69results about How to "Improve flotation efficiency" patented technology

The invention discloses an improved efficient turbulent flow microbubble flotation device for feeding and discharging materials. Comprising an outer cylinder, an inner cylinder arranged in the outer cylinder, a stirring mechanism arranged in the outer cylinder, a feeding mechanism used for conveying raw materials into the inner cylinder, a concentrate tank located on the upper portion of the outer cylinder, a countercurrent mineralization mechanism arranged in the inner cylinder and a tailing separation mechanism connected to the bottom of the inner cylinder. Through cooperation of the sawtooth disc self-suction dispersion impeller and the false bottom structure, local area circulation can be formed, the elution effect on the surfaces of coarse particles can be enhanced, meanwhile, dispersion of heterogeneous fine silt is facilitated, and the purity of tailings is further ensured; according to the method, the flotation efficiency can be improved, and the energy consumption is greatly reduced; due to the design of the sawtooth disc self-suction dispersion impeller, gas is allowed to enter in a self-suction mode, and energy consumption of traditional air compression equipment is avoided. According to the sawtooth disc self-suction dispersion impeller, suction force brought by the vacuum effect generated by rotation of the impeller can be improved, and suction of more air is promoted.

The invention relates to the technical field of beneficiation of copper cobalt oxide ores, and discloses a flotation method for high-calcium-magnesium copper cobalt oxide ores and a combined collecting agent. The positive and negative mixed flotation technology is adopted, a combined collecting agent composed of oxidized paraffin soap, sodium oleate and divalent metal cations is adopted in the reverse flotation process, the total recovery rate of copper and cobalt reaches 90% or above, and the leaching acid consumption is 20-60 kg / t.feeding ore. The combined collecting agent adopted by the method is small in dosage, good in collecting performance and small in toxicity, compared with an existing copper oxide cobalt ore flotation technology, the method can improve the copper and cobalt recovery rate by 10% or above, leaching acid consumption is remarkably reduced, the production cost is remarkably reduced, the technological process is simple, and industrial application and popularization are easy.

The invention provides a beneficiation and enrichment method for high-molybdenum oxide ore, which comprises the following steps of: performing fraction magnetic separation on a product after ore grinding, regrinding magnetic separation coarse particle tailings, mixing the reground product with magnetic separation fine fraction tailings to perform low-potential sulphide ore flotation, performing oxidized ore flotation on sulphide ore flotation tailings, and the like. And finally, the molybdenum concentrate with the high recovery rate and grade is obtained, the molybdenum ore separation and enrichment effect is achieved, and the fine disseminated-particle-size refractory molybdenum oxide ore resources in the high-oxidation-type molybdenum ore are effectively and comprehensively recycled. In order to quickly optimize and obtain the optimal condition of oxidized ore flotation, the flotation inhibitor with the good inhibition effect is determined through the pure ore flotation test, the flotation collecting agent with the high selectivity is selected through the molecular simulation calculation method, and the flotation efficiency and selectivity are improved. The method provided by the invention can be widely applied to the fields of development of high-oxidation molybdenum ore mines and recycling of fine-fraction refractory molybdenum oxide ore resources in tailings after sulfuration flotation.

The utility model belongs to the technical field of magnesite processing, and particularly relates to a flotation device for magnesite processing, which comprises a flotation tank and a support frame, the support frame is fixedly connected to the top of the flotation tank, the flotation device is arranged on the support frame, the flotation device comprises a stirring unit and an aeration unit, and a filtering device is arranged on the outer side of the flotation tank. The filtering device comprises a material receiving unit and a filtering unit. According to the flotation device for magnesite processing, a driving motor is started to drive a transmission part to rotate, and then a stirring shaft and a stirring plate on the outer surface of the stirring shaft are driven to rotate, so that ore pulp and an additive in the flotation tank are fully mixed and reacted, and an air blower is started to blow air into an air inlet channel through an air inlet pipe; when the stirring shaft rotates, the stirring shaft drives the flotation scraper to rotate, magnesite floating on the top of the ore pulp is scraped out, and flotation work is completed.

