44results about How to "Reduce gas content" patented technology

The invention discloses lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with yield strength of 400MPa. The lanthanum-cerium mixed rare earth corrosion-resistant twisted steel comprises the following elements: 0.10 to 0.20 percent of C, 0.25 to 0.80 percent of Si, 0.90 to 1.60 percent of Mn, 0.020 to 0.045 percent of V, 0.003 to 0.010 percent of Ti, less than or equal to 0.010 percent of P, less than or equal to 0.010 percent of S, 0.25 to 0.65 percent of Ni, 0.25 to 0.70 percent of Cr, 0.10 to 0.18 percent of RE, less than or equal to 0.20 percent of Cu, less than or equal to 0.004 percent of O, less than or equal to 0.006 percent of N and the balance of Fe and inevitable impurities. The invention further discloses a production method of the lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with the yield strength being 400 MPa. The production method comprises the working procedures of converter smelting, argon blowing refining, LF furnace refining, continuous casting and rolling, and the lanthanum-cerium mixed rare earth reinforced alloy cored wire and the silicon-calcium wire are fed into molten steel in the argon blowing refining process. The components, inclusions and mechanical properties of the produced 400 MPa-grade lanthanum-cerium mixed rare earth steel bar completely meet the technical requirements of the steel bar, the quality control requirement is met, and the 400 MPa-grade lanthanum-cerium mixed rare earth steel bar has the advantages of being high in strength, high in plasticity, resistant to corrosion and the like. The service life of the steel is prolonged, coating and galvanization are avoided, the burden of environmental protection is relieved, and reasonable application of resources is facilitated.

The invention relates to the technical field of coal rock dynamic disaster prevention and control, in particular to a rock burst, gas outburst and dust composite disaster integrated prevention and control method which mainly comprises the steps that firstly, a plurality of pressure relief holes are drilled in a coal body in a transportation crossheading and an air return crossheading, gas extraction is carried out on the pressure relief holes, then secondary drilling is carried out on the pressure relief holes, and the gas outburst and dust composite disaster integrated prevention and control method is obtained. And deep gas extraction holes and deep coal seam water injection holes are formed, then gas extraction of the deep gas extraction holes and water injection of the deep coal seam water injection holes are conducted at the same time, and finally grouting plugging is conducted. According to the method, preliminary pressure relief is conducted on the coal body, gas accumulation of coal rock mass at the shallow portion of the roadway is reduced, then deep gas extraction and water injection are conducted at the same time, and deep gas extraction and deep coal seam water injection of the coal face can intersect and cooperate with each other in the coal body; the effects of extracting gas from a deep coal seam, wetting and softening the coal body and improving the physical and mechanical properties of the coal and rock mass are more effectively achieved, and pressure relief-extraction-water injection integrated prevention and control are achieved.

The invention relates to a die-casting forming method for improving the density of a casting, belongs to the technical field of aluminum alloy casting, and solves the problems of high porosity, low density and low mechanical property of an aluminum alloy thick-wall die casting in the prior art. A die-casting forming method for improving the density of a casting comprises the following steps that firstly, an aluminum alloy metal raw material is added into a preheated smelting furnace, melting and heating are conducted, aluminum alloy liquid is obtained, and a refining modifier is added and stirred; 2, degassing treatment is conducted on the aluminum alloy liquid, and surface scum is removed after standing; 3, a die-casting die is preheated, and a layer of release agent is sprayed on the die-casting die; 4, the molten aluminum alloy is cooled and poured into a pouring gate of the die-casting die, the thickness of the pouring gate is 8-12 mm, and the molten aluminum alloy is slowly injected into a cavity of the die-casting die through an injection punch; and 5, the aluminum alloy die casting is taken out, the die casting is placed in a water tank to be quenched, and the high-density die casting is obtained. And preparation of the high-density aluminum alloy thick-wall die casting is achieved.

