Cassiterite collecting agent and beneficiation method of associated cassiterite lithium-containing pegmatite

Abstract

The invention provides a cassiterite collecting agent and a beneficiation method for associated cassiterite lithium-containing pegmatite, and relates to the technical field of beneficiation. The cassiterite collecting agent is good in selectivity and weak in spodumene collecting capacity, gangue minerals such as fluorite, calcite, apatite and hornblende which are good in floatability can be removed in advance, the difficulty of subsequent spodumene flotation is lowered, and the quality of spodumene concentrate is improved. According to the beneficiation method of the cassiterite collecting agent, the cassiterite is subjected to flotation enrichment before spodumene flotation, meanwhile, fluorite, calcite, apatite, hornblende and other easily-floating gangue minerals influencing the spodumene concentrate grade are removed at the same time, the cassiterite is purified through a reselection method, cassiterite concentrate is obtained, and recovery of the cassiterite in pegmatite type ore is achieved. Impurities influencing the spodumene concentrate quality are removed in advance, the spodumene concentrate quality and recovery rate are improved, and economic benefits are greatly improved.

Description

Technical Field

[0001] The present application relates to the field of mineral processing technology, and in particular to a cassiterite collector and a mineral processing method for associated cassiterite lithium-containing pegmatite. Background Art

[0002] At present, coarse-grained cassiterite is generally recovered by gravity separation, while fine-grained cassiterite is mostly recovered by flotation followed by gravity separation. The flotation method generally requires the addition of inhibitors such as water glass and sodium fluorosilicate, followed by the addition of metal cation activators such as lead nitrate, and then the use of oleic acid, arsenic acid, phosphonic acid, and hydroxamic acid anions to flotate and collect cassiterite; or at a lower pH value, the use of collectors such as alkyl sulfonated succinic acid to flotate and recover cassiterite.

[0003] At present, there are two methods for recovering cassiterite from associated cassiterite-bearing lithium pegmatites. One is to recover cassiterite by gravity separation before spodumene flotation. This method requires more gravity separation equipment, with high equipment investment and difficulty in management. At the same time, more flushing water needs to be added during the gravity separation process, which affects the stability of subsequent spodumene flotation operations. The other is to recover cassiterite by gravity separation in spodumene flotation concentrate. Since a large amount of spodumene collector remains in the spodumene concentrate, the bridging effect of the collector causes spodumene to agglomerate with minerals such as cassiterite, which is easy to form table flotation during the shaking table gravity separation process, thereby affecting the recovery rate of cassiterite and the quality of the concentrate.

[0004] If the traditional method of flotation is used to recover cassiterite, cassiterite can only be recovered by flotation before spodumene flotation. However, the inhibitors, activators and collectors added in the conventional cassiterite flotation process all have different degrees of influence on the spodumene flotation.

[0005] In addition, lithium-containing pegmatites are often accompanied by floating gangues such as fluorite, calcite, apatite, and hornblende. Since a large amount of collectors are added during the flotation of spodumene, these floating gangues are easily captured and entered into the spodumene concentrate, thus affecting the quality of the spodumene concentrate. Summary of the invention

[0006] The purpose of the present application is to provide a cassiterite collector and a beneficiation method for associated cassiterite lithium-containing pegmatite, aiming to solve the above-mentioned problems.

[0007] To achieve the above objectives, the present application provides a cassiterite collector, comprising a first component, a second component, a third component, a fourth component and a fifth component; The first component is sodium fatty acid, and the carbon chain length of the sodium fatty acid is 14 to 22; the second component is sodium petroleum sulfonate and / or sodium dodecylbenzene sulfonate; the third component is cyclohexane acid; the fourth component is one or both of sodium polyoxyethylene ether sulfate and / or sodium dodecyl sulfate; and the fifth component is water.

[0008] In some embodiments, the cassiterite collector comprises, by mass percentage, 30% to 50% of a first component, 8% to 15% of a second component, 5% to 10% of a third component, 0.5% to 1% of a fourth component, and 20% to 40% of a fifth component.

