A copper-molybdenum sulfide ore mixed flotation device and method

Abstract

The present application relates to the technical field of mineral flotation, and particularly relates to a sulfide copper-molybdenum ore mixed flotation device and method.A sulfide copper-molybdenum ore mixed flotation device is used for froth flotation of ore pulp, and comprises a main body, an impeller mechanism and a scraper mechanism, the impeller mechanism is arranged at the center of the main body, the impeller mechanism stirs liquid in the main body and generates micro-nano bubbles, and further comprises: a feeding mixing mechanism, at least one group of which is arranged between the impeller mechanism and the scraper mechanism, and comprises a mixing shell, a pulp inlet disc, a mixing pipe and a collector storage assembly.A confluence mixing mechanism is arranged in the mixing shell and comprises a confluence plate and a multidirectional mixing assembly.The sulfide copper-molybdenum ore mixed flotation device provided by the present application can ensure the flotation effect while reducing the amount of collector used.Furthermore, the present application further adjusts the proportion of the collector, improves the adhesion selectivity of copper and molybdenum minerals, and thus reduces the amount of composite collector required while ensuring the flotation effect.

Description

Technical Field

[0001] This invention relates to the field of mineral flotation technology, and in particular to a mixed flotation apparatus and method for copper-molybdenum sulfide ore. Background Technology

[0002] Flotation is a mineral processing method that separates minerals based on differences in their surface physicochemical properties. Before flotation, the ore must be ground to the particle size required for flotation, ensuring that the valuable minerals are essentially liberated for separation. Flotation reagents are also added. During flotation, air is introduced into the pulp, creating numerous air bubbles. Particles that are not easily wetted by water, commonly known as hydrophobic minerals, adhere to these bubbles and rise to the surface, forming a mineralized froth layer. Particles that are easily wetted by water, commonly known as hydrophilic minerals, do not adhere to the bubbles and remain in the pulp. The mineralized froth is then removed, thus achieving the separation process.

[0003] Currently, traditional collectors such as xanthate, dimethicone, and kerosene are mainly used in the flotation process of copper-molybdenum sulfide ores. However, with the decline in ore grade and the increase in associated minerals, traditional collectors suffer from poor selectivity and high reagent dosage. Furthermore, the addition of collectors typically involves prolonged mixing using premixing equipment, which is not only energy-intensive and requires extended mixing, but also results in uneven collector distribution due to the minerals at the collector addition point adsorbing more collector compared to other locations, affecting subsequent flotation results. Additionally, premixing equipment suffers from poor production continuity in large-scale production, unable to adapt to changes in pulp flow rate, thus failing to meet the demands for efficient, economical, and environmentally friendly mineral processing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a mixed flotation device and method for copper-molybdenum sulfide ore, which solves the problems of poor selectivity, high reagent dosage and insufficient adaptability of existing copper-molybdenum sulfide ore flotation processes.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a mixed flotation device for copper-molybdenum sulfide ore, used for froth flotation of ore slurry, including a main body, an impeller mechanism, and a scraper mechanism. The impeller mechanism is located in the center of the main body. The impeller mechanism stirs the liquid inside the main body and generates micro-nano bubbles. The micro-nano bubbles carry the target minerals in the ore slurry to the surface and flow into an overflow tank surrounding the main body under the action of the scraper mechanism. The device also includes:

[0006] The feeding mixing mechanism is arranged between the impeller mechanism and the scraper mechanism and comprises a mixing shell, a pulp feeding disc, a mixing pipe and a collector reagent storage assembly. The pulp feeding disc, the mixing pipe and the collector reagent storage assembly are arranged in the mixing shell, and the mixing shell is divided into a pulp feeding area and a mixing area by the pulp feeding disc. The mixing shell is provided with a pulp feeding port, and the pulp feeding disc is provided with a plurality of pulp distribution ports. The mixing pipe is in communication with the pulp feeding area through the pulp distribution ports. The feeding pipe of the collector reagent storage assembly penetrates through the pulp feeding disc and extends out of the mixing shell. The mixing pipe is arranged around the collector reagent storage assembly. The side wall of the mixing pipe is provided with a connecting channel. The collector reagent storage assembly is in communication with the mixing pipe through the connecting channel. The collector reagent storage assembly transports the composite collector into the mixing pipe through the connecting channel by pressure difference.

[0007] The confluence mixing mechanism is arranged in the mixing shell and comprises a confluence plate and a multidirectional mixing assembly. The confluence plate is arranged at the end of the mixing pipe and is in communication with the mixing pipe. The confluence plate divides the mixing area into a confluence cavity. The confluence cavity is used for collecting and mixing the mixed liquid of the ore pulp and the composite collector and then spraying out the mixed liquid. The multidirectional mixing assembly is arranged at the top of the confluence cavity and vertically extends downward. The multidirectional mixing assembly rotates and stirs the mixed liquid in the confluence cavity in the horizontal and vertical directions.

