39 results about "Physical separation" patented technology

The application discloses a method for recombining sub-products based on ingredient composition, which comprises the following steps: separating a homogeneous mixture into a plurality of homogeneous intermediate products with different ingredients by a physical separation method; and selecting at least two homogeneous intermediate products to be uniformly mixed according to a set ratio by using a digital blending technology, so as to obtain a required sub-product. By using the method, a single product can be converted into a plurality of sub-products with different characteristics from the initial product without interfering with the existing production process of the product. The process is simple, the process is controllable, and the method is suitable for large-scale production and has a wide application prospect.

The invention relates to the technical field of washing water treatment, and discloses a gradient type oil-solid and water pure physical separation system and method for MTO washing water.The separation system comprises a liquid inlet pipe, a liquid inlet valve and a liquid inlet pump are installed on the liquid inlet pipe, and a secondary deslagging system, a secondary oil-water separation system and a buffer water storage tank are sequentially connected to the liquid inlet pipe in the liquid inlet direction; a liquid level sensor and a backwashing system are mounted on the buffer water storage tank; the backwashing system is sequentially communicated with the secondary deslagging system and the secondary oil-water separation system; a buffer flow guide mechanism is installed at the liquid inlet end of the second-stage deslagging system, and a stepped filler assembly is installed in the second-stage deslagging system. A physical gradient separation process is adopted, step-by-step accurate removal from macroscopic particles to microscopic emulsified oil and efficient recovery of oil phase components in wastewater can be realized, the turbidity and solid content indexes of effluent are remarkably improved, and long-period continuous stable operation can be realized.

The invention provides a method for analyzing the oxygen stable isotope ratio of water in a highly alcoholic beverage, and relates to the technical field of oxygen isotope analysis. The analysis method comprises the following steps: selecting at least two water samples with known oxygen isotope ratios and different values as additive water; diluting the same high-alcohol beverage to be detected by adding water to obtain a diluted sample; measuring an oxygen isotope ratio; and according to the oxygen isotope ratio of the added water and the oxygen isotope ratio of the diluted sample, calculating the oxygen isotope ratio of the water in the highly alcoholic beverage to be measured. According to the analysis method, the concentration of ethanol is reduced through dilution, so that interference of isobaric elements is avoided; and physical separation is replaced by mass conservation equation calculation, and a complex distillation device is not needed. According to the method, pretreatment is remarkably simplified, cost and errors are reduced, and rapid and accurate analysis of the water oxygen isotope in the highly alcoholic beverage is achieved.

The invention discloses a device for repairing underground water pollution of an in-production enterprise by combining bioelectricity-Fenton with a circulating well. The device comprises an extraction well which is vertically arranged underground and is communicated with underground water, and a suspended matter separation mechanism, an electrode display mechanism and a strong oxidation mechanism which are sequentially connected with the extraction well, the suspended matter separation mechanism comprises a separation containing tank communicated with the extraction well and provided with an upward opening, a separation tank top cover with a downward opening is arranged at the top of the separation containing tank, a plurality of separation input pipes communicated with the interior of the separation containing tank are arranged at the bottom of the separation containing tank, and a plurality of suspended matter output pipes communicated with the interior of the separation containing tank are arranged on the side wall of the separation containing tank. The top cover of the separation tank is connected with a separation output pipe which vertically extends in a sliding manner; the device integrates four core technologies of physical separation, electrochemical reaction, Fenton strong oxidation and biodegradation, internal circulation of an underground water body is formed through the circulating well, and underground water discharge or secondary pollution in the remediation process is avoided.

The invention relates to the field of fuel combustion, in particular to an experimental system and a measuring method for cooling and coking characteristics of high-temperature cracked hydrocarbon fuel, physical separation is realized by designing a high-temperature cracking section and a cooling and coking section, and the problem of experimental result mixing caused by coupling of the high-temperature cracking section and the cooling and coking section in a traditional experiment is effectively avoided. According to the separation design, coke generation characteristics in the cooling stage can be independently researched, and the device can flexibly simulate various high-temperature and cooling conditions in actual working conditions by accurately controlling experimental conditions such as the flow rate, the temperature and the pressure of the fuel / condensation medium, and is suitable for researching coking behaviors of various types of fuels.

