Lithium mica flotation collector and preparation method thereof

Abstract

The present application relates to a kind of lithium mica flotation collector and its preparation method, the lithium mica flotation collector includes: sodium salt of n-butyl oleate sulfate, coconut amine, carboxylic acid, solvent alcohol and methyl isobutyl carbinol.The lithium mica flotation collector provided by the present application utilizes the synergistic effect of sodium salt of n-butyl oleate sulfate, coconut amine, carboxylic acid, solvent alcohol and methyl isobutyl carbinol, improves the solubility and dispersibility of the flotation collector, which is beneficial to the dispersion of the flotation collector in the ore pulp and the adsorption on the surface of lithium mica, thereby improving the grade and recovery rate of lithium mica concentrate;It has the characteristics of easy solubility in water, good dispersibility and solubility, etc., and can be directly added in the flotation operation when used, without adding hydrochloric acid configuration, good operating environment;The dosage (200-800 g / t) can achieve good separation effect.

Description

Technical Field

[0001] This invention relates to the field of mineral processing technology, specifically to a lithium mica flotation collector and its preparation method. Background Technology

[0002] Currently, lepidolite is one of the most important resources for lithium extraction. Lepidolite beneficiation mainly employs flotation, with amine cationic collector flotation being the most widely used and offering the most stable performance.

[0003] CN111229470A discloses a mineral processing activator for lepidolite flotation, comprising the following raw materials and their weight proportions: 60% mineral processing activator, 30% collector, and 10% frother. In this lepidolite flotation process, the mineral processing activator is prepared by first adding dodecylamine or cocoylamine to a heated reactor. After the dodecylamine or cocoylamine dissolves upon heating, alcohol is added and stirred until homogeneous. Then, hydrochloric acid is added to initiate the reaction. After the reaction is complete, hot water is added to dilute the solution for later use, thus preparing the collector.

[0004] However, the above-mentioned amine cationic collectors have obvious drawbacks. First, amines require the addition of a large amount of hydrochloric acid during preparation and use. Hydrochloric acid is highly volatile and corrosive, and there are significant safety hazards in the storage, preparation, use and management of hydrochloric acid. Second, amine collectors have high freezing points and are needed at low temperatures. They still have problems such as poor solubility and selectivity, large reagent dosage and low flotation recovery rate.

[0005] Therefore, there is an urgent need for a highly efficient collector with a favorable operating environment to solve the problems of amine collectors, such as the need to add large amounts of hydrochloric acid, poor solubility, and poor selectivity. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a lithium mica flotation collector and its preparation method, so as to solve the problems of needing to add a large amount of hydrochloric acid, poor solubility, poor selectivity and low flotation recovery rate in the current lithium mica flotation.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a lepidolite flotation collector comprising: sodium oleate n-butyl sulfate, cocoamine, carboxylic acid, solvent alcohol, and methyl isobutyl methanol.

[0009] The lepidolite flotation collector provided by this invention utilizes the synergistic effect of sodium oleate n-butyl sulfate, coconut oil amine, carboxylic acid, solvent alcohol, and methyl isobutyl methanol to improve the solubility and dispersibility of the flotation collector. This facilitates the dispersion of the flotation collector in the slurry and its adsorption on the surface of lepidolite, thereby improving the grade and recovery rate of lepidolite concentrate. Furthermore, it is easily soluble in water, has good dispersibility and solubility, and can be directly added to the flotation process without the need for hydrochloric acid preparation. This results in a favorable operating environment, and a dosage of 200-800 g / t is sufficient to achieve good separation effects.

[0010] In this invention, g / t refers to the amount of 200-800g of lepidolite flotation collector added per ton of raw ore to be processed.

[0011] As a preferred embodiment of the present invention, the lithium mica flotation collector comprises, by weight, 15-30 parts of sodium oleate n-butyl sulfate, 5-10 parts of coconut oil amine, 7-15 parts of carboxylic acid, 4-8 parts of solvent alcohol, and 2-6 parts of methyl isobutyl methanol.

[0012] As a preferred embodiment of the present invention, the carboxylic acid includes one or a combination of at least two of formic acid, glacial acetic acid, or propionic acid.