[0009] The present application also provides a method for beneficiating associated cassiterite lithium-containing pegmatite, using the above-mentioned cassiterite collector, comprising: Grinding the cassiterite-containing lithium-containing pegmatite ore to obtain a slurry, wherein the pH value of the slurry is 8-10; Adding the cassiterite collector into the ore pulp to carry out cassiterite flotation to obtain cassiterite coarse concentrate and cassiterite flotation tailings; adding sodium carbonate to the cassiterite coarse concentrate to carry out cassiterite concentration to obtain cassiterite concentration foam and cassiterite concentration tailings; Reselecting the cassiterite concentrate foam to obtain tin concentrate; The cassiterite flotation tailings are subjected to spodumene flotation to obtain spodumene concentrate.

[0010] In some embodiments, the cassiterite flotation tailings are subjected to spodumene flotation, comprising: The cassiterite flotation tailings are mixed with sodium hydroxide and sodium carbonate to prepare a slurry, and then a spodumene activator and a spodumene collector are added and mixed to perform lithium roughing to obtain lithium flotation foam and lithium flotation underflow; The lithium flotation foam and sodium carbonate are mixed and then lithium concentration is performed three times to obtain spodumene concentrate and lithium concentration tailings; The lithium flotation underflow is mixed with a spodumene activator and a spodumene collector, and then lithium scavenging is performed 1-2 times to obtain scavenging foam and scavenging tailings.

[0011] In some embodiments, at least one of the following conditions is met: a. The mass percentage content of Sn in the lithium-containing pegmatite containing cassiterite is 0.02-0.3%; b. The grinding and screening of ore particles with a particle size less than or equal to 2 mm; c. The fineness of the solid materials in the slurry is below 0.074 mm, accounting for 50% to 80%; d. The slurry concentration is 30-35%; e. adding sodium carbonate during the grinding process; f. The amount of sodium carbonate used is 500-2000 g / t of raw ore.

[0012] In some embodiments, at least one of the following conditions is met: a. The cassiterite collector is formulated into an aqueous solution having a mass fraction of 5-15%; b. The cassiterite collector is used in an amount of 100-800g / t of ore; c. The cassiterite flotation time is 3-5min; d. The amount of sodium carbonate used each time in the cassiterite concentration is 100-500g / t of ore; e. The cassiterite is cleaned 1-2 times.

[0013] In some embodiments, the gravity selection includes spiral chute gravity selection and shaking table gravity selection, and the gravity selection includes: adding the cassiterite concentration foam into a spiral chute for first gravity separation to obtain a spiral chute concentrate and a spiral chute tailings; Adding the spiral chute concentrate to a shaking table for a second gravity separation to obtain the tin concentrate; The second re-election includes: Adding the spiral chute concentrate to a first shaking table for first shaking table gravity separation to obtain first shaking table concentrate, first shaking table middlings and first shaking table tailings; The first shaking table concentrate is added into a second shaking table for second shaking table gravity separation to obtain the tin concentrate.

[0014] In some embodiments, at least one of the following conditions is met: a. The stirring time of the stirring slurry is 5-30min, and the linear speed of the stirring impeller is 5.5-7.5m / s; b. In the lithium roughing step, the amount of sodium hydroxide used is 100-200g / t of raw ore; c. In the lithium roughing step, the amount of sodium carbonate used is 200-300g / t of raw ore; d. In the lithium roughing step, the spodumene activator is used in an amount of 100-400 g / t of raw ore; e. The spodumene collector is one or more of oleic acid, sodium oleate, oxidized paraffin soap, cyclopentane acid, and cyclopentane acid soap; f. The spodumene activator is one or both of calcium chloride and magnesium chloride; g. The lithium roughing time is 3-5min; h. The amount of the spodumene collector used in the lithium roughing step is 500-2000 g / t of raw ore.

[0015] In some embodiments, at least one of the following conditions is met: a. The amount of sodium carbonate used in the first lithium concentration step is 100-600g / t of raw ore; b. The amount of sodium carbonate used in the second lithium concentration step is 100-400g / t of raw ore; c. The amount of sodium carbonate used in the third lithium concentration step is 100-300g / t of raw ore.

