882results about "Solid separation" patented technology

The invention discloses plastic gear waste recovery equipment, and belongs to the technical field of waste recovery, the plastic gear waste recovery equipment comprises a treatment box, the left side of the top of the treatment box is pivotally provided with a downward inclined guide plate, and the tail end of the guide plate extends to a crushing chamber inlet in the treatment box; an eccentric crushing roller is transversely arranged in the crushing chamber, rotating shafts at the two ends of the eccentric crushing roller penetrate through the side wall of the treatment box and are driven by an eccentric transmission mechanism to rotate, and the eccentric crushing roller is configured to extrude and crush plastic gears through eccentric movement; efficient separation of metal and plastic and granularity control of plastic fragments are achieved through cooperative extrusion and crushing of the eccentric crushing roller and the adjustable jaw plate assembly in combination with magnetic separation-airflow multi-stage separation and coaxial reverse cutting. The device has the advantages of high separation rate, high automation degree and uniform discharging, and is suitable for fine recovery of gears with complex structures.

The invention discloses a processing method for reducing the broken rice rate of commercial rice, which comprises the following steps: S1, an unhulled rice pretreatment stage: S1a, a multi-stage linkage impurity removal process is adopted, and large impurities, light impurities, metal impurities and stones in unhulled rice are removed through combination of classified screening, airflow separation, magnetic separation and specific gravity stone removal, so that the impurity removal rate is greater than or equal to 99%; s1b, on the basis of a dynamic adaptation model of rice physical characteristics and rice hulling parameters, rice moisture and hardness data are collected in real time through a first detection device, the rice hulling flow and the inter-roller pressure are calculated and adjusted through a control unit, and closed-loop control is achieved; s2, carrying out a color sorting and polishing stage; s3, carrying out a rice milling regulation and control stage; and S4, entering a vacuum packaging stage.

The invention discloses a method for asynchronously recovering copper and cobalt in sulfur-oxygen mixed copper-cobalt ore tailings through dressing and smelting combination. The sulfur-oxygen mixed copper-cobalt ore tailings are divided into a coarse fraction, a medium fraction and a fine fraction according to particle sizes; the coarse fraction is subjected to ore grinding and copper sulfide flotation, part of copper and cobalt are recycled, and coarse fraction tailings are obtained; the medium fraction is subjected to copper sulfide flotation, copper oxide flotation and magnetic separation, part of copper and cobalt are recycled, and medium fraction tailings are obtained; the fine fraction is subjected to magnetic separation, part of copper and cobalt are recycled, and fine fraction tailings are obtained; and neutralizing one or more than two of the coarse-fraction tailings, the medium-fraction tailings and the fine-fraction tailings to recover part of copper and cobalt. According to the characteristics of the sulfur-oxygen mixed copper-cobalt ore tailings, the sulfur-oxygen mixed copper-cobalt ore tailings are divided into different size fractions, and different grading processes are adopted for treatment. And efficient enrichment and recovery of copper minerals and cobalt minerals with different properties in the sulfur-oxygen mixed copper-cobalt ore tailings are realized through a multi-process combined grading process.

The invention discloses a fluoride-free flotation-microbiological leaching-multistage magnetic separation synergistic tailing purification process, which takes mine tailings as raw materials and is realized by the following steps: 1, fluoride-free flotation desliming and impurity removal: replacing hydrofluoric acid with a novel anion collector (fatty acid derivative), and preferentially removing mica and feldspar under the condition that the pH is 2.5-3.5; 2, removing iron and aluminum by microbiological leaching: leaching for 48 hours at the temperature of 35 DEG C by utilizing an acidophilus bacillus ferroxidans bacterial solution, and dissolving Fe2O3 and Al2O3 in a wrapped state; 3, high-gradient magnetic separation refining: removing magnetic minerals through 1.2 T strong magnetic separation, and then separating weak magnetic impurities through 0.8 T weak magnetic separation; the indexes of the final product are as follows: the purity of SiO2 is greater than or equal to 99.9%, the whiteness is greater than or equal to 94% (ISO standard), the content of Fe2O3 is less than or equal to 80ppm, Al2O3 is less than or equal to 1200ppm, and the requirements of electronic grade (IOTA-4 standard) quartz powder are met.

