1472 results about "Resource recovery" patented technology

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The invention discloses an intelligent collaborative supporting and recycling method for residual mining of special-shaped pillars in a limited space, and belongs to the technical field of mining engineering. According to the method, an intelligent closed-loop system of sensing, decision-making, execution and feedback is constructed aiming at the problems of narrow space, complicated stress, high safety risk and the like faced by special-shaped ore pillar recovery in a limited space. The method comprises the following steps: firstly, constructing a dynamic digital twinborn model by using LiDAR and GPR fusion detection; secondly, performing stoping-supporting collaborative optimization design based on numerical simulation and an AI algorithm; then, low-disturbance blasting and micro intelligent equipment are adopted for precise subsection stoping; the mining-supporting-filling cycle operation is synchronously implemented, and an artificial key layer is quickly constructed by using a quick-setting expansion material; and finally, multi-stage intelligent early warning and dynamic regulation and control are realized through a multi-element sensor network. According to the method, the recovery rate of residual ore resources can be remarkably increased to 90% or above, ground pressure disasters are effectively controlled, and green, safe and efficient recovery of mine resources is achieved.

The invention provides equipment and a process for leaching battery-grade lithium phosphate by using waste lithium iron phosphate, and relates to the technical field of resource recovery and battery material preparation, the equipment comprises a support frame, a heating seat, a leaching tank, a driving mechanism and a discharging mechanism; the heating base is installed in the middle of the interior of the supporting frame, the leaching tank is installed on the inner wall of the heating base, an installation cover is installed on the top of the leaching tank in a sealed mode, a main material pipe and an auxiliary material pipe are installed on the two sides of the leaching tank respectively, and a discharging pipe is installed at the bottom end of the leaching tank; the driving mechanism comprises a mounting seat and a motor, the mounting seat is fixedly arranged at the inner bottom of the mounting cover, and the motor is mounted at the top of the mounting seat. According to the scheme, caked industrial-grade sodium phosphate or sodium hydroxide can be crushed into fine particles by adopting rotary grinding, and a reagent can be uniformly dispersed into a purification solution by matching with rotary dispersion blanking, so that the pH of a system and the concentration of sodium phosphate are integrally stable, local reaction abnormity is avoided, and more stable preparation of battery-grade lithium phosphate is ensured.

The invention discloses a culture tail water resource treatment system based on pearl mussels, which belongs to the technical field of aquaculture and water environment protection and comprises a culture pond, a plurality of first treatment ponds, at least one second treatment pond, a third pipeline and a control unit. Each first treatment pond is connected with the culture pond through a first pipeline, activated sludge is laid in each first treatment pond, and an aeration device and an adsorption filter with the height capable of being adjusted through a lifting mechanism are arranged on each first treatment pond. The second treatment pond is connected with the first treatment pond through a second pipeline, the interior of the second treatment pond is divided into a phycomycete symbiotic area and a water quality purification area, the water quality purification area sequentially comprises a supporting layer, an adsorption layer and a substrate layer from bottom to top, and various aquatic plants are planted in the substrate layer. The third pipeline is connected with the second treatment pond and the culture pond to form a closed water treatment circulation loop. The control unit is responsible for monitoring and regulating the operation state of the system. According to the system, efficient purification and resource recovery of aquaculture tail water are realized through multi-stage treatment and cyclic utilization.

The invention relates to a method for preparing sponge iron from laterite-nickel ore hydrometallurgy tailings, which comprises the following steps: (1) carrying out acid leaching on laterite-nickel ore hydrometallurgy tailings to obtain leached residues without at least part of CaSO4; (2) oxidizing and roasting the leaching residues obtained in the step (1), so that at least part of sulfate is discharged as sulfur-containing gas; performing hydrogen reduction to obtain a reduced material; and (3) the reduction material in the step (2) is sequentially subjected to ore grinding and magnetic separation, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained. According to the method, iron resources in the laterite-nickel ore hydrometallurgy tailings are recycled, desulfurization and reduction are carried out step by step, the desulfurization efficiency is improved, the reduction temperature is reduced, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained.

