113results about How to "Reduce production" patented technology

The utility model relates to the technical field of building material test piece manufacturing equipment, in particular to a test piece batching tool for a proportioning test of construction waste roadbed filling soil, which comprises a frame body, a front cover, a partition plate, an unloading drawing plate, a drawing plate film and a film roller, wherein the front cover is mounted at one end of the frame body, the unloading drawing plate is mounted at the lower part of the frame body, the frame body, the front cover and the unloading drawing plate form a batching box with an upper opening, and the partition plate is mounted in the frame body and used for partitioning the space in the batching box; the material supply proportion is controlled through the partition plate, weighing operation is converted into measurement operation, the operation process is simplified, meanwhile, the installation angle and position of the partition plate are changed, continuous change of the proportion of a single test piece can be achieved, the function of testing indexes of test pieces with different proportions at different positions of the same test piece is achieved, the manufacturing amount of the test pieces is reduced, and the cost is reduced. And the efficiency of related work is improved.

The invention discloses a bidirectional sloping bench staggered combined sandwich structure which comprises an upper panel, a lower panel and a combined core arranged between the upper panel and the lower panel. The combined core body is formed by assembling an upper core body and a lower core body; the upper core body comprises an upper core plate, a plurality of inclined tables and a plurality of transverse clamping grooves, the inclined tables and the transverse clamping grooves are arranged on the upper core plate, and the inclined tables and the transverse clamping grooves are arranged on the upper core plate, inclined in the transverse direction and arranged in a staggered mode in the inclined direction. The lower core body comprises a lower core plate, a plurality of inclined tables and a plurality of longitudinal clamping grooves, the free end of the inclined table, inclining in the transverse direction, of the upper core body is connected with the longitudinal clamping groove in the corresponding position of the lower core body in an inserted mode, the inclined table, inclining in the longitudinal direction, of the lower core body is connected with the transverse clamping groove of the upper core body in an inserted mode, and a two-way staggered interlocking structure is formed. According to the invention, multidirectional balanced bearing can be realized while light weight is maintained, the modular plug-in combination design is adopted, so that assembly is facilitated, and the modular plug-in combination design can be flexibly adapted to complex curved surface configurations such as planes and cylinders.

This utility model belongs to the technical field of stamping die supports, and particularly relates to a material support with positioning and sensing functions in a multi-station stamping die, including an L-shaped positioning support, a lifting mechanism, a sensing swing block, and a sensor. The L-shaped positioning support includes a mounting part and a connecting part. One end of the mounting part is connected to one end of the connecting part. The mounting part has a mounting slot, and a mounting hole is provided at the connection between the mounting part and the connecting part. The mounting hole passes through the L-shaped positioning support along its side and communicates with the mounting slot. The mounting hole is used to mount the sensor. The sensing swing block is disposed in the mounting slot and is hinged to the mounting part. The sensing swing block rotates around its hinge point with the mounting part until its upper end extends out of the mounting slot towards the connecting part, and its lower end extends out of the mounting slot away from the connecting part. This eliminates drawing defects caused by differences in surface height, reduces space occupation, and lowers the risk of interference due to insufficient machining avoidance of multiple positioning supports.

The utility model discloses a granularity segregation prevention structure for an alumina stock bin, which comprises a stock bin body and a material guide pipe, the material guide pipe is fixedly arranged in the stock bin body, the outer wall of the material guide pipe is provided with an open pore, the material guide pipe is provided with a turning plate, and the turning plate is rotatably arranged at the port of the open pore. A baffle is arranged on the inner wall of the stock bin, the baffle is arranged in an inclined mode, and one end of the hinge is movably installed in an included angle between the baffle and the stock bin. According to the particle size segregation prevention structure for the aluminum oxide stock bin, through the cooperation of the material guide pipe and the turning plate, the flying phenomenon of aluminum oxide in the stock bin can be reduced, the particle size segregation of the aluminum oxide in the stock bin is reduced to the maximum extent, the anode effect coefficient of an electrolytic bath is greatly reduced, and the service life of the electrolytic bath is prolonged. A good feeding condition is provided for a zero anode effect production mode; and moreover, the generation amount of perfluorocarbon can be reduced, greenhouse gases are greatly reduced, and the method is green and environment-friendly.