[0008] In an embodiment, the mixing pipe comprises a mixing section and a flow guide section. The mixing section has a mixing cavity which is first contracted and then expanded. The connecting channel is located at the position with the smallest diameter of the mixing cavity. The flow guide section is internally provided with a corrugated flow channel. The ore pulp and the composite collector flow along the corrugated flow channel after being mixed in the mixing section.

[0009] In an embodiment, the corrugated flow channel is provided with at least two groups. The corrugated flow channels are repeatedly separated and intersected along the length direction of the flow guide section. The intersection points of the corrugated flow channels are located on the central axis of the flow guide section.

[0010] In an embodiment, the multidirectional mixing assembly comprises a driving motor, a driving rod, a main stirring paddle and a side stirring paddle group. The driving rod is arranged at the output end of the driving motor. The main stirring paddle is arranged at the end of the driving rod away from the driving motor. The side stirring paddle group is arranged at the middle part of the driving rod. The side stirring paddle group comprises a first side rod, a second side rod and a side paddle blade. The first side rod and the second side rod are on the same straight line. The first side rod and the second side rod horizontally extend to both sides from the driving rod. The side paddle blade is arranged at the end of the first side rod or the second side rod. A driving gear set is sleeved on the driving rod. The driving gear set drives the first side rod and the second side rod to rotate in opposite directions.

[0011] In an embodiment, the driving gear set comprises a fixed frame, a driving bevel gear, a first bevel gear and a second bevel gear; the fixed frame is connected with the top of the converging cavity, the driving bevel gear, the first bevel gear and the second bevel gear are rotatably connected with the fixed frame; the driving bevel gear is sleeved on the driving rod, the first bevel gear and the second bevel gear are respectively arranged on the two sides of the driving rod and are engaged with the driving bevel gear, the first bevel gear is drivingly connected with the first side rod, and the second bevel gear is drivingly connected with the second side rod.

[0012] In an embodiment, the collector storage assembly comprises a liquid storage tank body, a connecting bellow and an ultrasonic oscillator, the liquid storage tank body has a liquid storage cavity therein, the ultrasonic oscillator is arranged at the bottom of the liquid storage cavity and vertically extends upward, and the two ends of the connecting bellow are sealingly connected with the liquid storage cavity and the connecting channel.

[0013] In an embodiment, the flow guiding impact mechanism is further arranged at the bottom of the main body and below the converging mixing mechanism.

[0014] The application further provides a copper-molybdenum sulfide ore mixed flotation method, which adopts any of the above copper-molybdenum sulfide ore mixed flotation devices, and the flotation steps are as follows:

[0015] S1, preparing a composite collector, and feeding the composite collector into the collector storage assembly; the raw materials of the composite collector include alkoxycarbonyl alkyl dithiocarbamic acid ester, butyl xanthate, allyl sulfonamide, kerosene, pine oil and an activator;

[0016] S2, grinding the ore, and grinding the ore to a particle size of less than 200 mesh, accounting for 60-80%; adding water to adjust the concentration of the ore slurry to 20-40%, and the pH value to 10-11;

[0017] S3, feeding the ore slurry into the copper-molybdenum sulfide ore mixed flotation device, and the tonnage of the composite collector is 10-150g; after the ore slurry and the composite collector are continuously mixed, copper-molybdenum concentrate is obtained through froth flotation.

[0018] In an embodiment, the composite collector includes alkoxycarbonyl alkyl dithiocarbamic acid ester 20-25%, butyl xanthate 10-20%, allyl sulfonamide 5-15%, kerosene 15-25%, pine oil 5-10% and an activator 1-5% by mass fraction.

[0019] In an embodiment, the preparation process of the composite collector is as follows: the butyl xanthate, kerosene and pine oil are mixed, the activator is added and stirred for 30 minutes; the alkoxycarbonyl alkyl dithiocarbamic acid ester and the allyl sulfonamide are added and dispersed for 40 minutes under 800W ultrasonic wave to form a homogeneous solution.

[0020] The application has the following beneficial effects:

[0021] The conventional flotation machine needs to use a premixing device to premix the ore pulp and the collecting agent before flotation, but the conventional premixing device mainly uses a tank type device, a stirring device is arranged in the tank, and the ore pulp and the collecting agent are uniformly mixed through long-time overall stirring. However, this method needs to preliminarily adjust the proportion of the ore pulp and the collecting agent and cannot be adjusted in the middle. Meanwhile, since the collecting agent has selective adsorption capacity for minerals, when the collecting agent is added, the collecting agent at the adding point will form a local high-concentration area, even if the collecting agent is dispersed through the stirring device, the collecting agent in the high-concentration area will still be attached to the surfaces of target minerals in the area in large quantities, which not only causes the target minerals in a low-concentration area to have less collecting agent attached thereto, affecting the recovery rate of the target minerals, but also causes the collecting agent overflowing from the high-concentration area to be attached to the surfaces of non-target minerals, so that the non-target minerals are floated together in the subsequent flotation process, finally resulting in poor flotation effect. Therefore, a large amount of collecting agent needs to be used when the conventional flotation machine is used to achieve the expected effect. However, too much amount of the collecting agent not only has high cost and large difficulty in subsequent wastewater treatment, but also affects the overall fluidity of the ore pulp, causing the ore pulp to form a colloidal structure or aggregate into micro-aggregates, so that the target minerals are coated with other components and floated together, which affects the flotation effect.

