Copper sulfide molybdenum ore bulk flotation device and method

Abstract

The invention relates to the technical field of mineral flotation, in particular to a copper sulfide molybdenum ore bulk flotation device and method. The copper sulfide molybdenum ore bulk flotation device is used for conducting froth flotation on ore pulp and comprises a main body, an impeller mechanism and a scraper mechanism, the impeller mechanism is arranged in the center of the main body and stirs liquid in the main body and generates micro-nano bubbles, and the copper sulfide molybdenum ore bulk flotation device further comprises a feeding and mixing mechanism, at least one set of mixing device is arranged between the impeller mechanism and the scraper mechanism and comprises a mixing shell, a slurry inlet disc, a mixing pipe and a collecting agent storage assembly. And the confluence mixing mechanism is arranged in the mixing shell and comprises a confluence plate and a multidirectional mixing assembly. According to the copper sulfide molybdenum ore bulk flotation device, the flotation effect can be guaranteed under the condition that the using amount of a collecting agent is reduced. Moreover, the proportion of the collecting agent is further adjusted, the adhesion selectivity of copper and molybdenum minerals is improved, and therefore the use amount of the needed composite collecting agent is reduced under the condition that the flotation effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral flotation, and in particular to a mixed flotation device and method for copper sulfide-molybdenum ore. Background Art

[0002] Flotation is a mineral separation method that utilizes the differences in physical and chemical properties of mineral surfaces to separate minerals. Before flotation, the ore must be ground to a particle size suitable for flotation, essentially dissociating the useful minerals into individual units for separation. Flotation reagents are then added. During flotation, air is introduced into the slurry, creating a large number of bubbles. These particles, often hydrophobic minerals, are attracted to the bubbles and float to the surface of the slurry, forming a mineralized froth layer. Particles of hydrophilic minerals, often hydrophilic minerals, are unable to adhere to the bubbles and remain in the slurry. The mineralized froth is then removed, achieving separation.

[0003] In the current flotation process for copper-molybdenum sulfide ores, traditional collectors such as xanthate, black powder, and kerosene are primarily used. However, with the current decline in ore grade and the increase in associated minerals, traditional collectors have problems with poor selectivity and high dosage. Furthermore, premixing equipment is typically used for prolonged stirring and mixing when adding collectors. This not only consumes a lot of energy and requires prolonged stirring, but also causes the minerals at the collector addition point to absorb more collector than at other locations, resulting in uneven collector distribution and affecting subsequent flotation results. Furthermore, premixing equipment suffers from poor production continuity when faced with large-scale production and is unable to adapt to the slurry flow rate, resulting in the existing flotation process being unable to meet the requirements 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 sulfide-molybdenum ore, so as to solve the problems of poor selectivity, high reagent dosage and insufficient adaptability of the existing copper sulfide-molybdenum ore flotation process.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mixed flotation device for copper sulfide molybdenum ore, which is used for froth flotation of ore pulp, including a main body, an impeller mechanism and a scraper mechanism. The impeller mechanism is arranged 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 drive the target minerals in the ore pulp to float up and flow into the overflow trough arranged around the main body under the action of the scraper mechanism. The device also includes: The feeding and mixing mechanism is provided with at least one group and is arranged between the impeller mechanism and the scraper mechanism, including a mixing shell, a slurry feeding disk, a mixing tube and a collector storage assembly; the slurry feeding disk, the mixing tube and the collector storage assembly are arranged in the mixing shell, and the slurry feeding disk divides the mixing shell into a slurry feeding area and a mixing area; the mixing shell is provided with a slurry feeding port, the slurry feeding disk is provided with a plurality of slurry dispensing ports, the mixing tube is connected with the slurry feeding area through the slurry dispensing port, the feeding tube of the collector storage assembly passes through the slurry feeding disk and extends to the outside of the mixing shell, the mixing tube is arranged around the collector storage assembly, the side wall of the mixing tube is provided with a connecting channel, the collector storage assembly is connected with the mixing tube through the connecting channel, and the collector storage assembly transports the composite collector into the mixing tube through the connecting channel through the pressure difference; The converging and mixing mechanism is arranged in the mixing shell and includes a converging plate and a multi-directional mixing assembly. The converging plate is arranged at the end of the mixing tube and is connected to the mixing tube. The converging plate separates the mixing area into a converging cavity. The converging cavity is used to collect and mix the mixed liquid of the ore pulp and the composite collector flowing out of the mixing tube and then spray it out; the multi-directional mixing assembly is arranged at the top of the converging cavity and extends vertically downward. The multi-directional mixing assembly rotates and stirs the mixed liquid in the converging cavity in the horizontal and vertical directions.