The application discloses an artificial wetland-bioelectric Fenton coupling system, which comprises, from bottom to top, a gravel layer, a biological anode carbon felt, a wetland layer and a floating electric Fenton cathode; the biological anode carbon felt is buried in the gravel layer and the wetland layer; the floating electric Fenton cathode floats on the water surface of the wetland layer; the floating electric Fenton cathode comprises an air diffusion waterproof layer and a heterogeneous Fenton catalytic layer; the floating electric Fenton cathode floats up and down with the liquid surface, has a strong oxygen enrichment function, can cancel the aeration of a traditional Fenton reaction, simultaneously needs no additional iron salt catalyst for efficient catalytic oxidation, and increases the pH range of the Fenton reaction. The application combines the artificial wetland and the bioelectric Fenton system, utilizes the interception of the artificial wetland to easily degradable organic pollutants, provides sufficient electric energy for the electric Fenton process through the bioelectrochemical method, reduces the competition of easily degradable organic matters and PPCPs to hydroxyl radicals in the electric Fenton process, and improves the degradation efficiency of the PPCPs.

The application provides a preparation method of 3,7-dinitro-1,3,5,7-tetraazabicyclononane, comprising the following steps: 1) feeding a first material comprising urea and concentrated sulfuric acid and a second material comprising fuming nitric acid and concentrated sulfuric acid into a microchannel reactor to perform a first-stage nitration reaction, to obtain a first-stage nitration reaction liquid; 2) feeding the first-stage nitration reaction liquid into a first tubular reactor to perform a second-stage nitration reaction, to obtain a second-stage nitration reaction liquid; 3) feeding the second-stage nitration reaction liquid and water into a second tubular reactor to perform a hydrolysis reaction, to obtain a hydrolysis liquid; 4) feeding the hydrolysis liquid and a third material comprising polyoxymethylene and ammonia water into a third tubular reactor to perform a condensation cyclization reaction, to obtain 3,7-dinitro-1,3,5,7-tetraazabicyclononane. The preparation method has the advantages of high safety, less waste pollution and simple operation.

The invention belongs to the technical field of nuclear facility decommissioning, and particularly discloses an underwater laser cleaning and cutting combined machining device and a using method, cleaning and cutting are achieved through refraction and reflection of cleaning laser by scanning an X / Y-axis galvanometer set and a dichroscope and transmission of cutting laser by the dichroscope, and coaxial focusing is achieved through a common field lens; a gas-liquid coaxial composite nozzle is arranged at the bottom, and center auxiliary airflow and annular high-pressure laminar flow water can be independently regulated and controlled; millisecond-level process switching is matched, and instant cutting is carried out after cleaning is completed at the same underwater station. Aiming at the problems of low efficiency, high safety risk, more secondary pollution, poor cutting quality and the like in the decontamination and disintegration process of the high-level metal part of the nuclear power station, the invention does not generate radioactive waste liquid, effectively avoids secondary pollution, remarkably improves the cutting quality, the operation safety and the system reliability, and is suitable for green and efficient retirement operation in a high-radioactivity environment.

The present application relates to the technical field of gas outburst chemical agent, in particular to a kind of methane esterification agent for preventing gas outburst and its preparation method and application method, and the methane esterification agent includes acid, I2, manganese-containing oxidizing agent and iron catalyst, relative to acid, the amount of I2 is 0.035-0.040 mol / L, the amount of manganese-containing oxidizing agent is 0.15-0.2 mol / L, and the amount of iron catalyst is 0.1-0.2 g / 100 mL;The iron catalyst is Fe-loaded MWCNTs, and the iron loading in the iron catalyst is 36-53% of the amount of MWCNTs in terms of mass content.The methane esterification agent of the present application can effectively esterify methane, and the formula and preparation method are simple and easy to operate, and the methane esterification agent has small corrosion hazard effect.

