105results about "Differential sedimentation" patented technology

A method for removing particles from water, the method comprising: supplying gelatinous zooplankton mucus to water comprising particles; allowing formation of particle aggregates in the water by allowing interaction between the particles in the water and the gelatinous zooplankton mucus; removing the particle aggregates from the water by passing the water comprising particle aggregates through a filter configured to receive water comprising particle aggregates and further filter the water; and exiting filtered water from the filter. A system for removing particles from water with the aforementioned method is also provided. Additional embodiments of the system and method for removing particles from water are disclosed herein.

The invention discloses a reagent group for synergistically promoting sedimentation and rheological properties of high-alkali flotation copper tailings and application, and belongs to the technical field of tailings treatment. The agent group comprises an interface regulating agent A and a flocculating agent B; the interface regulating agent A simultaneously contains sodium stearate and sodium laurate; and the flocculant B is anionic polyacrylamide. In the treatment process of the high-alkali flotation copper tailings, an interface regulating agent A and a flocculating agent B are added at the same time to treat fine particles of the copper tailings. The interface regulating agent A is used for copper tailing surface modification, the flocculating agent B is used for copper tailing fine particle aggregation, the copper tailing fine particles are rapidly flocculated and settled through the synergistic effect of the interface regulating agent A and the flocculating agent B, and the rheological property of ore pulp is improved. Through the synergistic effect of the trace interface regulating agent and the flocculating agent, the sedimentation rate of the ore pulp can be effectively increased, meanwhile, the flowability of the ore pulp is improved, the conveying energy consumption of the ore pulp is reduced, and pipeline abrasion is reduced.

A method (10) for material-specific fibre separation in textile recycling comprises the following steps: i) providing a fibre mixture, comprising fibres of different fibre materials, in the form of a suspension (S18), ii) adding an additive into the suspension, and iii) separating fibres of one fibre material from the rest of the fibre mixture by flotation. According to the invention, step iii) includes a step iii-a) (S30) of separating first fibres of a first fibre material from the rest of the fibre mixture by flotation and a step iii-b) (S36) of separating second fibres of a second fibre material from the rest of the fibre mixture by flotation, wherein step ii) includes, before step iii-a), a step ii-a) (S28) of adding a first additive into the suspension for changing the flotation behaviour of the first fibre material and, before step iii-b), a step ii-b) (S34) of adding a second additive into the suspension for changing the flotation behaviour of the second fibre material, the first additive and the second additive differing at least in their respective physical operating principles, which are based on an interaction of the respective additive with the respective fibre material that changes the floatation behaviour of the respective fibre material.

A treatment device for fluorine-containing waste water comprises: a first coagulation treatment unit for performing coagulation treatment on fluorine-containing waste water by using an inorganic coagulant and a calcium compound; the first precipitation treatment unit is used for precipitating and separating the coagulation reaction liquid from the first coagulation treatment unit; a second coagulation treatment unit for performing coagulation treatment by adding an inorganic coagulant to at least a portion of the treated water from the first precipitation treatment unit; the turbidity removal membrane device is used for carrying out membrane separation treatment on the coagulation reaction liquid from the second coagulation treatment unit; a reverse osmosis membrane device which is supplied with the membrane permeated water from the turbidity removal membrane device and separates the membrane permeated water into permeated water and concentrated water; a means for taking out permeated water from the reverse osmosis membrane device; the third coagulation treatment unit is used for performing coagulation treatment on the concentrated water from the reverse osmosis membrane device by using an inorganic coagulant and is separated from the first coagulation treatment unit; and a second precipitation treatment unit for precipitating and separating the coagulation reaction liquid from the third coagulation treatment unit.

A method, system, and apparatus for recovering fine heavy minerals from particulate ore. At least two inclined recovery surfaces are provided for parallel operation, and a liquid slurry containing the heavy minerals is supplied to at least one of the surfaces to remove the heavy minerals from the slurry in a heavy minerals capture cycle. In a cleaning cycle, the heavy minerals are released from the at least one surface for collection, which release is preferably achieved by applying water jets which may be disposed on spray bars positioned along the length of the surface and may be applied sequentially to drive the heavy minerals toward a discharge end for collection. A valve arrangement allows the liquid slurry to engage one surface for the heavy mineral capture cycle, while diverting the liquid slurry away from another surface to allow the cleaning cycle, and the valve arrangement may be automatically controlled.

