Collector, flotation agent and method for flotation of barite

Abstract

The present invention belongs to the field of mineral flotation and specifically discloses a collector, flotation reagent, and method for flotating barite. The barite flotation method comprises: mixing a mineral to be selected containing barite with a flotation reagent and performing flotation to obtain a barite concentrate. The flotation reagent includes a collector, and the collector comprises a collector of Formula 1 (#imgabs0#). The present invention employs Formula 1 as a barite collector, thereby improving the barite collection capacity and selectivity, particularly the low-temperature collection capacity and selectivity.

Description

Technical Field

[0001] The present invention belongs to the field of mineral flotation, and in particular relates to the field of barite flotation. Background Art

[0002] Barite is a sulfate mineral whose main component is BaSO4, which is mainly interbedded with calcite, quartz and other components. The main method of recovering barite is flotation. The collectors for flotation of barite mainly include fatty acid collectors, amine collectors, etc. For example, patent document with publication number CN1623674A discloses a method for preparing a barite flotation collector, specifically disclosing the use of oxidized paraffin soap as a collector for the flotation of barite. Chinese patent document with publication number CN120023020A discloses a method for flotation separation of barite and quartz, specifically recording the use of dodecylamine as a collector for the flotation of barite. In addition, patent document with publication number CN117244696A discloses a barite ore collector, specifically recording the use of mixed oleic acid obtained by mixing ricinoleic acid and palmitoleic acid, and using it as a collector for barite flotation.

[0003] In summary, existing conventional fatty acids, amines and other collectors have good flotation effects on barite at room temperature, but face multiple challenges in low temperature environments, especially in low temperature environments (<15°C). For example, in existing technologies, traditional fatty acid collectors have obvious limitations under low temperature conditions: the increased rigidity of their molecular chains leads to a decrease in adsorption activity, and the dispersion in the slurry deteriorates. It is often necessary to heat to above 20°C to maintain basic flotation performance, which not only increases energy consumption costs (energy consumption in winter in northern regions can reach 35%), but also complicates the process flow. At the same time, low temperatures will intensify the competitive adsorption between gangue minerals and barite, and the selective inhibition effect of conventional inhibitors such as water glass will be significantly weakened, resulting in the concentration of Ca in the concentrate. 2+ The dual problems are excessive content (calcite inclusion rate increased by more than 15%) and unstable BaSO4 recovery rate (fluctuation range exceeded 18%).

[0004] At present, the industry urgently needs to develop a flotation system that has low-temperature adaptability, high selectivity, strong collection ability and simplified process. This is of great significance to achieving low-carbon and efficient development of barite resources and meeting the needs of mineral resource security. Summary of the Invention

[0005] In view of the problem that the low-temperature capture rate and capture selectivity of barite are not ideal, the first object of the present invention is to provide a method for flotation of barite, aiming to improve the low-temperature capture capacity, selectivity and process stability of barite.

[0006] The second object of the present invention is to provide a collector and a flotation agent for flotation of barite.

[0007] Barite is often interwoven with other oxide minerals such as calcite and quartz, making flotation separation difficult, and it is difficult to achieve high selectivity and stability at low temperatures. To address this problem, the present invention provides the following improvements:

[0008] A method for flotation of barite, comprising mixing a mineral to be selected containing barite and a flotation agent for flotation to obtain a barite concentrate, wherein the flotation agent comprises a collector, and the collector comprises a collector of formula 1;

[0009] Formula 1

[0010] In formula 1, R1 and R2 are independently C1~C 12 The substituted alkyl group is a C1-C6 alkyl group with a substituent, and the substituted phenyl group is a phenyl group with a substituent. The substituent includes at least one of a hydroxyl group, a C1-C6 alkoxy group, a phenyl group, and a halogen group.

[0011] Y is a C1~C3 alkylene group;

[0012] M1 is H, NH4, Na or K.

[0013] The present invention shows that COOR-SO3 - The formula 1 reagent with adjacent structures and double-COOR structural characteristics can unexpectedly have excellent barite targeting ability. When used for the flotation of barite, it can effectively improve its capture capacity and selectivity, especially the barite capture capacity, selectivity and process stability at low temperatures. The flotation method of the present invention can effectively improve the separation effect of barite and associated oxide minerals under weakly alkaline pulp conditions, while having the characteristics of low reagent dosage and environmental friendliness.