The utility model discloses a template-free slurry pump protection plate modeling tool, and relates to the technical field of slurry pump protection plates. The device comprises a guard plate sample and two sand boxes, and is characterized by further comprising a universal bottom plate, a false box sample plate is placed on the universal bottom plate, and a spigot correspondingly matched with the guard plate sample is formed in the false box sample plate; the device further comprises a positioning pin sleeve and a positioning pin corresponding to the positioning pin sleeve. The utility model has the beneficial effects that when in use, the protection plate is modeled through the structure, and template manufacturing is omitted, so that the production cost is reduced, and the production efficiency and the product quality are improved.

A compact swing clamp device is provided which is durable and compact. A large-diameter hole (6) and a medium-diameter hole (7) are formed in a housing body (2) in series from the lower side in the axial direction. A cylindrical protruding member (3) is inserted into the large-diameter hole (6) in a sealed manner and is screwed to the housing body (2). A key member (22) is inserted between a cylindrical retainer (15) inserted into the medium-diameter hole (7) and the medium-diameter hole (7). The retainer (15) is positioned in the circumferential direction with respect to the housing body (2) by the key member (22).

The utility model relates to the technical field of excrement cleaning, in particular to an excrement backflushing system applied to a pasture. The device can reduce the use amount of flushing water and the output of sewage, is more environment-friendly, and effectively reduces the excrement cleaning cost; comprising a movable chassis, a manure scraping mechanism installed on the movable chassis, a spiral conveyor, a dehydrator, a water tank and a flushing assembly, the manure scraping mechanism is used for scraping and gathering manure on the ground to a feeding port of the spiral conveyor, the discharging end of the spiral conveyor is communicated with the feeding end of the dehydrator, and the liquid phase discharging end of the dehydrator is communicated with the interior of the water tank; the flushing assembly comprises a booster pump and a flushing pipe set, the input end of the booster pump extends into the water tank, and the output end of the booster pump communicates with the input end of the flushing pipe set; the manure scraping mechanism comprises a frame body, a swing arm installed on the frame body in a hinged mode, a scraping plate installed on the swing arm in a hinged mode, a first telescopic cylinder and a second telescopic cylinder.

A small to medium-sized incinerator includes an incinerator body, a feeding port, and a secondary combustion chamber. The lower end of the incinerator body is fixedly connected to a balance frame, and a blower is fixedly connected to the lower part of the incinerator body. The blower's air supply pipe is fixedly connected to a gas distribution pipe. In operation, waste is first fed into the feeding port and then slides down the inclined surface of the fixed grate. It sequentially passes through a dehydration and drying zone, a dry distillation zone, and a combustion zone within the primary combustion chamber. The final incinerated filter residue is transported outside the furnace body via a slag discharge system, which can be achieved using an electric conveyor belt. The flue gas inside the primary combustion chamber enters the secondary combustion chamber through the flue gas outlet for secondary combustion. Utilizing a fixed-bed incinerator structure, during normal operation, apart from necessary air input, there is no additional agitation of the waste, thus reducing fly ash generation.

The invention relates to the technical field of polishing equipment, discloses a polishing machine tool for plastic wheels of toy cars, and aims to solve the problems that the polishing time is long, molten slag scratches hubs, and the polishing quality of the plastic hubs is affected. Through the arrangement of the grinding mechanism and the discharging mechanism, the basic shaping and deburring capacity is provided through a grinding wheel, grinding particles serve as free grinding materials and are continuously bitten into a contact grinding area by two wheel bodies rotating in the same direction at different speeds, the composite effect of rolling grinding, rolling polishing and micro cutting is formed, the grinding quality is greatly improved, and meanwhile, the grinding efficiency is improved. Partial sliding friction is replaced by rolling friction, the grinding heat is greatly reduced, the generation amount of plastic slag is reduced, the influence on the grinding quality of the plastic hub is reduced, in addition, the plastic slag attached to the surface of the grinding wheel is continuously scraped by the grinding particles, self-cleaning of the grinding wheel is achieved, and the common problems that the grinding wheel is prone to sticking, the surface is gelatinized and scratched during plastic grinding are solved.