The invention relates to the technical field of industrial waste gas treatment, in particular to volatile organic compound recovery treatment equipment and method.The volatile organic compound recovery treatment equipment comprises an acquisition module, an electric field separation module, a gradient adjustment module, a dynamic compensation module, a classification optimization module, a polarization recovery module and a data processing and adaptive regulation module which are sequentially connected in series. The acquisition module captures emissions and detects parameters, and the data processing module generates a control instruction based on the parameters and drives the modules to perform classification separation and recovery; and the adaptive regulation and control module is combined with residual data of the polarization recovery module, and parameters of each module are reversely optimized through the data processing module. The device realizes accurate trapping, efficient separation and self-adaptive recovery of dynamic emission through module coordination and closed-loop regulation, improves the treatment stability and the resource recovery rate, and is suitable for industries such as chemical engineering and pharmacy.

The invention relates to the technical field of pyrolyzing furnaces, in particular to a waste photovoltaic panel recycling pyrolyzing furnace which comprises a furnace body, a plurality of liquid discharging grooves communicated with the outside of the furnace body are formed in the bottom of the furnace body, liquid discharging pipes communicated with the liquid discharging grooves are arranged outside the furnace body, and electric control valves are arranged on the liquid discharging pipes. A left lifting furnace door and a right lifting furnace door are movably arranged at openings in the two ends of the furnace body respectively, a left supporting frame and a right supporting frame which enter and exit the furnace body alternately are arranged in the furnace body, side electric heating pipes and bottom electric heating pipes are arranged on the side wall and the bottom of the furnace body, and a hot air circulation assembly extending into the furnace body is arranged on the furnace body. The top of the furnace body communicates with a smoke exhaust pipeline, the smoke exhaust pipeline communicates with a smoke return assembly, the smoke exhaust pipeline is connected with a regulation and control assembly for controlling smoke exhaust, and the side wall of the furnace body communicates with an oxygen supply pipe. Wide application prospects are realized in the technical field of pyrolyzing furnaces.

The invention relates to the technical field of precious metal recovery, in particular to a process for separating precious metal from copper-nickel smelting waste, which comprises the following steps: crushing and grading the waste, adding a sulfuric acid solution containing etidronic acid, leaching, and washing, drying and crushing filter residues to obtain a pretreated material; mixing the pretreated material with a sodium peroxide-sodium carbonate composite flux, roasting, leaching with water, and filtering to obtain a filter residue B; adding a leaching agent containing hydrochloric acid, sodium chlorate and 1, 2-cyclohexanediamine tetraacetic acid into the filter residue B according to the ratio of 1: 3-1: 5, and filtering to obtain filtrate C and filter residue C; adjusting the pH value of the filtrate C to 1.5-2.5, adding an ethanol solution of sodium N, N-diethyldithiocarbamate, precipitating, washing and calcining to obtain sponge palladium; adding ammonium chloride into the filtrate D, precipitating and calcining to obtain sponge platinum; and leaching the filter residue C by using a hydrochloric acid-chloroauric acid mixed solution containing diphenylthiourea, and replacing and calcining zinc powder to obtain crude gold. According to the process, the leaching rates of platinum, palladium and gold and the product purity are greatly improved; flux and reagent systems are optimized, consumption and energy consumption are reduced, waste liquid treatment is matched for up-to-standard discharge, and efficient resource recovery and environment-friendly cooperation are achieved.

