A foaming agent for harvesting, its preparation method, and its application

Abstract

This application discloses a collecting frother, its preparation method, and its application, belonging to the field of mineral processing flotation reagent technology. The collecting frother of this invention comprises the following raw materials in the indicated mass ratios: 25-35 parts of butylammonium black powder, 5-10 parts of ethyl xanthate propionitrile, 20-30 parts of thiocyanate propionitrile, 30-50 parts of ether alcohol frother, and 5-10 parts of alkyl mercaptan. Under the same mineral processing conditions, the collecting frother of this invention can significantly reduce the yield of rough concentrate, significantly increase the Ni grade and recovery rate of the rough concentrate, and significantly reduce the MgO content of the copper-nickel concentrate without affecting the copper-nickel grade and recovery rate. The resulting copper-nickel mixed concentrate has a nickel grade of over 7.5% and a nickel recovery rate of over 84.0%. Compared with the original process, the MgO content in the concentrate can be reduced by more than 3 percentage points.

Description

Technical Field

[0001] This application belongs to the field of mineral processing flotation reagents technology, and specifically relates to a collecting frother and its preparation method and application. Background Technology

[0002] Flotation frothers and collectors are two commonly used mineral processing agents. Flotation frothers are chemical agents added to the slurry during mineral processing that generate foam on the surface of mineral particles, thereby achieving mineral separation and extraction. Collectors, on the other hand, are chemical agents added to the slurry during mineral processing that adsorb onto the surface of minerals, achieving the purpose of mineral separation and extraction. Nickel ore is mainly divided into copper-nickel sulfide ore and laterite nickel oxide ore. Unlike the world's nickel resources, which are mainly laterite nickel ore, my country's nickel resources are mainly copper-nickel sulfide ore, often containing various associated cobalt, iron, and some precious metal elements. The beneficiation method for copper-nickel sulfide ore is mainly mixed flotation, which typically involves floating copper and nickel sulfide minerals together as a mixed concentrate under conditions that suppress easily floating gangue minerals. This concentrate is then subjected to copper-nickel separation or smelted into high-grade matte before further flotation separation. In the flotation process of copper-nickel ore, the selection of appropriate flotation frothers and collectors is crucial for the separation and extraction of useful minerals. As the mining of copper-nickel sulfide ores in China progresses, the difficulty of beneficiation of copper-nickel sulfide ores is increasing year by year. The main problems in the flotation of copper-nickel sulfide ores are the difficulty in suppressing magnesium silicate gangue minerals and the difficulty in liberating individual copper-nickel minerals. Therefore, actively developing new flotation technologies and using flotation collectors and frothers to increase the comprehensive utilization rate of copper-nickel sulfide ores is of great significance for the sustainable development of nickel resources.

[0003] This nickel-cobalt mine is the world's largest nickel sulfide deposit discovered since 2000, with proven nickel metal reserves of 1.183 million tons, associated copper of 238,000 tons, and associated cobalt of 43,000 tons. It is a super-large mafic magmatic segregation type nickel sulfide deposit. The mining and beneficiation system already in operation has a processing capacity of 5.61 million tons / year (17,000 tons / day). After primary crushing at the mine, the raw ore is transported to the roughing bin of the beneficiation plant via specialized belt conveyors. Initially, a flotation process of "two roughing, two scavenging, three cleaning + three cleaning scavenging" was adopted, which was later optimized to a "four roughing, three cleaning + three cleaning scavenging" flotation process. The beneficiation reagents used include water glass, copper sulfate, butyl xanthate, No. 2 oil, and CMC, ultimately yielding a mixed nickel-copper-cobalt concentrate product of 300,000 tons / year. The rock mass of a certain deposit is mainly composed of gabbro, olivine pyroxene, and orthopyroxene shale, among other lithofacies. Nickel-cobalt minerals primarily exist as primary ores such as high-magnesium nickel sulfide. Gangue minerals are high in content, easily become muddy, and exhibit good flotation properties. They are often closely interlocked with sulfide minerals in complex occurrences and have a close symbiotic relationship. Since trial production began in March 2023, the beneficiation system of this nickel-cobalt ore has consistently encountered problems such as sticky froth, poor fluidity, high-grade tailings from fine scavenging, significant metal loss, and low nickel ore recovery. For nickel ore flotation, using xanthate alone as a collector is difficult to achieve ideal technical indicators. Typically, xanthate-based, lipid-based, or compound lipid-based collectors are used in synergistic collection with xanthate to collect nickel minerals. The results of the liberation degree test showed that 69% of the nickel minerals lost in the tailings of a certain nickel-cobalt ore were in a state of individual liberation. Therefore, it is necessary to select a suitable collector frother to enhance the collection of nickel minerals. It is of great significance to develop a special collector frother that is affordable, has good flotation performance, and can be applied to the flotation of low-grade nickel-cobalt ores with a high content of easily muddy gangue minerals. Summary of the Invention

