1242 results about "Coarse particle" patented technology

The invention discloses a reaction-sintered silicon carbide setter plate and a preparation method thereof. The reaction-sintered silicon carbide setter plate product is obtained through powder granulation, compaction and reaction sintering. Wherein the silicon carbide powder of the four particle size sections is matched, the particle size sections are uniform, stacking is more reasonable, coarse particles form a frame, fine particles are filled among the coarse particles, the powder structure is compact in property, and the compactness of a green body obtained after blank pressing is guaranteed; and spray granulation is performed after ball milling, so that all the raw materials and auxiliary materials are uniformly mixed. The surface of the green body pressed by a set oil pressure mold is also provided with a concave-convex structure, so that the contact area between the load bearing plate and the bottom of the domestic porcelain is reduced, air circulation between the load bearing plate and the bottom of the domestic porcelain is increased, and adhesion is effectively avoided. The product has the advantages of long service life, high strength and fast heat conduction, solves the problems of low strength, low heat conductivity and short service life of mullite, and also solves the industrial pain point of adhesion of a reaction-sintered silicon carbide setter plate.

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 discloses a method for forecasting dynamic characteristic values of coarse particle solid-liquid two-phase flow in a vertical lifting pipeline, and belongs to the technical field of flow dynamic characteristic value forecasting. In order to solve the problem that the influence of particle motion on surrounding fluid is not considered in the theoretical calculation and numerical simulation of the solid-liquid two-phase flow in the pipe at present, the method comprises the following steps: firstly, carrying out modeling and grid division on a fluid domain; establishing a particle model based on particle material simulation software, and performing discrete control on particles; then based on computational fluid dynamics software, a coupling interface is established through a coupling interface control equation, the computational fluid dynamics software calculates and monitors the state of fluid, the state serves as an external environment of particles and is conveyed to particle material simulation software, and interference caused by movement of the particles is also transmitted to the computational fluid dynamics software through the coupling interface; and based on the initialized coupling interface, the pipeline model and the particle model, realizing coarse particle solid-liquid two-phase flow dynamic characteristic numerical prediction.

The invention discloses an intelligent fluidized bed jet mill, and relates to the technical field of material crushing and grading equipment. The equipment comprises a hardware part and a control module, wherein the hardware part consists of a crushing area, a feeding area and a grading area. Low-temperature and high-pressure nozzles uniformly distributed on an annular gas distribution disc are adopted in the crushing area; the grading area is provided with a flow dividing cylinder and a conical flow guide plate for separating ascending airflow and falling coarse particles; the control module collects particle size data of powder in real time, predicts future particle size distribution in combination with an LSTM network, dynamically optimizes the rotating speed of a grading impeller through a particle swarm algorithm, and achieves cooperative control over smashing efficiency, particle size precision and energy consumption with the effective output per unit energy consumption as the optimization target. Through low-temperature embrittlement, an anti-pollution structure and an intelligent algorithm, the problems that traditional equipment is high in energy consumption, extensive in particle size control and prone to contaminating materials are solved, and the device is suitable for fine smashing of high-purity or high-hardness materials.

The invention relates to the technical field of chemical raw material processing, and discloses a petroleum coke particle size grading and batching system which comprises a raw material pretreatment module, a multi-stage dynamic screening module, a particle size real-time monitoring module, an intelligent batching decision module and a closed-loop control execution module. The classification definiteness of materials with different particle sizes is ensured; meanwhile, through a particle size monitoring feedback mechanism, the particle size distribution abnormal state in the screening process is recognized in real time, the material purity within the target particle size range is guaranteed, the particle size grading accuracy is improved, a closed-loop matching decision module is arranged, particle matching weight parameters are dynamically optimized in combination with the electrolytic aluminum process requirement, and the particle size grading accuracy is improved. The deviation degree between the ingredient proportion and the target performance can be judged in real time; the speed ratio of the conveying belt and the opening degree of the stock bin are automatically corrected through the executing mechanism, it is guaranteed that the mixing proportion of coarse particles, medium particles and fine particles is always in the optimal interval matched with electrolytic aluminum anode production, and the quality stability of anode carbon blocks is improved.