The invention discloses a fluorine-containing organic matter wastewater treatment method, which comprises: S1, concentrating the fluorine-containing organic matter content in wastewater from 0.01-0.3 wt% to 0.3-3 wt% to obtain primary concentrated wastewater; s2, carrying out centrifugal separation by adopting hydrophilic varnished cloth, and further concentrating the content of fluorine-containing organic matters in the primary concentrated wastewater to 10-30wt% to obtain high-concentration concentrated wastewater; s3, performing high-temperature plasma cracking and incineration on the high-concentration concentrated wastewater in a plasma cracking and incineration furnace; and S4, tail gas discharged after incineration is cooled and absorbed by alkali liquor, inorganic fluoride in the tail gas is recycled, and then the tail gas is discharged. According to the treatment method, the technical bottleneck that the low-concentration fluorine-containing organic matter wastewater is difficult to directly treat by an existing plasma incineration technology is solved, operation is easy and convenient, the treatment efficiency is high, environment friendliness is achieved, and an innovative technical path is provided for harmless treatment of the low-concentration fluorine-containing organic matter wastewater and high-added-value resource recycling.

The invention discloses a recycled modified polypropylene composite material preparation system and a resource recovery method, and relates to the technical field of high polymer material science and engineering. The raw material pretreatment module adopts near infrared spectrum classification, multi-stage cleaning, drying and crushing, and the moisture content is controlled to be less than 0.5%; the melt blending module melts the materials at 180-220 DEG C, modifiers and additives are added, and vacuum degassing is performed to remove impurities; adding a reinforcing agent into the modification reinforcing module, and performing ultrasonic dispersion and dynamic vulcanization; the molding processing module is used for manufacturing a product through extrusion, injection molding or calendaring; the quality detection module is used for detecting mechanical and thermal properties; the waste recovery module is used for crushing and melting granulation to realize a closed loop; the intelligent control module uses a PLC to coordinate each module. Integrated treatment of waste polypropylene is achieved, the purity of raw materials and the performance of a composite material are improved, the resource utilization rate is increased through closed-loop recycling, manual intervention is reduced through intelligent control, product stability is guaranteed, economic and environment-friendly benefits are achieved, and high-valued circulation of waste plastic is promoted.

The invention belongs to the technical field of industrial wastewater treatment and resource recovery, and particularly relates to an enhanced treatment method for recovering fluorine resources in semiconductor processing fluorine-containing wastewater. And step-by-step efficient recovery of sodium fluosilicate and calcium fluoride is realized through cooperation of precipitant compounding and pH regulation. The method comprises the following steps: firstly, adding a NaCl-NaHCO3 composite precipitator and sodium fluosilicate seed crystals to induce crystallization and recover hexagonal prism-shaped sodium fluosilicate single crystals; and after filtering, adding a CaCl2-Ca (OH) 2 composite precipitator and calcium fluoride seed crystals into the filtrate to generate large-particle calcium fluoride. And the impurity content in the recovered product respectively reaches the industrial sodium fluosilicate superior product standard and the metallurgical grade calcium fluoride secondary product standard. And the treated wastewater is neutral or weakly alkaline, so that the subsequent mixed treatment with other wastewater is facilitated.

The invention relates to an intelligent ore rock lumpiness distribution regulation and control system based on deep learning. The system comprises a display terminal; the intelligent ore rock lumpiness distribution regulation and control method based on deep learning is achieved when the at least one processor is configured to execute a computer program, and the method comprises the following specific steps that historical lumpiness regulation and control and geological data of a target area are collected, and a spatial-temporal feature data set is constructed; inputting the spatio-temporal feature data set into a preset adaptive double-branch deep learning model, and outputting a future preset time period block prediction curve; integrating the prediction curve and the real-time ore drawing data according to a preset weighting algorithm, and outputting a comprehensive regulation and control reference value; comparing the comprehensive regulation and control reference value with a preset lumpiness control threshold value in real time, and if the predicted lumpiness rate exceeds the threshold value, dynamically correcting the parameters; and if not, maintaining the current parameter. The method has the following effects that the rock lumpiness of the metal mine is accurately predicted, parameters are dynamically regulated and controlled in real time, the lumpiness is guaranteed to be compliant, the cost is reduced, and the resource recovery efficiency is improved.

