524results about "Solid separation" patented technology

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 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 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 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.

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 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 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.

The invention discloses a multi-stage separation synergistic power coal washing process, and belongs to the technical field of coal washing processing. The TDS intelligent dry separation system, the dry-wet combined desliming process, the super coal slime classification cyclone, the super coal slime dense medium cyclone and the ultrahigh-pressure elastic squeezing filter press are in multi-stage cooperative linkage to be used for power coal washing, the moisture content and the ash content are reduced to the maximum extent in the separation stage, and the heat productivity of the power coal is increased. Compared with a process before improvement, the power coal washing process with cooperation of multi-stage separation has the advantages that the gangue sorting efficiency and the power coal productivity are improved, the super coal slime dense medium cyclone, the super classification cyclone and the ultrahigh-pressure elastic squeezing filter press are orderly used in the power coal washing process, the water content of a filter cake is greatly reduced, and the water content of the filter cake is greatly reduced. The water content of the filter cake is obviously superior to that of a common quick-opening membrane filter press and is lower than that of the filter cake of dried coal slime, so that the fluctuation range of the heat value of the power coal is lower, the heat value of gangue is reduced, and the heat value of the power coal is improved.

The invention discloses a coal gasification fine slag and coal slime collaborative flotation treatment method based on assistance of oily sludge, and relates to the technical field of industrial solid waste resource utilization. The method comprises the following steps: 1) pretreating the oily sludge; (2) mixing the fine coal gasification slag and the oily sludge, pulping and grinding; 3) preparing ore pulp; and 4) flotation separation. According to the method, oil-containing sludge is used for replacing part of a traditional flotation reagent, efficient enrichment of carbonaceous and oil in the coal gasification fine slag and coal slime and separation of inorganic gangue are achieved through the steps of pretreatment, mixing, flotation and the like, and a clean coal product with the ash content smaller than or equal to 10% and the heat value larger than or equal to 7000 kilocalories and tailings with the oil content smaller than or equal to 1% (the lowest value can be 0.5% or below) and the ash content larger than or equal to 80% are obtained. According to the method, the dosage of traditional flotation reagents can be greatly reduced, the treatment cost is reduced, synergistic recycling and harmlessness of the three kinds of solid waste are achieved at the same time, and economic and environmental benefits are achieved.

The application discloses a beneficiation method for comprehensively recovering niobium, rare earth and pyrite from low-grade niobium ore, and comprises the following steps: (1) grinding: grinding the niobium ore after crushing to a fineness of 85% to 87% of 0.038 mm, and then adjusting the ore pulp concentration to 25% to 30%; (2) pre-concentration by strong magnetic separation; (3) re-concentration of the rough magnetic separation concentrate by gravity separation; (4) re-separation of the middling concentrate; and (5) flotation separation of the gravity separation concentrate: combining the gravity separation concentrate 1 in the step (3) and the gravity separation concentrate 2 in the step (4) to obtain a gravity separation concentrate, wherein the gravity separation concentrate is a mixed concentrate rich in niobite, rare earth and pyrite; and after the gravity separation concentrate is adjusted into an ore pulp with a concentration of 25% to 35%, the ore pulp is subjected to flotation separation. The application is aimed at the multi-metal low-grade niobium ore with niobite, rare earth and pyrite being associated, realizes efficient separation among the niobium ore, the rare earth ore, the pyrite ore and the gangue ore, and achieves the purpose of comprehensively recovering the niobite, the rare earth and the pyrite.

The utility model provides efficient quartz sand magnetic separation purification equipment, which relates to the technical field of quartz sand screening and comprises a support frame, a quartz sand magnetic separation assembly is mounted on the inner side of the support frame and comprises a filter screen mounted on the inner side of the support frame, and an electromagnetic flexible plate conveyor belt is arranged on the lower side of the filter screen. An adsorption scraping plate is arranged on the lower side of the electromagnetic flexible plate conveying belt; when the electric rolling shaft drives the electromagnetic flexible plate conveying belt to rotate, magnetic impurities can be captured by the electromagnetic flexible plate conveying belt, and quartz sand can be conveyed to the tail end by the electromagnetic flexible plate conveying belt and falls into the feeding plate, so that the screening and purifying effects are achieved; due to the fact that the magnetic impurities are attracted to the surface of the electromagnetic flexible plate conveying belt, when the electromagnetic flexible plate conveying belt rotates to the lower side position, the magnetic impurities can be scraped to the magnetic material discharging plate through the attraction scraper on the scraper frame, and therefore the magnetic impurities are separated from the electromagnetic flexible plate conveying belt.