[0022] Therefore, the ore pulp is separated into multiple streams when entering the copper-molybdenum sulfide mixed flotation device through the feeding mixing mechanism, then each stream is mixed with the composite collecting agent through the mixing pipe, then the mixed mixed liquid is sprayed out after being further mixed in the confluence mixing mechanism, and the mixed liquid is fully contacted with the micro-nano bubbles generated by the impeller mechanism, so that the flotation effect can be ensured while reducing the amount of the collecting agent.

[0023] Moreover, the multi-way mixing assembly is arranged in the confluence mixing mechanism, so that the multiple mixed liquids form turbulent flow in the confluence cavity, the liquid in the confluence cavity is prevented from forming vortex under the action of the stirring paddle rotating in one direction, the mineral components in the ore pulp are prevented from aggregating, the mineral components are sprayed out in a dispersed state, and the mineral components can be fully contacted with the micro-nano bubbles in the subsequent process.

[0024] Moreover, the copper-molybdenum sulfide mixed flotation device provided by the application stores the composite collecting agent through the collecting agent storage assembly, so that the composite collecting agent can be transported according to the pressure difference between the mixing pipe and the collecting agent storage assembly. Moreover, since the flow rate of the ore pulp changes, the pressure difference changes, so that the amount of the composite collecting agent transported can dynamically change with the change of the flow rate of the ore pulp, and the convenience and accuracy of the adding process of the composite collecting agent are effectively improved.

[0025] Meanwhile, the application further adjusts the proportion of the collector, and uses alkoxycarbonyl alkyl dithiocarbamic acid ester to be compounded with other components, so that the adhesion selectivity of the composite collector to copper and molybdenum minerals is improved, thereby reducing the required amount of the composite collector while ensuring the flotation effect.

[0026] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure and / or components particularly pointed out in the description and claims of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of the internal structure in an embodiment of the present application;

[0028] Figure 2 is a front view; Figure 1

[0029] Figure 3 is a top view; Figure 1

[0030] Figure 4 is a sectional view at A-A in the middle; Figure 3

[0031] Figure 5 is an enlarged view of a part B; Figure 4

[0032] Figure 6 is an enlarged view of a part C; Figure 4

[0033] Figure 7 is a schematic view of the internal structure in an embodiment of the present application;

[0034] Figure 8 is a side view; Figure 7

[0035] Figure 9 is an exploded view of the feeding and mixing mechanism and the converging and mixing mechanism in an embodiment of the present application.

[0036] REFERENCE NUMERALS:

[0037] ​​​​​​1, main body; 2, impeller mechanism; 3, scraper mechanism; 4, feeding and mixing mechanism; 41, mixing shell; 411, pulp inlet; 412, pulp inlet area; 413, mixing area; 42, pulp feeding disc; 421, pulp distribution port; 43, mixing pipe; 431, mixing section; 4311, mixing cavity; 432, flow guide section; 4321, corrugated flow channel; 4322, intersection point; 433, connecting channel; 44, collector reagent storage assembly; 441, feeding pipe; 442, liquid storage tank; 443, corrugated connecting pipe; 444, ultrasonic oscillator; 445, damping spring; 5, flow mixing mechanism; 51, flow mixing plate; 511, flow mixing cavity; 52, multidirectional mixing assembly; 521, driving motor; 522, driving rod; 523, main stirring paddle; 524, side stirring paddle group; 5241, first side rod; 5242, second side rod; 5243, side paddle blade; 525, driving gear set; 5251, fixed frame; 5252, driving bevel gear; 5253, first bevel gear; 5254, second bevel gear; 526, protection shell; 6, flow guiding and impacting mechanism; 61, conical structure; 62, fixed plate; 63, air flow nozzle. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application; and the technical features in the different implementation manners of the present application described below can be combined with each other as long as there is no conflict. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of the present application.

[0039] In the description of the present application, it should be noted that all the terms (including technical terms and scientific terms) used in the present application have the same meanings as those generally understood by those of ordinary skill in the art to which the present application belongs, and should not be understood as a limitation on the present application; it should be further understood that the terms used in the present application should be understood as having the same meanings as the meanings of these terms in the context of the present specification and the related art, and should not be understood in an idealized or overly formal sense, unless explicitly defined in the present application.

[0040] To explain the technical content, the achieved purposes and effects of the present application in detail, the following will be described in conjunction with the embodiments and the accompanying drawings.

