Nickel sulfide ore collecting agent and preparation method and application thereof

Abstract

The invention discloses a nickel sulfide ore collecting agent and a preparation method and application thereof, and belongs to the technical field of ore dressing. The nickel sulfide ore collecting agent comprises the following raw materials in percentage by mass: 70%-80% of alkyl dithiophosphinic acid, 10%-15% of alicyclic diketone dioxime and 8%-17% of a cosolvent. According to the nickel sulfide ore collecting agent, the alkyl dithiophosphinic acid and the alicyclic diketone dioxime can jointly act on the surface of nickel-containing ore and are mutually adsorbed in an interpenetrating mode, the synergistic interaction effect is achieved, and the floatability of the nickel ore difficult to float is improved; and meanwhile, the cosolvent ensures that the alkyl dithiophosphinic acid and the alicyclic diketone dioxime can be fully dissolved mutually and are more easily dispersed when being added into ore pulp, so that the action effect of the medicament is improved.

Description

Technical Field

[0001] This invention relates to the field of mineral processing technology, specifically to a nickel sulfide ore collector, its preparation method, and its application. Background Technology

[0002] Nickel is a strategic resource, a key alloying element in stainless steel, and is widely used in high-end equipment such as aero engines and gas turbines. It is also a core material for new energy and high-end manufacturing. Ternary lithium batteries (nickel-cobalt-manganese system) are core components of new energy vehicles and energy storage equipment, with nickel content typically exceeding 50% of the cathode material. As one of the main sources of nickel, the efficient development and utilization of nickel sulfide ore is of great significance. The primary method for recovering nickel sulfide ore is enrichment and recovery through flotation, and one of the most critical factors affecting its recovery rate is the nickel flotation collector.

[0003] Currently, the most commonly used collectors for nickel sulfide ore are xanthate collectors, such as butyl xanthate and pentoxanthate.

[0004] To enhance the collecting ability of xanthates, the industry uses collectors with longer carbon chains, such as 2-octyl xanthate. In addition, black oxide collectors are also commonly used as collectors for nickel sulfide ores, such as butylammonium black oxide and sodium isobutylene black oxide. To improve the selectivity and collecting ability of black oxides, researchers have developed a series of black oxide collectors with different alkoxy chain lengths by designing molecular structures. For example, O,O-bis(4-butoxybutyl)dithiophosphate has been shown to have better collecting ability for pyrite and can effectively reduce serpentine inclusions.

[0005] To enhance the collector performance of nickel sulfide ores, combined dosages are commonly used to improve the recovery of refractory nickel minerals. Examples include xanthate + black powder (butyl xanthate + butyl ammonium black powder), xanthate + thiocarbamate (pentyl xanthate + Z-200), and the combination of N-propyl-N-allyl-O-isobutyl thiocarbamate with butyl xanthate. However, in production practice, the nickel recovery rate remains low, indicating room for improvement in enhanced flotation collectors for nickel sulfide ores. Summary of the Invention

[0006] The purpose of this invention is to provide a nickel sulfide ore collector, its preparation method, and its application, in order to solve the technical problem of low nickel recovery rate in nickel sulfide ore in the prior art.

[0007] To achieve the above objectives, one embodiment of the present invention provides a nickel sulfide ore collector comprising the following raw materials in the following mass percentage ratios: 70%-80% alkyl dithiophosphonic acid, 10%-15% alicyclic diketone dioxime, and 8%-17% co-solvent.

[0008] In one preferred embodiment of the present invention, the chemical formula of the hydrocarbon dithiophosphonic acid is R2PSSH, wherein R is a hydrocarbon group and the hydrocarbon group has ≥5 carbon atoms.

[0009] In one preferred embodiment of the present invention, the alkyl dithiophosphonic acid includes either diisooctyl dithiophosphonic acid or diisopentyl dithiophosphonic acid.

[0010] In one preferred embodiment of the present invention, the oxime group in the alicyclic diketone dioxime is ortho-positioned.

[0011] One preferred embodiment of the present invention is an alicyclic diketone dioxime, including 1,2-cyclohexanedione dioxime.

