Ion regulation inhibitor for preventing slime from covering, application and lepidolite ore beneficiation method

Abstract

The invention relates to an ion regulation inhibitor for preventing slurry from covering, application and a lepidolite ore beneficiation method. The invention discloses an ion regulation inhibitor for preventing slime from covering. The ion regulation inhibitor comprises a starch inhibitor, a sodium salt inhibitor and a metal ion regulator. The invention provides application of the ion regulation inhibitor capable of preventing the slime from covering in ore dressing of lepidolite ore. The invention provides a beneficiation method of lepidolite ore. The beneficiation method comprises the following steps: adding water into ore powder of the lepidolite ore to prepare ore pulp; a pH regulator, a collecting agent and the ion regulation inhibitor are added into the ore pulp for roughing, and roughing concentrate and roughing tailings are obtained; the ion regulation inhibitor is added into the roughing concentrate for concentration, and lepidolite concentrate is obtained; and a collecting agent is added into the roughing tailings for scavenging, and flotation tailings are obtained. The problems that an existing lepidolite ore beneficiation method is large in lithium ore loss, low in beneficiation efficiency and complex in process are solved.

Description

Technical Field

[0001] The invention relates to the technical field of lepidolite ore processing, and in particular to an ion regulating inhibitor for preventing ore mud from covering, an application thereof, and a lepidolite ore beneficiation method. 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 my country, high-grade and easy-to-process ore resources are gradually being depleted. Therefore, how to break through the limitations of lithium resource utilization, especially the efficient development of my country's unique poor ore, fine grains and complex symbiotic lithium mica, is particularly important and has broad development prospects.

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

[0004] Based on the physical and chemical properties of lithium ore raw materials, new agents for preventing ore slime and efficient lithium mica flotation processes are studied to avoid the desludging step, thereby achieving a substantial breakthrough in lithium ore extraction technology and realizing efficient recovery of lithium resources, which is of great 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 regulating inhibitor for preventing ore mud covering, its application and a lepidolite beneficiation method, so as to solve the problems of large lithium ore loss, low beneficiation efficiency and complex process in the existing lepidolite beneficiation method.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: An ion regulating inhibitor for preventing mineral mud from covering comprises a starch inhibitor, a sodium salt inhibitor and a metal ion regulator.

[0007] According to the above technical means, by cleverly combining starch inhibitor, sodium salt inhibitor and metal ion regulator as ion regulating inhibitor in lithium ore dressing, the super strong dispersing ability of starch inhibitor is combined with the selective inhibition of sodium salt, and then the competitive adsorption of metal ion regulation and ore mud is effectively dispersed, the activity of ore mud is weakened, and the ore mud is effectively prevented from covering the target mineral, so that the flotation of lithium mica ore is carried out under the premise of not desludging, and the mineral recovery rate and concentrate quality in the dressing process can be improved. The combined use of starch inhibitor, sodium salt inhibitor and metal ion regulator can more accurately adjust the charge and hydrophobicity of the mineral surface and reduce unnecessary waste of reagents. The use of the inhibitor helps to reduce the use of environmentally harmful chemicals and reduce the impact of the dressing process on the environment. The ion regulating inhibitor can stabilize the charge state of the mineral surface, reduce fluctuations during the operation process, and improve the stability of the dressing operation. It has the advantages of saving the cost of reagent dosage, simple process flow and stable and controllable production.

[0008] Preferably, the starch inhibitor is selected from one or both of octenyl succinate aluminum starch and phosphorylated distarch phosphate.

[0009] Preferably, the sodium salt inhibitor is selected from one or both of sodium alginate and sodium gluconate.

[0010] Preferably, the metal ion regulator is selected from ferrous sulfate (FeSO 4 )、ZnSO 4 ) and magnesium sulfate (MgSO 4 ) at least one of the following.

[0011] Preferably, the mass percentages of the starch inhibitor, the sodium salt inhibitor and the metal ion regulator are 20-30%: 50-60%: 10-20%.

[0012] The present invention also provides an application of the ion regulating inhibitor for preventing ore mud covering as described in the present invention in the beneficiation of lepidolite ore.

