Spodumene flotation collector and spodumene ore beneficiation method

Abstract

The present invention provides a spodumene flotation collector and a spodumene ore beneficiation method. The spodumene collector comprises the following components by weight: 55-75 parts of oxidized paraffin soap, 5-20 parts of naphthenic acid soap, 5-20 parts of oleic acid, 5-15 parts of sodium hydroxide, and 1-5 parts of sodium humate. The spodumene collector has a simple configuration and strong synergistic properties. It can efficiently capture spodumene minerals even in low-temperature and high-alkaline environments. It also has the advantages of fast spodumene flotation rate and high selectivity. The spodumene ore beneficiation method can significantly improve flotation phenomena and achieve efficient recovery of spodumene minerals. The process is simple and suitable for industrial production, providing a reference for the construction of similar spodumene mines.

Description

Technical Field

[0001] The present invention relates to the field of spodumene flotation, in particular to a spodumene flotation collector and a spodumene ore beneficiation method. Background Art

[0002] Spodumene is commonly found in pegmatite salt ores. Affected by weathering and erosion, the ore surface is easily muddied. Depending on the crystal size of the spodumene minerals in the ore, gravity separation or flotation is usually used to recover spodumene. The crystal structure of co-existing minerals such as feldspar and quartz is similar to the surface properties of spodumene, making flotation separation difficult. The "three alkalis and two soaps" reagent system is a common method for flotation of spodumene. In this process, how to control the CO3 in the flotation slurry system for spodumene ore with specific properties is a key issue. 2- OH - The relative contents of calcium and magnesium ions, as well as the effective removal of slime before flotation, have a great influence on the quality of spodumene flotation concentrate.

[0003] At present, fatty acid collectors are commonly used in spodumene flotation systems, such as "two soaps", namely oxidized paraffin soap and cyclohexane acid soap. They are usually used alone or in combination. Such collectors often have poor selectivity and require a large amount of reagents. Based on this, many studies have shown that adding "three alkalis" (NaOH, Na2CO3, Na2S) to mix the pulp before flotation can effectively solve the problem of low grade of spodumene concentrate. Based on past production experience, since single anionic and cationic collectors often cannot meet the requirements of selectivity and recovery rate, it is difficult to achieve effective separation of useful minerals and gangue minerals. The combination of two or more flotation reagents can usually achieve better flotation indicators. Therefore, the study of combined reagents has gradually become a new direction in spodumene flotation research.

[0004] The Chinese patent application with publication number CN109174438B discloses a spodumene ore dressing and separation process, which belongs to the field of multi-metallic ore dressing technology, comprising: (1) grinding the raw ore using the SAB crushing process; (2) pre-floating the ground ore using the CCF flotation column to obtain pre-floated coarse ore; (3) flotating the pre-floated coarse ore using a one-roughing, three-fine, three-sweeping process, and using oxidized paraffin soap, sulfonated soap and cyclohexane acid soap as a mixed collector in the coarse separation process; (4) solid-liquid separation of the flotation tailings; (5) removing impurities from the spodumene after flotation using a slag screen + magnetic separation + acidic impurity removal process to obtain lithium concentrate. In step (3), the reagent system of the roughing operation is as follows: the adjusting agent is sodium carbonate 100-350g / t, sodium hydroxide 400-550g / t, oxidized paraffin soap, sulfonated soap, and naphthenic acid soap are prepared into a mixed collector in a mass ratio of (45-55%): (25-30%): (15-25%), the collector dosage is 1000-1500g / t, and the roughing time is 5-10min. The invention adopts the SAB crushing process + CCF flotation column pre-flotation + spodumene flotation + concentrate impurity removal process. When the raw ore grade is 1.0%-1.5%, the spodumene concentrate recovery rate can be achieved at 80%-85%, the grade is 5.5%-6.0%, and the ferric oxide content in the concentrate is less than 0.3%. The process can provide guidance for the production of similar mines. The Chinese patent with publication number CN109174438B requires a pre-flotation operation before spodumene flotation. During this process, a large amount of sodium carbonate needs to be added for flotation slurry adjustment to separate the ore slime from the original ore. At the same time, the ore slime is difficult to be effectively removed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a spodumene flotation collector to achieve efficient collection of spodumene minerals.

