59results about How to "Reduce oxidation reaction" patented technology

The invention discloses an aquatic product ultra-low temperature fresh-keeping processing control method, and relates to the technical field of aquatic product fresh-keeping processing, and the method specifically comprises the following steps: evaluating a fat local oxidation risk grade caused by oxygen exposure on the surface of a high-fat aquatic product in each region in a freezing chamber; dividing each area in the freezing chamber into a low risk area, a medium risk area and a high risk area according to an evaluation result; constructing an oxidation risk adjustment mechanism according to the division result of each region in the freezing chamber; in the implementation process of the oxidation risk adjustment mechanism, whether the adjustment effect of the oxidation risk adjustment mechanism on each region can reach the expectation or not is evaluated, and the oxidation risk adjustment mechanism is optimized according to the evaluation result. According to the method, the problem of fat oxidation caused by oxygen exposure on the surface of the high-fat aquatic product in the ultralow-temperature freezing process is solved, and the preservation effect in the freezing process is effectively improved through real-time monitoring and dynamic optimization of an adjustment mechanism.

The invention discloses a process for smelting a ZL205A alloy. The process comprises the following steps: S1, ultrasonic pretreatment of raw materials: pretreating the raw materials of the ZL205A alloy by utilizing an ultrasonic technology; s2, segmented precise feeding and continuous stirring; s3, an argon dynamic protection system; S4, intelligent temperature control and energy recovery; s5, performing online component analysis and real-time adjustment; s6, a green pouring and cooling system; by optimizing the smelting process, adding a trace nucleating agent and other measures, the strength, toughness, corrosion resistance and other properties of the aluminum alloy can be remarkably improved, and the aluminum alloy can meet the requirement for high-performance application; the segmented precise feeding and continuous stirring technology is adopted, it is guaranteed that alloy elements are evenly distributed in the aluminum alloy, and the problem of unstable performance caused by uneven element distribution is solved; the argon dynamic protection system can effectively reduce oxidation and air suction phenomena in the smelting process, reduce generation of oxides and air holes and improve the quality of aluminum alloy.

The intelligent cutting equipment comprises a supporting frame, a pipe conveying mechanism, a pipe rotating mechanism and a cutting mechanism, the side face of the cutting mechanism is provided with a flow adjusting mechanism and a self-adaptive spray head, the pipe conveying mechanism comprises a sliding table, a lead screw and a first motor, the sliding table is slidably connected with the supporting frame, and the lead screw penetrates through the sliding table to be in threaded connection with the sliding table; the pipe rotating mechanism comprises a rotating disc, a chuck and a second motor, the rotating disc is rotationally connected with the supporting frame, the second motor is rotationally connected with the rotating disc through the synchronous belt and the synchronous wheel, the chuck is fixedly installed on the rotating disc, and the cutting mechanism comprises a laser cutting head and a telescopic air cylinder. The cutting mechanism is installed on the top of the supporting frame, and a cooling flow channel is formed in the side wall of the laser cutting head. The problem that in the prior art, a laser cutting head cooling refrigerant cannot be adjusted in a self-adaptive mode according to the cutting head, so that resources are wasted or the cooling effect is poor is solved.

The invention discloses a composition for delaying oxidation of a phenolic hydroxyl compound, which comprises a protective agent, a stabilizer and a protective agent, and the mass ratio of the protective agent to the stabilizer to the protective agent is (0.01-0.3): (0.01-3): (0.005-5). According to the composition for delaying oxidation of the phenolic hydroxyl compound, hydroxyl in the phenolic hydroxyl compound is influenced by a benzene ring, so that the activity is enhanced, and the phenolic hydroxyl compound is easily oxidized into quinones with different colors. The composition comprises a protective agent, a stabilizer and a protective agent which can form a triple protective cover to delay the oxidation of the phenolic hydroxyl compound. Wherein the protective agent can be complexed with metal ions to reduce the catalytic action of trace iron or other heavy metals in the system on the oxidation reaction, so that the generation rate of free radicals is reduced; hydrogen bonds are formed between the stabilizer and the phenolic hydroxyl compound, so that the probability that the phenolic hydroxyl group is attacked by free radicals is reduced, and the oxidation reaction of the phenolic hydroxyl compound is delayed; the protective agent has a certain electron donor capability and is competitively combined with free radicals, so that the free radicals become relatively stable, attack of the free radicals on phenolic hydroxyl groups is interrupted, oxidation reaction is inhibited, the thermal stability of phenolic hydroxyl compounds is greatly improved, and discoloration reaction is delayed.