The system is formed by combining and connecting a coarse crusher (1), an ore washing sieve (2), a large dry magnetic separator (3), a wet magnetic separation preselector (4), a fine crusher (5), a dry magnetic separation scavenging machine (6), an aggregate screening machine (7), a preselected concentrate dewatering sieve (8), a preselected tailing dewatering sieve (9), a preselected concentrate concentration magnetic separator (10) and a preselected concentrate filter (11). An ore discharge port of the coarse crusher (1) is connected with a feeding end at the upper part of the ore washing sieve (2), an oversize discharge port of the ore washing sieve (2) is connected with a feeding belt of the large dry magnetic separator (3), and an undersize discharge port of the ore washing sieve (2) is connected with an ore feed port of the wet magnetic preselector (4). Slurry on the surface of high-silt-content raw ore is washed off through screening and ore washing operation, and the ore blocking condition is reduced; dry separation and wet separation processes are combined, a large number of tailings are thrown out in advance, meanwhile, various building material products are produced, and the resource utilization rate is increased.

The invention provides a coal dressing decision-making method and system based on offline and online data fusion, and relates to the technical field of coal washing and dressing processing. According to the method, firstly, a dynamic mapping relation between an offline basic data set and an online real-time data set in the coal dressing process is established; then, a collaborative constraint condition across data types is generated based on the relationship. And then a decision influence evaluation model of the coal dressing process parameters is constructed through the conditions. And generating a coal preparation process adjustment scheme according to a model output result. And finally, the scheme is sent to a coal dressing production control system to be executed, the dynamic mapping relation and the collaborative constraint conditions are optimized according to execution result data, and coal dressing decision optimization is achieved.

The invention relates to a strengthening treatment and automatic separation system for construction waste recycled aggregate, and innovatively provides a technical route of'multistage crushing, magnetic separation, winnowing, flotation linkage and aggregate strengthening 'aiming at the core problems of more impurities and low strength of the recycled aggregate. The system comprises a pretreatment module (for removing large impurities), a multi-stage crushing module (for controlling grain shapes), a linkage sorting module (for removing plastics through winnowing, removing wood chips through flotation and carrying out photoelectric precise sorting), an aggregate strengthening module (for improving strength through microwave activation and nanometer coating) and an intelligent control center. By establishing a magnetic separation efficiency model, a grain shape optimization model and a strength prediction algorithm, the aggregate purity is greater than 98% (XRF detection), and the compressive strength is improved by 40% (ISO 679 verification); the energy consumption in the sorting link is reduced by 30%, and the reinforced aggregate can replace natural aggregate to prepare C40 concrete. The bottleneck of high-value utilization of the construction waste is broken through, and circular economy development is promoted.

This invention proposes a method for screening vein quartz raw materials to prepare high-purity quartz sand with low gas-liquid inclusions. The screening method includes the following steps: selective crushing and dissociation—scrubbing and washing—dehydration and classification—atomized chemical application—surface modification—polishing and homogenization—machine vision-based sorting of coarse particles for pre-selection and tailing—screening of low-gas-liquid inclusion particles based on transparency differences—gradation and utilization of raw material particles of different grades. This invention achieves the screening of high-purity quartz raw materials with low gas-liquid inclusion content and the grading and utilization of high-purity quartz raw materials with different transparency levels by controlling the particle size, surface modification, and transparency optimization of quartz raw materials, and by sorting according to differences in particle transparency. This effectively reduces the contamination of high-gas-liquid inclusion impurities on high-quality quartz sand products after sand making.