[0012] In one preferred embodiment of the present invention, the co-solvent is an alcohol compound.

[0013] In one preferred embodiment of the present invention, the co-solvent is either isopropanol or n-butanol.

[0014] Based on the disclosure of this invention Based on the nickel sulfide ore collector disclosed in this invention, this invention also discloses a method for preparing the nickel sulfide ore collector, comprising: mixing a hydrocarbon dithiophosphonic acid, an alicyclic diketone dioxime, and a co-solvent to obtain the nickel sulfide ore collector.

[0015] The present invention also discloses the application of a nickel sulfide ore collector for the flotation of nickel sulfide ore.

[0016] One preferred embodiment of the present invention, the flotation of nickel sulfide ore, includes the following steps: Preparation of nickel sulfide ore slurry; Adding butyl xanthate, collector, and frother to nickel sulfide ore slurry yields a mixture. The mixture is subjected to flotation.

[0017] In one preferred embodiment of the present invention, the foaming agent includes at least one of methyl isobutyl methanol and No. 2 oil.

[0018] In one preferred embodiment of the present invention, flotation includes roughing, cleaning and scavenging, with a collector added during the roughing and scavenging processes.

[0019] In summary, the beneficial effects of the present invention are as follows: 1. In the nickel sulfide ore collector of the present invention, the hydrocarbon dithiophosphonic acid and the alicyclic diketone dioxime can work together on the surface of nickel-bearing minerals, interpenetrating and adsorbing each other, playing a synergistic role and increasing the floatability of difficult-to-float nickel ores; at the same time, the co-solvent ensures that the hydrocarbon dithiophosphonic acid and the alicyclic diketone dioxime can be fully miscible, making it easier to disperse and act in the slurry, thus improving the effect of the agent.

[0020] 2. In the nickel sulfide ore collector of this invention, the alkyl dithiophosphonic acid (R2PSSH) consists of a fixative group (PSSH) and a hydrophobic group (two alkyl groups R). The fixative group acts on the surface of nickel-bearing minerals, while the hydrophobic group enhances the hydrophobicity of the mineral surface, thereby improving its floatability. Furthermore, R2PSSH can dissociate into the anion R2P(=S)S-, where both the sulfur atoms (S- and S=) possess lone pairs of electrons, allowing them to act as bidentate ligands to chelate with metallic nickel. The P=S double bond in this structure gives the sulfur atoms a greater negative charge, enhancing their coordination ability and making it easier for them to interact with the surface of nickel-bearing minerals. Simultaneously, this invention requires the alkyl group (R) to have ≥5 carbon atoms. This increases the hydrophobicity of the hydrophobic end of the agent, and the electron-donating effect of the alkyl group (such as isooctyl) further increases the electron density of the sulfur atoms, thereby enhancing the interaction between the fixative group and the surface of nickel sulfide minerals and strengthening the floatability of difficult-to-float nickel sulfide ores.

[0021] 3. In the nickel sulfide ore collector of this invention, the alicyclic diketone dioxime can be 1,2-cyclohexanedione dioxime. 1,2-cyclohexanedione dioxime contains two oxime groups (-C=N-OH) in adjacent positions (1,2 positions), forming an α-dioxime structure. The nitrogen atom and deprotonated oxygen atom of each oxime group can provide lone pair electrons for coordination. The tetradentate chelating action of its dioxime groups can react with nickel ions to form a highly stable nickel complex with a rigid cyclic structure. This chelating action allows 1,2-cyclohexanedione dioxime to firmly adhere to the surface of nickel-bearing minerals, while the cyclohexyl group has good hydrophobicity, increasing the hydrophobicity of the mineral surface. This effect is far stronger than the linear flexible structure of the previously reported nickel collector, dibutanediol dioxime.