The invention relates to the technical field of asphalt performance detection, and discloses a volatile component release characteristic-based modified asphalt performance detection method which comprises the following steps: preparing a thin-layer sample and putting the thin-layer sample into a closed detection chamber; linear temperature rise and flow rate switching are carried out to construct a dynamic mass transfer environment; detecting gas concentration to generate a response curve containing fluctuation characteristics; analyzing the curve to construct flow velocity sensitive and insensitive characteristic components; and determining the swelling or dispersing performance of the rubber powder based on the characteristic component. The method comprises the following steps: by superposing a periodically changing carrier gas flow velocity in a continuous heating process, separating a mixed gas concentration signal value into a flow velocity sensitive component and a flow velocity insensitive component by utilizing a dynamic difference that a surface free component is controlled by external convective mass transfer and an internal swelling component is controlled by internal diffusion; no physical separation or chemical extraction is needed, and free oil components which do not participate in the reaction and swelling oil components which are absorbed by rubber powder in the asphalt can be quantitatively distinguished.

The invention relates to the field of waste liquid treatment, and particularly discloses a DMF (Dimethyl Formamide)-containing waste liquid recovery process. The invention relates to a DMF-containing waste liquid recovery process. The process comprises the following steps: S1, coarse steaming treatment; s2, light component removal treatment; s3, heavy component removal treatment: adding an alkaline amine compound into the first kettle residual liquid obtained in S2, and heavy component removal; and S4, carrying out secondary coarse steaming treatment to obtain a DMF product. In the recovery process, the temperature, the pressure and the ethanolamine addition amount of each process are precisely matched, so that the separation efficiency is ensured, the energy consumption is reduced, closed-loop cooperation of physical separation-chemical corrosion prevention-secondary purification is formed, efficient recovery of DMF is realized, the recovery purity meets the industrial requirements, and the method is suitable for industrial production. Meanwhile, the equipment corrosion contradiction in the high-temperature rectification process is effectively relieved, the process meets the industrial production requirement, high-purity DMF can be obtained, the recovery rate is not lower than 95%, and the purity is not lower than 99.9%.

This application discloses a molding apparatus for maintaining material quality through solid-liquid separation, relating to the technical field of physical separation equipment. The apparatus includes a container, a body, an upper mold, a lower mold, and a drive component. The container includes a barrel, a filter element, a drain pipe, and a feed pipe. The container also includes an aeration mixer with a first impeller for clearing blockages in the filter element. The feed pipe includes a first section and a second section. The container further includes a linkage component. A second impeller is partially disposed in the first section within the filtrate zone. The upper mold, the container, and the drive component are all fixedly mounted on the body. This application can control the quality of materials by controlling the solid-liquid separation function, reducing waste caused by substandard material quality, and effectively ensuring the processing and molding effect of the product.

The invention discloses an organic fluorine wastewater treatment method and system based on multi-modal simulation. The method comprises the following steps: analyzing a wastewater sample to obtain suspended particle density distribution and dissolved state concentration indexes; the natural aggregation tendency is evaluated, and if natural effective separation cannot be achieved, the dynamic process that particles aggregate to form a separable structure under external intervention is simulated; iteratively optimizing the simulation parameters to obtain an optimized aggregation condition parameter set; predicting the form and stability of a separable structure, matching and simulating a physical separation mode, and identifying a wastewater characteristic region with a poor expected separation effect; and finally, aiming at the region, adjusting aggregation parameters to generate an enhancement scheme, evaluating the conversion efficiency and outputting verified aggregation processing scheme parameters. According to the method, virtual simulation and intelligent optimization are utilized, the pollutant aggregation behavior is accurately regulated and controlled, the whole-process collaborative design from microcosmic aggregation to macroscopic separation is realized, and the process development efficiency and the treatment effect stability are improved.

The present application relates to oil and gas field development and environmental protection technical field, especially an aging oil demulsification treatment method, comprising: mixing fly ash and sodium hydroxide, then calcining, acid leaching, then mixing with oily sludge and ferroferric oxide, reduction reaction, mixing the reduction reaction product with 3-mercaptopropyl triethoxysilane, modification reaction, to obtain magnetic adsorbent; mixing aging oil, partial phosphate and water, stirring, standing and separating, to obtain pretreated aging oil; adding magnetic adsorbent, complexing agent, wetting reverse agent and demulsifier to the pretreated aging oil, stirring, then microwave irradiation treatment, magnetic separation, vortex separation and centrifugal dewatering, to obtain purified oil. The present application removes FeS particles by magnetic adsorbent, combines with multi-assistant component synergistic demulsification and multi-field coupling physical separation, destroys the stable emulsification system of aging oil, and the process is efficient, suitable for industrial demulsification treatment of high stability aging oil.