[0016] In some embodiments, the number of lithium scanning is 2 times, and at least one of the following conditions is satisfied: a. The amount of spodumene collector used in the first lithium sweeping step is 100-500g / t of ore; b. The dosage of spodumene collector in the second lithium scavenging step is 50-200g / t of raw ore.

[0017] Compared with the prior art, the beneficial effects of this application include: The cassiterite collector provided in the present application has good selectivity and weak collection ability for spodumene. It can remove gangue minerals such as fluorite, calcite, apatite, and amphibole with good floatability in advance, thereby reducing the difficulty of subsequent spodumene flotation and improving the quality of spodumene concentrate.

[0018] The associated cassiterite lithium-containing pegmatite beneficiation method provided by the present application adopts the cassiterite collector of the present application, and the cassiterite is flotation-enriched before the spodumene flotation, and the fluorite, calcite, apatite, amphibole and other easy-floating gangue minerals that affect the grade of the spodumene concentrate are simultaneously removed, and then the density difference between cassiterite and other gangue minerals is utilized, and the cassiterite is purified by the method of gravity selection to obtain the cassiterite concentrate, and the recovery of cassiterite in the pegmatite type ore is realized. The associated cassiterite lithium-containing pegmatite beneficiation method of the present application can recycle cassiterite in the absence of an activator, and the impurities that affect the quality of the spodumene concentrate are removed in advance, thereby improving the quality and recovery rate of the spodumene concentrate and greatly improving the economic benefit. The associated cassiterite lithium-containing pegmatite beneficiation method of the present application also has the advantages of simple operation, stable process, low equipment investment and convenience for on-site production management. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is a schematic flow chart of the beneficiation method of associated cassiterite lithium-bearing pegmatite of the present application. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] In these examples, parts and percentages are by mass unless otherwise indicated.

[0025] "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.

[0026] "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).

[0027] The present application provides a cassiterite collector, comprising a first component, a second component, a third component, a fourth component and a fifth component; The first component is sodium fatty acid, and the carbon chain length of the sodium fatty acid is 14 to 22; the second component is sodium petroleum sulfonate and / or sodium dodecylbenzene sulfonate; the third component is cyclohexane acid; the fourth component is one or both of sodium polyoxyethylene ether sulfate and / or sodium dodecyl sulfate; and the fifth component is water.

[0028] Among them, the first component can be one or more of sodium fatty acids with a carbon chain length of 14, 15, 16, 17, 18, 19, 20, 21 or 22.

[0029] The cassiterite collector provided in the present application can capture cassiterite without an activator when the pH of the slurry is 8-10, and can simultaneously capture most of the fluorite, calcite, apatite, amphibole, etc., has a weak capture ability for spodumene and good selectivity, reduces the difficulty of subsequent spodumene flotation, and improves the quality of spodumene concentrate.

[0030] In some embodiments, the cassiterite collector comprises, by mass percentage, 30% to 50% of a first component, 8% to 15% of a second component, 5% to 10% of a third component, 0.5% to 1% of a fourth component, and 20% to 40% of a fifth component.

[0031] Among them, the mass percentage of the first component can be, for example, 30%, 35%, 40%, 45%, 50% or any value between 30% and 50%; the mass percentage of the second component can be, for example, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15% or any value between 8% and 15%; the mass percentage of the third component can be, for example, 5%, 6%, 7%, 8%, 9%, 10% or any value between 5% and 10%; the mass percentage of the fourth component can be, for example, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1% or any value between 0.5% and 1%; the mass percentage of the fifth component can be, for example, 20%, 25%, 30%, 35%, 40% or any value between 20% and 40%.

[0032] The present application also provides a method for beneficiating associated cassiterite lithium-bearing pegmatite, using the above-mentioned cassiterite collector, see Figure 1 ,include: S100: grinding the cassiterite-containing lithium-bearing pegmatite ore to obtain a pulp, wherein the pH value of the pulp is 8-10; S200: adding a cassiterite collector to the slurry to carry out cassiterite flotation to obtain cassiterite rough concentrate and cassiterite flotation tailings; S300: adding sodium carbonate to the cassiterite coarse concentrate to concentrate the cassiterite to obtain cassiterite concentrated foam and cassiterite concentrated tailings; S400: reselecting the cassiterite foam to obtain tin concentrate; S500: The cassiterite flotation tailings are subjected to spodumene flotation to obtain spodumene concentrate.