This invention belongs to the field of photovoltaic recycling, specifically relating to a method for the comprehensive recycling of waste photovoltaic modules, comprising: disassembling waste photovoltaic panels to separate photovoltaic laminates, aluminum frames, and junction boxes; crushing the photovoltaic laminates to obtain photovoltaic crushed material; subjecting the photovoltaic crushed material to a decomposition reaction to break down the EVA adhesive into non-adhesive molecules; sorting the decomposition reaction-treated photovoltaic crushed material to separate glass, plastic backsheets, and copper powder to obtain a silicon powder mixture; dissolving the silicon powder mixture to obtain a silver-containing solution and silicon powder precipitate; separating the silicon powder precipitate and converting the silver-containing solution into elemental silver for recycling. This invention performs in-depth processing based on physical sorting, further purifying the silicon powder while obtaining valuable metallic silver, increasing economic benefits, reducing recycling costs, and achieving efficient and green recycling of photovoltaic modules.

The invention relates to the technical field of waste battery recycling, in particular to a battery module lossless disassembling method based on low-temperature brittleness difference, which comprises the following steps: step 1, analyzing material brittleness and formulating a gradient cooling program; 2, local directional cooling and embrittlement control, wherein a low-temperature cooling medium is adopted to conduct directional spraying on the adhesive concentration area, and meanwhile the temperature of the metal current collector is maintained to be higher than the embrittlement temperature of the metal current collector through heat insulation protection; temperature distribution is monitored in real time, cooling parameters are dynamically adjusted, and it is ensured that a target material is completely embrittled; step 3, vibration separation and layered recovery: applying low-frequency vibration to the embrittled battery module to break the embrittled material layer; and sorting materials based on fragment size and density difference, and recovering the complete metal current collector. By means of the steps, it is guaranteed that materials are not damaged in the disassembling process, and lossless disassembling and efficient recycling of the battery module are achieved through accurate control and the efficient sorting process.

The invention discloses a coal washing and selecting management and control method based on safety production, and aims to realize comprehensive monitoring and optimal management of a coal washing and selecting process. According to the method, key data such as production time, yield and inventory are collected in real time through an edge computing platform and multiple database technologies, and multi-dimensional data analysis is carried out through tools such as FineReport. The system further comprises a raw coal selectability analysis module, and the coal dressing process design is guided by generating float and sediment curves and the like. The technical inspection management module guarantees coal quality and production safety through multiple inspection means such as floating and sinking, medium quality, screening, medium carrying and the like. According to the invention, fine management of the coal washing process is realized, and the production efficiency and safety are effectively improved.

The invention relates to a method for preparing ultra-pure coal through combination of grinding and flotation. The method comprises the following steps: carrying out primary surface modification and flotation to remove most of gangue; fine silt on the surfaces of the coal particles is removed through scrubbing and ore grinding, and the hydrophobicity of the coal is improved by combining secondary surface modification and flotation; the coal quality is judged according to the ash content of secondary flotation clean coal, if the ash content is larger than 3%, dissociation ore grinding and grading are conducted, and it is guaranteed that coal and gangue are fully dissociated; double-emulsion surface modification is adopted to enhance the dispersibility of the agent, and finally, the ultra-pure coal with the ash content smaller than 1% is obtained through three-time flotation and four-time flotation. Through the synergistic effect of scrubbing ore grinding, dissociation ore grinding and multi-section flotation, the dissociation efficiency and flotation selectivity of coal and gangue are effectively improved, the method adapts to coal quality fluctuation, and the yield of ultra-pure coal is increased.

A system and process for sorting and recovery of recyclable materials, and in particular, sorting and recovery of recyclable materials from mixed waste comprising municipal solid waste in a materials recovery facility or “MRF” are provided. Advanced technology and machinery are integrated into a multi-step system and process that are designed to treat contaminated MSW streams to meet or exceed minimum material quality specifications while also reducing and minimizing headcount of sorter personnel. Because the mix of materials in MSW can be so varied and unpredictable, the system and process are designed to effectively sort and recover desired materials from MSW streams having a variety of material compositions.

A method for separating particles in a biofluid includes pretreating the biofluid by introducing an additive, flowing the pretreated biofluid through a microfluidic separation channel, and applying acoustic energy to the microfluidic separation channel. A system for microfluidic separation, capable of separating target particles from non-target particles in a biofluid includes at least one microfluidic separation channel, a source of biofluid, a source of additive, and at least one acoustic transducer coupled to the microfluidic separation channel. A kit for microfluidic particle separation includes a microfluidic separation channel connected to an acoustic transducer, a source of an additive, and instructions for use.

