A low-temperature lepidolite collector and its application

Abstract

The present invention belongs to the technical field of flotation of lithium mica minerals, and specifically relates to a low-temperature lithium mica collector and its application. The low-temperature lithium mica collector is prepared by mixing and compounding the following raw materials in parts by weight: 20-60 parts of sulfonate anion collector, 5-35 parts of amine cationic collector, 5-25 parts of pull-opening powder, 2-10 parts of solubilizer and 2-10 parts of dispersant. The low-temperature lithium mica collector provided by the present invention has a simple preparation process, no three wastes are discharged during the production process, has the advantages of good low-temperature performance, safe use, convenient addition, good selectivity, etc., can effectively replace other anion and cation combination collectors under existing conditions, and can achieve efficient and selective capture of lithium mica at low temperatures (10-15°C).

Description

Technical Field

[0001] The invention belongs to the technical field of lepidolite mineral flotation, and in particular relates to a low-temperature lepidolite collector and application thereof. Background Art

[0002] Lepidolite is one of the important lithium mineral resources for extracting lithium. In actual production, lepidolite is often separated from useless gangue minerals by flotation, thereby obtaining high-quality lepidolite concentrate.

[0003] Lepidolite ore is a silicate mineral, usually associated with gangue minerals such as quartz feldspar, and is mainly in the form of flakes or scales after dissociation. Fine-grained lepidolite is generally recycled by flotation. In its flotation process, the commonly used lepidolite collector is the traditional oxide ore flotation collector, such as amine collectors under acidic conditions, but the selectivity is not ideal; or fatty acid collectors or combined collectors are used under alkaline conditions, but fatty acid anion collectors need to be activated for flotation. Combined collectors are currently the most promising type of lepidolite collector, but their research and development and application still need to be further deepened.

[0004] The existing lithium mica collectors generally have the following problems: (1) Fe generated in the grinding stage 3+ Metal ions can inhibit the target minerals or activate gangue minerals, thus deteriorating the separation index; (2) Existing lithium mica collectors are difficult to adapt to lithium mica ores with high mud content; (3) Amine collectors are sensitive to slurry temperature (poor low temperature resistance); fatty acid collectors require large dosage; combined collectors need to be used in conjunction with a variety of inhibitors or dispersants, and the dosage system is complicated. Summary of the invention

[0005] In view of the technical defects of the existing lithium mica flotation technology, such as poor low-temperature performance of the collector, weak anti-mud interference ability, and complex dosage system, the present invention provides a low-temperature lithium mica collector and its application. The low-temperature lithium mica collector provided by the present invention has good low-temperature resistance, selectivity and collecting power, and can be directly floated without desludging.

[0006] In order to achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0007] A low-temperature lepidolite collector comprises a sulfonate anion collector, an amine cation collector, a pull-opening powder, a solubilizer and a dispersant.

[0008] Furthermore, the low-temperature lithium mica collector comprises: 20-60 parts of sulfonate anion collector, 5-35 parts of amine cationic collector, 5-25 parts of pull-opening powder, 2-10 parts of solubilizer and 2-10 parts of dispersant.

[0009] Further, the sulfonate anion collector is RCON(R1)CH2CH2SO3Na;

[0010] Wherein, R is a C6-C18 saturated or unsaturated alkyl group, and R1 is H or a C1-C3 saturated alkyl group. Specifically, the sulfonate anion collector is any one of sodium N-oleoyl-N-methyltaurate and sodium N-lauroyl-N-methyltaurate.

[0011] Furthermore, the amine cationic collector is N-coconut oil-1,3-propylene diamine or a mixed amine, wherein the mixed amine includes dodecylamine and octadecylamine;

[0012] Furthermore, the solubilizing agent includes one or both of sodium diisooctyl sulfosuccinate and sodium monoisooctyl sulfosuccinate.

[0013] Furthermore, the dispersant includes one or both of polyethylene glycol 200 and polyethylene glycol 400.

[0014] The invention discloses an application of a low-temperature lepidolite collector, wherein the low-temperature lepidolite collector is used for flotation of lepidolite.

[0015] Furthermore, the method for flotation of lepidolite using the low-temperature lepidolite collector comprises:

[0016] The lithium mica ore is crushed and ground until the ore with a slurry particle size of -200 mesh accounts for 60% of the total ore mass. No desliming is required, and no slurry pH is adjusted. The low-temperature resistant lithium mica collector is directly added, and then stirred and aerated flotation is performed. After two roughing selections are combined, three fine selections are performed to obtain the corresponding lithium mica concentrate, and finally a scavenging selection is performed.

[0017] Furthermore, in flotation, the dosage of the low-temperature resistant lithium mica collector is 300-1500 g / t lithium mica ore.