The invention discloses a liquid-phase vinyl chloride monomer dehydration and purification system and method based on aggregation-induced demulsification, the system is formed by connecting a deslagging device A, a pre-demulsification separation device B and a high-precision demulsification separation device C in series, the system can continuously operate under the pressure difference of 0.05-0.1 MPa, the water content of the monomer is reduced to 100 mg / L or below, and the influence of acidic materials and iron ions on polymerization is avoided. And while mechanical impurities and part of autopolymers are removed, emulsified water in the vinyl chloride monomer is efficiently removed in a pure physical manner, so that the purity of the monomer is improved, and the quality and performance of a downstream polyvinyl chloride product are further enhanced. The system adopts pure physical separation, is free of chemical agents and resistant to pollution and blockage, has the operating elasticity of 50%-200%, is suitable for a polyvinyl chloride device, improves the purity of monomers, and further enhances the quality and performance of downstream polyvinyl chloride products. The method solves the problems of high environmental protection and treatment cost pressure and high investment cost caused by the generation of strong corrosive waste alkali liquor in the traditional solid alkali method in the current vinyl chloride monomer dehydration.

The invention discloses a method for extracting calcareous microfossils of consolidated sediments, which comprises the following steps: S1, taking a rock core sample or a rock debris sample of the consolidated sediments, cleaning the surface of the rock core sample or the rock debris sample, and crushing the rock core sample or the rock debris sample to obtain a debris sample; s2, weighing a chipping sample, soaking the chipping sample in water, heating the chipping sample, and then freezing the chipping sample to obtain a frozen sample; s3, hydrogen peroxide is added into the frozen sample and mixed, then sieving and cleaning are conducted, and first particles are obtained; adding a weakly alkaline reagent and heating to obtain a first mixture; s4, adding an anti-flocculating agent into the first mixture, mixing, and carrying out ultrasonic treatment to obtain a second mixture; and then sieving, cleaning, drying and collecting a particle sample. According to the method, more calcareous microfossils are physically separated out, chips adhering to the surfaces of the calcareous microfossils fall off, chemical decomposition of the fossils and adhering particles is promoted, meanwhile, preservation of fossil shells is facilitated, and fine particles are prevented from being flocculated and precipitated.

This invention provides a method for purifying sandy kaolin ore, the resulting kaolinite concentrate, and its applications. The method includes the following steps: providing a kaolin slurry; adding a flotation agent to the kaolin slurry for conditioning to obtain a dispersed slurry; performing positive flotation on the dispersed slurry under acidic conditions to obtain a rough kaolinite concentrate; subjecting the rough kaolinite concentrate to acid leaching, followed by solid-liquid separation to obtain a final kaolinite concentrate. This invention achieves efficient recovery of fine-grained kaolinite from sandy kaolin ore, significantly improving separation efficiency compared to traditional physical separation methods. The resulting kaolinite concentrate exhibits significantly reduced iron and titanium impurity content, and its whiteness meets the technical requirements for high-grade ceramic raw materials or fillers, thus broadening the product's application value.

The utility model discloses a cutting fluid floating oil and sediment separating device, which belongs to the technical field of cutting fluid production equipment and comprises a base, an operating platform and a separating box body, and the interior of the box body is divided into a scum separating cavity, a left filtering chamber and a right filtering chamber through a main partition plate and an auxiliary partition plate. And in cooperation with a first flow guide baffle, an arc-shaped flow guide plate, a stepped baffle and other assemblies, physical separation of floating oil and sediment in the cutting fluid is achieved. The sediment collecting assembly is arranged in a sliding mode through a drawing notch, a metal filter screen and a magnet block are arranged in the sediment collecting assembly, and non-metal impurities and magnetic metal filings can be collected in a classified mode. Due to the layout design of the liquid inlet, the liquid outlet and the double blow-down valves, stable flowing of the fluid and partitioned discharge of impurities are ensured. According to the device, through a multi-stage cavity structure and a flow guide system, floating oil blocking, solid grading sedimentation and convenient maintenance are efficiently achieved, and the cutting fluid preliminary purification efficiency and resource recycling convenience are improved.