[0013] The present invention also provides a method for beneficiating lepidolite ore, comprising the following steps: S1. Slurry preparation: adding water to the ore powder of the lithium mica ore to prepare ore slurry; S2, roughing: adding a pH adjuster, a collector and the ion regulating inhibitor of the present invention to the slurry for roughing to obtain a roughing concentrate and a roughing tailing; S3, concentration and scavenging: adding the ion regulating depressant of the present invention to the roughing concentrate for concentration to obtain lepidolite concentrate; adding a collector to the roughing tailings for scavenging to obtain flotation tailings.

[0014] According to the above-mentioned technical means, by skillfully combining the pH adjuster, the collector and the ion regulating inhibitor of the present invention in the roughing stage, the recovery rate of lithium mica is effectively improved, thereby improving the overall mineral processing efficiency. The roughing concentrate and the roughing tailings are treated respectively in the concentrating and scavenging stages, and the lithium mica concentrate and the flotation tailings can be separated more accurately, thereby optimizing the mineral processing process. The mineral processing method of the present invention only uses the ion regulating inhibitor and the collector of the present invention in the concentrating and scavenging processes, effectively reducing environmental pollution and reducing energy consumption. The mineral processing method has clear steps, simple operation, and is easy to implement in industrial production, which is conducive to improving production efficiency and reducing operating costs. Through the concentrating step, a lithium mica concentrate with higher purity can be obtained to meet the requirements of different industrial applications for the quality of lithium mica.

[0015] Preferably, the pH adjuster is selected from calcium oxide (CaO) and sodium carbonate (Na 2 CO 3 ) or both.

[0016] Preferably, the collector consists of cocoyl alanine triethanolamine, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate and sodium lauroyl isethionate.

[0017] Preferably, the mass percentages of cocoyl alanine triethanolamine, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate and sodium lauroyl isethionate are 20%-30%: 20-30%: 10-20%: 20-30%: 10-20%.

[0018] Preferably, the collector consists of 25% of cocoyl alanine triethanolamine, 25% of stearamidopropyl dimethylamine, 20% of coconut amine, 15% of castor oil phosphate and 15% of sodium lauroyl isethionate.

[0019] Preferably, in the rough selection, the amount of pH adjuster added is 150-200 g / t.

[0020] Preferably, in the rough selection, the amount of collector added is 300-500 g / t.

[0021] Preferably, in the rough selection, the amount of ion regulating inhibitor added is 150-250 g / t.

[0022] Preferably, the amount of the ion regulating inhibitor added in the first concentration is 100-150 g / t, and the time of the first concentration is 1.5-2 min.

[0023] Preferably, the number of times of selection is 1 to 2 times.

[0024] Preferably, the amount of collector added in one sweep is 150-250 g / t, and the time of one sweep is 1-1.5 min.

[0025] Preferably, the scavenging is performed 1 to 3 times, the scavenged concentrate obtained in the last scavenging is returned to the previous scavenging, and the scavenged concentrate obtained in the first scavenging is returned to the roughing.

[0026] Preferably, the rough selection is performed 1 to 2 times.

[0027] Preferably, the rough selection scraping time is 2 to 4 minutes.

[0028] Preferably, the scraping time for the selection and sweeping is 1 to 3 minutes.

[0029] Preferably, the mineral powder of the lithium mica ore with a fineness of -0.074 mm accounts for 60-65% of the total amount.

[0030] Preferably, the lithium mica ore includes lithium minerals such as lithium muscovite and ferrolithium mica.

[0031] Preferably, the concentration of the mineral powder in the slurry is 30-40%.