[0006] In one embodiment, the mixing tube includes a mixing section and a guide section. The mixing section has a mixing cavity that first contracts and then expands, and the connecting channel is located at the point where the diameter of the mixing cavity is the smallest. A corrugated flow channel is provided inside the guide section, and the slurry and the composite collector are mixed in the mixing section and then flow along the corrugated flow channel.

[0007] In one embodiment, at least two groups of corrugated flow channels are provided, and the corrugated flow channels are repeatedly separated and merged along the length direction of the guide section, and the intersection point of the corrugated flow channels is located on the central axis of the guide section.

[0008] In one embodiment, the multi-directional mixing assembly includes a drive motor, a drive rod, a main stirring paddle and a side stirring paddle group, the drive rod is arranged at the output end of the drive motor, the main stirring paddle is arranged at the end of the drive rod away from the drive motor, and the side stirring paddle group is arranged in the middle of the drive rod; the side stirring paddle group includes a first side rod, a second side rod and a side paddle, and the first side rod and the second side rod are on the same straight line; the first side rod and the second side rod extend horizontally to both sides starting from the drive rod, and the side paddles are arranged at the end of the first side rod or the second side rod; a drive gear group is provided on the drive rod, and the drive gear group drives the first side rod and the second side rod to rotate in opposite directions.

[0009] In one embodiment, the driving gear group includes a fixed frame, a driving bevel gear, a first bevel gear and a second bevel gear; the fixed frame is connected to the top of the confluence cavity, and the driving bevel gear, the first bevel gear and the second bevel gear are rotatably connected to 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 both sides of the driving rod and meshed with the driving bevel gear, the first bevel gear is drivingly connected to the first side rod, and the second bevel gear is drivingly connected to the second side rod.

[0010] In one embodiment, the collector storage assembly includes a liquid storage tank body, a connecting bellows and an ultrasonic oscillator. The liquid storage tank body has a liquid storage cavity. The ultrasonic oscillator is arranged at the bottom of the liquid storage cavity and extends vertically upward. The two ends of the connecting bellows are sealedly connected to the liquid storage cavity and the connecting channel.

[0011] In one embodiment, a flow guiding and impacting mechanism is further included, and the flow guiding and impacting mechanism is arranged at the bottom of the main body and below the converging and mixing mechanism.

[0012] The present invention also provides a mixed flotation method for copper sulfide-molybdenum ore, which uses any of the above-mentioned mixed flotation devices for copper sulfide-molybdenum ore, and the flotation steps are as follows: S1. Prepare a composite collector, and introduce the composite collector into a collector storage assembly; the raw materials of the composite collector include alkoxycarbonyl alkyl dithiocarbamate, butyl xanthate, allyl thiocarbamate, kerosene, pine oil, and an activator; S2, grinding, grinding the minerals to a particle size of less than 200 mesh, accounting for 60% to 80%; adding water to adjust the pulp concentration to 20% to 40% and the pH value to 10-11; S3. The slurry is passed into the mixed flotation device of copper-molybdenum sulfide ore. The dosage of the composite collector per ton of ore is 10g to 150g. After the slurry and the composite collector are continuously mixed, the copper-molybdenum concentrate is obtained by froth flotation.

[0013] In one embodiment, the composite collector includes, by mass fraction, 20% to 25% of alkoxycarbonyl alkyldithiocarbamate, 10% to 20% of butyl xanthate, 5% to 15% of allylthiocarbamate, 15% to 25% of kerosene, 5% to 10% of pine oil, and 1% to 5% of an activator.

[0014] In one embodiment, the preparation process of the composite collector is as follows: butyl xanthate, kerosene, and pine oil are mixed, an activator is added, and the mixture is stirred for 30 minutes; alkoxycarbonyl alkyl dithiocarbamate and allyl thiocarbamate are added, and the mixture is dispersed under 800W ultrasound for 40 minutes to form a homogeneous solution.

[0015] The beneficial effects of the present invention are: Traditional flotation machines require a premixing device to pre-mix the slurry and collector before flotation. However, these premixing devices typically utilize tank-type equipment with a stirring device installed within the tank. This system achieves a uniform mixing of the slurry and collector through prolonged, integrated agitation. However, this method requires pre-mixing the slurry and collector ratio, making adjustments impossible during flotation. Furthermore, due to the collector's selective adsorption to minerals, when the collector is added, a localized high concentration zone forms at the point of addition. Even with agitation, the collector in this high concentration zone still adheres significantly to the target mineral surface. This not only reduces the amount of collector adhering to the target mineral in areas with lower concentrations, impacting target mineral recovery, but also potentially allows for excess collector to adhere to the surfaces of non-target minerals, causing them to float together during subsequent flotation, ultimately resulting in poor flotation performance. Therefore, flotation machines require a high collector dosage to achieve the desired results. However, excessive use of collecting agents is not only costly and difficult to treat in subsequent wastewater, but also affects the overall fluidity of the slurry, causing the slurry to form colloidal structures or aggregate into microclusters, causing the target mineral to cover other components and float together, which will affect the flotation effect.