The invention relates to the technical field of intelligent materials, and discloses a p-MXene conductive ink and BC reinforced polymer composite film and a preparation method and application thereof.The composite film comprises MXene and bacterial cellulose, the surface of the MXene is coated with waterborne polydopamine, waterborne polyurethane is embedded in the bacterial cellulose, and the surface of the MXene is coated with waterborne polyurethane; hydroxyl groups in the water-based polydopamine and amino groups in the water-based polyurethane form hydrogen bonds to connect the MXene with the bacterial cellulose. The composite film obtained by the invention has excellent mechanical properties and electrical properties, and also has comprehensive properties such as electromagnetic shielding and stress-strain sensing.

The invention provides a fully synthetic cutting fluid special for a copper part and a preparation process thereof. The fully synthetic cutting fluid special for the copper part comprises the following raw materials in parts by weight: 0.5-2.0 parts of a defoaming agent, 1.0-3.0 parts of an antioxidant, 0.5-2.0 parts of a corrosion inhibitor, 2.0-5.0 parts of a surfactant, 0.5-1.5 parts of a metal ion complexing agent and 80.0-100.0 parts of deionized water. Wherein the antioxidant is prepared from carnosol, daidzin and butylated hydroxytoluene. The carnosol and the daidzin can be used for reducing the oxidation reaction by capturing free radicals, and the butylated hydroxytoluene can be used for further enhancing the anti-oxidation effect by interrupting the oxidation chain reaction. And through the combined action and mutual complementation of different anti-oxidation mechanisms, a synergistic effect is formed, and oxidation of the copper part in the machining process is effectively prevented. Wherein the metal ion complexing agent is composed of isothiocyanate, polyaspartic acid and amino trimethylene phosphonic acid, multiple protection mechanisms are formed, and the corrosion resistance of the copper part is remarkably improved. And the existence of the metal ion complexing agent is also beneficial to improving the stability of the cutting fluid.

The invention discloses a high-titanium nickel niobium-based alloy and a preparation method thereof, the method comprises the following steps: step 1, niobium alloy powder is prepared and subjected to vacuum drying, the atom proportion of Nb powder in the niobium alloy powder is 60%-75%, the atom proportion of Ti powder in the niobium alloy powder is 15%-25%, the atom proportion of Ni powder in the niobium alloy powder is 6%-12.5%, and the balance is refractory metal element powder; 2, the niobium alloy powder is made into a high-titanium-nickel-niobium-based alloy blank through laser additive manufacturing equipment; and 3, the high-titanium-nickel-niobium-based alloy blank is put into a high-temperature furnace with the high vacuum degree, after the air pressure in the furnace reaches 1 * 10 <-3 > Pa to 5 * 10 <-3 > Pa through a mechanical pump and a diffusion pump, the temperature is increased to 1000-1200 DEG C from the room temperature at the temperature increasing rate of 10 DEG C / min, annealing is conducted for 1-10 h, and after furnace cooling is conducted, the high-titanium-nickel-niobium-based alloy is obtained and has the high melting point and the excellent mechanical property.

The invention relates to the field of tea beverages, in particular to a litsea coreana beverage and a preparation method thereof.The litsea coreana beverage is composed of litsea coreana soup, baking soda, vitamins and water, the sugar degree of the litsea coreana beverage is 0.04-0.17%, and the pH value of the litsea coreana beverage is 5.5-6.5. The problems that an existing hawk tea beverage lacks the characteristic flavor of hawk tea and contains many additives can be solved.

The invention relates to the technical field of food processing and storage and transportation preservation, in particular to a three-section variable-temperature liquid nitrogen quick-freezing preservation method for beef and application, and the method comprises the following steps: S1, performing pretreatment such as trimming, fascia removal and pre-cooling on beef; s2, performing three-stage variable-temperature liquid nitrogen quick freezing to enable the central temperature of the meat to reach-18 DEG C; and S3, after the sample is frozen and stored for 28 days, performing quality detection and analysis. The three-stage variable-temperature liquid nitrogen quick freezing provided by the invention can effectively reduce the freezing time and cooking loss of the beef, delay the spoilage of proteins and lipids, maintain a better muscle tissue form, and maintain the fresh appearance characteristic of the beef.