[0032] Beneficial effects of the present invention: The ion regulating inhibitor for preventing the ore from covering with ore mud of the present invention is cleverly combined with starch inhibitor, sodium salt inhibitor and metal ion regulator as ion regulating inhibitor in lithium ore dressing. The super strong dispersibility of starch inhibitor is combined with the selective inhibition of sodium salt, and then the competitive adsorption of metal ion regulation and ore mud is effectively dispersed, the activity of ore mud is weakened, and the ore mud is effectively prevented from covering the target mineral, so that the flotation of lithium mica ore is carried out under the premise of not desludging, and the mineral recovery rate and concentrate quality in the ore dressing process can be improved. The combined use of starch inhibitor, sodium salt inhibitor and metal ion regulator can more accurately adjust the charge and hydrophobicity of the mineral surface and reduce unnecessary waste of reagents. The use of the inhibitor helps to reduce the use of environmentally harmful chemicals and reduce the impact of the ore dressing process on the environment. The ion regulating 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 the cost of reagent dosage, simple process flow and stable and controllable production.

[0033] The mineral processing method of the lithium mica ore of the present invention effectively improves the recovery rate of lithium mica by cleverly combining the pH adjusting agent, the collector and the ion regulating inhibitor of the present invention in the roughing stage, thereby improving the overall mineral processing efficiency. The roughing concentrate and the roughing tailings are processed respectively in the concentration and scavenging stages, so that the lithium mica concentrate and the flotation tailings can be separated more accurately, and the mineral processing process is optimized. The mineral processing method of the present invention only uses the ion regulating inhibitor and the collector of the present invention in the concentration and scavenging process, effectively reducing environmental pollution and reducing energy consumption. The mineral processing method has clear steps, simple operation, and is easy to implement in industrial production, which is conducive to improving production efficiency and reducing operating costs. In the field of lithium mica ore processing technology, it has great promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a flow chart of the mineral processing method of lithium mica ore. DETAILED DESCRIPTION

[0035] The following will describe the embodiments of the present invention with reference to the preferred embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways 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 illustrating the present invention, not for limiting the scope of protection of the present invention.

[0036] The present invention intends to disclose an ion regulating inhibitor for preventing ore mud covering, its application and a lepidolite beneficiation method, so as to solve the problems of large lithium ore loss, low beneficiation efficiency and complex process in the existing lepidolite beneficiation method.

[0037] Among them, an ion regulating inhibitor for preventing mineral mud covering includes a starch inhibitor, a sodium salt inhibitor and a metal ion regulator.

[0038] In some embodiments, the starch inhibitor is selected from one or both of aluminum starch octenylsuccinate and phosphorylated distarch phosphate.

[0039] In some embodiments, the sodium salt inhibitor is selected from one or both of sodium alginate and sodium gluconate.

[0040] In some embodiments, the metal ion regulator is selected from ferrous sulfate (FeSO 4 )、ZnSO 4 ) and magnesium sulfate (MgSO 4 ) at least one of the following.

[0041] 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%.

[0042] In some embodiments, a use of an ion regulating inhibitor for preventing ore slime covering in the beneficiation of lithium mica ore is also provided.

[0043] In some embodiments, a method for beneficiating lithium mica ore is also provided, comprising the following steps: S1. Slurry preparation: adding water to the ore powder of the lithium mica ore to prepare ore slurry; S2, roughing: adding pH adjuster, collector and the above-mentioned ion regulating inhibitor to the slurry for roughing to obtain roughing concentrate and roughing tailings; S3, concentration and scavenging: adding the above-mentioned ion regulating depressant to the roughing concentrate for concentration to obtain lepidolite concentrate; adding a collector to the roughing tailings for scavenging to obtain flotation tailings.

[0044] In some embodiments, the pH adjuster is selected from calcium oxide (CaO) and sodium carbonate (Na 2 CO 3 ) one or both; In some embodiments, the collector consists of triethanolamine cocoyl alanine, stearamidopropyl dimethylamine, cocamine, castor oil phosphate, and sodium lauroyl isethionate.

[0045] In some embodiments, the mass percentages of cocoyl alanine triethanolamine, stearamidopropyl dimethylamine, cocamine, castor oil phosphate and sodium lauroyl isethionate are 20%-30%: 20-30%: 10-20%: 20-30%: 10-20%.