[0022] 4. This invention uses a combination of hydrocarbon dithiophosphonic acid and alicyclic diketone dioxime as a collector for nickel sulfide ore, which can be used in conjunction with xanthate-based reagents to improve the flotation recovery rate of nickel sulfide ore.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention will be apparent from the effects described in the description and the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the flotation process for nickel sulfide ore in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0027] Nickel is a strategic resource, a key alloying element in stainless steel, and is widely used in high-end equipment such as aero engines and gas turbines. It is also a core material for new energy and high-end manufacturing. Ternary lithium batteries (nickel-cobalt-manganese system) are core components of new energy vehicles and energy storage equipment, with nickel content typically exceeding 50% of the cathode material. As one of the main sources of nickel, the efficient development and utilization of nickel sulfide ore is of great significance. The primary method for recovering nickel sulfide ore is enrichment and recovery through flotation, and one of the most critical factors affecting its recovery rate is the nickel flotation collector.

[0028] Currently, the most commonly used collectors for nickel sulfide ore are xanthate collectors, such as butyl xanthate and pentachlorophenate. To enhance the collector performance of nickel sulfide ore, a combination of different dosages is often used to strengthen the recovery of refractory nickel minerals, such as xanthate + dichlorophenate (butyl xanthate + butylammonium dichlorophenate) or xanthate + thiocyanate (pentyl xanthate + Z-200). However, in production practice, the problem of low nickel recovery rate still exists, and there is still room for optimization of enhanced flotation collectors for nickel sulfide ore.

[0029] Therefore, the present invention provides a nickel sulfide ore collector comprising the following raw materials in the following mass percentages: 70%-80% alkyl dithiophosphonic acid, 10%-15% alicyclic diketone dioxime, and 8%-17% cosolvent.

[0030] The alkyl dithiophosphonic acid has the chemical formula R2PSSH, where R is a hydrocarbon group with ≥5 carbon atoms. Limiting the number of carbon atoms in the hydrocarbon group to ≥5 serves two purposes: firstly, it increases the hydrophobicity of the hydrophobic end of the reagent; secondly, the electron-donating effect of the hydrocarbon group (such as isooctyl) further increases the electron density of sulfur atoms, thereby enhancing the interaction between the fixophilic group and the surface of nickel sulfide minerals and strengthening the floatability of refractory nickel sulfide ores. In an optional embodiment, the alkyl dithiophosphonic acid includes either diisooctyl dithiophosphonic acid or diisopentyl dithiophosphonic acid.

[0031] In an optional embodiment, the oxime group in the alicyclic diketone dioxime is ortho-positioned; preferably, the alicyclic diketone dioxime includes 1,2-cyclohexanedione dioxime. 1,2-cyclohexanedione dioxime contains two oxime groups (-C=N-OH) in adjacent positions (1,2 positions), forming an α-dioxime structure. The nitrogen atom and deprotonated oxygen atom of each oxime group can provide lone pair electrons for coordination. The tetradentate chelating action of its dioxime groups can react with nickel ions to form a highly stable nickel complex with a rigid cyclic structure. This chelating action allows 1,2-cyclohexanedione dioxime to adhere firmly to the surface of nickel-containing minerals, while the cyclohexyl group has good hydrophobicity, increasing the hydrophobicity of the mineral surface. This effect is far stronger than the linear flexible structure of the previously reported nickel collector, dibutanediol dioxime.

[0032] In an optional embodiment, the co-solvent is an alcohol compound, preferably either isopropanol or n-butanol.

[0033] In one optional implementation, the mass percentage of the alkyl dithiophosphonic acid may be 70%, 75%, or 80%.

[0034] In one optional implementation, the mass percentage of the alicyclic diketone dioxime may be 10%, 12%, or 15%.

[0035] In one optional implementation, the mass percentage of the co-solvent can be selected as 8%, 10%, 13%, 15%, or 17%.

[0036] Based on the nickel sulfide ore collector disclosed in this invention, this invention also discloses a method for preparing the nickel sulfide ore collector, comprising: mixing hydrocarbon dithiophosphonic acid, alicyclic diketone dioxime and a co-solvent in the above proportions to obtain the nickel sulfide ore collector.

[0037] The present invention also discloses the application of a nickel sulfide ore collector for the flotation of nickel sulfide ore.