[0016] Therefore, the present invention separates the ore pulp into multiple streams when entering the copper sulfide molybdenum ore mixed flotation device through the feed mixing mechanism, and then mixes each stream with the composite collector separately through the mixing tube. The mixed liquid is then passed into the converging mixing mechanism, and the multiple streams of mixed liquid are further mixed and then ejected to fully contact the micro-nano bubbles generated by the impeller mechanism, thereby ensuring the flotation effect while reducing the amount of collector used.

[0017] Moreover, a multi-directional mixing component is provided in the confluence mixing mechanism, so that multiple streams of mixed liquid form turbulence in the confluence cavity, avoiding the formation of vortexes in the liquid in the confluence cavity under the action of the unidirectional rotating stirring paddle, thereby avoiding the agglomeration of mineral components in the slurry, and making the mineral components remain in a dispersed state when ejected, ensuring that the mineral components can subsequently fully contact with the micro-nano bubbles.

[0018] Furthermore, the copper-molybdenum sulfide ore mixed flotation device provided by the present invention stores a composite collector in a collector storage assembly, enabling the composite collector to be delivered based on the pressure differential between the mixing tube and the collector storage assembly. Furthermore, due to the varying pressure differentials caused by varying slurry flow rates, the delivery rate of the composite collector can be dynamically adjusted with changes in the slurry flow rate, effectively improving the convenience and accuracy of the composite collector addition process.

[0019] At the same time, the present invention further adjusts the ratio of the collector and adopts alkoxycarbonyl alkyl dithiocarbamate to compound with other components to improve the adhesion selectivity of the composite collector to copper and molybdenum minerals, thereby reducing the required amount of the composite collector while ensuring the flotation effect.

[0020] Other features and beneficial effects of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other beneficial effects of the present invention can be achieved and obtained by the structures and / or components specified in the description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 for Figure 1 Main view; Figure 3 for Figure 1 Top view; Figure 4 for Figure 3 Cross-section at AA; Figure 5 for Figure 4 A partial enlarged view of point B in the middle; Figure 6 for Figure 4 A partial enlarged view of point C in the middle; Figure 7 This is a three-dimensional schematic diagram of the internal structure of an embodiment of the present invention; Figure 8 for Figure 7 Side view; Figure 9 1 is an exploded view of a feed mixing mechanism and a converging mixing mechanism in one embodiment of the present invention.

[0022] Description of labels: 1. Main body; 2. Impeller mechanism; 3. Scraper mechanism; 4. Feed mixing mechanism; 41. Mixing shell; 411. Slurry inlet; 412. Slurry inlet area; 413. Mixing area; 42. Slurry inlet plate; 421. Slurry distribution port; 43. Mixing pipe; 431. Mixing section; 4311. Mixing cavity; 432. Diversion section; 4321. Corrugated flow channel; 4322. Intersection point; 433. Connecting channel; 44. Collector storage assembly; 441. Feed pipe; 442. Liquid storage tank; 443. Connecting bellows; 444. Ultrasonic oscillator; 445. Vibration-damping spring; 5. Converging and mixing mechanism; 51. Converging plate; 511. Converging chamber; 52. Multi-directional 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; 525. Driving gear group; 5251. Fixed frame; 5252. Driving bevel gear; 5253. First bevel gear; 5254. Second bevel gear; 526. Protective shell; 6. Diversion impact mechanism; 61. Conical structure; 62. Fixed plate; 63. Air flow nozzle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and should not be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and the relevant field, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present invention.