The invention provides a method for recovering copper from bismuth concentrate, which comprises the following steps of: adding water into initial bismuth concentrate for size mixing, not additionally adding an agent, and performing agent (sludge) removal on the initial bismuth concentrate by using agents such as a collecting agent and the like remained in front-end flotation operation and adopting a flotation method, so that residues at the bottom of a flotation tank are removed sludge; carrying out copper-bismuth separation roughing on a foam product obtained by flotation, and carrying out copper-bismuth separation fine-coarse separation on the obtained roughed concentrate to obtain fine-coarse separation concentrate and fine-coarse separation tailings; copper concentrate is obtained through two times of closed-circuit concentration of the concentrate and rough-separation concentrate, and tailings are obtained through two times of closed-circuit scavenging of the concentrate and rough-separation tailings. According to the method, for the copper-bismuth-containing concentrate, the measures of flotation reagent (mud) removal, bismuth mineral inhibition through combination of strong base and a high-efficiency environment-friendly bismuth inhibitor CD-B1, enhanced selective recovery of copper minerals and the like are adopted, the copper-bismuth separation flotation environment is remarkably improved, the flotation efficiency of bismuth inhibition and copper flotation is improved, and effective separation and recovery of low-grade copper in the bismuth concentrate are achieved.

The invention relates to a method for flotation separation of micro-plastics, and belongs to the field of water body micro-plastic separation. The method comprises the steps that in the presence of a foaming agent, a hydrophobic collecting agent and a water body containing the micro-plastics are mixed, and then the micro-plastics are subjected to bubbling flotation; the hydrophobic collecting agent contains dodecahexaenoic acid, eicosapentaenoic acid, cis-oleic acid, cis-linoleic acid and palmitic acid. The method is simple in procedure, easy to operate, low in cost and high in practicability.

The present invention provides a process for removing impurities from medium- and low-grade collophosphite, which first performs reverse flotation to remove magnesium after grinding, then performs gravity separation, and finally performs reverse flotation to remove silicon to obtain phosphate concentrate. After the powder ore is ground and heated, dolomite is preferentially removed by reverse flotation, reducing the content of fine and micro-grained gangue minerals entering gravity separation, improving the efficiency of spiral chute gravity separation to remove fine-grained iron-aluminum-silicate impurities, greatly reducing the content of fine-grained impurities entering the reverse flotation desiliconization process, greatly reducing the adverse effects of fine and micro-grained particles on reverse flotation desiliconization of cationic collectors, greatly exerting the desiliconization efficiency of cationic collectors, significantly improving flotation efficiency, and finally significantly reducing the content of aluminum, magnesium, and silicate in the phosphate concentrate.

The invention relates to the field of iron ore processing, in particular to an iron ore processing method which comprises the following steps: performing pretreatment operation on iron ore to obtain to-be-floated minerals, putting the to-be-floated minerals into a flotation tank of which the bottom is provided with a test air pipe, and performing bubble stability test every other preset period to obtain the to-be-floated minerals. The method comprises the following steps: dividing a flotation tank into a plurality of depth areas at preset same intervals, acquiring mineral density values of the plurality of depth areas in a corresponding period to determine a gradient difference quantity, calculating flotation stability characterization parameters based on the gradient difference quantity in combination with bubble stability characteristics, and dividing stability categories of a flotation process based on the flotation stability characterization parameters, therefore, the adjusting mode of the flotation process is adaptively determined, then it is guaranteed that mineral particles are fully collected through bubbles, and the flotation efficiency of iron ore is improved.

The invention discloses a column-machine combined efficient spodumene flotation method, which comprises the following steps of: after carrying out ore grinding, flotation desliming and size mixing treatment on raw spodumene ore, putting the raw spodumene ore into a flotation machine, and carrying out rapid flotation under the action of a regulator, sodium hydroxide, an activating agent and a collecting agent A to obtain flotation concentrate I and flotation tailings I; and the flotation tailings I are put into the flotation machine again, flotation column flotation is conducted under the action of the adjusting agent and the flotation column containing the collecting agent B, and flotation concentrate II and flotation tailings II are obtained. By optimizing the flotation process and combining the advantages of mechanical flotation equipment and a flotation column, the recovery rate and the concentrate grade of spodumene are effectively improved, meanwhile, reagent consumption is remarkably reduced, and reliable technical support is provided for efficient utilization of spodumene ore.