[0033] The beneficiation method for associated cassiterite-containing lithium pegmatite provided in the present application adopts the cassiterite collector of the present application to float and enrich the cassiterite before the flotation of spodumene, and at the same time, the fluorite, calcite, apatite, amphibole and other easily floating gangue minerals that affect the grade of the spodumene concentrate are removed at the same time, and then the density difference between cassiterite and other gangue minerals is utilized to purify the cassiterite by gravity separation to obtain cassiterite concentrate, thereby realizing the recovery of cassiterite in pegmatite-type ore.

[0034] The beneficiation method of the associated cassiterite lithium-bearing pegmatite of the present application can recover cassiterite without an activator, and at the same time removes impurities that affect the quality of spodumene concentrate in advance, thereby improving the quality and recovery rate of spodumene concentrate and greatly improving the economic benefits. The beneficiation method of the associated cassiterite lithium-bearing pegmatite of the present application also has the advantages of simple operation, stable process, low equipment investment, and convenience for on-site production management.

[0035] In step S100, the mass percentage content of Sn in the lithium-containing pegmatite containing cassiterite is 0.02-0.3%; after grinding, ore particles with a particle size less than or equal to 2 mm are screened; sodium carbonate is added during the grinding process, and the amount of sodium carbonate is 500-2000 g / t of raw ore, for example, it can be 500 g / t of raw ore, 600 g / t of raw ore, 700 g / t of raw ore, 800 g / t of raw ore, 900 g / t of raw ore, 1000 g / t of raw ore, 1200 g / t of raw ore, 1300 g / t of raw ore, 1500 g / t of raw ore, 1700 g / t of raw ore, 2000 g / t of raw ore or any value between 500 and 2000 g / t of raw ore.

[0036] The fineness of the solid material in the slurry obtained in step S100 is below 0.074 mm, accounting for 50% to 80%, for example, it can be 50%, 55%, 60%, 65%, 70%, 75%, 80% or any value between 50% and 80%, which is the mass percentage; the slurry concentration is 30-35%, for example, it can be 30%, 31%, 32%, 33%, 34%, 35% or any value between 30-35%, and the slurry concentration refers to the mass percentage of the solid material in the slurry to the total mass of the slurry.

[0037] The cassiterite collector used in step S200 is prepared into an aqueous solution with a mass fraction of 5-15%, for example, it can be 5%, 7%, 9%, 10%, 12%, 15% or any value between 5-15%; the amount of cassiterite collector is 100-800g / t of raw ore, for example, it can be 100g / t of raw ore, 200g / t of raw ore, 300g / t of raw ore, 400g / t of raw ore, 500g / t of raw ore, 600g / t of raw ore, 700g / t of raw ore or 800g / t of raw ore; the cassiterite flotation time is 3-5min.

[0038] In step S300, cassiterite is selected 1-2 times, and the amount of sodium carbonate used each time is 100-500 g / t of raw ore, for example, 100 g / t of raw ore, 200 g / t of raw ore, 300 g / t of raw ore, 400 g / t of raw ore or 500 g / t of raw ore.

[0039] The re-selection in step S400 includes spiral chute re-selection and shaking table re-selection, including: Adding cassiterite concentrating foam into the spiral chute for the first reselection to obtain spiral chute concentrate and spiral chute tailings; The spiral chute concentrate is added to the shaking table for the second gravity separation to obtain tin concentrate.

[0040] The second re-election includes: Adding the spiral chute concentrate to the first shaking table for first shaking table gravity separation to obtain first shaking table concentrate, first shaking table middlings and first shaking table tailings; The concentrate from the first shaking table is added to the second shaking table for second shaking table gravity separation to obtain tin concentrate.

