A galena flotation depressant, its preparation method and application

Abstract

The application provides a galena flotation inhibitor and a preparation method and application thereof, and relates to the field of mineral flotation. A general structure of the galena flotation inhibitor is as follows: wherein R1 includes any one of substituted or non-substituted C1-C12 alkyl, substituted or non-substituted C1-C12 unsaturated alkyl, and substituted or non-substituted C3-C12 cycloalkyl; R2 includes any one of carboxyl, amino, hydroxyl, fluorine, chlorine and bromine; X includes any one of oxygen, sulfur and nitrogen; M1 and M2 each independently include any one of sodium, potassium and lithium. The galena flotation inhibitor can improve the adsorption capacity and hydrophilicity on the surface of galena, so that the galena cannot float, and the flotation separation of the target mineral and the galena is realized.

Description

Technical Field

[0001] This application relates to the field of mineral flotation, and in particular to a galena flotation inhibitor, its preparation method, and its application. Background Technology

[0002] Lead, as a key non-ferrous metal resource, plays an irreplaceable role in the economic development of modern society. It has wide applications in many fields such as battery manufacturing, construction, aerospace, and shipbuilding. Galena (PbS), as the main ore source of lead, is crucial to the lead industry. However, galena often occurs in association with realgar (As4S4) in nature. Both have good natural floatability, resulting in realgar often being mixed in with lead concentrate. During the smelting process, realgar is converted into highly toxic arsenic trioxide (As2O3), which poses a serious threat to the environment and human health. Therefore, the content of realgar in galena directly affects its economic value, and high realgar content will significantly reduce the economic value of galena concentrate.

[0003] In flotation processes, a fundamental principle is to promote the flotation of minerals with lower content while suppressing those with higher content. Therefore, in the purification process of lead concentrate, galena depressants are used to suppress the flotation of galena, thereby achieving effective separation of galena and realgar. Thus, galena depressants with good suppression properties for galena are key to achieving efficient separation of galena and realgar in flotation.

[0004] Galena depressants are mainly divided into two categories: inorganic and organic. Inorganic depressants, such as phosphoroxane, potassium dichromate, and sulfites, have good inhibitory effects on galena, but their high toxicity may pose serious risks to environmental safety and the health of workers. Therefore, appropriate safety measures must be taken when using these depressants. In contrast, organic depressants are increasingly favored by researchers due to their low toxicity and good environmental compatibility. However, organic depressants often fail to achieve good inhibitory effects on galena during flotation. Therefore, it is necessary to develop a new type of galena flotation depressant. Summary of the Invention

[0005] The purpose of this application is to provide a galena flotation inhibitor, its preparation method, and its application, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the first aspect of this application provides a galena flotation depressant with the following general structural formula:

[0007]

[0008] R1 includes any one of substituted or unsubstituted C1-C12 alkyl groups, substituted or unsubstituted C2-C12 unsaturated hydrocarbon groups, and substituted or unsubstituted C3-C12 cycloalkyl groups.

[0009] R2 includes any one of carboxyl, amino, hydroxyl, fluorine, chlorine, and bromine;

[0010] X includes any one of oxygen, sulfur, and nitrogen;

[0011] M1 and M2 each independently include any one of sodium, potassium, and lithium.

[0012] Optionally, the galena flotation depressant satisfies at least one of the following conditions:

[0013] A. The substituted or unsubstituted C1-C12 alkyl group includes one or more of -CH2-, -(CH2)2-, and -CH(OH)-;

[0014] B. The substituted or unsubstituted C2-C12 unsaturated hydrocarbon group includes one or more of -CH=CH-, -CH2-CH=CH-, -CH2-CH=CH-CH2-, and -(CH2)2-CH=CH-CH2-;

[0015] C. The substituted or unsubstituted C4-C12 cycloalkyl group includes one or more of cyclobutane, cyclopentane, and cyclohexane.

[0016] A second aspect of this application provides a method for preparing the aforementioned galena flotation depressant, comprising:

[0017] Water, carboxyl compounds, carbon disulfide, and alkali are first mixed and reacted to obtain the galena flotation inhibitor.