The utility model discloses magnetic density separation equipment for classifying electronic waste particles, which relates to the technical field of electronic waste treatment and comprises a bottom plate, and four supporting legs and two supporting plates are fixedly connected to the upper surface of the bottom plate. Superconducting magnets fixed to the supporting legs at the corresponding positions and a plurality of rotating rods rotationally connected with the supporting plates at the corresponding positions are arranged above the bottom plate. According to the device, various metals mixed in electronic wastes can be effectively separated at the same time through the paramagnetism of the magnetic fluid and the density difference of different metals, compared with other traditional schemes, the process steps are greatly shortened, and compared with a traditional method depending on chemical reagents or high-temperature smelting, physical separation does not need to use strong acid, cyanide or high temperature, and the cost is reduced. Separation is achieved only through physical fields such as a magnetic field and water flow, so that emission of toxic waste water and waste gas is remarkably reduced, the environmental protection treatment cost of enterprises is reduced, and meanwhile workers are prevented from making direct contact with heavy metal and harmful chemical substances.

The utility model discloses a precious metal waste physical separation and recovery device which comprises a sediment box, a separation box is arranged on one side of the sediment box, a multi-stage separation mechanism is arranged in the separation box, a plurality of opening and closing doors are arranged on the separation box, a liquid level monitoring mechanism is installed on the top of the separation box, and the multi-stage separation mechanism comprises a rotating shaft. A driving motor is fixedly connected to the end of the rotating shaft, a plurality of circular filter plates are mounted on the rotating shaft, and a mounting frame is arranged at the top of one side of each circular filter plate. According to the physical separation and recovery device for the precious metal waste, a plurality of circular filter plates are driven by a driving motor to rotate, so that the lower half parts of the circular filter plates are used for filtering, the filtered parts are rotated to the upper part to brush precious metal, the circular filter plates are prevented from being blocked, precious metal powder is prevented from falling into a collection box, and electroplating wastewater is subjected to multi-stage separation; and meanwhile, the precious metal powder is collected, and the separation effect is effectively improved.

The invention provides a dry material dissolving device and a preparation system, and relates to the technical field, and the dry material dissolving device comprises a cylinder assembly, at least one feeding assembly, a partition plate and a stirring assembly. The output end of the second feeding part is arranged in the circumferential direction of the output end of the first feeding part in a surrounding mode so that an atomization structure can be formed at the output end of the second feeding part, the partition plate is installed in the barrel assembly and divides the barrel assembly into a first cavity and a second cavity, the first cavity is connected with the second cavity through a first through hole, and the stirring assembly extends into the barrel and is connected with the second cavity through a second through hole. The stirring assembly comprises a first stirring piece and a second stirring piece, and the first stirring piece and the second stirring piece rotate coaxially. According to the invention, the dry material can be wetted in advance, the condition that the material is agglomerated in the dissolving process is reduced, the physical separation of the dry material and the solution is realized, the condition that high turbulence generated in the first chamber damages molecular chains of the material, such as polyacrylamide, in the second chamber is avoided, and the preparation effect of the material solution is improved.

The present application relates to the technical field of fluid precision separation, and discloses a six-channel micrometer high-precision filtration separation method, which comprises the following steps: controlling fluid cooling to a supersaturation precipitation temperature to generate colloidal flocculates; sequentially conveying the fluid through a six-stage physical separation sequence composed of gravity sedimentation, centrifugal cyclone, magnetic adsorption and multi-stage filtration medium; collecting terminal filtration differential pressure in real time and calculating the resistance growth rate; when the resistance growth rate exceeds a critical compaction threshold, feedback adjusting the front-end cooling rate or conveying temperature to optimize the flocculate structure rigidity; by establishing a reverse feedback regulation mechanism between the terminal rheological resistance characteristics and the front-end thermodynamic precipitation parameters, the technical problem that soft colloidal impurities penetrate the filtration medium due to shear deformation is solved, and the separation precision and process operation stability of complex heterogeneous fluid systems are improved.

