1154results about "Solid separation" patented technology

A system and method are provided 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. A fluffer can be used to re-size and liberate the incoming materials to a suitable size for further processing in size screen equipment and subsequent downstream separation. The fluffer can re-size the material to a size of approximately 20 inches or larger, plus / minus a few inches, whereby reducing the material to a smaller size would impact the splits in subsequent downstream equipment.

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 relates to the technical field of decoration garbage resource recycling, in particular to decoration garbage resourceful treatment production equipment and method, and the method comprises the steps that decoration garbage is evenly scattered on a conveying belt; the decoration garbage on the conveying belt is sorted; the sorted decoration waste is subjected to primary crushing and then screened, and first aggregate and second aggregate are obtained; magnetic separation is conducted on the first aggregate and the second aggregate through a magnetic separator; controlling magnetic separation current in the magnetic separation process of the magnetic separator, performing secondary crushing on the magnetically separated second aggregate, mixing the magnetically separated second aggregate with the magnetically separated first aggregate, and performing winnowing; screening the winnowed aggregate, and if the aggregate with the particle size larger than the preset particle size exists after screening, performing secondary crushing on the aggregate again to obtain the aggregate meeting the preset particle size; the aggregate meeting the preset particle size is subjected to three-stage crushing and screening, and then fine aggregate, medium aggregate and coarse aggregate are obtained. Therefore, the quality of the recycled aggregate of the decoration garbage is improved.

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 relates to a corn kernel and skin screening method which comprises the following steps: step 1, firstly, conveying a mixture mixed with corn bran, corn stigma and corn seeds into a storage disc; then, winding and collecting the filamentous corn bran and corn stigma through a cleaning assembly; step 2, conveying the cleaned mixture into a mixed sealed water tank part, so that the corn seeds with the density meeting the set requirement float upwards; step 3, firstly, the corn seeds in the liquid are taken out through rising of a vibration output part, and the corn seeds with water discharged are air-dried through an air blowing part; then, the inclined vibration part drives the corn seeds to move upwards, the air blowing assembly blows air in the forward direction, and chippings smaller than meshes of the inclined vibration part fall into the waste box; secondly, corn seeds are conveyed to a vibrating screen conveying belt through a guide plate; the device is reasonable in design, compact in structure and convenient to use.

The invention discloses an automatic product quality regulation and control method for a coarse slime separation system in the technical field of slime separation and recovery. The method comprises the steps that the real-time feeding concentration value, the real-time feeding size fraction, the feeding flow, the clean coal size fraction, the tailing size fraction, the clean coal ash content detection value and the tailing ash content detection value of a teetered bed separator are obtained; based on the real-time feeding concentration value of the teetered bed sorting machine, controlling the backflow amount of the grading cyclone group; setting the water jacking amount of the teetered bed sorting machine based on the real-time feeding size fraction and the feeding flow of the teetered bed sorting machine; the water jacking amount of the teetered bed separator is adjusted based on the feeding size fraction, the clean coal size fraction and the tailing size fraction of the teetered bed separator; and the set density is adjusted based on the clean coal ash content detection value and the tail coal ash content detection value of the teetered bed sorting machine. According to the method, the coarse slime separation process is stabilized from the source in a feed-forward and feedback adjusting mode, so that the product quality is stabilized, and the problem that production regulation is not timely or incomplete is effectively solved.

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 method for centrifugal desliming and waste pre-discarding and recovery rate improvement of gold ore, realizes direct waste pre-discarding of a part of low-grade slime, and belongs to the technical field of energy-saving production methods. Ore washing slime and placer are obtained after the ore is crushed and washed; the ore washing slurry is precisely classified into slurry with the size being-400 meshes and slurry with the size being 400 meshes; grinding and grading the placer to obtain ground and graded products; grinding and grading products and 400-mesh slime are subjected to main flotation operation, and main flotation concentrate and main flotation tailings are obtained; the-400-mesh slime is subjected to centrifugal classification, and slime centrifugal classification concentrate and centrifugal classification tailings are obtained; the centrifugal classification concentrate is subjected to mud flotation to obtain mud flotation concentrate and mud flotation tailings, and the mud flotation concentrate and the main flotation concentrate are combined into final flotation concentrate. According to the method, pre-discarding of the raw ore slime of the kaolin quartz vein type gold ore containing the ultra-fine particle raw mud is achieved, the production cost is reduced, the flotation recovery rate is increased, and economic benefits are created.

One or two continuous recirculation loops are utilized for the well-site equipment that separates produced fluids into sand, liquid, and gas during drill out and flow back that occurs after fracturing a subterranean formation. When one recirculation loop is utilized, the recirculation loop continuously recirculates fluid between the recirculation chamber of the disclosed sand removal apparatus and a shaker device. When two recirculation loops are utilized, the first recirculation loop continuously recirculates fluid between a recirculation chamber of the disclosed sand removal apparatus and a shaker device, and the second recirculation loop continuously recirculates fluid between the recirculation chamber and a gas separator.