The flotation recovery method comprises the following steps: carrying out ore grinding and dissociation treatment on raw copper ore, then carrying out roughing, and grading roughing tailings to obtain three-fraction ore pulp products of + 200 meshes, 200-400 meshes and-400 meshes; the + 200-mesh ore pulp product is subjected to coarse grain flotation, a combined collecting agent of disulfide diisopropyl xanthate and isopropyl xanthate is adopted for recycling coarse grain copper minerals, and obtained rough concentrate is returned to the ore grinding operation; carrying out fine particle flotation on the ore pulp product with the size of-400 meshes by adopting a fine particle flotation collecting agent, and combining obtained rough concentrate with copper roughing rough concentrate for concentration; ore pulp products of 200-400 meshes are directly used as tailings. According to the method, the lost coarse and fine copper minerals in the ore pulp can be intensively recovered, and the copper flotation recovery rate can be increased.

The invention belongs to the technical field of phosphorite beneficiation, and particularly discloses a graded flotation method of medium-low-grade silicon-calcium collophanite, which comprises the following steps: crushing collophanite, grinding and mixing to obtain phosphorite pulp, and reselecting by a spiral chute to obtain reselected concentrate and reselected tailings; the gravity concentrate is subjected to magnesium removal reverse flotation and desilicication reverse flotation in sequence, and concentrate and tailings are obtained; gravitational separation tailings are graded through grading equipment, and coarse-fraction products and fine-fraction products are obtained; carrying out desiliconization direct flotation and magnesium removal reverse flotation after grinding the coarse fraction product to obtain concentrate and tailings; thickening the fine fraction product, and sequentially carrying out magnesium removal reverse flotation and desilicication reverse flotation to obtain concentrate and tailings; and combining the concentrates to obtain the phosphate concentrate. According to the gravity separation tailings, coarse fractions which are not fully dissociated are separated out through grading equipment and a grading technology, ore grinding is conducted independently, the ore grinding efficiency can be improved, and minerals can be fully dissociated; the fine fraction in the heavy tailings is directly subjected to double reverse flotation after being thickened, and the flotation efficiency is high.

The aluminum material flotation device comprises a flotation box, a transverse pipe is slidably arranged at the bottom end of the inner wall of the flotation box, the top end of the transverse pipe communicates with a plurality of nozzles, the transverse pipe is connected with the flotation box through a sliding assembly, an overflow plate is fixed to the top end of the flotation box, and discharging openings are formed in the two sides of the bottom end of the overflow plate correspondingly; a connecting plate fixed to the transverse pipe is slidably arranged at the top end of the overflow plate, and a driving assembly for driving the connecting plate to move is arranged at the top end of the overflow plate. According to the scheme, after the spray head sprays foam, under the movement of the driving assembly, the connecting plate is driven to move, the connecting plate drives the transverse pipe and the spray head to move, the transverse pipe and the spray head are made to reciprocate in the flotation box, and therefore the foam can be evenly introduced into the flotation box conveniently, full contact between the foam and an aluminum material is facilitated, and full flotation of the aluminum material is facilitated; and the flotation effect of the aluminum material is improved.

The invention relates to a high-selectivity ilmenite flotation process, belongs to the technical field of flotation, and aims to solve at least one of the problems of poor ilmenite selectivity, poor collecting performance and the like in the conventional flotation method. According to the ilmenite flotation process, the collecting agent of a specific structure is selected, the two hydroximido groups and the two imino groups are introduced into the same molecular structure, and the binding capacity between the collecting agent and metal ions can be improved through a solid-loving group composed of the two hydroximido groups; the adsorption stability of the whole collector molecules on the surface of the mineral is enhanced, and the collecting performance and selectivity of the collector molecules are improved; meanwhile, a plasma pretreatment method is adopted for the raw ore, the surface structure of the ore is changed, impurities on the surface of the ore are reduced, the reaction activity of the surface of the ore is enhanced, and the surface property difference between the ilmenite and forsterite is improved, so that collecting agent molecules can chemically react with the surface of the ilmenite under the weak acid condition, and the flotation separation efficiency of the ilmenite is improved; and the consumption of sulfuric acid is reduced.