The invention relates to the technical field of civil air defense door frames, and discloses a civil air defense door frame assembling and welding tool which comprises a workbench, a clamping and assembling mechanism and a welding mechanism, a plurality of table legs are fixedly connected to the periphery of the bottom of the workbench correspondingly, and vertical plates are fixedly connected to the two ends of the top of the workbench correspondingly. The clamping and assembling mechanism comprises a forward and reverse motor fixedly connected to the center of the bottom of the workbench, when a second supporting table is extruded, the second supporting table pushes an extrusion rod, the extrusion rod drives an air pressure plate to move, the air pressure plate extrudes inert gas in a gas box, and the inert gas is conveyed into the gas box; inert gas enters the diffusion hopper through the bent pipe in the gas box, the inert gas is discharged outwards through the diffusion hopper, and the inert gas is diffused through the diffusion hopper, so that the inert gas is sprayed to the welding position of the door frame, and contact between iron in the door frame and oxygen in air is reduced. Therefore, the occurrence of oxidation reaction is reduced, the generation of ferric oxide is reduced, and the working quality of the device is enhanced.

The invention relates to the technical field of road asphalt modification, in particular to an asphalt modifier containing polyethylene and an asphalt mixture prepared from the asphalt modifier. The asphalt modifier containing polyethylene comprises the following components in parts by weight: 8-15 parts of matrix asphalt, 30-50 parts of coal liquefied asphalt, 30-50 parts of pretreated rubber powder, 1-4 parts of a solubilizer, 1-4 parts of a plasticizer and 2-4 parts of waste polyethylene plastic. The asphalt modifier containing polyethylene also comprises a component A: 0.3-3.0 parts by weight of modified basalt fiber. The asphalt modifier containing polyethylene is prepared through a mixing technology, compared with a traditional modifier, basic raw materials of the asphalt modifier are completely derived from solid waste resources, resource utilization of waste is achieved, and the preparation process is simplified.

This invention discloses a method for preparing high-purity oxygen-free copper, relating to the field of metallurgical technology. The method includes multi-stage electrolytic refining, gradient-heating vacuum melting, inert gas-protected refining, electron beam melting, hydrogen plasma arc melting, directional solidification, and post-treatment steps. The multi-stage electrolytic refining utilizes a specific component electrolyte and periodically commutated current; vacuum melting is combined with bidirectional electromagnetic stirring; inert gas-protected refining is combined with a gradient reduction composite covering agent; electron beam and hydrogen plasma arc melting achieve deep purification and deoxidation; and directional solidification and two-stage annealing ensure product performance. The high-purity oxygen-free copper prepared by this invention has a conductivity of 102.3% IACS, a copper content ≥99.9999%, and an oxygen content <1.0 ppm. It exhibits high purity, low oxygen content, and excellent conductivity. The process is stable and controllable, making it suitable for high-end electronics applications.

The invention provides a granulation waste powder separation and recovery method and a pure ceramic powder, comprising the following steps: taking an appropriate amount of granulation waste powder and pouring it into a ball mill, adding alcohol and citric acid; adding grinding balls, ball milling under vacuum conditions, placing after ball milling, using ammonium polyacrylate to fully decompose after placing, and recirculating the following ball milling steps at least five times: ball milling under vacuum conditions, placing after ball milling, using ammonium polyacrylate to fully decompose after placing, and obtaining ball-milled slurry; performing rotary evaporation solid-liquid separation on the ball-milled slurry to obtain rotary evaporation dried powder; secondary rinsing of the rotary evaporation dried powder in isopropanol, and performing rotary evaporation solid-liquid separation on the secondary rinsing powder to obtain pure ceramic powder; organic matter in the waste powder can be effectively removed to obtain pure ceramic powder, which not only reduces the amount of organic matter residue in the recovered powder and meets the standard of secondary use, but also enables the waste powder resources to be effectively recovered and reused.

