Method for compounding lithium oxide collecting agent in low-temperature environment
By constructing a collection framework based on palmitic acid soap and sulfonated petroleum, and compounding surfactants such as isomeric alcohol ethers, as well as introducing sodium fluoride and tannic acid inhibitors, the prepared lithium oxide collector maintains fluidity and dispersibility at low temperatures, achieving efficient spodumene collection, improving concentrate recovery rate and grade, and solving the problems of solidification and poor dispersibility of traditional collectors at low temperatures.
Patent Information
- Application Number
- CN202610041856.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-13
- Publication Date
- 2026-05-01
AI Technical Summary
Traditional lithium oxide collectors are prone to solidification and poor dispersibility at low temperatures, leading to fluctuations in spodumene concentrate grade and unstable recovery rates. This affects the selectivity and continuity of the flotation process, and increases energy consumption and operating costs.
A synergistic surfactant system was formed by combining palmitic acid soap and sulfonated petroleum as the main harvesting framework, and compounding isomeric alcohol ethers, fatty alcohol polyoxyethylene ethers and sodium polyoxyethylene ether sulfonate. Dipropylene glycol methyl ether was introduced as a low-temperature mutual solvent. Sodium fluoride activator and tannic acid and aluminum sulfate inhibitor were used to form a stable emulsion through high-pressure homogenization emulsification.
Maintaining the fluidity and dispersion stability of the reagents at low temperatures enables efficient and selective collection of spodumene, improving concentrate recovery and grade, and solving the problem of low efficiency in low-temperature flotation.
Smart Images
Figure CN121945307A_ABST
Abstract
Description
A method for compounding lithium oxide collectors under low-temperature conditions Technical Field
[0001] This invention relates to the field of mineral flotation technology, specifically to a method for compounding lithium oxide collectors under low-temperature conditions. Background Technology
[0002] In the flotation process of lithium oxide minerals such as spodumene, the performance of the collector directly affects the concentrate grade and recovery rate.
[0003] Traditional lithium oxide collectors (such as sodium oleate and sodium palmitate, which are fatty acid soaps) rely on the adsorption properties of their carboxylic acid groups on mineral surfaces, exhibiting a certain collecting ability at room temperature. However, these reagents have long molecular chains and high freezing points, making them prone to partial solidification, crystallization, or micelle formation in low-temperature environments (especially below 15°C). This leads to a sharp decrease in solubility, poor dispersibility, and uneven distribution in the slurry. This not only significantly reduces the probability of contact between the effective collecting components and the spodumene surface, resulting in decreased adsorption efficiency, but also severely affects the selectivity of the flotation process due to its heterogeneous distribution in the slurry, causing fluctuations in concentrate grade and unstable recovery rates. This is particularly prominent in mineral processing practices in high-latitude, high-altitude regions or cold seasons, often forcing companies to adopt additional measures such as heating the slurry or reagents, increasing energy consumption and operating costs, and severely restricting the continuity, economy, and technical indicators of mineral processing operations in low-temperature environments.
[0004] Currently, although there are some attempts in the industry to improve low-temperature fluidity by adding a single surfactant or making simple physical compounding, these improvements often have one side effect and the other side effect. They may only slightly improve fluidity but weaken the harvesting ability, or introduce foam that is detrimental to subsequent processes. It is still difficult to systematically solve the problem of achieving efficient and selective harvesting of spodumene while maintaining the good low-temperature physicochemical properties of the reagent.
[0005] Therefore, there is an urgent need for a compounding method that can systematically solve the problem of low-temperature flotation from the system design level. This method can significantly reduce the freezing point of reagents, improve low-temperature fluidity and dispersion stability through the synergistic effect of multiple components, and simultaneously achieve efficient selective activation of spodumene surface and strong inhibition of silicate gangue in low-temperature slurry. Summary of the Invention
[0006] (I) Technical Problem Solved To address the shortcomings of existing technologies, this invention provides a method for compounding lithium oxide collectors under low-temperature conditions, which possesses good low-temperature fluidity and dispersion stability, high selectivity and collection efficiency, and high efficiency in collecting spodumene concentrate. It boasts excellent recovery rate and grade, solving the problems of traditional collectors such as easy solidification and stratification failure at low temperatures, low flotation efficiency at low temperatures, and poor selectivity in separating spodumene and gangue minerals.