The invention belongs to the technical field of phosphorite beneficiation, and relates to a collophanite re-flotation combined selection and middle grading quality-grading flotation method. According to the technical scheme, the method comprises the steps that phosphoric ore pulp is fed into a spiral chute set to be reselected, reselected products including reselected concentrate and reselected tailings are obtained, then the reselected concentrate obtained through separation is fed into a flotation dealumination procedure, reselected concentrate and tailings are obtained, the tailings obtained after reselected flotation are fed into a grading and grading procedure, and tailings 1 and middlings are obtained. And then the middlings and the spiral chute heavy tailings are combined and enter a heavy tailing flotation dealumination procedure, and heavy tailing concentrates and tailings 2 are obtained. The process has the advantages that the mixed heavy, fine and heavy tailings can be effectively classified in the industrial production, so that the flotation comprehensive recovery rate in the industrial production is effectively improved, and the flotation auxiliary material cost is reduced.

A device (1) configured to implement a method for discharging the electric charge of batteries, cells and / or rechargeable batteries, comprising: - an inactivation chamber (2) of the batteries, cells and / or rechargeable batteries to be discharged introduced through an inlet path (21); the inactivation chamber (2) being delimited by one or more walls (22) and by a bottom (23); - an outlet path (25) of the discharged batteries, cells and / or rechargeable batteries defined in the inactivation chamber (2); - at least one inductive winding (3) configured to be powered by an electric current arranged externally to the walls (22) and wound around a winding axis (A), the winding axis (A) being preferably orthogonal to the bottom (23); the at least one inductive winding (3) being adapted to heat by induction the walls (22) of the inactivation chamber (2); the walls (22) being made of a material adapted to transmit heat so that the walls (22) heated by induction are adapted to heat by radiation the batteries, cells and / or rechargeable batteries arranged inside the inactivation chamber (2). The device comprises: - inerting means configured to introduce one or more inert gases into the inactivation chamber (2) so as to eliminate the oxygen and the humidity present inside the inactivation chamber (2); - a tank (7) of the discharged batteries, cells and / or rechargeable batteries received from the inactivation chamber (2) through the outlet path (25); the tank (7) and the inactivation chamber (2) being communicating with each other through the bottom (23); the bottom (23) of the inactivation chamber (2) being movable between a closing position in which the bottom (23) is positioned so as to close the outlet path (25) and an opening position in which the inactivation chamber (2) is communicating with the tank (7); - grinding means (9) of the discharged batteries, cells and / or rechargeable batteries, the grinding means being arranged in the tank (7).

The application is a kind of stone powder sorting system, including feeding equipment, feeding equipment is feeding for slurry preparation equipment, the stone block outlet of slurry preparation equipment is transported to the temporary storage yard through the belt conveyor, the first screening equipment is connected with the ore slurry liquid outlet, the sand outlet of the first screening equipment is connected with the first spiral dewatering equipment, the first spiral dewatering equipment is provided with the discharge port and the tailing slurry liquid outlet, the discharge port is discharged as building sand, the ore slurry liquid outlet of the first screening equipment is connected with the primary cyclone sorting equipment, the overflow outlet of the primary cyclone sorting equipment is connected with the secondary cyclone sorting equipment, the underflow outlet of the secondary cyclone sorting equipment is connected with the primary dynamic static separation equipment, the tailing slurry liquid outlet of the primary dynamic static separation equipment is connected with the four-stage concentration equipment, the concentrated ore slurry outlet of the four-stage concentration equipment is connected with the four-stage dewatering equipment, the application can perform ladder classification screening on the stone powder, the whole system is closed loop connection, and the dust pollution to the environment is avoided.

The application discloses a method for improving recovery rate of extremely fine-grained gold ore by multi-process cooperation and belongs to the field of gold leaching by a wet method.According to different occurrence states of the extremely fine-grained gold ore, the application sequentially carries out phased and targeted recovery in the order of flotation, magnetic separation, alkali leaching pretreatment and cyanide leaching, or sequentially carries out phased and targeted recovery in the order of alkali leaching pretreatment, cyanide leaching, cyanide breaking, flotation and magnetic separation.Through the multi-process cooperative process, the application realizes phased and accurate recovery of gold in different occurrence states in the extremely fine-grained gold ore, significantly improves the total recovery rate of gold, and has the advantages of mild process, controllable cost and good environmental protection, thereby providing a new technical scheme for efficient recovery of extremely fine-grained refractory gold ore and having a wide industrial application prospect.

