g / t.

[0026] Preferably, in the first concentration of the concentration process, the addition amount of the ion regulation inhibitor is 100 - 150 g / t, and the time of the first concentration is 1.5 - 2 min.

[0027] Preferably, the number of concentration times is 1 - 2 times.

[0028] Preferably, in the first scavenging of the scavenging process, the addition amount of the collector is 150 - 250 g / t, and the time of the first scavenging is 1 - 1.5 min.

[0029] Preferably, the number of scavenging operations is 1 to 3 times, and the scavenging concentrate obtained from the subsequent scavenging operation is returned to the previous scavenging operation, and the scavenging concentrate obtained from the first scavenging operation is returned to the roughing operation.

[0030] Preferably, the number of roughing operations is 1 to 2 times.

[0031] Preferably, the froth scraping time for roughing is 2 to 4 minutes.

[0032] Preferably, the froth scraping time for cleaning and scavenging is 1 to 3 minutes.

[0033] Preferably, the fine powder with a fineness of -0.074 mm in the ore powder of the lepidolite ore accounts for 60 to 65% of the total amount.

[0034] Preferably, the lepidolite ore includes lithium minerals such as lithium muscovite and triphylite.

[0035] Preferably, the concentration of the ore powder in the pulp is 30 to 40%.

[0036] Advantages of the present invention:

[0037] The ion adjustment inhibitor for preventing slime covering in the present invention, by skillfully combining a starch inhibitor, a sodium salt inhibitor and a metal ion regulator as an ion adjustment inhibitor in the flotation of lithium ore, the super dispersing ability of the starch inhibitor is combined with the selective inhibition of the sodium salt, and then through the competitive adsorption effect of metal ion adjustment and slime, the slime is effectively dispersed, the activity of the slime is weakened, and the target mineral is effectively prevented from being covered by slime. Thus, the flotation of lepidolite ore can be carried out under the premise of not desliming, and the mineral recovery rate and concentrate quality in the beneficiation process can be improved. The combined use of the starch inhibitor, the sodium salt inhibitor and the metal ion regulator can more precisely adjust the charge and hydrophobicity on the mineral surface, reducing unnecessary reagent waste. The use of this inhibitor helps to reduce the amount of environmentally harmful chemicals used and reduce the environmental impact of the beneficiation process. The ion adjustment inhibitor can stabilize the charge state on the mineral surface, reduce fluctuations during the operation process, and improve the stability of the beneficiation operation. It has the advantages of saving reagent dosage cost, simple process flow and stable and controllable production.

[0038] The ore dressing method of lepidolite ore of the present invention effectively improves the recovery rate of lepidolite by skillfully combining a pH adjuster, a collector, and the ion adjustment inhibitor of the present invention in the rough selection stage, thereby improving the overall ore dressing efficiency. By treating the rough concentrate and the rough tailings respectively in the cleaning and scavenging stages, the lepidolite concentrate and the flotation tailings can be separated more precisely, optimizing the ore dressing process. The ore dressing method of the present invention only uses the ion adjustment inhibitor and the collector of the present invention in the cleaning and scavenging processes, effectively reducing environmental pollution and energy consumption. Moreover, the steps of the ore dressing method are clear, the operation is simple, and it is easy to implement in industrial production, which is beneficial to improving production efficiency and reducing operation costs, and has great popularization and application value in the technical field of lepidolite ore treatment. Brief Description of the Drawings

[0039] Figure 1 It is a flow chart of the ore dressing method for lepidolite ore. Detailed Embodiments

[0040] The following will describe the embodiments of the present invention with reference to the preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0041] The present invention aims to disclose an ion adjustment inhibitor, application, and ore dressing method for lepidolite ore to prevent slime covering, so as to solve the problems of large lithium ore loss, low ore dressing efficiency, and complex process existing in the existing ore dressing methods for lepidolite ore.

[0042] Among them, an ion adjustment inhibitor for preventing slime covering includes a starch inhibitor, a sodium salt inhibitor, and a metal ion regulator.