[0018] Beneficial technical effects of the present invention:

[0019] (1) The low-temperature lithium mica collector provided by the present invention contains a sulfonate anion collector and a cationic amine collector, which are surfactants and can help improve the solubility and dispersibility of the anion and cation mixed collector in the aqueous solution under low temperature conditions, thereby improving its collection performance for lithium mica under low temperature conditions; and through the synergistic effect and compound effect of the sulfonate anion collector and the cationic amine collector, the Fe 3+ The inhibitory effect of metal ions on the target mineral.

[0020] (2) The pull-opening powder added to the low-temperature lithium mica collector provided by the present invention has good wetting properties, good acid and alkali resistance and hard water resistance, can play a dual role of dispersion and emulsification, and has a good stabilizing effect on the anion-cation combination collector. In addition, the addition of the dispersant further enhances the dispersibility and solution stability of the anion-cation combination collector.

[0021] (3) The solubilizing agent added to the low-temperature lithium mica collector provided by the present invention belongs to the sulfonate series surfactant, which has a significant solubilizing effect on the anion-cation combination collector, thereby improving the "solubility" and "dispersibility" of the anion-cation combination collector in the ore slurry, which is beneficial to improve the collection performance of the combination collector under low-temperature environment. In addition, the dispersant added to the low-temperature lithium mica collector provided by the present invention can disperse the ore mud, thereby achieving the goal of eliminating the need for desludging and being suitable for lithium mica ores with high mud content.

[0022] (4) The low-temperature lithium mica collector provided by the present invention has a simple preparation process, no three wastes are discharged during the production process, has the advantages of good low-temperature performance, safe use, convenient addition, good selectivity, etc., and can effectively replace other anion-cation combination collectors under existing conditions, and can achieve efficient and selective collection of lithium mica at low temperatures (10-15°C). The low-temperature lithium mica collector provided by the present invention can be used for the flotation of low-grade lithium mica, especially suitable for the flotation technology of lithium mica under low temperature conditions, which is conducive to improving the Li recovery rate and sorting index. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The flotation process flow chart of lithium mica in the embodiment of the present invention is shown in FIG. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0026] Example 1: A low-temperature lithium mica collector comprises: 60 parts of sodium N-oleoyl-N-methyl taurate, 15 parts of N-cocoyl-1,3-propylene diamine, 10 parts of pull-opening powder, 10 parts of solubilizer sodium diisooctyl sulfosuccinate and 5 parts of dispersant polyethylene glycol 200.

[0027] The preparation method of the low-temperature lithium mica collector comprises the following steps: 60 parts of sodium N-oleoyl-N-methyl taurate, 15 parts of N-cocoyl-1,3-propylene diamine, 10 parts of pull-opening powder, 10 parts of sodium diisooctyl sulfosuccinate as a solubilizer and 5 parts of polyethylene glycol 200 as a dispersant are uniformly stirred to obtain the low-temperature resistant lithium mica collector of the present invention.

[0028] Example 2: A low-temperature lithium mica collector comprises: 60 parts of sodium N-lauroyl-N-methyltaurate, 15 parts of N-cocoyl-1,3-propylene diamine, 10 parts of pull-opening powder, 10 parts of solubilizer sodium diisooctyl sulfosuccinate and 5 parts of dispersant polyethylene glycol 400.

[0029] The preparation method of the low-temperature lithium mica collector comprises the following steps: 60 parts of sodium N-lauroyl-N-methyl taurate, 15 parts of N-cocoyl-1,3-propylene diamine, 10 parts of pull-opening powder, 10 parts of sodium diisooctyl sulfosuccinate as a solubilizer and 5 parts of polyethylene glycol 400 as a dispersant are uniformly stirred to obtain the low-temperature resistant lithium mica collector of the present invention.

[0030] Example 3: A low-temperature lithium mica collector comprises: 50 parts of sodium N-oleoyl-N-methyl taurate, 12 parts of mixed amines (including dodecylamine and octadecylamine), 20 parts of pull-opening powder, 8 parts of solubilizer sodium diisooctyl sulfosuccinate and 10 parts of dispersant polyethylene glycol 200.

[0031] The preparation method of the low-temperature lithium mica collector comprises the following steps: 50 parts of sodium N-oleoyl-N-methyl taurate, 12 parts of mixed amine, 20 parts of pull-opening powder, 8 parts of sodium diisooctyl sulfosuccinate as a solubilizer and 10 parts of polyethylene glycol 200 as a dispersant are uniformly stirred to obtain the low-temperature resistant lithium mica collector of the present invention.

[0032] Flotation tests were carried out on a lepidolite mine in Jiangxi, a lepidolite mine in Hunan, and a lepidolite mine in Xinjiang using the lepidolite collectors invented in Examples 1 to 3.

