50 results about "Liquid copper" patented technology

The utility model relates to the technical field of printed circuit boards, and discloses circuit board micro-etching waste liquid copper recovery equipment which comprises an electrolytic tank, a top plate fixedly connected to the top of the electrolytic tank, a cover plate arranged on one side of the top of the top plate, a positive plate fixedly connected to the middle of the bottom of the top plate, and a support fixedly connected to the other end of the top of the electrolytic tank. The tops of the two supports are fixedly connected with the same cross plate, the two sides of the bottom of the cross plate are fixedly connected with sliding rods, the bottoms of the two sliding rods are fixedly connected to the top of the top plate, the circumferential surfaces of the two sliding rods are slidably connected with the same T-shaped plate, the two ends of the T-shaped plate are provided with round holes matched with the sliding rods, and the bottom of the T-shaped plate is fixedly connected with a negative plate. The device has the technical effects that a user does not need to manually and frequently collect copper on the negative plate, the device can automatically collect the copper, the labor intensity of the user is reduced, and the working efficiency of copper recovery is improved.

The invention discloses a bimetallic sliding bearing and an additive preparation method thereof. The preparation method comprises the following steps: surfacing a welding wire A and a welding wire B on the surface of a steel substrate in a double-wire welding alternate arcing manner; during alternate arcing, the welding wire A is melted firstly, then the welding wire B is melted, the welding wire A and the welding wire B are arranged in an inclined and crossed mode, and the center lines of the two welding wires are focused on the same point of the surface of the steel base body; the welding wire A comprises any one of a pure tin wire, a tin-nickel alloy wire and a nickel-tin plated welding wire; and the welding wire B comprises a pure copper wire or a copper alloy wire. Two molten pools are mixed by controlling double-wire components, wire feeding angles and welding parameters, so that in-situ synthesis of high-tin bronze is realized, and the problem that the high-tin bronze welding wire is difficult to prepare is solved; an iron-tin phase formed by the tin-melting welding wire firstly can effectively prevent liquid copper from permeating into a carbon steel substrate, and permeation cracks can be reduced or avoided; and a variable polarity technology is introduced, so that the heat input of a matrix is greatly reduced, the propagation of permeation cracks is inhibited, and the bonding strength of heterogeneous additive materials is improved.

A method for removing organobromine compound and refining copper from a recycled material containing copper and an organobromine compound includes the steps of: subjecting the recycled material containing the copper and the organobromine compound to low-temperature pyrolysis to recover hydrogen bromide and a crude copper powder; subjecting the hydrogen bromide to a reaction with a metal oxide to form an inorganic compound; subjecting the crude copper powder to a melting treatment to recover a molten mixture containing liquid copper and impurities; and adding a refining agent to the molten mixture to allow the impurities in the molten mixture and the refining agent to form a slag phase layer, followed by removing the slag phase layer, thereby recovering the liquid copper.

The invention relates to the technical field of non-ferrous metallurgy, and discloses a processing technology of an oxygen-free copper pipe for a magnetic control anode cylinder, which comprises the following steps: selecting a copper ingot with the copper content of 99.97%-100% as a raw material, putting the copper ingot into a vacuum electric furnace, heating and melting to form a copper liquid, extruding the smelted copper liquid into a copper pipe blank by using a pressurizing machine, and carrying out heat treatment on the copper pipe blank to obtain the oxygen-free copper pipe for the magnetic control anode cylinder. The method comprises the following steps: placing a copper pipe blank at an inlet of a two-roller Picker mill, carrying out primary rolling by using the two-roller Picker mill, carrying out annealing, solution treatment and aging treatment on the rolled copper pipe, cutting the copper pipe by adopting a chipless sawing technology according to requirements, cleaning the cut copper pipe, and bending the copper pipe by using a pipe bending machine according to the required bending degree, according to the method, the bent copper pipe is subjected to surface treatment of polishing and sand blasting, and whole-course intelligent online quality monitoring is implemented in the production process, including quality detection and regular sampling detection by an online detector, drying treatment by a drying oven, and size detection, mechanical property test and appearance inspection on the finished copper pipe.