The application relates to the field of continuous dehydration systems, and discloses an industrial continuous dehydration vacuum system and a working method. The system comprises a front-stage vacuum circuit and a rear-stage vacuum circuit. Two liquid ring vacuum pumps are connected in series. The front-stage vacuum pump adopts conventional water as sealing liquid, and the rear-stage vacuum pump adopts a high-boiling-point liquid dissolved in water as working liquid. The front-stage vacuum pump provides negative pressure, and a heating source is used to remove a small amount of water in the working liquid in time, so that the vacuum degree of a production device is ensured. Meanwhile, an automatic control process scheme is adopted, so that the purpose of continuous and stable dehydration under various vacuum conditions is achieved. The continuous dehydration vacuum system provided by the application is reliable in operation, has strong adaptability to the change of water vapor content in extracted gas, produces a small amount of waste water, can meet various vacuum working conditions and continuous operation.

A multi-barrier coupled treatment process for organic complexed heavy metals in wastewater from battery cathode material production is disclosed, relating to the field of wastewater treatment. The method involves: 1. Adjusting the pH of the wastewater to 3.0-4.5; 2. Adding iron salt and peracetic acid to an oxidation reaction tank; 3. Achieving primary removal of heavy metals through neutralization and precipitation after oxidation; 4. Adjusting the pH of the wastewater back to 6.0-6.5; 5. Passing the wastewater sequentially through a primary adsorption unit and a secondary adsorption unit. This invention utilizes the low bond energy characteristics of PAA and the synergistic oxidation advantages of multiple free radicals to solve the bottleneck problems of incomplete complex breaking, large sludge production, and narrow pH application range in traditional methods. After treatment by this invention, the total nickel concentration in the effluent is less than 0.05 mg / L, and the total cobalt concentration is less than 0.02 mg / L, consistently exceeding the limits of the "Emission Standard of Pollutants for Battery Industry" (GB 30484-2013), demonstrating broad industrial application prospects.

The utility model provides a kind of LDMOS device.The LDMOS device, the recess and the convex part defined by recess have on the top surface of base, drain region is located in convex part, drift region is located in the base below recess bottom surface and part is located below drain region, the side surface of drain region is located above the top surface of drift region and the top surface of drift region is connected with the bottom surface of drain region, body region is located in the base below recess bottom surface and is located on the side of drift region away from drain region, gate structure is located in recess and covers part body region and part drift region, source region is located on the side of gate structure away from drain region, in the base below recess bottom surface and is located above body region.In this way, by setting recess on the top surface of base to raise drain region, the drain curvature effect disappears, and better surface electric field reduction effect is achieved.

This invention relates to the field of flame retardant preparation technology, and more particularly to a method for preparing an environmentally friendly and highly efficient flame-retardant polyolefin cable sheath material. The invention uses compounds containing primary amino and amide bonds and compounds containing phenyl and phosphoryl chloride groups as raw materials. The reaction is carried out at room temperature for 0.5-1 h, then heated to 45 °C for 3-4 h, and then to 65 °C for 5-6 h. Through a condensation reaction, a phosphoramide macromolecular flame retardant containing phenyl and amide bonds is obtained, with a yield as high as 80.5-95.6%. This flame retardant is added to polyolefin cable sheath material at a mass ratio of 25%, then compounded and extruded to obtain a halogen-free flame-retardant polyolefin cable sheath material. The flame retardant molecule prepared by this invention simultaneously contains phosphorus and nitrogen flame-retardant elements and amide bonds forming a char skeleton. During combustion, it can exert a phosphorus-nitrogen synergistic flame-retardant effect and promote the catalytic char formation of the matrix, which can significantly reduce the heat and toxic gas release of polyolefin cable sheath material during combustion, thereby providing protection for the lives of people in fire scenes.