[0043] In some embodiments, the starch inhibitor is selected from one or two of octenyl succinic anhydride aluminum starch and phosphorylated distarch phosphate.

[0044] In some embodiments, the sodium salt inhibitor is selected from one or two of sodium alginate and sodium gluconate.

[0045] In some embodiments, the metal ion regulator is selected from at least one of ferrous sulfate (FeSO4), zinc sulfate (ZnSO4), and magnesium sulfate (MgSO4).

[0046] In some embodiments, the mass percentages of the starch inhibitor, the sodium salt inhibitor, and the metal ion regulator are 20 - 30%: 50 - 60%: 10 - 20%.

[0047] In some embodiments, there is also provided an application of an ion adjustment inhibitor for preventing the covering of slime in the ore dressing of lepidolite ore.

[0048] In some embodiments, there is also provided a method for ore dressing of lepidolite ore, comprising the following steps:

[0049] S1. Pulping: Adding water to the ore powder of lepidolite ore to make ore pulp;

[0050] S2. Rough selection: Adding a pH adjuster, a collector and the above ion adjustment inhibitor to the ore pulp for rough selection to obtain a rough concentrate and a rough tailing;

[0051] S3. Fine selection and scavenging: Adding the above ion adjustment inhibitor to the rough concentrate for fine selection to obtain a lepidolite concentrate; adding a collector to the rough tailing for scavenging to obtain a flotation tailing.

[0052] In some embodiments, the pH adjuster is selected from one or two of calcium oxide (CaO) and sodium carbonate (Na2CO3);

[0053] In some embodiments, the collector is composed of triethanolamine cocoyl alaninate, stearamide propyl dimethylamine, cocoamine, castor oil phosphate and sodium lauroyl hydroxyethyl sulfonate.

[0054] In some embodiments, the mass percentages of triethanolamine cocoyl alaninate, stearamide propyl dimethylamine, cocoamine, castor oil phosphate and sodium lauroyl hydroxyethyl sulfonate are 20% - 30%: 20 - 30%: 10 - 20%: 20 - 30%: 10 - 20%.

[0055] Exemplarily, the collector is composed of 25% triethanolamine cocoyl alaninate, 25% stearamide propyl dimethylamine, 20% cocoamine, 15% castor oil phosphate and 15% sodium lauroyl hydroxyethyl sulfonate.

[0056] In some embodiments, in the rough selection, the addition amount of the pH adjuster is 150 - 200 g / t.

[0057] In some embodiments, in the rough selection, the addition amount of the collector is 300 - 500 g / t.

[0058] In some embodiments, in the rough selection, the addition amount of the ion adjustment inhibitor is 150 - 250 g / t.

[0059] In some embodiments, in the first fine selection of the fine selection, the addition amount of the ion adjustment inhibitor is 100 - 150 g / t, and the time of the first fine selection is 1.5 - 2 min.

[0060] In some embodiments, the number of selective separations is 1 to 2 times.

[0061] In some embodiments, the addition amount of the collector in the first scavenging is 150 - 250 g / t, and the time of the first scavenging is 1 - 1.5 min.

[0062] In some embodiments, the number of scavenging times is 1 - 3 times. The scavenging concentrate obtained from the subsequent scavenging is returned to the previous scavenging, and the scavenging concentrate obtained from the first scavenging is returned to the roughing.

[0063] In some embodiments, the number of roughing times is 1 - 2 times.

[0064] In some embodiments, the froth scraping time of the roughing is 2 - 4 min.

[0065] In some embodiments, the froth scraping time of the selective separation and the scavenging is 1 - 3 min.

[0066] In some embodiments, the fine powder with a fineness of -0.074 mm in the ore powder of the lepidolite ore accounts for 60 - 65% of the total amount.

[0067] In some embodiments, the lepidolite ore includes lithium minerals such as lithium muscovite and triphylite.

[0068] In some embodiments, the concentration of the ore powder in the pulp is 30 - 40%.