[0014] The alkyl group described in the present invention may be a straight-chain or branched-chain alkyl group.

[0015] In the present invention, the mineral to be selected further comprises gangue, which comprises, for example, at least one of calcite and quartz. The gangue is often naturally interwoven with barite.

[0016] The present invention studies show that the collector of formula 1 can selectively capture barite in a gangue system comprising barite and the embedded barite, thereby improving the barite capture ability and selectivity, and in particular helps to improve its low-temperature capture ability, selectivity and process stability.

[0017] Preferably, the collector further comprises a collector aid, wherein the collector aid comprises at least one of Formula 2 and Formula 3;

[0018] Formula 2

[0019] Formula 3

[0020] In formula 2, R3 is C1~C 16 Alkane, substituted alkyl, phenyl or substituted phenyl; M2 is H, NH4, Na or K;

[0021] In formula 3, R4 is C1~C 16 an alkane, a substituted alkyl, a phenyl or a substituted phenyl; M3 is H, NH4, Na or K.

[0022] The present invention's research shows that combining Formula 1 with a collecting aid can further enhance the low-temperature separation capability of barite.

[0023] Further preferably, the collecting aid comprises Formula 2 and Formula 3, wherein the molar ratio of Formula 2 to Formula 3 is 1:1-2.

[0024] The present invention also shows that the combination of Formula 2 and Formula 3 as collecting aids, and further combined with Formula 1, constitutes a ternary collecting system. This can further achieve the combined synergy between molecules, help to further enhance the targeted selectivity of barite, and improve its low-temperature sorting ability.

[0025] In the present invention, the collector can be a single collector of Formula 1, or a composite collector comprising Formula 1 and a collector-aid. In the case of a composite collector comprising Formula 1 and a collector-aid, the molar percentage of the collector of Formula 1 can be greater than 20%; further, it can be 45-65%. Research has shown that this optimal ratio is expected to further enhance the synergistic properties of the components and improve the low-temperature capture capacity, selectivity, and process stability of barite.

[0026] In the present invention, the amount of collector used in the flotation process can be reasonably adjusted according to the grade of the mineral, for example, it can be 1×10 -7 ~ 1×10 -4 mol / L; further can be 0.5×10 -6 ~ 1×10 -5 mol / L.

[0027] In the present invention, when the collector is a composite collector of Formula 1 and an auxiliary collector, it is preferred to further add an inhibitor to the flotation reagent containing the composite collector. Research in the present invention has shown that using the composite collector, particularly the ternary composite collectors of Formulas 1 to 3, in combination with an inhibitor can further enhance the synergy between the collectors, further improving the low-temperature capture capacity, selectivity, and process stability of barite.

[0028] In the present invention, there is no particular requirement for the type of the inhibitor, and it can be a conventional inhibitor capable of inhibiting the gangue, for example, water glass, potassium silicate, aluminum silicate, sodium fluorosilicate, potassium fluorosilicate, sodium hexametaphosphate, sodium tripolyphosphate, sodium pyrophosphate, disodium hydrogen phosphate, sodium fluoride, ammonium fluoride, calcium fluoride, sodium sulfide, sodium thiosulfate, sodium sulfite, sodium carbonate, sodium oxalate, sodium molybdate, sodium tungstate, oxalic acid, citric acid, tartaric acid, malic acid, maleic acid, malonic acid, glucose Acid, lactic acid, salicylic acid, amino trimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, thioglycolic acid, dithiocarbamate, tannic acid, gallic acid, tannic acid, humic acid, starch, dextrin, carboxymethyl starch, oxidized starch, carboxymethyl cellulose, guar gum, chitosan, sodium lignin sulfonate, calcium lignin sulfonate, sulfonated lignin, polyacrylic acid, polyacrylamide, polyvinyl alcohol, polyethylene glycol, peptone, soy protein, and at least one of the combinations or modified products thereof.

[0029] In the present invention, the molar ratio of the collector to the inhibitor is 1-3:1-3; further, it can be 1:0.8-1.5.

[0030] In the present invention, the flotation temperature is 5-30°C, and can further be 5-20°C. For example, it can be 5°C, 10°C, 15°C, or 20°C. The flotation method of the present invention has excellent stability over a wide temperature range, and particularly has excellent low-temperature capture capacity and selectivity.