[0018] Optionally, the method for preparing the galena flotation depressant satisfies at least one of the following conditions:

[0019] A. The first mixing comprises: a second mixing of the water, the carboxyl compound, and the base to obtain a mixture;

[0020] The mixture and the carbon disulfide are then mixed a third time;

[0021] B. After the reaction is completed, the mixture is dried and filtered to obtain the galena flotation inhibitor.

[0022] Optionally, the general structural formula of the carboxyl compound is:

[0023]

[0024] Optionally, the carboxyl compound includes one or more of glutamic acid, tartaric acid, glyceric acid, 2,4-dihydroxy-butyric acid, L-isoserine, (R)-3-chlorolactic acid, and malic acid.

[0025] Optionally, the method for preparing the galena flotation depressant satisfies at least one of the following conditions:

[0026] A. The alkali includes one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate;

[0027] B. The molar ratio of the alkali to the carbon disulfide is (2.05-9.2):1;

[0028] C. The molar ratio of the carboxyl compound to the carbon disulfide is 1:(1.05-3.2);

[0029] D. The mass ratio of the carboxyl compound to the water is 1:(2-9).

[0030] Optionally, the reaction temperature is 20℃-60℃ and the time is 0.5h-8h.

[0031] The third aspect of this application provides an application of the galena flotation inhibitor described above or the galena flotation inhibitor prepared by the method described above, for the flotation of galena.

[0032] Optionally, the application of the galena flotation depressant satisfies at least one of the following conditions:

[0033] A. The raw galena ore includes molybdenite containing galena, realgar containing galena, and chalcopyrite containing galena;

[0034] B. A collector is added during the flotation process, the collector including ethyl thiocyanate.

[0035] Compared with the prior art, the beneficial effects of this application include:

[0036] The galena flotation inhibitor provided in this application possesses both dithiocarboxyl and carboxyl groups, which are both hydrophilic groups. The dithiocarboxyl groups can selectively adsorb onto the surface of galena, and adjacent carboxyl groups can also adsorb onto the surface of galena simultaneously, enhancing the inhibitor's adsorption capacity on the galena surface. The R2 functional group is a hydrophilic group, which promotes the hydrophilicity of the galena surface after the inhibitor is adsorbed onto it, thereby inhibiting the flotation of galena during the flotation process and achieving the flotation separation of the target mineral and galena.

[0037] The method for preparing galena flotation inhibitors provided in this application is simple to operate, uses widely available raw materials, and produces stable product quality, making it suitable for large-scale industrial production.

[0038] The application of the galena flotation inhibitor provided in this application can improve the economic efficiency of the separation and enrichment process, reduce the environmental impact of low-grade resource development and utilization, and enhance the comprehensive utilization rate of mineral resources. It can be widely used in the field of mineral flotation. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope of this application.

[0040] Figure 1 The mass spectrum of the galena flotation inhibitor prepared in Example 1;

[0041] Figure 2 The mass spectrum of the galena flotation inhibitor prepared in Example 2 is shown below.

[0042] Figure 3 This is the mass spectrum of the galena flotation inhibitor prepared in Example 3. Detailed Implementation

[0043] As used in this article:

[0044] "Prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing", or any other variations thereof as used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0045] The conjunction "composed of..." excludes any unspecified elements, steps, or components. If used in a claim, this phrase makes the claim closed, excluding materials other than those described, except for associated conventional impurities. When the phrase "composed of..." appears in a clause of the body of a claim rather than immediately following it, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0046] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1–5” is disclosed, the described range should be interpreted as including ranges “1–4”, “1–3”, “1–2”, “1–2 and 4–5”, “1–3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0047] In these embodiments, unless otherwise specified, the portions and percentages are all by weight.

[0048] "Parts by mass" refers to the basic unit of measurement that expresses the mass ratio of multiple components. One part can represent any unit mass, such as 1g or 2.689g. If we say that component A has "a" parts by mass and component B has "b" parts by mass, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it can mean that the mass of component A is aK and the mass of component B is bK (K is any number representing a multiplier). It is important to understand that, unlike the number of parts by mass, the sum of the mass parts of all components is not limited to 100 parts.