The invention provides an acid etching line etching cylinder tail gas treatment system and a treatment device, and particularly relates to the technical field of etching line tail gas treatment.The acid etching line etching cylinder tail gas treatment system comprises an etching cylinder and an air draft assembly used for extracting tail gas in the etching cylinder; the absorption assembly is used for absorbing effective components in tail gas, the storage assembly is used for storing absorption liquid, the monitoring assembly is used for monitoring the state of the absorption liquid, the blending assembly is used for blending the absorption liquid, and the recycling assembly is used for returning the processed absorption liquid to the etching cylinder. A complete closed-loop system is formed by the monitoring assembly, the blending assembly and the recycling assembly, low-copper electrolyte of the etching liquid copper recovery system is used for replacing traditional alkali liquor to absorb tail gas, the defects that effective components are wasted, alkali liquor consumption is large and chlorine-containing waste water is additionally generated due to the fact that tail gas is directly discharged in a traditional process are overcome, and recycling of the effective components in the tail gas is achieved. Meanwhile, the consumption of alkali liquor and the discharge amount of chlorine-containing wastewater are reduced.

The application provides a copper-molybdenum smelting slag multi-metal collaborative recovery method based on composite conditioning and external field strengthening, and relates to the field of comprehensive utilization of non-ferrous metal secondary resources. The method comprises the following steps: mixing liquid copper-molybdenum slag and a composite conditioning agent to obtain a mixture; in low-frequency alternating electromagnetic field strengthening treatment, the mixture is subjected to smelting reaction to obtain flue gas, molten slag and matte phase droplets; the matte phase droplets are cooled and ground to obtain ground matte phase; under alkaline conditions, a'mixed roughing- asynchronous separation' process is adopted, the ground matte phase and a collector are mixed for roughing to obtain copper-molybdenum mixed rough concentrate; the copper-molybdenum mixed rough concentrate and an inhibitor are mixed for cleaning to obtain copper concentrate and molybdenum concentrate, and finally, the copper recovery rate is greater than or equal to 92%, the molybdenum recovery rate is greater than or equal to 95%, and the smelting slag is deeply depleted and harmlessly disposed.

This application belongs to the field of non-ferrous metal metallurgy and resource comprehensive utilization technology, and more specifically, relates to a method and system for air quenching liquid copper smelting slag based on heat preservation and slow cooling. This application uses compressed air or compressed waste nitrogen to air quench liquid copper smelting slag that has undergone heat preservation and slow cooling to achieve copper particle agglomeration and growth. This significantly shortens the processing time and achieves centralized and efficient recovery of waste heat. Simultaneously, it reduces the amount of slag bag used and the required site area. Furthermore, the copper slag particles obtained from air quenching are small in size and the copper-containing particles are fully grown, eliminating the need for multi-stage crushing processes. After ball milling, it can be used for mineral processing and recovery, significantly shortening the mineral processing flow and reducing the difficulty of mineral processing.

The utility model discloses a kind of liquid cooling charging cable, charging gun and charging pile, by including quilt, positive liquid copper tube, negative liquid copper tube, independent pipe and at least one auxiliary cooling pipe, since at least one auxiliary cooling pipe is arranged in the inner cavity of liquid cooling charging cable, and it is in structure respectively with the outer surface of positive liquid copper tube, negative liquid copper tube and independent pipe Contact abutment, to build out multiple path parallel cooling structure, increase the cross-sectional area of cooling liquid flow passage, reduce the flow resistance of liquid cooling gun internal cooling pipe, to improve cooling liquid flow, finally improve liquid cooling heat dissipation effect. That is, in the technical scheme of the application, the auxiliary cooling pipe serves as an independent cooling path (indirect cooling method), and cooperates with the main cooling flow channel (direct cooling method of the positive and negative liquid copper tube). The heat in the high-current channel of the cable can be shared, the unit cross-sectional heat density is effectively reduced, the heat dissipation uniformity is enhanced, and the stability is higher in high-power scenarios.

The invention discloses red copper continuous casting crystallizer equipment with a dynamic cooling adjustment function, and relates to the technical field of red copper continuous casting, the red copper continuous casting crystallizer equipment comprises a shell, a flow guide unit, a cooling unit, an anti-adhesion unit and a guide unit, the shell is used for installing and fixing the flow guide unit, the cooling unit, the anti-adhesion unit and the guide unit, and the flow guide unit is used for guiding liquid copper water. The cooling unit is used for cooling and solidifying liquid molten copper, the cooling process of the red copper is prevented from being dynamically adjusted at the same time, and the cooling effect is guaranteed; the anti-adhesion unit is used for avoiding adhesion in the cooling and solidifying process of the molten copper; the guiding unit is used for pulling out the formed red copper; after the liquid-state high-temperature copper water is cooled through the cooling unit, the red copper is prevented from being adhered to the inner wall through the anti-adhesion unit, and the formed red copper is supported and guided to the next procedure through the vagina unit.