[0025] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figures 1 to 8A mixed flotation device for copper sulfide-molybdenum ore is used 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 an overflow tank arranged around the main body 1 under the action of the scraper mechanism 3. The device also includes: The feeding mixing mechanism 4 is provided with at least one group and is arranged between the impeller mechanism 2 and the scraper mechanism 3, including a mixing shell 41, a slurry feeding plate 42, a mixing pipe 43 and a collector storage assembly 44; the slurry feeding plate 42, the mixing pipe 43 and the collector storage assembly 44 are arranged in the mixing shell 41, and the slurry feeding plate 42 divides the mixing shell 41 into a slurry feeding area 412 and a mixing area 413; the mixing shell 41 is provided with a slurry feeding port 411, and the slurry feeding plate 42 is provided with a plurality of slurry dispensing ports 421. The pipe 43 is connected to the slurry feeding area 412 through the slurry distribution port 421. The feed pipe 441 of the collector storage assembly 44 passes through the slurry feeding plate 42 and extends to the outside of the mixing shell 41. The mixing pipe 43 is arranged around the collector storage assembly 44. A connecting channel 433 is opened on the side wall of the mixing pipe 43. The collector storage assembly 44 is connected to 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 through the pressure difference. The converging and mixing mechanism 5 is arranged in the mixing shell 41, and includes a converging plate 51 and a multi-directional mixing assembly 52. ​​The converging plate 51 is arranged at the end of the mixing tube 43 and is connected to the mixing tube 43. The converging plate 51 separates the mixing area 413 into a converging cavity 511. The converging cavity 511 is used to collect and mix the mixed liquid of the ore pulp and the composite collector flowing out of the mixing tube 43 and then spray it out; the multi-directional mixing assembly 52 is arranged at the top of the converging cavity 511 and extends vertically downward. The multi-directional mixing assembly 52 rotates and stirs the mixed liquid in the converging cavity 511 in the horizontal and vertical directions.

[0027] Specifically, the feed mixing mechanism 4 and the converging mixing mechanism 5 can be arranged vertically or horizontally, or the mixed liquid flowing out of the converging mixing mechanism 5 can be transported to the impeller mechanism 2 through a pipeline. Those skilled in the art can make adjustments according to the specific type and needs of the impeller mechanism 2 without making specific limitations.

[0028] The collector storage assembly 44 needs to transport the composite collector into the mixing tube 43 through a pressure difference. If the pressure difference is increased only by increasing the internal pressure of the collector storage assembly 44, the operator will need to make real-time adjustments based on the flow rate of the slurry in the mixing tube 43. Since multiple mixing tubes 43 are connected to the same slurry inlet plate 42, there will be deviations in the slurry flow rate in different mixing tubes 43, while the internal pressure of the collector storage assembly 44 is the same as a whole, resulting in the method of simply controlling the internal pressure of the collector storage assembly 44 being unable to adapt to the needs of all mixing tubes 43. Therefore, the mixing tube 43 includes a mixing section 431 and a guide section 432. The mixing section 431 has a mixing cavity 4311 that first contracts and then expands. The connecting channel 433 is located at the smallest diameter of the mixing cavity 4311. A corrugated flow channel 4321 is provided inside the guide section 432. The slurry and the composite collector are mixed through the mixing section 431 and flow along the corrugated flow channel 4321. Specifically, the mixing section 431 of the mixing tube 43 utilizes a Venturi structure. Different slurry flow rates and velocities result in different negative pressures generated at the venturi structure's bellows, causing the pressure at the bellows to dynamically change according to the slurry flow rates and velocities. Connecting the collector storage assembly 44 to the venturi structure's bellows allows the slurries in different mixing tubes 43 to receive a composite collector corresponding to their flow rates, thereby improving the accuracy of composite collector addition. Furthermore, the composite collector enters the mixing tube 43 from the bellows. Upon entry, the composite collector is impacted and dispersed by the slurry accelerated by the Venturi structure, undergoing preliminary mixing. The mixed liquid then flows out of the Venturi structure and enters the corrugated flow channel 4321 of the guide section 432. The mixed liquid first impacts the end wall of the guide section 432, and then, under the action of the corrugated flow channel 4321, the composite collector and the slurry are further mixed, ultimately ensuring a mixing effect between the slurry and the composite collector.

[0029] Specifically, the corrugated flow channel 4321 may adopt a spiral or wavy path, so that the mixed liquid repeatedly changes direction when flowing along the corrugated flow channel 4321, further promoting the mixing of the slurry and the composite collector.

[0030] In order to ensure that the mixed liquid does not form laminar flow after entering the guide section 432 and avoid stratification of the slurry, in this embodiment, at least two groups of corrugated flow channels 4321 are provided, and the corrugated flow channels 4321 are repeatedly separated and intersected along the length direction of the guide section 432. The intersection point 4322 of the corrugated flow channels 4321 is located on the central axis of the guide section 432.

[0031] Furthermore, the corrugated flow channel 4321 has at least three intersections 4322, with the distance between adjacent intersections 4322 gradually increasing from top to bottom. This arrangement creates at least three cycles of separation and convergence. The gradually increasing distance between intersections 4322 accelerates the mixed liquid within the flow channel, ensuring sufficient impact force at the intersection and ensuring effective mixing.