[0041] In a preferred embodiment, the cassiterite flotation tailings are subjected to spodumene flotation in step S500, comprising: The cassiterite flotation tailings are mixed with sodium hydroxide and sodium carbonate to prepare a slurry, and then a spodumene activator and a spodumene collector are added and mixed to perform lithium roughing to obtain lithium flotation foam and lithium flotation underflow; The lithium flotation foam and sodium carbonate are mixed and then lithium concentration is performed three times to obtain spodumene concentrate and lithium concentration tailings; The lithium flotation underflow is mixed with a spodumene activator and a spodumene collector and then subjected to 1-2 lithium scavenging operations to obtain scavenging foam and scavenging tailings.

[0042] In some embodiments, the stirring time of the stirring and slurry mixing is 5-30 min, and the linear speed of the stirring impeller is 5.5-7.5 m / s.

[0043] In some embodiments, in the lithium roughing step, the amount of sodium hydroxide used is 100-200 g / t of raw ore; the amount of sodium carbonate used is 200-300 g / t of raw ore; and the amount of spodumene activator used is 100-400 g / t of raw ore.

[0044] In some embodiments, the spodumene collector is one or more of oleic acid, sodium oleate, oxidized paraffin soap, cyclopentane acid, and cyclopentane acid soap; the spodumene activator is one or both of calcium chloride and magnesium chloride.

[0045] In some embodiments, the lithium roughing time is 3-5 minutes.

[0046] In some embodiments, the amount of spodumene collector used in the lithium roughing step is 500-2000 g / t of raw ore.

[0047] In some embodiments, the amount of sodium carbonate used in the first lithium concentration step is 100-600 g / t of raw ore; the amount of sodium carbonate used in the second lithium concentration step is 100-400 g / t of raw ore; and the amount of sodium carbonate used in the third lithium concentration step is 100-300 g / t of raw ore.

[0048] In some embodiments, the lithium scavenging is performed twice, and the amount of spodumene collector used in the first lithium scavenging step is 100-500 g / t of original ore; the amount of spodumene collector used in the second lithium scavenging step is 50-200 g / t of original ore.

[0049] 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 in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0050] Example 1 Example 1 First, a new cassiterite collector is provided, including a first component of 18C sodium oleate, a second component of sodium dodecylbenzene sulfonate, a third component of cyclohexane acid, a fourth component of sodium polyoxyethylene ether sulfate, and a fifth component of water, which are prepared into a paste in a mass ratio of 48:9:10:0.5:32.5, and the new cassiterite collector is prepared into an aqueous solution with a mass fraction of 5-15% for use.

[0051] Example 1 also provides a beneficiation method for associated tin-containing lithium pegmatite, which is used for beneficiation of associated tin-containing lithium pegmatite. The associated tin-containing lithium pegmatite ore contains, by mass percentage, 0.08% Sn, 1.2% Li2O, and 1.8% apatite, hornblende and other easy-floating gangue. The beneficiation method comprises the following steps: S1. Grind the lithium-containing pegmatite ore with associated tin to obtain a slurry with a solid material fineness of less than 0.074 mm accounting for 60% and a slurry concentration of 33% for cassiterite roughing operation.

[0052] S2, cassiterite flotation and flotation removal of easily floatable minerals: 200 g / t of new cassiterite collector is added to the slurry obtained in S1 as a collector for cassiterite and easily floatable gangue. After sufficient stirring, cassiterite and easily floatable gangue minerals are flotated to obtain cassiterite rough concentrate and cassiterite flotation tailings. S3, cassiterite coarse concentrate selection: add 200 g / t sodium carbonate of raw ore to the flotation foam obtained in S2 and stir it thoroughly; then carry out cassiterite selection I, the flotation foam enters selection II operation, and the flotation underflow is merged into the tailings. Add 100 / t sodium carbonate of raw ore to selection II operation and stir it thoroughly, then carry out cassiterite selection II, obtain selection II foam product, and the underflow of selection II returns to selection I operation.

[0053] S4, feeding the concentrated II foam obtained in S3 into the spiral chute gravity separation operation to obtain the spiral chute concentrate and spiral chute tailings, and the spiral chute tailings are incorporated into the total tailings.