The invention relates to a three-layer composite material with liquid copper as a core material and a production process and application thereof.The production process comprises the following steps that a rolling mill is started to enable two strips to pass through a roll gap, each strip comprises an outer wall facing the rolling mill and an inner wall opposite to one side of the rolling mill, the inner walls of the two strips are both covered with copper layers, and the copper layers are arranged between the outer walls and the inner walls; liquid copper is poured between the inner walls of the two strips through a casting nozzle, the liquid copper is cast-rolled and compounded through the rolling mill along with the strips to form the three-layer composite material, and the liquid copper is pure copper or copper alloy. According to the scheme, the defects of shrinkage cavities, shrinkage porosity and the like formed on the bonding surface can be avoided, so that the interface bonding strength and the heat conductivity coefficient are better; and meanwhile, generation of continuous brittle intermetallic compounds is inhibited, so that the brittle intermetallic compounds are uniformly dispersed on a bonding surface, and the bonding strength and toughness of the composite material are improved through crack deflection and a bridging mechanism.

The present invention relates to an ultra-high purity oxygen-free copper, and a preparation method therefor. In the preparation method, first, cathode copper is added to a graphite crucible of an electric vacuum high-temperature purification furnace, to be melted into liquid copper; next, after the liquid copper is left to stand and maintain temperature, a heating cover of the electric vacuum high-temperature purification furnace is slowly lifted upwards, and the liquid copper in the graphite crucible slowly solidifies from the bottom until the solution is completely solidified; then, the solidified ingot is removed, both ends of the ingot are cut off, and the ingot remaining after cutting repeats the previous two steps. After 3-5 cycles, an ultra-high purity oxygen-free copper ingot is obtained. The prepared ultra-high purity oxygen-free copper has a purity of 5N-6N, an oxygen content of less than 2 ppm, and a hydrogen content of less than 1 ppm. The present invention has simple and reliable operation, and can control preparation of ingots having different copper contents according to different application directions; in addition, due to the extremely low gas content and good compactness of the ingots, the oxygen content is also controlled at an extremely low level.

The application relates to the technical field of metal plate composite technology and discloses a preparation process of a Kovar alloy-copper composite plate, which comprises the following steps: a preparation process of an Invar alloy-copper composite plate, which comprises the following steps: s1, taking one Invar alloy plate and two copper plates; s2, immersing the Invar alloy plate into liquid copper after the Invar alloy plate is heated to 250-300 DEG C; s3, positioning the two copper plates and the Invar alloy plate to form a group of initial composite plate materials; s4, heating the whole in a heating furnace, the heating temperature is 700-850 DEG C, and the heating time is 20-40 min; s5, taking out and cooling to 500-650 DEG C, and then performing hot rolling; s6, performing stress relieving annealing on the composite blank; s7, naturally cooling to normal temperature after annealing, and cold rolling to form an Invar alloy-copper composite plate with a preset thickness. The Invar alloy-copper composite plate prepared through the process is more stable and not easy to separate between the plates, the composite plate has the physical properties of the Kovar alloy and good thermal conductivity.

The invention belongs to the technical field of piston shoe preparation, and particularly relates to a low-cost preparation method of a copper-steel composite bimetal piston shoe blank for a high-pressure plunger pump. According to the method, the characteristic that the melting point of copper alloy is lower than that of a steel base material is utilized, a steel material is machined into a sliding shoe base blank with a cavity, then a prefabricated copper alloy blank is loaded into an inner cavity of the steel base blank, and a layer of protective borax covers the inner cavity of the steel base blank; heating in an inert atmosphere protection resistance heating furnace or a reducing atmosphere protection resistance heating furnace to melt the copper alloy into a liquid state, preserving heat for a certain time in a high-temperature environment to infiltrate and diffuse the liquid-state copper alloy to the surface of the solid-state steel base, and then discharging and cooling to solidify the copper alloy in the cavity; and finally, a metallurgically bonded copper-steel bimetal composite sliding shoe blank is prepared.

