807results about How to "Avoid bringing in" patented technology

The invention provides a system and method for transmitting data between a service gateway and relay terminals. The method comprises the steps of: establishing evolution global terrestrial radio access bearer connection between the relay terminals and the service gateway; forming extracted packet data convergence protocol service data units (PDCP SDUs) into packet data convergence protocol protocol data units (PDCP PDUs) and multiplexing the PDCP PDUs to form radio link control protocol data units (RLC PDUs) after an evolution node B of an application side receives data sent by the service gateway; multiplexing the RLC PDU of each relay terminal to form a relay medium access control protocol data unit (R-MAC PDU) and then sending the R-MAC PDU to a relay node; extracting each RLC PDU from the R-MAC PDU by the relay node; and multiplexing all the RLC PDUs of the same relay terminal to form a media access control protocol data unit (MAC PDU) and then sending the MAC PDU to the corresponding relay terminal. By adopting the invention, the aims of introducing the relay node, reducing the cost and improving the efficiency are realized.

The invention discloses nonstick cookware and a manufacturing method thereof, wherein the inner surface of the pot body of the nonstick cookware is provided with an uneven raised structure; a grain structure is distributed on the raised structure; and a nonstick coating covers outside the raised structure and the grain structure. The manufacturing method of the cookware comprises the following steps of: (1) forming the pot body of the cookware; (2) carrying out inner surface treatment on the pot body of the cookware to ensure that the uneven raised structure is formed at the inner surface of the pot body of the cookware; (3) carrying out meltallizing treatment on the cookware blank after being subjected to the roughening treatment to ensure that nanoscale hard metal-based or nonmetal-based grain structure is distributed on the raised structure of the pot body of the cookware; (4) spraying nonstick coatings on the inner surface of the pot body of the cookware after being subjected to the meltallizing treatment to ensure that the nonstick coating covers outside the raised structure and the grain structure; and (5) putting in a sintering channel at a temperature of 350-440 DEG C after the spraying to sinter for 5-20 minutes so as to obtain a finished product. The nonstick cookware disclosed by the invention is good in nonstick effect and abrasive resistance, simple in manufacturing process and suitable for large scale production.

The invention relates to a method of culturing Erythroculter ilishaeformis adult fishes. The method comprises the following steps: stocking the fish fries of Erythroculter ilishaeformis adult fishes in the water area of 5-10 mu with the density being 800-1000 / mu, and the specification of the fish fry stocking being 15-18 cm; providing a clean pond, rich water, water quality management, and the feeding of fish meals; controlling the water environment and the disease occurrences in the culturing process; and obtaining the Erythroculter ilishaeformis adult fishes with the average weight being 0.50kg / tail after one year of culture. Compared with the other inorganic and organic water fertilizing methods, the invention adopts the fertilizing method of using the zymotechnics of multiplicity of microbe groups, so as to reduce the pollution to the feeding environment of the pond by fertilizer water and achieve the purpose of emission reduction. In addition, photosynthetic bacteria are poured after the second day of the water fertilizing, so as to further increase the content of the photosynthetic bacteria in the pond, thus being favorable to the culturing of food organisms, decreasing the number of pathogens, and reducing the occurrence of various diseases.

The invention provides a haematococcus extract preparation, and a preparation method and use thereof. A haematococcus extract soft capsule provided by the invention comprises the contents of haematococcus extract and an oleic phase, wherein the astaxanthin content of the haematococcus extract is 2 to 20 percent (w / w); and the mass-to-volume ratio (g / mL) of astaxanthin in the haematococcus extract and the oleic phase is 1-10:100. The invention also provides the method for preparing the haematococcus extract soft capsules. Experiments show that the haematococcus extract soft capsule provided by the invention has stability remarkably superior to that of the haematococcus extract and conventional products and is of great importance to the application of the astaxanthin to antioxidation, the enhancement of immunity, the suppression of tumorigenesis, the prevention and treatment of cardiovascular disease, the prevention of skin aging and the maintenance of health of eyes and the central nervous system.

The invention relates to a preparation method of a phenyl silicone resin, which is used for preparing silicone resin free of solid salts by using alkyl alkoxy silane monomer and siloxane blocking agent as raw materials, using strong proton acid as a catalyst and cleaning and removing the catalyst with high-purity water at high temperature, wherein organic solvents are not used in the overall process. In the preparation process of the phenyl silicone resin of the invention, the strong proton acid is used as a hydrolytic condensation catalyst, and organic solvents are not used, thus the generating process is environment-friendly; and the catalyst is removed by rinsing, thus the prepared silicone resin is free of solid salt impurities.