[0041] Please refer to Figures 1 to 8The application discloses a copper-molybdenum sulfide mixed flotation device for froth flotation of ore pulp, which comprises a main body 1, an impeller mechanism 2 and a scraper mechanism 3, the impeller mechanism 2 is arranged in the center of the main body 1, the impeller mechanism 2 stirs liquid in the main body 1 and generates micro-nano bubbles, the micro-nano bubbles drive target minerals in the ore pulp to float upwards, and under the action of the scraper mechanism 3, the target minerals flow into an overflow tank arranged around the main body 1, and the device further comprises:

[0042] An ore feeding and mixing mechanism 4 is arranged between the impeller mechanism 2 and the scraper mechanism 3, and comprises a mixing shell 41, an ore feeding disc 42, a mixing pipe 43 and a collector storage assembly 44; the ore feeding disc 42, the mixing pipe 43 and the collector storage assembly 44 are arranged in the mixing shell 41, the ore feeding disc 42 divides the mixing shell 41 into an ore feeding area 412 and a mixing area 413; the mixing shell 41 is provided with an ore feeding opening 411, the ore feeding disc 42 is provided with a plurality of ore feeding openings 421, the mixing pipe 43 is in communication with the ore feeding area 412 through the ore feeding openings 421, a feeding pipe 441 of the collector storage assembly 44 penetrates through the ore feeding disc 42 and extends out of the mixing shell 41, the mixing pipe 43 is arranged around the collector storage assembly 44, a side wall of the mixing pipe 43 is provided with a connecting channel 433, the collector storage assembly 44 is in communication with the mixing pipe 43 through the connecting channel 433, and the collector storage assembly 44 sends composite collectors into the mixing pipe 43 through the connecting channel 433 through a pressure difference;

[0043] A converging and mixing mechanism 5 is arranged in the mixing shell 41 and comprises a converging plate 51 and a multi-directional mixing assembly 52, the converging plate 51 is arranged at the end of the mixing pipe 43 and is in communication with the mixing pipe 43, the converging plate 51 divides the mixing area 413 into a converging cavity 511, the converging cavity 511 is used for collecting and mixing the mixed liquid of the ore pulp and the composite collectors flowing out of the mixing pipe 43 and then spraying the mixed liquid; the multi-directional mixing assembly 52 is arranged at the top of the converging cavity 511 and vertically extends downwards, and the multi-directional mixing assembly 52 rotates and stirs the mixed liquid in the converging cavity 511 in horizontal and vertical directions.

[0044] Specifically, the ore feeding and mixing mechanism 4 and the converging and mixing mechanism 5 can be vertically arranged or transversely arranged, or the mixed liquid flowing out of the converging and mixing mechanism 5 can be conveyed into the impeller mechanism 2 through a pipeline, and the specific type of the impeller mechanism 2 can be adjusted according to needs, and no specific limitation is made.

[0045] The collector storage assembly 44 needs to transport the composite collector into the mixing pipe 43 by pressure difference. If the pressure difference is increased by increasing the internal pressure of the collector storage assembly 44, the operator needs to adjust in real time according to the flow of the ore pulp in the mixing pipe 43. Since the same slurry inlet disc 42 is connected with multiple mixing pipes 43, the flow of the ore pulp in different mixing pipes 43 will deviate, and the internal pressure of the collector storage assembly 44 is the same as a whole, so that the simple control of the internal pressure of the collector storage assembly 44 cannot meet the needs of all mixing pipes 43. Therefore, the mixing pipe 43 comprises a mixing section 431 and a flow guide section 432, the mixing section 431 has a mixing cavity 4311 which is first contracted and then expanded, and the connecting channel 433 is located at the smallest diameter position of the mixing cavity 4311; the flow guide section 432 is internally provided with a corrugated flow channel 4321, and the ore pulp and the composite collector flow along the corrugated flow channel 4321 after being mixed in the mixing section 431. That is, the mixing section 431 of the mixing pipe 43 adopts a Venturi structure, and the flow and flow rate of the ore pulp are different, which will cause the negative pressure generated at the throat of the Venturi structure to be different, so that the pressure at the throat dynamically changes according to the flow and flow rate of the ore pulp. The collector storage assembly 44 is connected with the throat of the Venturi structure, so that the ore pulp in different mixing pipes 43 can obtain the composite collector corresponding to the flow thereof, and the accuracy of the addition of the composite collector is improved. Moreover, the composite collector enters the mixing pipe 43 from the throat, the composite collector is dispersed by the ore pulp accelerated by the Venturi structure after entering, preliminary mixing is performed, then the mixed liquid flows out of the Venturi structure and enters the corrugated flow channel 4321 of the flow guide section 432, the mixed liquid first impacts on the end wall of the flow guide section 432, and then the composite collector and the ore pulp are further mixed under the action of the corrugated flow channel 4321, so as to finally ensure the mixing effect of the ore pulp and the composite collector.

[0046] Specifically, the corrugated flow channel 4321 can adopt a spiral or wave path, so that the mixed liquid repeatedly changes direction when flowing along the corrugated flow channel 4321, and the mixing of the ore pulp and the composite collector is further promoted.

[0047] In order to ensure that the mixed liquid does not form a laminar flow after entering the flow guide section 432, and to avoid the stratification of the ore pulp, in the embodiment, the corrugated flow channel 4321 is provided with at least two groups, the corrugated flow channel 4321 repeatedly separates and intersects along the length direction of the flow guide section 432, and the intersection points 4322 of the corrugated flow channel 4321 are located on the central axis of the flow guide section 432.