The present application relates to a kind of liquid copper as core material three-layer composite and its production process and its application, production process includes the following steps: start rolling mill and make two strip materials pass through roll gap, the strip material includes the inner wall of outer wall facing the rolling mill and the inner wall of the side opposite to the rolling mill, the inner wall of two strip materials is covered with copper layer, liquid copper is casted between the inner wall of two strip materials by casting nozzle, liquid copper is cast-rolled composite with the strip material through the rolling mill to form the three-layer composite, and the liquid copper is pure copper or copper alloy.The scheme can avoid the formation of shrinkage and shrinkage and other defects in the bonding surface, so it has better interface bonding strength and thermal conductivity coefficient;Continuous brittle intermetallic compound is inhibited to be generated, so that brittle intermetallic compound is uniformly dispersed in the bonding surface, and the bonding strength and toughness of the composite material are improved by crack deflection and bridging mechanism.

The invention discloses a device and method for achieving copper-steel-copper coated alloy in-situ manufacturing one-time forming through solidification process control, and belongs to the field of electric arc additive manufacturing. An MIG welding gun is used as a main body frame, and a coaxial powder feeding and auxiliary heat source regulation and control device is innovatively integrated. A center channel adopts a Fe-based welding wire as a structural framework material, a powder feeder near the welding wire accurately conveys Cu-based powder through argon to serve as a functional coating layer, and a gas protection system is arranged on the outermost layer to avoid interference of shielding gas turbulence on a copper powder conveying track. Meanwhile, a TIG heat source rear dynamic temperature adjusting technology is introduced. After the MIG main electric arc completes material cladding, secondary thermal field intervention is carried out on a deposition layer through the rear TIG electric arc, and sufficient dynamic conditions are provided for Cu liquid phase migration. According to the method, liquid copper is ensured to be fully migrated to the two sides of a molten pool under the driving of surface tension and Marangoni convection, a gradient coating structure with the uniform thickness is formed, and the microhardness of an interface area is improved.

The utility model relates to the technical field of copper electroplating waste liquid recovery, in particular to a copper electroplating waste liquid copper sulfate recovery device which comprises a copper sulfate electroplating bath, a temporary storage tank, a heat exchanger, a factory service end ice water machine, a separator, a crystal collecting tank and a volatilization air exhaust dryer. An outlet of the copper sulfate electroplating tank is communicated with an inlet of the temporary storage tank, an outlet of the temporary storage tank is connected with an inlet of the heat exchanger, the heat exchanger is communicated with the factory service end water chiller, cold water of the factory service end water chiller circulates in the heat exchanger, and a filter screen is arranged at the bottom of the heat exchanger and communicated with the dilute waste liquid collecting tank. The copper electroplating wastewater discharge is improved, copper sulfate is separated out and purified through low-temperature crystallization and collected, waste liquid reduction and resource recovery are achieved, the environmental protection effect is optimized, meanwhile, a novel copper sulfate pentahydrate on-line auxiliary recovery process is constructed, simple recovery equipment is additionally arranged on the basis of the original copper electroplating process, and the copper electroplating wastewater is recycled. A waste reduction target can be achieved by invested a small amount of money, and the environment-friendly wastewater treatment cost is greatly reduced.

The application discloses a device and method for realizing in-situ manufacturing of one-time forming of copper-steel-copper clad alloy through solidification process control, and belongs to the field of electric arc additive manufacturing. The device is mainly composed of a MIG welding gun, and a coaxial powder feeding and auxiliary heat source regulating device are innovatively integrated. Fe-based welding wire is used as a structural skeleton material in the central channel, and a powder feeder near the welding wire precisely delivers Cu-based powder as a functional cladding layer through argon. The outermost layer is a gas protection system, which avoids the interference of protective gas turbulence on the transport track of copper powder. Meanwhile, a TIG heat source is introduced to realize a rear dynamic temperature regulating technology. After the material cladding is completed by the MIG main arc, the deposited layer is subjected to secondary heat field intervention by the rear TIG arc, so as to provide sufficient kinetic conditions for Cu liquid phase migration. The method ensures that the liquid copper sufficiently migrates to both sides of the molten pool under the driving of surface tension and Marangoni convection, forms a gradient cladding structure with uniform thickness, and improves the microhardness of the interface area.