The invention discloses a vacuum dust removal foot pad device capable of automatically absorbing sole dust, scraps and attached dirt. The device is an environment-friendly dust removal device. The device solves the problems of sanitation and environmental protection of indoor public places such as factories, restaurants, large supermarkets, office buildings, airports, markets and the like and households. The device has the main application that: the device is arranged at the indoor area entry, and when a person steps on and passes through the device, the device automatically absorbs the attached dirt of the sole so as to avoid bringing the dirt inside. The basic structure of the device comprises an upper cover plate, a bottom framework box and an inner air blowing and dust absorbing trigger mechanism. Isometric spherical raised bulbs are densely distributed on the surface of the upper cover plate, and the lower part of the upper cover plate is connected with the trigger mechanism. When the feet of the person step on the raised bulbs, a starting mechanism in the device is triggered, pores in the middle of the bulbs blow air under positive pressure, meanwhile, four sides of the bulbs absorb dust under negative pressure, and the dirt attached to the soles is absorbed in a multi-point dust absorbing mode through the clearance between the plunger bulbs and the circular holes of the upper cover plate.

The invention discloses an L-shaped full-closed environment-friendly hot galvanizing production method. The method is characterized in that: acid washing step-by-step automatic operation is implemented by adopting a mechanical hydraulic transmission manner, namely an acid washing workpiece automatic conveying system horizontally or vertically lifts to automatically convey workpieces to be galvanized to specified anti-collision acid washing tanks for acid washing and dust removing treatment step by step according to the multi-tank acid washing technological requirements, and the whole acid washing process is sequentially, progressively and automatically finished according to the technological requirements. The L-shaped full-closed environment-friendly hot galvanizing production method is pollution-free, environment-friendly, low in energy consumption, mechanical and automatic, and has the characteristics of full closure and integration of reclamation and treatment; and by the method, acid washing automation is realized, the labor intensity is furthest lightened, the production efficiency is improved, and the problem of pollution is solved.

The invention discloses a bio-enzyme degerming and cleaning effervescent tablet for clothes. The bio-enzyme degerming and cleaning effervescent tablet for the clothes is prepared from the following components in percentage by weight: 20 percent to 55 percent of alkaline effervescing agent, 15 percent to 40 percent of surface active agent, 10 percent to 30 percent of acid effervescing agent, 2 percent to 10 percent of adhesion agent, 1 percent to 5 percent of complex enzyme preparation, 0.5 percent to 3 percent of decolorizer, 0.5 percent to 5 percent of disintegrating agent, and 0.5 percent to 2.5 percent of enzyme stabilizer. The bio-enzyme degerming and cleaning effervescent tablet for the clothes is good in cleaning effect, fast in effervescence time and intense in sense effect; when being used for cleaning the clothes, the components of the bio-enzyme degerming and cleaning effervescent tablet for the clothes are synergized, and especially the enzyme preparation, the surface active agent and various additives are synergized, so that various stubborn stains in the clothes can be quickly removed, the surface active agent has no residue after cleaning, and the bio-enzyme degerming and cleaning effervescent tablet for the clothes is healthy and safe.

The invention discloses a finishing method to synthesize carbinol, which is characterized by the following: rectifying rough carbinol in the pre-tower; adding extracting water from the top of pre-tower; discharging light component from the top of pre-tower; entering rought carbinol into middle part of pressurizing tower to rectify; making residual rough carbinol into middle part of normal pressure tower to rectify; draining waste water from the bottom of tower; dividing the steam of pressurizing tower into two parts to transmit into reboiler on the bottom of pre-tower and reboiler on the bottom of normal pressure tower as heat providing dielectric.