The invention relates to the technical field of precious metal alloy material manufacturing, in particular to a process for hardening treatment of gold through micro-nano metal powder, which comprises the steps of blank charging, smelting, vacuum ingot casting, surface cleaning, rolling stretching and age hardening, product surface treatment, product welding and the like. The method has the advantages that in the aspect of material selection, the micro-nano metal powder, such as titanium powder and cobalt powder, is diversified and is small in adding amount, various strengthening mechanisms can be provided, and the economical efficiency is guaranteed. The smelting process is accurate, good vacuum and temperature control is achieved, and stirring is uniform after micro-nano metal powder is added. And rapidly solidifying the cast ingot by using a water-cooling copper mold, treating the surface by using aqua regia and the like, and drying. Midway annealing can be executed through rolling and stretching, and the process is flexible. Product manufacturing processes are diversified, and surface treatment includes polishing, electroplating, coloring and the like. Advanced modes such as laser are adopted for welding to avoid hardness reduction. According to the process, the gold hardening treatment effect and quality are improved from multiple aspects, different requirements are met, and wide application prospects are achieved.

The invention relates to an anti-corrosion composition, a coating, a coating and an anode steel claw. The anti-corrosion composition is prepared from the following raw materials: hard clay, kaolin, potassium fluoroaluminate, sodium hexametaphosphate, borax, silica powder and quartz sand. In the anti-corrosion composition, the content of the hard clay is 55 parts by weight to 70 parts by weight, the content of the kaolin is 5 parts by weight to 15 parts by weight, the content of the potassium fluoroaluminate is 5 parts by weight to 10 parts by weight, the content of the sodium hexametaphosphate is 5 parts by weight to 10 parts by weight, the content of the borax is 2 parts by weight to 8 parts by weight, the content of the silica powder is 1 part by weight to 6 parts by weight, and the content of the quartz sand is 1 part by weight to 6 parts by weight. The anti-corrosion composition provided by the invention has excellent high-temperature gas corrosion resistance and thermal shock resistance, so that the anti-corrosion composition is used as a raw material of a coating, and the coating can play a good role in protecting the anode steel claw in aluminum electrolysis.

A bag body is composed of a puncture-proof layer and an antibacterial composite layer, after the puncture-proof layer and an antibacterial inner layer are stacked, the peripheries of the puncture-proof layer and the antibacterial inner layer are fixedly connected in a heat sealing mode, and then a vacuum interlayer is formed between the puncture-proof layer and the antibacterial inner layer. The film layer structure of the stab-resistant layer is composed of a first PET outer layer, a stab-resistant layer and a first PE layer which are compounded in sequence, and the film layer structure of the antibacterial composite layer is composed of a second PET outer layer, an antibacterial layer, an antioxidant layer, a barrier layer and a second PE layer which are compounded in sequence. The puncture-proof layer adopts the composite design of the high-strength first PET outer layer, the special puncture-proof layer and the first PE layer, the capacity of the packaging bag for resisting external impact and penetration of sharp objects is enhanced, internal objects can be effectively protected against physical damage even in a severe environment, and the damage risk in the transportation and storage process is greatly reduced.

The invention relates to the technical field of medicines, and particularly discloses an amisulpride injection and a preparation method thereof. The amisulpride injection is prepared from the following raw materials in parts by weight: 30 to 50 parts of amisulpride, 500 to 700 parts of water for injection, 3 to 5 parts of an antioxidant, 0.5 to 1 part of an osmotic pressure regulator, a pH regulator for regulating the pH value to 4.0 to 7.0 and 100 to 200 parts of a cosolvent, according to the prepared amisulpride injection, the cosolvent and the water for injection are combined, so that the dissolution of the amisulpride is accelerated, the bioavailability of the amisulpride injection is improved, and meanwhile, the antioxidant and the osmotic pressure regulator are combined, so that the stability and the oxidation resistance of the amisulpride injection are improved.

The invention relates to the technical field of heating paste production, in particular to heating paste and a preparation process thereof. The invention discloses a ginger root soap, which is prepared from the following raw materials in parts by weight: 55 to 65 parts of water, 5 to 10 parts of glycerol, 3 to 8 parts of propylene glycol, 2 to 4 parts of ginger root extract phospholipid nanoparticles, 2 to 4 parts of cinnamon extract, 1 to 3 parts of polyethylene glycol, 2 to 5 parts of PEG-40 hydrogenated castor oil, 2 to 5 parts of hydrogenated polyisobutene, 0.5 to 1.5 parts of carbomer, 0.5 to 1 part of triethanolamine and 0.5 to 1 part of phenoxyethanol. The composition is prepared from the following components in parts by weight: 0.5 to 1.5 parts of chitosan, 0.1 to 0.5 part of essence, 0.1 to 0.5 part of vanillyl butyl ether, 0.5 to 1 part of ethylhexylglycerin and 0.5 to 1 part of pepper seed oil. The ginger root extract is subjected to enzymolysis through protease, release of active ingredients such as gingerol is promoted, and the heating performance of the heating paste is enhanced; and the phospholipid nano-load enzymolysis ginger root extract is utilized to reduce the oxidation of gingerol and other components and maintain the heating effect.