[0031] The flotation reagent may also contain a pH adjuster. The pH adjuster may be a conventional pH-regulating component in the industry, including but not limited to at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, calcium oxide, aqueous ammonia, sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, or oxalic acid.

[0032] In the present invention, the pH of the flotation is regulated to be 7 to 10.5, further 7.8 to 10.2, and further 8 to 9. The method of the present invention can achieve excellent capture effect under industrially applicable weakly alkaline conditions.

[0033] In the present invention, the flotation reagent may also contain a frother.

[0034] The foaming agent can be any component with foaming ability in the industry, for example, it can be No. 2 oil, terpineol, BK201, methyl isobutyl carbinol (MIBC), methyl pentanol, 2-ethyl hexanol, C6-C8 mixed fatty alcohols, mixed hexyl alcohol (P-MPA), C5-C7 mixed secondary alcohol 1, 1, 3-triethoxybutane (TEB), methyl alcohol ether, ethyl alcohol ether, butyl alcohol ether, C5-C6 and C5-C9 mixed fatty acid ethyl esters, diethyl phthalate, and at least one of BK, RB, and 730 series foaming agents.

[0035] In the present invention, the amount of the foaming agent can be reasonably adjusted according to the needs, for example, it can be 1×10 -7 ~ 1×10 -4 mol / L; can be further increased to 1×10 -6 ~ 1×10 -5 mol / L.

[0036] In the present invention, the flotation reagent may also contain dispersants and other ingredients that are allowed to be added during the flotation process. The dispersant may be at least one of sodium silicate, sodium hexametaphosphate, sodium carbonate, carboxymethyl cellulose, starch, sodium polyacrylate or tannic acid.

[0037] The present invention includes two preferred embodiments: Mode 1: When the collector is a single Formula 1, the flotation reagent includes the collector of Formula 1, a pH regulator and a frother. The amount of the collector of Formula 1 can be 1×10 -7 ~ 1×10 -4 mol / L; considering the cost, it can be further increased to 0.5×10 -6 ~ 1×10 -5 mol / L; further can be 1×10 -6 ~ 3×10 -6 mol / L. The amount of pH regulator is to control the pH of the pulp at 7~10.5, further 7.8~10.2; further 8~9. The amount of foaming agent can be 1×10 -7 ~ 1×10 -4 mol / L; can be further increased to 1×10 -6 ~ 1×10 -5 mol / L.

[0038] In another embodiment of the present invention, the collector is a composite collector of Formula 1 and a collector-aid, and the flotation reagent of this embodiment includes a composite collector of Formula 1-collector-aid, an inhibitor, a pH regulator and a foaming agent. The amount of the composite collector can be 1×10 -7 ~ 1×10 -4 mol / L; considering the cost, it can be further increased to 0.5×10 -6 ~ 1×10 -5 mol / L; further can be 1×10 -6 ~ 3×10 -6 mol / L. The amount of pH regulator is to control the pH of the pulp at 7~10.5, further 7.8~10.2; further 8~9. The amount of foaming agent can be 1×10 -7 ~ 1×10 -4mol / L; can be further increased to 1×10 -6 ~ 1×10 -5 mol / L. The molar ratio of the collector to the inhibitor may be 1-3:1-3; further may be 1:0.8-1.5.

[0039] The present invention also provides a collector for flotation of barite, wherein the collector is the collector described in the present invention. For example, the collector may be a collector of Formula 1, or a composite collector of Formula 1 and a collector aid.

[0040] The present invention further provides a flotation agent for flotating barite, wherein the flotation agent is the flotation agent comprising the collector in the present invention.

[0041] Beneficial effects

[0042] 1. The present invention uses Formula 1 as a collector for collecting barite, which can enhance the collecting ability and selectivity of barite, especially improve its collecting ability, selectivity and process stability at low temperatures.

[0043] 2. Combining Formula 1 with a collector aid, particularly a ternary collection system constructed with a combination of Formulas 2 and 3, can further achieve synergy and help enhance the flotation selectivity of barite at low temperatures. Furthermore, in a composite system of Formula 1 and a collector aid, adding a specific inhibitor to the flotation reagent can further enhance the low-temperature capture capacity, selectivity, and process stability of barite.

[0044] 3. The present invention can achieve highly selective flotation of barite with low reagent dosage and environmentally friendly conditions. This method can improve barite resource utilization, avoid the slurry heating step in traditional processes, and reduce flotation energy consumption by more than 30%, achieving both economic and environmental advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The flotation flow chart of single mineral and mixed ore for the embodiments and comparative examples is shown.