The application discloses a method for full-amount recycling and utilization of circuit board acidic etching waste liquid, and belongs to the technical field of acidic etching waste liquid treatment. The application controls the high synergy of the acidic etching production line and the diaphragm electrolysis regeneration of the etching waste liquid through proper technical means. Chlorine generated by diaphragm electrolysis and low-copper regenerated etching liquid are returned to the etching production line. The surplus chlorine in the anode area is temporarily stored in the form of bleaching water by absorbing the liquid alkali. When the oxidant amount of the etching production line is insufficient, chlorine is prepared by bleaching water and hydrochloric acid to make up for it. The technical problem of the increment of the acidic etching waste liquid recycling and regeneration waste liquid is solved. The method for full-amount recycling and utilization of the acidic etching waste liquid can not only improve the added value of the etching waste liquid copper product of a PCB manufacturing enterprise and the market competitiveness of the enterprise, but also avoids the secondary pollution of the environment in the outsourcing treatment process of the etching waste liquid, and has good economic and environmental benefits.

The invention provides a low-cost nickel-free weathering steel copper brittleness control method which comprises the steps that the heating temperature of a heating section is controlled, so that the actual slab temperature is lower than the melting point 1083 DEG C of copper, the existence time of liquid copper is shortened, and aggregation of the liquid copper at an austenite grain boundary during heating is reduced; the heating temperature of the second heating section is controlled to be less than or equal to 1100 The adverse effect of copper brittleness of the low-cost nickel-free weathering steel is overcome, the production technology on the premise of the low-cost nickel-free weathering steel is finally formed, and the surface and performance of the product are qualified.

The invention provides an acetylene hydrochlorination reaction liquid copper-based catalyst and a preparation method and application thereof, and belongs to the technical field of chemical industry catalysis. The liquid copper-based catalyst for the acetylene hydrochlorination reaction is obtained by uniformly mixing cuprous chloride, concentrated hydrochloric acid and metal chloride. The copper-based catalyst exists in a reactor in a liquid complex state, and has the advantages of high activity and good stability; and the copper-based catalyst belongs to a fluid type catalyst, has good intermolecular heat transfer performance, is easy to replace and regenerate, does not have the problem of pressure drop between bed layers, is uniform in heat transfer, and does not cause the phenomenon of overhigh local temperature. The copper-based catalyst is used for catalyzing an acetylene hydrochlorination reaction to prepare vinyl chloride, the reaction is carried out on the surface and / or in the liquid complex, the conversion rate of acetylene is greater than 98%, the by-product (mainly dichloroethane) is lower than 0.5%, and the copper-based catalyst has a good application prospect.

The utility model discloses a system for removing copper from tin melting liquid. The system comprises a cooling device for treating the tin melting liquid, a filtering device for treating the tin melting liquid treated by the cooling device, and an electro-deposition device for performing electrochemical treatment on the tin melting liquid treated by the filtering device to remove copper. According to the copper removal system, elementary substance copper and ion copper in the tin melting liquid are removed through a physical method and an electrochemical method, the purity of the tin melting liquid can be guaranteed, the service life of the tin melting liquid is prolonged, the use cost of the tin melting liquid is reduced, and the follow-up sewage treatment difficulty is reduced; meanwhile, the uniformity and the quality stability of the tin melting process can be improved, the product quality is improved, and pollution diffusion caused by the fact that copper enters the follow-up process along with flowing of tin melting liquid is avoided; and elementary substance copper obtained through separation and electro-deposition of the tin melting liquid copper removal system can be recycled in a centralized mode, material waste is reduced, and meanwhile economic benefits can be generated.

The invention discloses a directional solidification vacuum casting device based on high-purity copper purification, and relates to the technical field of high-purity copper purification. According to the directional solidification vacuum casting device based on high-purity copper purification, a smelting assembly, a water cooling system assembly, an air inlet pipe, an L-shaped pipe, a one-way valve and a corundum vent plug are adopted, electric induction heating coils are distributed on the upper portion and the lower portion of the periphery of a crucible to conduct induction smelting on a copper material in the crucible, and meanwhile an electromagnetic stirring device is started to stir copper liquid in the crucible; then, a proper amount of inert gas is injected into the crucible from the bottom of the crucible to form bubbles, the bubbles adsorb the impurities in the copper liquid in the rising process and bring the impurities to the surface of the copper liquid, a water cooling system assembly in the middle of the outer wall of the crucible is started after induction smelting is finished, and the middle of the crucible is cooled; and copper atoms gradually grow and crystallize from the middle to the two ends, solute in liquid copper moves to the two ends, and the purification effect of high-purity copper is improved.