[0054] S5. Feed the spiral chute concentrate described in step S4 to the shaking table gravity separation operation I to obtain shaking table I concentrate, shaking table I middlings and shaking table I tailings. The shaking table I middlings are returned to the spiral chute gravity separation operation, and the shaking table I tailings are incorporated into the total tailings.

[0055] S6. Feed the shaking table I concentrate described in step S5 to the shaking table gravity separation II operation to obtain tin concentrate, shaking table II middlings and shaking table II tailings. The shaking table II middlings are returned to the shaking table gravity separation I operation, and the shaking table II tailings are incorporated into the total tailings.

[0056] S7, adding adjusting agents sodium hydroxide and sodium carbonate to the cassiterite flotation tailings described in step S2, stirring and slurrying, then adding an activator magnesium chloride and stirring, then adding a spodumene collector, stirring and performing lithium roughing, the flotation time is 3-5min, the flotation foam enters the selection operation, and the flotation underflow enters the lithium scavenging operation; S8, lithium concentration: add sodium carbonate as a regulator to the flotation foam in S7, conduct lithium concentration three times, obtain spodumene concentrate, and return the concentrated tailings to the previous operation in sequence; S9. Lithium scavenging: Add magnesium chloride as an activator to the flotation underflow obtained in S7, and then add spodumene collector, stir and carry out 1-2 lithium scavengings. The scavenging foam returns to the previous operation in sequence, and the scavenging underflow is tailings.

[0057] The tin concentrate obtained in Example 1 contained 55.50% SnO2, with a tin recovery rate of 39.85%, and the spodumene concentrate contained 5.86% Li2O, with a Li2O recovery rate of 87.58%. The contents of impurities P2O5 and Fe were 0.08% and 0.09%, respectively.

[0058] Example 2 The difference between Example 2 and Example 1 is that the lithium-containing pegmatite ore with associated tin in Example 2 contains, by mass percentage, 0.03% SnO2, 1.03% Li2O, and 3.1% easily floating gangue minerals (mainly fluorite and apatite).

[0059] Example 2 adopts the same experimental scheme as Example 1 to obtain a tin concentrate containing 42.40% SnO2, a lithium concentrate containing 5.43% Li2O, a tin recovery rate of 35.34%, a lithium recovery rate of 83.58%, and the contents of impurities P2O5 and CaF2 in the spodumene concentrate are 0.05% and 0.06%, respectively.

[0060] Example 3 The difference between Example 3 and Example 1 is that the lithium-containing pegmatite ore of the associated tin in Example 3 contains 0.04% SnO2, 1.12% Li2O, and 2.9% buoyant gangue minerals (mainly amphibole and apatite) by mass percentage. The new cassiterite collector of Example 3 includes a first component of 18C and 20C sodium oleate, a second component of sodium petroleum sulfonate, a third component of cyclohexane acid, a fourth component of sodium dodecyl sulfate, and a fifth component of water, which are prepared into a paste in a mass ratio of 43:12:8:0.6:36.4, and the new cassiterite collector is prepared into an aqueous solution with a mass fraction of 5-15% for use.

[0061] Example 3 adopts the same experimental scheme as Example 1 in the remaining steps to obtain a tin concentrate containing SnO241.55%, a lithium concentrate containing Li2O 5.36%, a tin recovery rate of 36.54%, a lithium recovery rate of 82.11%, and the contents of impurities P2O5 and Fe in the spodumene concentrate are 0.08% and 0.18%, respectively.

[0062] Comparative Example 1 Comparative Example 1 provides a method for beneficiating lithium-containing pegmatite associated with cassiterite, which is different from Example 1 in that spodumene flotation is directly performed without pre-floating cassiterite, and cassiterite is recovered by gravity selection from the spodumene flotation concentrate, and the gravity selection process is the same as that of Example 1. The spodumene flotation process is the same as that of Example 1, and will not be repeated.