The invention provides a height optimization system for a trailing suction dredger-mounted energy dissipation device. The optimization system comprises a core parameter input module, a loading process simulation and prediction module, a loading efficiency analysis module, a design optimization output module and an automatic height adjustment module. In the construction process, the height of the energy dissipation device can be automatically and accurately adjusted in real time according to different soil texture and different slurry concentration requirements. The energy dissipation device cannot be too low to cause quick settling coarse particle sediment to block an outlet of the energy dissipation device, and cannot be too high to cause cabin entering water flow to disturb sediment to increase overflow loss of suspended sediment. By accurately controlling the height of the energy dissipation device, the construction efficiency of the trailing suction dredger is improved, meanwhile, the adverse effect of loading overflow on the construction water area environment can be reduced, and the engineering application value is achieved. The height of the energy dissipation device can be automatically and flexibly adjusted, and the loading efficiency and the loading flatness of silt in the cabin are improved by reducing overflow loss.

The utility model discloses a waste asphalt pavement material separation and regeneration system which comprises a feeding device used for loading waste asphalt pavement materials and screening the waste asphalt pavement materials with different particle sizes so as to realize split-diameter output; the granulating device is connected with the feeding device so as to crush the waste asphalt pavement materials output in a split-diameter manner into the waste asphalt pavement materials with specified specifications; and the separating device is connected with the granulating device so as to separate stones from asphalt from the crushed waste asphalt pavement materials, or the separating device can further comprise a fine screening device which is connected with the separating device so as to screen and obtain fine materials meeting the particle size requirement. The system disclosed by the utility model can complete separation or fine screening of the waste asphalt pavement material doped with super-large particle size and caking at one time (without material returning), and remove an asphalt film with coarse particle size, so that 90% of asphalt in the waste asphalt pavement material is a finished product material with the grade of 0-3mm, the mixing amount of plant-mixed hot-recycling RAP can reach 100%, and the mixing amount of the plant-mixed hot-recycling RAP can reach 100%. And the device can be used for road conditions such as upper, middle and lower surface layers of expressways or first-grade roads, so that the economic benefits and the social benefits are remarkably improved.

The invention discloses a lake eutrophication biological treatment system and a dynamic method based on multi-dimensional cooperative regulation and control. Exogenous pollution control, layered biological manipulation and artificial intelligence dynamic feedback are fused, and the method is particularly suitable for moderate eutrophication water bodies with nitrogen and phosphorus exogenous input not completely cut off. According to the gradient filling structure, macromolecular organic matters are intercepted by using shallow coarse particles, and middle / fine particles specially attack phosphate adsorption, so that graded removal of pollutants is realized; fish ingestion and benthic organism disturbance have a synergistic effect, secondary pollution of aquatic plant litter degradation to a water body is reduced, transfer of nitrogen and phosphorus from the water body and plant litters to animal objects is promoted, and the coupled system can reduce the phosphorus release rate of bottom mud, improve the stability of FePO4 precipitation and synchronously degrade sulfides and organic matters in the bottom mud; electric shock damage to benthic organisms is avoided through the micro-current intensity, sulfur metabolites can be used as a nutrient source of submerged plants, and biological self-purification and resource utilization of eutrophic water are achieved.

The invention discloses a sulfur foam combined treatment device and a treatment method thereof, and relates to the technical field of sulfur foam treatment. Comprising a bottom plate, a pair of side plates are fixedly arranged on the two sides of the top face of the bottom plate, a hollow roller is rotationally clamped between the side plates, a center shaft is arranged in the middle of the interior of the hollow roller, and the right side of the center shaft is sequentially and slidably sleeved with a coarse particle filtering disc, a medium particle filtering disc and a fine particle filtering disc; a plurality of groups of first stirring paddles are fixedly arranged on the left side of the fixed sliding shaft, and the right side of the fixed sliding shaft rotationally penetrates through the coarse particle filtering disc, the medium particle filtering disc and the fine particle filtering disc in sequence. In the stirring process, components in sulfur foam are uniform, sulfur particles are fully dispersed, and agglomeration is prevented; during filtering, sulfur particles can be more effectively separated from impurities; after stirring and filtering, the purity of the sulfur product is remarkably improved, and the stability of the quality of the sulfur product is ensured by uniform stirring and fine filtering.