[0069] To make the technical problems, technical solutions and beneficial effects solved by this application clearer, the following will further describe in detail the ion - regulating inhibitor for preventing slime capping and the beneficiation method of lepidolite ore of the present invention in combination with specific embodiments and drawings. Obviously, the specific embodiments described are only a part of the embodiments in this application, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits this application and its application. Based on the specific embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by this application.

[0070] For those not specifying specific technologies or conditions in the specific embodiments, follow the technologies or conditions described in the literature in this field or according to the product specifications. For reagents or instruments not indicating the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0071] An ion - regulating inhibitor for preventing slime capping is obtained by uniformly mixing 25% aluminum octenyl succinate starch, 55% sodium alginate and 20% ferrous sulfate (FeSO4) by mass percentage.

[0072] As Figure 1As shown in the figure, a beneficiation method for lepidolite ore includes the following steps:

[0073] S1. Pulp preparation: Add water to the ore powder sample of lepidolite ore to make pulp; among them, the ore powder sample of lepidolite ore is from the raw ore of a beneficiation plant in Binjiang Industrial Park, Yichun City. The ore powder with a particle size of -0.074mm in the ore powder sample accounts for 60% of the total amount, and the mass percentage content of Li2O in the ore powder sample is 0.23% - 0.25%; the concentration of ore powder in the pulp is 30%; the ore powder sample of lepidolite ore is directly made into pulp by adding water without desliming for the flotation process;

[0074] S2. Rough selection: Transfer the pulp to a 1.5L XFD flotation cell for rough selection. In the rough selection, add the pH adjuster CaO, the ion adjustment inhibitor prepared in Example 1, and the collector in sequence. After stirring for 2 minutes each, start aeration flotation to obtain the rough selection concentrate and the rough selection tailings; among them, the dosage of the pH adjuster is 150g per ton of flotation lepidolite ore pulp; the dosage of the inhibitor is 200g per ton of flotation lepidolite ore pulp; the dosage of the collector is 400g per ton of flotation lepidolite ore pulp; after stirring, carry out aeration flotation and foam scraping to obtain the rough selection concentrate and the rough selection tailings; the collector is a mixture of 25% coconut oil acyl alanine triethanolamine, 25% stearamide propyl dimethylamine, 20% coconut amine, 15% castor oil phosphate, and 15% sodium lauroyl hydroxyethyl sulfonate;

[0075] S3. Fine selection and scavenging: Add 100g / t of the ion adjustment inhibitor in Example 1 to the rough selection concentrate for fine selection. The aeration flotation and foam scraping time for fine selection is 2 minutes. After one-time fine selection, obtain the lepidolite concentrate and middling 1; add the collector with the same composition as in S2 to the rough selection tailings for three-time scavenging. The dosage of the collector added each time is 200g / t, and the aeration flotation and foam scraping time for each scavenging is 2 minutes. The scavenging concentrate is returned in sequence (that is, the scavenging concentrate obtained in the subsequent scavenging (i.e., Figure 1 the middling 2, middling 3, and middling 4) is returned to the previous scavenging, and the scavenging concentrate obtained in the first scavenging is returned to the rough selection), and the flotation tailings obtained in the third scavenging are discharged.

[0076] An ion adjustment inhibitor for preventing ore mud capping, by mass percentage, includes 20% phosphorylated distarch phosphate, 60% sodium gluconate, 10% zinc sulfate (ZnSO4), and 10% magnesium sulfate (MgSO4) mixed evenly.