This invention discloses a method for increasing shale gas production from multi-stage fracturing shale formations. First, water containing water-absorbing resin is intermittently injected into the shale gas well, impacting the shale layer and creating multiple fractures, forming a primary fracturing process. Next, liquid nitrogen and sodium particles are injected into the shale gas well. The resin, already saturated with water, remains within the fractures. At this point, the liquid nitrogen cools the shale layer below its freezing point, causing the saturated resin to freeze and rapidly expand, forming a secondary fracturing process. Then, as the injected liquid nitrogen continues to vaporize, it further freezes the water and water-absorbing resin adsorbed by the shale, forming a tertiary fracturing process. When the temperature of the shale layer exceeds its freezing point, the expanded ice on the water-absorbing resin melts into water. At this point, the sodium particles react with the water, releasing a large amount of heat, causing the shale layer temperature to rise rapidly, creating a thermal shock to the low-temperature shale layer, forming a quaternary fracturing process. This completes the multi-stage fracturing process of the shale layer, effectively improving the extraction efficiency of shale gas.

The invention belongs to the technical field of friction stir welding equipment, and particularly relates to horizontal friction welding equipment and a process thereof. The horizontal friction welding equipment comprises a placing table and a friction welding machine, a fixing table is slidably connected to the upper side of the placing table, a welding head mechanism protection shell is arranged in the friction welding machine, a friction welding mechanism is arranged on the welding head mechanism protection shell, and the friction welding mechanism comprises a mounting base; and the mounting seat is fixedly connected in the welding head mechanism protection shell. According to the horizontal friction welding equipment and the horizontal friction welding process, through the use of the friction welding mechanism, after a stirring needle abuts against a workpiece and penetrates into the workpiece, a protection ring extrudes a compression spring, and the protection ring is tightly attached to the surface of the workpiece, so that the oxidation reaction of air and the heated workpiece in the friction welding process of the stirring needle can be greatly reduced, and the mixing of oxides is reduced; and meanwhile, after the protection ring extrudes and compresses the spring, the depth of the stirring needle penetrating into the workpiece can be adjusted, and it is guaranteed that the workpiece is stably welded.

The plant protection pesticide box comprises a plant protection pesticide box body, the center of the inner bottom of the plant protection pesticide box body is fixedly connected with the bottom end of a net cylinder, a cavity is formed in the net cylinder, the outer side of the net cylinder is fixedly connected with one side of a partition plate, the number of the partition plate is four, and the partition plate is fixedly connected with the bottom end of the net cylinder. The other sides of the four partition plates are fixedly connected with the four inner walls of a plant protection pesticide box body correspondingly, a containing groove is formed in the plant protection pesticide box body and divided into four parts through the four partition plates, and plastic permeable membranes are arranged on the top end faces of the four containing grooves. Pesticide with the bottle opening opened is placed in the containing groove of the plant protection pesticide box body, sterilization, disinfection and deodorization can be conducted on the pesticide through the ultraviolet lamp and the deodorization ball placed in the net cylinder, and then the sealed top cover is buckled to achieve the sealing effect on the interior of the plant protection pesticide box body. Air circulation is avoided, so that oxidation reaction between the pesticide and oxygen in the air is reduced, and stinking and deterioration of the pesticide are avoided.

According to the dynamic controlled atmosphere fresh-keeping transportation structure and the fresh fruit compression-resistant transportation device, the concentration of ethylene gas generated by fruits in a fruit box is monitored through a gas monitor, the position of the fruit box is determined, a rotating motor drives a gas outlet plate to swing in the direction where the fruit box is located, the oxidation reaction between the fruits and oxygen is reduced, and the safety of the fruits is improved. And meanwhile, more ethylene is prevented from being generated by accumulation and self-promotion of ethylene, and generation of ethylene gas is reduced. The device is characterized in that the device is composed of a gas monitoring assembly and a dilution assembly, and the gas monitoring assembly is composed of a trapezoidal fixing piece, an L-shaped connecting arm, a first connecting shaft, a rotary supporting plate, a first hinge piece, a fruit box, a gas monitor, breathable micropores, a supporting plate, a nitrogen gas cylinder and a connecting rod; the releasing assembly is composed of a connecting rotating shaft, an air outlet plate, an arc-shaped sliding groove, a connecting shaft, a fixing piece, a rotating motor, a rotating shaft, a fixing shaft, a wear-resisting rope, an air outlet, a vent valve and a connecting pipe.