[0046] Exemplarily, the collector consists of 25% cocoyl alanine triethanolamine, 25% stearamidopropyl dimethylamine, 20% coconut amine, 15% castor oil phosphate and 15% sodium lauroyl isethionate.

[0047] In some embodiments, during rough selection, the amount of pH adjuster added is 150-200 g / t.

[0048] In some embodiments, in the rough selection, the amount of collector added is 300-500 g / t.

[0049] In some embodiments, in the rough selection, the amount of ion adjustment inhibitor added is 150-250 g / t.

[0050] In some embodiments, the amount of ion regulating inhibitor added in the first concentration is 100-150 g / t, and the time of the first concentration is 1.5-2 min.

[0051] In some embodiments, the number of selections is 1 to 2 times.

[0052] In some embodiments, the amount of collector added in one sweep is 150-250 g / t, and the time of one sweep is 1-1.5 min.

[0053] In some embodiments, the scavenging is performed 1 to 3 times, the scavenged concentrate obtained from the last scavenging is returned to the previous scavenging, and the scavenged concentrate obtained from the first scavenging is returned to the roughing.

[0054] In some embodiments, the number of rough selections is 1 to 2 times.

[0055] In some embodiments, the rough scraping time is 2 to 4 minutes.

[0056] In some embodiments, the scraping time for fine selection and sweeping selection is 1 to 3 minutes.

[0057] In some embodiments, the mineral powder of the lithium mica ore with a fineness of -0.074 mm accounts for 60-65% of the total amount.

[0058] In some embodiments, the lepidolite ore includes lithium minerals such as lepidolite and lepidolite.

[0059] In some embodiments, the concentration of the mineral powder in the slurry is 30-40%.

[0060] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer, the ion regulating inhibitor for preventing sludge cover and the beneficiation method of lithium mica ore of the present invention will be further described in detail in combination with specific embodiments and drawings. Obviously, the specific embodiments described are only part of the embodiments in the present application, not all of them. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the present application and its application. Based on the specific embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present application.

[0061] If no specific techniques or conditions are specified in the specific embodiments, the techniques or conditions described in the literature in the field or the product instructions are used. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0062] An ion regulating inhibitor for preventing sludge cover, comprising, by mass percentage, 25% of octenyl succinate aluminum starch, 55% of sodium alginate and 20% of ferrous sulfate (FeSO 4 ) and mix well.

[0063] like Figure 1 As shown, a method for beneficiating lithium mica ore comprises the following steps: S1. Pulping: Add water to the ore powder sample of lithium mica ore to make ore pulp; the ore powder sample of lithium mica ore comes from the raw ore of a mineral processing plant in Binjiang Industrial Park, Yichun City. The ore powder with a particle size of -0.074mm accounts for 60% of the total amount. 2 The mass percentage of O is 0.23%~0.25%; the concentration of mineral powder in the slurry is 30%; the mineral powder sample of lithium mica ore is directly added with water to form slurry for flotation process without desludging; S2, roughing: the pulp is transferred to an XFD type 1.5L flotation tank for roughing, and the pH adjusting agent CaO, the ion adjustment inhibitor prepared in Example 1 and the collector are added in sequence for roughing, and each is stirred for 2 minutes before aeration flotation to obtain a roughing concentrate and a roughing tailing; wherein, the amount of the pH adjusting agent is 150g per ton of the flotation lithium mica pulp; the amount of the inhibitor is 200g per ton of the flotation lithium mica pulp; the amount of the collector is 400g per ton of the flotation lithium mica pulp; after stirring, aeration flotation and foaming are carried out to obtain a roughing concentrate and a roughing tailing; the collector is a mixture of 25% cocoyl alanine triethanolamine, 25% stearamidopropyl dimethylamine, 20% coconut amine, 15% castor oil phosphate, and 15% sodium lauroyl isethionate; S3, concentration and scavenging: 100g / t of the ion regulating depressant in Example 1 is added to the roughing concentrate for concentration, and the concentration aeration flotation scraping time is 2min. After one concentration, lithium mica concentrate and middling ore 1 are obtained; a collector with the same composition as that in S2 is added to the roughing tailings for three scavengings, and 200g / t of the collector is added each time. The aeration flotation scraping time for each scavenging is 2min, and the scavenged concentrates are returned in sequence (i.e., the scavenged concentrate obtained in the last scavenging (i.e., Figure 1 The middlings 2, 3 and 4 in the scavenging are returned to the previous scavenging, the scavenging concentrate obtained in the first scavenging is returned to the roughing), and the flotation tailings obtained in the third scavenging are discharged.