The utility model discloses a kind of circuit board etching waste liquid copper recovery and wastewater treatment integrated equipment, and it is related to circuit board technical field.A kind of circuit board etching waste liquid copper recovery and wastewater treatment integrated equipment, comprising: mixing box, the right side of the mixing box is communicated with conveying valve, one end of the conveying valve is communicated with electrolytic tank, the upper end of electrolytic tank front side and the upper end of rear side mounting block, the both sides in electrolytic tank interior are provided with positive plate and negative plate respectively, lifting assembly and mixing component, the lifting assembly is located on mounting block.Solved in circuit board etching waste liquid, copper recovery in micro-etching waste liquid is realized by electrolytic method, when a large number of copper element is attached on cathode plate, most of them are taken out by manual mode, then the copper element on it is cleaned and collected, and then inserted into electrolytic cell, this process is time-consuming and laborious, and the technical problem of relatively complicated labor intensity is large.

The invention provides an on-line detection method for copper particles in industrial lubricating oil liquid. The method comprises the following steps: expanding data of the content of non-ferromagnetic particles and the content of copper particles in the lubricating oil liquid, which are measured by experiments; according to the measured data of the non-ferromagnetic particles and the copper particles, an operation program of a BP neural network is written, the structure of the BP neural network is defined, and parameters are initialized; based on the obtained data of the content of the non-ferromagnetic particles and the content of the copper particles in the oil liquid, repeatedly training the data by utilizing a BP neural network program so as to obtain a statistical relationship between the content of the non-ferromagnetic particles and the content of the copper particles; according to the method, built-in parameters of a BP neural network program are optimized through a genetic algorithm, a statistical relationship with higher accuracy between the non-ferromagnetic particles and the copper particles is obtained and serves as a copper particle prediction model, and the content of the copper particles in the oil can be obtained by measuring the content of the non-ferromagnetic particles in the oil. And establishing a copper particle online detection method.

The application relates to a method for preparing a tungsten-copper composite material based on a calcium hot reduction and infiltration process, and relates to the technical field of tungsten-copper composite material preparation. First, tungsten oxide is blended with calcium powder and subjected to calcium hot reduction treatment, then is subjected to screening to remove the CaO impurity phase with a large particle size, tungsten powder raw material with more pores is obtained, the tungsten powder is pressed into a blank and is pre-sintered to prepare a high-porosity tungsten skeleton, and then is sintered and infiltrated with high-sphericity copper powder prepared by gas atomization to obtain tungsten-copper composite material with high compactness and high thermal conductivity, and effective combination between tungsten and copper is realized. The tungsten oxide is reduced by the calcium hot reduction process with high reduction efficiency, tungsten powder with high porosity is obtained, the combination sites of copper in the tungsten skeleton can be effectively improved, and the pore morphology can be improved, meanwhile, the high-sphericity copper powder prepared by gas atomization can significantly improve the wettability of the copper liquid in the tungsten skeleton, the driving force for the liquid-state copper to infiltrate into the tungsten skeleton is increased, and the sintering and infiltration process can improve the capillary action of the liquid-state copper in the tungsten skeleton and improve the combination strength.

The invention discloses a method for preparing a tungsten-copper composite material based on calcium thermal reduction and infiltration processes, and relates to the technical field of tungsten-copper composite material preparation. Firstly, tungsten oxide and calcium powder are blended, calcium thermal reduction treatment is conducted, then screening is conducted to remove impurity phase CaO with the large particle size, a tungsten powder raw material with multiple pores is obtained, the tungsten powder is pressed into a blank, presintering is conducted to prepare a high-pore tungsten framework, sintering infiltration is conducted on the high-pore tungsten framework and high-sphericity-degree copper powder prepared through gas atomization, and the high-sphericity-degree copper powder is obtained. The tungsten-copper composite material with high density and high thermal conductivity is obtained, and effective combination between tungsten and copper is achieved. Tungsten oxide is reduced through a calcium thermal reduction process with high reduction efficiency, the tungsten powder with high porosity is obtained, the binding site of copper in a tungsten framework can be effectively improved, the pore morphology can be improved, meanwhile, the wettability of copper liquid in the tungsten framework can be remarkably improved through the high-sphericity-degree copper powder prepared through gas atomization, and the high-sphericity-degree copper powder is obtained. The driving force of liquid copper infiltrating into the tungsten framework is increased, and the capillary action of the liquid copper on the tungsten framework can be improved through the infiltration process, and the bonding strength is improved.

