Collecting agent for flotation of iron lepidolite and beneficiation method of iron lepidolite

Abstract

The invention provides a collecting agent for flotation of iron lepidolite and a beneficiation method of iron lepidolite, and relates to the field of beneficiation. The collecting agent comprises the following raw materials in parts by weight: 10-30 parts of oleic acid, 5-15 parts of petroleum sodium sulfonate, 5-15 parts of dodecyl primary amine, 7-20 parts of glacial acetic acid and 8-15 parts of ethanol. The collecting agent is easy to dissolve and disperse in ore pulp, selective adsorption of the collecting agent on the surface of lepidolite is achieved, the collecting capacity and selectivity of the collecting agent are improved, and the obvious defects that a large amount of hydrochloric acid needs to be added in the preparation and use process of a traditional amine collecting agent, volatility and corrosivity are high, the requirement for corrosion prevention of equipment is high, and harm to the human body is large are overcome.

Description

Technical Field

[0001] The present application relates to the field of mineral processing, and in particular to a collector for flotation of ferrolithium mica and a mineral processing method for ferrolithium mica. Background Art

[0002] As one of the key mineral raw materials for lithium extraction, lepidolite plays a pivotal role in modern industry. With the rapid development of the global new energy industry, especially the rise of electric vehicles and energy storage, the demand for lithium resources has shown explosive growth. As a common type of lepidolite, the efficient recovery of iron lithium mica is crucial to meet the growing demand for lithium and ensure the stability of the lithium resource supply chain.

[0003] Traditional lithium mica beneficiation technology is mostly based on acidic conditions, relying on amine collectors to achieve the purpose of flotation recovery. However, the acidic environment is not only highly corrosive, but also has extremely high requirements on the material of the beneficiation equipment, which greatly increases the maintenance cost and replacement frequency of the equipment, and also threatens the personal safety of on-site operators at all times; traditional iron lithium mica generally uses acidic conditions similar to lithium mica, relying on amine collectors to achieve the purpose of flotation recovery.

[0004] However, the presence of iron changes the crystal structure and electron cloud distribution of ferrolithium mica. The occurrence state of iron is complex and may exist in the crystal lattice in different valence states, resulting in a certain degree of distortion in its crystal structure. This structural change makes the surface properties of ferrolithium mica more complex, and the surface activity of different parts is different, which increases the complexity of the interaction between reagents and mineral surfaces during flotation, and the flotation difficulty is relatively higher. At the same time, some ferrolithium mica has a finer embedded particle size and requires finer grinding to achieve monomer dissociation. However, excessive grinding can lead to mineral mudification. During the flotation process, fine-grained ferrolithium mica is more likely to agglomerate due to its large specific surface area and high surface energy, and the separation difficulty from fine-grained gangue minerals increases, making the flotation operation more difficult.

[0005] It is precisely because of the mineral properties of lithium iron mica that compared with lithium lepidolite, lithium iron mica has problems such as low recovery rate and low concentrate quality, making it difficult to meet the growing demand for lithium resources.

[0006] Therefore, whether from the perspective of environmental protection and safety, or based on the complex characteristics of lithium iron ore mica itself, a more efficient and environmentally friendly lithium iron ore beneficiation method is urgently needed. Summary of the invention

[0007] The purpose of the present application is to provide a collector for flotation of ferrolithium mica and a ore dressing method for ferrolithium mica to solve the above problems.

[0008] To achieve the above objectives, the present application provides a collector for flotation of ferrolithium mica in a first aspect, wherein the raw materials of the collector include, by weight: 10-30 parts of oleic acid, 5-15 parts of sodium petroleum sulfonate, 5-15 parts of dodecyl primary amine, 7-20 parts of glacial acetic acid and 8-15 parts of ethanol.

[0009] Optionally, the raw materials of the collector include, by weight: 15-30 parts of oleic acid, 5-10 parts of sodium petroleum sulfonate, 5-10 parts of dodecyl primary amine, 7-15 parts of glacial acetic acid and 8-10 parts of ethanol.

[0010] The second aspect of the present application provides a method for beneficiating iron lithium mica, comprising: The iron-containing lithium mica mineral is subjected to cyclone classification to obtain sedimentary sand; The sediment is subjected to magnetic separation to obtain a magnetic product; The magnetic product is subjected to flotation to obtain iron lithium mica concentrate; The collector is used in the flotation process.