The present application relates to the technical field of mineral processing, and provides a siderite directional enrichment and separation integrated process, which comprises the following steps: ore pretreatment, ore slurry directional dispersion and selective flocculation regulation, batch flotation separation, product refining and wastewater recycling four links, each link is accurately matched based on mineral surface electrical property and adsorption characteristic parameters, the iron element grade of siderite after flotation can be increased by more than 15%, the highest recovery rate can reach 76.70%, the iron grade can be increased to 59.90% at most, the high-value recovery of low-grade multi-element symbiotic siderite is realized, and the tailing discharge amount is reduced by 15%; the wastewater is closed-loop recycled without external discharge, and the first-level requirement of the comprehensive wastewater discharge standard is met.

To provide a water purifying agent which has a low content of components insoluble in water and is excellent in water purifying performance, a method for producing the same, an organic coagulant which can be suitably used for the water purifying agent, and a method for producing the same.SOLUTION: The organic coagulant contains a plant extract, and the water purifying agent contains the organic coagulant and a polymer flocculant.SELECTED DRAWING: None

The invention provides a system and method for reducing filtered moisture of fine-ground hematite and limonite, and the system sequentially comprises a ball mill used for carrying out wet type fine grinding on raw hematite and limonite; the classification cyclone and the ball mill form a closed-loop ore grinding loop and are used for controlling the overflow granularity; the thickener is used for receiving overflow of the grading cyclone and is used for increasing the ore pulp concentration; the disc vacuum filter is connected with the thickener underflow and is used for carrying out vacuum filtration on the concentrated ore pulp; the water ring type vacuum pump is used for providing a filtering vacuum degree for the disc vacuum filter; wherein a cationic polyacrylamide flocculating agent is added into the thickener. According to the system, on the premise that a filter aid is not used and a filter press is not replaced, through four-parameter coupling of'granularity-concentration-flocculation-vacuum ', the filtering driving force is upgraded from'single vacuum degree' to a new mechanism of'controllable capillary channel structure and accurate vacuum degree matching ', and the water content of a filter cake is smaller than or equal to the pelletizing requirement.

Provided is a flocculation state monitoring sensor with which blockage of an ejecting part which ejects a gas towards a light emitting part and a light receiving part can be prevented, and which performs stable monitoring. A flocculation state monitoring sensor comprising: a light emitting part 3 which irradiates laser light towards a measuring region S which measures a flocculation state; and a light receiving part 4 which receives light scattered along a direction which intersects with a direction along an optical axis of said light emitting part 3, wherein the light emitting part 3 and the light receiving part 4 are cleaned by air being ejected from nozzles 21, 31 theretowards. A small amount of air is provided to the nozzles 21, 31 between cleaning periods to purge floe, etc.

To efficiently separate dust from dust-collected water, using an additive in the treatment of converter exhaust gas dust-collected water. The method for treating converter exhaust gas dust-collected water of the present invention treats converter exhaust gas dust-collected water by separating coarse dust, in a coarse particle separator, from dust-collected water containing dust obtained by wet dust collection from a converter exhaust gas with a wet dust collector, followed by coagulation and settlement in a thickener. The method includes measuring the water temperature of the dust-collected water at a position of a first flow path allowing the dust-collected water to flow from the outlet of the wet dust collector to a position within the coarse particle separator, and adding a flocculant in a concentration appropriate to the amount of dust in the dust-collected water estimated from changes in the water temperature into the dust-collected water at at least one position of the first flow path and a second flow path that is from the outlet of the coarse particle separator to a position within the thickener. The water temperature is preferably measured with a non-contact thermometer.

The present application relates to the technical field of mineral processing, and discloses a preparation and adding method and system of a vanadium-titanium magnetite mineral processing flocculant, the preparation and adding method of the vanadium-titanium magnetite mineral processing flocculant comprising: classifying flocculant adding points according to the ore pulp information corresponding to the flocculant adding points, connecting the flocculant adding points and a flocculant preparation point based on the classification results; at the flocculant preparation point, preparing the flocculant according to the classification results to obtain the prepared flocculant; and adding the prepared flocculant into the ore pulp through the flocculant adding points connected with the flocculant preparation point. Through the above scheme, the present application realizes the classification and accurate addition of the flocculant oriented by the ore pulp properties, realizes the efficient sedimentation and dewatering of the ore pulp, improves the sedimentation effect, and reduces the consumption of the flocculant and the production cost.

This invention relates to a method for treating solid particle suspensions in water using a water-soluble polymer obtained from the crystalline form of ATBS.Na. This method is particularly useful for treating residues generated from the mining industry.