The invention discloses a system and device for real-time on-line detection of separation coarse particles of a coal preparation plant, and the system comprises a rack, and also comprises a flattening assembly used for avoiding mutual stacking of coal briquettes; the anti-stacking assembly is used for layering the coal briquettes; the flattening assembly comprises a lead screw, a sliding sleeve, a connecting plate, a guide rod and a sliding block, the lead screw is rotationally connected with the rack, the sliding sleeve is in threaded connection with the lead screw, the sliding sleeve is in sliding connection with the rack, the connecting plate is fixedly connected with the sliding sleeve, the guide rod is fixedly connected with the connecting plate, the sliding block is in sliding connection with the guide rod, and the sliding block is in sliding connection with the guide rod. A pressing cylinder is rotationally connected to the sliding block and used for rolling on coal briquettes, and the screen is connected with a transmission assembly; according to the invention, the precision of rough recognition can be effectively improved.

The invention relates to the technical field of zinc powder processing equipment, in particular to a multi-stage grinding system for preparing high-purity zinc powder, which comprises a primary grinding unit, a secondary grinding unit, a tertiary fine grinding unit, a separating and screening unit, a collecting unit, a cooling system and a control system, crushing larger zinc particles into a preset coarse particle size; and the secondary grinding unit is a ball mill and is used for further grinding the zinc powder subjected to primary grinding to ensure that particles reach a medium particle size range. According to the multi-stage grinding system, through automation, multi-stage smashing and real-time feedback control, efficient production of zinc powder is achieved, and it is guaranteed that the particle size of the zinc powder is uniform, and the purity of the zinc powder is high. A system integrated cooling mechanism prevents oxidation, a separation screening unit improves screening efficiency, and a sealed conveying device ensures environmental protection and safety. Overall automation improves production efficiency and is suitable for large-scale industrial application.

The invention relates to the technical field of metro platform screen doors, in particular to a novel particulate matter-preventing energy-saving metro platform screen door with an adjustable tuyere, which comprises a metro platform, and a plurality of left-side perforated platform screen doors and right-side perforated platform screen doors are fixedly mounted on two sides of the metro platform respectively; a rotating mechanism is movably connected to one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side, an automatic control system is fixedly connected to one side of one shielding door with holes in the left side, and a left tunnel and a right tunnel are correspondingly arranged on one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side. The automatic control system adjusts the angle of the rotary baffle and closes the holes in the shielding doors on the two sides through a control circuit, on one hand, the filter screen can filter out coarse particles, on the other hand, the shielding doors can block fine particles such as PM2.5, and therefore dispersion of the particles in the tunnel into the platform is reduced, and in summer, due to the fact that the holes of the shielding doors are closed, the shielding doors can not be blocked. The loss of cold air in the platform into the tunnel is reduced, and energy is saved.

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 invention relates to a coarse particle fluidized bed column separation kinetic analysis device and method, belongs to the technical field of mineral processing and resource recovery, and solves the problem that fluidized bed column separation kinetic analysis is difficult to systematically develop. The device comprises a fluidized bed column, a filling medium, a slurry supply unit, a water supply unit and a gas supply unit, the fluidized bed column comprises a barrel body, the filling medium is arranged in the barrel body, the volume of the filling medium is reduced from bottom to top in a layered mode, the slurry supply unit comprises a slurry mixing barrel and a first conveying pipeline, and the first conveying pipeline is communicated with the slurry mixing barrel and the top of the barrel body; and the water supply unit is communicated with the air supply unit and then communicated with the lower part of the barrel body. According to the invention, the multi-element and multi-scale filling medium is adopted to disperse fluid and assist fluidization, and is limited between the two screens, so that the use amount of clear water and materials is reduced, a fluidized bed column separation dynamic test is optimized from the aspect of structure, the follow-up wastewater treatment amount of coarse grain mineral fluidized bed column separation of an actual separation plant is reduced, and the production cost is reduced. And the production cost of a selection plant is saved.

The utility model relates to the technical field of dust treatment equipment, and discloses a dust removal equipment based on iron ore dressing processing, including: a base plate, a support column No. 1 is fixedly connected to the right side of the upper surface of the base plate; a dust removal mechanism, and the dust removal mechanism is arranged above the base plate. The utility model sets a primary treatment box, a filter screen, an air valve, an air guide pipe and a secondary treatment box. When the fan is running, the fan will extract dust-containing gas from the outside through the air inlet and allow these gases to enter the interior of the primary treatment box through the air outlet. When the dust-containing gas passes through the filter screen, the coarse dust particles in the gas will be blocked by the filter screen on the right side of the primary treatment box and fall into the dust storage box. When the gas enters the interior of the secondary treatment box through the air guide pipe, the fine dust particles in the gas will mix with water to form a suspension, which enhances the overall treatment effect of the base plate on fine particle pollutants and improves the overall dust removal effect of the base plate.