[0011] Optionally, the fineness of the iron-containing lithium mica mineral is -0.074 mm, accounting for 40%-60%.

[0012] Optionally, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. The cyclone classification is performed at least once; B. The cyclone classification also produces an overflow, and the particle size of the solid particles contained in the overflow is ≤0.010 mm.

[0013] Optionally, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. the magnetic separation is performed at least once; B. The magnetic field strength of the magnetic separation is 1T-1.8T.

[0014] Optionally, the flotation includes roughing, cleaning and scavenging; The flotation reagents used in the roughing process include the collector and the pH adjuster; The selection process is blank selection; The flotation reagent used in the sweeping process includes the collector.

[0015] Optionally, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. The pH adjuster includes sodium carbonate and / or sodium bicarbonate; B. The pH value during the roughing process is greater than 7 and less than or equal to 9.

[0016] Optionally, the amount of the collector used in the roughing process is 100 g / t-600 g / t of raw ore; The amount of the collector used in the scavenging process is 50 g / t to 100 g / t of the original ore.

[0017] Optionally, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. the roughing is performed at least once; B. The selection is performed at least twice; C. The scanning is performed at least once.

[0018] Compared with the prior art, the beneficial effects of this application include: The collector for flotation of lithium iron mica provided in the present application is easy to dissolve and disperse in the ore pulp, and realizes its selective adsorption on the surface of lithium mica, thereby improving the collection capacity and selectivity, and overcoming the obvious disadvantages of traditional amine collectors, such as the need to add a large amount of hydrochloric acid during the preparation and use process, the volatility, strong corrosiveness, high requirements for equipment corrosion protection, and great harm to the human body.

[0019] The ore dressing method of iron lithium mica provided in the present application adopts a desliming-magnetic-flotation combined process flow of cyclone classification-magnetic separation-flotation to the iron lithium mica mineral, removes most of the fine-grained ore slime through the cyclone classification and desliming link, eliminates the influence of the ore slime on the iron lithium mica; the sedimentation enters the magnetic separation, pre-enriches the iron lithium mica into the magnetic product, and discards the non-magnetic product of the gangue mineral as soon as possible; the magnetic product enters the flotation operation, and a specific collector is used to recover the iron lithium mica in the flotation, thereby solving the problems of easy mudification, low recovery rate, and low grade of the iron lithium mica, and efficiently recovers the iron lithium mica mineral. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope of the present application.

[0021] Figure 1 A schematic flow chart of the beneficiation method for lithium iron mica provided in Example 1. DETAILED DESCRIPTION

[0022] As used herein: "Prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0023] The conjunction "consisting of excludes any unspecified element, step, or component. If used in a claim, this phrase renders the claim closed-ended so that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the body of a claim rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0024] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described in this article, unless otherwise stated, the range is intended to include its end values ​​and all integers and fractions within the range.

[0025] In these examples, parts and percentages are by mass unless otherwise indicated.

[0026] "Mass parts" refers to the basic unit of measurement for expressing the mass ratio of multiple components. 1 part can represent any unit mass, such as 1g or 2.689g. If we say that the mass parts of component A are a parts and the mass parts of component B are b parts, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it means that the mass of component A is aK and the mass of component B is bK (K is an arbitrary number, indicating a multiple factor). It should not be misunderstood that, unlike the mass parts, the sum of the mass parts of all components is not limited to 100 parts.

[0027] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0028] The first aspect of the present application provides a collector for flotation of ferrolithium mica, wherein the raw materials of the collector include, by weight: 10-30 parts of oleic acid, 5-15 parts of sodium petroleum sulfonate, 5-15 parts of dodecyl primary amine, 7-20 parts of glacial acetic acid and 8-15 parts of ethanol.

[0029] Optionally, the raw materials of the collector are measured by weight: oleic acid can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts or any value between 10 parts and 30 parts; sodium petroleum sulfonate can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or any value between 5 parts and 15 parts; The dialkyl primary amine may be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or any value between 5 parts and 15 parts; the glacial acetic acid may be 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts or any value between 7 parts and 20 parts; and the ethanol may be 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or any value between 8 parts and 15 parts.

[0030] In some embodiments, the raw materials of the collector include, by weight: 15-30 parts of oleic acid, 5-10 parts of sodium petroleum sulfonate, 5-10 parts of dodecyl primary amine, 7-15 parts of glacial acetic acid and 8-10 parts of ethanol.