The invention discloses a double-stage purification method of a long chain dicarboxylic acid aqueous phase. The double-stage purification method comprises the following steps: (1) heating and demulsifying terminated fermentation broth of long chain dicarboxylic acid produced by a fermentation method, and filtering the terminated fermentation broth through a ceramic microfiltration membrane to obtain a microfiltration membrane supernatant layer; (2) diluting the microfiltration membrane supernatant, and adding an oxidizing agent under a weak alkaline condition to react to obtain supernatant; or diluting the microfiltration membrane supernatant, and adding the oxidizing agent under a weak acidic condition to react to obtain the supernatant; or diluting the microfiltration membrane supernatant, filtering the microfiltration membrane supernatant through a microfiltration membrane, diluting, and adding the oxidizing agent to react to obtain the supernatant; (3) regulating the pH value of the supernatant to 3.0-5.0 through an acid, maintaining the temperature for 1 h, filter pressing through a plate frame, washing a long chain dicarboxylic acid filter cake layer through acidic washing water of a saturated sodium salt, press filtering the acidic water of saturated salt in the dicarboxylic acid filter cake, removing the sodium salt from the pure water, and drying to obtain a long chain dicarboxylic acid product. The double-stage purification method disclosed by the invention is short in process route, low in production cost, high in yield, high in purity, good in aqueous phase crystal morphology, capable of solving the defects of a current aqueous phase method product of low purity, high protein content and bad color and luster, and beneficial for large-scale industrial production.

The invention relates to a preparation method of ternary system material, in particular to a preparation method of lithium cobalt nickel manganese oxide ternary system material for lithium ion batteries. The invention applies ensured ternary system material salt as raw material. After needed matching weight, by means of eve dissolving and mixing, a composite metal oxide prepared by a spray-roasting method is used as a fore body. The fore body is mixed with a lithium-source compound according to the substance amount of 1:1-1.5, and then roasting is carried out at the temperature of 700 to 1000 degrees centigrade to obtain the ternary system material. The tail gases, such as vapor, acidic gas, generated in the spray-roasting process are absorbed by a washing tower to obtain acid. The invention has the advantages of advanced technique, stable production, low cost, no waste water discharge, environmental protection, high product purity, even granularity, high crystallinity, etc.

The invention relates to a complete cycle preparation method of lithium iron phosphate by using lithium ores as a lithium source, comprising the following steps: carrying out calcining, acidifying, leaching, purifying and separating on the lithium ores to obtain a primary lithium liquid, carrying out conversion and refrigeration, filtering and washing, evaporative concentration on the primary lithium liquid to obtain a lithium liquid for synthesis, letting the lithium liquid for synthesis, a ferrite solution, and a phosphor source solution be subject to liquid phase synthesis, and calcining to obtain the carbon coated lithium iron phosphate. According to the invention, cooling crystallization, separation, drying and other steps in the preparation of lithium iron phosphate with lithium ores are left out, and the byproducts obtained by evaporative concentration, filtering and separating are recycled, so that the utilization rate of resource is increased, and the cost is saved; and the prepared lithium iron phosphate has the characteristics of high purity, excellent electrochemical performance and the like, so that the circular economy is realized.

The invention relates to a vacuum-pumping system and a vacuum-pumping method for a large-capacity low-temperature thermal insulating container. The system comprises an air supplying device, a vacuum-pumping device and a heating device, wherein the heating device comprises an outer tank heating device and an inner tank heating device; a thermal insulating container to be pumped comprises an outer tank, an inner tank and an interlayer formed by the outer tank and the inner tank; the outer tank heating device is arranged outside the outer tank of the thermal insulating container to be pumped; the inner tank heating device is arranged inside the thermal insulating container to be pumped; the air supplying device is communicated with each of the inner tank and the interlayer of the thermal insulating container to be pumped through a pipeline; and the vacuum-pumping device is communicated with the inner tank and the interlayer of the thermal insulating container to be pumped by pipelines. The invention provides the vacuum-pumping method for the large-capacity low-temperature thermal insulating container, and with the adoption of the method, the vacuum-pumping period of the container is shortened, and water and oily gas inside the interlayer can be thoroughly replaced with low cost.