[0032] Furthermore, each guide section 432 is provided with four groups of corrugated channels 4321, with the angle between the planes of adjacent corrugated channels 4321 being 90°. This arrangement can fully utilize the space of the guide section 432, increase the overall flow rate while ensuring the mixing effect, and thus improve the flotation efficiency.

[0033] Conventional stirring paddles rotate only in the horizontal or vertical plane. In this embodiment, the multi-directional mixing assembly 52 includes a drive motor 521, a drive rod 522, a main stirring paddle 523 and a side stirring paddle group 524. The drive rod 522 is arranged at the output end of the drive motor 521, the main stirring paddle 523 is arranged at the end of the drive rod 522 away from the drive motor 521, and the side stirring paddle group 524 is arranged in the middle of the drive rod 522; the side stirring paddle group 524 includes a first side rod 5241 The first and second side rods 5241, 5242 are aligned in a straight line. The first and second side rods 5241, 5242 extend horizontally from the drive rod 522 to either side. The side paddles 5243 are located at the ends of the first and second side rods 5241, 5242. The drive rod 522 is provided with a drive gear set 525, which drives the first and second side rods 5241, 5242 to rotate in opposite directions. This arrangement allows the multi-directional mixing assembly 52 to provide at least three-directional stirring for the mixed liquid within the confluence chamber 511, ensuring that the mixed liquids flowing out of the different mixing tubes 43 are fully mixed.

[0034] In this 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 to the top of the confluence chamber 511, and the driving bevel gear 5252, the first bevel gear 5253 and the second bevel gear 5254 are rotatably connected to the fixed frame 5251; the driving bevel gear 5252 is sleeved on the driving rod 522, and the first bevel gear 5253 and the second bevel gear 5254 are respectively arranged on both sides of the driving rod 522 and meshed with the driving bevel gear 5252, the first bevel gear 5253 is drivingly connected to the first side rod 5241, and the second bevel gear 5254 is drivingly connected to the second side rod 5242. This arrangement allows the first bevel gear 5253 and the second bevel gear 5254 to be driven by one driving rod 522 at the same time and to perform reverse stirring, while maintaining a stable structure. Furthermore, two groups of side stirring paddle groups 524 are provided, and the straight lines where the two groups of side stirring paddle groups 524 are located are perpendicular to each other.

[0035] Preferably, the multidirectional mixing assembly 52 further includes a protective housing 526, in which the drive rod 522 and the drive gear set 525 are housed. The protective housing 526 prevents the minerals in the slurry from affecting the transmission of the drive gear set 525, thereby increasing the service life of the device.

[0036] After the composite collector is introduced into the collector storage assembly 44, stratification may occur during long-term storage. Therefore, in this embodiment, the collector storage assembly 44 includes 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. 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 sealed with the liquid storage cavity and the connecting channel 433.

[0037] Furthermore, the connecting bellows 443 has extensions at both ends, and a damping spring 445 is sleeved on the connecting bellows 443, with both ends of the damping spring 445 abutting against the extensions. This arrangement provides the connecting bellows 443 with a buffering and vibration-damping capability. When the ultrasonic oscillator 444 is operating, the vibration of the ultrasonic oscillator 444 is prevented from being transmitted to the mixing tube 43 through the connecting bellows 443, thereby ensuring the overall sealing and structural stability of the device.

[0038] Furthermore, a differential pressure valve may be provided on the connecting bellows 443, which adjusts its opening by detecting the pressure difference between the mixing tube 43 and the liquid storage chamber, thereby making the delivery control of the composite collector more precise and effectively improving the overall adjustability of the device.

[0039] In this embodiment, a flow-guiding and impacting mechanism 6 is further included. The flow-guiding and impacting mechanism 6 is disposed at the bottom of the main body 1 and below the converging and mixing mechanism 5. Specifically, the flow-guiding and impacting mechanism 6 employs a conical structure 61 to divide and direct the liquid flow ejected from the converging and mixing mechanism 5, thereby fully mixing the mixed liquid with the micro-nano bubbles generated by the impeller mechanism 2.