[0004] The purpose of this invention is to provide a frothing agent for collecting nickel ore, its preparation method, and its application, in order to solve the technical problems of severe metal loss, low nickel ore recovery rate, and poor fluidity in the flotation of nickel-cobalt ore in the prior art.

[0005] To achieve the above objectives, one embodiment of the present invention provides a collecting foaming agent comprising the following raw materials in parts by mass: 25-35 parts of butylammonium black powder, 5-10 parts of ethyl xanthate propionitrile, 20-30 parts of thiocyanate propionitrile, 30-50 parts of ether alcohol foaming agent, and 5-10 parts of alkyl mercaptan.

[0006] One preferred embodiment of the present invention is that the foaming agent comprises the following raw materials in parts by mass: 25-30 parts of butylammonium black powder, 5-7 parts of ethyl xanthate propionitrile, 25-30 parts of thiocyanate propionitrile, 35-40 parts of ether alcohol foaming agent, and 8-10 parts of alkyl mercaptan.

[0007] In one preferred embodiment of the present invention, the ether alcohol foaming agent is one or two of polyethylene glycol methyl ether, polyethylene glycol butyl ether, and tripropylene glycol methyl ether, and the butyl ammonium black powder is a liquid butyl ammonium black powder with a mass concentration of 70% or more.

[0008] The present invention also discloses a method for preparing a collecting foaming agent, comprising: mixing and stirring butylammonium black powder, ethyl xanthate propionitrile, thiocyanate propionitrile, ether alcohol foaming agent and alkyl thiol to obtain a collecting foaming agent.

[0009] One preferred embodiment of the present invention is a method for preparing a foaming agent, comprising: Mix the butammonium black powder and the ether alcohol foaming agent and stir for 5-10 minutes to obtain a mixed solution; Add ethyl xanthate propionitrile, thiopropionitrile and alkyl thiols to the mixed solution and stir for 10 min-30 min to obtain a homogeneous solution; The solution is filled, sealed, and left to stand to obtain a flotation frothing agent for low-grade nickel-cobalt ore.

[0010] The present invention also discloses an application of a collecting frother for use in the flotation of nickel-cobalt ore.

[0011] One preferred embodiment of the present invention is to use a collecting frother in the flotation of sulfide ores.

[0012] One preferred embodiment of the present invention includes the following steps in the flotation of nickel-cobalt ore: Preparation of nickel-cobalt ore slurry; Dispersant, copper sulfate, butyl xanthate and collector frother are added to nickel-cobalt ore slurry for flotation.

[0013] In one preferred embodiment of the present invention, flotation includes roughing, cleaning, and scavenging.

[0014] In one preferred embodiment of the present invention, the roughing process includes a first roughing process, a second roughing process, a third roughing process, and a fourth roughing process. In the first roughing process, the amount of collector-frothing agent added is 45 g / t-55 g / t relative to the amount of nickel-cobalt ore slurry. In the second roughing process, the amount of collector-frothing agent added is 15 g / t-25 g / t relative to the amount of nickel-cobalt ore slurry. The cleaning process includes a first cleaning process, a second cleaning process, and a third cleaning process. In the first cleaning process, the amount of collector-frothing agent added is 8 g / t-12 g / t relative to the amount of nickel-cobalt ore slurry. The scavenging process includes a first scavenging process, a second scavenging process, and a third scavenging process.

[0015] Compared with the prior art, this application has the following advantages: 1. The frother of this invention can significantly reduce the yield of rough concentrate and significantly improve the Ni grade and recovery rate of rough concentrate under the same mineral processing conditions. Without affecting the copper and nickel grade and recovery rate of the concentrate, it can significantly reduce the MgO content of copper and nickel concentrate. The resulting copper and nickel mixed concentrate has a nickel grade of more than 7.5% and a nickel recovery rate of more than 84.0%. Compared with the original process, the MgO content in the concentrate can be reduced by more than 3 percentage points.