The invention relates to the technical field of wastewater treatment and resource recovery, and discloses an organophosphorus degradation and recovery system based on double-cathode electro-Fenton reaction, comprising: an electrolytic tank for accommodating organophosphorus wastewater to be treated; the anode is arranged in the electrolytic tank and is electrically connected with an anode of a power supply; the oxidizing agent generating cathode is arranged in the electrolytic tank and is used for generating hydrogen peroxide in situ under a power-on condition; the metal reduction cathode is arranged in the electrolytic tank and is used for adsorbing and reducing ferric ions; the metal source is composed of zero-valent iron or iron alloy, is not directly and electrically connected with the power source, and is arranged in an electric field acting area established by the anode and the at least one cathode. Through the design of inductive slow-release iron supply and double-cathode collaborative circulation, a series of problems of uncontrollable iron ion release, high iron sludge yield, low catalyst utilization efficiency, difficulty in resource recovery and the like in the traditional electro-Fenton technology are effectively solved.

The invention relates to the technical field of wet-process phosphoric acid, and discloses a wet-process phosphoric acid grading and arsenic removal treatment method and system, and the system can be switched between a parallel grading treatment mode and a series depth treatment mode through flow control; in the parallel mode, the two arsenic removal reaction tanks operate independently to respectively treat different raw materials and produce desulfurized acid for industrial monoammonium and low-arsenic dilute phosphoric acid for high-phosphorus compound fertilizer, the low-arsenic dilute phosphoric acid is mixed and blended with untreated dilute acid and then concentrated, qualified products are obtained with the minimum treatment capacity, and the cost is remarkably reduced; in the series connection mode, raw materials sequentially flow through the two tanks to be deeply purified, and single high-quality phosphoric acid is produced; the two modes are both integrated with efficient filter pressing units, solid-liquid separation is carried out on arsenic-containing thick slurry generated by arsenic removal, and phosphorus resource recovery and arsenic pollution control are achieved; the device has production flexibility and deep purification capacity, perfectly meets the requirements of raw material fluctuation and multiple products, and thoroughly solves the problem of arsenic slag disposal.

The invention relates to a high-temperature acidolysis reaction defluorination method, and belongs to the technical field of phosphorus chemical resource recycling. The technical problem to be solved by the invention is to provide a high-temperature acidolysis reaction defluorination method which is simple to operate and high in defluorination rate. According to the method, phosphorite powder / white fertilizer is subjected to high-temperature acidolysis, fluoride in the phosphorite powder / white fertilizer reacts with strong acid, fluorine is separated from a reaction system in a gas form, and hydrofluoric acid is obtained through condensation. The method is simple, is simple and convenient to operate, and is easy to realize technologized large-scale production. Meanwhile, due to the destructive effect of the strong acid on the lattice structure of the phosphorus-calcium compound, citrate-soluble phosphorus can be converted into soluble phosphate, subsequent phosphorus recovery is facilitated, comprehensive utilization of phosphorite and elimination of white fertilizer output are achieved, meanwhile, the problems of material accumulation and resource waste of enterprises are solved, and the method conforms to the circular economy concept of green development.

The invention provides a method and a system for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis, and application of the method and the system, and relates to the technical field of environmental governance and resource recovery, in particular to the method for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis. Comprising the following steps: (a) performing electrochemical catalytic oxidation treatment on sludge slurry; (b) pyrolyzing the sludge treated in the step (a) to obtain volatile components; and (c) converting the volatile component into nano silicon dioxide through a vapor deposition reaction. According to the electrochemical-ozone catalysis synergistic enhanced sludge treatment and nano material co-production method provided by the invention, electrochemical catalytic oxidation, pyrolysis and vapor deposition processes are organically integrated, so that efficient removal of pollutants in sludge and synchronous conversion of high-value nano materials are realized.

