A full flotation lithium process based on iron lithium mica combined with multiple collectors

Abstract

The present invention discloses a full-flotation lithium process method based on lithobite combined with multiple collectors. The present invention provides an application of a reagent composition for flotation of lithobite without desliming, and the full-flotation of lithobite is carried out. The lithobite is coarsely ground by a jaw crusher and finely ground by a roller crusher, thereby ensuring a particle size ratio of 38% to 42% for particles of 40 to 200 mesh and 58% to 62% for particles of -200 mesh. This allows the muddy lithobite and the reagent to fully interact, achieving thorough dispersion of the ore pulp solution and making the surface of the lithobite hydrophobic. A large amount of concentrate is flotated by adding a pH adjuster, an inhibitor, and a first collector in rough selection. A high-grade and high-recovery lithobite concentrate product is obtained by adding a second collector in primary selection and secondary selection. The lithium grade and lithium loss rate in the tailings are reduced by primary and secondary scavenging.

Description

Technical Field

[0001] The present invention relates to the field of separation and mineral processing, and in particular to a full-flotation lithium separation process based on lithophile mica combined with multiple collectors. Background Art

[0002] Lithium is widely used in numerous fields, including lithium batteries, the nuclear industry, and solid fuels. Lepidolite, a lithium-bearing mineral with significant reserves in my country, is a key resource for lithium extraction. Lithium deposits produce a large amount of fine-grained minerals during mineralization, weathering, and grinding. Furthermore, the crystal structure and chemical properties of layered aluminosilicate minerals are similar, the valuable metal grades are generally low, and the particle size is fine. Consequently, these resource advantages have yet to be fully translated into economic advantages. Flotation is the primary method for separating fine-grained, intercalated lepidolite ores.

[0003] Ferroborite is a mica with a complex and variable composition, with lithium oxide content ranging from 1.1% to 5%. Ferroborite is often associated with silicate minerals such as calcite, feldspar, and quartz. Due to its monolithic nature, feroborite is difficult to grind finely, resulting in concentrate grades below 3% and recoveries below 70%. Furthermore, prolonged grinding times can easily lead to sludge formation, resulting in suboptimal flotation performance. Consequently, most industrial processes require a pre-desludge removal step, significantly increasing costs and the loss of lithium content during flotation.

[0004] At present, most of the flotation recycling of muddy iron lithium mica in my country adopts the method of pre-desliming. This method is not only complicated but also leads to the loss of metals in the iron lithium mica.

[0005] The existing technology for flotation of lithophile mica has the following problems: (1) Single amine collectors have poor adaptability to ore slime and need to be desludged before flotation. Although desludging can reduce the harmful effects of ore slime on lithophile mica flotation, the process will lead to loss of lithium content, which is not conducive to improving the lithium grade in the concentrate; (2) Alkyl primary amine salts are one or more alkyl primary amines with a carbon chain length of 8 to 18. Alkyl primary amines have a low freezing point and are difficult to dissolve in water. They need to react with acetic acid or hydrochloric acid to form alkyl primary amine salts, and the reagent preparation process is relatively complicated; (3) During the flotation process, the amine collector foam has high viscosity and strong stability, and the foam The amount is large, and it is not conducive to improving the lithium grade of iron lithium mica concentrate after the foam bursts; (4) When a single alkyl primary amine is used as a collector, the flotation of lithium mica needs to be carried out under strong acidic conditions (pH = 2 to 4). Under strong acidic conditions, flotation has a harsh operating environment, high safety hazards, and higher requirements for equipment corrosion protection. It also causes serious environmental pollution and difficulties in wastewater recycling; (5) When a combined anion and cation collector is used, a large amount of inhibitors need to be added during the re-selection process, which increases the difficulty of flotation operation and the cost of reagents. At the same time, a large amount of water glass inhibitors with strong dispersibility will also lead to difficulties in tailings sedimentation.