This invention discloses a composite treatment agent and method for the settling and transportation of tailings in extra-large copper mines, belonging to the field of tailings treatment technology. The composite treatment agent comprises the following molecular structure component A and polyacrylamide component B: where x / y = (6~8):1; n is 52~85, and R1 and R2 are independently selected from hydrogen or methyl. In the process of treating copper tailings slurry, component A is first used to regulate the interface of the copper tailings, and then polyacrylamide is added for flocculation, so that the fine copper tailings particles can be rapidly flocculated and settled to form a dense concentrated underflow, which is then transported to the tailings dam with low energy consumption. This method can improve the slurry settling speed and the concentration of the concentrated underflow, while also improving the slurry fluidity and transportation efficiency, reducing the energy consumption of slurry transportation and pipeline wear, and requiring less reagent, thus saving costs.

The present invention intends to disclose a process for in situ flocculation followed by solidification of biomedical waste that is capable of simultaneously treating and disinfecting solid and fluid samples. The process comprises of the addition of the waste samples to an alkaline aqueous solution of metal silicates followed by the addition of an organic or inorganic acid for flocculation and a solid metal oxide or phosphate at a defined volumetric and / or weighted composition leading to instantaneous solidification with >99.9% microbial disinfection and an all-in-one disinfecting device for treatment of biomedical waste. The present disclosure also provides a disinfection-flocculation-solidification and disposal device comprising the disinfection composition.

This invention relates to a selective flocculation flotation separation method for positive and negative electrode materials of lithium iron phosphate batteries, belonging to the field of waste lithium battery recycling technology. The method includes: discharging and disassembling a lithium iron phosphate battery to obtain copper foil containing negative electrode material and aluminum foil containing positive electrode material; mixing the positive electrode aluminum foil and negative electrode copper foil in a specific ratio, coarsely crushing, performing a first wet sieve, fine crushing, a second wet sieve, and then filtering and drying to obtain a mixed positive and negative electrode powder of the lithium battery; mixing the mixed positive and negative electrode powder with water to obtain a flotation slurry of a certain concentration; stirring and adjusting the flotation slurry to obtain a first slurry; adding polyvinylpyrrolidone to the first slurry and stirring to obtain a second slurry; adding polyacrylic acid to the second slurry and stirring to obtain a third slurry; adding a collector to the third slurry, stirring, adding a foaming agent, stirring, aerating and skimming, and recovering the foam product (negative electrode material) and the product in the tank (positive electrode material).

The invention discloses anionic polyacrylamide for accelerating particle sedimentation of copper ore pulp. The anionic polyacrylamide is prepared from the following components in parts by weight: 110 to 120 parts of acrylamide, 15 to 20 parts of acrylic acid, 5 to 6 parts of urea, 0.001 to 0.005 part of sodium formate, 0.001 to 0.003 part of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 0.01 to 0.03 part of ammonium persulfate, 0.01 to 0.025 part of sodium hydrogen sulfite and 360 to 370 parts of deionized water. The invention also provides a preparation method of the anionic polyacrylamide. The anionic polyacrylamide disclosed by the invention can accurately adapt to the characteristics of the copper ore pulp, efficiently accelerate particle sedimentation of the copper ore pulp, and can form a stable and compact flocculating agent.

This invention discloses the application of a nitrogen-containing heterocyclic thionate compound in the preparation of sulfiding agents. Nitrogen-containing heterocyclic thionates are stable and possess not only a thiocarbonyl sulfur atom as the reaction center in their molecular structure, but also electron-donating atoms such as nitrogen, oxygen, and sulfur on their heterocycles, enabling selective flotation separation of copper, lead, zinc, and iron sulfide minerals. However, there are currently no reports on the use of nitrogen-containing heterocyclic thionates as sulfiding agents for oxidized minerals.

The invention relates to the technical field of coal flotation, and particularly discloses a flotation tailing treatment method for strengthening middling coal sedimentation and rapid separation. According to the method, aiming at the problems of large fine coal ash fluctuation and low middling coal recovery rate caused by middling coal entrainment in the existing flotation process, a roughing-scavenging-concentration three-section separation process is coupled with a middling coal reflux concentration technology. Tailings generated by three-section flotation are specially treated, and sedimentation and aggregation of middling coal particles are strengthened by adding a flocculating agent into the tailings and introducing a middling coal separation hopper with an optimized structure; by improving the underflow discharging mode of the separation hopper, high-concentration medium coal slurry is rapidly discharged, and overflow returns to the scavenging section to recover residual clean coal. According to the method, stable control over the clean coal product quality and synchronous increase of the middling coal recovery rate are achieved, the technical bottleneck of a traditional mixing separation process is solved, and economic benefits are remarkable.