The invention discloses a method for intensifying fluorine removal by using sludge phosphorus-rich liquid, relates to the technical field of wastewater treatment and resource recovery, and solves the technical problems of difficulty in advanced treatment of high-fluorine wastewater, low utilization efficiency of excess sludge resources and lack of cooperative treatment of the high-fluorine wastewater and the excess sludge resources at present. According to the technical scheme, the method is characterized in that pretreated excess sludge supernate of an urban sewage treatment plant is introduced to serve as an effective phosphorus source and an organic carbon source to participate in a high-fluorine wastewater treatment reaction, generation of fluorapatite is promoted, the fluorine removal efficiency is remarkably improved, and meanwhile phosphorus and carbon resources are recycled. Compared with a traditional defluorination process, high-cost equipment does not need to be newly added, the method has the advantages of being high in process integration, high in resource utilization efficiency and remarkable in economical efficiency and environmental benefits, and an effective solution path is provided for standard treatment of high-fluorine wastewater and resource utilization of sludge.

The invention discloses a raw ore mineral parameter-based tailing index dynamic prediction method, which comprises the following steps of: establishing a quantitative correlation model of mineral parameters and tailing indexes according to the grade alpha of a target element in a raw ore, the weight content W of a target mineral, the content D of the target element in the target mineral and the dissociation degree under a certain fineness condition; based on the model, tailing indexes corresponding to different intergrowth types can be predicted in real time, a traditional laboratory multi-round verification test is replaced, reagent consumption is reduced, and the test period is shortened. And meanwhile, optimal ore dressing process parameters are reversely deduced by setting an environmental protection threshold value, collaborative optimization of the resource recovery rate and environmental protection compliance is achieved, and the technical problems of resource waste and excessive emission in a traditional ore dressing process are solved.

The invention relates to the technical field of fermentation industrial wastewater treatment, and particularly discloses a white spirit production wastewater treatment process and system. The system comprises a pretreatment unit, an anaerobic treatment unit, a denitrification unit, a multi-stage biochemical treatment unit, an advanced treatment unit, a sludge treatment unit and a backwashing water recovery unit which are connected through a corrosion-resistant pipeline, a variable frequency pump body and a control valve group. The method comprises the following steps: homogenizing water quality and water quantity through an adjusting tank, adjusting the pH value through a neutralizing tank, pretreating through a microfilter and an air flotation device, sequentially feeding into a hydrolysis acidification tank and a two-stage UASB reactor to degrade organic matters, reducing nitrogen concentration through a denitrification unit, deeply degrading pollutants through a multi-stage biochemical system, and finally realizing up-to-standard discharge through magnetic coagulation phosphorus removal and decoloration treatment. The sludge is subjected to resource utilization after being concentrated and dehydrated, and backwashing water and filtrate are recycled and retreated. The system is high in treatment efficiency, low in operation cost, high in resource recovery rate, stable in effluent and suitable for wastewater treatment of various white spirit production enterprises.

The invention discloses a method for leaching waste lithium battery positive electrode powder by using intestinal flora in a neutral environment, and belongs to the technical field of resource recycling, the method comprises the following steps: step 1, a pretreatment link, the pretreatment link comprises the following process links, and each link has no sequence: (1) preparation of battery powder, (2) acquisition of intestinal flora, and (3) preparation of a culture medium; 2, domesticating the flora; and 3, valuable metal in the waste battery powder is leached out. According to the method, the intestinal flora is applied to the biological leaching of the waste LIBs positive electrode powder, so that the dependence of traditional strong acidophilic bacteria on an extremely low pH condition is broken through, and the environmental harm is greatly reduced; according to the method, inorganic acid does not need to be added, the pH value of a reaction system is stabilized within the nearly neutral range of 7.8-8.2, equipment loss caused by acid etching is reduced, reagent consumption for subsequent metal recovery and neutralization treatment is reduced, and remarkable economic benefits and environmental benefits are achieved.