The invention belongs to the technical field of rock debris collection and processing, in particular to a rock debris cleaning and processing device and a rock debris automatic collection and cleaning system. The device comprises a box, a support frame one and a base. The box is fixed on the base, and a support frame one is fixed in the middle of the inner side of the box. The top of the support frame one is respectively provided with a rotatable work station turntable, a rock debris lifting and filtering mechanism and a spraying and drying mechanism. The device further comprises a rock debris collection mechanism. The rock debris collection mechanism continuously transports the rock debris fished out in the drilling process to the rock debris cleaning and processing device. After the first-stage filtering and second-stage floating washing of the rock debris lifting and filtering mechanism, the rock debris with large particles, impurities and surface-attached mud is removed. Then, the rock debris target sample is continuously put into a single rock debris tank on the work station turntable by a bucket elevator and is transported to the spraying and drying mechanism for cleaning and drying treatment. The whole rock debris collection and cleaning process has high automation degree, high efficiency and good cleaning effect.

The invention provides machinable silicon carbide native crystals and a screening method thereof. The screening method comprises the following steps: S1, directly observing the outer surface of a silicon carbide primary crystal, and if a polymorphic inclusion region is not observed, respectively intercepting wafers to be detected on two opposite sides of the growth direction of the silicon carbide primary crystal; s2, observing whether the wafer to be tested has the multi-type inclusion region or not: (1) if the wafer to be tested has no multi-type inclusion region, performing a microtube stress scanning test, and screening silicon carbide native crystals; (2) when one of the two wafers to be detected has a multi-type inclusion region, continuously intercepting a new wafer to be detected until the intercepted wafer to be detected does not have the multi-type inclusion region, and then screening the residual silicon carbide primary crystals according to the screening method in the step (1); and (3) when the two wafers to be detected both have the multi-type inclusion regions, discarding the residual silicon carbide primary crystals. According to the screening method, the processing efficiency is improved, waste is avoided, and the production cost is reduced.

The invention belongs to the technical field of waste lithium ion battery recycling and processing, and particularly relates to a ferrophosphorus bare battery cell recycling and processing method and system based on intelligent sorting, and the recycling and processing system comprises a feeding and crushing unit which is used for carrying out regular crushing on ferrophosphorus bare battery cells; the diaphragm sorting unit is used for separating a diaphragm from a pole piece material; the AI sorting unit is used for separating the positive plate and the negative plate based on visual identification; the positive plate processing unit is used for processing a positive plate and recycling aluminum foil and pole plate powder; the negative plate processing unit is used for processing a negative plate and recycling copper foil and graphite; the feeding and crushing unit, the diaphragm sorting unit and the AI sorting unit are sequentially connected, and the positive plate processing unit and the negative plate processing unit are respectively connected with the AI sorting unit.

The application relates to the technical field of ore dressing, and discloses a method for preparing ceramic tile glue raw materials from tungsten tailings, ceramic tile glue raw materials and ceramic tile glue. The method comprises the following steps: (1) preparing the tungsten tailings into ore slurry with a concentration of 10-20 wt%, and sequentially performing magnetic separation and concentration desliming on the ore slurry to obtain magnetic separation concentrate sand with a sand concentration of 25-35 wt%; (2) performing rough flotation of sulfur on the magnetic separation concentrate sand together with an adjusting agent, copper sulfate, a collecting agent I and 2# oil to obtain sulfur flotation tailings with a sulfur content of not more than 0.1 wt%; and (3) performing impurity removal flotation on the sulfur flotation tailings together with a collecting agent II to obtain impurity removal concentrate, and sequentially performing dehydration and drying on the impurity removal concentrate to obtain ceramic tile glue raw materials with a water content of not more than 0.5 wt%. By adopting the method, ceramic tile glue raw materials with a total sulfur content of less than 0.1 wt%, argillaceous mineral content and mica content of less than 1 wt% can be obtained.

The application discloses a kind of sedimentation tank sludge centralized management system and its management method, belong to sewage treatment field, a kind of sedimentation tank sludge centralized management system, including heating unit, heating unit includes water guide chassis, water guide chassis is sequentially provided with feeding station, multiple heating stations and discharge station according to counterclockwise direction, feeding station, multiple heating stations and discharge station are annular array, water guide chassis is provided with multiple heating mechanism on heating station, discharge station is provided with discharge hole, the middle position of water guide chassis is provided with driving assembly, driving assembly is fixedly connected with multiple annular array storage assembly, feeding station, multiple heating stations and discharge station are adapted with storage assembly, it can be realized, small particle's iron waste, plastic and other waste in mud material are respectively concentrated management, and the effect of management is improved.

