45results about "Differential sedimentation" patented technology

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.

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 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 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 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.

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.

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.

The invention relates to a method and an apparatus for separating lignocellulose particle fraction (3) and lignin particle fraction (4), in which crude lignin (1) formed from starting material (6) comprises lignocellulose particles and lignin particles. According to the invention, the method comprises adding stabilizing chemical (11) and / or hydrophobic chemical (12) into the crude lignin (1) in at least one step, and treating the crude lignin by separating the lignin particle fraction (4) and lignocellulose particle fraction (3) from each other in at least one separation step (2,8,9,10). Further, the invention relates to a lignocellulose particle fraction and a lignin particle fraction and their uses.

A method (10) for material-specific fiber separation in textile recycling comprises the following steps: i) providing a fiber mixture with fibers from different fiber materials as a suspension (S18), ii) adding an additive to the suspension, and iii) separating fibers of one fiber material from the remaining fiber mixture by flotation. According to the invention, step iii) comprises step iii-a) (S30) of separating first fibers from a first fiber material from the remaining fiber mixture by flotation and step iii-b) (S36) of separating second fibers from a second fiber material from the remaining fiber mixture by flotation.wherein step ii) prior to step iii-a) comprises step ii-a) (S28) of adding a first additive to the suspension to modify the flotation behavior of the first fiber material and prior to step iii-b) comprises step ii-b) (S34) of adding a second additive to the suspension to modify the flotation behavior of the second fiber material, wherein the first and the second additive differ at least in their respective physical principles of action which underlie an interaction of the respective additive with the respective fiber material that modifies the flotation behavior of the respective fiber material.

This application provides a precision blasting-based integrated underground mining and beneficiation process, belonging to the field of underground mining. The process includes the following steps: obtaining the borehole spacing and charge length based on the ore particle size distribution after blasting in existing blasting tests; employing a composite charge structure of "bottom explosive layer - middle air layer - orifice water bag sealing layer"; then, progressively blasting from the central borehole to auxiliary boreholes and then to the peripheral boreholes; beneficiating the blasted ore using a fully integrated small-scale beneficiation plant process established underground, encompassing "screening - photoelectric separation - fine crushing - grinding - flotation," and filling the goaf with the tailings obtained from the beneficiation. This application utilizes the synergy between blasting parameters and charge parameters, employs a composite charge structure, and optimizes the detonation sequence to obtain ore with the required particle size, providing favorable conditions for underground beneficiation, and directly filling the goaf with tailings, reducing ore transportation costs.

A system for treating wastewater comprising a coagulation-flocculation assembly having a raw wastewater inlet and a coagulated-flocculated wastewater outlet; and a slurry separator comprising an intake area configured for receiving wastewater slurry from the coagulated-flocculated wastewater outlet, a liquid outlet, a sludge outlet, and a filtration module configured to facilitate percolating of liquid therethrough and forming of a filter cake thereon. The slurry separator being configured to receive slurry at the intake area, separate the slurry to liquid and sludge by the filtration module, remove the liquid via the liquid outlet, and convey the sludge from the intake area to the sludge outlet. The system further comprises a level maintaining arrangement configured to maintain at least a minimal level of the filter cake.

The application discloses application of a hydroxamic acid modified starch-metal ion flocculant in tin stone flotation, and the flocculant has the following structural formula: wherein n is an integer of 500-1000, and Me is Cu 2+ , Zn 2+ , Fe 3+ , Fe 2+ , Pb 2+ , Al 3+ , Mg 2+ or Ca 2+ . The hydroxamic acid modified starch-metal ion complex used in the application has a strong selective flocculation effect on tin stone with a particle size less than 38 microns, and can effectively improve the floatability of the tin stone with a particle size less than 38 microns, wherein the formed complex has a strong chelation performance on tin stone and other oxides, so that the hydroxamic acid modified macromolecular starch realizes selective bridging of the tin stone with a fine particle size, realizes selective bridging and lengthening of tin stone particles, and greatly improves the flotation efficiency.

This invention discloses a serpentine inhibitor and its application in the flotation of copper and nickel in copper-nickel ore. The serpentine inhibitor is nanocellulose. The specific application includes the following steps: copper-nickel ore is ground using a ball mill, then adjusted into a slurry. Nanocellulose is added to the slurry and stirred. Subsequently, ethyl xanthate and No. 2 oil are added sequentially and stirred. After 1-2 roughing stages, 2-3 scavenging stages, and 2-3 cleaning stages, a copper-nickel concentrate is obtained. The serpentine inhibitor nanocellulose in this invention has a wide range of raw material sources, is environmentally friendly, contains no phosphorus, has a high copper-nickel metal recovery rate, and a low magnesium oxide content in the concentrate, enabling efficient enrichment of pyrite and chalcopyrite in copper-nickel ore.

A water treatment system comprises a source of water including one or more contaminants, an electrocoagulation cell including a housing defining a fluid flow conduit, an anode disposed within the fluid flow conduit, and a cathode disposed within the fluid flow conduit, the housing including an inlet fluidly connectable to the source of water and an outlet, a solids / liquid separation system having an inlet fluidly connectable to the outlet of the housing of the electrocoagulation cell, a solids-rich outlet, and a solids-lean outlet, and a ballast feed system configured to deliver a ballast to the solids / liquid separation system.

To provide a water-cleaning agent which has low contents of water-insoluble components and excellent water-cleaning performance and a method for producing the same, and an organic coagulant which can be used suitably for the water-cleaning agent and a method for producing the same.SOLUTION: The invention provides, e.g., an organic coagulant which contains a plant extract, and a water-cleaning agent which contains the organic coagulant and a polymer coagulant.SELECTED DRAWING: None

The present disclosure relates to a control system for concentrating a mineral concentrate, the control system comprising: a sensor configured to assist in determining a status of at least one of an overflow or an underflow associated with concentration of the mineral concentrate in a concentration station; and a controller configured to receive information from the sensor, where, in response to the controller identifying a predetermined state based on the information from the sensor, the controller is configured to control at least one flow influencing device to change a property of the underflow.

The disclosure provides a method for separating a black mass material into first and second constituent parts. The first constituent part comprises or consists of particles of a hydrophobic material and the second constituent part comprises or consists of particles of a hydrophilic material. The method comprises providing an emulsion. The emulsion comprises a first liquid phase dispersed as droplets in a second liquid phase, and the second liquid phase is or comprises water. The method further comprises contacting the emulsion with the black mass material to provide an emulsion-material mix and thereby allowing the particles of the hydrophobic material to be adsorbed into or onto the droplets of the first liquid phase, and the particles of the hydrophilic material to remain in the second liquid phase. The method further comprises separating the particles of the hydrophobic material and the particles of the hydrophilic material to thereby separate the first and second constituent parts of the black mass material. 15