[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A method for compounding a lithium oxide collector under low-temperature conditions, comprising the following steps: S1, Preparation of compounding raw materials: Weighing palmitic acid soap, sulfonated petroleum, isomeric tridecyl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, sodium polyoxyethylene ether sulfonate, dipropylene glycol methyl ether, sodium carbonate, sodium hydroxide, sodium fluoride, aluminum sulfate, tannic acid, sodium octadecyl sulfonate, and deionized water in the formula proportions; S2, Dissolving the main agent: Adding palmitic acid soap and deionized water accounting for 30% of the total mass of the raw materials into a reaction vessel, and then adding sodium hydroxide and sodium carbonate to adjust the mixture. S3, Surfactant Compounding: Sulfonated petroleum, sodium octadecyl sulfonate isomeric tridecyl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, and sodium polyoxyethylene ether sulfonate are added sequentially to the product of S2; S4, Functional Additives: After cooling the mixture of S3, dipropylene glycol methyl ether, sodium fluoride, aluminum sulfate, tannic acid, and the remaining deionized water are added; S5, High-Pressure Homogenization and Emulsification: The mixture of S4 is homogenized under high pressure to form a stable emulsion, which is the finished lithium oxide collector; S6, Low-Temperature Environment Verification and Packaging: The low-temperature performance and flotation effect of the finished lithium oxide collector are tested, and it is sealed and packaged after passing the test.
[0008] Preferably, the lithium collector compound raw materials and their mass ratios in S1 are as follows: palmitic acid soap 15%-25%; sulfonated petroleum 10%-20%; isomeric tridecyl alcohol polyoxyethylene ether 5%-10%; fatty alcohol polyoxyethylene ether 8%-15%; sodium polyoxyethylene ether sulfonate 3%-8%; dipropylene glycol methyl ether 5%-10%; sodium carbonate 8%-15%; sodium hydroxide 2%-5%; sodium fluoride 0.5%-2.0%; aluminum sulfate 0.5%-2.0%; tannic acid 1%-4%; sodium octadecyl sulfonate 2%-5%; and the remaining component is deionized water.
[0009] Preferably, the palmitic acid soap is sodium palmitate soap, which is prepared by reacting palmitic acid with sodium hydroxide at 60-80°C, and its chemical reaction formula is as follows: In the formula, It represents palmitic acid. This indicates sodium hydroxide. This refers to sodium palmitate soap. It represents water.
[0010] Preferably, the fatty alcohol polyoxyethylene ether is prepared from lauryl alcohol, ethylene oxide, and an alkaline catalyst under high temperature of 120-180℃ and pressure of 0.2-0.6MPa, and its chemical reaction formula is as follows: In the formula, This indicates that lauryl alcohol is a fatty alcohol. It represents ethylene oxide. It refers to fatty alcohol polyoxyethylene ether.
[0011] Preferably, the saponification conditions for the S2 main agent are: saponification in a water bath at 75-80℃ for 75-85 minutes with stirring at a speed of 900-1000 r / min, and pH value controlled at 9.0-9.5 to form a homogeneous saponification solution.
[0012] Preferably, the S3 surfactant compounding conditions are: constant temperature stirring at 60-65℃ for 40-45 minutes, and stirring speed of 700-800 r / min.
[0013] Preferably, the S4 functional additive is added under the following conditions: the system is cooled to below 50°C, and dipropylene glycol methyl ether, sodium fluoride, aluminum sulfate, tannic acid and the remaining deionized water are added in sequence. The mixture is stirred for 20-30 minutes at a constant temperature of 40-50°C and a speed of 100-200 r / min until completely dissolved.
[0014] Preferably, the S5 high-pressure homogenization emulsification conditions are as follows: homogenization is carried out at 35-40°C using a high-pressure homogenizer at 20-22 MPa pressure for 13-15 minutes, and the solid content of the final product is controlled at 25-28%, thus obtaining the lithium oxide collector product.
[0015] Preferably, the S6 low-temperature environment verification involves placing the finished product in a low-temperature environment of 0-15℃ for 24 hours, observing for any precipitation or crystallization, and then performing flotation verification using spodumene or lepidolite samples.