[0064] An ion regulating inhibitor for preventing sludge cover, comprising, by mass percentage, 20% phosphorylated distarch phosphate, 60% sodium gluconate, 10% zinc sulfate (ZnSO 4 ) and 10% magnesium sulfate (MgSO 4 ) and mix well.

[0065] like Figure 1 As shown, a method for beneficiating lithium mica ore comprises the following steps: S1. Pulping: Add water to the ore powder sample of lithium mica ore to make ore pulp; the ore powder sample of lithium mica ore comes from a lithium mica ore in Yifeng County, and the ore powder with a particle size of -0.074mm accounts for 65% of the total amount. 2 The mass percentage of O is 0.28%~0.30%; the concentration of mineral powder in the slurry is 35%; the mineral powder sample of lithium mica ore is directly added with water to make slurry for flotation process without desliming; S2, roughing: the pulp is transferred to the XFD type 1.5L flotation tank for roughing, and pH adjusting agent Na is added in sequence in the roughing. 2 CO 3 , the ion adjustment inhibitor and collector prepared in Example 3 are each stirred for 2 minutes and then aerated flotation is started to obtain a roughing concentrate and a roughing tailing; wherein, the amount of the pH adjuster is 180g per ton of the flotation lithium mica pulp; the amount of the inhibitor is 250g per ton of the flotation lithium mica pulp; the amount of the collector is 350g per ton of the flotation lithium mica pulp; after stirring, aeration flotation and foaming are performed to obtain a roughing concentrate and a roughing tailing; the collector is a mixture of 25% cocoyl alanine triethanolamine, 25% stearamidopropyl dimethylamine, 20% coconut amine, 15% castor oil phosphate, and 15% sodium lauroyl isethionate; S3, concentration and scavenging: 150g / t of the ion regulating depressant in Example 3 is added to the roughing concentrate for concentration, and the concentration aeration flotation scraping time is 3min. After one concentration, lithium mica concentrate and middling ore 1 are obtained; a collector with the same composition as that in S2 is added to the roughing tailings for three scavengings, and the collector added in each scavenging is 180g / t, and the aeration flotation scraping time in each scavenging is 3min. The scavenged concentrates are returned in sequence (i.e., the scavenged concentrate obtained in the last scavenging (i.e., Figure 1 The middlings 2, 3 and 4 in the scavenging are returned to the previous scavenging, the scavenging concentrate obtained in the first scavenging is returned to the roughing), and the flotation tailings obtained in the third scavenging are discharged.

[0066] Comparative Example 1 A method for beneficiating lithium mica ore comprises the following steps: S1. Pulping: Add water to the ore powder sample of lithium mica ore to make ore pulp; the ore powder sample of lithium mica ore comes from the raw ore of a mineral processing plant in Binjiang Industrial Park, Yichun City. The ore powder with a particle size of -0.074mm accounts for 60% of the total amount. 2 The mass percentage of O is 0.23%~0.25%; the concentration of mineral powder in the slurry is 30%; the mineral powder sample of lithium mica ore is directly added with water to form slurry for flotation process without desludging; S2, roughing: the pulp is transferred to an XFD type 1.5L flotation tank for roughing, and pH adjuster CaO, inhibitor and collector are added in sequence for roughing, and aeration flotation is started after stirring for 2 minutes to obtain a roughing concentrate and a roughing tailing; wherein, the amount of pH adjuster is 150g per ton of flotation lithium mica pulp; the amount of inhibitor is 200g per ton of flotation lithium mica pulp; the amount of collector is 400g per ton of flotation lithium mica pulp; after stirring, aeration flotation and foaming are carried out to obtain a roughing concentrate and a roughing tailing; the inhibitor is a mixture of sodium hexametaphosphate and sodium carbonate in a mass ratio of 2:1; the collector is a mixture of oxidized paraffin soap and dodecylamine in a mass ratio of 3:1; S3, concentration and scavenging: add 100g / t of the same depressant as in S2 to the rougher concentrate for concentration, the aeration flotation scraping time for concentration is 2min, and the lithium mica concentrate is obtained after one concentration; add the same collector as in S2 to the rougher tailings for three scavengings, 200g / t of collector is added each time, the aeration flotation scraping time for each scavenging is 2min, the scavenged concentrates are returned sequentially (i.e. the scavenged concentrate obtained from the last scavenging is returned to the previous scavenging, and the scavenged concentrate obtained from the first scavenging is returned to the rougher), and the flotation tailings obtained from the third scavenging are discharged.