[0063] The spodumene concentrate obtained in Comparative Example 1 contained 5.43% Li2O, a Li2O recovery rate of 85.44%, a cassiterite concentrate grade of 55.98%, a tin recovery rate of 38.33%, and the contents of impurities P2O5 and Fe were 0.18% and 0.21%, respectively.

[0064] It is illustrated that the cassiterite concentrate recovery rate obtained by the present application scheme in Example 1 is high and the quality and recovery rate of the spodumene concentrate are greatly improved.

[0065] Comparative Example 2 Comparative Example 2 provides a method for beneficiating lithium-containing pegmatite associated with cassiterite, which is different from Example 2 in that spodumene flotation is performed directly without pre-floating cassiterite, and cassiterite is recovered by gravity selection from the spodumene flotation concentrate, and the gravity selection process is the same as that of Example 1. The spodumene flotation process is the same as that of Example 1 and will not be described in detail.

[0066] The tin concentrate obtained in Comparative Example 2 contained 42.68% SnO2, the lithium concentrate contained 5.04% Li2O, the tin recovery rate was 34.66%, the lithium recovery rate was 82.16%, and the contents of impurities P2O5 and CaF2 in the spodumene concentrate were 0.25% and 0.79%, respectively.

[0067] It can be seen that by using the reagents and mineral processing methods provided in this application, a tin concentrate with a better grade is obtained compared with the conventional scheme, the grade of the lithium concentrate is 0.39 percentage points higher, and the recovery rate is increased by 1.42 percentage points.

[0068] Comparative Example 3 Comparative Example 3 provides a method for beneficiating lithium-containing pegmatite associated with cassiterite, which is different from Example 3 in that spodumene flotation is performed after cassiterite is selected by a conventional cassiterite flotation method, and the cassiterite reselection process is similar to that of Example 3. The spodumene flotation process is the same as that of Example 1 and will not be described in detail.

[0069] The tin concentrate obtained in Comparative Example 3 contains 36.55% SnO2, the lithium concentrate contains 4.58% Li2O, the tin recovery rate is 35.76%, the lithium recovery rate is 76.10%, and the contents of impurities P2O5 and Fe in the spodumene concentrate are 0.22% and 0.89%, respectively.

[0070] It can be seen that by using the reagents and mineral processing methods provided in this application, a tin concentrate with a better grade is obtained compared with the conventional scheme, the grade of the lithium concentrate is 0.76 percentage points higher, and the recovery rate is increased by 6.01 percentage points.

[0071] 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.

[0072] 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 cassiterite collector, characterized in that: comprising a first component, a second component, a third component, a fourth component and a fifth component; The first component is sodium fatty acid, and the carbon chain length of the sodium fatty acid is 14 to 22; the second component is sodium petroleum sulfonate and / or sodium dodecylbenzene sulfonate; the third component is cyclohexane acid; the fourth component is one or both of sodium polyoxyethylene ether sulfate and / or sodium dodecyl sulfate; and the fifth component is water.

2. The cassiterite collector according to claim 1, characterized in that In terms of mass percentage, the cassiterite collector comprises: a first component of 30% to 50%, a second component of 8% to 15%, a third component of 5% to 10%, a fourth component of 0.5% to 1% and a fifth component of 20% to 40%.

3. A method for beneficiating associated cassiterite lithium-bearing pegmatite, characterized in that: The cassiterite collector according to claim 1 or 2 comprises: Grinding the cassiterite-containing lithium-containing pegmatite ore to obtain a slurry, wherein the pH value of the slurry is 8-10; Adding the cassiterite collector into the ore pulp to carry out cassiterite flotation to obtain cassiterite coarse concentrate and cassiterite flotation tailings; adding sodium carbonate to the cassiterite coarse concentrate to carry out cassiterite concentration to obtain cassiterite concentration foam and cassiterite concentration tailings; Reselecting the cassiterite concentrate foam to obtain tin concentrate; The cassiterite flotation tailings are subjected to spodumene flotation to obtain spodumene concentrate.