[0046] Figure 2 The single mineral flotation results of Example 1 (experiment on the dosage of barite low-temperature resistant collector) are shown in the figure (the horizontal axis unit is ×10 -6 mol / L).

[0047] Figure 3 This is a diagram of the single mineral flotation results of Example 2 (slurry pH condition experiment). DETAILED DESCRIPTION

[0048] The effects of the present invention are illustrated using single minerals and artificial mixed minerals of barite, calcite, and quartz (① the weight ratio of barite to calcite is 1:1; ② the weight ratio of barite to quartz is 1:1). Unless otherwise stated, the mineral compositions used in the following cases are as shown in Table 1:

[0049]

[0050] In the following cases, the flotation pH refers to the pH of the pulp during the flotation stage. The acidic regulator in the pH adjuster may be hydrochloric acid, and the alkaline regulator may be sodium hydroxide.

[0051] In addition, each collector can be a hydrogen type (in Formula 1 to Formula 3, M1 to M3 are H agents) and / or a salt type (in Formula 1 to Formula 3, M1 to M3 are NH4 + 、Na + or K + ). During the flotation process, the hydrogen form and salt form of the reagent are related to the pH of the flotation stage. For example, when the pH of the flotation stage is acidic, the reagent in the flotation system exists mainly or entirely in the hydrogen form. When the pH of the flotation stage is alkaline, part or all of M1~M3 in the reagent exists in the salt form of alkaline cations. When the pH is neutral, the hydrogen form and the salt form tend to exist at the same time. In the present invention, as an illustrative method, in the following cases, the reagent initially used for each collector can be a Na salt type (such as in the following formula 1a, formula 1b, formula 1c, formula 2a, formula 3a, and comparative formula a structure, abbreviated as oxygen anion O - ).

[0052] In the present invention, in addition to the collector, other components such as an inhibitor, a foaming agent, and a pH adjuster may be added to the flotation reagent as needed.

[0053] In the following cases, the inhibitors described can be conventional inhibitors in the industry for inhibiting gangue such as calcite and quartz. As an optional solution, unless otherwise stated, the following cases all use water glass (Na2O·nSiO2) as an example, whose modulus is, for example, 2 to 2.3.

[0054] Example 1

[0055] In order to verify the flotation effect of the barite low temperature resistant collector, single barite, calcite and quartz (Table 1) were first used. Figure 1 The single mineral flotation process shown has a flotation temperature of 15°C and is collected using the barite low-temperature resistant collector of this case. Except for the collector dosage, the flotation process parameters of each group of cases are the same. In this example, terpineol is added as a frother, and hydrochloric acid and sodium hydroxide are used as pH adjusters.

[0056] The barite low temperature resistant collector of this embodiment: Formula 1a.

[0057] use Figure 1 The process shown in the figure is as follows: the single pure mineral ore (particle size of 3 mm to 0.5 mm) in Table 1 is dry ball milled, 2.0 g of the single mineral sample with a particle size of 0.074 to 0.038 mm is weighed for each group and poured into a 40 mL flotation tank, a pH adjuster is added to adjust the slurry to pH = 8, 35 mL of deionized water is added, and then the barite low-temperature resistant collector of this embodiment is added, and an appropriate amount of deionized water is added, and the mixture is stirred for 3 minutes, and terpineol (amount of 1×10 -6 mol / L), stirred for 3 min, and began to scrape foam for 3 min. The concentrate was scraped into the concentrate basin along with the foam, and the tailings remained in the flotation tank. The concentrate and tailings were filtered and dried, and then weighed separately to calculate the recovery rate. Each group of experiments was carried out in three parallel groups, and the average value was taken. Figure 2 The recovery rates of barite and other oxidized minerals (calcite and quartz in the present invention) in Example 1 at different barite low-temperature resistant collector dosages are shown in FIG.

[0058] The experimental results show that ( Figure 2 ), when the pH value of the pulp is 8, the collector of this embodiment is in the range of 0.5~2.0×10 -6 mol / L concentration showed good selectivity. Especially at 1×10 -6 Even at a low concentration of 1.5 mol / L, the barite recovery rate can reach over 80%, while the recoveries of calcite and quartz are less than 30% and 3%, respectively. This data confirms that the barite low-temperature-resistant collector of the present invention has a strong capture ability for barite in a weakly alkaline environment, but a very weak capture ability for associated oxide minerals, demonstrating excellent high-selectivity flotation performance.