The invention relates to the technical field of petroleum geological exploration, in particular to an oil source or oil-oil comparison method based on asphaltene wrapped hydrocarbon protogenicity information, which comprises the following steps: extracting and purifying asphaltene components from a sample to be compared; physically separating wrapped hydrocarbons from the purified asphaltene component; carrying out specific geochemical analysis on the separated wrapped saturated hydrocarbon, and judging the effectiveness of the native information of the wrapped hydrocarbon; carrying out fine geochemical analysis on the wrapped hydrocarbon component which is judged and confirmed to be good in native information, and obtaining geochemical parameters of the wrapped hydrocarbon component; comparing the geochemical parameters of different to-be-compared samples, and judging the genetic relationship among the different to-be-compared samples according to the similarity degree of the original information in the parameters to finish oil source or oil-oil comparison. The method provided by the invention aims at oil reservoirs which are subjected to biodegradation and fail in the traditional comparison method, and ensures the fidelity and reliability of geochemical information in the whole process from sample preparation to final identification.

The invention provides a graded extraction method of soybean oil and fat, and relates to the technical field of edible oil and fat processing.The graded extraction method comprises the four steps of raw material treatment, programmed cooling crystallization, solid-liquid separation and post-extraction processing.By constructing a physical separation process based on programmed cooling crystallization, soybean oil and fat are successfully extracted, and the extraction efficiency of the soybean oil and fat is improved. Compared with the prior art, the method provided by the invention has the advantages that the conventional extensive winter working section is replaced by an accurate temperature control crystallization mode, and the use of expensive technologies such as molecular distillation and supercritical extraction or organic solvents is avoided, so that the equipment transformation cost, the subsequent energy consumption and the operation and maintenance cost are greatly reduced, and the method is suitable for industrial production. The method has the economic basis of rapid industrial popularization, the process parameters are clear and controllable, continuous and stable production from raw material pretreatment, crystallization enrichment, solid-liquid separation to product refining can be realized, efficient graded utilization of resources is realized, and the overall economic benefit of a production line is remarkably improved.

This invention belongs to the field of harmless treatment and resource utilization technology of chemical hazardous waste, and in particular, it is a treatment system for 2-mercaptobenzothiazole production waste. The system includes a vacuum drying unit, a crushing unit, and a material conveying unit, as well as a composite physical separation unit connected in series downstream of the crushing unit via the material conveying unit. The composite physical separation unit includes a wind-powered separation unit and an electrostatic separation unit connected in series. The crushing unit is used to crush the solid waste into uniform granular materials. Employing a "wind-powered + electrostatic" composite physical separation technology, the system first separates the heavy phase resin residue according to density, and then separates the sulfur and organic phases in the light phase according to dielectric properties, solving the problem of resin impurities encapsulating the effective components in traditional processes. Physical pre-separation replaces a large number of chemical dissolution and acid-base neutralization steps, effectively reducing the consumption of solvents and acid / base reagents, while also reducing energy consumption in subsequent purification stages.

The invention discloses a method for removing organic matters in raffinate and strip liquor of salt lake brine, and belongs to the technical field of salt lake lithium extraction and boron extraction processes. Aiming at the problems of low efficiency and poor adaptability of the existing single oil removal process, the invention provides a multi-stage combined process which comprises pretreatment, constant-flow type oil removal, ultrasonic or iron-carbon micro-electrolysis, resin and activated carbon adsorption advanced treatment and ultrafiltration post-treatment. By means of the synergistic effect of pH adjustment, physical separation, adsorption and electrochemical degradation, the concentration of organic matter in the high-salt brine (the salinity is 10%-30%) can be stably reduced to 5 mg / L or below, the removal rate is larger than or equal to 95%, the product whiteness is improved, and the comprehensive cost is reduced by 20%-30%. The process is flexible, secondary pollution is avoided, and reliable technical support is provided for efficient development of salt lake resources.

The application discloses a method and system for analyzing and detecting trace impurity elements in high-purity indium, and relates to the field of precise detection of trace impurities in high-purity metals. The method comprises the following steps: performing surface pretreatment on a high-purity indium sample, and assembling a masking layer with a molecular recognition function on the surface in situ; the masking layer is configured to selectively retain trace impurity elements in the structure and shield the escape of the matrix indium element; placing the indium sample piece with the masking layer in a supercritical carbon dioxide fluid, and in the presence of a carrier, converting the impurity elements captured by the masking layer into soluble chelates and selectively transferring them from the solid phase to the supercritical carbon dioxide fluid phase, thereby realizing in-situ physical separation of the indium matrix and the impurity elements. The application breaks through the technical limitations of traditional detection methods relying on chemical digestion and direct sampling detection, and constructs a new separation and detection system combining molecular recognition self-assembly masking with supercritical carbon dioxide selective extraction.