The invention belongs to the technical field of coal chemical industry grey water treatment, and particularly relates to an advanced treatment method and system for coal chemical industry grey water circulating water. The method integrates pretreatment, complexing cracking, fractional crystallization and deep deamination, and is characterized in that a chelating structure of an organic phosphorus dispersing agent and calcium and magnesium ions is thoroughly destroyed through an advanced reduction-advanced oxidation combined process, target ions are released, and the core problems that hardness removal is hindered and phosphorus pollution is caused are solved; then, calcium and magnesium are respectively converted into calcium carbonate and magnesium ammonium phosphate particles for resource recovery by utilizing a secondary crystallization technology, so that the bottlenecks of high alkali liquor consumption and salt accumulation of a traditional high-pH magnesium ion precipitation method are broken through; and finally, the residual ammonia nitrogen is deeply removed by adopting a pollution-resistant PTFE hydrophobic membrane, so that the residual ammonia nitrogen is efficiently and stably removed, and the problem that a traditional polypropylene material membrane system is easy to pollute and block, easy to oxidize and difficult to apply to the field is solved.

The invention provides a method for recovering rhodium in organic residual liquid containing triphenylphosphine / phosphine oxide, and relates to the technical field of precious metal recovery, and the method comprises the following steps: S1, carrying out reduced pressure rectification on the organic residual liquid containing triphenylphosphine / phosphine oxide to remove volatile components until the indexes of the residual liquid meet the feeding requirements of a subsequent process, and collecting light components for independent storage; s2, adding an acidic medium into the organic phase after light component removal, stirring and heating, introducing an oxidizing agent to carry out oxidation-complexation reaction, maintaining reaction conditions until the reaction is complete, standing for phase splitting, and collecting a water phase containing rhodium complex ions; according to the method, a core process combining oxidation-chlorination transfer and anion exchange adsorption is adopted, and key parameters of each process are accurately controlled, so that the rhodium recovery rate is stabilized at 95% or above, the rhodium content in the residual liquid can be reduced to 5 ppm or below, the industrial emission standard is completely met, and compared with the prior art, the resource recovery efficiency is greatly improved, and the cost is reduced. And waste of precious metal resources is effectively reduced.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The invention relates to the technical field of water treatment and resource recovery, in particular to a high-iron-content acid mine water treatment and recycling method based on immobilized biological oxidation and fractional precipitation, which comprises the following steps: S1, a bacterial immobilization stage; s2, an immobilized biological oxidation stage; and S3, a fractional precipitation stage. The method is high and stable in treatment efficiency, bacteria are firmly fixed on a carrier by adopting a bacteria immobilization technology, the loss of the bacteria is avoided, and the biomass and the metabolic activity are improved; waste recycling is achieved, the sludge yield is low, secondary pollution is avoided, the technology is coupled and innovated, and the reactor is reasonable and efficient in design.

The invention relates to the technical field of wastewater treatment, in particular to a micro-plastic removal and recovery method and system based on magnetic adsorption-dissociation. The method comprises the following steps: S1, magnetic adsorption agglomeration; S2, magnetic separation; and S3, dissociation and recovery. The system comprises a raw water tank, a magnetic seed adding unit internally provided with a magnetic seed storage tank, a mixing reactor, a magnetic separator, a dissociation regeneration tank and a secondary magnetic separator which are connected in sequence, the method disclosed by the invention has high-efficiency removal capability on micro-plastics under different water quality conditions, regeneration cycle performance of magnetic seeds and adaptability and stability to complex water bodies, and the technology has remarkable advantages in the aspects of deep removal of the micro-plastics and resource recovery.

The invention relates to the technical field of rare earth secondary resource recovery and chemical metallurgy, in particular to a method for roasting and recovering rare earth in neodymium iron boron waste. The invention discloses a method for roasting and recovering rare earth in neodymium iron boron waste. The method comprises the following steps: mixing materials; performing flash chlorination roasting; quenching and leaching; and recovering iron. According to the method, the neodymium-iron-boron waste is finely ground and then fully mixed with zinc chloride powder, zinc chloride is rapidly melted at the reaction temperature of 350-550 DEG C, high-activity ZnCl liquid drops and HCl gas are generated, the ZnCl liquid drops and the HCl gas are subjected to instantaneous and violent gas-solid-liquid-solid reaction with waste particles in a suspended state, rare earth elements are efficiently converted into water-soluble rare earth chlorides, and the rare earth chlorides are recycled. The rare earth and the iron are basically converted into magnetic oxide insoluble in water, efficient separation of the rare earth and the iron can be achieved through simple hot water leaching, a pure rare earth chloride solution and high-grade iron ore concentrate are obtained, the technological process is extremely short, the reaction efficiency is high, and the rare earth recovery rate and the selectivity are both good.