The invention discloses an automatic production process for a magnesium alloy workshop, and relates to the technical field of magnesium alloy preparation, the automatic production process comprises a melting chamber, a pouring chamber, a wagon balance, a die-casting workshop and a slag smelting chamber, the melting chamber comprises a melting furnace, a melting chamber intelligent travelling crane, an AGV, a crucible and a dust hood, and the wagon balance is installed in the center of the bottom wall of the workshop; the die-casting workshop is composed of die-casting equipment and a machine edge furnace, and the pouring chamber is composed of a pouring machine and a magnesium ingot conveying belt. Automatic transfer of molten metal in the magnesium alloy workshop is achieved through the multiple intelligent travelling cranes and the AGV, the crucible is directly transported to the pouring chamber or the die-casting workshop, direct supply of magnesium water in the die-casting workshop is creatively achieved, and the technological process of the magnesium alloy production workshop is shortened; the layout of a magnesium alloy workshop is optimized, the conventional low-efficiency working mode of manually connecting nodes is abandoned, the production cost is greatly reduced by direct supply of the magnesium water, the die casting quality is improved while the production efficiency is improved, and the heat loss in the magnesium water cooling, preheating and remelting processes is reduced.

The invention discloses a continuous treatment system and method for low-temperature small cresol in coal gasification, and relates to the technical field of treatment systems, and the continuous treatment system comprises an alkali washing unit, an oxidation deodorization unit, a decoloration deodorization unit, an anti-oxidation unit, a rectification unit and an improvement unit. According to the continuous treatment system and method for the medium-low-temperature small cresol in coal gasification, through cooperative arrangement of the alkali washing unit, the oxidation deodorization unit, the decoloration and deodorization unit, the anti-oxidation unit, the rectification unit and the improvement unit, the effects of desulfurization, denitrification, decoloration, deodorization, organic matter removal and anti-oxidation on the medium-low-temperature small cresol in coal gasification can be achieved; the quality of phenol, o-cresol, m-cresol, p-cresol and xylenol products separated from medium and low temperature small cresol is greatly improved, the product quality is ensured, meanwhile, the stability of the products in the coal gasification medium and low temperature small cresol refining process is changed, and the oxidation resistance is improved.

The invention discloses an anti-oxidation production process of apple juice, which comprises the following steps: carrying out whole-process control such as cleaning, crushing, squeezing, storing and sterilizing on apples in a low-temperature environment so as to inhibit oxidation reaction and bacterium breeding; in the cleaning process, ozone water and RO water are adopted for fine cleaning, so that the cleaning and sterilizing effects of the apples are ensured; apples are crushed and oxygen is isolated through the crushing adsorption machine with a parallel blade structure; the totally-closed squeezing cavity is adopted for squeezing, and fruit juice oxidation is reduced; in the whole production process, air is isolated through nitrogen protection, and oxidation is delayed; the fruit juice is conveyed to a low-temperature storage tank and sterilized by adopting an HPP ultrahigh-pressure cold sterilization technology, so that the freshness, the taste and the flavor of the fruit juice are ensured; finally, the quality of the juice is preserved through cold-chain transportation; the invention solves the problem of oxidation discoloration of the apple juice caused by oxidase reaction in the existing juice production process, provides an effective anti-oxidation technology, and ensures the quality and stability of the apple juice.