The invention discloses coal flotation equipment and method, and belongs to the technical field of coal flotation equipment.The coal flotation equipment comprises a flotation box body, supporting legs are arranged at the corners of the lower end of the flotation box body, a first discharging pipe is arranged at the lower end of the side edge of the flotation box body, and a coal flotation collecting box body is arranged on the side edge of the flotation box body; universal wheels are arranged at the lower end of the coal flotation collecting box body, a second discharging pipe is arranged at the lower end of the side edge of the coal flotation collecting box body, and an electric air cylinder is arranged at the corner of the lower end of the flotation box body. And meanwhile, the air inlet structure and the stirring structure can be efficiently matched for use, so that ore pulp and air can be fully mixed to improve the coal flotation efficiency, and meanwhile, after coal flotation is completed, the stirring structure can be lifted from the interior of the flotation box body to facilitate follow-up scraping work.

The utility model belongs to the technical field of gold ore recovery, and particularly relates to an ore dressing device capable of improving the gold ore recovery rate, which comprises an ore dressing tank and an ore collecting hopper, the ore collecting hopper is fixedly connected to the top of the outer surface of the ore dressing tank, an ore collecting device is arranged on the left side of the ore collecting hopper, and a flotation device is arranged in the ore dressing tank. According to the ore dressing device capable of improving the gold ore recovery rate, gold particles discharged through flotation are mixed in flotation foam, discharged into an ore collecting hopper and converged into an ore collecting box through a discharging opening, then a water pump is started to pump water from a water source in a water storage tank into a water conveying pipe, the water is sprayed out from a shower nozzle on the top of the water conveying pipe, the floating foam and ore pulp are cleaned, and the gold ore recovery rate is increased. And the air blower is started, air is blown into the air inlet channel through the air inlet pipe and then flows to the nozzle on the exhaust pipe to be sprayed out, so that the ore pulp is aerated, and the flotation efficiency is improved.

The invention relates to the field of coal gangue machine-made sand, and particularly discloses a quartzite coal gangue machine-made sand detection method. The quartzite type coal gangue machine-made sand detection method comprises the steps that quartzite type coal gangue machine-made sand is taken as a detection sample, the quartzite type coal gangue machine-made sand is separated from stone powder suspension liquid through flotation method treatment, and the quartzite type coal gangue machine-made sand is removed; and placing the separated stone powder suspension in a laser scatterometer, collecting laser scattering data through a computer at the wavelength of 450-700nm, the scattering angle of 15-30 degrees and the scanning time of 30-40s, and comparing the laser scattering data with a stone powder content standard curve. The quartzite coal gangue machine-made sand detection method has the advantage that the content of stone powder in machine-made sand can be rapidly and accurately detected.

The invention relates to a flotation separation method for recovering pyrite from barite associated ore. The invention relates to a flotation separation method for recovering pyrite from barite associated ore. The flotation separation method comprises the following steps that raw ore is taken and put into a flotation tank to be subjected to size mixing treatment; a regulator is added into the ore pulp, the pH value is regulated, and then a barite inhibitor, a collecting agent and a foaming agent are sequentially added; and at least two times of roughing and one time of scavenging are conducted on the ore pulp, and finally a pyrite product and a barite product are obtained respectively. According to the flotation separation method for recycling the pyrite from the barite associated ore, the aluminum salt modified water glass with the selective inhibition capacity is used for effectively inhibiting barite, and the pyrite can be better separated out; meanwhile, carbon dioxide gas is used for replacing sulfuric acid to regulate and control the pH of the system, the floatability of the pyrite can be remarkably improved, and meanwhile potential safety hazards and environmental pollution are reduced.