[0016] Preferably, the collector is applied as follows: spodumene ore is ball-milled to a particle size of 0.065-0.075 mm, the slurry is adjusted to a slurry concentration of 28-32%, lithium oxide collector is added and mixed evenly, and lithium oxide flotation is carried out at a low temperature of 0-15℃.
[0017] Compared with the prior art, the present invention provides a compounding method for lithium oxide collectors in low-temperature environments, which has the following beneficial effects: 1. The present invention constructs a collecting framework based on palmitic acid soap and sulfonated petroleum, and compoundes isomeric alcohol ethers, fatty alcohol polyoxyethylene ether (AEO-9) and sodium polyoxyethylene ether sulfonate (AES) to form a synergistic surfactant system. At the same time, dipropylene glycol methyl ether (DPM) is introduced as a low-temperature mutual solvent, which greatly reduces the freezing point and viscosity of the collector system, so that it can maintain fluidity, uniformity and dispersion stability when used in low-temperature environments of 0-15℃, fundamentally avoiding failure problems caused by low-temperature solidification or stratification.
[0018] 2. This invention further introduces sodium fluoride as an activator and tannic acid and aluminum sulfate as synergistic inhibitors into the collector, achieving the dual purpose of selectively activating the spodumene surface and effectively inhibiting silicate gangue minerals in low-temperature slurry. This results in high selectivity and high collection efficiency even at low temperatures, leading to improved spodumene concentrate. The recovery rate is stable and superior to the beneficial effects of traditional and simply compounded collectors. Attached Figure Description
[0019] Figure 1 is a flowchart of the method for compounding the collector of the present invention. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Please refer to Figure 1. A method for compounding a lithium oxide collector under low-temperature conditions includes the following steps: S1. Preparation of compounding raw materials: Weigh palmitic acid soap, sulfonated petroleum, isomeric tridecyl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, sodium polyoxyethylene ether sulfonate, dipropylene glycol methyl ether, sodium carbonate, sodium hydroxide, sodium fluoride, aluminum sulfate, tannic acid, sodium octadecyl sulfonate, and deionized water in the formula proportions; S2. Dissolving the main agent: Add palmitic acid soap and deionized water (30% of the total mass of raw materials) to the reaction vessel, and then add sodium hydroxide and sodium carbonate to adjust the pH value of the solution; S3. Surfactant formulation: Sulfonated petroleum, sodium octadecyl sulfonate isotridecyl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, and sodium polyoxyethylene ether sulfonate are added sequentially to the S2 product; S4, Functional additives: After cooling the S3 mixture, dipropylene glycol methyl ether, sodium fluoride, aluminum sulfate, tannic acid, and the remaining deionized water are added; S5, High-pressure homogenization and emulsification: The S4 mixture is homogenized under high pressure to form a stable emulsion, which is the finished lithium oxide collector; S6, Low-temperature environment verification and packaging: The low-temperature performance and flotation effect of the finished lithium oxide collector are tested, and it is sealed and packaged after passing the test.
[0022] Specifically, the raw materials and their mass ratios for the lithium collector compound in S1 are as follows: palmitic acid soap 15%-25%; sulfonated petroleum ether 10%-20%; isotridecyl alcohol polyoxyethylene ether 5%-10%; fatty alcohol polyoxyethylene ether 8%-15%; sodium polyoxyethylene ether sulfonate (AES) 3%-8%; dipropylene glycol methyl ether (DPM) 5%-10%; sodium carbonate 8%-15%; sodium hydroxide 2%-5%; sodium fluoride (NaF) 0.5%-2.0%; aluminum sulfate 0.5%-2.0%; tannic acid 1%-4%; sodium octadecyl sulfonate 2%-5%; and the remaining component is deionized water. The specific functions of each raw material are shown in Table 1. Specifically, palmitic acid soap is sodium palmitate soap, which is prepared by reacting palmitic acid with sodium hydroxide at 60-80℃. Its chemical reaction formula is as follows: In the formula, It represents palmitic acid. This indicates sodium hydroxide. This refers to sodium palmitate soap. This step involves converting palmitic acid completely into sodium palmitate soap, constructing a basic collector system, and ensuring its solubility and stability under alkaline conditions.