[0006] Therefore, the development of efficient, green and environmentally friendly ferrolithium mica flotation process and collectors with better ferrolithium mica selectivity is of great significance to improving the comprehensive utilization rate of ferrolithium mica resources. Summary of the Invention

[0007] The main purpose of the present invention is to provide a full flotation lithium process method based on iron lithium mica combined with multiple collectors, aiming to solve the above technical problems.

[0008] To achieve the above object, the present invention proposes a full flotation lithium process based on lithophile mica combined with multiple collectors, comprising the following steps: first, crushing the lithophile mica ore into a particle size of 40-120 meshes by a jaw crusher and then crushing the particle size into 120-325 meshes by a double-roll crusher;

[0009] Step 2: Take a certain amount of ore sample and add it to a single tank flotation machine for roughing, add a pH adjuster to adjust the pH to 8-9, add 1.6 ml of 2.5% inhibitor and 5.4 ml of 3% first collector, wherein the ore sample has a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%;

[0010] Step 3: After the roughing, the tailings are further subjected to a scavenging process in a single-tank flotation machine, and 0.8 ml of 2.5% depressant and 2.1 ml of 3% first collector are added;

[0011] Step 4: After the roughing in step 2, the concentrate is subjected to a first cleaning in a 0.5L single-tank flotation machine, and 1ml of 3% of the second collector is added;

[0012] Step 5: After the first scavenging in step 3, the tailings are further scavenged in a 1L single-tank flotation machine, and 0.8ml of 2.5% depressant and 2.1ml of 3% first collector are added;

[0013] Step 6: After the concentrate is concentrated once in step 4, it is subjected to secondary concentration in a 0.5L single-tank flotation machine;

[0014] Step 7: After secondary concentration and scavenging, different flotation ores are obtained, which are then filtered and drained with a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven.

[0015] In one embodiment, the pH adjuster is a sodium carbonate solution.

[0016] In one embodiment, the step of adding a pH adjuster to adjust the pH to 8-9 is specifically as follows:

[0017] 4.8 ml of 5% sodium carbonate solution was added to adjust the pH to 8.5.

[0018] In one embodiment, the inhibitor is a sodium hexametaphosphate solution.

[0019] In one embodiment, the first collector includes 10% to 15% of sodium lauryl sulfate, 25% to 35% of laurylamine polyoxyethylene ether, 10% to 15% of laurylamine, 1% to 2% of tetradecylamine, 8% to 10% of oleylamine, 0.2% to 0.3% of nonylphenol polyoxyethylene ether, 30% to 35% of anhydrous methanol, 5% to 10% of anhydrous ethanol, and 1% to 2% of pure water.

[0020] In one embodiment, the second collector includes 1% to 2% of sodium dodecylbenzene sulfonate, 10% to 15% of sodium dodecyl sulfate, 6% to 10% of sodium oleate, 15% to 20% of laurylamine polyoxyethylene ether, 1% to 2% of laurylamine, 1% to 2% of hexadecylamine, 1% to 2% of nonylphenol polyoxyethylene ether phosphate, 0.5% to 1% of polyethylene glycol, 5% to 10% of anhydrous ethanol, 1% to 2% of C8 mixed olefin solvent, and 50% to 55% of pure water.

[0021] In the technical solution of the present invention, a reagent composition for flotation of lithobite is provided, which can be used for full flotation of lithobite without desliming. The composition is coarsely ground by a jaw crusher and finely ground by a roller crusher to ensure the proportion of particle size, with 40-200 mesh accounting for 38%-42% and -200 mesh accounting for 58%-62%. This allows the muddy lithobite and the reagent to fully react with each other, achieving thorough dispersion of the slurry solution and making the surface of the lithobite hydrophobic. A large amount of concentrate is flotated by adding a pH adjuster, an inhibitor, and a first collector in the rough selection. A high-grade and high-recovery lithobite concentrate product is obtained by adding a second collector through primary selection and secondary selection. The lithium grade and lithium loss rate in the tailings are reduced through primary and secondary scavenging. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 The figure is a flow chart of a full lithium flotation process method based on iron lithium mica combined with multiple collectors according to an embodiment of the present invention.