The invention discloses a beneficiation method for improving the nickel recovery rate of high-content talc nickel sulfide ore. The beneficiation method comprises the following steps that A, raw materials are pretreated; b.1, a roughing process: feeding the ore pulp A3 obtained in the step A.3.1 into a roughing flotation machine to carry out roughing operation for four times; b.2, the roughing concentrate B1 obtained in the step B.1 is fed into a stirring tank, and 280 g / t of CMC, 550 g / t of water glass and 50 g / t of butyl xanthate are added; c.1, primary fine selection; c.2, carrying out secondary fine selection; c.3, third-time concentration: feeding the secondary concentrate product C3 into a flotation machine for third-time concentration, adding water to adjust the concentration of ore pulp to 12-15%, filling 3122 Am < 3 > / h into the ore pulp, and carrying out flotation for 10-12 minutes to obtain a third-time concentrate product C5 and third-time concentration tailing products C6 and C5 which serve as final concentrates to be concentrated and filtered for sale; and the third-time concentration tailing product C6 is fed into the step C.2.

The invention relates to the technical field of mineral processing, in particular to a vein quartz ore flotation reagent capable of efficiently removing iron, which is prepared from mixed amine, ethylenediamine, absolute ethyl alcohol, polymerized alpha-D-glucopyranose and diesel oil. According to the present invention, the iron-containing oxide in the vein quartz ore can be effectively removed through the reaction with the iron-containing oxide in the direct flotation process, and the method has advantages of low agent consumption, environmental protection, and good cost economy compared with the traditional acid soaking process and the flotation agent.

The invention relates to the field of ore flotation, in particular to tantalum-niobium ore flotation equipment. The tantalum mud ore flotation equipment has the defects that the tantalum mud ore attached to foam sinks into ore pulp again due to the fact that the tantalum mud ore is prone to remaining on a discharging ramp, and the tantalum mud ore flotation efficiency is low due to the fact that paddles of existing tantalum mud ore flotation equipment are prone to collecting and dispersing foam. Tantalum-niobium ore flotation equipment comprises a support and the like. A flotation box is fixedly connected to the support, two lifting sliding grooves are formed in the inner wall of the flotation box, a discharging inclined face is arranged at the bottom of the inner wall of the flotation box, and a discharging opening is formed in the bottom of the discharging inclined face on the flotation box. Ore pulp and a collecting agent in the stirring barrel are continuously mixed through the six sets of foaming screen plates, the foaming effect of the collecting agent can be better, the flotation efficiency of tantalum mud ore is improved, meanwhile, the scraping plate can be lifted upwards after scraping floating foam, the situation that the floating foam on the surface of the ore pulp is scraped in the reset process is avoided, and the flotation efficiency of tantalum mud ore is improved. Therefore, the situation that the tantalum mud ore sinks into the ore pulp again due to the fact that the scraper crashes floating foam can be reduced.

The mechanical stirring flotation machine comprises a flotation box, a first air distribution pipe, a first arc-shaped plate and a motor, the first air distribution pipe is connected into the flotation box in a sliding mode, the motor is fixed above the flotation box, an L-shaped connecting rod is arranged on the side face of an output shaft of the motor, the first air distribution pipe is provided with a first transmission block, and the first transmission block is provided with a first strip-shaped groove. The lower end of the L-shaped connecting rod penetrates into the first strip-shaped groove, the motor drives the first air distribution pipe to move in a reciprocating mode in the transverse direction when working, the first air distribution pipe comprises first longitudinal pipes and first transverse pipes, the first longitudinal pipes are connected with the first transverse pipes, the first longitudinal pipes are provided with a plurality of air outlet holes, and the first arc-shaped plates are arranged between the first longitudinal pipes. And the convex surface of the first arc-shaped plate faces upwards. The utility model provides a mechanical stirring flotation machine which can be matched with a square flotation box body, the edge position in the flotation box body can be stirred, and the stirring effect is improved.