The invention relates to CO2 corrosion resistant steel as well as a preparation method and a steel product thereof. The CO2 corrosion resistant steel comprises the following chemical components in percentage by mass: 0.10%-0.16% of C, 0.15%-0.40% of Si, 0.50%-0.70% of Mn, 4.90%-5.50% of Cr, 0.25%-0.80% of Mo, 0.02%-0.04% of Al, less than or equal to 0.020% of P, less than or equal to 0.01% of S, less than or equal to 0.15% of Cu, less than or equal to 0.20% of Ni and the balance of iron and inevitable impurities. According to the CO2 corrosion resistant steel, on the basis that Cr, Mo and Al are added, harmful elements such as P and S are reduced, the content of gases such as O, N and H is reduced, the alloying proportioning principle is fully utilized, the obdurability matching of all the elements is excellent, and the mechanical property and CO2 corrosion resistance of a product are improved; and meanwhile, through cooperation of Mo and Cr elements, the corrosion resistance of the steel can be improved, use of precious metal can be reduced, and the preparation cost is reduced.

The utility model is applicable to the technical field of coating, and provides a coating device and a battery production line, the battery production line comprises a container for storing coating liquid, an injection pump, a coating tool bit, a conveying channel and a degassing unit, the container is connected with the injection pump through the conveying channel, the injection pump is connected with the coating tool bit, and the degassing unit is arranged on the conveying channel. The degassing unit is used for carrying out gas removal on the coating liquid, and the injection pump is used for conveying the coating liquid, so that the gas content in the coating liquid can be reduced, and the uniformity of the coating liquid coated on the substrate can be improved.

The utility model relates to a plate type heat exchanger unit which comprises a placing seat, a left pressing plate, a right pressing plate and a plurality of plate sheets, a high-temperature water inlet pipe and a high-temperature water outlet pipe are arranged on the left pressing plate, and a low-temperature water inlet pipe and a low-temperature water outlet pipe are arranged on the right pressing plate; the left pressing plate and the right pressing plate are arranged on the placing seat; an annular groove is formed in one side of the plate piece, an annular boss is arranged on the other side of the plate piece, and the shape of the annular boss is matched with that of the annular groove. During fitting, the annular bosses are inserted into the annular grooves in the adjacent plate sheets; the locking mechanism comprises a screw rod, a screw head, a pressure spring, a fastening nut and a backing ring; the screw head is fixed at one end of the screw rod; the screw rod penetrates through the through hole; the compression spring, the backing ring and the fastening nut are arranged at the other end of the screw in a sleeving mode, one end of the compression spring abuts against the side face of the left pressing plate or the side face of the right pressing plate, and the other end of the compression spring abuts against the backing ring; the problems of loose connection and leakage between the plates caused by alternate cooling and heating and thermal expansion and cold contraction of the plates are solved.

The invention discloses a method for pre-extracting coal seam gas by combining high-density well spacing with small-scale hydraulic fracturing, and belongs to the technical field of coal seam gas ground pre-extraction outburst elimination. The method comprises the following steps: deploying a plurality of ground gas extraction vertical wells and directional wells with two-opening well bore structures in a coal face according to a square well pattern with the distance between targets being 50-60m, tripping in a sleeve after drilling a two-opening well section, and packing an annular channel between the lower part of the sleeve and a well wall by using a packer outside the sleeve, so that a closed space is formed at the lower part of the gas extraction well; after small-scale hydraulic sand fracturing, overflow releasing and well flushing of a pre-exploited coal seam are carried out on the ground in a light casing pipe injection mode through small fracturing equipment, drainage and mining equipment such as an electric submersible pump and an underground pressure meter are put into a casing pipe, and drainage gas production and negative pressure gas extraction operation are carried out in sequence. By means of the method, low-cost and rapid pre-drainage of coal seam gas of the coal face can be achieved, the gas outburst risk in the coal roadway tunneling and working face stoping process is remarkably reduced, and economic, environmental and social benefits are achieved.