[0077] As Figure 1 shown in the figure, a beneficiation method for lepidolite ore includes the following steps:

[0078] S1. Pulp making: Add water to the ore powder sample of lepidolite ore to make pulp; among them, the ore powder sample of lepidolite ore is from a certain lepidolite raw ore in Yifeng County, and the ore powder with a particle size of -0.074 mm in the ore powder sample accounts for 65% of the total amount, and the mass percentage of Li2O in the ore powder sample is 0.28% - 0.30%; the concentration of ore powder in the pulp is 35%; the ore powder sample of lepidolite ore is directly added with water without de-sludging to make pulp for the flotation process;

[0079] S2. Rough selection: Transfer the pulp to a 1.5L XFD flotation cell for rough selection. In the rough selection, successively add the pH regulator Na2CO3, the ion regulation inhibitor prepared in Example 3, and the collector. After stirring for 2 minutes each, start aeration flotation to obtain the rough concentrate and the rough tailings; among them, the dosage of the pH regulator is 180 g per ton of flotation lepidolite pulp; the dosage of the inhibitor is 250 g per ton of flotation lepidolite pulp; the dosage of the collector is 350 g per ton of flotation lepidolite pulp; after stirring, carry out aeration flotation and foam scraping to obtain the rough concentrate and the rough tailings; the collector is a mixture of 25% cocoyl alanine triethanolamine, 25% stearamide propyl dimethylamine, 20% coconut amine, 15% castor oil phosphate, and 15% sodium lauroyl isethionate;

[0080] S3. Fine selection and scavenging: Add 150 g / t of the ion regulation inhibitor in Example 3 to the rough concentrate for fine selection. The aeration flotation and foam scraping time for fine selection is 3 minutes. After the first fine selection, obtain the lepidolite concentrate and Middling 1; add the collector with the same composition as in S2 to the rough tailings for three scavenging operations. The dosage of the collector added each time is 180 g / t, and the aeration flotation and foam scraping time for each scavenging operation is 3 minutes. The scavenging concentrate is returned in sequence (that is, the scavenging concentrate obtained from the latter scavenging operation (i.e., Middling 2, Middling 3, and Middling 4 in Figure 1 is returned to the previous scavenging operation, and the scavenging concentrate obtained from the first scavenging operation is returned to the rough selection), and the flotation tailings obtained from the third scavenging operation are discharged.

[0081] Control Example 1

[0082] A beneficiation method for lepidolite ore, comprising the following steps:

[0083] S1. Pulp making: Add water to the ore powder sample of lepidolite ore to make pulp; among them, the ore powder sample of lepidolite ore is from the raw ore of a certain beneficiation plant in Binjiang Industrial Park, Yichun City. The ore powder with a particle size of -0.074 mm in the ore powder sample accounts for 60% of the total amount, and the mass percentage of Li2O in the ore powder sample is 0.23% - 0.25%; the concentration of ore powder in the pulp is 30%; the ore powder sample of lepidolite ore is directly added with water without de-sludging to make pulp for the flotation process;

[0084] S2. Rough selection: Transfer the pulp to an XFD type 1.5L flotation cell for rough selection. In rough selection, add pH regulator CaO, inhibitor and collector in sequence. After 2 minutes of stirring for each, start aerated flotation to obtain rough concentrate and rough tailings. Among them, the dosage of the pH regulator is 150 g per ton of flotation spodumene pulp; the dosage of the inhibitor is 200 g per ton of flotation spodumene pulp; the dosage of the collector is 400 g per ton of flotation spodumene pulp. After stirring, carry out aerated flotation and foam scraping to obtain rough concentrate and rough tailings. The inhibitor is a mixture of sodium hexametaphosphate and sodium carbonate with a mass ratio of 2:1; the collector is a mixture of oxidized paraffin soap and dodecylamine with a mass ratio of 3:1;

[0085] S3. Scavenging and cleaning: Add 100 g / t of the same inhibitor as in S2 to the rough concentrate for cleaning. The aerated flotation and foam scraping time for cleaning is 2 minutes. After one-time cleaning, spodumene concentrate is obtained; Add the collector with the same composition as in S2 to the rough tailings for three-time scavenging. The dosage of the collector added each time is 200 g / t. The aerated flotation and foam scraping time for each scavenging is 2 minutes. The scavenged concentrate is returned in sequence (that is, the scavenged concentrate obtained from the latter scavenging is returned to the previous scavenging, and the scavenged concentrate obtained from the first scavenging is returned to rough selection). The flotation tailings obtained from the third scavenging are discharged.