[0049] "And / or" is used to indicate that one or both of the described situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0050] The first aspect of this application provides a galena flotation inhibitor, with the following general structural formula:

[0051]

[0052] R1 includes any one of substituted or unsubstituted C1-C12 alkyl groups, substituted or unsubstituted C2-C12 unsaturated hydrocarbon groups, and substituted or unsubstituted C3-C12 cycloalkyl groups.

[0053] Optionally, the substituted or unsubstituted C1-C12 alkyl group can be a substituted or unsubstituted methyl group, a substituted or unsubstituted ethyl group, a substituted or unsubstituted propyl group, a substituted or unsubstituted butyl group, a substituted or unsubstituted pentyl group, a substituted or unsubstituted hexyl group, a substituted or unsubstituted heptyl group, a substituted or unsubstituted octyl group, a substituted or unsubstituted nonyl group, a substituted or unsubstituted decyl group, a substituted or unsubstituted C11 alkyl group, a substituted or unsubstituted C12 alkyl group, or any substituted or unsubstituted alkyl group between C1 and C12.

[0054] Optionally, the substituted or unsubstituted C2-C12 unsaturated hydrocarbon group can be a substituted or unsubstituted C2 unsaturated hydrocarbon group, a substituted or unsubstituted C3 unsaturated hydrocarbon group, a substituted or unsubstituted C4 unsaturated hydrocarbon group, a substituted or unsubstituted C5 unsaturated hydrocarbon group, a substituted or unsubstituted C6 unsaturated hydrocarbon group, a substituted or unsubstituted C7 unsaturated hydrocarbon group, a substituted or unsubstituted C8 unsaturated hydrocarbon group, a substituted or unsubstituted C9 unsaturated hydrocarbon group, a substituted or unsubstituted C10 unsaturated hydrocarbon group, a substituted or unsubstituted C11 unsaturated hydrocarbon group, a substituted or unsubstituted C12 unsaturated hydrocarbon group, or any substituted or unsubstituted C2-C12 unsaturated hydrocarbon group.

[0055] Optionally, the substituted or unsubstituted C3-C12 cycloalkyl group can be a substituted or unsubstituted C3 cycloalkyl group, a substituted or unsubstituted C4 cycloalkyl group, a substituted or unsubstituted C5 cycloalkyl group, a substituted or unsubstituted C6 cycloalkyl group, a substituted or unsubstituted C7 cycloalkyl group, a substituted or unsubstituted C8 cycloalkyl group, a substituted or unsubstituted C9 cycloalkyl group, a substituted or unsubstituted C10 cycloalkyl group, a substituted or unsubstituted C11 cycloalkyl group, a substituted or unsubstituted C12 cycloalkyl group, or any substituted or unsubstituted cycloalkyl group between C1 and C12.

[0056] Among them, substituted alkyl refers to one or more H in an alkyl group being replaced by other groups, and unsaturated hydrocarbon group refers to a group containing a double bond, a triple bond, or a benzene ring;

[0057] It should be noted that R1 includes any of the following: substituted or unsubstituted C1-C12 alkyl groups, substituted or unsubstituted C2-C12 unsaturated hydrocarbon groups, substituted or unsubstituted C3-C12 cycloalkyl groups, which can be connected to hydrophilic groups such as R2 and dithiocarboxylate salts.

[0058] R2 includes any one of carboxyl, amino, hydroxyl, fluorine, chlorine, and bromine;

[0059] It should be noted that R2 includes any of the following groups: carboxyl, amino, hydroxyl, fluorine, chlorine, and bromine, which can make the galena surface hydrophilic after the inhibitor is adsorbed on it.

[0060] X includes any one of oxygen, sulfur, and nitrogen;

[0061] It should be noted that X includes any of oxygen, sulfur, and nitrogen that can react with carbon disulfide to form dithiocarboxylate.