[0023] Specifically, fatty alcohol polyoxyethylene ether is prepared from lauryl alcohol, ethylene oxide, and an alkaline catalyst (such as sodium hydroxide or potassium hydroxide) under high temperature of 120-180℃ and pressure of 0.2-0.6MPa. Its chemical reaction formula is as follows: In the formula, This indicates that lauryl alcohol is a fatty alcohol. It represents ethylene oxide. It refers to fatty alcohol polyoxyethylene ether.
[0024] Specifically, the saponification conditions for S2 main agent are as follows: saponify in a water bath at 75-80℃ for 75-85 minutes with stirring at a speed of 900-1000 r / min, and control the pH value at 9.0-9.5 to form a homogeneous saponification solution. This allows the palmitic acid soap to fully dissolve and complete the saponification reaction. The alkaline environment activates the activity of its carboxylic acid groups, laying a stable main agent system for subsequent compounding with other components and ensuring that the main collector can maintain good solubility performance at low temperatures.
[0025] Specifically, the S3 surfactant compounding conditions are as follows: constant temperature stirring at 60-65℃ for 40-45 minutes at a stirring speed of 700-800 r / min to ensure that all components are fully mixed without stratification. This step achieves the synergistic compounding of anionic and nonionic surfactants, utilizing the complementary carbon chain structures of different surfactants to broaden the range of action of the collector, while improving the low-temperature fluidity and dispersion ability of the system, thus providing a guarantee for the adsorption reaction in the slurry at low temperatures.
[0026] Specifically, the S4 functional additive addition conditions are as follows: Cool the system to below 50°C, add dipropylene glycol methyl ether, sodium fluoride, aluminum sulfate, tannic acid and the remaining deionized water in sequence, and stir for 20-30 minutes at a constant temperature of 40-50°C and a speed of 100-200 r / min until completely dissolved. By introducing low-temperature synergists, activators and inhibitors, dipropylene glycol methyl ether ensures the miscibility of each component at low temperature, sodium fluoride activates the surface of spodumene, and tannic acid and aluminum sulfate synergistically inhibit gangue minerals, thus constructing a complete system with collecting, activating and inhibiting functions.
[0027] Specifically, the S5 high-pressure homogenization emulsification conditions are as follows: homogenize at 20-22 MPa pressure for 13-15 minutes using a high-pressure homogenizer at 35-40℃, and finally control the solid content of the product to 25-28% to obtain the lithium oxide collector. This step breaks the compound system into tiny droplets, forming a thermodynamically stable emulsion structure, avoiding stratification or precipitation at low temperatures, and increasing the contact area between the collector and the mineral surface to improve adsorption efficiency.
[0028] Specifically, S6 low-temperature environment verification: The finished product is placed in a low-temperature environment of 0-15℃ and left to stand for 24 hours. After observing that there is no precipitation or crystallization, flotation verification of spodumene or lepidolite samples is carried out. The concentrate is required to be... With a recovery rate of ≥80% and a concentrate grade of ≥4.8%, this step screens out finished products that meet the standards for low-temperature stability and flotation performance, eliminating reagent failure caused by low temperature and ensuring that the product can play a stable role in actual low-temperature mineral processing scenarios.
[0029] Specifically, the collector application is as follows: take spodumene ore, ball mill it to a particle size of 0.065-0.075 mm, adjust the slurry concentration to 28-32%, add lithium oxide collector and mix well, and carry out lithium oxide flotation in a low temperature environment of 0-15℃. This step verifies the efficient separation of spodumene in a low temperature environment.
[0030] The lithium oxide collector prepared according to this invention was subjected to comparative flotation tests in four low-temperature environments. The experimental group used the complete compound collector of this invention, while the control group used a collector based on a single or compound component of this invention. The flotation conditions were as follows: spodumene ore was ball-milled to a particle size of 0.065-0.075 mm, pulp concentration was 30%, collector dosage was 1.0% of pulp mass, flotation time was 10 minutes, and the test index was the concentrate. Recovery rate and grade: Example 1 Low temperature environment: 0℃ (temperature controlled by ice water bath) Experimental group 1: The lithium oxide collector prepared according to the present invention (prepared according to steps S1-S5, with the median of the formula mass ratio: palmitic acid soap 20%, sulfonated petroleum 15%, isomeric tridecyl alcohol polyoxyethylene ether 7.5%, fatty alcohol polyoxyethylene ether 11.5%, sodium polyoxyethylene ether sulfonate 5.5%, dipropylene glycol methyl ether 7.5%, sodium carbonate 11.5%, sodium hydroxide 3.5%, sodium fluoride 1.25%, aluminum sulfate 1.25%, tannic acid 2.5%, sodium octadecyl sulfonate 3.5%, and the balance being deionized water).