[0013] As a preferred technical solution of the present invention, the solvent alcohol includes one or a combination of at least two of methanol, ethanol, n-propanol or isopropanol.

[0014] In a second aspect, the present invention provides a method for preparing a lithium mica flotation collector as described in the first aspect, the method comprising:

[0015] According to the formula, coconut oil amine and carboxylic acid are mixed in the first step to obtain the first liquid;

[0016] A second mixture of sodium oleate n-butyl sulfate, solvent alcohol, and methyl isobutyl methanol is obtained to produce a second solution.

[0017] The first and second liquids are then mixed in a third step to obtain a lithium mica flotation collector.

[0018] As a preferred technical solution of the present invention, the temperature of the first mixing is 25-30℃.

[0019] Preferably, the first mixing time is 0.5-1h.

[0020] As a preferred embodiment of the present invention, the temperature of the second mixing is 20-30°C.

[0021] As a preferred embodiment of the present invention, the second mixing time is 0.5-1h.

[0022] As a preferred embodiment of the present invention, the temperature of the third mixing step is 25-30°C.

[0023] As a preferred embodiment of the present invention, the third mixing time is 0.5-1h.

[0024] Compared with existing technical solutions, the present invention has the following beneficial effects:

[0025] (1) The flotation collector described in this invention does not require the addition of hydrochloric acid during preparation and can be directly added to the flotation operation, resulting in a good operating environment. It overcomes the drawbacks of traditional amine collectors, such as the high volatility and corrosiveness, as well as the significant safety hazards in storage, preparation, use and management caused by the need to use a large amount of hydrochloric acid for preparation.

[0026] (2) The flotation collector described in this invention fully utilizes the synergistic effect of sodium oleate sulfate, coconut oil amine, carboxylic acid, solvent alcohol and methyl isobutyl methanol, and uses the synergistic effect of anionic and cationic collectors to separate lepidolite. The collector is fixed on the surface of lepidolite in the form of chemical adsorption, while the interaction with quartz and feldspar is very weak. Therefore, it can achieve a very good flotation effect, high flotation efficiency, and high grade and recovery rate of lepidolite concentrate.

[0027] (3) The flotation collector described in this invention is easily soluble in water, has good solubility and dispersibility, and can significantly reduce the amount of flotation collector used, thereby achieving a better separation effect. Detailed Implementation

[0028] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0029] This embodiment provides a lepidolite flotation collector, which includes: sodium oleate n-butyl sulfate, coconut oil amine, carboxylic acid, solvent alcohol, and methyl isobutyl methanol.

[0030] Specifically, the lithium mica flotation collector comprises, by weight, 15-30 parts of sodium oleate n-butyl sulfate, 5-10 parts of coconut oil amine, 7-15 parts of carboxylic acid, 4-8 parts of solvent alcohol, and 2-6 parts of methyl isobutyl methanol.

[0031] The sodium oleate n-butyl sulfate in the lithium mica flotation collector is 15-30 parts by weight, for example, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30 parts, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0032] The lepidolite flotation collector contains 5-10 parts by weight of coconut oil amine, for example, 5, 6, 7, 8, 9 or 10 parts, but is not limited to the listed values. Values ​​not listed within this range are also acceptable.

[0033] The carboxylic acid in the lithium mica flotation collector is 7-15 parts by weight, for example, 7, 8, 9, 10, 11, 12, 13, 14 or 15 parts, but not limited to the listed values. Values ​​not listed in this range are also acceptable.

[0034] The solvent alcohol in the lepidolite flotation collector is 4-8 parts by weight, for example, 4, 5, 6, 7 or 8 parts, but not limited to the listed values. Values ​​not listed in this range are also acceptable.

[0035] The methyl isobutyl methanol in the lithium mica flotation collector is 2-6 parts by weight, for example, 2 parts, 3 parts, 4 parts, 5 parts or 6 parts, but not limited to the listed values. Values ​​not listed in this range are also acceptable.