[0059] Example 2

[0060] In order to verify the effect of regulating the pH of the pulp on the flotation effect of the barite low-temperature collector, high-purity barite and other pure oxide minerals (Table 1) were used. Figure 1 The flotation process of a single mineral is shown in the figure. The pure mineral is collected by using the barite low-temperature collector in this case. The flotation temperature is 15℃ and the amount of barite low-temperature collector is 1×10 -6 mol / L, except for the different pulp pH, the flotation process parameters of each group of cases are the same. In this example, terpineol is added as a frother, and hydrochloric acid and sodium hydroxide are used as pH adjusters.

[0061] The barite low-temperature resistant collector of this embodiment is as follows: Formula 1a.

[0062] use Figure 1The process shown in the figure is as follows: pure mineral ore (particle size 3 mm~0.5 mm) is dry ball milled, 2.0 g of single mineral sample with a particle size range of 0.074~0.038 mm is weighed for each group and poured into a 40 mL flotation tank, pH adjuster is added to adjust the pH of the pulp to 8, 9 or 10, 35 mL of deionized water is added, and then the barite low-temperature resistant collector of this embodiment is added, and an appropriate amount of deionized water is added, stirred for 3 min, and terpineol (amount of 1×10 -6 mol / L), stirred for 3 min, and began to scrape foam for 3 min. The concentrate was scraped into the concentrate basin along with the foam, and the tailings remained in the flotation tank. The concentrate and tailings were filtered and dried, and then weighed separately to calculate the recovery rate. Each group of experiments was carried out in three parallel groups, and the average value was taken. Figure 3 is the recovery rate of each sulfide mineral in Example 2 under different slurry pH conditions.

[0063] like Figure 3 As shown, under weakly alkaline slurry conditions of pH 8-10, the collector of this example exhibited significant selectivity differences between barite and other oxide minerals. Flotation results showed that barite was primarily enriched in the concentrate, while associated oxide minerals were primarily retained in the tailings, with a significant difference in recovery rates between the two. Example 2 further demonstrated the applicability of this collector under neutral to weakly alkaline conditions, effectively achieving the selective separation of barite from other oxide minerals.

[0064] Example 3

[0065] In order to verify the flotation performance of the barite low-temperature resistant collector or low-temperature resistant flotation agent in dealing with mixed ore flotation, high-purity barite with a particle size range of 0.074-0.038 mm and other pure oxidized mineral samples were mixed in a ratio of 1:1 to obtain an artificial mixed ore (Table 1). Figure 1 The mixed ore flotation process shown in the figure has a flotation temperature of 20℃, 15℃ or 10℃. The mixed ore is collected by the barite low temperature resistant collector in this case. The dosage of the barite low temperature resistant collector is 1×10 -6 mol / L, pulp pH=8, and other flotation process parameters of each case group were the same. Terpineol was added as a frother (dosage was 1×10 -6 mol / L). In this embodiment, hydrochloric acid and sodium hydroxide are used as pH adjusters.

[0066] The flotation reagents used in the following cases are:

[0067] Example 3-1: The flotation reagent includes a collector, a pH adjuster, and a frother, wherein the collector is only the collector of formula 1a;

[0068] Example 3-2: The flotation reagent includes a collector, a pH regulator and a frother, wherein the collector is only the one of formula 1b ( );

[0069] Example 3-3: The flotation reagent includes a collector, a pH regulator and a frother, wherein the collector is only the one of formula 1c ( );

[0070] Example 3-4: The flotation reagent includes a collector, an inhibitor, a pH regulator and a frother, wherein the collector includes Formula 1a and Formula 2a ( ) and Equation 3a ( ); the molar ratio of the total collector and the inhibitor is 5: 6.

[0071] Example 3-5: Compared with Example 3-4, the only difference is that the collector includes Formula 1a, Formula 2a and Formula 3a in a molar ratio of 8:3:3; the molar ratio of the total collector and the inhibitor is 14:15.

[0072] Example 3-6: Compared with Example 3-4, the only difference is that the molar ratio of the total collector and the inhibitor is 12:10.