Even when used for polishing a semiconductor wafer provided with a silicon nitride film, there is provided sulfonic acid-modified colloidal silica capable of forming a highly flat polished surface at high speed. Sulfonic acid-modified colloidal silica, wherein the sulfur content of the silica particles is 700 mass ppm or more and less than 3000 mass ppm per 1 g of the silica particles, the sulfur content in the solvent is 250 mass ppm or less per 1 g of the solvent, and the content of coarse particles having a particle size of 0.2 μm or more contained in the silica particles is 10,000,000 particles / mL or less when the silica particle concentration is 1 mass%.

The invention relates to the technical field of boron carbide coarse abrasive particle crushing, in particular to a self-adaptive target type airflow crusher for boron carbide coarse abrasive particles, which comprises an air compressor, a Laval nozzle, a feed distributor, a crusher, a target material, a cyclone collector, a dust remover, an image acquisition assembly, an analysis assembly and a regulation and control assembly, the analysis assembly determines the accumulation degree of the coarse-particle boron carbide powder according to the powder distribution image so as to adjust the vibration feeding frequency of the feeding distributor, and determines the coarse-particle ratio and the coarse-particle duration according to the powder particle size image and the coarse-particle threshold value; and the regulation and control assembly adjusts the air pressure of the high-pressure airflow according to the coarseness ratio, the preset first ratio, the coarseness duration time, the preset time threshold value and the target granularity, and adjusts the angle of the target material or the air outlet angle of the Laval nozzle according to the position of the impact area, the ratio of the impact area and the preset second ratio. According to the method, the qualified rate of crushing of the boron carbide coarse abrasive particles is effectively improved.

A thermal-conductive silicone composition containing: (A) a hydrolysable organopolysiloxane having an alkoxysilyl group; and (B) aluminum nitride particles having an average particle size of 0.5 μm or more and 2.0 μm or less and contained in an amount of 50 to 70 volume %. A content of coarse particles in the aluminum nitride particles is 1.0 volume % or less relative to the entire aluminum nitride particles, the coarse particles having particle sizes of 10 μm or more according to a particle size distribution measurement method by laser diffraction. The thermal-conductive silicone composition has a heat conductivity of 1.3 W / mK or more according to a hot disc method. The present invention provides: a thermal-conductive silicone composition having high heat conductivity and being compressible to 10 μm or less; and a production method of the thermal-conductive silicone composition.

The invention discloses a high-temperature-resistant and corrosion-resistant smelting furnace lining material which is prepared from the following raw materials in percentage by weight: 55-60% of fused magnesite coarse particles, 30-35% of fused magnesite fine particles, 2-3% of crystalline flake graphite, 0.5-0.9% of nano carbon black, 1-2% of phenolic resin doped with transition metal elements and 1-3% of Al2O3-SiC powder, the transition metal element comprises at least one of Ti, Co, Ni, Fe or Cr. The performance of the smelting furnace lining material is superior to that of a furnace lining material which singly adopts crystalline flake graphite as a carbon source, the corrosion resistance and permeability of the smelting furnace lining material to oxidizing slag can be improved, and the oxidation resistance of the smelting furnace lining material is also improved to a certain extent.

The invention relates to the technical field of ore particle screening, and discloses high-recovery-rate micro-fine-particle magnetite ore dressing equipment which comprises a mounting frame, a protective shell is fixedly mounted on the mounting frame, a screening assembly is arranged on the protective shell, and the screening assembly comprises a three-way pipe. In order to enable the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment to be suitable for efficient separation of high-added-value micro-fine-particle iron ore, the screening assembly is arranged, the screening assembly is matched with a power motor to drive a large belt wheel through a small belt wheel and a transmission belt, an output shaft drives an auger rod to push ore in a three-way pipe, feeding blockage is avoided, and the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment is suitable for efficient separation of high-added-value micro-fine-particle iron ore. And meanwhile, a centrifugal motor drives a trilateral frame to drive a centrifugal screen drum to rotate at a high speed, fine particles fall into a discharging hopper through screen holes by utilizing centrifugal force, and coarse particles are discharged from a first discharging pipe through a mounting drum. And the stirring paddle rotates synchronously to prevent the fine particles from accumulating in the funnel.