[0006] The present invention also provides a pyroxene ore beneficiation method to achieve efficient recovery of spodumene minerals.

[0007] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0008] A spodumene flotation collector comprises oxidized paraffin soap, cyclohexane acid soap and sodium hydroxide, wherein the oxidized paraffin soap is 55-75 parts by mass, the cyclohexane acid soap is 5-20 parts by mass, the sodium hydroxide is 5-15 parts by mass, and the collector further comprises the following components by mass: 5-20 parts by mass of oleic acid and 1-5 parts by mass of sodium humate.

[0009] Each component of the present invention is indispensable. The mass ratio of each component of the collector in the present invention is conducive to improving the grade and recovery rate of lithium concentrate. When the ratio of sodium humate is too large, the recovery rate of lithium concentrate is significantly reduced, indicating that excessive sodium humate will inhibit spodumene mineralization. Adding a small amount of sodium humate can effectively improve the flotation separation effect.

[0010] Naphthenic acid soap is a general term for metal naphthenic acid salts, including one or more of sodium naphthenate, calcium naphthenate, cobalt naphthenate, lead naphthenate, aluminum naphthenate, manganese naphthenate, copper naphthenate, and zinc naphthenate.

[0011] In one preferred embodiment, the spodumene flotation collector comprises the following components in parts by weight: 60-75 parts of oxidized paraffin soap, 5-15 parts of cyclohexane acid soap, 5-8 parts of sodium hydroxide, 10-20 parts of oleic acid, and 2-5 parts of sodium humate.

[0012] In one preferred embodiment, the oxidized paraffin soap comprises the following components in weight percentage: hydroxy acid content ≤15%, carboxyl acid content ≥35%, free alkali ≤1%, moisture ≤30%, and unsaponifiable matter ≤15%.

[0013] In one preferred embodiment, water is used as the solvent, and the mass concentration of the spodumene flotation collector is 3-7%.

[0014] Preferably, the mass concentration of the spodumene flotation collector is 3-5%.

[0015] Thus, the collector of the present invention has strong stability, the agent solution is clear, and it does not delaminate after being placed for a long time. Thus, the agent has good uniformity, which is conducive to the full adsorption of the collector on the surface of the spodumene mineral.

[0016] Preferably, the heating and stirring time is 5 to 20 minutes.

[0017] The present invention also discloses a spodumene ore beneficiation method, comprising the following steps:

[0018] S1. Wet ball milling the raw ore to obtain ore pulp;

[0019] S2, physically desludging the slurry in S1;

[0020] S3: The deslimed pulp in S2 is slurried by adding 400-1000 g / t of sodium carbonate, 200-700 g / t of sodium hydroxide, 50-200 g / t of activator, and 1000-1400 g / t of spodumene flotation collector in succession, stirring, and flotation.

[0021] By adopting the method of the present application, sodium carbonate or sodium hydroxide may not be added to the ball mill in S1 in the conventional way to enhance the interaction between the mineral and the reagent, which simplifies the installation of the reagent pipeline and the reagent transportation in industrial applications and is beneficial to the subsequent physical desludging operation.

[0022] Compared with other existing technologies, the dosage of the adjusting agent sodium carbonate in the present application is significantly reduced, and the flotation time is short.

[0023] Most of the fine mud in the original ore is removed in S2.

[0024] Preferably, 400-500 g / t of sodium carbonate, 200-500 g / t of sodium hydroxide, 50-100 g / t of activator, and 1000-1200 g / t of spodumene collector are added to S3 in sequence and stirred.

[0025] In one preferred embodiment, the concentration of the ore pulp after desliming in S2 is 26-30%.

[0026] In one preferred embodiment, sodium carbonate is added to S3 and stirred for 5 to 10 minutes, sodium hydroxide is added and stirred for 10 to 20 minutes, an activator is added and stirred for 1 to 3 minutes, and finally a spodumene collector is added and stirred for 3 to 5 minutes.

[0027] In one preferred embodiment, after slurry adjustment in S3, the pH of the slurry is 11-13, and the slurry temperature is 5-15°C.