The application discloses a kind of inclined arrangement tube bundle support strip expansion device and pipe penetrating method of pressurized water reactor passive residual heat removal heat exchanger, the device includes expansion pin, expansion screw, positioning groove plate, nylon top wire and butterfly nut, wherein, positioning groove plate can be fixed in tube bundle support strip expansion pin, by pre-tightening butterfly nut, the expansion screw inside expansion pin moves along the taper hole section inside expansion pin, so that the front end of expansion section is expanded, and the gap L between two adjacent tube bundle support strips is expanded;When the gap L between two tube bundle support strips is reduced after welding with the toothed plate, the installation sequence of the device can be set according to the pipe penetrating sequence, and the gap L between tube bundle support strips is expanded;In the process of expansion, expansion pin does not rub with the semicircular groove of support strip, and does not scratch tube bundle support strip, to ensure the pipe penetrating effect of heat exchange tube.

The application provides a high-temperature acidolysis device and method for uranium-containing polymetallic silicate ore, and relates to the technical field of hydrometallurgy. The device is used for high-temperature acidolysis of uranium-containing polymetallic silicate ore, the function structure of a slurry preparation tank is designed, and material is added in batches in sections, so that the risk of slurry tank overflow is reduced, and the time for slurry preparation is shortened; the reaction heat and dilution heat are used to make the material mature in the stirring tank, so that the energy consumption is reduced, and the reaction time in the subsequent high-temperature acidolysis process is shortened. The solidification of the slurry and the high-temperature acidolysis equipment are modularized and connected in series, and are carried out in the paddle stirring equipment, so that the rapid solidification of the slurry and the fine control of the high-temperature acidolysis process are realized, the technical problems of material caking and scarring in the high-temperature acidolysis are effectively solved, the energy consumption is reduced, the amount of waste gas generated in the acidolysis process is reduced, and the equipment floor area is saved.

The application discloses a kind of cold-rolled plain carbon steel wastewater recycling treatment system and process, it is related to sewage treatment process technical field, the system includes acidic wastewater treatment unit, emulsion wastewater treatment unit, leveling liquid wastewater treatment unit, alkaline oily wastewater treatment unit and wastewater recycling treatment unit, the acidic wastewater treatment unit, the emulsion wastewater treatment unit, the leveling liquid wastewater treatment unit all with the alkaline oily wastewater treatment unit be connected with, the alkaline oily wastewater treatment unit with the wastewater recycling treatment unit be connected with, etc.The acidic wastewater and alkaline oily wastewater after pretreatment are mutually neutralized in the application, save PH regulator dosage, reduce wastewater treatment reagent cost;At the same time, by combining the wastewater of different water quality after pretreatment and processing, simplify the process flow and the composition of processing facilities, reduce construction investment, operating cost and maintenance cost.

The application accords with the field of water pollution control and treatment technology, and particularly relates to a wastewater treatment device for producing left phosphorus right amine salt. The device comprises an evaporation reaction kettle, a plurality of evaporation pipes are fixedly connected to the middle part of the evaporation reaction kettle, the evaporation reaction kettle is divided into a feeding cavity, a discharging cavity and a heat exchange cavity, the evaporation reaction kettle is provided with a temperature sensor for detecting the gas in the heat exchange cavity, the evaporation reaction kettle is fixedly connected with a first push rod, the evaporation reaction kettle is slidably connected with a sliding shaft, the telescopic end of the first push rod is fixedly connected with the sliding shaft, the sliding shaft is fixedly connected with a blocking frame, and the blocking frame is used for blocking the plurality of evaporation pipes. After the high-temperature steam temperature is lower than the required value, the injection of wastewater is stopped and the plurality of evaporation pipes are blocked, so that the wastewater is accumulated in the feeding cavity, the wastewater is isolated from entering the evaporation pipes, the production amount of incompletely evaporated concentrated liquid is reduced, and the concentration of the concentrated liquid is stabilized.