[0036] In this invention, the flotation collector contains 15-30 parts of sodium oleate n-butyl sulfate. If less than 15 parts, the content of anionic collector in the collector decreases, leading to a decrease in selectivity and concentrate grade; if more than 30 parts, the content of anionic collector is high, resulting in a decrease in collecting capacity and recovery rate. The flotation collector also contains 5-10 parts of coconut oil amine. If less than 5 parts, the amine content in the collector decreases, leading to a decrease in collecting capacity; if more than 10 parts, the amine content is high, resulting in poor solubility and dispersibility of the collector and a decrease in flotation indicators. The flotation collector also contains carboxylic acid. 7-15 parts; if less than 7 parts, the solubility of amines in the collector decreases, which is not conducive to flotation; if more than 15 parts, the carboxylic acid is excessive and easily volatilizes; 4-8 parts of solvent alcohol in the flotation collector; if less than 4 parts, the solubility of the collector decreases, affecting the flotation recovery rate; if more than 8 parts, the content of other components in the collector decreases, leading to a decrease in collecting capacity; 2-6 parts of methyl isobutyl methanol in the flotation collector; if less than 2 parts, the froth layer is thin during flotation, affecting the flotation recovery rate; if more than 6 parts, the froth layer is thick, affecting the concentrate grade.

[0037] By employing an appropriate sodium oleate sulfate, the introduction of a highly hydrophilic sulfonic acid group into the fatty acid chain makes water-insoluble oils soluble, while also significantly improving solubility in hard water. Carboxylic acids ensure the selective adsorption of cocoamine on the surface of lepidolite, further enhancing both collecting capacity and selectivity. Solvent alcohols are excellent solvents, promoting the dissolution of organic components in the collector and improving its water solubility and dispersibility, thus achieving selective adsorption on the lepidolite surface. Methyl isobutyl methanol, in combination with sodium oleate sulfate and cocoamine, regulates the foam state, further facilitating the flotation of lepidolite.

[0038] Specifically, the carboxylic acids used include one or a combination of at least two of formic acid, glacial acetic acid, or propionic acid.

[0039] Specifically, the solvent alcohol includes one or a combination of at least two of methanol, ethanol, n-propanol or isopropanol.

[0040] Furthermore, the present invention also provides a method for preparing the aforementioned lithium mica flotation collector, comprising:

[0041] According to the formula, coconut oil amine and carboxylic acid are mixed in the first step to obtain the first liquid;

[0042] A second mixture of sodium oleate n-butyl sulfate, solvent alcohol, and methyl isobutyl methanol is obtained to produce a second solution.

[0043] The first and second liquids are then mixed in a third step to obtain a lithium mica flotation collector.

[0044] In order to ensure the mixing effect of the first mixture, the coconut oil amine can be melted into a liquid phase before the first mixture and then mixed with the carboxylic acid, or auxiliary heating can be carried out in the first mixture to improve the mixing effect.

[0045] Specifically, the temperature of the first mixture is 25-30°C, for example, it can be 25°C, 26°C, 27°C, 28°C, 29°C or 30°C, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0046] Specifically, the first mixing time is 0.5-1h, for example, it can be 0.5h, 0.6h, 0.7h, 0.8h, 0.9h or 1h, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0047] Specifically, the temperature of the second mixture is 20-30°C, for example, it can be 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C or 30°C, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0048] Specifically, the second mixing time is 0.5-1h, for example, it can be 0.5h, 0.6h, 0.7h, 0.8h, 0.9h or 1h, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0049] Specifically, the temperature of the third mixture is 25-30°C, for example, it can be 25°C, 26°C, 27°C, 28°C, 29°C or 30°C, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0050] Specifically, the third mixing time is 0.5-1h, for example, it can be 0.5h, 0.6h, 0.7h, 0.8h, 0.9h, 1h, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0051] To further illustrate the performance of the lithium mica flotation collector provided by the present invention, the following specific examples are provided:

[0052] Example 1

[0053] This embodiment provides a lepidolite flotation collector and its preparation method. The lepidolite flotation collector, by weight, consists of: 26 parts of sodium oleate n-butyl sulfate, 7 parts of coconut oil amine, 10 parts of glacial acetic acid, 6 parts of ethanol, and 5 parts of methyl isobutyl methanol.