[0040] Furthermore, a fixed plate 62 is provided at the bottom of the conical structure 61 of the flow-guiding impact mechanism 6, and an airflow nozzle 63 is provided on the fixed plate 62 around the conical structure 61, and the airflow nozzle 63 is connected to the external compressed gas pipeline. When in use, the airflow nozzle 63 sprays micro-nano bubbles toward the conical structure 61, colliding with the liquid flow ejected from the converging and mixing mechanism 5, forming a turbulent flow, which can further disperse the dispersed liquid flow under the action of the impeller mechanism 2, thereby fully contacting with the micro-nano bubbles generated by the impeller mechanism 2 and the airflow nozzle 63. In addition, the micro-nano bubbles of the airflow nozzle 63 flow along the surface of the conical structure 61, which can prevent the slurry minerals from adhering to the surface of the conical structure 61 or depositing at the edge, further increasing the contact probability between the target minerals in the slurry and the bubbles, thereby enhancing the flotation effect.

[0041] The present invention also provides a mixed flotation method for copper sulfide-molybdenum ore, which uses any of the above-mentioned mixed flotation devices for copper sulfide-molybdenum ore, and the flotation steps are as follows: S1, prepare a composite collector, and pass the composite collector into the collector storage assembly 44; the raw materials of the composite collector include alkoxycarbonyl alkyl dithiocarbamate, butyl xanthate, allyl thiocarbamate, kerosene, pine oil and an activator; S2, grinding, grinding the minerals to a particle size of less than 200 mesh, accounting for 60% to 80%; adding water to adjust the pulp concentration to 20% to 40% and the pH value to 10-11; S3. The slurry is passed into the mixed flotation device of copper-molybdenum sulfide ore. The dosage of the composite collector per ton of ore is 10g to 150g. After the slurry and the composite collector are continuously mixed, the copper-molybdenum concentrate is obtained by froth flotation.

[0042] In this embodiment, the composite collector includes, by mass fraction, 20% to 25% of alkoxycarbonyl alkyldithiocarbamate, 10% to 20% of butyl xanthate, 5% to 15% of allylthiocarbamate, 15% to 25% of kerosene, 5% to 10% of pine oil, and 1% to 5% of an activator.

[0043] In this embodiment, the preparation process of the composite collector is as follows: butyl xanthate, kerosene, and pine oil are mixed, an activator is added, and the mixture is stirred for 30 minutes; alkoxycarbonyl alkyl dithiocarbamate and allyl thiocarbamate are added, and the mixture is dispersed under 800W ultrasound for 40 minutes to form a homogeneous solution.

[0044] Furthermore, after the composite collector is ultrasonically treated, it is transported to the collector storage assembly 44 and continuously ultrasonicated in the collector storage assembly 44 to avoid the phenomenon of stratification of the components of the composite collector due to long-term storage.

[0045] In this embodiment, the synthesis process of alkoxycarbonylalkyl dithiocarbamate is as follows: aliphatic amine reacts with carbon disulfide under alkaline conditions to generate dithiocarbamate, and then alkyl chloroformate is added for condensation reaction, and the alkoxycarbonylalkyl dithiocarbamate is obtained after purification.

[0046] In preliminary tests of the present invention, the copper-molybdenum sulfide ore mixed flotation device provided by the present invention can reduce the collector dosage by 5% to 10% compared to conventional flotation machines, depending on the ratio of the added collector components. Furthermore, at the same collector dosage, the copper-molybdenum sulfide ore mixed flotation device provided by the present invention can increase the copper and molybdenum recovery rate by approximately 0.5% to 1% compared to conventional flotation machines.

[0047] The commercially available reagents used in the following examples are commercially available flotation collectors, and control flotation tests are carried out using the copper sulfide molybdenum ore mixed flotation apparatus provided by the present invention.

[0048] Example 1: Flotation test of a copper-molybdenum mine in Tibet Autonomous Region Ore properties: copper 0.36%, molybdenum 0.018%, sulfur 2.46%, copper oxidation rate 8.06%.

[0049] Grinding: Ore fineness -200 mesh accounts for 70%, the dosage of the present invention's reagent is 50g / ton of ore, and the dosage of the commercially available reagent is 65g / ton of ore.

[0050] Experimental results 1. Experimental-grade reagents: adopt the closed-circuit test process of "one rough, one fine, one sweep".

[0051] Table 1 Preliminary flotation results

[0052] Under laboratory conditions, the composite collector provided by the present invention is used as a flotation agent. When used in a relatively low dosage, a copper-molybdenum concentrate yield of 1.40%, a copper grade of 23.98%, a molybdenum grade of 1.22%, and a copper recovery rate of 92.22% and a molybdenum recovery rate of 94.01% can be obtained. When a commercially available agent is used as a flotation agent, a copper-molybdenum concentrate yield of 1.27%, a copper grade of 22.69%, a molybdenum grade of 1.26%, and a copper recovery rate of 92.82% and a molybdenum recovery rate of 92.24% can be obtained.