The invention discloses a method for pre-pumping coal face gas of a directional inclined shaft staged fracturing coal seam, and belongs to the technical field of ground pre-pumping outburst elimination of gas in a coal mine area. A plurality of directional inclined shafts with second-opening well body structures are constructed on the ground with the plane distance of a mining coal seam drilling section being 60-80 m, second-opening well sections enter the coal seam from the position of a coal face air return roadway, and drilling is completed after the second-opening well sections are drilled to the position of a transportation roadway along the coal seam; a pre-punching wall protection casing pipe is tripped in, an annular channel between the casing pipe and the well wall is sealed through a plurality of external pipe packers, and a plurality of separated spaces are formed in the mining coal seam drilling section; small fracturing equipment is utilized on the ground to carry out coal seam mining small-scale segmented hydraulic fracturing in an oil pipe single-seal injection mode, drainage and mining equipment such as an electric submersible pump is put into a casing pipe after a well is dredged and washed, and drainage gas recovery and negative pressure extraction operation are carried out. According to the method, low-cost and rapid pre-drainage of coal seam gas of the coal face can be achieved, the gas outburst risk in the recovery process of the coal face is remarkably reduced, and the method has both environmental and social benefits.

The utility model provides a precious metal forming device. The precious metal forming device comprises a closed cavity, a vacuum mechanism and a drainage rod, a first discharge hole is formed in the bottom end of the closed cavity; the closed cavity is connected with the vacuum mechanism in a sealing manner; one end of the drainage rod is arranged at the first discharge port, and the other end of the drainage rod is arranged on the cutting device. According to the precious metal forming device provided by the utility model, oxygen and other gases which are easy to generate oxidation-reduction reaction in the molten precious metal are removed under the vacuum condition, so that the oxidation reaction is avoided, and the influence on the subsequent processing of products is avoided.

The present invention relates to the technical field of chlorine impurity removal, and proposes a device for reducing impurity gases in chlorine, comprising: a decomposition tank, having a liquid inlet and an exhaust port, the liquid inlet is used to pass through light salt water, and the exhaust port is used to discharge wet chlorine; a steam coil, arranged at the bottom of the inner side of the decomposition tank, and the steam coil is used to provide the heat required for the decomposition reaction; a drying tower, having a concentrated sulfuric acid inlet and a wet chlorine inlet, a packing layer in the drying tower, and a filler in the packing layer, and the filler is used to disperse the concentrated sulfuric acid and wet chlorine; a vibrating member, having a power unit, the power unit is facing the wet chlorine inlet, and after the wet chlorine inlet is passed through the wet chlorine, the power unit drives the vibrating member to move. Through the above technical scheme, the problem of poor chlorine drying effect in the drying tower in the prior art is solved.

The present invention relates to the field of casting and forming technology, and discloses an umbrella skirt casting and forming device and a large umbrella skirt insulator, comprising a main body, wherein the four top corners of the main body are fixedly connected with electric push rods, the four electric push rods are fixedly connected with an upper mold on the side away from the main body, the side of the main body close to the electric push rods is fixedly connected with a lower mold, and the back outer wall of the lower mold is fixedly connected with a motor. In the present invention, since the flow rate and pressure of the liquid are relatively large, when the liquid is sprayed, the sprayed liquid will cause the shaking tube to shake irregularly. When the shaking tube shakes irregularly and sprays the liquid, the shaking of the shaking tube can make the sprayed liquid evenly distributed in the mold, and in the corners and grooves in the mold, so as to avoid the situation that the sprayed liquid is difficult to be evenly distributed in the mold due to the difficulty in adjusting the angle and direction of the spray during casting, resulting in defects in the mold after molding or gaps in the finished product, affecting the molding effect.