[0067] Comparative Example 2 A method for beneficiating lithium mica ore comprises the following steps: S1. Pulping: Add water to the ore powder sample of lithium mica ore to make ore pulp; the ore powder sample of lithium mica ore comes from a lithium mica ore in Yifeng County, and the ore powder with a particle size of -0.074mm accounts for 65% of the total amount. 2 The mass percentage of O is 0.28%~0.30%; the concentration of mineral powder in the slurry is 35%; the mineral powder sample of lithium mica ore is directly added with water to make slurry for flotation process without desliming; S2, roughing: the pulp is transferred to an XFD type 1.5L flotation tank for roughing, and pH adjusting agent CaO, inhibitor and collector are added in sequence for roughing, and aeration flotation is started after stirring for 2 minutes to obtain a roughing concentrate and a roughing tailing; wherein, the amount of pH adjusting agent is 180g per ton of flotation lithium mica pulp; the amount of inhibitor is 250g per ton of flotation lithium mica pulp; the amount of collector is 350g per ton of flotation lithium mica pulp; after stirring, aeration flotation and foaming are carried out to obtain a roughing concentrate and a roughing tailing; the inhibitor is a mixture of sodium hexametaphosphate and sodium hydroxide in a mass ratio of 3:1; the collector is a mixture of sodium dodecyl sulfonate and octadecylamine in a mass ratio of 2:1; S3, concentration and scavenging: add 150g / t of the same depressant as in S2 to the rougher concentrate for concentration, the concentration aeration flotation scraping time is 3min, and the lithium mica concentrate and the middling ore 1 are obtained after one concentration; add the same collector as in S2 to the rougher tailings for three scavenging, the collector added each time is 180g / t, the aeration flotation scraping time for each scavenging is 3min, and the scavenged concentrates are returned in sequence (i.e. the scavenged concentrate obtained in the last scavenging (i.e. Figure 1 The middlings 2, 3 and 4 in the scavenging are returned to the previous scavenging, the scavenging concentrate obtained in the first scavenging is returned to the roughing), and the flotation tailings obtained in the third scavenging are discharged.

[0068] Comparative Example 3 A method for beneficiating lithium mica ore comprises the following steps: S1. Pulping: Add water to the ore powder sample of lithium mica ore to make ore pulp; the ore powder sample of lithium mica ore comes from a lithium mica ore in Yifeng County, and the ore powder with a particle size of -0.074mm accounts for 65% of the total amount. 2 The mass percentage of O is 0.28%~0.30%; S2, pre-de-sludge: Use a 250 hydrocyclone to pre-de-sludge the slurry prepared in S1 (stirring and de-sludge) for 35 minutes to obtain de-sludged slurry and pre-treat the de-sludged slurry; S3, roughing: the desludging pulp is transferred to an XFD type 1.5L flotation tank for roughing, and pH adjusting agent CaO, inhibitor and collector are added in sequence for roughing, and aeration flotation is started after stirring for 2 minutes to obtain a roughing concentrate and a roughing tailing; wherein, the amount of pH adjusting agent is 180g per ton of flotation lithium mica pulp; the amount of inhibitor is 250g per ton of flotation lithium mica pulp; the amount of collector is 350g per ton of flotation lithium mica pulp; after stirring, aeration flotation and foaming are carried out to obtain a roughing concentrate and a roughing tailing; the inhibitor is a mixture of sodium hexametaphosphate and sodium hydroxide in a mass ratio of 3:1; the collector is a mixture of sodium dodecyl sulfonate and octadecylamine in a mass ratio of 2:1; S4, concentration and scavenging: add 150g / t of the same depressant as in S3 to the rougher concentrate for concentration, the concentration aeration flotation scraping time is 3min, and the lithium mica concentrate is obtained after one concentration; add the same collector as in S3 to the rougher tailings for three scavengings, 180g / t of collector is added each time, the aeration flotation scraping time is 3min, the scavenging concentrates are returned in sequence (i.e. the scavenging concentrate obtained from the last scavenging is returned to the previous scavenging, and the scavenging concentrate obtained from the first scavenging is returned to the rougher), and the flotation tailings obtained from the third scavenging are discharged.