[0053] 2. Industrial-grade agent: Use industrial-grade raw materials to expand the preparation of the agent of the present invention (2000 kg).

[0054] Table 2 Results of tertiary flotation concentrate at production site

[0055] Furthermore, industrial-scale comparative tests were conducted at a production site comparing commercially available collectors with the composite collector provided by the present invention. Using the composite collector provided by the present invention as a flotation agent, a floatable coarse concentrate was obtained. After regrinding to 80% of the concentrate to a 400-mesh size, three concentrations yielded a copper concentrate with a copper grade of 29.06%, a molybdenum grade of 1.94%, a copper recovery rate of 91.22%, a molybdenum recovery rate of 90.76%, and an enhanced tailings copper grade of 0.033%. Using a commercially available collector as a collector, three concentrations yielded a concentrate with a copper grade of 28.72%, a molybdenum grade of 1.96%, a copper recovery rate of 90.94%, a molybdenum recovery rate of 89.90%, and an enhanced tailings copper grade of 0.035%. This indicates that even with a reduced usage of the present invention's collector compared to the commercially available collector, the collector's collection performance remains essentially equivalent to that of the commercially available collector, and the enhanced tailings copper grade of the present invention's collector is slightly lower than that of the commercially available collector.

[0056] Example 2: Flotation test of a copper-molybdenum mine in Xinjiang Uygur Autonomous Region Ore properties: copper 0.28%, molybdenum 0.015%, sulfur 3.12%.

[0057] Grinding: Ore fineness -200 mesh accounts for 75%, the dosage of the present invention's reagent is 50g / ton of ore, and the dosage of the commercially available reagent is 65g / ton of ore.

[0058] Table 3 Results of one-time selection at the production site

[0059] For the first concentration, the reagent of the present invention can obtain a concentrate with a copper grade of 23.62%, a molybdenum grade of 0.56%, a copper recovery rate of 93.38%, and a molybdenum recovery rate of 89.63%. When the usage of the reagent of the present invention is less than that of the commercially available reagent, its copper collection capacity is basically equivalent to that of the commercially available reagent, and its molybdenum collection capacity is 2.23% higher than that of the commercially available reagent.

[0060] 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 present invention may be improved in only one or several aspects, without having to simultaneously solve all the technical problems listed in the prior art or background art. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as limiting the claim.

[0061] Although terms such as main body and impeller mechanism are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention. The terms "first" and "second" (if any) in the description and claims of the embodiments of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mixed flotation device for copper sulfide molybdenum ore, used for froth flotation of ore pulp, comprising a main body (1), an impeller mechanism (2) and a scraper mechanism (3), wherein the impeller mechanism (2) is arranged at 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 mineral in the ore pulp to float up, and under the action of the scraper mechanism (3), flow into an overflow trough arranged around the main body (1), characterized in that Also includes: The feeding and mixing mechanism (4) is provided with at least one group and is arranged between the impeller mechanism (2) and the scraper mechanism (3), comprising a mixing shell (41), a slurry feeding disk (42), a mixing tube (43) and a collector storage assembly (44); the slurry feeding disk (42), the mixing tube (43) and the collector storage assembly (44) are arranged in the mixing shell (41); the slurry feeding disk (42) divides the mixing shell (41) into a slurry feeding area (412) and a mixing area (413); the mixing shell (41) is provided with a slurry feeding port (411), the slurry feeding disk (42) is provided with a plurality of slurry dispensing ports (421), the mixing tube (43) is provided with a plurality of slurry dispensing ports (421), and the mixing tube (43) is provided with a plurality of slurry dispensing ports (421). 43) is communicated with the slurry feeding area (412) through the slurry distribution port (421), the feed pipe (441) of the collector storage assembly (44) passes through the slurry feeding plate (42) and extends to the outside of the mixing shell (41), the mixing tube (43) is arranged around the collector storage assembly (44), and a connecting channel (433) is opened on the side wall of the mixing tube (43), the collector storage assembly (44) is communicated with the mixing tube (43) through the connecting channel (433), and the collector storage assembly (44) transports the composite collector into the mixing tube (43) through the connecting channel (433) by pressure difference; A converging and mixing mechanism (5) is provided in the mixing shell (41), comprising a converging plate (51) and a multidirectional mixing assembly (52), wherein the converging plate (51) is provided at the end of the mixing tube (43) and is in communication with the mixing tube (43), wherein the converging plate (51) separates the mixing area (413) into a converging cavity (511), wherein the converging cavity (511) is used to converge and mix the mixed liquid of the ore pulp and the composite collector flowing out of the mixing tube (43) and then spray it out; wherein the multidirectional mixing assembly (52) is provided at the top of the converging cavity (511) and extends vertically downward, wherein the multidirectional mixing assembly (52) performs horizontal and vertical rotation stirring on the mixed liquid in the converging cavity (511).