The hot-rolled wire rod for the blasting lead comprises the following chemical components in percentage by mass: 0.03 to 0.06 percent of C, less than or equal to 0.030 percent of Si, 0.20 to 0.30 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.100 percent of Cr, less than or equal to 0.100 percent of Ni, less than or equal to 0.100 percent of Cu, less than or equal to 0.0070 percent of N and the balance of iron and other inevitable impurities. The invention further relates to a production method of the hot-rolled wire rod for the blasting lead, the production method comprises a smelting process and a rolling process, and the smelting process comprises the steps of KR desulfurization and slagging-off, converter smelting, LF refining and continuous casting. The steel wire rod for the blasting lead produced through the production method is good in mechanical property, the customer drawing machining process performance is excellent and stable, and the manufactured 0.55 mm blasting lead is good in resistivity and conductivity.

The application relates to a preparation method of a ferrite-martensite dual-phase steel, which comprises the steps of converter smelting, LF furnace refining, RH refining, tundish treatment and continuous casting, and through controlling specific parameters in each existing step, cooperating with the setting of a continuous casting protective slag and the specific smelting steel grade component content, the ferrite-martensite dual-phase steel can reduce the steel slag reactivity and has good lubricity in the continuous casting process, so that the continuous casting is ensured to be smooth.

The application discloses a kind of high-purity rare earth weathering bridge steel manufacturing method, comprising the following steps: S1, preparing raw materials;S2, impurity analysis and preparation;S3, vacuum induction furnace initial refining N;S4, vacuum induction furnace first material and refining;S5, vacuum induction furnace second material and charging adjustment;S6, vacuum induction furnace temperature adjustment and Ce;S7, cooling to form alloy ingot.The application uses vacuum electromagnetic induction melting process, improves alloy purity through high-purity raw materials and reasonable preparation process and process parameter control, and adds rare earth elements, and then significantly improves the strength, tensile and weathering performance of bridge steel.

The invention belongs to the technical field of flue gas treatment, and particularly relates to a smelting furnace flue gas treatment device which comprises a protective outer cylinder, a drainage component is arranged at the axis of the inner wall of the protective outer cylinder, and a flow transfer component is arranged in the middle of the inner wall of the protective outer cylinder; the protection outer cylinder comprises a heat insulation shell, external hanging brackets are symmetrically arranged on the front side and the rear side of the outer surface of the heat insulation shell, and the whole device can be hung at a preset position through the external hanging brackets; the drainage component comprises a dissolving long tube, and the upper portion of an inner cavity of the dissolving long tube is rotationally connected with a segmented rotating sleeve. The device can neutralize and filter out solid particles and acidic pollution gas in flue gas by dissolving an alkaline solution in the long pipe to achieve the flue gas purification effect, compared with a common filter device, the problem that a filter element is blocked can be avoided, in the reaction process, a stirring rotating plate can provide stirring work, and the reaction efficiency is improved. And the flue gas reacts with the alkaline solution as much as possible, so that the problem of insufficient flue gas reaction is avoided.

The utility model discloses a motorcycle outer covering part injection mold with a cavity efficient exhaust system, which relates to the technical field of injection molds and comprises a lower mold, an upper mold and an exhaust component. An upper mold is installed above the lower mold, an exhaust assembly is installed between the lower mold and the upper mold, multiple sets of mold cavities are formed in the lower mold, multiple sets of injection molding cavities matched with the mold cavities are formed in the lower surface of the upper mold, the exhaust assembly comprises an exhaust plate, and an exhaust channel is formed in the outer wall of the exhaust plate. An exhaust extension frame is installed at the position, close to the die cavity, of the exhaust channel, and a plurality of exhaust through holes communicating the die cavity with the exhaust channel are formed in the outer wall of the exhaust extension frame. The problems that when an existing injection mold is used, although the existing injection mold is provided with an exhaust structure, the whole mold needs to be greatly changed through the exhaust structure, the mold needs to be rebuilt, and the cost is high are solved.