This invention discloses a method and apparatus for extracting tellurium from tellurium-containing materials, comprising the steps of: mixing a sulfur-containing leaching agent with the tellurium-containing material to obtain a mixed slurry; subjecting the mixed slurry to cyclone electrolysis to obtain an anodic precipitate and a cathode product; and purifying the cathode product to obtain cathode tellurium. This invention combines selective leaching and electrowinning recovery of metallic tellurium into a single process, and utilizes the synergistic oxidation of anodic electro-oxidation and oxygen generation during electrolysis to destroy the difficult-to-leach elemental and alloy components in the tellurium-containing material, achieving one-step selective and efficient separation of tellurium-containing materials and preparation of high-purity tellurium products. By employing cyclone electrolysis to prepare cathode tellurium, this invention avoids the adverse effects of slow solution flow leading to reduced current efficiency and increased concentration polarization in traditional tellurium electrolysis, shortens the tellurium electrolysis cycle, and reduces the required concentration of impurity elements in the electrolyte, offering advantages such as high selectivity, high current density, and high product purity.

The application discloses a kind of automobile drive train Clunk impact sound analysis optimization method, comprising the following steps: S1, the NVH test data of vehicle is obtained and actual impact time, obtain the design parameter and actual structure parameter of drive train component;S2, establish drive train simulation analysis model, and calibrate drive train simulation analysis model, obtain simulation impact time according to calibrated drive train simulation analysis model;S3, whether actual impact time and simulation impact time coincide is evaluated;S4, the parameter of drive train simulation analysis model is adjusted, impact sensitivity analysis is carried out to various parameters, and theoretical optimization scheme is formulated;S5, based on theoretical optimization scheme, sample piece is made and NVH verification and effect evaluation are carried out.The application is analyzed and scheme is explored by using simulation combined with test means, reduces the sample piece production of pure test and reduces trial and error cost, greatly shortens the problem solving cycle, and more accurately solves the problem.

The present application relates to edible mushroom culture identification technical field, specifically a liquid-solid dual-phase coupling culture method of Coriolus hirsutus and application thereof in rapidly identifying correct introduction of Coriolus hirsutus.The method of the present application constructs a liquid-solid dual-phase coupling culture system, combines with sugar agar layer regulation, low-temperature stimulation, etc., realizes rapid determination of Coriolus hirsutus strain characteristics based on the obtained fruiting body, avoids introduction confusion phenomenon, and can also judge strain activity through the fruiting body state, significantly improves the efficiency and benefit of cultivation production and other links.

A method for manufacturing phosphorus pentafluoride includes a dehydration step of dehydrating hexafluorophosphate hydrate using sulfuric acid containing less than 5% by mass of sulfur trioxide. Preferably, it also includes steps a) and b). a) a step of concentrating the sulfuric acid after the dehydration step. b) a step of reusing the sulfuric acid concentrated in step a) for the dehydration of hexafluorophosphate hydrate, and then using the sulfuric acid for the manufacture of phosphorus pentafluoride. Preferably, the dehydration step is carried out in the presence of hydrogen fluoride, and step c) is included before step a). c) a step of recovering the hydrogen fluoride after the dehydration step.

This invention belongs to the field of sulfur preparation technology, specifically relating to a process for producing sulfur from sulfur dioxide. Through one or more reaction devices, at a temperature of 160-320°C, hydrogen gas introduced by a hydrogen gas stream selectively reduces SO2 introduced by a sulfur dioxide gas stream to elemental sulfur. Each reaction device includes one or more selective reduction reactors connected in series, and each selective reduction reactor contains one or more catalyst beds, each catalyst bed being filled with a selective reduction catalyst. The process of this invention is relatively simple, has a short flow rate, and high efficiency. The product other than sulfur is water or primarily water, showing promising application prospects.