The invention provides a combined beneficiation method for laterite-nickel ore, which comprises the following steps: separating chromite in the laterite-nickel ore through a combined process of one-stage cyclone separation, spiral chute, multi-stage table classification, multiple low-intensity magnetic separation and multiple spiral classification to obtain first chromium concentrate, chromium middling, low-intensity magnetic separation middling and mixed light mineral aggregate; the chromium in the limonite and the chromite subjected to leakage treatment in the mixed light mineral aggregate, the low-intensity magnetic separation middling and the high-intensity magnetic separation magnetic substance is further enriched and separated by combining a combined process of subsequent multiple ball milling, two-stage rotational flow, low-intensity magnetic separation and high-intensity magnetic separation, so that more second chromium concentrate is screened out, the content of the chromium in the subsequent high-pressure leaching stock solution is reduced, and the yield of the high-pressure leaching stock solution is improved. The comprehensive utilization of the chromium element is realized.

A storage battery recycling device includes a container which can store water, a sieve-like placement member provided in the container, and a discharge part configured to perform electric pulse discharge in water in the container in which water is stored, wherein the discharge part is configured to perform the electric pulse discharge a predetermined number of times on an electrode component of a storage battery placed on an upper surface of the placement member, and to separate the electrode component into a plurality of elements made of different materials.

The invention provides an automatic municipal waste treatment system. The system comprises a central monitoring system, a garbage transportation system, an automatic garbage treatment system and a resident reward and punishment management system, based on the central monitoring system, the garbage transportation system and the automatic garbage treatment system, efficient and environment-friendly treatment of garbage can be achieved through advanced scientific and technological means, and meanwhile, the resident reward and punishment management system is achieved. Through the resident reward and punishment management system, the enthusiasm of residents to participate in garbage classification can be improved.

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.

The present invention provides an almond rolling, shelling and screening device and a shelling method, comprising an outer shell, a feeding hopper is arranged on the top of one end of the outer shell, the bottom of the feeding hopper extends to a screening mechanism movably connected in the outer shell, a screening hopper driven by a vibration motor is arranged in the screening mechanism to perform gravity screening of almonds, a rolling mechanism is connected to the rear end of the screening mechanism, the rolling mechanism comprises a supporting conveyor belt and a rolling roller with a variable diameter to perform zoned rolling of the almonds, a screen plate with a vibration motor is arranged on the lower side of the supporting conveyor belt, the tail end of the screen plate extends to the discharge port at the tail end of the outer shell, and a waste port is arranged on the lower side, the device is used to vibrate and screen the almonds by size and the rolling roller with a variable diameter is used to perform zoned rolling of the almonds, so that almonds of different sizes can all obtain corresponding rolling depths, thereby ensuring rolling accuracy, improving product quality, and having good development prospects.

The present invention provides a process for removing impurities from medium- and low-grade collophosphite, which first performs reverse flotation to remove magnesium after grinding, then performs gravity separation, and finally performs reverse flotation to remove silicon to obtain phosphate concentrate. After the powder ore is ground and heated, dolomite is preferentially removed by reverse flotation, reducing the content of fine and micro-grained gangue minerals entering gravity separation, improving the efficiency of spiral chute gravity separation to remove fine-grained iron-aluminum-silicate impurities, greatly reducing the content of fine-grained impurities entering the reverse flotation desiliconization process, greatly reducing the adverse effects of fine and micro-grained particles on reverse flotation desiliconization of cationic collectors, greatly exerting the desiliconization efficiency of cationic collectors, significantly improving flotation efficiency, and finally significantly reducing the content of aluminum, magnesium, and silicate in the phosphate concentrate.

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 provides a clean coal ash content control method and system in a dense medium separation process. The method comprises the following steps: collecting historical data in the dense medium separation process; preprocessing the data; constructing and training a state estimation model and a system dynamic model; and performing real-time control on the ash content of the clean coal based on the constructed state estimation model and the system dynamic model. According to the method, the modeling problem of the large time-lag characteristic in the dense medium separation process is effectively solved, the influence of the feeding pressure on the clean coal ash content is comprehensively considered, the model can more accurately learn the bottom layer physical characteristics in the dense medium separation process, proper control actions can be adopted in time to compensate the influence of external interference factors, the response speed is high, and the real-time performance is high. The method has strong anti-interference capability and is insensitive to noise of ash content measurement. When the scheme is applied to production, the quality of a coal product can be improved by accurately controlling the ash content of the clean coal; and automatic control can be fully achieved, the labor intensity of operators is relieved, and the production efficiency is improved.

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.

The utility model relates to the technical field of iron phosphate purification, and discloses an iron phosphate purification device which comprises a main body mechanism and a uniform conveying mechanism, the uniform conveying mechanism is located on the left side of the main body mechanism, and the main body mechanism comprises a device body, a conveying belt, a supporting frame and an electric push rod. And the conveying belt is movably mounted in the device body. According to the iron phosphate purification device, by installing the main body mechanism, when the device body carries out purification work of iron phosphate, a worker can operate an electric push rod, properly adjust the positions of an electromagnet and an electrostatic plate and cooperate with the design of an electric sliding rail and a sliding block; the iron phosphate impurity removing device drives the impurity removing support to move at a constant speed below the electromagnet and the electrostatic plate, iron materials and impurities adsorbed below the impurity removing support are scraped, the situation that the impurity removing effect of the device on iron phosphate is affected due to excessive accumulation of the iron materials and the impurities is avoided, inconvenience caused by traditional manual cleaning is solved, and the automation and practicability of the device body are improved.

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.