[0016] 2. The frothing agent of the present invention combines butyl ammonium black powder, ethyl xanthate propionitrile, thiocyanate propionitrile, ether alcohol frothing agent and alkyl mercaptan in a certain proportion, so that the same type of agent, different type of agent and the same agent exert good synergistic effect and self-synergistic effect. Through the action mechanism of co-adsorption, cascade adsorption, hydrophobic association of nonpolar groups, and electronic conjugation of nonpolar groups, the flotation effect of the agent is improved and the production efficiency is increased.

[0017] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a process flow diagram of single-factor comparative flotation in Embodiment 3 of the present invention; Figure 2 This invention presents a closed-circuit flotation process flow diagram of the original on-site reagent system for a copper-nickel ore. Figure 3 This is a flowchart of a closed-circuit flotation process for a copper-nickel mine using the frother reagent system of this invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] 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.

[0022] This invention discloses a foaming agent for harvesting, comprising the following raw materials in parts by mass: 25-35 parts of butylammonium black powder, 5-10 parts of ethyl xanthate propionitrile, 20-30 parts of thiocyanate propionitrile, 30-50 parts of ether alcohol foaming agent, and 5-10 parts of alkyl mercaptan.

[0023] Preferably, the foaming agent comprises the following raw materials in parts by weight: 25-30 parts of butylammonium black powder, 5-7 parts of ethyl xanthate propionitrile, 25-30 parts of thiocyanate propionitrile, 35-40 parts of ether alcohol foaming agent, and 8-10 parts of alkyl mercaptan.

[0024] Furthermore, the ether alcohol foaming agent is one or two of polyethylene glycol methyl ether, polyethylene glycol butyl ether, and tripropylene glycol methyl ether, and the butyl ammonium black powder is a liquid butyl ammonium black powder with a mass concentration of 70% or more.

[0025] The present invention also discloses a method for preparing a collecting foaming agent, comprising: mixing and stirring butylammonium black powder, ethyl xanthate propionitrile, thiocyanate propionitrile, ether alcohol foaming agent and alkyl thiol to obtain a collecting foaming agent.

[0026] Preferably, the method for preparing the foaming agent includes: Step (1): Mix and stir the butylammonium black powder and ether alcohol foaming agent for 5 min-10 min to obtain a mixed solution; specifically, mix and stir the butylammonium black powder and ether alcohol foaming agent according to the ratio for 5 min-10 min to obtain a mixed solution; Step (2): Add ethyl xanthate propionitrile, thiopropionitrile and alkyl thiols to the mixed solution and stir for 10 min-30 min to obtain a homogeneous solution; specifically, add ethyl xanthate propionitrile, thiopropionitrile and alkyl thiols to the mixed solution according to the ratio and stir for 10 min-30 min to obtain a homogeneous transparent solution. Step (3): The solution is filled, sealed and left to stand to obtain a foaming agent; specifically, the solution in step (2) is filled, sealed and left to stand to obtain a foaming agent.

[0027] The present invention also discloses an application of a collecting frother for the flotation of nickel-cobalt ore, and further, the application of the collecting frother for the flotation of low-grade nickel-cobalt ore.

[0028] Preferably, the collecting frother is used in the flotation of sulfide ores; Furthermore, the frothing agent was used for the flotation of low-grade nickel-cobalt ores with a high content of easily mud-forming gangue minerals, and for the flotation of metal sulfide ores with a content of more than 20% of easily mud-forming gangue minerals.

[0029] The flotation process for nickel-cobalt ore is either a "two roughing, two scavenging, three cleaning + three cleaning scavenging" flotation process or a "four roughing, three cleaning + three cleaning scavenging" flotation process. Specifically, the flotation of nickel-cobalt ore includes the following steps: S1: Preparation of nickel-cobalt ore slurry; S2: Add dispersant, copper sulfate, butyl xanthate, and collector-frother to the nickel-cobalt ore slurry for flotation; wherein the flotation includes roughing, cleaning, and scavenging; preferably, the roughing includes first roughing, second roughing, third roughing, and fourth roughing, wherein the amount of collector-frother added in the first roughing is 45g / t-55g / t relative to the amount of nickel-cobalt ore slurry, and the amount of collector-frother added in the second roughing is 15g / t-25g / t relative to the amount of nickel-cobalt ore slurry; the cleaning includes first cleaning, second cleaning, and third cleaning, wherein the amount of collector-frother added in the first cleaning is 8g / t-12g / t relative to the amount of nickel-cobalt ore slurry; and the scavenging includes first scavenging, second scavenging, and third scavenging.