[0028] In one preferred embodiment, after flotation in S3, spodumene concentrate is obtained through a closed-circuit process of one roughing selection, two cleaning selections, and one scavenging selection.

[0029] In one preferred embodiment, in S3, the primary roughing time is 3 to 4 minutes, and the scraped foam is the coarse concentrate; in the primary concentration stage, 0.1 to 200 g / t of sodium carbonate is added to the slurry, and the concentration time is 2 to 4 minutes. The primary concentration foam continues to undergo a secondary concentration operation, and the secondary concentration foam is the final concentrate.

[0030] Preferably, the selected tailings are sequentially returned to the previous level of operation; the roughing tailings are subjected to a scavenging operation, 200-500g / t spodumene flotation collector is added during the scavenging slurry mixing stage, the scavenging time is 2-3min, the scavenging foam is returned to the roughing, and the scavenging tailings are the final tailings.

[0031] Preferably, the ore slime content in the raw ore is 10-20%.

[0032] Preferably, the Li2O grade in the raw ore is about 1-3%, and the main mineral composition and content of the raw ore are: spodumene 10-15%, quartz 30-35%, albite 30-35%, potassium feldspar 5-10%, muscovite 10-15%, and biotite 1-4%.

[0033] Preferably, Li2O in the raw ore is mainly distributed in spodumene, feldspar and mica minerals, accounting for 80-85%, 8-15% and 7-15% respectively, among which the Li2O grade in spodumene is 7-9%.

[0034] Preferably, the -2 mm raw ore in S1 is wet ball-milled to obtain a slurry containing 65-75% -0.074 mm mineral particles.

[0035] Preferably, the Li2O grade of the spodumene concentrate is ≥5.5%, and the recovery rate is ≥80%.

[0036] Preferably, the activator in S3 comprises magnesium chloride.

[0037] Preferably, the flotation in S3 is aeration flotation, and the flotation time is 3 to 7 minutes.

[0038] The reason why the Chinese patented slime is difficult to be effectively removed is that it is difficult to effectively remove the slime in a highly alkaline environment. 3 The low specific gravity of silicate slime allows for physical desliming through hydrocyclones. This not only reduces the investment required for additional flotation columns or flotation cells, as well as the subsequent reagent costs, but also facilitates equipment functionality. Compared to flotation desliming, lithium oxide losses in the hydrocyclone overflow are lower, and the amount of desliming can be easily controlled. The addition of sodium carbonate and an excessively high pH are avoided, ensuring effective desliming.

[0039] Chinese patent application publication number CN107899754B discloses a copper-sulfur separation flotation method. The inhibitor composition (XKY-03) consists of the following components in weight percentage: 55-70% sodium humate, 20-35% potassium permanganate, and 5-10% sodium thioglycolate. This patent uses a large amount of sodium humate. Compared to Chinese patent publication number CN107899754B, the amount of sodium humate used in this patent must be controlled within a lower range to effectively inhibit silicate minerals such as quartz and feldspar. This inhibitor can complex with calcium and magnesium ions on the mineral surface, reducing the number of active sites on the surface, making it difficult for collector molecules to act on the mineral surface. Excessive use of sodium humate can reduce the recovery rate of spodumene.

[0040] An analysis of existing technologies shows that the key factors for the flotation of spodumene ore are: (1) selecting a highly selective and efficient combined collector; (2) effectively removing the ore slime before flotation; and (3) adding an appropriate amount of adjusting agent during the flotation slurry adjustment stage. In addition, the flotation effect of spodumene ore is greatly affected by the local water quality and water temperature. The present invention is particularly suitable for application in a high-altitude area in Sichuan, where the spodumene ore has a high mud content, the flotation water temperature is low, and the water quality is relatively soft. It can achieve effective recovery of spodumene minerals and obtain high-grade spodumene concentrate, which has a reference value for the flotation of spodumene ores with similar properties.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] (1) The collector of the present invention has a wide range of raw material sources and a simple reagent configuration. The combined collector can be firmly adsorbed on the surface of spodumene minerals, resulting in a solid flotation foam with good foam fluidity, a fast flotation rate of spodumene minerals, and a short flotation time. Aiming at the characteristics of spodumene mines in high-altitude areas, the collector can achieve efficient collection of spodumene minerals under low temperature and high alkaline conditions.