[0024] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

[0027] Unless otherwise specified, the pharmaceutical agents mentioned in the examples are all commercially available versions.

[0028] The percentage sign "%" involved in the present invention, unless otherwise specified, refers to mass percentage; however, the percentage of a solution refers to the number of grams of solute contained in 100 ml of the solution.

[0029] A certain iron lithium mica mine in Yichun, Jiangxi Province was selected. The gangue mainly includes quartz, feldspar and calcite, and the lithium oxide grade of the ore is 0.5% to 0.6%.

[0030] The present invention provides a full-flotation lithium process method based on lithophile mica combined with multiple collectors.

[0031] like Figure 1 As shown, the full flotation lithium process method based on iron lithium mica combined with multiple collectors provided in the embodiment of the present invention includes:

[0032] Step 1: The iron lithium mica ore is crushed by a jaw crusher to a particle size of 40-120 mesh, and then crushed by a roller crusher to a particle size of 120-325 mesh;

[0033] Step 2: Take a certain amount of ore sample and add it to a single tank flotation machine for roughing, add a pH adjuster to adjust the pH to 8-9, add 1.6 ml of 2.5% inhibitor and 5.4 ml of 3% first collector, wherein the ore sample has a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%;

[0034] Step 3: After the roughing, the tailings are further subjected to a scavenging process in a single-tank flotation machine, and 0.8 ml of 2.5% depressant and 2.1 ml of 3% first collector are added;

[0035] Step 4: After the roughing in step 2, the concentrate is subjected to a first cleaning in a 0.5L single-tank flotation machine, and 1ml of 3% of the second collector is added;

[0036] Step 5: After the first scavenging in step 3, the tailings are further scavenged in a 1L single-tank flotation machine, and 0.8ml of 2.5% depressant and 2.1ml of 3% first collector are added;

[0037] Step 6: After the concentrate is concentrated once in step 4, it is subjected to secondary concentration in a 0.5L single-tank flotation machine;

[0038] Step 7: After secondary concentration and scavenging, different flotation ores are obtained, which are then filtered and drained with a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven.

[0039] The present application provides an application of a reagent composition for flotation of lithobite without desliming, and fully flotation of lithobite. By using a jaw crusher for coarse grinding and a roller crusher for fine grinding, the particle size ratio is guaranteed, with 40-200 mesh accounting for 38%-42% and -200 mesh accounting for 58%-62%. This allows the muddy lithobite and the reagent to fully react, achieving thorough dispersion of the slurry solution and making the surface of the lithobite hydrophobic. A large amount of concentrate is flotated by adding a pH adjuster, an inhibitor, and a first collector in the rough selection, and then a high-grade and high-recovery lithobite concentrate product is obtained by adding a second collector through primary selection and secondary selection. The lithium grade and lithium loss rate in the tailings are reduced through primary and secondary scavenging.

[0040] The present invention provides a pharmaceutical composition for the flotation of lepidolite, wherein the pH adjuster is a 5% sodium carbonate solution, which is mainly used to adjust the pH value in the pulp so that the pH value of the pulp during flotation is the optimal flotation condition; the inhibitor is 2.5% sodium hexametaphosphate, which is mainly used to thoroughly disperse the pulp solution and make the surface of the lepidolite hydrophobic, thereby inhibiting gangue.

[0041] In addition, the first collector is composed of 10% to 15% sodium lauryl sulfate, 25% to 35% laurylamine polyoxyethylene ether, 10% to 15% laurylamine, 1% to 2% tetradecylamine, 8% to 10% oleylamine, 0.2% to 0.3% nonylphenol polyoxyethylene ether, 30% to 35% anhydrous methanol, 5% to 10% anhydrous ethanol, and 1% to 2% pure water. The sodium lauryl sulfate acts as a surfactant and wetting agent, the laurylamine polyoxyethylene ether acts as a surfactant and collector, the nonylphenol polyoxyethylene ether acts as a surfactant and emulsifier, the laurylamine, tetradecylamine, and oleylamine all act as collectors, and the anhydrous methanol, anhydrous ethanol, and pure water act as solvents.