[0030] Example 1 A foaming agent for harvesting, comprising the following raw materials in parts by mass: 25 parts liquid butylammonium black powder, 10 parts ethyl xanthate propionitrile, 20 parts thiocyanate propionitrile, 40 parts ether alcohol foaming agent, and 5 parts alkyl mercaptan.

[0031] A method for preparing a collecting foaming agent includes the following steps: First, add 25 parts of liquid butylammonium black powder and 45 parts of ether alcohol foaming agent to a container, stir for 5 minutes to mix thoroughly and evenly to obtain a mixture; then, while stirring, slowly add 10 parts of ethyl xanthate propionitrile, 20-30 parts of thioazinon propionitrile, and 5 parts of alkyl mercaptan in sequence, and continue stirring for 15 minutes to form a homogeneous transparent solution; fill, seal, and let stand the above mixed solution to obtain the collecting foaming agent.

[0032] Example 2 A foaming agent for harvesting, comprising the following raw materials in parts by mass: 30 parts liquid butylammonium black powder, 5 parts ethyl xanthate propionitrile, 20 parts thiocyanate propionitrile, 35 parts ether alcohol foaming agent, and 10 parts alkyl mercaptan.

[0033] A method for preparing a collecting foaming agent includes the following steps: First, add 35 parts of liquid butylammonium black powder and 35 parts of ether alcohol foaming agent to a container, stir for 5 minutes to mix them thoroughly and evenly to obtain a mixture; then, while stirring, slowly add 5 parts of ethyl xanthate propionitrile, 25 parts of thioazinon propionitrile, and 10 parts of alkyl mercaptan in sequence, and continue stirring for 30 minutes to form a homogeneous transparent solution; fill, seal, and let stand the above mixed solution to obtain the collecting foaming agent.

[0034] Example 3 An application of a collecting frother: The collecting frother was applied to a nickel sulfide mineral for a single-factor comparative flotation test. The sample used was taken from a nickel-cobalt mine on-site and was a shallow surface ore.

[0035] The process flow of single-factor comparative flotation test is as follows: Figure 1 As shown, take 500g of ore sample, add 1000mL of water, add 400g / t of T20 dispersant, grind in a ball mill to a fineness of 72%-200 mesh, transfer to a flotation cell, add 150g / t of TC dispersant and 160g / t of copper sulfate under stirring, stir for 3 minutes, then add 20g / t of butyl xanthate and 50g / t of the A22 collector frother of this invention, stir for 3 minutes, then perform aeration and frothing flotation, flotation time is 4 minutes; then add 100g / t of copper sulfate and 50g / t of butyl xanthate to the slurry in sequence, stir for 3 minutes each, then perform a second roughing operation, flotation time is 3 minutes, and combine the froth from roughing I and roughing II to form a rough concentrate.

[0036] Samples of rough concentrate and tailings were sent for analysis separately.

[0037] Comparative Example 1 A single-factor comparative flotation test was conducted using traditional No. 2 oil, No. 43, butyl ammonium black powder, ester 105 and BQ-622 flotation frother and collector. The flotation process was the same as in Example 3.

[0038] Testing and Inspection Experiment 1: (1) Comparative Example 1, which uses conventional No. 2 oil, No. 43, butammonium black powder, ester 105 and BQ-622 flotation frother and collector, was compared with the collector and frother of the present invention under the same separation process and reagent system.

[0039] The ore samples, process flow and reagent system used in the experiment were the same as in Example 3. The rough concentrate and tailings were sent for analysis separately, and the test results are shown in Table 1.

[0040] Table 1: Results of Experiments on Selection and Dosage of Foaming Agents for Harvesting

[0041] As can be seen from Table 1, the A22 collector frother of this invention has significant advantages compared with 2# oil, 43#, butylammonium black reagent, ester 105, and BQ-622. Ester 105 can increase the recovery rate by 0.93%, but the rough concentrate yield is too high, and the Ni grade of the rough concentrate decreases. As a collector frother, the A22 reagent of this invention reduces the rough concentrate yield, increases the Ni grade of the rough concentrate by 0.48%, and increases the Ni recovery rate by 1.93%, with good flotation technical indicators. Therefore, the collector frother of this invention is selected to replace the 2# oil frother used on site as the collector frother for the flotation of this ore, and the optimal dosage for roughing is 50 g / t.