[0031] Optionally, the raw materials of the collector are measured by weight: oleic acid can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts or any value between 15 parts and 30 parts, sodium petroleum sulfonate can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts or any value between 5 parts and 10 parts, dodecyl primary amine can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts or any value between 5 parts and 10 parts, glacial acetic acid can be 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or any value between 7 parts and 15 parts, and ethanol can be 8 parts, 9 parts, 10 parts or any value between 8 parts and 10 parts.

[0032] The second aspect of the present application provides a method for beneficiating iron lithium mica, comprising: The iron-containing lithium mica mineral is subjected to cyclone classification to obtain sedimentary sand; The sediment is subjected to magnetic separation to obtain a magnetic product; The magnetic product is subjected to flotation to obtain iron lithium mica concentrate; The collector is used in the flotation process.

[0033] It should be noted that by combining a specific flotation process with a specific collector, the useful minerals in the iron lithium mica ore are efficiently recovered. Furthermore, the cyclone is used for cyclone classification to remove mud, and the mud with smaller particle size is removed in advance, eliminating the magnetic inclusion of the mud during the subsequent strong magnetic separation, and also eliminating the influence of the mud on the subsequent flotation. The magnetic separation adopts the weak magnetic characteristics of iron lithium mica to enrich the iron lithium mica into the magnetic product, discard most of the other gangue minerals, and reduce the yield of the subsequent flotation operation. The working principle of the specific collector used is: in an appropriate pH value (weakly alkaline) and slurry environment, the surface of iron lithium mica is negatively charged due to the dissociation of ions in its lattice and the presence of hydroxyl groups, and dodecyl primary amine contains positively charged groups (-NH 3+ ), will preferentially electrostatically adsorb with the negatively charged areas on the surface of lithium mica; oleic acid contains anionic active groups such as carboxyl (-COOH) and sodium petroleum sulfonate sulfonic acid group (-SO3H). When the surface of lithium iron mica is charged due to the adsorption of cationic collectors, anionic collectors (oleic acid, sodium petroleum sulfonate) are more accessible and chemically adsorbed. At the same time, the active groups of oleic acid and sodium petroleum sulfonate collectors can also be electrostatically adsorbed with the metal ion sites (Li + , K + 、Al 3+ ) chemically reacts with the anionic collector molecules on the surface of iron lithium mica through chemical adsorption and physical adsorption, which together form a hydrophobic "shell", greatly increasing the ability of iron lithium mica to combine with bubbles, forming a multi-layer hydrophobic structure, making the mica easier to be floated and separated; glacial acetic acid reacts with dodecyl primary amine to produce soluble salts, thereby increasing the solubility of dodecyl primary amine and further improving the electrostatic adsorption efficiency; ethanol is an organic solvent that can promote the dissolution and dispersion of the collector in the slurry, making it evenly distributed in the slurry, which is more conducive to the flotation of iron lithium mica.

[0034] In some embodiments, the fineness of the iron-containing lithium mica mineral is -0.074 mm, accounting for 40%-60%.

[0035] Optionally, the iron-containing lithium mica mineral having a fineness of -0.074 mm can account for 40%, 45%, 50%, 55%, 60% or any value between 40% and 60%.

[0036] In some embodiments, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. The cyclone classification is performed at least once; Optionally, the cyclone classification may be 1 time, 2 times, 3 times, 4 times, 5 times, 8 times, 10 times or any value of at least 1 time; It should be noted that the hydrocyclone is used for cyclone classification to achieve the effect of desludging. The hydrocyclone desludging process removes most of the -0.010mm fine-grained ore mud and eliminates the influence of ore mud on iron lithium mica. B. The cyclone classification also produces an overflow, and the particle size of the solid particles contained in the overflow is ≤0.010 mm.

[0037] Optionally, the particle size of the solid particles contained in the overflow may be 0.00001 mm, 0.0001 mm, 0.001 mm, 0.005 mm, 0.01 mm or any value ≤0.010 mm.

[0038] In some embodiments, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. the magnetic separation is performed at least once; Optionally, the magnetic separation may be any value of 1 time, 2 times, 3 times, 4 times, 5 times, 8 times, 10 times or at least 1 time; B. The magnetic field strength of the magnetic separation is 1T-1.8T.