[0042] The second collector is composed of 1% to 2% sodium dodecylbenzene sulfonate, 10% to 15% sodium dodecyl sulfate, 6% to 10% sodium oleate, 15% to 20% laurylamine polyoxyethylene ether, 1% to 2% lauryl amine, 1% to 2% hexadecylamine, 1% to 2% nonylphenol polyoxyethylene ether phosphate, 0.5% to 1% polyethylene glycol, 5% to 10% anhydrous ethanol, 1% to 2% C8 mixed olefin solvent, and 50% to 55% pure water. Sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, and polyethylene glycol act as surfactants and wetting agents, laurylamine polyoxyethylene ether acts as a surfactant and collector, nonylphenol polyoxyethylene ether phosphate acts as a surfactant and emulsifier, sodium oleate, lauryl amine, and hexadecylamine act as collectors, and anhydrous ethanol, C8 mixed olefin solvent, and pure water act as solvents.

[0043] Both the first and second collectors are 3% solutions. Their purpose is to hydrophobically cause the mineral lepidolite to float and foam. The combined collectors are significantly more effective than a single agent, and the collector components and ratios are more refined. The first collector is used as a flotation collector for lower-grade lepidolite in the ore pulp. Because it has a high concentration of active ingredients, it is used for roughing, primary scavenging, and secondary scavenging. The second collector is used as a flotation collector for higher-grade lepidolite in the ore pulp. Because its active ingredients are relatively low, it is used for primary concentrating.

[0044] The present application is explained below through different embodiments.

[0045] Example 1

[0046] In this embodiment, the mass of the combined collector is 100 parts. In the first collector, there are 10 parts of sodium dodecyl sulfate, 28 parts of laurylamine polyoxyethylene ether, 10 parts of laurylamine, 2 parts of tetradecylamine, 8 parts of oleylamine, 0.2 parts of nonylphenol polyoxyethylene ether, 30 parts of methanol, 10 parts of ethanol, and 1.8 parts of water; in the second collector, there are 1 part of sodium dodecylbenzene sulfonate, 15 parts of sodium dodecyl sulfate, 6 parts of sodium oleate, 15 parts of laurylamine polyoxyethylene ether, 1 part of laurylamine, 2 parts of hexadecylamine, 1 part of nonylphenol polyoxyethylene ether, 1 part of polyethylene glycol, 5 parts of ethanol, 1 part of C8 mixed olefin solvent, and 52 parts of water;

[0047] The specific steps of flotation of lithium mica ore are as follows:

[0048] (1) The iron lithium mica ore is crushed by a jaw crusher to a particle size of 40-120 mesh; the particles of 40-120 mesh are then crushed by a roller crusher to a particle size of 200-325 mesh;

[0049] (2) 400 g of ore sample was added to a 1 L single tank flotation machine for rough selection, wherein the mass fraction of lithium oxide in the iron lithium mica ore was 0.5008%, and the mass percentage concentration of the iron lithium mica slurry was 40%; 4.8 ml of 5% pH adjuster (sodium carbonate) was added to adjust the pH to 8.5, 1.6 ml of 2.5% inhibitor (sodium hexametaphosphate) and 5.4 ml of 3% first collector were added, wherein the 400 g ore sample had a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%; the tailings after rough selection were continuously scavenged in a 1 L single tank flotation machine, and 0.8 ml of 2.5% inhibitor was added. Preparation, 2.1ml 3% first collector; the concentrate after roughing is subjected to primary cleaning in a 0.5L single-cell flotation machine, and 1ml 3% second collector is added; the tailings after primary scavenging are further subjected to secondary scavenging in a 1L single-cell flotation machine, and 0.8ml 2.5% depressant and 2.1ml 3% first collector are added; the concentrate after primary cleaning is subjected to secondary cleaning in a 0.5L single-cell flotation machine; after the two-cleaning and two-scavenging full flotation, six types of flotation ores are obtained, namely, clean 2, medium 1, medium 2, scavenging 1, scavenging 2, and tail 2. The ores are then filtered and drained with a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven. After complete drying, the lithium content is tested. The test results in this embodiment are that the lithium oxide grade of the lithium iron mica pure 2 is 2.9224%, the recovery rate is 83.4%, and the lithium oxide grade of the tail 2 is 0.0301%.