[0043] (2) This spodumene ore beneficiation method can significantly improve the flotation phenomenon of spodumene ore with high ore slime content, achieve efficient recovery of spodumene minerals, and use a low amount of adjusting agent. At the same time, it can reduce the reagent action time and flotation time. This method effectively improves the ore processing capacity per unit time of the flotation machine, has a simple process, and is suitable for industrial production applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the process flow of applying the collector provided by the present invention (codenamed CFLH-18) to spodumene ore beneficiation. DETAILED DESCRIPTION

[0045] In the specific embodiment of the present invention, the actual information of some of the drugs involved is as follows:

[0046] Oxidized paraffin soap: Manufacturer: China Science Chemical New Materials;

[0047] Cyclohexane acid soap: Manufacturer: Hubei Yamade Biopharmaceutical Co., Ltd.

[0048] Example 1

[0049] The spodumene ore in this example is a low-grade spodumene mine in Jinchuan County, Sichuan Province. The ore has a high ore slime content of about 15%. The ore has a Li2O grade of about 1.2%. The main mineral composition and content of the ore are: spodumene 13.65%, quartz 31.92%, albite 31.33%, potassium feldspar 8.85%, muscovite 10.31%, and biotite 2.14%. The Li2O in the ore is mainly distributed in spodumene, feldspar, and mica minerals, accounting for 82.72%, 9.76%, and 7.37%, respectively. The Li2O grade in spodumene is 7.16%.

[0050] In this embodiment, CFLH-18 is prepared from the following components by weight: 65 parts oxidized paraffin soap, 15 parts naphthenic acid soap, 10 parts oleic acid, 8 parts sodium hydroxide, and 2 parts sodium humate. Water is added and heated and stirred for 10 minutes to prepare a 5% collector solution.

[0051] The process flow and reagent system in this embodiment are as follows Figure 1 As shown, the specific steps are:

[0052] (1) The -2mm ore is wet ball milled to control the grinding fineness to -0.074mm, accounting for 65%, and then the slurry is physically deslimed.

[0053] (2) The deslimed slurry was poured into a flotation cell for pre-flotation slurry adjustment. The slurry concentration was 28%. The slurry adjustment steps were as follows: 500 g / t sodium carbonate was added to the flotation cell and stirred for 10 minutes; 500 g / t sodium hydroxide was added and stirred for 20 minutes; 100 g / t magnesium chloride was added and stirred for 3 minutes; and 1200 g / t CFLH-18 was added and stirred for 5 minutes. After slurry adjustment, the pH was measured to be 12.2 and the slurry temperature was 8.9°C.

[0054] (3) After slurry preparation, aeration flotation was performed for 4 minutes to obtain lithium coarse concentrate and rougher tailings. The rougher tailings were subjected to scavenging operation. First, 300g / t CFLH-18 was added and stirred for 3 minutes before flotation for 2 minutes to obtain scavenging concentrate and final tailings. The scavenging concentrate was returned to the rougher operation.

[0055] (4) The lithium crude concentrate is subjected to two concentration operations, wherein the concentration operation 1 is performed by adding 100 g / t sodium carbonate, stirring for 2 minutes, and flotation for 3 minutes to obtain the concentration operation 1 foam and the concentration operation 1 tailings; the concentration operation 2 is performed on the concentration operation 1 foam, and the concentration operation 2 is blank concentration (without adding any reagents), slurry mixing and stirring for 2 minutes, and flotation for 3 minutes to obtain the final concentrate and the concentration operation 2 tailings, and the concentration tailings are returned to the previous operation step by step.

[0056] The flotation results of this embodiment are shown in Table 1. In this embodiment, CFLH-18 was used as the collector for the spodumene ore, and the Li2O grade of the obtained concentrate was 5.63%, the recovery rate was 80.62%, and the concentrate quality reached the second grade.