The invention discloses a magnetic separation, enrichment and recovery process for low-grade vanadium titano-magnetite, which belongs to the technical field of comprehensive utilization of vanadium titano-magnetite, adopts a combined mineral separation process of dry pre-enrichment and tailing discarding, wet grinding, concentration and refinement, combination of gravity and magnetism and middling retreatment, selects mature industrial equipment and optimizes the combination. High-efficiency dry pre-selection equipment, wet grinding equipment, a multi-section reselection and middling retreatment system and solid-liquid separation equipment are utilized, a large amount of tailings are discarded at the front end of a mine, iron and titanium are efficiently separated and comprehensively recycled in the middle main process, the recycling rate bottleneck is broken through through the middling retreatment technology, near-zero discharge of wastewater is achieved, and compared with a conventional process, water can be saved by 50-60%, and the economic benefit is high. According to the method, the grinding and separation cost is saved by 60-70%, the energy-saving effect is remarkable, the purposes of cost reduction, efficiency improvement, comprehensive utilization of resources and clean production are achieved, the production and technical problems of low-grade vanadium titano-magnetite mine enterprises in arid and water-deficient areas are effectively solved, and the method is suitable for large-scale production and application.

The invention relates to a silica ore dressing method which comprises the following steps: step 1, crushing raw ore of silica ore, step 2, grinding the crushed silica ore by adopting a ball mill, step 3, carrying out graded desliming treatment on the ground silica ore by using a hydrocyclone, step 4, carrying out weak magnetic separation on the deslimed silica ore, and step 5, carrying out magnetic separation on the deslimed silica ore. And 5, the non-magnetic material subjected to weak magnetic separation is subjected to strong magnetic separation, and silica concentrate is obtained. Before the ore is subjected to strong magnetic separation, strong magnetic minerals are removed through weak magnetic pre-separation, the strong magnetic separator is effectively prevented from being blocked, the operation stability and the production continuity of equipment are improved, various magnetic impurity minerals including intergrowth particles can be removed to the maximum extent through the whole technological process, and the production efficiency is improved. Such as hematite, limonite, biotite, ilmenite, pyrite and garnet.

The present application relates to the technical field of mineral processing, and in particular, relates to a method for recovering electrically fused zirconia cyclone dust and application thereof. The method for recovering electrically fused zirconia cyclone dust comprises the following steps: mixing electrically fused zirconia cyclone dust with water to form a slurry, and then performing gravity separation roughing to obtain gravity separation roughing concentrate and gravity separation roughing tailings; performing gravity separation scavenging on the gravity separation roughing tailings to obtain gravity separation scavenging concentrate; mixing the gravity separation scavenging concentrate and the gravity separation roughing concentrate, and then performing screening to obtain oversize and undersize; performing gravity separation cleaning on the oversize to obtain gravity separation cleaning concentrate and gravity separation cleaning tailings; mixing the undersize with a collector solution and a foaming agent, and then performing reverse flotation roughing to obtain reverse flotation roughing concentrate and reverse flotation roughing tailings; and mixing the reverse flotation roughing concentrate and the gravity separation cleaning concentrate to obtain zircon concentrate. The method can efficiently recover zircon concentrate, and improve the economic added value of electrically fused zirconia cyclone dust waste.

A system for recovering bitumen, granules, and limestone fillers from asphalt shingles includes: a mixer; a filter; a first dryer; a centrifuge; a second dryer; and a distillation unit. The mixer receives and mixes asphalt shingles and a solvent to produce a slurry. The filter processes the slurry to generate a cake material and a filtrate. The cake material is received and heated by the first dryer to isolate a first constituent of the asphalt shingles. The filtrate is received and separated by the centrifuge into a first phase material and a second phase material. The first phase material is received and heated by the second dryer to isolate a second constituent of the asphalt shingles. The second phase material is processed by the distillation unit to isolate a third constituent of the asphalt shingles. A method for recovering bitumen, granules, and limestone fillers from asphalt shingles is also disclosed.

The application discloses a method for co-enriching tungsten ore and rutile, and belongs to the technical field of ore dressing. The method comprises the following steps: crushing, grinding, removing iron and removing sulfur from a tungsten-titanium associated ore in sequence to obtain a desulfurized tailing ore slurry; after pH adjustment, metal ion-hydroxamic acid complex is used as a collector to perform tungsten-titanium mixed flotation on the desulfurized tailing ore slurry to obtain a tungsten-titanium mixed concentrate; after removing a reagent, fatty acid is used as a collector and aluminum sulfate is used as an inhibitor to perform tungsten ore flotation on the tungsten-titanium mixed concentrate, and the flotation concentrate is a tungsten concentrate, and the flotation tailings are a titanium concentrate. The method can realize efficient separation and recovery of tungsten ore and rutile in the tungsten-titanium associated ore, and truly realizes the synergistic extraction of tungsten and titanium resources.