[0062] M1 and M2 each independently include any one of sodium, potassium, and lithium.

[0063] It should be noted that M1 and M2 each independently include any one of sodium, potassium, and lithium, and are cations obtained during the reaction to form dithiocarboxylate.

[0064] In some embodiments, the galena flotation depressant satisfies at least one of the following conditions:

[0065] A. The substituted or unsubstituted C1-C12 alkyl group includes one or more of -CH2-, -(CH2)2-, and -CH(OH)-;

[0066] B. The substituted or unsubstituted C2-C12 unsaturated hydrocarbon group includes one or more of -CH=CH-, -CH2-CH=CH-, -CH2-CH=CH-CH2-, and -(CH2)2-CH=CH-CH2-;

[0067] C. The substituted or unsubstituted C4-C12 cycloalkyl group includes one or more of cyclobutane, cyclopentane, and cyclohexane.

[0068] A second aspect of this application provides a method for preparing the aforementioned galena flotation depressant, comprising:

[0069] Water, carboxyl compounds, carbon disulfide, and alkali are first mixed and reacted to obtain the galena flotation inhibitor.

[0070] In some embodiments, the reaction of the first mixture is:

[0071]

[0072] In some embodiments, the method for preparing the galena flotation depressant satisfies at least one of the following conditions:

[0073] A. The first mixing comprises: a second mixing of the water, the carboxyl compound, and the base to obtain a mixture;

[0074] The mixture and the carbon disulfide are then mixed a third time;

[0075] It should be noted that the mixture is prepared first, and then the mixture is mixed with carbon disulfide to obtain the galena inhibitor.

[0076] B. After the reaction is completed, the mixture is dried and filtered to obtain the galena flotation inhibitor.

[0077] In some embodiments, the general structural formula of the carboxyl compound is:

[0078]

[0079] In some embodiments, the carboxyl compound includes one or more of glutamic acid, tartaric acid, and malic acid.

[0080] In some embodiments, the method for preparing the galena flotation depressant satisfies at least one of the following conditions:

[0081] A. The alkali includes one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate;

[0082] B. The molar ratio of the alkali to the carbon disulfide is (2.05-9.2):1;

[0083] Optionally, the molar ratio of alkali to carbon disulfide can be any value between 2.05:1, 2.1:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1, 5:1, 5.5:1, 6:1, 6.5:1, 7:1, 7.5:1, 8:1, 8.5:1, 9:1, 9.2:1, or (2.05-9.2):1.

[0084] It should be noted that when the molar ratio of alkali to carbon disulfide is (2.05-9.2):1, the reaction of carboxyl compounds can be more complete.

[0085] C. The molar ratio of the carboxyl compound to the carbon disulfide is 1:(1.05-3.2);

[0086] Optionally, the molar ratio of the carboxyl compound to carbon disulfide can be any value between 1:1.05, 1:1.5, 1:2, 1:2.5, 1:3, 1:3.2 or 1:(1.05-3.2);

[0087] It should be noted that when the molar ratio of carboxyl compound to carbon disulfide is 1:(1.05-3.2), the reaction of carboxyl compound can be more complete.

[0088] D. The mass ratio of the carboxyl compound to the water is 1:(2-9).

[0089] Optionally, the mass ratio of the carboxyl compound to water can be any value between 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9 or 1:(2-9).

[0090] It should be noted that when the mass ratio of carboxyl compound to water is 1:(2-9), the reaction of the carboxyl compound can be more complete.

[0091] In some embodiments, the reaction temperature is 20°C-60°C and the time is 0.5h-8h.

[0092] Optionally, the reaction temperature can be any value between 20℃, 25℃, 30℃, 35℃, 40℃, 45℃, 50℃, 55℃, 60℃ or 20℃-60℃, and the time can be any value between 0.5h, 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h or 0.5h-8h.

[0093] The third aspect of this application provides an application of the galena flotation inhibitor described above or the galena flotation inhibitor prepared by the method described above, for the flotation of galena.