The invention provides a high-purity copper-manganese alloy cast ingot and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating a raw material copper and a raw material manganese to obtain treated copper particles and manganese particles; (2) the copper particles obtained in the step (1) are subjected to melting treatment to obtain liquid copper, then manganese particles and the liquid copper are mixed for pre-melting degassing, and first alloy liquid is obtained; (3) manganese particles are added into the first alloy liquid obtained in the step (2) at a controlled speed for alloying treatment, and second alloy liquid is obtained after vacuum purification and refining; and (4) the second alloy liquid obtained in the step (3) is subjected to casting treatment, and the high-purity copper-manganese alloy cast ingot is obtained. According to the method, through the multi-stage control vacuum smelting process of pre-degassing, slow alloying, vacuum purification, speed-controlled solidification and the like, the purity, the component uniformity and the structure compactness of the copper-manganese alloy are effectively improved, and batch, stable and reproducible industrial preparation is achieved.

The invention relates to a preparation method of a nanoscale densified tungsten-copper alloy, which comprises the following steps: performing chromium ion implantation on tungsten powder, and then spraying a copper-titanium composite layer to obtain modified tungsten powder; a certain mass of modified tungsten powder and copper powder are mixed through an ultrasonic-assisted double-planet mixer, and mixed powder is obtained; forming the mixed powder into a blank; and sintering the green body in vacuum to obtain the copper-tungsten alloy. The modified tungsten powder is subjected to chromium ion implantation to form a tungsten-chromium solid solution, so that the surface activity and diffusivity of tungsten are improved, the problem of poor intersolubility of tungsten and copper is solved, and metallurgical reaction active sites are provided; ti-W and Ti-Cu phases are formed by titanium in the copper-titanium composite layer, an interface transition layer is constructed, mechanical occlusion is converted into metallurgical bonding, the interface strength is enhanced, the wettability is improved, and liquid copper is assisted to fill gaps. The ultrasonic-assisted double-planet mixer breaks nano powder agglomeration and enhances powder contact through vibration, revolution and autorotation to realize uniform mixing, and is matched with a copper-titanium composite layer to reduce copper-tungsten interface energy and ensure uniform components.

The present invention discloses a noise-reducing motor and a noise-reduction method thereof, comprising a shell and a mounting mechanism, wherein an end cover is provided at the end of the shell, an air collecting hood is provided at one end of the end cover away from the shell, a cooling ring shell is provided on the circumferential side of the shell, and the end cover is fixedly connected to a third bearing at the center of one side of the shell away from the shell; the present invention arranges a special air duct structure so that when the air is discharged, the air is bent and turbulent in the air duct, thereby reducing the wind noise of the air outlet; water cooling is formed by the cooperation of the first spiral cooling liquid copper tube and the second spiral cooling liquid copper tube, and when the air is discharged, the air is bent when it is discharged from the fourth air hole, which can better dissipate the heat of the heat-conducting fin at this position, and can assist in cooling the vaporized liquid in the first spiral cooling liquid copper tube, thereby reducing the heat dissipation pressure of the heat dissipation fan, reducing its rotation speed, reducing the noise generated by the heat dissipation fan shearing the air, and no additional water cooling mechanism is required, which has higher economic benefits.

The invention relates to a limestone-FeS-carbon powder reconstructed slow-cooling copper slag ore phase coupling heat-mass circulation method, and belongs to the field of high-temperature copper slag waste heat recovery and valuable metal circulation extraction. According to the method, the slaked lime and the iron silicate phase in the copper slag are reconstructed to form the iron oxide and the calcium silicate phase, the iron oxide is reduced into the metallic iron or the ferroferric oxide under the action of the coke and the CO reducing agent, the metallic iron phase in the copper slag is separated through magnetic separation, the copper-containing phase of the copper slag is reconstructed, and the cuprous sulfide phase is enriched; and conditions are created for efficient flotation recovery of copper-containing phases. And finally, a calcium silicate phase in the copper slag reacts with CO2 to form a calcium carbonate phase, the energy storage effect of waste heat in a low-temperature area in the copper slag is achieved, and the stability of the copper slag is also improved. The invention provides a new process for reconstructing a copper slag ore phase by limestone and coke, the method can meet the crystallization growth effect of a copper-containing phase in the slow cooling process of the liquid copper slag, and meanwhile, efficient energy storage of copper slag waste heat is realized through a limestone decomposition reaction and a coke reduction reaction.