[0057] Table 1 Flotation results of Example 1

[0058] product Yield / % <![CDATA[Li2O grade / %]]> <![CDATA[Li2O Recovery Rate / %]]> mud 14.20 0.75 8.96 concentrate 17.02 5.63 80.62 tailings 68.79 0.18 10.42 raw ore 100.00 1.19 100.00

[0059] Example 2

[0060] The process flow of this example is the same as that of Example 1, except that the raw ore sample is low-grade spodumene ore from the mining area described in Example 1, with a LiO grade of approximately 1.0% and a slime content of approximately 8%. This example investigates the effect of varying ore properties on the flotation performance of the collector of the present invention by varying the desludging yield and reagent dosage. The flotation test results are shown in Table 2.

[0061] Table 2 Flotation test results of Example 2

[0062] product Yield / % <![CDATA[Li2O grade / %]]> <![CDATA[Li2O Recovery Rate / %]]> mud 7.76 0.75 5.86 concentrate 15.85 5.03 80.30 tailings 76.39 0.18 13.85 raw ore 100.00 0.99 100.00

[0063] As shown in Table 2, when the ore grade decreases, the concentrate grade also decreases accordingly, but the recovery rate can still reach more than 80%, and the concentrate enrichment is relatively high, indicating that the collector of the present invention has good selective collection ability.

[0064] Example 3

[0065] The raw ore sample and process flow of this embodiment are the same as those of Example 1. The difference is that the distribution ratio of each reagent component in the spodumene combination collector is changed to prepare 1# to 3# combination collectors. The flotation effect of the collector under different reagent component distribution ratios is explored. The flotation test results are shown in Table 3.

[0066] 1# combined collector: 75 parts of oxidized paraffin soap, 5 parts of cyclohexane acid soap, 10 parts of oleic acid, 8 parts of sodium hydroxide, and 2 parts of sodium humate.

[0067] 2# combined collector: 60 parts of oxidized paraffin soap, 10 parts of cyclohexane acid soap, 20 parts of oleic acid, 8 parts of sodium hydroxide, and 2 parts of sodium humate.

[0068] 3# combined collector: 65 parts of oxidized paraffin soap, 15 parts of cyclohexane acid soap, 10 parts of oleic acid, 5 parts of sodium hydroxide, and 5 parts of sodium humate.

[0069] Table 3 Flotation test results of Example 3

[0070]

[0071] As shown in Table 3, closed-circuit flotation using the 1-3# combination of collectors yielded a concentrate with a Li2O grade of approximately 5.5% and a flotation recovery greater than 78%. This demonstrates that the present invention can achieve better concentrate performance by varying the relative contents of the reagent components within the specified range.

[0072] Comparative Example 1

[0073] This comparative example employed the same flotation process as Example 1, except that the oleic acid content of the spodumene collector was increased, while the oxidized paraffin soap content was decreased. The spodumene collector composition, by weight, was: 30 parts oxidized paraffin soap, 10 parts naphthenic acid soap, 50 parts oleic acid, 5 parts sodium hydroxide, and 5 parts sodium humate. This combined collector was designated CFLH-18A. The flotation test results are shown in Table 4.

[0074] Comparative Example 2

[0075] This comparative example employed the same flotation process as Example 1, except that the proportion of naphthenic acid soap in the spodumene collector was increased, while the proportion of oxidized paraffin soap was decreased. The spodumene collector composition, by weight, was: 30 parts oxidized paraffin soap, 50 parts naphthenic acid soap, 10 parts oleic acid, 5 parts sodium hydroxide, and 5 parts sodium humate. This combined collector was designated CFLH-18B. The flotation test results are shown in Table 4.

[0076] Comparative Example 3

[0077] This comparative example employed the same flotation process as Example 1, except that sodium humate was added to the spodumene collector. The spodumene collector composition, by weight, was: 60 parts oxidized paraffin soap, 10 parts naphthenic acid soap, 10 parts oleic acid, 10 parts oleic acid, 5 parts sodium hydroxide, and 15 parts sodium humate. This combined collector was designated CFLH-18C. The flotation test results are shown in Table 4.