The invention provides a method for determining the oxygen isotope ratio of water in high-alcohol-content Baijiu, and relates to the field of stable isotope ratio mass spectrometry detection. The determination method comprises the following steps: diluting to-be-determined high-degree white spirit by using water with a known oxygen isotope ratio to obtain a diluted target spirit sample; performing equilibrium exchange reaction on 16O of water in the target wine sample and 18O of the carbon dioxide standard gas to obtain a reaction wine sample; measuring the oxygen isotope ratio of water in the reaction wine sample; and performing conversion to obtain the oxygen isotope ratio. According to the method, the high-degree white spirit is diluted with water with the known oxygen isotope ratio, the ethanol concentration is reduced to avoid interference of isotopic, and the original value is inversely calculated by combining the mass conservation principle. According to the method, tedious off-line physical separation is not needed, automatic analysis can be carried out by directly utilizing the on-line mass spectrometer, the operation process is greatly simplified, and the detection efficiency is remarkably improved while it is guaranteed that the result is accurate and reliable.

The invention discloses a method for removing organic matters in raffinate and strip liquor of salt lake brine, and belongs to the technical field of salt lake lithium extraction and boron extraction processes. Aiming at the problems of low efficiency and poor adaptability of the existing single oil removal process, the invention provides a multi-stage combined process which comprises pretreatment, constant-flow type oil removal, resin and activated carbon adsorption, ultrasonic or iron-carbon micro-electrolysis advanced treatment and ultrafiltration post-treatment. By means of the synergistic effect of pH adjustment, physical separation, adsorption and electrochemical degradation, the concentration of organic matter in the high-salt brine (the salinity is 10%-30%) can be stably reduced to 5 mg / L or below, the removal rate is larger than or equal to 95%, the whiteness is improved, and the comprehensive cost is reduced by 20%-30%. The process is flexible, secondary pollution is avoided, and reliable technical support is provided for efficient development of salt lake resources.

A method for pretreating and purifying raw bio-feedstocks intended for transformation processes into biofuels is described, said method being characterised in that said raw bio-feedstock is subjected, in the form of an aqueous emulsion, to a heat treatment by passing through a reactor at a temperature of 230-260°C for a contact / residence time of 1-5 minutes, the effluent leaving said reactor being subsequently subjected to at least one non-absorbent physical separation to separate said bio-feedstock from said metallic contaminants including phosphorus.

The application discloses a kind of low-grade titanium tailings green environmental protection reselection process, it is a kind of weathering or semi-weathered type ilmenite ore dressing tailings reselection full physical separation method, main steps are: field intensification, pre-screening, high-intensity magnetic separation, check classification, selective grinding, multi-physical field synergistic gravity separation.The application is aimed at weathering type ilmenite ore dressing tailings reselection method, can effectively recover valuable minerals in existing ilmenite ore dressing tailings.Titanium dioxide content in ilmenite tailings is 2.0-4.0%, and more than 80% of -74 μm, which is low-grade fine ilmenite, by ultrasonic dispersion intensification, precise adaptation of high gradient high-intensity magnetic separation equipment parameters, compound force field intensification of whole process physical field separation method, titanium dioxide grade greater than 44%, recovery rate greater than 40% of titanium concentrate is obtained, so that low-grade titanium tailings discarded in tailings is green environmental protection recycled, and the supply capacity of weathering, semi-weathered type titanium resources is greatly improved.

The application discloses a treatment process of high-chlorine material in precious metal smelting. The process mainly comprises four process stages: (1) concentration stage; (2) evaporation separation stage; (3) precious metal recovery stage; and (4) circulation stage. In the precious metal recovery process, a physical separation method is introduced to separate chlorine and precious metal ions in the material, so that the problems of large chemical agent consumption and difficult treatment of waste water under the conditions of high-concentration chlorine ions and acidity are overcome. The process not only effectively treats the waste water and recovers harmful chlorine into reusable hydrochloric acid, but also recovers valuable elements with very low concentration or even difficult to detect, obtains precious slag with high grade and easy to recover, and basically does not cause loss of precious metals. Compared with the process using adsorbents such as activated carbon and resin, the process index is more stable, and the precious metal recovery is more simple.