The invention relates to a technology for extracting and separating active ingredients of traditional Chinese medicines, in particular to a method for extracting and separating high-purity 1-deoxynojirimycin from folium mori, which comprises the following steps of: extracting a powder material by using an aqueous solvent, filtering off dregs, and centrifuging the material to obtain extracting solution; concentrating the extracting solution until ethanol does not exist, and filtering by using an ultrafiltration membrane; regulating the pH to be 3.0-4.0 by using inorganic acid, precipitating, and centrifuging to removing impurities; applying acidified feed to a strong acid cation resin column, washing with water, and eluting by using ammonia water; applying feed liquid to a porous resin column, washing with water, performing gradient elution by using ethanol with different concentrations, and collecting target eluent; concentrating the target eluent under reduced pressure, and drying to obtain a crude product; dissolving the crude product by using absolute ethanol, making the solution pass through an alkaline adsorbing column to remove impurities, and collecting effluent liquid; and concentrating the effluent liquid under reduced pressure, and performing normal temperature crystallization and recrystallization to obtain the refined 1-DNJ product. In the whole technological process, except ethanol, other organic solvents are not used, the operation is safe, and the 1-DNJ content can reach 98.3 percent.

The invention relates to a method for producing water-white hydrogenated rosin, which comprises the following steps: using light color refined rosin obtained after purifying the rosin as hydrogenation raw materials, using a solvent for preparing solution, carrying out catalytic hydrogenation, then, separating out the solvent through distillation, and obtaining the water-white hydrogenated rosin. When the method provided by the invention is adopted, the water-white hydrogenated rosin with light color (the Lovibond color number of the yellow color is 0.3 to 1.0, and the Lovibond color number of the red color is 0.2 to 0.3), low iodine value and low abietic acid content can be obtained. Compared with the water-white hydrogenated rosin produced by a traditional method, the water-white hydrogenated rosin produced by the method provided by the invention has the advantages of lighter color, higher hydrogenation degree, better stability and lower cost, and the application value of products can be improved when the water-white hydrogenated rosin is applied to aspects such as electronics, paint, bonding agents, dyestuff and the like.

The invention discloses a preparation method for active copper oxide by using a spray flashing calciner. The method comprises the following steps: with copper, liquefied ammonia and ammonium bicarbonate as raw materials, preparing concentrated ammonia liquor with a concentration of 10 to 12% at first; then adding excess concentrated ammonia liquor into electrolytic copper, adding ammonium bicarbonate, introducing air at the same time and carrying out leaching and synthesis at a temperature of 60 to 70 DEG C so as to prepare cuprammonia; after filtering, pumping the cuprammonia into a reaction vessel for thermal decomposition so as to prepare a basic copper carbonate feed liquid; and filling the spray flashing calciner with the basic copper carbonate feed liquid, carrying out calcining at a temperature of 450 to 600 DEG C so as to prepare active copper oxide and recovering and reusing gas produced in the reaction by using an absorption tower. The method provided by the invention has the advantages of an increased reaction speed, substantially improved production efficiency, higher product purity, lower production cost and a wider product application scope; moreover, since the spray flashing calciner is used, heat dissipation is small, the resource of coal is saved, and requirements for energy conservation and environmental protection are better met.

The invention relates to a solid calcium metal cored wire for deoxidation in steel making, which comprises an outer steel shell, a middle protective layer and an inner core, wherein the inner core is a solid calcium metal wire. The provided solid calcium metal cored wire can reduce the gasification speed of calcium metal, increase the time for absorbing the calcium metal by molten steel, overcome the phenomenon of affecting wire feeding due to hollowness or uneven core powder weight existing in a powdery calcium metal cored wire, and avoid bringing in harmful elements (S, P, C and Si) in the powdery calcium metal cored wire, thereby greatly enhancing the yield of the calcium metal.

The invention discloses a sectional type natrium-calcium double alkali desulfurization process, which integrates calcium group desulfurization and flue gas desulfurization of alkali-natrium method in one reactor to make the flue gas preliminary desulfurize using calcium group and then finish desulfurize using natrium group to meet the discharging require. The invention also discloses a device using the sectional type natrium-calcium double alkali desulfurization process. The calcium group desulfurization sectional absorber and alkali-natrium method desulfurization sectional absorber are mounted in the same reactor, to dually desulfurize to the flue gas, at the same time avoid taking the seriflux to the demister, and simplify the cleaning device of demister. The cleaning of the demister uses clear liquid of natrium group to reduce the use of water in the process.