The utility model provides a kind of double-chamber double-pressurization quantitative furnace, including lifting furnace frame, lifting furnace frame top surface is connected with furnace body, furnace body includes main furnace chamber and quantitative chamber, and main furnace chamber and quantitative chamber are communicated by liquid inlet valve between;Quantitative chamber top opening is connected with quantitative chamber cover, quantitative chamber cover is connected with vacuum pump and delivery pipe, the delivery pipe is equipped with liquid outlet control valve, and liquid outlet control valve controls delivery pipe opening or closing;Quantitative chamber is pumped by vacuum pump or pressurization, and delivery pipe sends out aluminium liquid from quantitative chamber.When quantitative chamber is pumped by vacuum pump, aluminium liquid flows from main furnace chamber to quantitative chamber by liquid inlet valve;When quantitative chamber is pressurized by vacuum pump, aluminium liquid in quantitative chamber is sent out from delivery pipe.The utility model sets up main furnace chamber and quantitative chamber, realizes fast and accurate soup by controlling vacuum pump forward and reverse, satisfies high frequency, mass production demand, sets up chute as tubular, reduces aluminium liquid and air contact, reduces oxidation reaction, improves product quality.

The invention relates to an automotive anti-aging recycled polypropylene composite material with good appearance and a preparation method thereof, and the automotive anti-aging recycled polypropylene composite material with good appearance is prepared from the following components in percentage by weight: 10%-90% of a recycled polypropylene mixture, 5%-70% of polypropylene, 1%-25% of a toughening agent, 1%-22% of a filler, 0.2%-0.5% of a weather-proof agent, 0.1%-0.8% of an antioxidant and 0.1%-0.2% of a long-acting antioxidant, 0.1%-1.5% of modified epoxy resin, 0.1%-1.0% of metal deactivator and 0.1%-0.25% of metal carbonate hydrate. The automotive anti-aging recycled polypropylene composite material with good appearance has good heat aging resistance and light aging resistance, has no bad phenomena such as pocking marks, bumps and the like, and meets the use requirements of automobiles.

The invention discloses a high-conversion-rate solar cell and a preparation method and application thereof. According to the invention, a layer of silicon carbide film is plated on the surface subjected to phosphorus doping after laser heavy doping, so that a PN junction is not damaged, meanwhile, a good passivation effect on a silicon wafer is achieved, and the conversion efficiency is improved. The silicon carbide layer is formed on the surface of the silicon wafer, so that the high-temperature resistance and the mechanical property of the surface of the silicon wafer are enhanced, and the service life of the silicon wafer is prolonged; the corrosion resistance of the surface of the silicon wafer is improved, and the stability of the silicon wafer in a severe environment is enhanced; the oxidation reaction on the surface of the silicon wafer is reduced, and the performance reduction caused by oxidation is avoided.

The invention provides a hydraulic valve bank with a sealing detection function, which belongs to the technical field of hydraulic valve banks and comprises a valve block, a plurality of valve bodies, a sealing box and a cooling block, according to the hydraulic system, leaked hydraulic oil is temporarily stored through the arranged sealing assembly, so that the situation that the hydraulic oil flows out from a leakage point to the outer side irregularly and unlimitedly to pollute the surrounding environment is avoided, the leaked hydraulic oil is pushed back through the compensation assembly, and part of the leaked hydraulic oil returns to the hydraulic system again; in this way, pressure loss of the hydraulic system is reduced, the alarm assembly gives an alarm when the sealing assembly and the compensation assembly reach the maximum bearing capacity, secondary leakage of the sealing assembly is avoided, the cooling assembly enables all parts of hydraulic oil to be in uniform contact, cooling uniformity is guaranteed, and the service life of the hydraulic system is prolonged. A plurality of through holes are formed in the cooling block to accelerate the cooling process, so that over-high oxidation speed of hydraulic oil caused by over-high oil temperature is avoided, and the service life of the hydraulic oil is prolonged.

This invention relates to the field of comprehensive utilization technology of iron and steel smelting resources, specifically to a method for the direct recycling and utilization of iron-rich red mud in converter steelmaking. The method includes the following steps: Step 1: Retaining slag, including MgO, in the converter for slag splashing and furnace protection; Step 2: Adding fine-grained limestone to the converter; Step 3: Adding iron-rich red mud to the converter, and shaking the converter 2-3 times after the mud has been added; Step 4: Verticalizing the converter and blowing nitrogen into it at least once using a top-blowing method, with each blowing lasting 3-5 seconds and an interval of 10 seconds between each blowing; Step 5: Adding scrap steel to the converter, waiting 0-5 minutes, then adding molten iron and starting the blowing process. This invention directly applies iron-rich red mud to the converter steelmaking process, achieving dephosphorization of molten iron with high phosphorus content without the use of flux.