The invention discloses a scraper for ore flotation, and specifically relates to the technical field of scrapers. The invention comprises a flotation machine body, a motor is arranged on one side of the flotation machine body, an impeller is arranged inside the flotation machine body, the impeller is connected to the output end of the motor, a bracket is arranged on one side of the flotation machine body, an electric shaft is arranged on one side of the bracket, a connecting rod is fixedly connected to the surface of the electric shaft, a scraper is fixedly connected to one end of the connecting rod, and a collecting device for recovering and screening the ore attached to the scraper surface is arranged on one side of the bracket. The invention can quickly clean and collect the minerals remaining on the scraper by arranging the collecting device, thereby reducing the situation that the scraper surface is always attached with minerals when scraping floating mineralized foam, resulting in the minerals remaining on the scraper surface cannot be effectively processed and personnel are required to perform secondary recovery, thereby improving the overall flotation efficiency.

The application discloses a coarse particle flotation machine, and particularly relates to the technical field of flotation machines, which comprises a flotation bin, a flotation mechanism, a driving mechanism, a scraping mechanism and a feeding mechanism, and further comprises a protection mechanism and a deposition treatment mechanism. Through the arrangement of the protection mechanism, the first jetting ports arranged in an inclined manner can spray upwardly moving rotating air flow to the inner wall of the flotation bin during the working process of the flotation machine. On the one hand, the coarse particles can be effectively reduced in deposition at the bottom or the corners, and when the coarse particles sink due to gravity, the upwardly moving rotating air flow can push the particles to move along a spiral track, prolong the residence time of the particles in the bubble enrichment area, and increase the collision frequency of the particles and the bubbles. On the other hand, the sprayed gas can form bubbles, the bubbles can collide with the coarse particles in the ore pulp, provide buoyancy for the upward floating of the coarse particles, reduce the deposition of the particles, and thus improve the recovery rate of the coarse particles and the flotation efficiency.

The utility model discloses a device convenient to collect carbon residue, which relates to the technical field of carbon residue collection, and comprises a flotation tank body, a stirring device is arranged in the flotation tank body, the bottom of the flotation tank body is connected with a collecting pipe, the bottom of the stirring device is connected with a rotating rod extending into the collecting pipe, and the rotating rod is connected with a rotating shaft. The outer wall of the rotating rod is provided with a threaded part and limiting grooves, and the limiting grooves are located in the two ends of the threaded part. According to the device convenient for collecting the carbon residues, the lifting block can ascend to block the residue outlet through the matching of the threaded part on the outer wall of the rotating rod and the limiting groove, so that the device can conveniently perform flotation separation on materials; and meanwhile, when the lifting block descends, the slag outlet hole can be communicated with the interior of the collecting pipe, so that the carbon slag in the flotation tank body is collected and cleaned out, and the function of automatically cleaning the carbon slag in the flotation tank body is achieved.

The utility model belongs to the field of pretreatment research of environmental pollutants, and particularly relates to a soil and sediment micro-plastic circulating flotation device which particularly comprises a batch pretreatment system and a full-automatic double-vacuum circulating flotation system. The batch pretreatment system comprises a multi-head magnetic stirrer, a matched magnetic stirrer, a magnetic stirrer controller and a plurality of sets of upper nozzle suction flasks; the full-automatic double-vacuum circulation type flotation system comprises a programming type power supply control unit, a double-vacuum suction filtration unit, a flotation liquid circulation unit and a lifting table unit. The micro-plastic circulating flotation system effectively solves the problem that in the flotation process of the micro-plastic circulating flotation system, the flow speed of the circulating pump needs to be adjusted according to the pressure of the suction filtration pump, and then the process of suction filtration and circulation can be achieved at the same time. Vacuum filtration of micro-plastic can be achieved under the condition that no vacuum filtration pump is additionally arranged, the flow speed of a water pump does not need to be manually adjusted, and flotation liquid cannot overflow; and suction filtration circulation without manual guarding can be realized, and manpower and material resources are saved.

This application discloses a flotation device for mineral processing, including a flotation chamber, a screening component on one side of the flotation chamber, a screening chamber at the upper part of the screening component, a first screen plate inside the screening chamber, a guide chamber at the lower part of the screening chamber with its opening facing the flotation chamber, a vibrating part at the lower part of the guide chamber, and a support rod at the bottom of the guide chamber. By placing mineral particles into the screening chamber at the upper part of the screening component and then screening them through the first screen plate inside the screening chamber, the volume and weight of the mineral particles can be controlled to prevent them from becoming overweight and to avoid them being unable to be lifted during froth flotation, thereby improving the flotation efficiency of the mineral particles.