[0050] Example 2

[0051] In this embodiment, the mass of the combined collector is 100 parts. In the first collector, there are 10 parts of sodium dodecyl sulfate, 28 parts of laurylamine polyoxyethylene ether, 10 parts of laurylamine, 2 parts of tetradecylamine, 8 parts of oleylamine, 0.2 parts of nonylphenol polyoxyethylene ether, 30 parts of methanol, 10 parts of ethanol, and 1.8 parts of water; in the second collector, there are 2 parts of sodium dodecylbenzene sulfonate, 10 parts of sodium dodecyl sulfate, 10 parts of sodium oleate, 15 parts of laurylamine polyoxyethylene ether, 2 parts of laurylamine, 1 part of hexadecylamine, 2 parts of nonylphenol polyoxyethylene ether, 1 part of polyethylene glycol, 5 parts of ethanol, 2 parts of C8 mixed olefin solvent, and 50 parts of water;

[0052] The specific steps of flotation of lithium mica ore are as follows:

[0053] (1) The iron lithium mica ore is crushed by a jaw crusher to a particle size of 40-120 mesh; the particles of 40-120 mesh are then crushed by a roller crusher to a particle size of 200-325 mesh;

[0054] (2) 400 g of ore sample was added to a 1 L single tank flotation machine for rough selection, wherein the mass fraction of lithium oxide in the iron lithium mica ore was 0.5244%, and the mass percentage concentration of the iron lithium mica slurry was 40%; 4.8 ml of 5% pH adjuster (sodium carbonate) was added to adjust the pH to 8.5, 1.6 ml of 2.5% inhibitor (sodium hexametaphosphate) and 5.4 ml of 3% first collector were added, wherein the 400 g ore sample had a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%; the tailings after rough selection were continuously scavenged in a 1 L single tank flotation machine, and 0.8 ml of 2.5% inhibitor was added. Preparation, 2.1ml 3% first collector; the concentrate after roughing is subjected to primary cleaning in a 0.5L single-cell flotation machine, and 1ml 3% second collector is added; the tailings after primary scavenging are further subjected to secondary cleaning in a 1L single-cell flotation machine, and 0.8ml 2.5% depressant and 2.1ml 3% first collector are added; the concentrate after primary cleaning is subjected to secondary cleaning in a 0.5L single-cell flotation machine; after the two-cleaning and two-scavenging full flotation, six types of flotation ores are obtained, namely, clean 2, medium 1, medium 2, scavenging 1, scavenging 2, and tail 2. The ores are then filtered and drained with a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven. After complete drying, the lithium content is tested. The test results in this embodiment are that the lithium oxide grade of the lithium iron mica pure 2 is 2.9256%, the recovery rate is 84.5%, and the lithium oxide grade of the tail 2 is 0.0276%.

[0055] Example 3

[0056] In this embodiment, the mass of the combined collector is 100 parts. In the first collector, there are 13 parts of sodium dodecyl sulfate, 25 parts of laurylamine polyoxyethylene ether, 10 parts of laurylamine, 1 part of tetradecylamine, 9 parts of oleylamine, 0.3% of nonylphenol polyoxyethylene ether, 35 parts of methanol, 5 parts of ethanol, and 1.7 parts of water; in the second collector, there are 1 part of sodium dodecylbenzene sulfonate, 15 parts of sodium dodecyl sulfate, 6 parts of sodium oleate, 15 parts of laurylamine polyoxyethylene ether, 1 part of laurylamine, 2 parts of hexadecylamine, 1 part of nonylphenol polyoxyethylene ether, 1 part of polyethylene glycol, 5 parts of ethanol, 1 part of C8 mixed olefin solvent, and 52 parts of water;

[0057] The specific steps of flotation of lithium mica ore are as follows:

[0058] (1) The iron lithium mica ore is crushed by a jaw crusher to a particle size of 40-120 mesh; the particles of 40-120 mesh are then crushed by a roller crusher to a particle size of 200-325 mesh;

[0059] (2) 400 g of ore sample was added to a 1 L single tank flotation machine for rough selection, wherein the mass fraction of lithium oxide in the iron lithium mica ore was 0.5436%, and the mass percentage concentration of the iron lithium mica slurry was 40%; 4.8 ml of 5% pH adjuster (sodium carbonate) was added to adjust the pH to 8.5, 1.6 ml of 2.5% inhibitor (sodium hexametaphosphate) and 5.4 ml of 3% first collector were added, wherein the 400 g ore sample had a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%; the tailings after rough selection were continuously scavenged in a 1 L single tank flotation machine, and 0.8 ml of 2.5% inhibitor was added. Preparation, 2.1ml 3% first collector; the concentrate after roughing is subjected to primary cleaning in a 0.5L single-cell flotation machine, and 1ml 3% second collector is added; the tailings after primary scavenging are further subjected to secondary cleaning in a 1L single-cell flotation machine, and 0.8ml 2.5% depressant and 2.1ml 3% first collector are added; the concentrate after primary cleaning is subjected to secondary cleaning in a 0.5L single-cell flotation machine; after the two-cleaning and two-scavenging full flotation, six types of flotation ores are obtained, namely, clean 2, medium 1, medium 2, scavenging 1, scavenging 2, and tail 2. The ores are then filtered and drained with a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven. After complete drying, the lithium content is tested. The test results in this embodiment are that the lithium oxide grade of the lithium iron mica concentrate 2 is 2.9243%, the recovery rate is 85.2%, and the lithium oxide grade of the tail 2 is 0.0232%.

[0060] Example 4

[0061] In this embodiment, the mass of the combined collector is 100 parts. In the first collector, there are 13 parts of sodium dodecyl sulfate, 25 parts of laurylamine polyoxyethylene ether, 10 parts of laurylamine, 1 part of tetradecylamine, 9 parts of oleylamine, 0.3% of nonylphenol polyoxyethylene ether, 35 parts of methanol, 5 parts of ethanol, and 1.7 parts of water; in the second collector, there are 2 parts of sodium dodecylbenzene sulfonate, 10 parts of sodium dodecyl sulfate, 10 parts of sodium oleate, 15 parts of laurylamine polyoxyethylene ether, 2 parts of laurylamine, 1 part of hexadecylamine, 2 parts of nonylphenol polyoxyethylene ether, 1 part of polyethylene glycol, 5 parts of ethanol, 2 parts of C8 mixed olefin solvent, and 50 parts of water;

[0062] The specific steps of flotation of lithium mica ore are as follows:

[0063] (1) The iron lithium mica ore is crushed by a jaw crusher to a particle size of 40-120 mesh; the particles of 40-120 mesh are then crushed by a roller crusher to a particle size of 200-325 mesh;

[0064] (2) 400 g of ore sample was added to a 1 L single tank flotation machine for rough selection, wherein the mass fraction of lithium oxide in the iron lithium mica ore was 0.5546%, and the mass percentage concentration of the iron lithium mica slurry was 40%; 4.8 ml of 5% pH adjuster (sodium carbonate) was added to adjust the pH to 8.5, 1.6 ml of 2.5% inhibitor (sodium hexametaphosphate) and 5.4 ml of 3% first collector were added, wherein the 400 g ore sample had a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%; the tailings after rough selection were continuously scavenged in a 1 L single tank flotation machine, and 0.8 ml of 2.5% inhibitor was added. Preparation, 2.1ml 3% first collector; the concentrate after roughing is subjected to primary cleaning in a 0.5L single-cell flotation machine, and 1ml 3% second collector is added; the tailings after primary scavenging are further subjected to secondary scavenging in a 1L single-cell flotation machine, and 0.8ml 2.5% depressant and 2.1ml 3% first collector are added; the concentrate after primary cleaning is subjected to secondary cleaning in a 0.5L single-cell flotation machine; after the two-cleaning and two-scavenging full flotation, six types of flotation ores are obtained, namely, clean 2, medium 1, medium 2, scavenging 1, scavenging 2, and tail 2. The ores are then filtered and drained with a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven. After complete drying, the lithium content is tested. The test results in this embodiment are that the lithium oxide grade of the lithium iron mica pure 2 is 2.9649%, the recovery rate is 85.1%, and the lithium oxide grade of the tail 2 is 0.0227%.