[0038] In one optional implementation, the flotation of nickel sulfide ore includes the following steps: Step (1): Prepare nickel sulfide slurry; specifically, crush and grind the nickel sulfide ore to obtain nickel sulfide slurry, the slurry concentration of copper sulfide slurry is 25%-35%, and the mineral fineness of the copper sulfide slurry is ≤0.074mm, accounting for 65%-75%; In one optional implementation, the concentration of the nickel sulfide slurry can be selected as 25%, 30%, or 35%.

[0039] In one optional implementation, the proportion of minerals with a fineness of ≤0.074mm in the nickel sulfide slurry can be selected as 65%, 70%, or 75%. Step (2): Add xanthate, collector and frother to nickel sulfide slurry to obtain a mixture; specifically, add xanthate (40-80g / t), collector (20-30g / t) and frother (15-30g / t) to the nickel sulfide slurry prepared in step (1) and stir for 3 minutes to obtain a mixture; In an optional embodiment, the foaming agent includes at least one of methyl isobutyl methanol (MIBC) and No. 2 oil; Step (3): Flotation of the mixture.

[0040] In one alternative implementation, flotation includes roughing, cleaning, and sweeping. In one optional implementation, the selection process includes 2-3 selections, and the scanning process includes 2-3 scannings.

[0041] In one optional implementation, the selection includes a first selection and a second selection, and the scanning includes a first scanning and a second scanning; In an alternative implementation, a collector is added during the roughing and scavenging processes.

[0042] A schematic diagram of the flotation process for nickel sulfide ore in this invention is shown below. Figure 1 As shown. From Figure 1 As can be seen from the process, nickel sulfide ore is ground to produce nickel sulfide slurry, and then the prepared nickel sulfide slurry is subjected to flotation. The specific flotation process is as follows: First, xanthate, collector and frother are added to rough the nickel sulfide slurry to obtain rough concentrate and rough tailings. The rough concentrate is then finely treated to obtain nickel concentrate. The rough tailings are then scavenged to obtain tailings.

[0043] The process of refining the rougher concentrate includes: performing a first refining process on the rougher concentrate to obtain a first refined concentrate and a first refined tailings; performing a second refining process on the obtained first refined concentrate to obtain a second refined concentrate (i.e., nickel concentrate) and a second refined tailings; returning the first refined tailings to the rougher process and returning the second refined tailings to the first refining process.

[0044] The scavenging of the roughing tailings includes: adding xanthate and collector to perform a first scavenging of the roughing tailings to obtain a first scavenged concentrate and a first scavenged tailings; adding xanthate and collector again to perform a second scavenging of the first scavenged tailings to obtain a second scavenged concentrate and a second scavenged tailings (i.e., tailings), wherein the first scavenged concentrate is returned to the roughing process, and the second scavenged concentrate is returned to the first scavenging process.

[0045] Preferably, during the roughing process, the mass ratio of butyl xanthate to nickel sulfide ore pulp is (40g-80g):1t. For example, the mass ratio of butyl xanthate to nickel sulfide ore pulp can be selected as 40g:1t, 50g:1t, 60g:1t, 70g:1t, or 80g:1t. The mass ratio of collector to nickel sulfide ore pulp is (20g-30g):1t. For example, the mass ratio of collector to nickel sulfide ore pulp can be selected as 20g:1t, 25g:1t, or 30g:1t. The mass ratio of frother to nickel sulfide ore pulp is (15g-30g):1t. For example, the mass ratio of frother to nickel sulfide ore pulp can be selected as 15g:1t, 20g:1t, 25g:1t, or 30g:1t.

[0046] Furthermore, no chemicals are added during the selection process.

[0047] Preferably, in the first scavenging process, the mass ratio of the amount of xanthate added to the roughing tailings is (10g-30g):1t. For example, it can be selected that the mass ratio of the amount of xanthate added to the roughing tailings in the first scavenging process is 10g:1t, 20g:1t, or 30g:1t; and the mass ratio of the amount of collector added to the roughing tailings is (5g-15g):1t. For example, it can be selected that the mass ratio of the amount of collector added to the roughing tailings in the first scavenging process is 5g:1t, 10g:1t, or 15g:1t.