The invention discloses a purification device for electronic grade ultra-pure ammonia. The purification device comprises a liquid ammonia storage tank, a liquid ammonia pump, a carburetor, a degreaser, rectifying towers, a terminal purifier, a condenser and a product storage tank; the rectifying towers comprise a first rectifying tower and a second rectifying tower; the liquid ammonia pump is connected to the liquid ammonia storage tank and used for pumping liquid ammonia to the carburetor; the output of the carburetor is connected to the degreaser; the output of the degreaser is connected to the upper middle part of the first rectifying tower; the output of the tower top of the first rectifying tower is connected to a tower kettle of the second rectifying tower; the output of the tower top of the second rectifying tower is connected to the terminal purifier; the output of the terminal purifier is connected to the condenser; and the output of the condenser is connected to the product storage tank. In addition, the invention also provides a purification method for purifying the electronic grade ultra-pure ammonia by using the purification device. By using the device and the method, the limitation of the traditional ultra-pure ammonia refining process flow is avoided, the refining process of the ultra-pure ammonia is simplified, the energy consumption of the whole production process is greatly reduced, and the production efficiency is improved.

The invention discloses a clothes washing and drying machine with a heat pump, a heat pump unit and application of the heat pump in the clothes washing and drying machine with the heat pump, wherein the heat pump unit comprises a shell, an evaporator fixed in the shell, and a condenser fixed in the shell, the shell is provided with a first accommodating cavity, a second accommodating cavity communicated with the first accommodating cavity, and drainage holes in the bottom of the first accommodating cavity, the evaporator is located in the first accommodating cavity, the condenser is located in the second accommodating cavity, the shell is further provided with a binding opening in a shrinking shape in the height direction, the bottom of the binding opening is higher than the drainage holes, and the first accommodating cavity is communicated with the second accommodating cavity through the binding opening. The clothes washing and drying machine with the heat pump, the heat pump and application of the heat pump in the clothes washing and drying machine with the heat pump have the benefits that the bottom of the binding opening is higher than the drainage holes, so that on one side, the water drainage is facilitated, on the other side, the air processed after the evaporator moves towards the second accommodating cavity from bottom top, therefore, the condensed water is prevented from being brought in, and the energy efficiency is higher.

The invention discloses a production method of a low-salt oyster polypeptide and oligosaccharide nutrition powder. According to the production method, oyster obtained via shell removing is taken as a raw material, is repeatedly immersed in ice water at 4 to 10 DEG C for 2 to 4h; the oyster obtained via immersion desalting is subjected to slurry homogenizing, and is subjected to high temperature treatment for disinfection and protein denaturation; obtained oyster slurry is cooled with normal temperature water; pH value is adjusted to be 7.0 to 9.0, and 0.5 to 1.0wt% of protease is added for protein enzymatic hydrolysis; after high pH protease enzymatic hydrolysis, the temperature is adjusted, and 0.5 to 1% of a weakly acidic protease is added for enzymatic hydrolysis; amylase is added for degradation of glycogen; an obtained product is subjected to high temperature treatment, filtering, and spray drying so as to obtain the oyster polypeptide and oligosaccharide nutrition powder. The production method is simple; cost is low; and the obtained oyster polypeptide and oligosaccharide nutrition powder can be absorbed by human body easily.

The invention discloses a seamless solid metal calcium cored wire for steelmaking and deoxidation and a preparation method thereof. The seamless solid metal calcium cored wire consists of an outer-layer steel tube, a middle coating layer and an inner core, wherein the inner core is a solid metal calcium (pure calcium) wire. The seamless solid metal calcium cored wire disclosed by the utility model has the beneficial effects that vapor pressure and the gasification rate of metal calcium can be reduced, the depth of the seamless solid metal calcium cored wire inserted in molten steel is increased, the boiling of the molten steel is reduced, the time that the metal calcium is adsorbed by metal is reduced, the boiling phenomenon of the existing seamed solid calcium cored wire inserted in the molten steel is overcome, the phenomenon that the wire feeding is affected due to hollow powder calcium cored wire and non-uniform core powder weigh is reduced, and the bring-in of harmful elements (S, P, C and Si) in the powder calcium cored wire is avoided, so that the yield and the stability of metal calcium are greatly improved.

The invention provides a membrane assisted separation of glycoprotein all N-linked carbohydrate chain and an identification method thereof, and solves problems of low reaction efficiency and identification of few types of carbohydrates in prior art. According to the invention, a molecular sieve effect of a membrane of 8-12KD is employed to separate carbohydrate chain released from glycoprotein from protein; on a molecular sieve of 10KD, an N-linked carbohydrate chain of the glycoprotein is released by a PNGase F enzyme; the N-linked carbohydrate chain flows out through repeated centrifugation, but the protein is retained on the membrane, thereby realizing separation of the carbohydrate chain. The method has obvious carbohydrate chain separation effect, and avoids by-products caused by non-specific adsorption and chemical reactions; besides, the method has high reaction efficiency and concise reaction steps.