The present invention relates to the field of flotation technology, and in particular to a molybdenum ore flotation equipment and process, comprising a frame and a stirring mechanism, wherein the frame has a stirring chamber inside, the stirring mechanism comprises a rotating shaft, a fixed cylinder is fixed on the frame, an air inlet pipe is connected to one side of the fixed cylinder, one end of the air inlet pipe is communicated with the inside of the fixed cylinder, the air inlet pipe is used to pass gas into the fixed cylinder, and the gas passes into the ore pulp liquid from the lower end of the fixed cylinder; the axis of the rotating shaft extends in the up-down direction, the rotating shaft is vertically arranged and rotatably penetrated in the fixed cylinder, the lower end of the rotating shaft is connected with a stirring wheel, the stirring wheel has stirring blades, the lower end of the fixed cylinder is rotatably connected with a spoiler, the spoiler is located at the periphery of the stirring wheel, and is coaxially arranged with the stirring wheel, the spoiler has spoiler blades, the spoiler is connected to the rotating shaft through a reversing mechanism, and when the driving mechanism drives the rotating shaft to rotate, the stirring wheel and the spoiler rotate in opposite directions. The present invention can reduce the possibility of bubble rupture and improve the efficiency of flotation.

The present invention belongs to the field of mineral processing technology, and particularly relates to a cascaded mineral processing technology for precious metals. The method adopts a combination of multi-stage flash flotation and preferential flotation. Under the action of a trace amount of special reagents, the method uses the technical means of grinding and selecting to carry out cascade recovery of precious metal minerals with different floatability. While avoiding the loss of the monomer-dissociated precious metal mineral particles due to over-grinding, the target minerals with good floatability and early monomer dissociation are preferentially recovered as much as possible to ensure their quality, and at the same time, the interference of uneven embedded particle size on the flotation process of precious metals is reduced, realizing the technical concept of "collecting as much as possible, collecting as early as possible, and increasing environmental protection". Compared with the prior art, the present invention effectively avoids the loss of the monomer-dissociated precious metal mineral particles due to over-grinding, and reduces the workload of subsequent selection operations. It not only improves the flotation efficiency of the target minerals, reduces the loss of precious metal minerals in tailings, but also improves the comprehensive utilization rate of resources.

The application discloses a method for recovering lead metal in a contaminated solution by combining bio-mineralization and flotation, which comprises the following steps: 1, bacterial activation; 2, bacterial expansion; 3, adding urea and bacterial cementing solution into the contaminated solution, and performing mineralization by shaking bed oscillation to obtain a mineral slurry; 4, adding a foaming agent into the mineral slurry and stirring; 5, adding a collecting agent into the uniformly foamed mineral slurry, and then transferring the slurry into a flotation column with a leaching and defoaming device to perform flotation; and 6, centrifuging and drying the recovery product in a collecting tank to realize recovery of the lead metal.

The invention aims at providing a method for preparing high-purity calcium hydroxide through carbide slag low-temperature calcination-multi-stage swirl jet flotation, and belongs to the technical field of carbide slag comprehensive utilization. The working process comprises the steps that carbide slag is calcined, water is added to prepare slurry, the slurry is introduced into a multi-stage swirl jet flotation device, and the high-purity calcium hydroxide is obtained; opening the tube flotation device to stir rotational flow, adding a flotation reagent to perform rotational flow type flotation, enabling low-density particle slurry to slowly flow out from an overflow port through a rotational flow force field to form concentrate, enabling medium-density particle slurry to flow out from the inner inverted cone to form middling, enabling the middling to circularly enter the column body, and enabling high-density particle slurry to flow out from the space between the inner inverted cone and the outer inverted cone to form tailings, namely Ca (OH) 2 slurry; carrying out solid-liquid separation on the collected tailing slurry; and drying the solid by a vacuum drying method to obtain a high-purity calcium hydroxide product. The method has the characteristics of good economical efficiency, small occupied area, replacement of a traditional flotation unit, reduction of operation cost and economic cost, and easiness in operation and use.