The invention provides a method for recovering micro-fine-particle ilmenite through magnetic bead flocculation, which comprises the following steps of: sequentially carrying out high-gradient magnetic separation, ore grinding, magnetic bead flocculation and magnetic separation on tailings containing the micro-fine-particle ilmenite to obtain ilmenite concentrate; in terms of each ton of tailings, the following compositions are added in the magnetic bead flocculation process: 1000 to 6000 g of sulfuric acid, 1000 to 10000 g of carboxyl magnetic beads, 50 to 500 g of styrene phosphonic acid and 100 to 1000 g of diesel oil. According to the method provided by the invention, selective flocculation of the ilmenite in the micro-fine particle level can be realized, the particle size of the ilmenite floccules is increased, and the method has the characteristics of good comprehensive ilmenite recovery effect and high titanium recovery rate.

The invention discloses a purification method of magnetite concentrate, and belongs to the technical field of extreme purification of magnetite concentrate. The purification method comprises the following steps: carrying out ultrafine grinding on a magnetite concentrate raw material, adding alkali metal hexametaphosphate and alkali metal silicate, carrying out flocculation desliming to obtain primarily purified magnetite, and adding a magnetite inhibitor, a composite collector and an activator into ore pulp containing the primarily purified magnetite for reverse flotation, the composite collecting agent comprises fatty amine and a zwitterionic surfactant, and the activating agent comprises a calcium compound and a rare earth compound. The separation and removal effects of gangue minerals and impurity metal elements are greatly improved through flocculation desliming and a specific flotation reagent system, the yield and recovery rate of the high-purity magnetite concentrate are improved while the grade of the magnetite concentrate is improved, and the method is simple, low in cost, small in reagent dosage in the flotation process, environmentally friendly and suitable for industrial application.

The present invention discloses an improved method for effective solidification of biomedical waste, which is capable of simultaneously treating and sterilizing solid and fluid samples. The method includes adding the waste sample to an alkaline aqueous solution, followed by adding solid materials of defined volumetric and / or mass composition to result in instant solidification and >99.9% microbial kill, and an integrated sterilization device 10 for the treatment of biomedical waste.

The invention relates to the technical field of mineral separation, in particular to a method for separating micro-fine quartz and mica through selective flocculating settling. According to the technical scheme, the method comprises the following steps: providing a mixed mineral raw material of micro-fine particle quartz and mica, wherein the particle size of the mixed mineral raw material is less than 48 microns; according to the method, efficient separation of the micro-fine quartz and the mica is achieved through the selective flocculation effect of the anionic polyacrylamide under the natural pH condition, the method is simple in process and environmentally friendly, acid-base adjustment is not needed, and the operation complexity and the agent cost are remarkably reduced; the selective flocculation effect on mica is outstanding, two-phase separation can be rapidly achieved, and the problems that fine-particle minerals are low in separation efficiency and prone to entrainment in the traditional separation process are effectively solved; meanwhile, the method is high in adaptability and suitable for a micro-fine particle mineral system, and comprehensive recovery of mica is achieved while the purity of a quartz product is improved.

The utility model discloses a tailing conveying device which comprises a bottom plate, two supporting plates are fixedly connected to the upper side of the bottom plate, a conveying channel is fixedly connected to the top ends of the two supporting plates, a conveying mechanism is arranged on the inner side of the conveying channel, and a storage box is connected to one end of the conveying channel. The device comprises a bottom plate, two climbing frames are fixedly connected to the upper side of the bottom plate, two connecting columns are fixedly connected to the opposite sides of the two climbing frames, a stirring barrel is fixedly connected to the opposite sides of the two connecting columns, and a stirring mechanism is arranged on the inner side of the stirring barrel. Compared with the prior art, the tailing conveying device has the advantage that the tailing conveying device with the stirring function is provided.

This invention discloses a flotation reagent for controlling the entrainment of silicate gangue and its flotation method, belonging to the field of mineral separation technology. It solves the problem that existing flotation reagents cannot overcome the severe gangue entrainment caused by the small particle size of gangue in lean and difficult-to-process ores. The silicate gangue entrainment-controlling flotation reagent of this invention includes a silanoxy-modified hyperbranched polymer; the silanoxy-modified hyperbranched polymer is synthesized from hydrophilic organic macromolecules, silane coupling agents, and chemical auxiliaries. This invention, through the silanoxy-modified hyperbranched polymer, can effectively reduce gangue entrainment, lower concentrate ash content, and improve concentrate grade, which is of great significance for the efficient flotation of lean and difficult-to-process ores.