[0086] Control Example 2

[0087] A beneficiation method for spodumene ore, comprising the following steps:

[0088] S1. Pulp making: Add water to the ore powder sample of spodumene ore to make pulp. Among them, the ore powder sample of spodumene ore comes from a certain spodumene raw ore in Yifeng County. The ore powder with a particle size of -0.074 mm in the ore powder sample accounts for 65% of the total amount. The mass percentage of Li2O in the ore powder sample is 0.28% - 0.30%; the concentration of the ore powder in the pulp is 35%; the ore powder sample of spodumene ore is directly made into pulp by adding water without desliming for the flotation process;

[0089] S2. Rough selection: Transfer the pulp to an XFD type 1.5L flotation cell for rough selection. In rough selection, add pH regulator CaO, inhibitor and collector in sequence. After 2 minutes of stirring for each, start aerated flotation to obtain rough concentrate and rough tailings. Among them, the dosage of the pH regulator is 180 g per ton of flotation spodumene pulp; the dosage of the inhibitor is 250 g per ton of flotation spodumene pulp; the dosage of the collector is 350 g per ton of flotation spodumene pulp. After stirring, carry out aerated flotation and foam scraping to obtain rough concentrate and rough tailings. The inhibitor is a mixture of sodium hexametaphosphate and sodium hydroxide with a mass ratio of 3:1; the collector is a mixture of sodium dodecyl sulfonate and octadecylamine with a mass ratio of 2:1;

[0090] S3. Scavenging and cleaning: Add 150 g / t of the same depressant as in S2 to the rougher concentrate for cleaning. The aeration flotation and skimming time for cleaning is 3 min. After the first cleaning, lepidolite concentrate and middlings 1 are obtained. Add a collector with the same composition as in S2 to the rougher tailings for three scavenging operations. The collector added each time is 180 g / t, and the aeration flotation and skimming time for each scavenging operation is 3 min. The scavenger concentrates are returned in sequence (i.e., the scavenger concentrates obtained from the subsequent scavenging operations (i.e., Figure 1 middlings 2, middlings 3, and middlings 4 in

[0091] Control Example 3

[0092] A beneficiation method for lepidolite ore, comprising the following steps:

[0093] S1. Pulp preparation: Add water to the ore powder sample of lepidolite ore to make pulp. Among them, the ore powder sample of lepidolite ore is from a certain lepidolite raw ore in Yifeng County. The ore powder with a particle size of -0.074 mm in the ore powder sample accounts for 65% of the total amount, and the mass percentage of Li2O in the ore powder sample is 0.28% - 0.30%.

[0094] S2. Pre-thickening: Use a 250 hydrocyclone to perform pre-thickening operation (agitation thickening) on the pulp made in S1 for 35 min to obtain thickened pulp and pre-treated thickened slime.

[0095] S3. Rougher: Transfer the thickened pulp to a 1.5 L XFD flotation cell for rougher flotation. Sequentially add pH regulator CaO, depressant, and collector to the rougher flotation. After 2 min of stirring each, start aeration flotation to obtain rougher concentrate and rougher tailings. Among them, the dosage of the pH regulator is 180 g per ton of flotation lepidolite pulp; the dosage of the depressant is 250 g per ton of flotation lepidolite pulp; the dosage of the collector is 350 g per ton of flotation lepidolite pulp. After stirring, perform aeration flotation and skimming to obtain rougher concentrate and rougher tailings. The depressant is a mixture of sodium hexametaphosphate and sodium hydroxide with a mass ratio of 3:1; the collector is a mixture of sodium dodecyl sulfonate and octadecylamine with a mass ratio of 2:1.

