75results 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.

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 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.

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.

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.

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 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.

The present invention provides an apparatus for treating fluorine-containing wastewater, said apparatus comprising: a first flocculation treatment means for subjecting fluorine-containing wastewater to a flocculation treatment with an inorganic flocculant and a calcium compound; a first precipitation treatment means for subjecting a flocculation reaction liquid from the first flocculation treatment means to precipitation and separation; a second flocculation treatment means for carrying out a flocculation treatment by adding an inorganic flocculant to at least a portion of treated water from the first precipitation treatment means; a clarification membrane device for subjecting a flocculation reaction liquid from the second flocculation treatment means to membrane separation treatment; a reverse osmosis membrane device for separating membrane permeate supplied from the clarification membrane device into permeate and concentrate; a means for taking out the permeate from the reverse osmosis membrane device; a third flocculation treatment means, installed separately from the first flocculation treatment means, for subjecting the concentrate from the reverse osmosis membrane device to a flocculation treatment with an inorganic flocculant; and a second precipitation treatment means for subjecting a flocculation reaction liquid from the third flocculation treatment means to precipitation and separation.

A detection method and a detection device (10). The detection method is used for detecting fibers (30) in a graphite powder. The detection method comprises: mixing a preset mass of a graphite powder and a preset volume of an aqueous solution of a separating agent, so as to form a slurry (40), such that fibers (30) and graphite particles (20) in the graphite powder are arranged in layers, with the fibers (30) being located at the top layer (41) of the slurry (40), and the graphite particles (20) being located at the bottom layer (42) of the slurry (40), wherein the density of the aqueous solution of a separating agent is less than the density of the graphite particles (20) and is greater than the density of the fibers (30); separating out the top layer (41) of the slurry (40); and obtaining the number of fibers in the top layer (41) of the slurry (40).

The application provides a tailing water treatment process, (1) crushing the tailings and screening out the mineral powder meeting the particle size requirement; (2) adding the mineral powder and water into a homogenizing tank according to the proportion adjusted, and the slag is settled at the bottom; (3) the mixed solution is sent into a membrane tank, the solution is washed and filtered through a filtering system, the filtered slag is settled at the bottom of the membrane tank, and the produced solution is discharged to a temporary storage tank; (4) the slag at the bottom of the homogenizing tank and the membrane tank is discharged to a filter press through a concentration discharging system, the slag is filtered through the filter press, the filtered solution is discharged to the homogenizing tank for repeated use, and the filtered slag is discharged and collected; (5) the concentration of the solution collected in the temporary storage tank is monitored by the system, if the concentration does not reach the standard, the solution is discharged back to the homogenizing tank and new mineral powder is added for mixing, and the steps (2) to (4) are repeated until the concentration of the solution in the temporary storage tank reaches the standard, then the solution in the temporary storage tank is discharged to a storage tank for collection, and the design has the advantages of low cost and good environmental protection effect.

The application discloses a kind of magnetite concentrate purification methods, belong to magnetite concentrate extreme purification technical field.The purification method is to carry out superfine grinding after magnetite concentrate raw materials are added alkali metal hexametaphosphate and alkali metal silicate and flocculation desliming, obtain preliminary purification magnetite, again to the ore pulp containing preliminary purification magnetite is added magnetite inhibitor, composite collector and activator and carries out reverse flotation, namely, wherein, the composite collector includes fatty amine and zwitterionic surfactant, and the activator includes calcium compound and rare earth compound.The application greatly improves the separation and removal effect of gangue mineral and impurity metal element by flocculation desliming and specific flotation reagent system, improves the grade of magnetite concentrate while improving the yield and recovery rate of high-purity magnetite concentrate, the method is simple, low in cost, small in dosage of reagent in flotation process, green and environmentally friendly, suitable for industrial application.

An industrialized process for recovering fine heavy minerals such as gold from particulate ore includes guiding a liquid slurry over an inclined surface with components thereon such as blankets, corduroy, carpet, canvas, magnetic mats, ribbed rubber mats, fine carpets, or like material which collect the heavier material and in a cleaning cycle releasing the trapped particles for collection by applying sequentially water jets from a plurality of water spray nozzles. Continuous operation can be obtained by installing surfaces in parallel, with an automated valve arrangement to divert feed away from a selected one of the surfaces when in the cleaning cycle. The surfaces are stacked one on top of another to increase feed capacity where the feed supply is arranged to feed to all stacked surfaces as a common supply and wherein the feed, water spray, concentrate, and tailings automated control valves are shared between the surfaces.

A method of treating wastewater comprising carbon nanotubes and N-methyl-2-pyrrolidone (NMP) includes introducing one or more settling agents into the wastewater to promote settling of solids from the wastewater and form a medicament-treated wastewater; separating the medically treated wastewater into a sludge having an increased carbon nanotube concentration compared to the medically treated wastewater and a supernatant having a reduced carbon nanotube concentration compared to the medically treated wastewater; separating the supernatant into a filtrate and a retentate, the retentate having a solids concentration higher than the solids concentration of the filtrate; and separating the filtrate into product water having a lower NMP concentration than the NMP concentration of the filtrate and a retentate having a higher NMP concentration than the NMP concentration of the filtrate.

The present disclosure provides a method for removing silicon powder in a coolant for monocrystalline silicon slicing with a diamond wire, including following steps: preparing an inorganic coagulation-inducing saline solution; mixing the inorganic coagulation-inducing saline solution with a waste coolant of the coolant after monocrystalline silicon slicing to obtain a mixture, and leaving the mixture to stand to carry out agglomeration and precipitation of the silicon powder. The inorganic coagulation-inducing saline solution has advantages of being inexpensive, non-toxic, easy to obtain, and achieving good agglomeration and precipitation. It is inexpensive to remove the silicon powder in the waste coolant for the monocrystalline silicon slicing with the diamond wire, and does not cause environmental pollution. The recovered silicon powder can be recycled and sold again, and the coolant can be reused for cutting after simple treatment.