[0069] Detection and analysis The lithium mica concentrate obtained after the first concentration in Example 1 and Example 2, and Comparative Examples 1 to Comparative Examples 3, the pre-treated ore slime, the scavenged ore and the flotation tailings obtained by tertiary scavenging were tested and analyzed, and the results are shown in Table 1.

[0070] The calculation method of yield is: yield = (concentrate mass / ore mass) × 100% Li 2 The O content was measured by atomic absorption spectrophotometry (AAS).

[0071] Li 2 The recovery rate of O is calculated as follows: Recovery rate = [(product yield × product grade) / ore grade] × 100% Table 1 shows the test results of lithium mica concentrate, pre-treated ore slime, scavenged ore and flotation tailings obtained by three scavengings. It can be seen from the results in Table 1 that the lithium oxide recovery rate of the lithium mica concentrate and the scavenged ore obtained by the flotation method of Examples 2 and 4 of the present invention without pre-desliming treatment can reach more than 85% in total, and the grade of the obtained lithium mica concentrate is significantly higher than that of Control Examples 1-2; the grade of lithium oxide in the tailings is lower than that of Control Examples 1-2; Control Examples 1-2 use conventional inhibitors for flotation of lithium mica ore, and due to its low dispersion performance, the grade and recovery rate of the final product lithium mica concentrate are significantly lower than those of Examples 2 and 4.

[0072] Comparative Example 3 adopts the currently more conventional and commonly used lithium mica ore desludging flotation process, firstly stirs and desludging the slurry for pretreatment, and then adds inhibitors and collectors for flotation. Although the grade of the lithium mica concentrate is improved to a certain extent, the final recovery rate of lithium oxide is low. This is because the 250 cyclone desludging pretreatment process will cause about 20% of the lithium oxide concentrate to be removed together, thereby causing a large waste of lithium resources, affecting the final recovery rate of lithium oxide in the flotation concentrate, and increasing the desludging process processing time and cost.

[0073] Therefore, the lithium grade in the lepidolite concentrate obtained by direct flotation without pre-desliming treatment according to the flotation method of the present invention is significantly improved, and the lithium grade in the flotation tailings is significantly reduced.

[0074] In summary, the ion regulating inhibitor for preventing ore mud from covering the present invention, by cleverly combining starch inhibitor, sodium salt inhibitor and metal ion regulator as ion regulating inhibitor in lithium ore beneficiation, effectively prevents the phenomenon of ore mud covering the target mineral, thereby flotation of lithium mica ore is carried out under the premise of not desludging, and can improve the mineral recovery rate and concentrate quality in the beneficiation process. The combined use of starch inhibitor, sodium salt inhibitor and metal ion regulator can more accurately adjust the charge and hydrophobicity of the mineral surface and reduce unnecessary waste of reagents. The use of this inhibitor helps to reduce the use of environmentally harmful chemicals and reduce the impact of the beneficiation process on the environment. The ion regulating inhibitor can stabilize the charge state of the mineral surface, reduce fluctuations during operation, and improve the stability of the beneficiation operation. It has the advantages of saving the cost of reagent dosage, simple process flow and stable and controllable production.