[0042] Experiment 2: Closed-circuit flotation tests were conducted on a nickel-cobalt ore using both on-site and new reagent systems. On-site pharmaceutical formulation test conditions and process flow are as follows: Figure 2 As shown, the closed-circuit beneficiation process is a "four roughing, three cleaning + three cleaning sweep" process: In the "four roughing" system, roughing I adds 300g / t of CMC, 100g / t of copper sulfate, 90g / t of butyl xanthate, and 50g / t of No. 2 oil, with a flotation time of 5min; roughing II adds 100g / t of CMC, 80g / t of copper sulfate, 30g / t of butyl xanthate, and 20g / t of No. 2 oil, with a flotation time of 4min; roughing III adds 20g / t of CMC, 20g / t of copper sulfate, and 30g / t of butyl xanthate, with a flotation time of 3min; and roughing IV adds 20g / t of CMC and 10g / t of butyl xanthate, with a flotation time of 3min. The rough concentrates from roughing processes I, II, III, and IV were combined and fed into a "three-cleansing + three-scavenging" cleaning system. In cleaning process I, 150 g / t of CMC, 200 g / t of water glass, 50 g / t of butyl xanthate, and 5 g / t of No. 2 oil were added, with a flotation time of 5 min. In cleaning process II, 80 g / t of CMC was added; in cleaning process III, 40 g / t of CMC was added; in scavenging process I, 80 g / t of CMC, 20 g / t of copper sulfate, and 15 g / t of butyl xanthate were added, with a flotation time of 3 min; in scavenging process II, 40 g / t of CMC, 20 g / t of copper sulfate, and 10 g / t of butyl xanthate were added; and in scavenging process III, 20 g / t of CMC and 10 g / t of butyl xanthate were added, with a flotation time of 3 min. The closed-circuit test results of the on-site reagent regime are shown in Table 2.

[0043] New drug formulation testing conditions and process flow, such as Figure 3As shown, the closed-circuit beneficiation process is a "four roughing, three cleaning + three cleaning sweep" process: In the "four roughing" system, roughing I adds 400g / t of T20 inhibitor, 113g / t of TC dispersant, 100g / t of copper sulfate, 80g / t of butyl xanthate, and 50g / t of the A22 collector frother of this invention, with a flotation time of 5min; roughing II adds 38g / t of TC dispersant, 80g / t of copper sulfate, 30g / t of butyl xanthate, and 20g / t of the A22 collector frother of this invention, with a flotation time of 4min; roughing III adds 8g / t of TC, 20g / t of copper sulfate, and 30g / t of butyl xanthate, with a flotation time of 3min; and roughing IV adds 8g / t of TC and 10g / t of butyl xanthate, with a flotation time of 3min. The rough concentrates from roughing processes I, II, III, and IV were combined and fed into a "three-cleansing + three-scavenging" cleaning system. In cleaning process I, 100 g / t of T20 inhibitor, 75 g / t of TC, 50 g / t of butyl xanthate, and 10 g / t of the A22 collector frother of this invention were added, with a flotation time of 5 min. In cleaning process II, 40 g / t of TC was added, and in cleaning process III, 20 g / t of TC was added, with a flotation time of 5 min. In scavenging process I, 40 g / t of TC, 20 g / t of copper sulfate, and 15 g / t of butyl xanthate were added, with a flotation time of 3 min. In scavenging process II, 40 g / t of CMC, 20 g / t of copper sulfate, and 15 g / t of butyl xanthate were added. In scavenging process III, 10 g / t of TC and 10 g / t of butyl xanthate were added, with a flotation time of 3 min. The closed-circuit test results of the new reagent system are shown in Table 2.