The invention provides a preparation method for TA5 titanium alloy bars with small specifications. The method comprises the following steps: first, cogging forging is performed on TA5 titanium alloy ingot above a beta phase change point at 50 DEC G-200 DEC G to obtain first forging stock; second, pulling forging is performed on the first forging stock above the beta phase change point at 10 DEC G -30 DEC G to obtain second forging stock; third, second pulling forging is performed on the second forging stock below the beta phase change point at 10 DEC G -20 DEC G to obtain a third forging stock; fourth, the third forging stock is thoroughly abraded; and fifth, the third forging stock is rolled at initial rolling temperature of 30 DEG C-40 DEG C below the phase change point to obtain the TA5 titanium alloy bars of small specifications with diameter of 17mm-33mm. Bar blanks are rolled by the method of combining cogging forging, free forging and fine forging, and the TA5 titanium alloy bars with small specifications are rolled and obtained. The TA5 titanium alloy bars with small specifications are good in surface quality and mechanical properties and high in yield.

The invention discloses a method for preparing high-purity low-chlorine electroplating-grade cupric oxide. According to the method, copper, liquid ammonia and high-purity carbon dioxide are taken as raw materials, stronger ammonia water is prepared firstly, carbonated ammonia water is obtained through introducing the high-purity carbon dioxide into the stronger ammonia water and controlling carbonization degree, the carbonated ammonia water reacts with the copper under certain air pressure so as to prepare copper-ammonia complexation liquid, the copper-ammonia complexation liquid is then subjected to heating, ammonia distilling, separating, washing, drying and sieving so as to prepare high-purity heavy basic copper carbonate, and the heavy basic copper carbonate is then subjected to heating calcination and decomposition, thereby preparing the high-purity low-chlorine electroplating-grade cupric oxide. According to the method, the carbon dioxide is directly used as a raw material, so that the problems of the traditional method that impurities, such as heavy metal ions and chloride ions, are introduced by raw materials used in the production of basic copper carbonate are solved, the rate of reaction is increased, the production cycle is shortened, the production efficiency is greatly increased, and products are low in impurity content, high in purity, high in activity and wider in application; and meanwhile, the method is high in yield, low in energy consumption, and low in cost and hardly causes pollution.

The invention discloses an extraction method of seaweed polysaccharide. The method consists of the following steps: (1) washing the raw material seaweed, drying and crushing and sieving with a 60-mesh sieve; (2) adding distilled water into the sieved crushed product accurately at a solid-liquid ratio of 1:(25-35), performing ultrahigh-pressure extraction, pressurizing to 200-400MPa and controlling the temperature to 30-70 DEG C, maintaining the pressure for 3-8 minutes, performing suction filtration and fetching the filtrate to obtain crude extract of seaweed polysaccharide; (3) adding activated carbon into the crude extract for decoloration, and filtering to obtain mixed liquid; and (4) further performing concentration, crystallization, filtration and drying of the mixed liquid to obtain a pure product of seaweed polysaccharide. The method disclosed by the invention is simple and easy to operate, takes short extraction time, is applicable to industrial production and can be used for obtaining a seaweed polysaccharide product with high purity and few impurities and free from microbial infestation.

The invention relates to a method for preparing a copper and chromium 50 electric contact material by utilizing a vacuum arc remelting furnace. Copper powder with particle diameter ranging from 0.01 micron to 1 micro, and chromium powder with particle diameter ranging from 0.01 micron to 1 micro are prepared with a new method, and are smaller in particle diameter compared with the copper powder and the chromium powder used in the prior art. The prepared copper powder and chromium powder are chosen to be mixed according to certain proportion, the mixer is pressed into material bars by using cold isostatic pressing, and the material bars carry out consumable electrode arc melting after being sintered to form alloy ingots. Under the action of a high-temperature electric arc, a consumable electrode carries out layered melting quickly and evenly and drops to the bottom of a water cooling crystallizer, and because of the large cooling rate on the periphery of the crystallizer furthermore, itis realized that Cu and Cr alloy ingots solidify, and then uniform and fine Cu and Cr alloy structures are obtained, wherein the content of Cr in Cu and Cr alloy ranges from 45% to 55%. According tothe method for preparing the copper chromium 50 electric contact material by utilizing the vacuum arc remelting furnace, a vacuum consumable electrode arc melting method is used for preparing a Cu andCr electric contact material with the content of Cr ranging from 45% to 55% (wt), the material is free of pores, loose, less in impurities, free of macro and micro defects such as Cu and Cr enrichment, and both the microstructure of Cu and the microstructure of Cr are smaller than 20 micrometers.