[0078] Comparative Example 4

[0079] This comparative example employed the same flotation process as Example 1, except that the spodumene collector contained only four components, in the following proportions by weight: 80 parts oxidized paraffin soap, 10 parts oleic acid, 5 parts sodium hydroxide, and 5 parts sodium humate. This combined collector was designated CFLH-18D. The flotation test results are shown in Table 4.

[0080] Comparative Example 5

[0081] This comparative example employed the same flotation process as Example 1, except that the spodumene collector contained only four components, in the following proportions by weight: 75 parts oxidized paraffin soap, 15 parts naphthenic acid soap, 5 parts sodium hydroxide, and 5 parts sodium humate. This combined collector was designated CFLH-18E. The flotation test results are shown in Table 4.

[0082] Comparative Example 6

[0083] This comparative example employed the same flotation process as Example 1, except that the spodumene collector contained only four components: 70 parts oxidized paraffin soap, 15 parts naphthenic acid soap, 10 parts oleic acid, and 5 parts sodium hydroxide, in the following proportions by weight. This combined collector was designated CFLH-18F. The flotation test results are shown in Table 4.

[0084] Comparative Example 7

[0085] This comparative example uses the same flotation process as Example 1, except that a single oxidized paraffin soap is used as the spodumene collector. The flotation test results are shown in Table 4.

[0086] Comparative Example 8

[0087] This comparative example employed the same flotation process as Example 1, except that oxidized paraffin soap and naphthenic acid soap were used as spodumene collectors, with conventional addition methods employed, at concentrations of 1000 g / t and 200 g / t, respectively. The flotation test results are shown in Table 4.

[0088] Table 4 Flotation test results of Comparative Examples 1 to 8

[0089]

[0090]

[0091] It can be seen from the flotation test results of Comparative Examples 1 to 3 in Table 4 that when the oleic acid ratio or the naphthenic acid soap ratio in the spodumene collector is too high, the grade of the lithium concentrate decreases significantly. This is because the selectivity of oleic acid and naphthenic acid soap is weak, while the collecting ability and foaming property are strong, resulting in an increase in the floating amount and entrainment amount of gangue; when the ratio of sodium humate is too large, the recovery rate of the lithium concentrate decreases significantly, indicating that excessive sodium humate will inhibit spodumene minerals.

[0092] As shown in Table 4, the flotation test results of Comparative Examples 4 to 8 show that, compared with Example 1, when the combined collector lacks naphthenic acid soap and oleic acid, the concentrate recovery rates obtained are 74.67% and 76.54%, respectively, indicating that adding a small amount of naphthenic acid soap and oleic acid to the combined collector is beneficial to improving the concentrate recovery rate. When the combined collector lacks sodium humate, the recovery rate is improved, but the Li2O grade of the concentrate decreases significantly, indicating that sodium humate, as an inhibitor component, can effectively improve the flotation separation effect when added to the combined collector in small amounts. When a conventional reagent system of a single oxidized paraffin soap or an oxidized paraffin soap + naphthenic acid soap is used, the flotation concentrate grade and recovery rate are significantly reduced, indicating that the synergistic effect between the reagent molecules in the combined collector gives it a strong collecting ability even under low temperature and strong alkaline conditions, and has a significant benefit effect on improving concentrate indicators.

[0093] Comparative Example 9

[0094] This comparative example used the same flotation process and reagent dosage as Example 1. The difference was that sodium carbonate was added in the mill instead of during the slurry preparation stage. This reduced the slurry preparation time by 10 minutes. The flotation test results are shown in Table 5.

[0095] Table 5 Flotation test results of Comparative Example 9

[0096]

[0097]

[0098] From the flotation test results of Comparative Example 9 in Table 5, it can be seen that, compared with Example 1, when sodium carbonate is added in the mill, the flotation concentrate index does not change significantly, indicating that the spodumene ore beneficiation method provided by the present invention does not require the addition of sodium carbonate to the mill in a conventional manner, which is beneficial to the centralized layout of the reagent pipelines in the beneficiation plant, especially when the grinding workshop is far away from the flotation workshop.

[0099] Comparative Example 10

[0100] This comparative example uses the same reagent system as Example 1, except that no desliming pretreatment is performed before flotation. The flotation test results are shown in Table 6.