[0033] A lithium mica mine in Jiangxi Province, the original ore contains about 0.66% Li2O. Phase analysis results show that lithium minerals are mainly lithium mica, accompanied by a small amount of muscovite. In the grinding fineness -200 mesh accounting for 60%, secondary roughing operation - tertiary concentrating operation - primary scavenging operation (such as Figure 1 As shown, Figure 11× means stirring for 1 min, and 2× means stirring for 2 min). In the roughing operation, the low-temperature lithium mica collectors described in Example 1 and Example 2 are used in an amount of 600 g / t; the scavenging operation: the low-temperature lithium mica collectors described in Example 1 and Example 2 are used in an amount of 200 g / t; the concentrating operation: no reagent is added, and blank concentrating is performed. The closed-circuit test results are listed in Table 1.

[0034] A lithium mica mine in Hunan, the original ore contains about 0.81% Li2O. The results of phase analysis show that the lithium minerals are mainly lithium mica, accompanied by a small amount of spodumene. When the grinding fineness is -200 mesh, accounting for 65%, a secondary roughing operation, a third fine selection operation, and a scavenging operation are carried out. Among them, the roughing operation: the low-temperature lithium mica collector described in Example 1 and Example 3 is used respectively, and the amount of the collector is 500 g / t; the scavenging operation: the low-temperature lithium mica collector described in Example 1 and Example 3 is used respectively, and the amount of the collector is 200 g / t; the fine selection operation: no agent is added, and blank selection is performed. The results of the closed-circuit test are listed in Table 1.

[0035] A lithium mica mine in Xinjiang, the original ore contains about 1.28% Li2O. The results of phase analysis show that the lithium minerals are mainly lithium mica, accompanied by a small amount of muscovite and spodumene. In the grinding fineness -200 mesh accounting for 62%, a second roughing operation - a third fine selection operation - a scavenging operation is carried out. Among them, the roughing operation: the low-temperature lithium mica collector described in Example 2 and Example 3 is used respectively, and the collector dosage is 600 g / t; the scavenging operation: the low-temperature lithium mica collector described in Example 2 and Example 3 is used respectively, and the collector dosage is 200 g / t; the fine selection operation: no agent is added, blank fine selection. The results of the closed-circuit test are listed in Table 1.

[0036] Table 1 Closed-circuit flotation test results of different lepidolite ores in Examples 1 to 3

[0037]

[0038] The low-temperature lithium mica collector provided by the invention uses sulfonates with strong hard water resistance as main components, is compounded with amine cationic surfactants for synergistic enhancement, and is mixed with pulling powder, a solubilizing agent, a dispersant, and the like. The invention has the technical advantages of simple synthesis process, convenient operation, and no three wastes in the production process. During use, the collector can be used directly without desludging, is insensitive to temperature, has strong collecting ability and selectivity for lithium mica, is an excellent lithium mica collector, and is beneficial to improving sorting indicators.

[0039] The lepidolite collector provided by the present invention has a good selective collecting effect on lepidolite at low temperature, can realize efficient collection of lepidolite under neutral to weakly alkaline conditions, and has good anti-mud interference ability. Good flotation separation technical indicators can be obtained without desludging during flotation, and the technical problem that the lepidolite collector in the prior art needs to be desludged in advance can be solved, and the technical defects of poor fluidity and reduced collecting ability under low temperature conditions can be solved.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low temperature lepidolite collector, characterized in that: The low-temperature lithium mica collector comprises a sulfonate anion collector, an amine cation collector, a pull-opening powder, a solubilizer and a dispersant; the Fe 3+ The inhibitory effect of metal ions on target minerals; The low-temperature lepidolite collector can achieve efficient and selective collection of lepidolite at a low temperature of 10 to 15°C; According to the weight percentage, the low-temperature lithium mica collector comprises: 20-60 parts of sulfonate anion collector, 5-35 parts of amine cationic collector, 5-25 parts of pull-opening powder, 2-10 parts of solubilizer and 2-10 parts of dispersant; The sulfonate anion collector includes any one of sodium N-oleoyl-N-methyltaurate and sodium N-lauroyl-N-methyltaurate; The amine cationic collector is N-coconut oil-based-1,3-propylene diamine or a mixed amine; the mixed amine includes dodecylamine and octadecylamine; The solubilizing agent includes one or two of diisooctyl sodium sulfosuccinate and monoisooctyl sodium sulfosuccinate; The dispersant includes one or both of polyethylene glycol 200 and polyethylene glycol 400.

2. The application of a low-temperature lepidolite collector according to claim 1, characterized in that: The low-temperature lepidolite collector is used for flotation of lepidolite.

3. The application of a low-temperature lepidolite collector according to claim 2, characterized in that: The method for flotation of lepidolite using the low-temperature lepidolite collector comprises: The lithium mica ore is crushed and ground until the ore with a slurry particle size of -200 mesh accounts for 60-65% of the total ore mass, and the low-temperature lithium mica collector is directly added, and then stirred and aerated flotation is performed, and after two roughing selections are combined, three cleaning selections and one scavenging selection are performed to obtain the lithium mica concentrate.

4. The application of a low-temperature lepidolite collector according to claim 3, characterized in that: In flotation, the dosage of the low-temperature lithium mica collector is 300-1500 g / t lithium mica ore.

Images