[0048] Further, the intersection points 4322 of the corrugated flow channel 4321 are provided with at least three groups, and the distance between adjacent intersection points 4322 gradually increases from top to bottom. In this way, at least three cycles of separation-intersection are formed. The distance between the intersection points 4322 gradually increases, the mixed liquid in the flow channel is accelerated, the impact force at the intersection point 4322 is sufficient, and the mixing effect is ensured.

[0049] Further, each guide section 432 is provided with 4 groups of corrugated flow channels 4321, and the included angle between the planes where the adjacent corrugated flow channels 4321 are located is 90°. Such arrangement can make full use of the space of the guide section 432, improve the overall flow under the condition of ensuring the mixing effect, and further improve the flotation efficiency.

[0050] The conventional stirring paddle only rotates in the horizontal plane or the vertical plane. In the embodiment, the multidirectional mixing assembly 52 includes a driving motor 521, a driving rod 522, a main stirring paddle 523, and a side stirring paddle group 524. The driving rod 522 is arranged at the output end of the driving motor 521. The main stirring paddle 523 is arranged at the end of the driving rod 522 away from the driving motor 521. The side stirring paddle group 524 is arranged at the middle part of the driving rod 522. The side stirring paddle group 524 includes a first side rod 5241, a second side rod 5242, and a side paddle blade 5243. The first side rod 5241 and the second side rod 5242 are on the same straight line. The first side rod 5241 and the second side rod 5242 extend horizontally from the driving rod 522 to both sides. The side paddle blade 5243 is arranged at the end of the first side rod 5241 or the second side rod 5242. A driving gear set 525 is sleeved on the driving rod 522. The driving gear set 525 drives the first side rod 5241 and the second side rod 5242 to rotate in opposite directions. Such arrangement enables the multidirectional mixing assembly 52 to provide at least three directions of stirring for the mixed liquid in the confluence cavity 511, so that the mixed liquid flowing out of the different mixing pipes 43 can be fully mixed.

[0051] In the embodiment, the driving gear set 525 includes a fixed frame 5251, a driving bevel gear 5252, a first bevel gear 5253, and a second bevel gear 5254. The fixed frame 5251 is connected with the top of the confluence cavity 511. The driving bevel gear 5252, the first bevel gear 5253, and the second bevel gear 5254 are rotatably connected with the fixed frame 5251. The driving bevel gear 5252 is sleeved on the driving rod 522. The first bevel gear 5253 and the second bevel gear 5254 are arranged on both sides of the driving rod 522 and mesh with the driving bevel gear 5252. The first bevel gear 5253 is drivingly connected with the first side rod 5241. The second bevel gear 5254 is drivingly connected with the second side rod 5242. Such arrangement enables the first bevel gear 5253 and the second bevel gear 5254 to be driven by one driving rod 522 and to rotate in opposite directions, which is stable in structure and

[0052] Further, the side stirring paddle group 524 is provided with two groups. The straight lines where the two groups of side stirring paddle groups 524 are located are perpendicular to each other.

[0053] Preferably, the multi-directional mixing assembly 52 further comprises a protective shell 526, the driving rod 522 and the driving gear set 525 are contained in the protective shell 526. The protective shell 526 avoids the minerals in the ore pulp affecting the transmission of the driving gear set 525, and improves the service life of the device.

[0054] The composite collector may be stratified during long-term storage after being introduced into the collector storage assembly 44. Therefore, in the embodiment, the collector storage assembly 44 comprises a liquid storage tank body 442, a connecting bellows 443 and an ultrasonic oscillator 444. The liquid storage tank body 442 has a liquid storage cavity therein. The ultrasonic oscillator 444 is arranged at the bottom of the liquid storage cavity and extends vertically upward. The two ends of the connecting bellows 443 are sealingly connected with the liquid storage cavity and the connecting channel 433.

[0055] Further, the two ends of the connecting bellows 443 are provided with extension portions. A damping spring 445 is sleeved on the connecting bellows 443, and the two ends of the damping spring 445 abut against the extension portions. In this way, the connecting bellows 443 has a buffering and damping capacity, and when the ultrasonic oscillator 444 is working, the vibration of the ultrasonic oscillator 444 can be prevented from being transmitted to the mixing pipe 43 through the connecting bellows 443, so as to ensure the sealing performance and structural stability of the device as a whole.

[0056] Further, a differential pressure valve can be arranged on the connecting bellows 443. The differential pressure valve adjusts the opening degree by detecting the pressure difference change between the mixing pipe 43 and the liquid storage cavity, so that the delivery control of the composite collector is more accurate, and the adjustability of the device as a whole is effectively improved.

[0057] In the embodiment, a flow guiding and impacting mechanism 6 is further included. The flow guiding and impacting mechanism 6 is arranged at the bottom of the main body 1 and below the converging and mixing mechanism 5. Specifically, the flow guiding and impacting mechanism 6 adopts a conical structure 61 to cut and guide the liquid flow sprayed by the converging and mixing mechanism 5, so that the mixed liquid is fully mixed with the micro-nano bubbles generated by the impeller mechanism 2.