[0101] Comparative Example 11

[0102] This comparative example used the same reagent system as Example 1, except that flotation was used for desliming pretreatment before flotation. Before desliming, 1000 g / t of sodium carbonate was added, the slurry was mixed for 5 minutes, and then 150 g / t of naphthenic acid soap was added. After stirring for 3 minutes, flotation desliming was performed. The flotation pH was 11. The flotation test results are shown in Table 6.

[0103] Table 6 Flotation test results of Comparative Examples 10 to 11

[0104]

[0105] From the flotation test results of Comparative Example 10 in Table 6, it can be seen that compared with Example 1, when no desliming pretreatment is performed before flotation, the flotation concentrate recovery rate is significantly reduced to only 46.84%, indicating that the presence of sludge affects the adsorption of the combined collector on the surface of the spodumene mineral, resulting in the inability of the spodumene mineral particles to float. As shown in the results of Comparative Example 11, when flotation is used for desliming, the sludge is difficult to be effectively removed due to the high pH value of the slurry, and the sludge yield is only 2.59%, resulting in excessively high spodumene flotation sludge content and poor flotation effect.

[0106] In summary, the spodumene collector of the present invention can efficiently capture spodumene minerals in a low-temperature and high-alkali slurry environment and is simple to prepare. The spodumene ore beneficiation method provided by the present invention has a simple process flow, a fast flotation rate of spodumene, a low amount of required adjusting agent, and is suitable for industrial production.

Claims

1. A spodumene flotation collector comprising oxidized paraffin soap, naphthenic acid soap and sodium hydroxide, characterized in that: The oxidized paraffin soap is 55-75 parts by mass, the cyclohexane acid soap is 5-20 parts by mass, the sodium hydroxide is 5-15 parts by mass, and the following components by mass are also included: 5-20 parts by mass of oleic acid and 1-5 parts by mass of sodium humate.

2. A spodumene flotation collector according to claim 1, characterized in that, The invention comprises the following components by weight: 60-75 parts of oxidized paraffin soap, 5-15 parts of cyclohexane acid soap, 5-8 parts of sodium hydroxide, 10-20 parts of oleic acid and 2-5 parts of sodium humate.

3. A spodumene flotation collector according to claim 1, characterized in that, The oxidized paraffin soap comprises the following components in weight percentage: hydroxy acid content ≤15%, carboxyl acid content ≥35%, free alkali ≤1%, moisture ≤30%, and unsaponifiable matter ≤15%.

4. A spodumene flotation collector according to claim 1, characterized in that, Water is used as the solvent, and the mass concentration of the spodumene flotation collector is 3-7%.

5. A spodumene ore beneficiation method, characterized in that: The following steps are involved: S1. Wet ball milling the raw ore to obtain ore pulp; S2, physically desludging the slurry in S1; S3. Slurrying is performed on the deslimed slurry in S2, and 400-1000 g / t of sodium carbonate, 200-700 g / t of sodium hydroxide, 50-200 g / t of an activator, and 1000-1400 g / t of the spodumene flotation collector according to any one of claims 1 to 4 are successively added and stirred to perform flotation.

6. The method according to claim 5, wherein The pulp concentration after desliming in S2 is 26-30%.

7. The method according to claim 5, wherein Add sodium carbonate to S3 and stir for 5 to 10 minutes, then add sodium hydroxide and stir for 10 to 20 minutes, then add activator and stir for 1 to 3 minutes, and finally add spodumene collector and stir for 3 to 5 minutes.

8. The method according to claim 5, wherein After slurry adjustment in S3, the pH of the slurry is 11-13, and the slurry temperature is 5-15°C.

9. The method according to claim 5, wherein After flotation in S3, spodumene concentrate is obtained through a closed-circuit process of one roughing selection, two cleaning selections, and one scavenging selection.

10. The method according to claim 9, wherein In S3, the primary roughing time is 3 to 4 minutes, and the scraped foam is the coarse concentrate; in the primary concentration stage, 0.1 to 200 g / t of sodium carbonate is added to the slurry, and the concentration time is 2 to 4 minutes. The primary concentration foam continues to undergo secondary concentration operations, and the secondary concentration foam is the final concentrate.

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