[0048] Preferably, in the second scavenging process, the mass ratio of the amount of butyl xanthate added to the tailings from the first scavenging process is (5g-15g):1t. For example, it can be selected that the mass ratio of the amount of butyl xanthate added to the tailings from the first scavenging process is 5g:1t, 10g:1t, or 15g:1t. The mass ratio of the amount of collector added to the tailings from the first scavenging process is (1g-10g):1t. For example, it can be selected that the mass ratio of the amount of collector added to the tailings from the first scavenging process is 1g:1t, 5g:1t, or 10g:1t.

[0049] Example 1 A nickel sulfide ore collector comprises the following raw materials in the following mass ratio: 80% alkyl dithiophosphonic acid, 10% alicyclic diketone dioxime, and 10% co-solvent; wherein the alkyl dithiophosphonic acid is diisooctyl dithiophosphonic acid, the alicyclic diketone dioxime is 1,2-cyclohexanedione dioxime, and the co-solvent is n-butanol.

[0050] A method for preparing a nickel sulfide ore collector includes: mixing diisooctyl dithiophosphonic acid, 1,2-cyclohexanedione dioxime and n-butanol in a mass ratio of 80:10:10 to obtain the nickel sulfide ore collector.

[0051] An application of a nickel sulfide ore collector for the flotation of nickel sulfide ore, wherein the nickel sulfide ore contains 0.75% nickel and the main nickel-bearing minerals are pyrrhotite and pyrrhotite, includes the following steps: grinding the nickel sulfide ore to obtain a nickel sulfide slurry, and then flotating the nickel sulfide slurry, wherein the mass fraction of ore with a particle size ≤0.074mm in the ore after grinding is 70%.

[0052] The flotation of nickel sulfide ore pulp includes the following steps: First, butyl xanthate, collector, and frother (methyl isobutyl methanol) are added to rough the nickel sulfide ore pulp. The mass ratio of butyl xanthate to nickel sulfide ore pulp is 60 g: 1 t, the mass ratio of collector to nickel sulfide ore pulp is 20 g: 1 t, and the mass ratio of frother to nickel sulfide ore pulp is 15 g: 1 t, to obtain roughing concentrate and roughing tailings. The roughing concentrate is further refined, and the roughing tailings are scavenged. The refining of the roughing concentrate (without the addition of reagents) includes: a first refining process to obtain a first refined concentrate and a first refined tailings; a second refining process to obtain a second refined concentrate (i.e., nickel concentrate) and a second refined tailings; the first refined tailings are returned to the roughing process, and the second refined tailings are returned to the first refining process. The roughing tailings are scavenged, including: adding xanthate and a collector to perform a first scavenging of the roughing tailings, with the mass ratio of xanthate added to roughing tailings being 20g:1t and the mass ratio of collector added to roughing tailings being 10g:1t, to obtain a first scavenged concentrate and a first scavenged tailings; then adding xanthate and a collector again to perform a second scavenging of the first scavenged tailings, with the mass ratio of xanthate added to the first scavenged tailings being 10g:1t and the mass ratio of collector added to the first scavenged tailings being 5g:1t, to obtain a second scavenged concentrate and a second scavenged tailings (i.e., tailings); wherein, the first scavenged concentrate is returned to the roughing process, and the second scavenged concentrate is returned to the first scavenging process.

[0053] The nickel concentrate after flotation was tested. The grade of the nickel concentrate was tested by inductively coupled plasma (IPS) method. The test results were: the grade of nickel concentrate was 10.11%, and the beneficiation recovery rate (nickel concentrate grade × nickel concentrate yield / raw ore grade) was 85.56%.

[0054] Example 2 A nickel sulfide ore collector comprises the following raw materials in the following mass ratio: 70% alkyl dithiophosphonic acid, 15% alicyclic diketone dioxime, and 15% co-solvent; wherein the alkyl dithiophosphonic acid is diisooctyl dithiophosphonic acid, the alicyclic diketone dioxime is 1,2-cyclohexanedione dioxime, and the co-solvent is n-butanol.

[0055] A method for preparing a nickel sulfide ore collector includes: mixing diisooctyl dithiophosphonic acid, 1,2-cyclohexanedione dioxime and n-butanol in a mass ratio of 70:15:15 to obtain the nickel sulfide ore collector.