The utility model discloses a generator sealing oil vacuumizing system which comprises a vacuum oil tank, an oil-gas separator, a vacuum pump and a first oil return pipeline, and the vacuum oil tank is communicated with a generator through a circulation loop; the oil-gas separator is communicated with an exhaust port of the vacuum oil tank through an exhaust pipeline; the vacuum pump is communicated with an exhaust hole of the oil-gas separator through an air suction pipe; one end of the first oil return pipeline is communicated with the bottom of the oil-gas separator, and the other end of the first oil return pipeline is communicated with the vacuum oil tank; and the oil-gas separator is higher than the vacuum oil tank. According to the sealing oil vacuumizing system of the generator, the stability of the vacuum degree in the vacuum oil tank is guaranteed, and the oil-gas separation efficiency in the vacuum oil tank is improved.

The application discloses a preparation method of high-density low-oxygen low-inclusion copper-chromium alloy contact material, which uses copper-tellurium alloy rods and high-purity degassed chromium blanks as raw materials, adopts high-purity rare earth lanthanum with a purity of 99.99%, and adopts a vacuum induction melting process to improve the uniformity and grain refinement degree of the copper-chromium-tellurium alloy, wherein the tellurium element is added in the form of copper-tellurium alloy rods, so that the volatilization of tellurium can be reduced, the uniformity of tellurium in the alloy ingot is ensured, and the copper-tellurium phase particle size is refined; the high-purity degassed chromium blank is used as the raw material to reduce the gas content and impurity content of the alloy ingot; the addition of the rare earth material La reduces the gas content of the alloy ingot and the metallographic impurity elements, and is beneficial to improving the comprehensive use performance of the copper-chromium-tellurium contact material; and the copper-chromium alloy prepared by the method has low gas content, dense structure, uniform composition, high purity, and is a high-quality and high-performance vacuum switch contact material.

The utility model discloses a direct current oil pump start-stop control structure for a steam turbine, which relates to the technical field of oil pump start-stop control, and comprises a control base, an evacuation mechanism is arranged at the upper end of the control base, and the evacuation mechanism comprises a suction assembly which is arranged at the upper end of the control base and comprises two groups of fixing frames fixedly arranged at the upper end of the control base; suction cylinders are fixedly connected to one sides of the two sets of fixing frames, pistons are slidably mounted on the inner walls of the suction cylinders, push-extension rods are fixedly connected to the upper ends of the pistons, pull rods are fixedly connected to the top ends of the push-extension rods, external threaded pipes are connected to the lower ends of the suction cylinders in an intercommunication mode, and threaded sleeves are connected to the outer walls of the external threaded pipes in a threaded mode. The ventilation assembly is arranged on the inner side of the suction assembly, and the problems that gas still exists in a gap between a protection box of an existing start-stop control structure for the oil pump and a control device body, the gas possibly has high humidity, and once the humidity exceeds a certain threshold value, an electric control element is affected are solved.

The utility model provides an exhaust assembly of packaging bag production equipment, which belongs to the field of packaging bag production equipment, and comprises an equipment main body and a transmission mechanism, a support frame is arranged above the equipment main body, the support frame is connected with a row brush which is vertically arranged downwards, the bottom of the equipment main body is provided with a support plate, and the support plate is connected with the transmission mechanism. The supporting plate and the row brush are oppositely arranged in the vertical direction, a liftable power device is arranged at the bottom of the supporting plate, the row brush and the supporting plate are arranged between transmission roller shafts distributed at intervals, the row brush is made of hard brush materials and detachably connected with the supporting frame through screws and nuts, and leveling assemblies are arranged on the two sides of the equipment body. Through mutual cooperation of the row brush and the supporting plate, the contact area of the exhaust assembly and the bag can be increased, the exhaust efficiency is improved, the gas content in the bag is effectively reduced, packaging bag bundles are more compact and not prone to deformation, the bag is not prone to breakage, the product quality can be further improved, and the equipment reliability is improved.