[0054] The preparation method includes the following steps:

[0055] (1) After heating coconut oil amine until it melts, it is mixed with glacial acetic acid at 27°C for 0.5 h to obtain the first solution;

[0056] (2) Sodium oleate sulfate, ethanol and methyl isobutyl methanol were mixed at 27°C for 0.5 h to obtain the second solution;

[0057] (3) Add the second liquid from step (2) to the first liquid from step (1) and mix at 27°C for 0.5 h to obtain a lithium mica flotation collector.

[0058] Example 2

[0059] This embodiment provides a lepidolite flotation collector and its preparation method. The lepidolite flotation collector, by weight, consists of: 24 parts of sodium oleate n-butyl sulfate, 6 parts of coconut oil amine, 9 parts of glacial acetic acid, 7 parts of methanol, and 4 parts of methyl isobutyl methanol.

[0060] The preparation method includes the following steps:

[0061] (1) After heating the coconut oil amine until it melts, it is mixed with glacial acetic acid at 30°C for 1 hour to obtain the first solution;

[0062] (2) Sodium oleate sulfate, ethanol and methyl isobutyl methanol were mixed at 30°C for 1 h to obtain the second liquid;

[0063] (3) Add the second liquid from step (2) to the first liquid from step (1) and mix at 30°C for 1 hour to obtain the lithium mica flotation collector.

[0064] Example 3

[0065] This embodiment provides a lepidolite flotation collector and its preparation method. The lepidolite flotation collector is composed of the following components by weight: 20 parts of sodium oleate n-butyl sulfate, 5 parts of coconut oil amine, 8 parts of propionic acid, 6 parts of n-propanol, and 4 parts of methyl isobutyl methanol.

[0066] The preparation method includes the following steps:

[0067] (1) After heating the coconut oil amine until it melts, it is mixed with glacial acetic acid at 25°C for 1 hour to obtain the first solution;

[0068] (2) Sodium oleate sulfate, ethanol and methyl isobutyl methanol were mixed at 25°C for 1 h to obtain the second solution;

[0069] (3) Add the second liquid from step (2) to the first liquid from step (1) and mix at 25°C for 1 hour to obtain the lithium mica flotation collector.

[0070] Example 4

[0071] This embodiment provides a lepidolite flotation collector and its preparation method. Referring to the lepidolite flotation collector described in Example 1, the lepidolite flotation collector is composed of the following components by weight: 26 parts of sodium oleate n-butyl sulfate, 8 parts of coconut oil amine, 14 parts of glacial acetic acid, 6 parts of ethanol, and 3 parts of methyl isobutyl methanol. The preparation method is the same as that in Example 1.

[0072] Example 5

[0073] This embodiment provides a lepidolite flotation collector and its preparation method. Referring to the lepidolite flotation collector described in Example 1, the lepidolite flotation collector is composed of the following components by weight: 27 parts of sodium oleate n-butyl sulfate, 9 parts of coconut oil amine, 15 parts of glacial acetic acid, 5 parts of ethanol, and 3 parts of methyl isobutyl methanol. The preparation method is the same as that in Example 1.

[0074] Example 6

[0075] This embodiment provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, the sodium oleate n-butyl sulfate is 5 parts, and the other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0076] Example 7

[0077] This embodiment provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, the sodium oleate n-butyl sulfate is 40 parts, and the other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0078] Example 8

[0079] This embodiment provides a lithium mica flotation collector and its preparation method, which is the same as the lithium mica flotation collector described in Example 1, except that: the total amount of sodium oleate sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, cocoamine is 2 parts, and the other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0080] Example 9

[0081] This embodiment provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that: the total amount of sodium oleate sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, cocoamine is 15 parts, and other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0082] Example 10

[0083] This embodiment provides a lithium mica flotation collector and its preparation method, which is the same as the lithium mica flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, glacial acetic acid is 2 parts, and other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0084] Example 11

[0085] This embodiment provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, the amount of glacial acetic acid is 25 parts, and the other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0086] Example 12

[0087] This embodiment provides a lithium mica flotation collector and its preparation method, which is the same as the lithium mica flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, coconut oil amine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, ethanol is 1 part, and the other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0088] Example 13

[0089] This embodiment provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, the amount of ethanol is 15 parts, and the other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0090] Example 14