The present invention belongs to the technical field of phosphate ore beneficiation and relates to a large-scale process method for a siliceous-calcareous phosphate ore spiral chute. Specifically, it includes: (1) Raw ore desliming: The raw ore is deslimed, and the deslimed raw ore enters the next step; (2) Classification and gravity separation: The deslimed raw ore is classified into several relatively narrower particle sizes according to certain conditions, and the products of each particle size are respectively subjected to gravity separation using a chute (with a diameter greater than 1200 mm). The concentrates and tailings after gravity separation of the products of each particle size are respectively combined into gravity separation concentrates and gravity separation tailings; (3) Flotation of gravity separation products. The present invention adds desliming and classification and gravity separation operations, which can effectively reduce the problem of entrainment of fine particle sizes in each strip in the chute (with a diameter greater than 1200 mm) and the problem of poor separation accuracy of the chute (with a diameter greater than 1200 mm) caused by equal-settling particles, improve the grade difference between the concentrates and tailings separated by the chute (with a diameter greater than 1200 mm), enhance the adaptability of the reagents in the subsequent flotation process, and improve the fluidity of the flotation foam.

The invention provides a battery recovery method and a battery recovery device, and the battery recovery method comprises the following steps: carrying out crushing treatment on a battery, and carrying out heating volatilization treatment on the crushed battery to obtain a gaseous mixed material and a solid mixed material; separating the solid mixed material to respectively obtain a diaphragm, a pole piece, black powder, copper particles and aluminum particles; in the separation process of the solid mixed material, the solid mixed material and / or an intermediate mixture obtained after the solid mixed material is separated are / is scattered. Through the technical scheme provided by the invention, the technical problem that the material separation effect of a battery recovery method in the prior art is relatively poor can be solved.

The invention relates to the technical field of marine deposition backflow sand recovery, and discloses a marine deposition backflow sand recovery method which comprises the following steps: (1) backflow tail mud collection and concentration regulation and control: systematically collecting overflow tail mud from a mortar ore storage hopper and a hydraulic classifier in a marine deposition sand beneficiation process, pumping the backflow tail mud into a slurry mixing tank, and carrying out slurry mixing and concentration regulation and control on the overflow tail mud; the mass concentration is accurately regulated and controlled within the range of 32%-48%; the backflow tail mud generated in the marine sedimentary sand beneficiation process is collected through the system, a multi-step cooperative treatment technology is adopted, especially ultrasonic cavitation and mechanical cooperative dispersion, enhanced secondary scrubbing, precise hydraulic cyclone classification and other technical means are adopted, particle aggregates formed by wrapping of salt and fine mud are effectively dissociated, and the separation effect is good. Therefore, qualified quartz sand particles of + 0.15 mm which are lost in the tail mud originally are efficiently recovered, the overall recovery rate of the quartz sand is remarkably improved, waste of precious silicon resources is reduced, and the comprehensive utilization level of the resources is improved.

The invention discloses a method for extracting copper fine powder by flotation of copper-containing ore, which belongs to the technical field of mineral processing, and comprises the following steps: after copper-containing raw ore is crushed, ground and classified by a cyclone, overflow enters flotation, and settled sand is returned for regrinding; sodium carbonate is added into graded overflow to adjust the pH, a sodium hexametaphosphate-polyacrylamide composite dispersant is added, and copper sulfate is added and stirred after low-temperature microwave heating; gradient flotation is conducted, specifically, copper sulfide is roughly selected, the pH is adjusted, an amino-sulfonic acid group synergistic modified layered double metal hydroxide / cobalt ferrite composite collecting agent is added, and rough concentrate 1 is obtained through high-frequency pulse air inflation flotation; copper oxide roughing is conducted, clear water is supplemented to adjust the pH, and a collecting agent is supplemented to obtain rough concentrate 2; scavenging is performed for three times, a collecting agent is added for flotation, and concentrate returns to the previous stage; the rough concentrates are combined, and magnetic impurities are removed through high-gradient magnetic separation to obtain magnetic concentrates; and carrying out microbiological leaching on tailings to recover copper. The composite collecting agent is prepared through layered double hydroxide carrier synthesis, amino modification, sulfonic acid group grafting and cobalt ferrite anchoring.