The invention discloses a method for preparing a low-clinker composite mortar material from granite weathered construction engineering residue soil and mortar. The method comprises the following steps: settling and screening engineering residue soil, and respectively carrying out biomimetic mineralization modification, particle size allocation and proportioning on powdery clayey soil and coarse particles to form mixed mortar; according to the mixed mortar, granite weathering type constructional engineering muck solid waste can be fully utilized, the recycling rate reaches 96%, the performance of the mortar is improved by introducing a biomimetic mineralization modification technology, conditions are mild, no harmful by-products exist, and the mechanical performance of the composite mortar is excellent. Through a biomimetic mineralization modification technology, after the prepared mortar is cured for 28 days, the highest compressive strength can reach 65.45 MPa, and the compressive strength is superior to that of traditional OPC mortar, fly ash composite mortar and untreated muck mortar.

The invention relates to the technical field of lead-zinc ore beneficiation, in particular to a lead-zinc ore dense medium grading selection-flotation combined separation system and a separation process, and the system comprises a dense medium separation system and a flotation system. The dense medium separation system comprises a crushing and screening unit, a dense medium coarse fraction separation unit, a dense medium fine fraction separation unit and a fine ore water treatment unit, an outlet of the crushing and screening unit is divided into a coarse fraction outlet, a fine fraction outlet and a fine ore outlet, the coarse fraction outlet is connected with the dense medium coarse fraction separation unit, and the fine fraction outlet is connected with the fine ore water treatment unit; the fine fraction outlet is connected with the dense medium fine fraction separation system, the fine ore outlet is connected with the fine ore water treatment unit, and a coarse fraction gravity concentration concentrate outlet of the dense medium coarse fraction separation unit, a fine fraction gravity concentration concentrate outlet of the dense medium fine fraction separation unit and a concentrated fine ore outlet of the fine ore water treatment unit are connected with the flotation system. The method has the advantages of high economic benefit, low production cost, energy conservation, environment friendliness and the like, and the lead-zinc ore dressing efficiency and the metal recovery rate are effectively improved.

The invention discloses a grading grinding vertical mill and a using method thereof, and relates to the technical field of vertical mills.The grading grinding vertical mill comprises a mill shell, a millstone grading rotor and an eddy current restraining flow guide cover assembly, the grading rotor is fixedly installed on the upper portion of the inner wall of the mill shell, and a millstone is fixed below the grading rotor; and a vortex suppression flow guide cover assembly is fixedly mounted on the inner wall of the mill shell and located on the periphery of the grading rotor, and the vortex suppression flow guide cover assembly is used for guiding airflow to uniformly and stably flow to a blade area of the grading rotor. According to the invention, the eddy current suppression flow guide cover assembly is mounted, so that active suppression of three-dimensional turbulence in a classification area is realized, the problems of over-grinding of fine powder and running of coarse particles caused by airflow turbulence induced by a high-speed rotor are solved, the classification precision is improved, and the classification power consumption is reduced.

The invention discloses a smelting method for directly recycling 120-ton converter dry dedusting coarse particles to a converter. The method comprises the following steps: after slag splashing of steel on a converter is finished, shaking the converter to 90-120 degrees for slag spreading operation, and simultaneously reducing the air speed of a primary dust removal fan of the converter to be below 700 revolutions per minute; the converter is shaken to the temperature of 45-55 DEG C, 15-25 tons of waste steel is added, after the waste steel is added, the converter is shaken to the zero position, and 500-1000 kg of converter dry dedusting coarse particles are added; the wind speed of the dust removal fan is increased to gt; the rotation speed is 1400 r / min; shaking the converter to the tapping surface to-20 DEG C to-40 DEG C, and spreading out the dry dedusting coarse particles of the converter again; and the converter is shaken to 40-50 DEG C, 105-115 tons of molten iron is added, and after iron adding is completed, the converter is shaken to the zero position, and then blowing is started. The method effectively solves the technical problem of foam splashing in the earlier stage of converter smelting caused by direct recycling of the converter dry dedusting coarse particles, can meet the steel grade process requirements, can reduce cost, improve efficiency, save energy, reduce consumption and reduce waste emission, and has good popularization and application values.