[0058] Further, a fixed plate 62 is arranged at the bottom of the conical structure 61 of the flow guiding and impacting mechanism 6. An airflow nozzle 63 is arranged around the conical structure 61 on the fixed plate 62, and the airflow nozzle 63 is in communication with a compressed gas pipeline outside. In use, the airflow nozzle 63 sprays micro-nano bubbles toward the conical structure 61, and the micro-nano bubbles collide with the liquid flow sprayed by the converging and mixing mechanism 5 to form turbulent flow. The dispersed liquid flow is further dispersed under the action of the impeller mechanism 2, so as to be fully contacted with the micro-nano bubbles generated by the impeller mechanism 2 and the airflow nozzle 63. Moreover, the micro-nano bubbles of the airflow nozzle 63 flow along the surface of the conical structure 61, which can avoid the adhesion of the ore pulp minerals to the surface of the conical structure 61 or the deposition on the edge, further increasing the contact probability of the target minerals in the ore pulp and the bubbles, and thus enhancing the flotation effect.

[0059] The application also provides a sulfide copper-molybdenum ore mixed flotation method, which adopts any sulfide copper-molybdenum ore mixed flotation device as above, and the flotation steps are as follows:

[0060] S1, a composite collector is prepared, and the composite collector is fed into the collector storage assembly 44; raw materials of the composite collector include alkoxycarbonyl alkyl dithiocarbamate, butyl xanthate, allyl thiocarbamate, kerosene, pine oil and an activator;

[0061] S2, ore grinding, the mineral is ground to a particle size of less than 200 mesh accounting for 60% to 80%; water is added to adjust the pulp concentration to 20% to 40%, and the pH value is 10 to 11;

[0062] S3, the pulp is fed into the sulfide copper-molybdenum ore mixed flotation device, the tonnage of the composite collector is 10g to 150g, and after the pulp and the composite collector are continuously mixed, copper-molybdenum concentrate is obtained through froth flotation.

[0063] In this embodiment, the composite collector includes alkoxycarbonyl alkyl dithiocarbamate 20% to 25%, butyl xanthate 10% to 20%, allyl thiocarbamate 5% to 15%, kerosene 15% to 25%, pine oil 5% to 10% and an activator 1% to 5% by mass fraction.

[0064] In this embodiment, the preparation process of the composite collector is as follows: butyl xanthate, kerosene and pine oil are mixed, the activator is added and stirred for 30 minutes; alkoxycarbonyl alkyl dithiocarbamate and allyl thiocarbamate are added and dispersed for 40 minutes under 800W ultrasonic waves to form a homogeneous solution.

[0065] Further, after the ultrasonic treatment of the composite collector is completed, the composite collector is transported into the collector storage assembly 44, and continuous ultrasonic treatment is performed in the collector storage assembly 44 to avoid the stratification of components of the composite collector due to long-term storage.

[0066] In this embodiment, the synthesis process of the alkoxycarbonyl alkyl dithiocarbamate is as follows: fatty amine and carbon disulfide are reacted to generate dithiocarbamate under alkaline conditions, then chloromethyl alkyl ester is added to perform condensation reaction, and after purification, the alkoxycarbonyl alkyl dithiocarbamate is obtained.

[0067] In the preliminary test of the application, according to the different component allocation ratios of the added collector, the sulfide copper-molybdenum ore mixed flotation device provided by the application can reduce the collector dosage by 5% to 10% compared with the ordinary flotation machine. Under the same collector dosage, the sulfide copper-molybdenum ore mixed flotation device provided by the application can increase the recovery rate of copper and molybdenum by about 0.5% to 1% compared with the ordinary flotation machine.

[0068] The commercial reagent used in the following examples is a commercial flotation collector, and all control flotation tests are carried out by using the mixed flotation device for copper-molybdenum sulfide ore provided by the present application.

[0069] Example 1: Flotation test of a copper-molybdenum ore in Tibet Autonomous Region

[0070] Ore properties: copper content 0.36%, molybdenum content 0.018%, sulfur content 2.46%, and copper oxidation rate 8.06%.

[0071] Grinding: the ore fineness of-200 mesh is 70%, the dosage of the reagent provided by the present application is 50 g / t of ore, and the dosage of the commercial reagent is 65 g / t of ore.

[0072] Experimental results

[0073] 1. Experimental grade reagent: closed-circuit test process of "one roughing, one cleaning, and one scavenging".

[0074] Table 1: Preliminary flotation results

[0075]

[0076] Under laboratory conditions, the composite collector provided by the present application is used as the flotation reagent, and under the condition of low dosage, the flotation results of copper-molybdenum concentrate yield 1.40%, copper grade 23.98%, molybdenum grade 1.22%, copper recovery 92.22%, and molybdenum recovery 94.01% are obtained; the commercial reagent is used as the flotation reagent, and the flotation results of copper-molybdenum concentrate yield 1.27%, copper grade 22.69%, molybdenum grade 1.26%, copper recovery 92.82%, and molybdenum recovery 92.24% are obtained.