The invention relates to the technical field of resource recovery, and provides a novel method for efficiently extracting gold. The method provided by the invention comprises the following steps: mixing tridecane and a gold-containing solution, forming micro-droplets under the ultrasonic action, and extracting Au (III) in the gold-containing solution. Au (III) in water is reduced through superoxide free radicals and electrons generated on the micro-liquid drop-oil interface under the ultrasonic action to generate Au (0) precipitates, and therefore efficient extraction of Au (III) is achieved. The method provided by the invention only needs to use commercially available tridecane and ultrasound as unique energy sources, and has the remarkable advantages of simplicity and convenience in operation, low cost and no secondary pollution. Results of the embodiment show that the method provided by the invention has a good removal effect on gold-containing solutions with the concentration of 0.01-1 mM and the pH value of 1-10, and the removal rate of gold can reach 95% or above.

The invention discloses an electroplating sludge iron resource recovery method based on acid leaching-resin selective adsorption, and relates to the field of dangerous solid waste resource treatment.The electroplating sludge iron resource recovery method comprises the following steps that S1, collected electroplating sludge and sodium salt are evenly mixed, roasted, cooled, washed and filtered, and washing liquid and filter residues are obtained; s2, adding water into the filter residues obtained in the S1, uniformly mixing, then mixing with an acid solution, carrying out an acid leaching reaction, and carrying out solid-liquid separation to obtain an acid leaching solution; according to the electroplating sludge iron resource recycling method based on acid leaching-resin selective adsorption, selected specific chelating resin is large in iron ion adsorption capacity and excellent in selectivity under the low pH, competitive interference of coexisting ions such as Cu < 2 + > can be effectively overcome, and the iron recycling rate can reach 99% or above; the adsorption step is carried out under the strong acidic condition and is matched with the characteristics of the electroplating sludge pickle liquor, the pH does not need to be greatly adjusted, the process is simplified, and the cost is reduced.

The invention relates to the technical field of waste resource recycling and automatic processing, and discloses a waste household appliance disassembling process parameter adaptive control method and system, and the method comprises the steps: carrying out the registration fusion of multi-view surface data, and obtaining a complete point cloud model; identifying a high-deformation area based on curvature features and fitting cutting reference surface parameters; performing smooth adjustment on the reference plane parameters according to the pose difference of the adjacent areas to obtain a coordinated reference plane set; generating an initial compensation vector in combination with the discrete points of the cutting path, and correcting direction mutation to obtain a preliminary compensation instruction; and real-time cutting feedback data are collected in the disassembling process, if the machining state is abnormal, the compensation vector of the follow-up path is corrected, and a target self-adaptive control instruction is obtained. According to the invention, self-adaptive precise cutting of waste household appliance parts with complex deformation and uneven material characteristics can be realized.

The invention relates to the technical field of aluminum ash recycling digital twinning, and discloses an aluminum ash recycling treatment method based on a high-aluminum material. According to the method, a digital twinborn body in a processing process is constructed, and a virtual probe array corresponding to a key reaction site of a real device is set in the digital twinborn body, so that dynamic evolution information of aluminum ash processing is continuously captured. An evolution chain of a physical field and a material flow is constructed based on the information, then a processing path is deduced reversely, and key evolution nodes and constraint conditions are identified. The nodes and conditions are converted into a control strategy set, and a real processing system is driven to execute closed-loop regulation and control. According to the method, deep perspective of the internal evolution mechanism in the aluminum ash treatment process is achieved, accurate regulation and control are achieved based on causal analysis, and the stability and the resource recovery rate of the treatment process are improved.