[0056] An application of a nickel sulfide ore collector for the flotation of nickel sulfide ore, wherein the nickel sulfide ore contains 0.75% nickel and the main nickel-bearing minerals are pyrrhotite and pyrrhotite, includes the following steps: grinding the nickel sulfide ore to obtain a nickel sulfide slurry, and then flotating the nickel sulfide slurry, wherein the mass fraction of ore with a particle size ≤0.074mm in the ore after grinding is 70%.

[0057] The flotation of nickel sulfide ore pulp includes the following steps: First, butyl xanthate, collector, and frother (methyl isobutyl methanol) are added to rough the nickel sulfide ore pulp. The mass ratio of butyl xanthate to nickel sulfide ore pulp is 60 g: 1 t, the mass ratio of collector to nickel sulfide ore pulp is 20 g: 1 t, and the mass ratio of frother to nickel sulfide ore pulp is 15 g: 1 t, to obtain roughing concentrate and roughing tailings. The roughing concentrate is further refined, and the roughing tailings are scavenged. The refining of the roughing concentrate (without the addition of reagents) includes: a first refining process to obtain a first refined concentrate and a first refined tailings; a second refining process to obtain a second refined concentrate (i.e., nickel concentrate) and a second refined tailings; the first refined tailings are returned to the roughing process, and the second refined tailings are returned to the first refining process. The roughing tailings are scavenged, including: adding xanthate and a collector to perform a first scavenging of the roughing tailings, with the mass ratio of xanthate added to roughing tailings being 20g:1t and the mass ratio of collector added to roughing tailings being 10g:1t, to obtain a first scavenged concentrate and a first scavenged tailings; then adding xanthate and a collector again to perform a second scavenging of the first scavenged tailings, with the mass ratio of xanthate added to the first scavenged tailings being 10g:1t and the mass ratio of collector added to the first scavenged tailings being 5g:1t, to obtain a second scavenged concentrate and a second scavenged tailings (i.e., tailings); wherein, the first scavenged concentrate is returned to the roughing process, and the second scavenged concentrate is returned to the first scavenging process.

[0058] The copper concentrate after flotation in Example 2 was tested using the test method in Example 1. The test results were as follows: the grade of nickel concentrate was 10.23%, and the beneficiation recovery rate (nickel concentrate grade × nickel concentrate yield / raw ore grade) was 85.43%.

[0059] Comparative Example 1 This comparative example discloses a nickel sulfide ore collector, which is basically the same as that in Example 1, except that it does not contain a co-solvent. Specifically, it includes the following raw materials in the following mass ratio: 80% alkyl dithiophosphonic acid and 20% alicyclic diketone dioxime, wherein the alkyl dithiophosphonic acid is diisooctyl dithiophosphonic acid and the alicyclic diketone dioxime is 1,2-cyclohexanedione dioxime.

[0060] This comparative example also discloses a method for preparing a nickel sulfide ore collector, comprising: mixing diisooctyl dithiophosphonic acid and 51,2-cyclohexanedione dioxime at a mass ratio of 80:20 to obtain a nickel sulfide ore collector.

[0061] This comparative example also discloses the application of a nickel sulfide ore collector for the flotation of nickel sulfide ore. The flotation method for nickel sulfide ore in this comparative example is the same as that in Example 1.

[0062] Using the same method as in Example 1, the nickel concentrate obtained in this comparative example was tested, and the nickel concentrate grade was found to be 10.02%, and the beneficiation recovery rate (nickel concentrate grade × nickel concentrate yield / raw ore grade) was 84.78%.

[0063] Comparative Example 2 This comparative example discloses a nickel sulfide ore collector, which is basically the same as that in Example 1, except that it does not contain alicyclic diketone dioxime. Specifically, it includes the following raw materials in the following mass ratio: 80% alkyl dithiophosphonic acid and 20% co-solvent, wherein the alkyl dithiophosphonic acid is diisooctyl dithiophosphonic acid and the co-solvent is n-butanol.