The invention relates to the technical field of equipment control, and discloses a construction waste brick-concrete material fine sorting and regeneration system, which comprises a characteristic detection subsystem for carrying out characteristic detection on a construction waste brick-concrete material entering a sorting and regeneration system to obtain brick-concrete material characteristic data; the construction subsystem is used for constructing a multi-equipment control network operation strategy of the crusher, the vibrating screen, the winnowing machine and the magnetic separator according to the brick-concrete material characteristic data; the dynamic parameter adjustment subsystem is used for carrying out dynamic parameter adjustment on each device in the sorting and regeneration system based on the brick-concrete material characteristic data and the multi-device control network operation strategy to obtain a device operation parameter set; and the power distribution subsystem is used for inputting the equipment operation parameter set into an energy consumption optimization algorithm for power distribution to obtain an equipment power optimization control instruction, and the optimal balance between the sorting precision and the energy efficiency is realized.

The invention discloses a medical waste pipe-made injection bottle treatment device and a treatment method.The medical waste pipe-made injection bottle treatment device comprises a crushing unit, a screening unit and a rubber plug and aluminum ring separation unit, the rubber plug and aluminum ring separation unit comprises a first rack, a first conveying belt device and a pressing and twisting device, and the first conveying belt device and the pressing and twisting device are both installed on the first rack; the pressing and rubbing device comprises a first gear motor and a pressing and rubbing plate, a first crank arm is installed on an output shaft of the first gear motor, a plurality of second crank arms are further rotationally installed on the first rack, a plurality of connecting sleeves are fixedly arranged on the upper side of the pressing and rubbing plate, and extending shafts at the lower ends of the first crank arm and the second crank arms are connected with the corresponding connecting sleeves in a rotating fit mode. The combination of the rubber plug and the aluminum ring is conveyed to the rubber plug and aluminum ring separation unit through the screening unit to be separated, the separation efficiency of the aluminum ring and the rubber plug is higher, and the separation effect is better.

The present disclosure relates to a method for processing birch bark. The present disclosure further relates to an arrangement for processing birch bark.

The invention discloses a large-leaf tea standard impurity removal production line, and particularly relates to the technical field of tea leaf processes, the large-leaf tea standard impurity removal production line comprises an impurity removal mechanism and a conveying mechanism, the impurity removal mechanism comprises a negative pressure winnowing machine, a tea refining machine, an electrostatic impurity removal machine, a first carding machine, a brush roller machine, a first shaking and screening machine, a tea leaf color sorter, a second carding machine, a second shaking and screening machine and an infrared color sorter; the conveying mechanism comprises a first conveyor, a second conveyor, a third conveyor, a first material returning conveyor, a Z-shaped elevator, a second material returning conveyor, a first material discharging conveyor, a transition conveyor, a fourth conveyor, a second Z-shaped elevator and a second material discharging conveyor. Through standardized process, multi-stage precise impurity removal, intelligent control and circular treatment design, the problems of poor impurity removal effect and low automation in the prior art are systematically solved, equipment is effectively connected to form a production line, automation of the whole line is realized, the tea quality is improved, and the cost is reduced.