[0094] In some embodiments, the application of the galena flotation depressant satisfies at least one of the following conditions:

[0095] A. The raw galena ore includes molybdenite containing galena, realgar containing galena, and chalcopyrite containing galena;

[0096] B. A collector is added during the flotation process, the collector including ethyl thiocyanate.

[0097] It should be noted that when the collector is ethyl thiocyanate, the galena flotation depressant provided in this application is used. Since the dithiocarboxylate groups in the galena depressant selectively adsorb onto the galena surface, the adjacent carboxyl groups can also adsorb onto the galena surface, thus enhancing the adsorption strength of the galena depressant on the galena surface. Therefore, when the collector is ethyl thiocyanate, the flotation of galena can be inhibited.

[0098] The implementation schemes of this application will be described in detail below with reference to specific embodiments. However, those skilled in the art will understand that the following embodiments are only for illustrating this application and should not be regarded as limiting the scope of this application. Unless otherwise specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments used without specified manufacturers are all conventional products that can be purchased commercially.

[0099] Example 1

[0100] The first aspect of this embodiment provides a galena flotation inhibitor, with the following structural formula:

[0101]

[0102] The second aspect of this embodiment provides a method for preparing a galena flotation depressant, comprising:

[0103] Add 100g of water to a four-necked flask, then add 29.4g (0.2mol) of glutamic acid, followed by 24.3g of sodium hydroxide. Raise the temperature to 35℃, then gradually add 18g of carbon disulfide dropwise to carry out the reaction. After the addition is complete, stir for 4 hours. After the reaction is complete, dry the reaction solution under vacuum and filter to obtain the final product, galena flotation inhibitor YJ-01.

[0104] The third aspect of this embodiment provides an application of a galena flotation depressant, including:

[0105] S1: A rough concentrate was obtained by using ethyl thiocyanate (20 g / t) as a collector in a large copper-lead mine in central my country after a single roughing process.

[0106] The crude concentrate contains 75.1% galena, 9.4% chalcopyrite, 3.2% sphalerite, 2.2% pyrite, 2.2% chalcocite, 1.8% tetrahedrite, 4.3% quartz, and 1.8% other minerals.

[0107] S2: Galena flotation inhibitors are added to the rough concentrate with a pulp concentration of 27% to perform a single cleaning process to obtain the flotation concentrate.

[0108] This embodiment describes the structural determination and verification of the prepared galena flotation inhibitor, as shown in the mass spectrometry results. Figure 1 As shown in the figure, the molecular weight obtained by mass spectrometry is the same as that of the molecule designed in Example 1, so the molecule synthesized in this example is the target molecule.

[0109] Example 2

[0110] The first aspect of this embodiment provides a galena flotation inhibitor, with the following structural formula:

[0111]

[0112] The second aspect of this embodiment provides an application of a galena flotation depressant, including:

[0113] Add 100g of water to a four-necked flask, then add 30.1g (0.2mol) of tartaric acid, followed by 24.8g of sodium hydroxide. Raise the temperature to 40℃, then gradually add 24g of carbon disulfide dropwise to carry out the reaction. After the addition is complete, stir for 5 hours. After the reaction is complete, dry the reaction solution under vacuum and filter to obtain the final product, galena flotation inhibitor YJ-02.

[0114] The third aspect of this embodiment provides a flotation method for galena flotation depressant, including:

[0115] S1: A rough concentrate was obtained by using ethyl thiocyanate (20 g / t) as a collector in a large copper-lead mine in central my country after a single roughing process.

[0116] The crude concentrate contains 75.1% galena, 9.4% chalcopyrite, 3.2% sphalerite, 2.2% pyrite, 2.2% chalcocite, 1.8% tetrahedrite, 4.3% quartz, and 1.8% other minerals.

[0117] S2: Galena flotation inhibitors are added to the rough concentrate with a pulp concentration of 27% to perform a single cleaning process to obtain the flotation concentrate.

[0118] This embodiment describes the structural determination and verification of the prepared galena flotation inhibitor, as shown in the mass spectrometry results. Figure 2 As shown in the figure, the molecular weight obtained by mass spectrometry is the same as that of the molecule designed in Example 2, so the molecule synthesized in this example is the target molecule.