[0096] S4. Scavenging and cleaning: Add 150 g / t of the same depressant as in S3 to the rougher concentrate for cleaning. The aeration flotation and skimming time for cleaning is 3 min. After the first cleaning, lepidolite concentrate is obtained. Add a collector with the same composition as in S3 to the rougher tailings for three scavenging operations. The collector added each time is 180 g / t, and the aeration flotation and skimming time for each scavenging operation is 3 min. The scavenger concentrates are returned in sequence (i.e., the scavenger concentrates obtained from the subsequent scavenging operations are returned to the previous scavenging operation, and the scavenger concentrate obtained from the first scavenging operation is returned to the rougher). The flotation tailings obtained from the third scavenging operation are discharged.

[0097] Detection and analysis

[0098] For Example 1 and Example 2, as well as the spodumene concentrate, pretreated mud-removed ore, middlings in scavenging, and flotation tailings obtained after three scavengings in Control Example 1 to Control Example 3, detection and analysis were carried out. The results are shown in Table 1.

[0099] Among them, the calculation method of yield is: yield = (concentrate mass / raw ore mass) × 100%

[0100] The grade of Li2O was measured by atomic absorption spectrophotometry (AAS).

[0101] The calculation method of the recovery rate of Li2O is as follows. Recovery rate = [(yield of the product × grade of the product) / grade of the raw ore] × 100%

[0102] Table 1 shows the detection results of spodumene concentrate, pretreated mud-removed ore, middlings in scavenging, and flotation tailings obtained after three scavengings

[0103]

[0104] It can be seen from the results in Table 1 that for the flotation methods of Example 2 and Example 4 of the present invention, the total recovery rate of lithium oxide in the spodumene concentrate and middlings in scavenging obtained by direct flotation without pre-desliming treatment can reach more than 85%, and the grade of the obtained spodumene concentrate is significantly higher than that of Control Example 1-2; the grade of lithium oxide in the tailings is lower than that of Control Example 1-2; in Control Example 1-2, conventional inhibitors were used for the flotation of spodumene raw ore. Due to its low dispersion performance, the grade and recovery rate of the final product spodumene concentrate are significantly lower than those of Example 2 and Example 4.

[0105] In Control Example 3, the currently relatively conventional and general spodumene ore desliming flotation process was adopted. First, the pulp was stirred and deslimed pretreated, and then inhibitors and collectors were added for flotation. Although the grade of the spodumene concentrate was improved to a certain extent, the final recovery rate of lithium oxide was low. This is because the 250 hydrocyclone desliming pretreatment process would cause about 20% of the lithium oxide concentrate to be removed together, resulting in a large waste of lithium resources, affecting the final recovery rate of lithium oxide in the flotation concentrate, and increasing the desliming process treatment time and cost.

[0106] Therefore, for the flotation method of the present invention, the lithium grade in the spodumene concentrate obtained by direct flotation without pre-desliming treatment has been significantly improved, and at the same time, the lithium grade in the flotation tailings has been significantly reduced.

[0107] In summary, the ion regulation inhibitor for preventing slime capping in the present invention effectively prevents the phenomenon of slime capping the target minerals by ingeniously combining a starch inhibitor, a sodium salt inhibitor, and a metal ion regulator as an ion regulation inhibitor in spodumene ore dressing. Thus, spodumene ore flotation can be carried out without prior desliming, and the mineral recovery rate and concentrate quality in the ore dressing process can be improved. The combined use of the starch inhibitor, the sodium salt inhibitor, and the metal ion regulator can more precisely regulate the charge and hydrophobicity of the mineral surface, reducing unnecessary reagent waste. The use of this inhibitor helps to reduce the amount of environmentally harmful chemicals used and reduce the environmental impact of the ore dressing process. The ion regulation inhibitor can stabilize the charge state of the mineral surface, reduce fluctuations during the operation process, and improve the stability of the ore dressing operation. It has the advantages of saving reagent dosage costs, simple process flow, and stable and controllable production.