This application relates to the technical field of ring main units, and discloses a primary and secondary integrated ring main unit with an adaptive intelligent anti-condensation system. The unit includes a housing with a placement slot, a cable compartment, and a control compartment. A first heat dissipation hole communicating with the placement slot is located on the side of the housing. A fan is located within the placement slot. The control compartment communicates with the first heat dissipation hole. A movable pipe communicating with the placement slot is located within the cable compartment, with the opening of the movable pipe located on the side of the control compartment near the fan. This application utilizes the mixing of outside air with humid air from the cable compartment. On one hand, the humid air directly participates in the heat exchange of the heating elements in the control compartment, carrying away heat. On the other hand, water vapor in the mixed gas, when flowing past the heating elements, can also absorb some heat due to its phase change (if it occurs) or its high specific heat capacity, further improving the heat dissipation effect of the control compartment.

The invention provides an ultrahigh heat conduction and corrosion resistance magnesium alloy and a preparation method thereof. The ultrahigh heat conduction and corrosion resistance magnesium alloy is an Mg-Zn-Ca-RE alloy system. Wherein RE is a rare earth element, the content of RE is 0.3-0.5 wt.%, the content of Zn is 4.5-5.5 wt.%, the content of Ca is 0.05-0.1 wt.%, and the balance is Mg and unremovable impurities. RE is at least one of La, Ce and Sm. According to the preparation principle, smelting, semi-continuous casting, annealing, extrusion cogging and graded rolling treatment are carried out, and the ultrahigh-heat-conduction corrosion-resistant magnesium alloy with high strength, high heat conduction performance and excellent corrosion resistance can be obtained.

The present invention belongs to the technical field of prefabricated component production, specifically a continuous production equipment for prefabricated concrete components, including: a support frame detachably mounted on the edge of one side of a cement component processing table; a water source drop tank detachably mounted on the outer surface of the top of the support frame; a lap plate detachably mounted on the middle position of the top of the cement component processing table and located on the edge of one side of the support frame; and a stripping guide table arranged on the edge of the other side of the cement component processing table. Under multiple rotations of the present invention, the cement slurry is driven by the water source and the action of inertia, and some bubbles inside the cement mortar will be gradually squeezed out from the inside of the mortar under the continuous stirring of the mortar, and the discharged gas will be discharged through the water leakage hole, thereby reducing the gas content inside the mortar as much as possible, and preventing the cement mortar from carrying a large amount of gas into the inside of the cement mortar when filling.

The invention relates to water-based latex as well as a preparation method and a construction method thereof, and belongs to the technical field of sealing materials. The main film-forming substance in the water-based latex is the styrene-butadiene latex, a layer of compact styrene-butadiene rubber film can be formed after curing, and the film-forming effect is achieved. Hydroxyethyl cellulose plays a crucial role in latex, and the hydroxyethyl cellulose can act with latex particles due to good emulsification and suspension properties, so that the particles can be uniformly dispersed in the latex. In addition, the hydroxyethyl cellulose can also reduce the occurrence of a sedimentation phenomenon and promote the emulsion to maintain the form and the stability of the emulsion. The water-based latex product which is stable in form, low in gas content and not prone to deterioration can be formed by adding the defoaming agent and the degerming agent through the synergistic effect of the raw materials. After being used, the sealant can form a compact rubber film layer, has excellent sealing performance, can effectively block the permeation of gas and moisture, has a good film-forming effect, has good leveling property during spraying construction, and is not easy to have a sagging phenomenon.

The application relates to the technical field of new energy automobile battery replacement, and specifically discloses a lock body mechanism for new energy automobile battery replacement, which comprises a fixed shell, a nut connected to the inner side of the lower end of the fixed shell through a bearing, and a clamping spring arranged in the inner side of the lower end of the fixed shell. A drop-proof ring is in contact with and supports the upper surface of the clamping spring. A supporting spring is arranged on the outer side of the nut between the upper surface of the drop-proof ring and the lower surface of the upper end of the nut. A pneumatic sealing mechanism is installed on the nut. The upper end of the fixed shell is fixedly connected with a guide pipe coaxial with the fixed shell. The inner side of the guide pipe is provided with guide grooves at equal angles. A fixing bolt penetrates through the guide pipe. The application can prevent dust and sand from entering the thread structure between the fixing bolt and the nut, thereby ensuring that the fixing bolt and the nut can stably and effectively work.