The invention discloses a fine beneficiation method for stage grinding and stage tailing discarding of low-grade chromium ore, which comprises the following steps: first-stage ball-milling grinding, first-stage screening classification, first-stage hydrocyclone classification, second-stage hydrocyclone desliming, spiral chute reselection roughing, spiral chute reselection scavenging and spiral chute reselection concentration. Hydrocyclone security classification, middling concentration, fluidized bed reselection, second-stage pre-screening inspection classification, second-stage ball-milling ore grinding, magnetic separation iron removal, table reselection, spiral chute reselection concentrated concentrate and table reselection concentrate are combined and then fed into a belt filter to be filtered, and the Cr2O3 grade is larger than or equal to 50%, the Cr / Fe ratio is larger than or equal to 2.2, and the moisture lt is obtained; and 12.0% of final qualified chromium concentrate is obtained. According to the method, separation and enrichment of the chromium concentrates with different particle sizes are achieved through step-by-step fine separation of stage grinding, stage tailing discarding and advanced concentrate obtaining, the grade and the recovery rate of the chromium concentrates are remarkably improved, and the method has the advantages of being reliable in technological process, stable in product quality, low in comprehensive energy consumption and the like.

The invention provides a high-added-value recycling method of silicon and iron elements in iron tailings, and relates to the technical field of high-value and resource utilization of metallurgical solid wastes. The method comprises the steps of iron tailing grinding, middle-stage magnetic separation, microwave roasting, water quenching, grinding, high-stage magnetic separation, first-stage hot-pressing acid leaching, vacuum roasting, water quenching, second-stage hot-pressing acid leaching, low-stage magnetic separation of weakly magnetic minerals, ultrasonic acid leaching for iron extraction, aging reaction, filtering, drying and roasting. And finally obtaining high-purity quartz powder of more than 4N grade and nano iron oxide of which the purity of Fe2O3 is more than 95%. According to the method, silicon and iron elements in the iron tailings are recycled in a layered and stepped manner, and the acid leaching filtrate generated in the preparation process of the high-purity quartz powder is subjected to closed treatment, so that valuable components of silicon and iron in the iron tailings are utilized at a high value to the maximum extent, and no secondary waste liquid is discharged; meanwhile, the problem of fluorine pollution in the traditional process is avoided in the process of preparing the high-purity quartz powder, and the method is low-carbon and green and has remarkable economic benefits.

The invention discloses a beneficiation method of high-quality phosphoric ore pulp for producing hemihydrate-dihydrate phosphoric acid, and relates to the technical field of phosphorite beneficiation. The method comprises the following steps: primarily crushing medium-low-grade collophanite, grinding and grading to obtain flotation pulp; after sulfuric acid and a reverse flotation collecting agent are added into flotation pulp for pulp mixing and mineralization, the flotation pulp is pumped into a roughing flotation column for roughing, and roughing concentrate is obtained; the roughing concentrate is subjected to size mixing and pumped into a cyclone set to be subjected to cyclone classification, and sand setting ore pulp with sesquioxide reduced is obtained; carrying out size mixing on the sand setting ore pulp, and pumping the ore pulp into a fine flotation column to obtain fine phosphoric ore pulp; concentrating the concentrated ore pulp through a thickener, pressurizing and filtering, and supplying the concentrated ore pulp to a semi-hydrated-dihydrated phosphoric acid device for use. A flotation column is adopted for roughing, part of sesquioxide in the phosphoric ore pulp is removed through low-pressure rotational flow grading, deep magnesium removal is conducted through a fine selection technology, magnesium oxide in the ore pulp is further reduced, and the phosphoric ore pulp meeting the production requirement of the semi-hydrate-dihydrate phosphoric acid technology is obtained through concentration and filter pressing dehydration of a thickener.

The invention is suitable for the technical field of slurry making and ore separating devices, and provides a mining wet-type screening slurry making and ore separating device which comprises an ore feeding machine, a wet-type screening machine, a slurry making machine and an ore separating machine. The slurrying machine is composed of a slurrying frame, a slurry feeding cylinder, a slurrying cylinder, a slurry discharging cylinder, a connecting cylinder, a rotating mechanism, a screw rod, a control mechanism, a rotating cylinder, an arc-shaped guide vane, a homogenizing paddle, an adjusting mechanism and a control system, the arc-shaped guide vane is an inwards-concave arc-shaped vane, the concave surface of the arc-shaped guide vane faces the slurry feeding direction, and the homogenizing paddle is a rectangular paddle; the adjusting mechanism is matched with the rotating mechanism, the control mechanism and the screw rod to change the inclination angles of the arc-shaped guide vanes and the homogenizing paddles, the arc-shaped guide vanes and the homogenizing paddles realize accurate regulation and control on the ore pulp concentration in a manner of rotating and changing the inclination angles, and when the inclination angles are reduced, the retention time of the ore pulp is prolonged; and when the inclination angle is synchronously increased, the retention time of the ore pulp is shortened, and the mixing concentration of the ore pulp is reduced.