[0091] This embodiment provides a lithium mica flotation collector and its preparation method, which is the same as the lithium mica flotation collector described in Example 1, except that: the total amount of sodium oleate n-butyl sulfate, cocoamine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, methyl isobutyl methanol is 1 part, and other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0092] Example 15

[0093] This embodiment provides a lithium mica flotation collector and its preparation method, which is the same as the lithium mica flotation collector described in Example 1, except that: the total amount of sodium oleate sulfate, coconut oil amine, glacial acetic acid, ethanol, and methyl isobutyl methanol remains unchanged, methyl isobutyl methanol is 15 parts, and other components are adjusted according to the original proportions; the preparation method is the same as the preparation method in Example 1.

[0094] Comparative Example 1

[0095] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that sodium oleate sulfate is not added.

[0096] Comparative Example 2

[0097] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that no coconut oil amine is added.

[0098] Comparative Example 3

[0099] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that glacial acetic acid is not added.

[0100] Comparative Example 4

[0101] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that methyl isobutyl methanol is not added.

[0102] Comparative Example 5

[0103] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that ethanol is not added.

[0104] Comparative Example 6

[0105] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that glacial acetic acid is replaced with an equal amount of hydrochloric acid.

[0106] Comparative Example 7

[0107] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that sodium oleate sulfate is replaced with an equal amount of oleic acid.

[0108] Comparative Example 8

[0109] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that coconut oil amine is replaced with an equal amount of dodecylamine; the preparation method is the same as the preparation method in Example 1.

[0110] Comparative Example 9

[0111] This comparative example provides a lepidolite flotation collector and its preparation method, which is the same as the lepidolite flotation collector described in Example 1, except that methyl isobutyl methanol is replaced with an equal amount of No. 2 oil.

[0112] The No. 2 oil used in this comparative example was purchased from Beikuang Chemical Technology (Cangzhou) Co., Ltd.

[0113] The flotation performance of the flotation collectors obtained in the above embodiments and comparative examples was evaluated, and the specific steps included the following:

[0114] 1) The deslimed lepidolite feed (Li2O content 1.18%) is mixed with water to prepare a slurry with a solid content of 30-35%, which is selected in this example as 32%. Sodium carbonate is added to adjust the pH of the slurry to 8-10, which is controlled at 9 in this example. Flotation collector is added to obtain concentrate. Based on the lepidolite feed, the amount of flotation collector added is controlled to be 200-800g / t, which is selected in this example as 350g / t.

[0115] 2) The Li2O content and Li2O recovery rate in the concentrate were detected and calculated using the following methods:

[0116] Li2O content in lepidolite concentrate: tested using the method specified in industry standard YS / T 509.1-2008;

[0117] Li2O recovery rate = (Li2O content in lepidolite concentrate × lepidolite concentrate yield) / (Li2O content in lepidolite feed × lepidolite feed yield) × 100%;

[0118] The flotation results are detailed in Table 1.

[0119] Table 1

[0120]

[0121]

[0122] Based on the results in Table 1, the analysis shows that:

[0123] (1) As can be seen from Examples 1-5, the flotation collector of the present invention fully utilizes the synergistic effect of sodium oleate n-butyl sulfate, coconut oil amine, glacial acetic acid, ethanol and methyl isobutyl methanol, which is conducive to the dispersion of the flotation collector in the slurry and adsorption on the surface of lithium mica, resulting in high Li2O content and high Li2O recovery rate in the concentrate.