[0039] Optionally, the magnetic field strength of the magnetic separation can be 1T, 1.1T, 1.2T, 1.3T, 1.4T, 1.5T, 1.6T, 1.7T, 1.8T or any value between 1T and 1.8T.

[0040] It should be noted that the magnetic separation is high-intensity magnetic separation, which includes the use of a high-intensity magnetic machine for processing.

[0041] In some embodiments, the flotation comprises roughing, cleaning and scavenging; The flotation reagents used in the roughing process include the collector and the pH adjuster; The selection process is blank selection; It should be noted that blank concentration is the flotation of the rough concentrate obtained from roughing without adding flotation reagents; The flotation reagent used in the sweeping process includes the collector.

[0042] In some embodiments, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. The pH adjuster includes sodium carbonate and / or sodium bicarbonate; B. The pH value during the roughing process is greater than 7 and less than or equal to 9.

[0043] It should also be noted that in the roughing process of ferrolithium mica, it is critical to control the pH value to be greater than 7 and less than or equal to 9; from the perspective of collector performance, in a weakly alkaline environment, oleic acid dissociates into oleate ions, which can better bind to the active sites on the surface of ferrolithium mica. After glacial acetic acid reacts with dodecyl primary amine to form salts, it can also maintain good activity and stability, which is conducive to the dispersion of the collector and contact with the mineral. For ferrolithium mica itself, this pH range can adjust its surface charge, facilitate collector adsorption, maintain surface stability, and prevent excessive dissolution or chemical reactions. In terms of suppressing impurities, a pH of 7-9 can inhibit the floating of gangue minerals such as quartz, reduce their consumption of collectors, and improve collection efficiency.

[0044] Optionally, the pH value during the roughing process can be 7.1, 7.5, 8, 8.5, 9, or any value greater than 7 and less than or equal to 9.

[0045] In some embodiments, the amount of the collector used in the roughing process is 100 g / t-600 g / t of raw ore; Optionally, the amount of the collector used in the roughing process can be 100 g / t of raw ore, 200 g / t of raw ore, 300 g / t of raw ore, 400 g / t of raw ore, 500 g / t of raw ore, 600 g / t of raw ore or any value between 100 g / t of raw ore and 600 g / t of raw ore; The amount of the collector used in the scavenging process is 50 g / t to 100 g / t of the original ore.

[0046] Optionally, the amount of collector used in the scavenging process can be 50g / t of raw ore, 60g / t of raw ore, 70g / t of raw ore, 80g / t of raw ore, 90g / t of raw ore, 100g / t of raw ore or any value between 50g / t of raw ore and 100g / t of raw ore.

[0047] In some embodiments, the method for beneficiating ferrolithium mica satisfies at least one of the following conditions: A. the roughing is performed at least once; Optionally, the rough selection may be any value of 1 time, 2 times, 3 times, 4 times, 5 times, 8 times, 10 times or at least 1 time; B. The selection is performed at least twice; Optionally, the selection may be any value of 2, 3, 4, 5, 8, 10 or at least 2 times; C. The scanning is performed at least once.

[0048] Optionally, the scan selection may be 1 time, 2 times, 3 times, 4 times, 5 times, 8 times, 10 times or any value of at least 1 time.

[0049] The ore dressing method of iron lithium mica provided in the present application adopts a combined ore dressing process of desludging-strong magnetic separation-flotation for the iron lithium mica ore, and each link cooperates closely to achieve effective pre-enrichment of the iron lithium mica, while eliminating the influence of fine mud impurities, improving the flotation efficiency of the iron lithium mica, and efficiently recovering the iron lithium mica mineral.

[0050] The embodiments of the present application will be described in detail below in conjunction with specific examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. If specific conditions are not specified in the examples, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0051] Example 1 In a first aspect, the present embodiment provides a collector for flotation of ferrolithium mica, wherein the raw materials thereof, measured in parts by weight, include: 23 parts of oleic acid, 7 parts of sodium petroleum sulfonate, 8 parts of dodecylamine, 13 parts of acetic acid and 8 parts of ethanol.

[0052] The second aspect of the present embodiment provides a method for beneficiating lithodactite, which performs beneficiation treatment on a lithodactite ore (with a Li2O content of 0.52%), comprising the following beneficiation steps: (a) The mineral is ground into -0.074mm by ball mill with a content of 43% and then enters the hydrocyclone for desludging. The hydrocyclone pressure is 0.12Mpa, and the overflow with sedimentation and particle size ≤0.010mm is obtained; (b) The sand settling obtained in step (a) is slurried until the mass concentration of the obtained ore pulp is 20%; a strong magnetic machine is used for magnetic separation with a magnetic field strength of 1.8T to obtain a magnetic product and a non-magnetic product.