The invention discloses a continuous multi-stage narrow-granularity-section micron particle and coarse particulate matter grading screening device and a continuous multi-stage narrow-granularity-section micron particle and coarse particulate matter grading screening method. The device is formed by connecting a rotational flow grading module, a purification liquid supplementing module and a filtering concentration module in series, the rotational flow grading module and the purification liquid supplementing module are respectively formed by connecting n hydrocyclones with the same structure and different specifications in parallel, the hydrocyclones of the two modules are in one-to-one correspondence, every two hydrocyclones are connected in series to form a hydrocyclone group, then the n hydrocyclone groups are connected in parallel, and n is equal to the number of target particle size sections minus 1. And through a series-parallel connection structure of the multi-stage cyclone, precise stepless regulation and control and circulating purification of size grading are realized. After being stirred, a solid-liquid mixture is sequentially graded and purified by a cyclone group, and then is concentrated by a cloth bag filter of the filtering and concentrating module. The device is automatically controlled through a PLC, can realize high-precision and high-efficiency grading of micron and coarse particles in a narrow particle size section, and has the advantages of high separation precision, energy conservation, high applicability and the like.

The invention relates to a tailing scavenging cylinder, which belongs to the technical field of mineral separation and comprises an upper cylinder body, an inverted cone and a lower cylinder body, the upper end of the inverted cone is fixedly connected with the upper cylinder; an overflow groove is formed in the periphery of the upper cylinder body; an accommodating space is formed in the upper cylinder body, the inverted cone and the lower cylinder body; a middling collector is arranged in the accommodating space; a middling concentration hopper is arranged on the periphery of the lower barrel; an overflow weir is arranged at the uppermost end of the upper cylinder body; the lowermost end of the lower barrel is connected with an inner barrel of the mineral processing equipment and is used for receiving coarse tailings generated by the inner barrel; coarse-particle intergrowth minerals in the coarse tailings and part of entrained fine-particle concentrates are settled and recycled through the middling collector, then enter the middling concentration hopper and are concentrated through the middling concentration hopper to become middlings to be discharged, and the rest qualified tailings cross the overflow weir, leave the tailings scavenging barrel, enter the overflow groove and are discharged. The method solves the contradiction that traditional ore dressing equipment is used for obtaining high-grade concentrate products and reducing the product recovery rate.

The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps: a) subjecting UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction; b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles; c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one washing step; d) optionally subjecting the fine screened UBC fiber fraction to a washing method to remove further contaminants; e) optionally subjecting the fine screened UBC fiber fraction to a bleaching method; f) subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least wt %; and g) subjecting the dewatered UBC fiber fraction to deactivation to obtain a purified 20 UBC fiber fraction.

The bypass ventilation system comprises an air taking opening formed in a smoke chamber, a quench cooler, a cyclone dust collector, a bag dust collector, an ash bin and a pneumatic conveying device. The quench cooler adopts a volute structure, and an air inlet port of the quench cooler is connected with a quench fan; high-temperature flue gas passing through the quench cooler enters the cyclone dust collector, coarse particles in the flue gas are returned to the decomposing furnace by the cyclone dust collector, and relatively coarse particles are returned to the kiln tail, so that partial material consumption and heat consumption are reduced; fine particle dust separated by the cyclone dust collector enters a cloth bag dust collector to be collected, and clean air is directly discharged into a kiln tail chimney through an exhaust fan; ash collected in the cloth bag dust collector is firstly conveyed into the ash bin, and then the ash is conveyed to the steel bin at the clinker conveying belt or conveyed to the ash temporary storage bin of the water washing workshop and then is subjected to water washing. According to the bypass ventilation system, the skinning problem can be effectively relieved, and stable operation of a production line is guaranteed; and the quality of the cement is ensured.

The invention discloses an extraction method and application of purslane exosomes, belongs to the technical field of plant exosome extraction, and can improve the structural integrity, yield and purity of the purslane exosomes. Comprising the following steps: (1) cutting a weighed purslane sample into pieces, adding 90-120ml of a PBS buffer solution, and soaking overnight to obtain a soaking solution; (2) adding a proper amount of PBS (Phosphate Buffer Solution) into the soak solution, and then carrying out high-speed homogenization treatment for 8-10 times to obtain homogenate; (3) filtering large fragments in the homogenate to obtain a first supernatant; (4) sequentially carrying out gradient centrifugal treatment: centrifuging 1000g for 10 minutes to remove coarse particles, centrifuging 2000g for 20 minutes to remove cell debris, centrifuging 4000 g for 30 minutes to remove large-particle vesicles, and centrifuging 10000g for 60 minutes to remove impurities; (5) filtering the supernate obtained in the step (4) by using a sterile 0.22 mu m filter, and carrying out 120000g ultracentrifugation for 70min to obtain a precipitate; and (6) resuspending the precipitate by using a sterile PBS buffer solution to obtain a purslane exosome suspension.