[0075] The mineral processing method of the lithium mica ore of the present invention effectively improves the recovery rate of lithium mica by cleverly combining the pH adjusting agent, the collector and the ion regulating inhibitor of the present invention in the roughing stage, thereby improving the overall mineral processing efficiency. The roughing concentrate and the roughing tailings are processed respectively in the concentration and scavenging stages, so that the lithium mica concentrate and the flotation tailings can be separated more accurately, and the mineral processing process is optimized. The mineral processing method of the present invention only uses the ion regulating inhibitor and the collector of the present invention in the concentration and scavenging process, effectively reducing environmental pollution and reducing energy consumption. The mineral processing method has clear steps, simple operation, and is easy to implement in industrial production, which is conducive to improving production efficiency and reducing operating costs. In the field of lithium mica ore processing technology, it has great promotion and application value.

[0076] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. An ion regulating inhibitor for preventing sludge covering, characterized in that: Including starch inhibitors, sodium salt inhibitors and metal ion regulators.

2. The ion regulating inhibitor for preventing sludge cover according to claim 1, characterized in that: The starch inhibitor is selected from one or both of octenyl succinate aluminum starch and phosphorylated distarch phosphate; And / or, the sodium salt inhibitor is selected from one or both of sodium alginate and sodium gluconate; And / or, the metal ion regulator is selected from at least one of ferrous sulfate (FeSO4), zinc sulfate (ZnSO4) and magnesium sulfate (MgSO4).

3. The ion regulating inhibitor for preventing sludge cover 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%.

4. An application of an ion regulating inhibitor for preventing sludge covering according to any one of claims 1 to 3, characterized in that: The application of the ion regulating inhibitor for preventing ore mud covering in the beneficiation of lepidolite ore.

5. A method for beneficiating lepidolite ore, characterized in that: The following steps are involved: S1. Slurry preparation: adding water to the ore powder of the lithium mica ore to prepare ore slurry; S2, roughing: adding a pH adjuster, a collector and an ion regulating depressant according to any one of claims 1 to 3 to the ore pulp for roughing to obtain a roughing concentrate and a roughing tailing; S3, concentration and scavenging: adding the ion regulating depressant described in any one of claims 1 to 3 to the roughing concentrate for concentration to obtain lepidolite concentrate; adding a collector to the roughing tailings for scavenging to obtain flotation tailings.

6. The ore dressing method according to claim 5, characterized in that: The pH adjuster is selected from one or both of calcium oxide (CaO) and sodium carbonate (Na2CO3); And / or, the collector consists of cocoyl alanine triethanolamine, stearamidopropyl dimethylamine, coconut amine, castor oil phosphate and sodium lauroyl isethionate.

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

8. The ore dressing method according to claim 5, characterized in that: In the rough selection, the amount of pH adjuster added is 150-200 g / t; And / or, in the rough selection, the amount of collector added is 300-500 g / t; And / or, in the rough selection, the amount of ion adjustment inhibitor added is 150-250 g / t.

9. The ore dressing method according to claim 5, characterized in that: The amount of ion regulating inhibitor added in the first concentration is 100-150 g / t, and the time of the first concentration is 1.5-2 min; And / or, the number of times of selection is 1 to 2 times; And / or, the amount of collector added in the sweeping is 150-250 g / t, and the sweeping time is 1-1.5 min; And / or, the scavenging is performed 1 to 3 times, the scavenged concentrate obtained in the last scavenging is returned to the previous scavenging, and the scavenged concentrate obtained in the first scavenging is returned to the roughing; And / or, the rough selection is performed 1 to 2 times; And / or, the scraping time of the rough selection is 2 to 4 minutes; And / or, the scraping time of the selection and sweeping is 1 to 3 minutes.

10. The ore dressing method according to claim 5, characterized in that: The mineral powder of the lithium mica ore with a fineness of -0.074mm accounts for 60-65% of the total amount; And / or, the concentration of mineral powder in the slurry is 30-40%.

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