[0053] (c) slurrying the magnetic product obtained in step (b) until the mass concentration of the obtained slurry is 35%; sodium carbonate is added to adjust the pH value of the slurry to 8.5, and a collector is added for flotation to produce iron lithium mica concentrate and tailings; The flotation process includes: primary roughing: adding pH adjuster and collector to the pulp to float the lithium mica to obtain primary roughing concentrate and primary roughing tailings; the primary roughing tailings are used as feed for primary scavenging, and the primary roughing concentrate is used as feed for concentrating; based on the feed amount, the addition amount of pH adjuster is 300g / t of raw ore, and the addition amount of collector is 300g / t of raw ore; The primary scavenging process includes: adding a collector to the primary roughing tailings to float the lepidolite, obtaining a primary scavenging concentrate and tailings, and returning the primary scavenging concentrate to the primary roughing process; wherein, the amount of collector added is 50g / t of raw ore according to the feed amount; The selection process includes: the primary roughing concentrate is used as the feed material for the primary selection for blank selection to obtain the primary selection concentrate and the primary selection tailings; the primary selection tailings are returned to the primary roughing operation, and the primary selection concentrate is used as the feed material for the secondary selection for blank selection to obtain the secondary selection concentrate and the secondary selection tailings; the secondary selection tailings are returned to the primary selection operation.

[0054] The process diagram of the ore dressing method of lithium iron mica is as follows: Figure 1 shown.

[0055] Example 2 In a first aspect, the present embodiment provides a collector for flotation of ferrolithium mica, wherein the raw materials thereof, measured in parts by weight, include: 20 parts of oleic acid, 8 parts of sodium petroleum sulfonate, 7 parts of dodecylamine, 12 parts of acetic acid and 9 parts of ethanol.

[0056] The second aspect of the present embodiment provides a method for beneficiating lithodactite, which performs beneficiation treatment on a lithodactite ore (with a Li2O content of 0.46%), comprising the following beneficiation steps: (a) The mineral is ground into -0.074mm by ball mill with a content of 48% and then enters the hydrocyclone for desludging. The hydrocyclone pressure is 0.12Mpa, and the overflow with sedimentation and particle size ≤0.010mm is obtained; (b) The sand settling obtained in step (a) is slurried until the mass concentration of the obtained ore pulp is 23%; a strong magnetic machine is used for magnetic separation with a magnetic field strength of 1.8T to obtain a magnetic product and a non-magnetic product.

[0057] (c) slurrying the magnetic product obtained in step (b) until the mass concentration of the obtained slurry is 33%; sodium carbonate is added to adjust the pH value of the slurry to 8.7, and a collector is added for flotation to produce iron lithium mica concentrate and tailings; Among them, flotation includes: primary roughing includes: adding pH adjusting agent and collector to the pulp to float the lithium mica to obtain primary roughing concentrate and primary roughing tailings; the primary roughing tailings are used as feed for primary scavenging, and the primary roughing concentrate is used as feed for concentrating; according to the feed amount, the addition amount of adjusting agent is 350g / t of raw ore, and the addition amount of collector is 280g / t of raw ore; The primary scavenging process includes: adding a collector to the primary roughing tailings to float the lepidolite, obtaining a primary scavenging concentrate and tailings, and returning the primary scavenging concentrate to the primary roughing process; wherein, based on the feed rate, the amount of collector added is 60g / t of the original ore; The selection process includes: the primary roughing concentrate is used as the feed material for the primary selection for blank selection to obtain the primary selection concentrate and the primary selection tailings; the primary selection tailings are returned to the primary roughing operation, and the primary selection concentrate is used as the feed material for the secondary selection for blank selection to obtain the secondary selection concentrate and the secondary selection tailings; the secondary selection tailings are returned to the primary selection operation.

[0058] Example 3 The difference from Example 1 is that the raw materials of the collector used for flotation of iron lithium mica include, by weight: 18 parts of oleic acid, 10 parts of sodium petroleum sulfonate, 9 parts of dodecyl primary amine, 15 parts of glacial acetic acid and 10 parts of ethanol.