[0108] The ore dressing method for spodumene ore in the present invention effectively improves the recovery rate of spodumene by ingeniously combining a pH adjuster, a collector, and the ion regulation inhibitor of the present invention in the roughing stage, thus improving the overall ore dressing efficiency. Treating the roughing concentrate and the roughing tailings respectively in the cleaning and scavenging stages can more precisely separate the spodumene concentrate and the flotation tailings, optimizing the ore dressing process. The ore dressing method of the present invention only uses the ion regulation inhibitor and the collector of the present invention in the cleaning and scavenging processes, effectively reducing environmental pollution and energy consumption. Moreover, the steps of the ore dressing method are clear, the operation is simple, and it is easy to implement in industrial production, which is beneficial to improving production efficiency and reducing operation costs. It has great popularization and application value in the field of spodumene ore treatment technology.

[0109] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. An ion-regulating inhibitor for preventing mud capping, characterized in that, It includes a starch inhibitor, a sodium salt inhibitor and a metal ion regulator; The starch inhibitor is selected from one or two of aluminum starch octenyl succinate and phosphorylated distarch phosphate; The sodium salt inhibitor is selected from one or two of sodium alginate and sodium gluconate; The metal ion regulator is selected from at least one of ferrous sulfate, zinc sulfate and magnesium sulfate; The ion regulation inhibitor is used for the flotation of lepidolite ore under the premise of not de-sludging.

2. The ion-regulating inhibitor for preventing slime capping according to claim 1, characterized in that, The mass percentages of the starch inhibitor, the sodium salt inhibitor and the metal ion regulator are 20-30%: 50-60%: 10-20%.

3. The application of an ion-regulating inhibitor for preventing mud capping as described in claim 1 or claim 2, characterized in that, Application of the ion regulation inhibitor for preventing ore sludge covering in the beneficiation of lepidolite ore.

4. A beneficiation method for lepidolite ore, characterized in that, It includes the following steps: S1. Pulp making: Adding water to the ore powder of lepidolite ore to make pulp; S2. Rough selection: Adding a pH regulator, a collector and the ion regulation inhibitor described in claim 1 or claim 2 to the pulp for rough selection to obtain a rough selection concentrate and a rough selection tailing; S3. Fine selection and scavenging: Adding the ion regulation inhibitor described in claim 1 or claim 2 to the rough selection concentrate for fine selection to obtain a lepidolite concentrate; Adding a collector to the rough selection tailing for scavenging to obtain a flotation tailing.

5. The ore dressing method according to claim 4, wherein The pH regulator is selected from one or two of calcium oxide and sodium carbonate; The collector is composed of triethanolamine cocoyl alaninate, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate and sodium lauroyl isethionate.

6. The ore dressing method according to claim 5, characterized in that, The mass percentages of triethanolamine cocoyl alaninate, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate and sodium lauroyl isethionate are 20-30%: 20-30%: 10-20%: 20-30%: 10-20%.

7. The ore dressing method according to claim 4, characterized in that, In the rough selection, the addition amount of the pH regulator is 150-200 g / t; In the rough selection, the addition amount of the collector is 300-500 g / t; In the rough selection, the addition amount of the ion regulation inhibitor is 150-250 g / t.

8. The ore dressing method according to claim 4, characterized in that In the first fine selection of the fine selection, the addition amount of the ion regulation inhibitor is 100-150 g / t, and the time of the first fine selection is 1.5-2 min; The number of times of the fine selection is 1-2 times; In the first scavenging of the scavenging, the addition amount of the collector is 150-250 g / t, and the time of the first scavenging is 1-1.5 min; The number of times of the scavenging is 1-3 times, and the scavenging concentrate obtained from the latter scavenging is returned to the previous scavenging, and the scavenging concentrate obtained from the first scavenging is returned to the rough selection; The number of times of the rough selection is 1-2 times; The foaming time of the rough selection is 2-4 min; The foaming time of the fine selection and the scavenging is 1-3 min.

9. The ore dressing method according to claim 4, wherein In the ore powder of the lepidolite ore, the ore powder with a fineness of -0.074 mm accounts for 60-65% of the total amount; The concentration of the ore powder in the pulp is 30-40%.

Images