A small washing apparatus for washing trades equipment of the type comprising a settlement tank in which washout water is collected and treated with coagulant to produce flocked waste solids and relatively clean water. The apparatus further comprising an upper structure removably supported by the settlement tank, the upper structure comprising a wash basket in which to wash the trades equipment, and a filter support for supporting a filter bag integrally disposed within a portion of the wash basket. In use the wash basket extends into said settlement tank and a substantial portion of said filter support extends upwardly above the level of said wash basket.

A composition is provided comprising a cationic block copolymer and a cationic polyacrylamide having a charge density ranging from 2% to 100%. In some embodiments, the cationic block copolymer is part of a cationic polymer surfactant ensemble. The composition can be used to remove solids from a solid-liquid mixture. The method may include adding the composition to a solid-liquid mixture; b) stirring the solid-liquid mixture with the composition; and c) removing the solids from the stirred mixture. The method may include a) mixing a cationic polyacrylamide polymer with the cationic polymer surfactant ensemble, thereby forming a conditioned flocculant; b) stirring the conditioned flocculant with the solid-liquid mixture, thereby forming a stirred mixture; and c) removing the solids from the stirred mixture.

Improved methods for the removal of heavy metals, in particular cadmium, from an aqueous phosphoric acid containing composition, using an organothiophosphorous heavy metal precipitating agent to said composition, wherein the reaction between the heavy metals, in particular cadmium, and the organothiophosphorous precipitating agent is performed at a pH ranging between 1.6 and 2.0 measured after a 13-fold dilution by volume. Advantageously, an ionic polymer, particularly a cationic and / or an anionic poly(meth)acrylamide copolymer may be used to promote heavy metal precipitation and / or to facilitate the removal of the precipitates from the composition. More in particular, the phosphoric acid containing composition is obtained by the acid digestion of phosphate rock, preferably by nitric acid, sulfuric acid, or a combination thereof.

Improved methods for the removal of heavy metals, in particular cadmium, from an aqueous phosphoric acid containing composition, wherein an organothiophosphorous heavy metal precipitating agent and an ionic polymeric surfactant, particularly a cationic polyacrylamide copolymer surfactant, are both added to a phosphoric acid containing composition, particularly under vigorous mixing conditions, such as between 500 and 700 rpm. The ionic polymeric surfactant promotes the precipitation of the heavy metals. More in particular, the phosphoric acid containing composition is obtained by the acid digestion of phosphate rock, preferably by nitric acid, sulfuric acid, or a combination thereof.

The application discloses application of phosphonated starch in selective flocculation desliming of fine-grained niobium ore, and a structural formula of the phosphonated starch is composed of a phosphonate group and a polysaccharide group of starch, the polysaccharide group is a high molecular chain formed by connecting multiple six-carbon sugar units through a glycosidic bond, and the phosphonate group is used for chelating with Nb 5+ A chelation reaction occurs, the polysaccharide group high molecular chain produces flocculation, and fine-grained gangue minerals are removed by selective flocculation. The phosphonate group of the phosphonated starch in the application chelates with exposed niobium ions on the surface of niobium minerals, so that the phosphonated starch is selectively adsorbed on the surface of the niobium minerals, the polysaccharide high molecular chain plays a bridging and sweeping role, fine-grained gangue slimes can be significantly removed by the method of selective flocculation desliming, the grade of Nb2O5 is improved, and the method has important significance for efficient recycling of fine-grained niobium ore.

There is provided a coagulation treatment device configured to perform chemical injection control based on a coagulation state monitoring sensor, the coagulation treatment device being capable of accurately controlling the addition amount of a coagulant with the color and amount of particles taken into consideration. A coagulant is added to a coagulation tank 3 by a chemical injection device 4. A detection signal from a coagulation state monitoring sensor 10 provided at a coagulation device 3 is input to a controller 8 and the chemical injection device 4 is controlled. The coagulation state monitoring sensor 10 includes a light emitting unit configured to emit a laser beam toward coagulation treatment solution, and a light receiving unit having a light reception optical axis orthogonal to a light emission optical axis of the light emitting unit. A light reception signal intensity change range is corrected by using light reception signal intensity, and a floc formation state is determined based on a corrected value of the light reception signal intensity change range.