[0059] Comparative Example 1 The difference from Example 1 is that no cyclone desludging is performed, and the magnetic product obtained after the raw ore is ground and subjected to strong magnetic separation is directly subjected to flotation.

[0060] Comparative Example 2 The difference from Example 1 is that no strong magnetic separation is performed, and the sand obtained by desludging the raw ore after grinding is directly subjected to flotation.

[0061] Comparative Example 3 The difference from Example 1 is that oleic acid in the collector is replaced by oxidized paraffin soap, and the rest is the same as Example 1.

[0062] Comparative Example 4 The difference from Example 1 is that dodecylamine in the collector is replaced by an equal amount of octadecylamine, and the rest is the same as Example 1.

[0063] Comparative Example 5 The difference from Example 1 is that the glacial acetic acid in the collector used is replaced by an equal amount of hydrochloric acid, and the rest is the same as Example 1.

[0064] Comparative Example 6 The difference from Example 1 is that the ethanol in the collector is replaced by an equal amount of water, and the rest is the same as Example 1.

[0065] Comparative Example 7 The difference from Example 1 is that the sodium petroleum sulfonate in the collector is replaced by an equal amount of sodium dodecyl sulfate, and the rest is the same as Example 1.

[0066] Comparative Example 8 The difference from Example 1 is that oleic acid is not added to the collector used.

[0067] Comparative Example 9 The difference from Example 1 is that no dodecylamine is added to the collector used.

[0068] Comparative Example 10 The difference from Example 1 is that glacial acetic acid is not added to the collector used.

[0069] Comparative Example 11 The difference from Example 1 is that no ethanol is added to the collector used.

[0070] Comparative Example 12 The difference from Example 1 is that no sodium petroleum sulfonate is added to the collector used.

[0071] Comparative Example 13 The difference from Example 1 is that no sodium carbonate is added during flotation and the pH value of the pulp is 6.8.

[0072] Comparative Example 14 The difference from Example 1 is that sodium carbonate is added during flotation to adjust the pH value of the slurry to 10.

[0073] The Li2O content and Li2O recovery rate in the lepidolite concentrate of the above embodiment and the comparative example were detected and calculated as follows: Li2O content in lepidolite concentrate: tested using the method in industry standard YS / T 509.1-2008; Li2O recovery rate = (Li2O content in lithium mica concentrate × lithium mica concentrate yield) / (Li2O content in lithium mica ore × lithium mica ore yield) × 100%; The results are shown in Table 1.

[0074] Table 1 Content and recovery test

[0075] analyze: (1) It can be seen from Examples 1-3 that the Li2O content in the lepidolite concentrate obtained by the lepidolite beneficiation method of the present invention is ≥2.58%, and the Li2O recovery rate is >82.15%; (2) By comparing Example 1 with Comparative Example 1, it can be seen that since desliming is omitted in Comparative Example 1, the sludge has a greater impact on the flotation of ferrolithium mica, is more difficult to recover during the flotation operation, and the recovery rate of Li2O in the lepidolite concentrate decreases.

[0076] (3) By comparing Example 1 with Comparative Example 2, it can be seen that due to the omission of strong magnetic separation in Comparative Example 1, the grade and recovery rate of iron lithium mica in the flotation operation are reduced.

[0077] (4) Comparing Example 1 with Comparative Examples 3-7, it can be seen that in Comparative Example 3, oleic acid in the collector is replaced by oxidized paraffin soap, and the Li2O content and Li2O recovery rate in the obtained lithium mica concentrate are both lower than those in Example 1; in Comparative Example 4, dodecylamine in the collector is replaced by octadecylamine, and the Li2O content and Li2O recovery rate in the obtained lithium mica concentrate are both lower than those in Example 1; in Comparative Example 5, acetic acid in the collector is replaced by hydrochloric acid, and hydrochloric acid and dodecylamine are easy to react to form a complex, resulting in a decrease in the collecting performance of the collector, and the Li2O content and Li2O recovery rate in the obtained lithium mica concentrate are both lower than those in Example 1; in Comparative Example 6, ethanol in the collector is replaced by water, and the Li2O content and Li2O recovery rate in the obtained lithium mica concentrate are both lower than those in Example 1; in Comparative Example 7, sodium petroleum sulfonate in the collector is replaced by sodium dodecyl sulfate, and the concentrate is easily impurized, and the Li2O content and Li2O recovery rate in the obtained lithium mica concentrate are both lower than those in Example 1; (5) By comparing Example 1 with Comparative Examples 8-12, it can be seen that since the collector in Comparative Example 8 does not include oleic acid, the collecting performance of the collector is greatly reduced, which leads to a decrease in the Li2O content in the lithium mica concentrate and a decrease in the Li2O recovery rate; since the collector in Comparative Example 9 does not include dodecylamine, the collecting performance of the collector is greatly reduced, which leads to a decrease in the Li2O content in the lithium mica concentrate and a decrease in the Li2O recovery rate; since the collector in Comparative Example 10 does not include acetic acid, the solubility and dispersibility of dodecylamine in the collector deteriorates, which leads to a decrease in the Li2O content in the lithium mica concentrate and a decrease in the Li2O recovery rate; since the collector in Comparative Example 11 does not include ethanol, the collecting performance of the collector is reduced, which leads to a decrease in the Li2O content in the lithium mica concentrate and a decrease in the Li2O recovery rate; since the collector in Comparative Example 12 does not include sodium petroleum sulfonate, the collecting power is reduced, which leads to a decrease in the Li2O content in the lithium mica concentrate and a decrease in the Li2O recovery rate.