[0031] Control group 1: Sodium palmitate soap collector (single component, active ingredient is sodium palmitate soap, mass fraction 25%, balance water), representing traditional fatty acid soap collectors.
[0032] Example 2 Low temperature environment: 5℃ (temperature controlled by a low temperature constant temperature bath) Experimental group 2: Same as experimental group 1, using the complete compound collector of this invention.
[0033] Control group 2: A simple combination of sulfonated petroleum and palmitic acid soap was used as a collector (the two were combined in a mass ratio of 20% palmitic acid soap and 15% sulfonated petroleum, with 10% sodium carbonate added to adjust the pH, and the remainder being water), representing a simple combination of soap-based collectors.
[0034] Example 3 Low temperature environment: 10℃ (temperature controlled by a low temperature constant temperature bath) Experimental group 3: Same as experimental group 1, using the complete compound collector of this invention.
[0035] Control group 3: Using a fatty alcohol polyoxyethylene ether-enhanced collector (mass ratio of 20% palmitic acid soap, 15% sulfonated petroleum, 10% fatty alcohol polyoxyethylene ether, 10% sodium carbonate, balance water), representing an improved collector with added surfactants.
[0036] Example 4 Low temperature environment: 15℃ (temperature controlled by a low temperature constant temperature bath) Experimental group 4: Same as experimental group 1, using the complete compound collector of this invention.
[0037] Control group 4: Using conventional lithium oxide collector (mainly sodium oleate soap, 25% by mass, with the remainder being water).
[0038] The flotation test results of the above four embodiments are summarized in Table 2: Table 2 Note: (1) Flotation conditions are uniform: spodumene ore ( The raw ore grade was 1.5%, 80% of the particles were ball-milled to 0.074 mm, the pulp concentration was 30%, the collector dosage was 1.0%, and the flotation temperature was consistent with the environment of the example.
[0039] (2) The recovery rate and grade are the average values of three parallel experiments, with a relative error of <2%.
[0040] (3) The complete compound collector of the present invention does not precipitate or crystallize at 0-15℃ and has good fluidity; the control group shows slight solidification or uneven dispersion at 0℃.
[0041] Analysis of Table 2 shows that, under low-temperature conditions of 0-15℃, the concentrate of the compound collector of this invention... The recovery rate remained stable at over 85% and the grade exceeded 5.0%, fully meeting the S6 standard of ≥80% recovery rate and ≥4.8% grade. In contrast, the performance of the control group decreased significantly with decreasing temperature. At 0℃, the recovery rate of sodium palmitate soap alone was only 65.4%, and even with the addition of sulfonated petroleum or surfactants, it was still far lower than that of the experimental group. The advantages of this invention are more obvious at lower temperatures. For example, at 0℃, the experimental group had a recovery rate 19.8 percentage points higher and a grade 1.1 percentage points higher than the control group.
[0042] In summary, this invention constructs a main collecting framework using palmitic acid soap and sulfonated petroleum, lowers the freezing point of the system and improves low-temperature dispersibility using nonionic surfactants such as isomeric alcohol ethers and AEO-9, enhances emulsification and foaming with AES, ensures component miscibility with DPM, activates the spodumene surface with NaF, and tannic acid and aluminum sulfate synergistically inhibit gangue. Ultimately, it achieves a balance between reagent stability, selectivity, and collecting efficiency at low temperatures. The prepared lithium oxide collector maintains excellent flotation performance even at low temperatures of 0-15℃, solving the problems of collector solidification, poor dispersibility, and low selectivity at low temperatures.