The invention belongs to the field of additives for aluminum alloy and discloses a manganese additive for aluminum alloy and a preparing method of the manganese additive. The manganese additive comprises manganese powder, aluminum powder, iron powder and fluxing agents. The manganese powder, the aluminum powder, the iron powder and the fluxing agents are crushed under protection of inert gas. The manganese additive further comprises a surfactant. The manganese additive comprises 86%-97% of the manganese powder, 2.39%-6.39% of the aluminum powder, 0.01%-5% of the fluxing agents, 0.5%-2% of the surfactant and 0%-6% of the iron powder. According to the size distribution, the manganese powder comprises 35%-40% of manganese powder bodies with the size ranging from 325 meshes to 700 meshes, 40%-45% of manganese powder bodies with the size ranging from 100 meshes to 325 meshes, 5%-15% of manganese powder bodies with the size ranging from 60 meshes to 100 meshes and 0%-5% of manganese powder bodies with the size ranging from 10 meshes to 60 meshes. The size distribution of the aluminum powder ranges from 60 meshes to 300 meshes. The size distribution of the fluxing agents ranges from 60 meshes to 300 meshes. The method includes the steps of 1, crushing, 2, material preparing, 3, material mixing, 4, pressing, 5, drying, 6 packaging and the like. According to the manganese additive for the aluminum alloy, the content of manganese is high; and when the manganese additive is dissolved into molten aluminum, the melting temperature is low, the melting time is short, and the recovery rate of manganese is high.

The invention relates to a method for preparing cobalt oxide, nickel oxide and copper oxide, in particular relates to a method for preparing the oxide of the cobalt (Co3O4, Co2O3), the oxide of the nickel (NiO), the oxide of the copper (CuO), and the like. The minerals containing the cobalt, the nickel or the copper are adopted as the raw material; after the minerals is dipped and purified to get high-purity cobalt salt, nickel salt or copper salt solution; the salt solution is made into the mist-shaped liquid drop in the mist spraying way; the cobalt oxide, the nickel oxide or the copper oxide can be prepared through the dehydration, high-temperature hydrolysis and the crystal-shape re-shaping; the tail gases such as the vapor and the acid gases that are generated in the hydrolysis process are absorbed by a leaching tower to get the acid, and the acid is returned to be used for the dipping and purification process of the minerals, thereby realizing the comprehensive cycling application in the preparation process. The method can also be used for processing the waste material containing the cobalt, the nickel or the copper. The invention has the advantages of advanced process, stable production, low cost, no waste water discharging, environmental protection, high purity of the product, uniform granularity, high crystallization, and the like.

The invention discloses a water removal and concentration gas path system and a method for volatile organic compounds in atmosphere. The system comprises a first-stage high-carbon trap, a second-stagelow-temperature water removal cold trap and a third-stage low-temperature adsorption cold trap, the first-stage high-carbon trap, the second-stage low-temperature water removal cold trap and the third-stage low-temperature adsorption cold trap are fixedly communicated through six-way valves; the method is scientific and reasonable, safe and convenient use, the gas path passes through a first-stage high-carbon trap; high boiling components are trapped, water vapor is removed through a secondary low-temperature water removal cold trap; then the gas enters a third-stage low-temperature adsorption cold trap to adsorb and trap the gas penetrating through the second-stage cold trap; according to the method, high-boiling-point components intercepted by the first-stage high-carbon trapping trap can be transferred into the third-stage low-temperature adsorption cold trap along with carrier gas; according to the method, the condensation of the high-carbon component in the water removal cold trap is avoided while water is removed, the recovery rate of the high-boiling-point component is improved, and the content of the tested high-boiling-point component is closer to an actual value, so thatthe authenticity and the accuracy of data are greatly improved.