The invention discloses a multi-stage circulating graphite flotation process which specifically comprises the following steps: S1, coarsely crushing a graphite mineral material containing crystalline flake graphite, then feeding the graphite mineral material into a screening machine for grading, separating out oversize coarse grain products and undersize fine grain concentrate, carrying out screening treatment on the oversize coarse grain products again through scavenging equipment, and screening the oversize coarse grain products to obtain oversize fine grain concentrate and undersize fine grain concentrate; then feeding undersize fine-grain concentrate and scavenged materials into a grinding machine for crushing and grinding treatment, and discharging the ground materials from a discharge port; s2, separation flotation; and S3, ore grinding and flotation. The invention relates to the technical field of purification of graphite in nonmetallic minerals. According to the multistage circulating graphite flotation process, the flotation efficiency can be greatly improved by simplifying the flotation process, the flotation effect can be greatly enhanced by adopting the flotation agent, and the graphite flotation process is simple in flotation procedure, good in flotation effect and high in practicability. Concentrate and tailings can be subjected to more sufficient flotation treatment by utilizing the flotation agent.

A process for the direct recycling of electrode scrap generated as production waste during the production of lithium-ion batteries is to be developed that enables the recycling of electrode scrap from LIB production through mechanical stressing without adversely altering the active materials, so that it can be returned to production. This is achieved by mechanically stressing the electrode scrap, comprising pre-crushing the electrode scrap into bulk material and subjecting the pre-crushed electrode scrap to mechanical stressing in a conditioned atmosphere in a fluidized-bed counter-jet mill.

The utility model discloses a secondary processing system for steel slag, which is sequentially provided with a raw material plant, a feeding station, a first magnetic separation screening station, a purification station, a second magnetic separation screening station and a finished product station according to a process sequence, and low-temperature solid steel slag subjected to primary treatment is conveyed into the closed raw material plant by a belt conveyor or a dumper; after the low-temperature solid steel slag is pretreated, materials are conveyed by the belt conveyor in the closed belt vestibule in the whole process from the feeding station, the first magnetic separation screening station, the purification station and the second magnetic separation screening station to the finished product station in sequence, so that centralized dust collection and point type dust collection are combined, and secondary pollution cannot be generated in the whole processing process. A multi-stage iron separation process is adopted, it is ensured that magnetic powder and slag steel of steel-making of return ironmaking are higher than current national or industrial related standard requirements, the granularity of the steel slag tailings is small, the content of metal iron and f-CaO (free calcium oxide) is greatly reduced, and a foundation is laid for large-scale application of the steel slag tailings to the building material industry.

The utility model relates to the technical field of dry grinding and dry separation of iron ore and similar processes, and particularly discloses a dry grinding and dry separation system which comprises an incoming material conveying system, a roller mill, a dynamic powder concentrator, a dry classification cabin and a fine powder collecting and conveying system. A discharging hole of the supplied material conveying system is communicated with a feeding hole of the roller mill; a discharging hole of the roller mill is communicated with a feeding hole of the dynamic powder concentrator; a coarse particle material outlet of the dynamic powder concentrator is communicated with a material inlet of the dry type grading cabin; an oversize coarse particle discharging opening of the dry type grading cabin is communicated with a feeding opening of the roller mill; and a fine powder discharge hole of the dynamic powder concentrator is communicated with the fine powder collecting and conveying system. Finished product materials with various particle sizes can be provided, and the requirements of customers for different finished product particle sizes are met; fine powder screened by the dynamic powder concentrator is collected by a dust collector and then is directly conveyed to a tailing discarding procedure, so that the handling capacity of the dry classification cabin is reduced; the use condition of the dry-type grading cabin is optimized, and the system flow is simplified.