2. The copper-molybdenum sulfide ore mixed flotation device according to claim 1, characterized in that: The mixing tube (43) comprises a mixing section (431) and a guide section (432); the mixing section (431) has a mixing cavity (4311) that contracts first and then expands; the connecting channel (433) is located at the point where the diameter of the mixing cavity (4311) is the smallest; the guide section (432) has a corrugated flow channel (4321) provided inside; the ore slurry and the composite collector are mixed through the mixing section (431) and then flow along the corrugated flow channel (4321).

3. The copper-molybdenum sulfide ore mixed flotation device according to claim 2, characterized in that: At least two groups of the corrugated flow channels (4321) are provided. The corrugated flow channels (4321) are repeatedly separated and intersected along the length direction of the guide section (432). The intersection point (4322) of the corrugated flow channels (4321) is located on the central axis of the guide section (432).

4. The copper-molybdenum sulfide ore mixed flotation device according to claim 1, characterized in that: The multidirectional mixing assembly (52) comprises a driving motor (521), a driving rod (522), a main stirring paddle (523) and a side stirring paddle group (524), wherein the driving rod (522) is arranged at the output end of the driving motor (521), the main stirring paddle (523) is arranged at an end of the driving rod (522) away from the driving motor (521), and the side stirring paddle group (524) is arranged in 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 (524). 243), 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 to both sides starting from the driving rod (522), and the side blades (5243) are arranged at the ends of the first side rod (5241) or the second side rod (5242); the driving rod (522) is provided with a driving gear set (525), and the driving gear set (525) drives the first side rod (5241) and the second side rod (5242) to rotate in opposite directions.

5. The copper-molybdenum sulfide ore mixed flotation device according to claim 4, characterized in that: 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 to the top of the confluence chamber (511), and the driving bevel gear (5252), the first bevel gear (5253) and the second bevel gear (5254) are rotatably connected to 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 respectively arranged on both sides of the driving rod (522) and meshed with the driving bevel gear (5252), the first bevel gear (5253) is drivingly connected to the first side rod (5241), and the second bevel gear (5254) is drivingly connected to the second side rod (5242).

6. The copper-molybdenum sulfide ore mixed flotation device according to claim 1, characterized in that: The collector storage assembly (44) includes 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. 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 sealed and connected to the liquid storage cavity and the connecting channel (433).

7. The copper-molybdenum sulfide ore mixed flotation device according to claim 1, characterized in that: It also includes a flow guiding and impacting mechanism (6), which is arranged at the bottom of the main body (1) and below the converging and mixing mechanism (5).

8. A mixed flotation method for copper sulfide-molybdenum ore, characterized in that: The copper-molybdenum sulfide ore mixed flotation device according to any one of claims 1 to 7 is used, and the flotation steps are as follows: S1, preparing a composite collector, and introducing the composite collector into a collector storage component (44); the raw materials of the composite collector include alkoxycarbonyl alkyl dithiocarbamate, butyl xanthate, allyl thiocarbamate, kerosene, pine oil and an activator; S2, grinding, grinding the minerals to a particle size of less than 200 mesh, accounting for 60% to 80%; adding water to adjust the pulp concentration to 20% to 40% and the pH value to 10-11; S3. Passing the slurry into the copper-molybdenum sulfide ore mixed flotation device, wherein the amount of the composite collector used per ton of ore is 10g to 150g, the slurry and the composite collector are continuously mixed, and then froth flotation is performed to obtain copper-molybdenum concentrate.

9. The mixed flotation method of copper sulfide-molybdenum ore according to claim 8, characterized in that: Calculated by mass fraction, the composite collector includes 20% to 25% of the alkoxycarbonyl alkyl dithiocarbamate, 10% to 20% of butyl xanthate, 5% to 15% of allyl thiocarbamate, 15% to 25% of kerosene, 5% to 10% of pine oil and 1% to 5% of an activator.

10. The mixed flotation method of copper sulfide-molybdenum ore according to claim 8, characterized in that: The preparation process of the composite collector is as follows: butyl xanthate, kerosene and pine oil are mixed, an activator is added and stirred for 30 minutes; alkoxycarbonyl alkyl dithiocarbamate and allyl thiocarbamate are added, and the mixture is dispersed under 800W ultrasound for 40 minutes to form a homogeneous solution.

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