[0073] Example 3-7: Compared with Example 3-4, the only difference is that the collector includes Formula 1a and Formula 3a in a molar ratio of 3:1; the molar ratio of the total collector and the inhibitor is the same as that of Example 3-4.

[0074] Example 3-8: Compared with Example 3-4, the only difference is that the collector includes Formula 1a and Formula 2a in a molar ratio of 3:1; the molar ratio of the total collector and the inhibitor is the same as that of Example 3-4.

[0075] Example 3-9: Compared with Example 3-4, the only difference is that no inhibitor is added.

[0076] Example 3-10: Compared with Example 3-4, the only difference is that the collector includes Formula 1a, Formula 2a and Formula 3a in a molar ratio of 1:3:3; the molar ratio of the total collector and the inhibitor is the same as that of Example 3-4.

[0077] Note: In the above cases, the pH and the composition and dosage of the foaming agent are the same; the total dosage of the collector is the same, both 1×10 -6 mol / L; the inhibitors added were all water glass, and their molar mass was calculated based on sodium silicate;

[0078] use Figure 1The specific operation is as follows: 2.0 g of the mixed ore sample was weighed from each group and poured into a 40 mL flotation tank. A pH adjuster was added to adjust the slurry to pH 8. After adding 35 mL of deionized water, the reagents of each group (such as the collector in each group and the inhibitor added optionally) were added. An appropriate amount of deionized water was added and stirred for 3 minutes. Terpineol was added as a foaming agent (the dosage was 1×10 -6 mol / L). Stir for 3 minutes, then begin scraping foam for 3 minutes. The concentrate, along with the foam, is scraped into the concentrate basin, and the tailings remain in the flotation tank. The concentrate and tailings are filtered and dried, then weighed separately to calculate the recovery rate. Each experiment was conducted in triplicate, and the average value was taken. Table 2 shows the recovery rate and grade of the mixed ore in Example 3 under different slurry pH conditions.

[0079]

[0080] As shown in Table 2, when dealing with artificial mixed ore, using the collector of this embodiment, good barite capture rate and selectivity can be obtained at different slurry temperatures (10-20°C).

[0081] It can be seen from Example 3-1 to Example 3-3 that, using the single formula 1 of the present invention, good barite low-temperature capture rate and selectivity can be obtained without adding an inhibitor. In addition, it can be seen from Example 3-4 and Example 3-6 that, based on the innovative use of formula 1, further coordination of formula 2 and formula 3 is combined to further strengthen the low-temperature capture rate and selectivity of barite. In addition, it can be seen from Example 3-1, Example 3-4, Example 3-5, Example 3-6, Example 3-7, Example 3-8, Example 3-9 that, using formula 2 and formula 3 as auxiliary collectors, the low-temperature capture capacity and selectivity of formula 1 can be further synergistically strengthened. In addition, when adding formula 2 and / or formula 3 to help collectors, a certain inhibitor is further added to help synchronously strengthen the capture rate and selectivity of barite. In addition, it can be seen from Examples 3-1 and 3-10 that, using the combination collector of the present invention, coordinated with the control of its ratio, the synergy between the components can be further strengthened.

[0082] Comparative Example 1

[0083] Compared with Example 3-4, the only difference is that the processing objects are all artificial mixed ore ① (barite: calcite = 1: 1) in Table 1; the composition of the barite flotation reagent is changed, and the experimental groups are:

[0084] Comparative Example 1-1: Sodium oleate was used to replace Formula 1a in the flotation reagent of Example 3-4, and the other ingredients and amounts were the same as those of Example 3-4.

[0085] Comparative Example 1-2: Sodium dodecyl sulfate was used to replace Formula 1a in the flotation reagent of Example 3-4, and the other ingredients and amounts were the same as those of Example 3-4.

[0086] Comparative Example 1-3: Using comparative formula a ( ) replaces Formula 1a in the flotation reagent of Example 3-4, and the other ingredients and amounts are the same as those of Example 3-4.

[0087] Comparative Example 1-4: Compared with Example 3-4, the only difference is that the collector lacks Formula 1a, and the proportions and amounts of other components in the collector remain unchanged;

[0088] Comparative Example 1-5: Compared with Example 3-4, the only difference is that the collector is the comparative formula b ( ) is replaced by an equal amount of Formula 1a, and the other components, proportions and amounts of the collector are the same as those in Example 3-4;

[0089] Other operations and parameters were the same as in Example 3-4. The flotation results of each group are shown in Table 3.