[0124] (2) Comparing Example 1 with Examples 6-15, it can be seen that in Example 6, the sodium oleate sulfate content is 5 parts, which is lower than the preferred 15-30 parts of the present invention, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate; in Example 7, the sodium oleate sulfate content is 40 parts, which exceeds the preferred 15-30 parts of the present invention, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate; in Example 8, the cocoamine content is 2 parts, which is lower than the preferred 5-10 parts of the present invention, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate; in Example 9, the cocoamine content is 15 parts, which exceeds the preferred 5-10 parts of the present invention, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate; in Example 10, the glacial acetic acid content is 2 parts, which is lower than the preferred 7-15 parts of the present invention, resulting in a decrease in the solubility of the flotation collector, a decrease in Li2O content and Li2O recovery rate in the concentrate; in Example 11, the glacial acetic acid content is 2 parts, which is lower than the preferred 7-15 parts of the present invention, resulting in a decrease in the solubility of the flotation collector, a decrease in the Li2O content and Li2O recovery rate in the concentrate; Acetic acid was 25 parts, exceeding the preferred amount of 7-15 parts in this invention. The content of other components decreased, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate. In Example 12, ethanol was 1 part, lower than the preferred amount of 4-8 parts in this invention. The flotation foam layer was thin, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate. In Example 13, ethanol was 15 parts, exceeding the preferred amount of 4-8 parts in this invention. The content of other components decreased, and the foam was sticky, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate. In Example 14, methyl isobutyl methanol was 1 part, lower than the preferred amount of 2-6 parts in this invention. It was difficult to exert a synergistic effect with other components, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate. In Example 15, methyl isobutyl methanol was 15 parts, exceeding the preferred amount of 2-6 parts in this invention. The content of other components decreased, resulting in a decrease in Li2O content and Li2O recovery rate in the concentrate.

[0125] (3) Comparing Example 1 with Comparative Examples 1-5, it can be seen that the collector in Comparative Example 1 does not contain sodium oleate n-butyl sulfate, which leads to a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate; the collector in Comparative Example 2 does not contain cocoa amine, which leads to a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate; Comparative Example 3 does not contain glacial acetic acid, which leads to a decrease in the solubility and dispersibility of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate; Comparative Example 4 does not contain methyl isobutyl methanol, which leads to a thin flotation foam layer, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate; Comparative Example 5 does not contain ethanol, which leads to a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate.

[0126] (4) Comparing Example 1 with Comparative Examples 6-9, it can be seen that in Comparative Example 6, glacial acetic acid was replaced with hydrochloric acid in an equal amount. Hydrochloric acid reacts with coconut oil amine to easily form a complex, which reduces the solubility and dispersibility, resulting in a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate. In Comparative Example 7, oleic acid was replaced with sodium oleate sulfate in an equal amount, resulting in a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate. In Comparative Example 8, coconut oil amine was replaced with dodecylamine in an equal amount, resulting in a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate. In Comparative Example 9, methyl isobutyl methanol was replaced with No. 2 oil in an equal amount, resulting in a decrease in the performance of the flotation collector, a decrease in the Li2O content in the concentrate, and a decrease in the Li2O recovery rate.

[0127] The present invention is described in detail through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0128] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0129] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0130] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A lithium mica flotation collector, characterized in that, The lepidolite flotation collector comprises, by weight, 15-30 parts of sodium oleate n-butyl sulfate, 5-9 parts of coconut oil amine, 7-15 parts of carboxylic acid, 4-8 parts of solvent alcohol, and 2-6 parts of methyl isobutyl methanol.

2. The lithium mica flotation collector as described in claim 1, characterized in that, The carboxylic acid includes one or a combination of at least two of formic acid, glacial acetic acid, or propionic acid.

3. The lithium mica flotation collector as described in claim 1, characterized in that, The solvent alcohol includes one or a combination of at least two of methanol, ethanol, n-propanol or isopropanol.

4. A method for preparing a lithium mica flotation collector as described in any one of claims 1-3, characterized in that, The preparation method includes: According to the formula, coconut oil amine and carboxylic acid are mixed in the first step to obtain the first liquid; A second mixture of sodium oleate n-butyl sulfate, solvent alcohol, and methyl isobutyl methanol is obtained to produce a second solution. The first and second liquids are then mixed in a third step to obtain a lithium mica flotation collector.

5. The preparation method according to claim 4, characterized in that, The temperature of the first mixture is 25-30℃.

6. The preparation method according to claim 4, characterized in that, The first mixing time is 0.5-1h.

7. The preparation method according to claim 4, characterized in that, The temperature of the second mixture is 20-30℃.

8. The preparation method according to claim 4, characterized in that, The second mixing time is 0.5-1 hour.

9. The preparation method according to claim 4, characterized in that, The temperature of the third mixture is 25-30℃.

10. The preparation method according to claim 4, characterized in that, The third mixing time is 0.5-1 hour.

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