The utility model provides a gas barrier structure of an RTP pipe, and aims to solve the technical problem that the service life of the RTP pipe is shortened due to the fact that a reinforcing layer is easy to corrode when the existing RTP pipe is used. The structure comprises: an inner tube; the blocking layer is arranged on the outer side of the inner pipe; the reinforcing layer is arranged on the outer side of the barrier layer; the protective layer is arranged on the outer side of the reinforcing layer; wherein the blocking layer and the inner pipe are connected through a first connecting structure, and the first connecting structure comprises an adhesive layer and a grid layer arranged in the adhesive layer. According to the RTP pipe, the blocking layer is additionally arranged between the inner pipe and the reinforcing layer, and the blocking layer can reduce the content of gas such as HS2, CO2 or water permeating into the reinforcing layer, so that the corrosion of the reinforcing layer is obviously improved, the reinforcing layer is well protected, and the service life of the RTP pipe is prolonged.

The invention relates to a lysine production technology, which is used to solve the problem that too many bubbles in lysine production lead to changes in microbial metabolites and reduced lysine product output. The invention specifically relates to a lysine production device with a defoaming structure, comprising a processing tank. The invention reduces the gas content in the production material by squeezing bubbles in a production material during the rotation of a first defoaming tube and a second defoaming tube, and accelerates the flow rate of the production material at the position of a defoaming hole by rotating a rotating ring during the rotation of the first defoaming tube and the second defoaming tube, thereby improving the defoaming efficiency. The heating operation generated by stirring inside a heating box reduces the gas content in the liquid after the liquid temperature is increased, and the liquid discharged into a water storage tank after heating is gas-discharged again under a low-pressure environment, thereby further reducing the gas content in the liquid, thereby reducing the influence of the gas content in the liquid on the generation of more bubbles during lysine production.

The application discloses a TiAl alloy valve blank and a preparation method thereof, and belongs to the technical field of alloy material processing. The TiAl alloy valve blank preparation method comprises the following steps: preparing a TiAl alloy extrusion blank; heating the TiAl alloy extrusion blank and placing the TiAl alloy extrusion blank in a preheated extrusion die for extrusion to obtain an extruded part; and supplementing the temperature of the extruded part and die forging the extruded part to obtain a TiAl alloy valve blank. The application realizes the processing of the TiAl alloy under the condition of no cover, and the valve blank is prepared, and the problem that the TiAl alloy is difficult to form is effectively overcome.

The invention discloses a short-process preparation method of an aluminum-chromium alloy target material. The method comprises the following steps: 1, preparing a powder raw material; 2, uniformly mixing; 3, drying; 4, gradient heating and pressurizing SPS sintering; 5, coating hot rolling and annealing treatment; and 6, machining, straightening, vacuum annealing and cleaning treatment. According to the method, the SPS sintering process of gradient heating and pressurizing is adopted, the aluminum-chromium alloy target material blank which is completely alloyed and uniform and compact in structure is obtained, the preparation period is greatly shortened, the production efficiency is greatly improved, the good alloying effect is effectively guaranteed, the problems of grain growth and oxygen content increase caused by long-time sintering are solved, and the method is suitable for industrial production. By combining the coating hot rolling process and the annealing process, grains are further refined, the structure uniformity is improved, the problem of poor density uniformity caused by SPS uniaxial pressure is solved, meanwhile, expensive hot isostatic pressing equipment is prevented from being used, the production cost is greatly reduced, and the method is suitable for large-scale application and popularization.