[0078] (6) By comparing Example 1 with Comparative Examples 13-14, it can be seen that since no sodium carbonate was added during flotation in Comparative Example 13, the pH value of the slurry was 6.8, and the foam was relatively brittle, which led to a decrease in the Li2O content in the lithium mica concentrate and a decrease in the Li2O recovery rate; since sodium carbonate was added during flotation in Comparative Example 14 to adjust the pH value of the slurry to 10, the foam was abundant, which led to a decrease in the Li2O content in the lithium mica concentrate.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0080] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the above claims, any one of the claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present application and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A collector for flotation of ferrolithium mica, characterized in that: The raw materials of the collector include, by weight: 10-30 parts of oleic acid, 5-15 parts of sodium petroleum sulfonate, 5-15 parts of dodecyl primary amine, 7-20 parts of glacial acetic acid and 8-15 parts of ethanol.

2. The collector for flotation of ferrolithium mica according to claim 1, characterized in that: The raw materials of the collector include, by weight: 15-30 parts of oleic acid, 5-10 parts of sodium petroleum sulfonate, 5-10 parts of dodecyl primary amine, 7-15 parts of glacial acetic acid and 8-10 parts of ethanol.

3. A method for beneficiating iron lithium mica, characterized in that: include: The iron-containing lithium mica mineral is subjected to cyclone classification to obtain sedimentary sand; The sediment is subjected to magnetic separation to obtain a magnetic product; The magnetic product is subjected to flotation to obtain iron lithium mica concentrate; The collector as claimed in claim 1 or 2 is used in the flotation process.

4. The method for beneficiating iron lithium mica according to claim 3, characterized in that: The fineness of the iron-containing lithium mica mineral is -0.074mm, accounting for 40%-60%.

5. The method for beneficiating iron lithium mica according to claim 3, characterized in that: At least one of the following conditions is met: A. the cyclone classification is performed at least once; B. The cyclone classification also produces an overflow, and the particle size of the solid particles contained in the overflow is ≤0.010 mm.

6. The method for beneficiating iron lithium mica according to claim 3, characterized in that: At least one of the following conditions is met: A. the magnetic separation is performed at least once; B. The magnetic field strength of the magnetic separation is 1T-1.8T.

7. The method for beneficiating iron lithium mica according to any one of claims 3 to 6, characterized in that: The flotation includes roughing, cleaning and scavenging; The flotation reagents used in the roughing process include the collector and the pH adjuster; The selection process is blank selection; The flotation reagent used in the sweeping process includes the collector.

8. The method for beneficiating iron lithium mica according to claim 7, characterized in that: At least one of the following conditions is met: A. The pH adjuster includes sodium carbonate and / or sodium bicarbonate; B. The pH value during the roughing process is greater than 7 and less than or equal to 9.

9. The method for beneficiating iron lithium mica according to claim 7, characterized in that: The amount of the collector used in the roughing process is 100 g / t to 600 g / t of raw ore; The amount of the collector used in the scavenging process is 50 g / t to 100 g / t of the original ore.

10. The method for beneficiating iron lithium mica according to claim 7, characterized in that: At least one of the following conditions is met: A. the roughing is performed at least once; B. The selection is performed at least twice; C. The scanning is performed at least once.

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