[0119] Example 3

[0120] The first aspect of this embodiment provides a galena flotation inhibitor, with the following structural formula:

[0121]

[0122] The second aspect of this embodiment provides a method for preparing a galena flotation depressant, comprising:

[0123] Add 100g of water to a four-necked flask, then add 26.8g (0.2mol) of malic acid, followed by 25.8g of sodium hydroxide. Raise the temperature to 37℃, then gradually add 20g of carbon disulfide to carry out the reaction. After the addition is complete, stir for 8 hours. After the reaction is complete, dry the reaction solution under vacuum and filter to obtain the final product, galena flotation inhibitor YJ-03.

[0124] The third aspect of this embodiment provides an application of a galena flotation depressant, including:

[0125] S1: A rough concentrate was obtained by using ethyl thiocyanate (20 g / t) as a collector in a large copper-lead mine in central my country after a single roughing process.

[0126] The crude concentrate contains 75.1% galena, 9.4% chalcopyrite, 3.2% sphalerite, 2.2% pyrite, 2.2% chalcocite, 1.8% tetrahedrite, 4.3% quartz, and 1.8% other minerals.

[0127] S2: Galena flotation inhibitors are added to the rough concentrate with a pulp concentration of 27% to perform a single cleaning process to obtain the flotation concentrate.

[0128] This embodiment describes the structural determination and verification of the prepared galena flotation inhibitor, as shown in the mass spectrometry results. Figure 3As shown in the figure, the molecular weight obtained by mass spectrometry is the same as that of the molecule designed in Example 3, so the molecule synthesized in this example is the target molecule.

[0129] Comparative Example 1

[0130] This comparative example provides an application of a galena flotation depressant, differing from Example 1 in that the galena flotation depressant in this comparative example is sodium mercaptoacetate YJ-04, which is commercially available. The manufacturer is Tieling Mineral Processing Reagent Plant, and the content is 30%.

[0131] Comparative Example 2

[0132] This comparative example provides an application of a galena flotation depressant, differing from Example 1 in that the galena flotation depressant in this comparative example is sodium thiosulfate YJ-05, which is commercially available. The manufacturer is Tieling Mineral Processing Reagent Plant, and the content is 30%.

[0133] Comparative Example 3

[0134] The first aspect of this comparative example provides a galena flotation inhibitor, with the following structural formula:

[0135]

[0136] The second aspect of this comparative example provides a method for preparing a galena flotation depressant, comprising:

[0137] Add 100g of water to a four-necked flask, then add 23.8g (0.2mol) of (R)-3-amino-2-(hydroxymethyl)propionic acid, followed by 25.8g of sodium hydroxide. Raise the temperature to 37℃, then gradually add 20g of carbon disulfide to carry out the reaction. After the addition is complete, stir for 8 hours. After the reaction is complete, dry the reaction solution under vacuum and filter to obtain the final product, galena flotation inhibitor YJ-08.

[0138] The third aspect of this comparative example provides an application of a galena flotation depressant, including:

[0139] S1: A rough concentrate was obtained by using ethyl thiocyanate (20 g / t) as a collector in a large copper-lead mine in central my country after a single roughing process.

[0140] The crude concentrate contains 75.1% galena, 9.4% chalcopyrite, 3.2% sphalerite, 2.2% pyrite, 2.2% chalcocite, 1.8% tetrahedrite, 4.3% quartz, and 1.8% other minerals.

[0141] S2: Galena flotation inhibitors are added to the rough concentrate with a pulp concentration of 27% to perform a single cleaning process to obtain the lead concentrate after flotation.

[0142] The lead concentrates provided by Examples 1-3 and Comparative Examples 1-5 after flotation were tested, and the specific data are shown in Table 1.