[0077] 2. Industrial grade reagent: industrial grade raw materials are used to prepare the reagent of the present application (2000 kg).

[0078] Table 2: Three times of flotation concentrate results in production site

[0079]

[0080] Further, the industrial grade contrast test of the commercial collector and the composite collector provided by the application is carried out in the production site. When the composite collector provided by the application is used as the flotation reagent, the rough concentrate with the same floatability can be obtained, and the rough concentrate is regrinded to 80% of 400 meshes, and the copper concentrate with the copper grade of 29.06%, the molybdenum grade of 1.94%, the copper recovery rate of 91.22%, the molybdenum recovery rate of 90.76% and the copper grade of 0.033% of the reinforced tailings is obtained through three times of cleaning. When the commercial reagent is used as the collector, the copper concentrate with the copper grade of 28.72%, the molybdenum grade of 1.96%, the copper recovery rate of 90.94% and the molybdenum recovery rate of 89.90% and the copper grade of 0.035% of the reinforced tailings is obtained through three times of cleaning. It is shown that the collecting performance of the reagent of the application is basically equivalent to that of the commercial reagent when the use amount of the reagent of the application is less than that of the commercial reagent, and the copper grade of the reinforced tailings of the reagent of the application is slightly lower than that of the commercial reagent.

[0081] Example two: flotation test of a copper-molybdenum ore in Xinjiang Uygur Autonomous Region

[0082] Ore property: copper content of 0.28%, molybdenum content of 0.015% and sulfur content of 3.12%.

[0083] Grinding: the ore fineness of 200 meshes accounts for 75%, the use amount of the reagent of the application is 50g / t of ore, and the use amount of the commercial reagent is 65g / t of ore.

[0084] Table 3: once cleaning result in the production site

[0085]

[0086] For the once cleaning, the copper concentrate with the copper grade of 23.62%, the molybdenum grade of 0.56%, the copper recovery rate of 93.38% and the molybdenum recovery rate of 89.63% is obtained by using the reagent of the application. The copper collecting capacity of the reagent of the application is basically equivalent to that of the commercial reagent when the use amount of the reagent of the application is less than that of the commercial reagent, and the molybdenum collecting capacity of the reagent of the application is 2.23% higher than that of the commercial reagent.

[0087] In addition, those skilled in the art should understand that although there are many problems in the prior art, each embodiment or technical solution of the application can only improve in one or several aspects, and it is not necessary to solve all the technical problems listed in the prior art or background art at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be regarded as a limitation to the claim.

[0088] Although the terms such as body, impeller mechanism, etc. are used more in this paper, the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the application; it is contrary to the spirit of the application to interpret them as any kind of additional limitation; the terms "first", "second", etc. (if any) in the specification and claims of the embodiments of the application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or part or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A copper-molybdenum sulfide ore mixed flotation device for froth flotation of ore pulp, comprising a main body (1), an impeller mechanism (2) and a scraper mechanism (3), the impeller mechanism (2) is arranged in the center of the main body (1), the impeller mechanism (2) stirs the liquid inside the main body (1) and generates micro-nano bubbles, the micro-nano bubbles drive the target minerals in the ore pulp to float up, and flow into the overflow tank arranged around the main body (1) under the action of the scraper mechanism (3), characterized in that, Also include: The feed mixing mechanism (4) is provided at least one set and is arranged between the impeller mechanism (2) and the scraper mechanism (3), including a mixing shell (41), a pulp feeding disc (42), a mixing pipe (43) and a collector storage assembly (44); The pulp feeding disc (42), the mixing pipe (43) and the collector storage assembly (44) are arranged in the mixing shell (41), the pulp feeding disc (42) separates the mixing shell (41) into a pulp feeding area (412) and a mixing area (413); The mixing shell (41) is provided with a pulp inlet (411), the pulp feeding disc (42) is provided with a plurality of pulp distribution ports (421), the mixing pipe (43) is communicated with the pulp feeding area (412) through the pulp distribution port (421), the feeding pipe (441) of the collector storage assembly (44) penetrates the pulp feeding disc (42) and extends to the outside of the mixing shell (41), the mixing pipe (43) is arranged around the collector storage assembly (44), the side wall of the mixing pipe (43) is provided with a connecting channel (433), the collector storage assembly (44) is communicated with the mixing pipe (43) through the connecting channel (433), the collector storage assembly (44) transports the composite collector into the mixing pipe (43) through the connecting channel (433) by pressure difference; The confluence mixing mechanism (5) is arranged in the mixing shell (41) and includes a confluence plate (51) and a multidirectional mixing assembly (52), the confluence plate (51) is arranged at the end of the mixing pipe (43) and communicated with the mixing pipe (43), the confluence plate (51) separates the mixing area (413) into a confluence cavity (511), the confluence cavity (511) is used for collecting and mixing the mixed liquid of the ore pulp and the composite collector flowed out of the mixing pipe (43) and then spraying out; The multidirectional mixing assembly (52) is arranged at the top of the confluence cavity (511) and extends vertically downward, the multidirectional mixing assembly (52) rotates and stirs the mixed liquid in the confluence cavity (511) in horizontal and vertical directions; The multi-direction mixing assembly (52) comprises a driving motor (521), a driving rod (522), a main stirring paddle (523) and a side stirring paddle group (524), the driving rod (522) is arranged at the output end of the driving motor (521), the main stirring paddle (523) is arranged at the end of the driving rod (522) away from the driving motor (521), and the side stirring paddle group (524) is arranged at the middle of the driving rod (522); the side stirring paddle group (524) comprises a first side rod (5241), a second side rod (5242) and a side paddle blade (5243), the first side rod (5241) and the second side rod (5242) are on the same straight line; the first side rod (5241) and the second side rod (5242) extend horizontally from the driving rod (522) to both sides, and the side paddle blade (5243) is arranged at the end of the first side rod (5241) or the second side rod (5242); a driving gear set (525) is sleeved on the driving rod (522), and the driving gear set (525) drives the first side rod (5241) and the second side rod (5242) to rotate in opposite directions.