[0065] In summary, under the condition that the raw ore lithium oxide grade is 0.5% to 0.6%, the lithium oxide grade obtained by the application method of the present invention is greater than 2.9%, and the recovery rate is greater than 83%. Therefore, the present invention has the advantages of no need for desliming, high lithium oxide grade, high recovery rate, and low reagent consumption.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A full flotation lithium process based on iron lithium mica combined with multiple collectors, characterized in that: The full flotation lithium process based on iron lithium mica combined with multiple collectors includes: Step 1: The iron lithium mica ore is crushed by a jaw crusher to a particle size of 40-120 mesh, and then crushed by a roller crusher to a particle size of 120-325 mesh; Step 2: Take a certain amount of ore sample and add it to a single tank flotation machine for roughing, add a pH adjuster to adjust the pH to 8-9, add 1.6 ml of 2.5% inhibitor and 5.4 ml of 3% first collector, wherein the ore sample has a particle size of 40-200 mesh accounting for 38%-42%, and the particle size of -200 mesh accounting for 58%-62%; Step 3: After the roughing, the tailings are further subjected to a scavenging process in a single-tank flotation machine, and 0.8 ml of 2.5% depressant and 2.1 ml of 3% first collector are added; Step 4: After the roughing in step 2, the concentrate is subjected to a first cleaning in a 0.5L single-tank flotation machine, and 1ml of 3% of the second collector is added; Step 5: After the first scavenging in step 3, the tailings are further scavenged in a 1L single-tank flotation machine, and 0.8ml of 2.5% depressant and 2.1ml of 3% first collector are added; Step 6: After the concentrate is concentrated once in step 4, it is subjected to secondary concentration in a 0.5L single-tank flotation machine; Step 7: After secondary concentration and scavenging, different flotation ores are obtained, which are then filtered and drained by a circulating water multi-purpose vacuum pump, and then dried in an electric blast drying oven; The first collector comprises 10% to 15% of sodium lauryl sulfate, 25% to 35% of laurylamine polyoxyethylene ether, 10% to 15% of laurylamine, 1% to 2% of tetradecylamine, 8% to 10% of oleylamine, 0.2% to 0.3% of nonylphenol polyoxyethylene ether, 30% to 35% of anhydrous methanol, 5% to 10% of anhydrous ethanol, and 1% to 2% of pure water; The second collector includes 1% to 2% of sodium dodecylbenzene sulfonate, 10% to 15% of sodium lauryl sulfate, 6% to 10% of sodium oleate, 15% to 20% of laurylamine polyoxyethylene ether, 1% to 2% of laurylamine, 1% to 2% of hexadecylamine, 1% to 2% of nonylphenol polyoxyethylene ether phosphate, 0.5% to 1% of polyethylene glycol, 5% to 10% of anhydrous ethanol, 1% to 2% of C8 mixed olefin solvent, and 50% to 55% of pure water.

2. The full flotation lithium process based on iron lithium mica combined with multiple collectors according to claim 1, characterized in that: The pH adjuster is sodium carbonate solution.

3. The full flotation lithium process based on iron lithium mica combined with multiple collectors according to claim 1, characterized in that: The step of adding a pH adjuster to adjust the pH to 8-9 is specifically as follows: 4.8 ml of 5% sodium carbonate solution was added to adjust the pH to 8.

5.

4. The full flotation lithium process based on iron lithium mica combined with multiple collectors according to claim 1, characterized in that: The inhibitor is a sodium hexametaphosphate solution.

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