[0090]

[0091] As shown in Table 3, the flotation results of Comparative Example 1 demonstrate that when the key compound (Formula 1) in the barite collector is replaced with a conventional agent, a similar group structure, or is completely absent (Comparative Examples 1-1 to 1-5), the separation efficiency of barite and calcite decreases significantly. For example, Comparative Examples 1-1 and 1-2 demonstrate that, while the grade reaches over 97% at 20°C, it plummets to 68%-70% at low temperatures (10°C), and the recovery rate is only approximately 53%, demonstrating that conventional collectors are temperature-sensitive and lack selectivity. Comparative Examples 1-3 and 1-4 (Formula 1 replaced with a structural analog or absent) exhibit inferior low-temperature collection capacity, selectivity, and low-temperature flotation stability to those of Formula 1 of the present invention. The low-temperature recovery rate of Comparative Examples 1-5 (Comparative Formula b) is even only 45.9%, further verifying the irreplaceable nature of the compound of Formula 1 in terms of molecular configuration (such as the position of the active group and steric hindrance). Its specific structure can be stably adsorbed on the surface of barite. Similar compounds, due to differences in configuration, find it difficult to achieve both high grade and high recovery rate within a wide temperature range (10-20°C).

[0092] In summary, using Formula 1 as a collector for the capture of barite can enhance the capture ability and selectivity of barite, and in particular can improve its capture ability, selectivity and capture stability at low temperatures.

[0093] In addition, the combination of Formula 1 and a collecting aid, especially the ternary collecting system constructed by combining the collecting aids of Formula 2 and Formula 3, can further achieve synergy and help to further enhance the flotation selectivity of barite at low temperatures.

Claims

1. A method for flotation of barite, comprising mixing a mineral to be selected containing barite with a flotation agent for flotation to obtain a barite concentrate, wherein: The flotation reagent comprises a collector, characterized in that the collector comprises a collector of formula 1; Formula 1; In formula 1, R1 and R2 are independently C1~C 12 The substituted alkyl group is a C1-C6 alkyl group with a substituent, and the substituted phenyl group is a phenyl group with a substituent. The substituent includes at least one of a hydroxyl group, a C1-C6 alkoxy group, a phenyl group, and a halogen group. Y is a C1~C3 alkylene group; M1 is H, NH4, Na or K.

2. The method for flotation of barite according to claim 1, wherein The mineral to be selected also contains gangue, and the gangue contains at least one of calcite and quartz.

3. The method for flotation of barite according to claim 1, wherein The collector further comprises a collector aid, wherein the collector aid comprises at least one of Formula 2 and Formula 3; Formula 2; Formula 3; In formula 2, R3 is C1~C 16 Alkane, substituted alkyl, phenyl or substituted phenyl; M2 is H, NH4, Na or K; In formula 3, R4 is C1~C 16 an alkane, a substituted alkyl, a phenyl or a substituted phenyl; M3 is H, NH4, Na or K.

4. The method for flotation of barite as claimed in claim 3, wherein The collecting aid comprises Formula 2 and Formula 3, wherein the molar ratio of Formula 2 to Formula 3 is 1: 1-2; In the collector, the molar content of the collector of formula 1 is above 20%.

5. The method for flotation of barite according to claim 3, wherein The flotation reagent further comprises an inhibitor, wherein the molar ratio of the collector to the inhibitor is 1-3:1-3.

6. The method for flotation of barite according to any one of claims 1 to 5, wherein During the flotation process, the amount of collector used is 1×10 -7 ~ 1×10 -4 mol / L.

7. The method for flotation of barite according to any one of claims 1 to 5, wherein The flotation temperature is 5~30°C.

8. The method for flotation of barite according to any one of claims 1 to 5, wherein The flotation reagent also contains a pH regulator to control the pH of the flotation process to 7-10.5; The flotation reagent also includes a foaming agent, wherein the amount of the foaming agent can be 1×10 -7 ~ 1×10 -4 mol / L.

9. A collector for flotation of barite, characterized in that: The collector according to any one of claims 1 to 8 is used in the method for flotation of barite.

10. A flotation agent for flotation of barite, characterized in that: It is a flotation agent in the method for flotation of barite according to any one of claims 1 to 8.

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