2. The copper-molybdenum sulfide ore bulk flotation device of claim 1, wherein: The mixing pipe (43) comprises a mixing section (431) and a flow guide section (432), the mixing section (431) has a mixing cavity (4311) which is first contracted and then expanded, and the connecting channel (433) is located at the position with the smallest diameter of the mixing cavity (4311); the flow guide section (432) is internally provided with corrugated flow channels (4321), and the ore pulp and the composite collector flow along the corrugated flow channels (4321) after mixing in the mixing section (431).

3. The copper-molybdenum sulfide ore bulk flotation device of claim 2, wherein: The corrugated flow channels (4321) are at least provided with two groups, the corrugated flow channels (4321) repeatedly separate and meet along the length direction of the flow guide section (432), and the meeting points (4322) of the corrugated flow channels (4321) are located on the central axis of the flow guide section (432).

4. The copper-molybdenum sulfide ore bulk flotation device of claim 1, wherein: The driving gear set (525) comprises a fixing frame (5251), a driving bevel gear (5252), a first bevel gear (5253) and a second bevel gear (5254); the fixing frame (5251) is connected with the top of the converging cavity (511), the driving bevel gear (5252), the first bevel gear (5253) and the second bevel gear (5254) are rotatably connected with the fixing frame (5251); the driving bevel gear (5252) is sleeved on the driving rod (522), the first bevel gear (5253) and the second bevel gear (5254) are arranged on the two sides of the driving rod (522) respectively and mesh with the driving bevel gear (5252), the first bevel gear (5253) is drivingly connected with the first side rod (5241), and the second bevel gear (5254) is drivingly connected with the second side rod (5242).

5. The copper-molybdenum sulfide ore bulk flotation device of claim 1, wherein: The collector storage assembly (44) comprises a storage tank body (442) having a storage cavity therein, a connecting bellows (443) and an ultrasonic oscillator (444), the ultrasonic oscillator (444) being arranged at the bottom of the storage cavity and extending vertically upward, and the two ends of the connecting bellows (443) being in sealed connection with the storage cavity and the connecting channel (433).

6. The copper-molybdenum sulfide ore bulk flotation device of claim 1, wherein: The device further comprises a flow guiding and impacting mechanism (6) arranged at the bottom of the main body (1) and below the flow converging and mixing mechanism (5).

7. A method for bulk flotation of copper-molybdenum sulfide ores, characterized in that, The copper-molybdenum sulfide mixed flotation device according to any one of claims 1-6 is adopted, and the flotation steps are as follows: S1, preparing a composite collector and feeding the composite collector into a collector storage assembly (44); the raw materials of the composite collector include alkoxycarbonyl alkyl dithiocarbamic acid ester, butyl xanthate, allyl sulfide, kerosene, pine oil and an activator; S2, grinding the ore to a particle size of 60%-80% less than 200 mesh, adding water to adjust the concentration of the ore slurry to 20%-40% and the pH value to 10-11; S3, feeding the ore slurry into the copper-molybdenum sulfide mixed flotation device, the dosage of the composite collector per ton of ore being 10-150 g, and after the ore slurry and the composite collector are continuously mixed, copper-molybdenum concentrate is obtained through froth flotation.

8. The copper-molybdenum sulfide ore bulk flotation process according to claim 7, characterized in that: The composite collector includes, in mass fraction, 20%-25% of alkoxycarbonyl alkyl dithiocarbamic acid ester, 10%-20% of butyl xanthate, 5%-15% of allyl sulfide, 15%-25% of kerosene, 5%-10% of pine oil and 1%-5% of the activator.

9. The copper-molybdenum sulfide ore bulk flotation process according to claim 7, characterized in that: The preparation process of the composite collector is as follows: butyl xanthate, kerosene and pine oil are mixed, the activator is added and stirred for 30 minutes; alkoxycarbonyl alkyl dithiocarbamic acid ester and allyl sulfide are added and dispersed for 40 minutes under ultrasonic waves of 800 W to form a homogeneous solution.

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