[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A method for compounding lithium oxide collectors under low-temperature conditions, characterized in that, Includes the following steps: S1. Preparation of compound raw materials: Weigh the palmitic acid soap, sulfonated petroleum, isomeric tridecyl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, sodium polyoxyethylene ether sulfonate, dipropylene glycol methyl ether, sodium carbonate, sodium hydroxide, sodium fluoride, aluminum sulfate, tannic acid, sodium octadecyl sulfonate, and deionized water according to the formula ratio; S2. Dissolving the main agent: Add the palmitic acid soap and deionized water (30% of the total mass of raw materials) to the reaction vessel, then add sodium hydroxide and sodium carbonate to adjust the pH value of the solution; S3. Compounding of surfactants: Add the surfactants sequentially to the product of S2. Add sulfonated petroleum, sodium octadecyl sulfonate isomeric tridecyl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, and sodium polyoxyethylene ether sulfonate; S4, Functional additives: After cooling the S3 mixture, add dipropylene glycol methyl ether, sodium fluoride, aluminum sulfate, tannic acid, and the remaining deionized water; S5, High-pressure homogenization and emulsification: Homogenize the S4 mixture under high pressure to form a stable emulsion, which is the finished lithium oxide collector; S6, Low-temperature environment verification and packaging: Test the low-temperature performance and flotation effect of the finished lithium oxide collector, and seal and package it after passing the test.
2. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 1, characterized in that, The lithium collector compound raw materials and their mass ratios in S1 are as follows: palmitic acid soap 15%-25%; sulfonated petroleum 10%-20%; isomeric tridecyl alcohol polyoxyethylene ether 5%-10%; fatty alcohol polyoxyethylene ether 8%-15%; sodium polyoxyethylene ether sulfonate 3%-8%; dipropylene glycol methyl ether 5%-10%; sodium carbonate 8%-15%; sodium hydroxide 2%-5%; sodium fluoride 0.5%-2.0%; aluminum sulfate 0.5%-2.0%; tannic acid 1%-4%; sodium octadecyl sulfonate 2%-5%; and the remaining component is deionized water.
3. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 2, characterized in that, The palmitic acid soap is sodium palmitate soap, which is prepared by reacting palmitic acid with sodium hydroxide at 60-80℃. Its chemical reaction formula is as follows: In the formula, It represents palmitic acid. This indicates sodium hydroxide. This refers to sodium palmitate soap. It represents water.
4. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 2, characterized in that, The fatty alcohol polyoxyethylene ether is prepared by lauryl alcohol, ethylene oxide, and an alkaline catalyst under high temperature of 120-180℃ and pressure of 0.2-0.6MPa. Its chemical reaction formula is as follows: In the formula, This indicates that lauryl alcohol is a fatty alcohol. It represents ethylene oxide. It refers to fatty alcohol polyoxyethylene ether.
5. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 2, characterized in that, The saponification conditions for the S2 main agent are as follows: saponification is carried out in a water bath at 75-80℃ for 75-85 minutes with stirring at a speed of 900-1000 r / min, and the pH value is controlled at 9.0-9.5 to form a homogeneous saponification solution.
6. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 1, characterized in that, The S3 surfactant compounding conditions are as follows: constant temperature stirring at 60-65℃ for 40-45 minutes, stirring speed 700-800r / min.
7. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 1, characterized in that, The S4 functional additive is added under the following conditions: the system is cooled to below 50°C, and dipropylene glycol methyl ether, sodium fluoride, aluminum sulfate, tannic acid and the remaining deionized water are added in sequence. The mixture is stirred for 20-30 minutes at a constant temperature of 40-50°C and a speed of 100-200 r / min until it is completely dissolved.
8. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 1, characterized in that, The S5 high-pressure homogenization emulsification conditions are as follows: homogenize at 35-40℃ using a high-pressure homogenizer at 20-22MPa pressure for 13-15 minutes, and finally control the solid content of the product to 25-28% to obtain the lithium oxide collector.
9. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 1, characterized in that, The S6 low-temperature environment verification: The finished product is placed in a low-temperature environment of 0-15℃ and left to stand for 24 hours. After observing that there is no precipitation or crystallization, flotation verification of spodumene or lepidolite ore samples is carried out.
10. The method for compounding a lithium oxide collector under low-temperature conditions according to claim 9, characterized in that, The collector is applied as follows: spodumene ore is ball-milled to a particle size of 0.065-0.075 mm, the slurry is adjusted to a slurry concentration of 28-32%, lithium oxide collector is added and mixed evenly, and lithium oxide flotation is carried out at a low temperature of 0-15℃.