[0044] Table 2: Closed-circuit test results

[0045] As shown in Table 2, under the on-site reagent regime, the concentrate contains 7.29% Ni, 1.90% Cu, and 0.70% MgO, with a Ni recovery rate of 78.21% and a Cu recovery rate of 78.57%. The tailings from the scavenging process contain 0.51% Ni and 0.15% Cu, while the tailings contain 0.17% Ni and 0.04% Cu, resulting in a total Ni content of 0.22%. Under the new reagent regime, the concentrate contains 6.41% Ni, 1.52% Cu, and 0.90% MgO, with a Ni recovery rate of 83.17% and a Cu recovery rate of 81.52%. The tailings from the scavenging process contain 0.35% Ni and 0.10% Cu, while the tailings contain 0.15% Ni and 0.04% Cu, resulting in a total Ni content of 0.18%. Compared with the on-site reagent system, the new reagent system reduced the Ni grade in the concentrate by 0.88% and the Cu grade by 0.38%, increased the Ni recovery rate in the concentrate by 4.96% and the Cu recovery rate by 2.95%, reduced the Ni content in the tailings by 0.16%, reduced the Ni content in the tailings by 0.02%, and reduced the overall Ni content in the tailings by 0.04%. The experimental results show that the new reagent system can enhance the collection effect on fine-grained nickel and copper minerals in the slurry system, thereby effectively reducing the content of nickel and copper minerals in the tailings and improving the recovery rate of nickel and copper metals.

[0046] In summary, the frother of this invention can significantly reduce the yield of rough concentrate and significantly improve the Ni grade and recovery rate of rough concentrate under the same mineral processing conditions. It can also significantly reduce the MgO content of copper-nickel concentrate without affecting the copper-nickel grade and recovery rate of the concentrate. The resulting copper-nickel mixed concentrate has a nickel grade of more than 7.5% and a nickel recovery rate of more than 84.0%.

[0047] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A foaming agent for collecting foam, characterized in that, The raw materials include the following components in parts by weight: 25-35 parts of butylammonium black powder, 5-10 parts of ethyl xanthate propionitrile, 20-30 parts of thiocyanate propionitrile, 30-50 parts of ether alcohol foaming agent, and 5-10 parts of alkyl mercaptan.

2. The foaming agent as described in claim 1, characterized in that: The collecting foaming agent comprises the following raw materials in parts by weight: 25-30 parts of butylammonium black powder, 5-7 parts of ethyl xanthate propionitrile, 25-30 parts of thiocyanate propionitrile, 35-40 parts of ether alcohol foaming agent, and 8-10 parts of alkyl mercaptan.

3. A foaming agent as described in claim 1 or 2, characterized in that: The ether alcohol foaming agent is one or two of polyethylene glycol methyl ether, polyethylene glycol butyl ether, and tripropylene glycol methyl ether, and the butyl ammonium black powder is a liquid butyl ammonium black powder with a mass concentration of 70% or more.

4. A method for preparing a foaming agent according to any one of claims 1-3, characterized in that, include: The butylammonium black powder, ethyl xanthate propionitrile, thiocyanate propionitrile, ether alcohol foaming agent and alkyl thiol are mixed and stirred to obtain the collecting foaming agent.

5. The method for preparing a foaming agent as described in claim 4, characterized in that: The method for preparing the foaming agent includes: Mix the butammonium black powder and the ether alcohol foaming agent and stir for 5-10 minutes to obtain a mixed solution; Add ethyl xanthate propionitrile, thioazinon propionitrile and alkyl thiols to the mixed solution and stir for 10 min-30 min to obtain a homogeneous solution; The solution is filled, sealed, and allowed to stand to obtain a flotation frothing agent for low-grade nickel-cobalt ore.

6. The application of a foaming agent according to any one of claims 1-3, characterized in that: It was used for the flotation of nickel-cobalt ore.

7. The application of the foaming agent as described in claim 6, characterized in that: Frothing agents are used in the flotation of sulfide ores.

8. The application of the foaming agent as described in claim 6, characterized in that, The nickel-cobalt ore flotation includes the following steps: Preparation of nickel-cobalt ore slurry; Dispersant, copper sulfate, butyl xanthate and collector frother are added to nickel-cobalt ore slurry for flotation.

9. The application of the foaming agent as described in claim 8, characterized in that: The flotation process includes roughing, cleaning, and scavenging.

10. The application of the foaming agent as described in claim 8, characterized in that: The roughing process includes a first roughing process, a second roughing process, a third roughing process, and a fourth roughing process. In the first roughing process, the amount of collector frother added is 45 g / t-55 g / t relative to the amount of nickel-cobalt ore pulp. In the second roughing process, the amount of collector frother added is 15 g / t-25 g / t relative to the amount of nickel-cobalt ore pulp. The cleaning process includes a first cleaning process, a second cleaning process, and a third cleaning process. In the first cleaning process, the amount of collector frother added is 8 g / t-12 g / t relative to the amount of nickel-cobalt ore pulp. The scavenging process includes a first scavenging process, a second scavenging process, and a third scavenging process.

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