[0143] Table 1 Test data of lead concentrate after flotation

[0144] sample Yield % Lead grade / % Lead recovery rate / % Example 1 85.44 75.31 97.8 Example 2 86.07 75.34 98.49 Example 3 84.32 76.15 97.58 Comparative Example 1 78.65 71.58 85.56 Comparative Example 2 75.22 72.32 82.67 Comparative Example 3 70.58 73.85 79.23

[0145] As can be seen from the results in Table 1, compared with the use of sodium mercaptoacetate and sodium thiosulfate as depressants, the galena flotation depressant provided in this application has a good inhibitory effect on galena during the flotation process, improves the separation effect between the target mineral and galena, and the lead grade obtained in one flotation is as high as about 76.15%, and the lead recovery rate is as high as 97.58%.

[0146] Therefore, the galena flotation separation inhibitor provided in this application has a good inhibitory effect on galena, which can realize the flotation separation of the target mineral and galena, improve the economic efficiency of separation and enrichment, reduce the environmental impact during the development and utilization of low-grade resources, and improve the comprehensive utilization rate of mineral resources. It can be widely used in the field of mineral flotation.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0148] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the foregoing claims, any of the claimed embodiments can be used in any combination. The information disclosed in this background section is intended only to enhance the understanding of the general background of this application and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

Claims

1. A galena flotation depressant characterized in that, A general structure is: ； wherein R1 includes any one of a substituted or unsubstituted C1-C12 alkyl, a substituted or unsubstituted C2-C12 unsaturated hydrocarbon group, a substituted or unsubstituted C3-C12 cycloalkyl; R2 includes any one of a carboxyl group, an amino group, a hydroxyl group, fluorine, chlorine, bromine; X includes any one of oxygen, sulfur; M1 and M2 each independently include any one of sodium, potassium, lithium; the substituted or unsubstituted C1-C12 alkyl includes one or more of -CH2-, - (CH2)2-, -CH(OH)-; the substituted or unsubstituted C2-C12 unsaturated hydrocarbon group includes one or more of -CH=CH-, -CH2-CH=CH-, -CH2-CH=CH-CH2-, - (CH2)2-CH=CH-CH2-; the substituted or unsubstituted C3-C12 cycloalkyl includes one or more of cyclobutane, cyclopentane, cyclohexane.

2. A process for the preparation of the galena flotation depressant of claim 1, characterized by, comprising: mixing water, a carboxyl compound, carbon disulfide, and a base to obtain the galena flotation depressant.

3. The process for the preparation of a galena flotation depressant according to claim 2, characterized in that, satisfying at least one of the following conditions: A. the first mixing comprises: mixing the water, the carboxyl compound, and the base to obtain a mixture; mixing the mixture and the carbon disulfide; B. after the reaction, drying and filtering to obtain the galena flotation depressant.

4. The process for preparing the galena flotation depressant according to claim 2, characterized by, A general structure of the carboxyl compound is: 。 5. The method of preparing a galena flotation depressant according to claim 2, characterized in that, the carboxyl compound includes one or more of glutamic acid, tartaric acid, glyceric acid, 2,4-dihydroxy-butanoic acid, L-isoserine, (R)-3-chlorolactic acid, and malic acid.

6. The method of preparing a galena flotation depressant according to claim 2, characterized in that, satisfying at least one of the following conditions: A. the base includes one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate; B. a molar ratio of the base to the carbon disulfide is (2.05-9.2):1; C. a molar ratio of the carboxyl compound to the carbon disulfide is 1:(1.05-3.2); D. a mass ratio of the carboxyl compound to the water is 1:(2-9).

7. The method of preparing a galena flotation depressant according to any one of claims 2 to 6, characterized in that, a temperature of the reaction is 20℃-60℃, and a time is 0.5h-8h.

8. Use of the galena flotation depressant of claim 1 or the galena flotation depressant produced by the method of any one of claims 2 to 7, characterized in that, for carrying out the flotation of galena.

9. The use of a galena flotation depressant according to claim 8, characterized in that satisfying at least one of the following conditions: A. the raw ore of the galena includes molybdenite containing galena, realgar containing galena, chalcopyrite containing galena; B. a collector is added in the flotation process, and the collector includes ethylthiuram.

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