4. The method for beneficiation of associated cassiterite lithium-bearing pegmatite according to claim 3, characterized in that: The cassiterite flotation tailings are subjected to flotation, comprising: The cassiterite flotation tailings are mixed with sodium hydroxide and sodium carbonate to prepare a slurry, and then a spodumene activator and a spodumene collector are added and mixed to perform lithium roughing to obtain lithium flotation foam and lithium flotation underflow; The lithium flotation foam and sodium carbonate are mixed and then lithium concentration is performed three times to obtain spodumene concentrate and lithium concentration tailings; The lithium flotation underflow is mixed with a spodumene activator and a spodumene collector, and then lithium scavenging is performed 1-2 times to obtain scavenging foam and scavenging tailings.

5. The method for beneficiation of associated cassiterite lithium-bearing pegmatite according to claim 3, characterized in that: At least one of the following conditions is met: a. The mass percentage content of Sn in the lithium-containing pegmatite containing cassiterite is 0.02-0.3%; b. The grinding and screening of ore particles with a particle size less than or equal to 2 mm; c. The fineness of the solid materials in the slurry is below 0.074 mm, accounting for 50% to 80%; d. The slurry concentration is 30-35%; e. adding sodium carbonate during the grinding process; f. The amount of sodium carbonate used is 500-2000 g / t of raw ore.

6. The method for beneficiation of associated cassiterite lithium-bearing pegmatite according to claim 3, characterized in that: At least one of the following conditions is met: a. The cassiterite collector is formulated into an aqueous solution having a mass fraction of 5-15%; b. The cassiterite collector is used in an amount of 100-800g / t of ore; c. The cassiterite flotation time is 3-5min; d. The amount of sodium carbonate used each time in the cassiterite concentration is 100-500g / t of ore; e. The cassiterite is cleaned 1-2 times.

7. The beneficiation method of associated cassiterite lithium-bearing pegmatite according to claim 3, characterized in that: The gravity selection includes spiral chute gravity selection and shaking table gravity selection, and the gravity selection includes: adding the cassiterite concentration foam into a spiral chute for first gravity separation to obtain a spiral chute concentrate and a spiral chute tailings; adding the spiral chute concentrate to a shaking table for a second gravity separation to obtain the tin concentrate; The second re-election includes: Adding the spiral chute concentrate to a first shaking table for first shaking table gravity separation to obtain first shaking table concentrate, first shaking table middlings and first shaking table tailings; The first shaking table concentrate is added into a second shaking table for second shaking table gravity separation to obtain the tin concentrate.

8. The method for beneficiating associated cassiterite lithium-bearing pegmatite according to claim 4, characterized in that: At least one of the following conditions is met: a. The stirring time of the stirring slurry is 5-30min, and the linear speed of the stirring impeller is 5.5-7.5m / s; b. In the lithium roughing step, the amount of sodium hydroxide used is 100-200g / t of raw ore; c. In the lithium roughing step, the amount of sodium carbonate used is 200-300g / t of raw ore; d. In the lithium roughing step, the spodumene activator is used in an amount of 100-400 g / t of raw ore; e. The spodumene collector is one or more of oleic acid, sodium oleate, oxidized paraffin soap, cyclopentane acid, and cyclopentane acid soap; f. The spodumene activator is one or both of calcium chloride and magnesium chloride; g. The lithium roughing time is 3-5min; h. The amount of the spodumene collector used in the lithium roughing step is 500-2000 g / t of raw ore.

9. The method for beneficiating associated cassiterite lithium-bearing pegmatite according to claim 4, characterized in that: At least one of the following conditions is met: a. The amount of sodium carbonate used in the first lithium concentration step is 100-600g / t of raw ore; b. The amount of sodium carbonate used in the second lithium concentration step is 100-400g / t of raw ore; c. The amount of sodium carbonate used in the third lithium concentration step is 100-300g / t of raw ore.

10. The method for beneficiating associated cassiterite lithium-bearing pegmatite according to claim 4, characterized in that: The number of lithium scanning is 2 times, and at least one of the following conditions is met: a. The amount of spodumene collector used in the first lithium sweeping step is 100-500g / t of ore; b. The dosage of spodumene collector in the second lithium scavenging step is 50-200g / t of raw ore.

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