The invention provides a shell structure, an electronic endoscope image processor and an assembling method, the shell structure comprises a lower shell, an upper shell and a panel, the lower shell comprises a bottom plate and first side plates connected to the two sides of the bottom plate in the width direction and perpendicular to the bottom plate, and the tops of the inner side faces of the first side plates are connected with bent plates; the panels are connected to the two ends of the lower shell in the length direction, and the end faces of the panel assembling parts make contact with the end faces of the first side plates and the end faces of the bent plates. The upper shell comprises a top plate and second side plates connected to the two sides of the top plate in the width direction and perpendicular to the top plate. The second side plate of the upper shell is in sliding fit with the assembling part of the panel in the height direction, after the upper shell slides in place, the bottom face of the second side plate makes contact with the top face of the first side plate, and the inner side face of the second side plate makes contact with the outer side face of the bent plate. On one hand, the shell structure has the advantage of being simple in structure, on the other hand, assembling among shell parts is easy to align, and rapid assembling of the shell can be achieved.

The invention belongs to the technical field of resource recovery and purification, and discloses a method for treating an acidic reaction solution in the production process of 8-hydroxyquinoline, which comprises the following steps of: producing 8-hydroxyquinoline by using hydrochloric acid instead of traditional sulfuric acid, obtaining the acidic reaction solution after the reaction is finished, and deacidifying; adding an organic solvent into the deacidified acidic reaction liquid, then adding a neutralizer to adjust the pH value, carrying out extraction, transferring 8-hydroxyquinoline into an organic phase, leaving an intermediate layer and sodium chloride brine, and carrying out filter pressing treatment on the intermediate layer; performing oil-water separation on the sodium chloride saline water, the intermediate layer pressure filtrate and the organic phase containing the 8-hydroxyquinoline through a phase separation tower; performing purification treatment on sodium chloride brine obtained by oil-water separation, performing atmospheric distillation on an organic phase obtained by oil-water separation to obtain an organic solvent, and performing reduced pressure distillation to obtain 8-hydroxyquinoline. The method has remarkable economic benefits and environmental benefits, and an efficient and feasible technical path is provided for green and sustainable development of 8-hydroxyquinoline production.

This invention provides a front-end treatment device for electroplating wastewater contaminated with heavy metals, relating to the field of electroplating wastewater technology. The device includes a first treatment chamber, a transmission chamber, a mounting rod, a permanent magnet, a connecting rod, a second treatment chamber, a connecting pipe, and a stirring assembly. This invention uses neodymium iron boron (NdFeB) permanent magnets as the core element for heavy metal adsorption. These magnets possess extremely strong magnetic adsorption properties, rapidly adsorbing magnetic heavy metal ions such as iron, nickel, and cobalt, as well as pollutants containing magnetic components, from electroplating wastewater. Simultaneously, the permanent magnets are driven by a swing assembly to oscillate reciprocally at an angle of 30–60°. Combined with the opposite polarity of adjacent permanent magnets, a dynamically changing magnetic field environment is formed. This not only expands the magnetic field coverage but also avoids the formation of adsorption saturation regions, significantly improving the capture efficiency of heavy metal ions. The titanium alloy or polyvinyl chloride corrosion-resistant protective shell on the outer surface of the permanent magnets ensures magnetic stability and extends service life, guaranteeing long-term and efficient heavy metal separation.

The application discloses a method for inhibiting leaching of impurity aluminum ions in ionic rare earth ore, and belongs to the technical field of rare earth ore mining. S1, according to the rare earth content in the ore body, a leaching agent is configured; S2, a buffer is added to the step S1 to configure a composite leaching agent; S3, the composite leaching agent in the step S2 is added to the ore body for leaching; S4, the buffer in the step S2 is configured into a buffer solution with the same pH buffering capacity as the composite leaching agent; S5, after the composite leaching agent in the step S2 is added completely, the buffer solution in the step S4 is continuously added to the ore body until the leaching is completed; the composite leaching agent containing a specific buffer is configured, the pH value of the leaching solution in the leaching process is stably controlled within the range from 4.8 to 5.4; under the pH condition, aluminum ions can form aluminum hydroxide precipitate colloid and are adsorbed in the ore body, while rare earth ions can still stably exist in the leaching solution, so that in-situ separation of the rare earth and the aluminum ions in the leaching stage is realized.