[0064] This comparative example also discloses a method for preparing a nickel sulfide ore collector, comprising: mixing diisooctyl dithiophosphonic acid and n-butanol at a mass ratio of 80:20 to obtain a nickel sulfide ore collector.

[0065] This comparative example also discloses the application of a nickel sulfide ore collector for the flotation of nickel sulfide ore. The flotation method for nickel sulfide ore in this comparative example is the same as that in Example 1.

[0066] Using the same method as in Example 1, the nickel concentrate obtained in this comparative example was tested, and the nickel concentrate grade was found to be 9.87%, and the beneficiation recovery rate (nickel concentrate grade × nickel concentrate yield / raw ore grade) was 84.78%.

[0067] Comparative Example 3 This comparative example discloses a nickel sulfide ore collector that, compared to Example 1, does not contain a collector but replaces it with an equal amount of butyl xanthate.

[0068] This comparative example also discloses the application of a nickel sulfide ore collector for the flotation of nickel sulfide ore. The flotation method for nickel sulfide ore in this comparative example is the same as that in Example 1.

[0069] Using the same method as in Example 1, the nickel concentrate obtained in this comparative example was tested, and the nickel concentrate grade was found to be 9.95%, and the beneficiation recovery rate (nickel concentrate grade × nickel concentrate yield / raw ore grade) was 84.35%.

[0070] In summary, through the above examples and comparative examples, it can be seen that the nickel sulfide ore collector of the present invention can work together with hydrocarbon dithiophosphonic acid and alicyclic diketone dioxime on the surface of nickel-bearing minerals, interpenetrating and adsorbing each other to achieve a synergistic effect and increase the floatability of difficult-to-float nickel ores. At the same time, the co-solvent ensures that hydrocarbon dithiophosphonic acid and alicyclic diketone dioxime are fully miscible, making it easier to disperse and act in the slurry, thus improving the effect of the agent.

[0071] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A collector for nickel sulfide ore, characterized in that, The nickel sulfide ore collector comprises the following raw materials in the following mass percentages: 70%-80% alkyl dithiophosphonic acid, 10%-15% alicyclic diketone dioxime, and 8%-17% co-solvent.

2. The nickel sulfide ore collector as described in claim 1, characterized in that: The chemical formula of the hydrocarbon dithiophosphonic acid is R2PSSH, where R is a hydrocarbon group and the hydrocarbon group has ≥5 carbon atoms.

3. A nickel sulfide ore collector as described in claim 1 or 2, characterized in that: The alkyl dithiophosphonic acid includes either diisooctyl dithiophosphonic acid or diisopentyl dithiophosphonic acid.

4. The nickel sulfide ore collector as described in claim 1, characterized in that: The oxime group in the alicyclic diketone dioxime is ortho-positioned.

5. A nickel sulfide ore collector as described in claim 1 or 4, characterized in that: The alicyclic diketone dioximes include 1,2-cyclohexanedione dioxime.

6. The nickel sulfide ore collector as described in claim 1, characterized in that: The co-solvent is an alcohol compound.

7. The nickel sulfide ore collector according to claim 6, characterized in that: The co-solvent is either isopropanol or n-butanol.

8. A method for preparing a nickel sulfide ore collector according to any one of claims 1-7, characterized in that, include: A nickel sulfide ore collector is obtained by mixing a hydrocarbon dithiophosphonic acid, an alicyclic diketone dioxime, and a co-solvent.

9. The application of a nickel sulfide ore collector according to any one of claims 1-7, characterized in that: It was used for the flotation of nickel sulfide ore.

10. The application of the nickel sulfide ore collector as described in claim 9, characterized in that: The flotation of the nickel sulfide ore includes the following steps: Preparation of nickel sulfide ore slurry; Adding butyl xanthate, collector, and frother to nickel sulfide ore slurry yields a mixture. The mixture is subjected to flotation.

11. The application of the nickel sulfide ore collector as described in claim 10, characterized in that: The foaming agent includes at least one of methyl isobutyl methanol and No. 2 oil.

12. The application of the nickel sulfide ore collector as described in claim 10, characterized in that: The flotation process includes roughing, cleaning, and scavenging, with collectors added during the roughing and scavenging processes.

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