59 results about "Argon" patented technology

The invention discloses an intelligent monitoring method for an argon recovery system, particularly relates to the technical field of gas purification adsorbent state monitoring, and is used for solving the problem of adsorbent recessive failure early warning lag caused by dependence on tail gas average concentration monitoring of an existing argon recovery system. The method comprises the following steps: collecting regeneration tail gas concentration time sequence data in real time, and extracting a slope change rate of a desorption rate rising section and an area integral value of a desorption peak attenuation section; constructing an area integral value sequence and calculating a symmetric deviation degree; identifying a pressure pulse disturbance time period to obtain effective time period data; calculating the fluctuation abnormality of the slope change rate offset and the symmetry deviation degree based on the effective data; when the two regeneration periods simultaneously exceed the threshold value and three continuous regeneration periods meet the condition, an adsorbent replacement early warning signal is generated, and early-stage accurate early warning of adsorbent performance degradation is achieved.

The invention belongs to the technical field of TG-DSC testing of metal powder materials, and particularly relates to an anti-oxidation high-precision TG-DSC testing method of high-temperature alloy powder, which comprises the following steps: placing the high-temperature alloy powder in a furnace body of a TG-DSC instrument, carrying out high-purity argon replacement on the atmosphere in the furnace body by taking high-purity argon as furnace body purging gas, and carrying out high-purity argon replacement on the atmosphere in the furnace body; the initial oxygen content in the furnace body is reduced to 0.1 ppm or below; continuously introducing hydrogen-argon mixed gas as flowing gas into the furnace body, controlling the temperature of the furnace body to be increased to a target temperature, and ending the test to obtain a TG curve and a DSC curve of the to-be-tested high-temperature alloy powder; according to the invention, through physical cleaning of oxygen in the furnace body by circulating vacuumizing before testing and chemical cleaning of oxygen permeating into the furnace body by hydrogen-argon mixed gas in the whole process in the testing process, a dual anti-oxidation barrier is constructed, so that oxidation weight increment and oxidation heat release interference of a powder sample are eliminated fundamentally; therefore, the real mass change and the heat flow signal change of the alloy powder sample in the temperature programming process can be accurately measured.

The invention discloses an argon recovery system for EIGA powder preparation, belongs to the technical field of gas recovery, and solves the problems that the step is added for further purification after argon recovery every time, so that excessive energy is consumed, the cost of recovered argon is forcibly increased, and the production cost is reduced. Therefore, whether low-concentration impurities such as CO and H2 are mixed in argon or not needs to be detected in the argon recovery process. Comprising a pretreatment module, a filtration and purification module, a deep purification module, a pressurized gas storage module and a low-concentration impurity detection module. According to the device, argon is sampled in a split-flow mode, impurity gathering is enhanced through a sound field, detection, signal processing and the like are carried out, errors are corrected through temperature and pressure compensation, alarm is triggered, emergency purification is controlled, real-time detection and closed-loop control of the CO / H2 in the argon as low as 0.5 ppm / 0.3 ppm are achieved, routes can be switched through an execution module, the argon is treated through a chemical looping combustion reactor, impurities are removed, and the device is suitable for industrial production. And purity of argon is ensured.

The invention belongs to the field of part manufacturing, and particularly relates to a molten metal purification method for sand mold casting, which comprises the following steps: S1, arranging a steel barrel piece between a pouring ladle and a casting mold for soft sealing, mounting a pressure-bearing pipeline on the steel barrel piece, and forming an angle of 45 degrees between an outlet of the pipeline and a vertical axis; s2, argon is introduced into the pressure-bearing pipeline 5 seconds before pouring, the pressure of the argon is 0.1-0.3 MPa, and argon introduction is stopped immediately when pouring is stopped; and S3, in the cooling process of the molten metal in the casting mold cavity, argon bubbles float upwards to bring inclusions to a top slag collecting groove, and a slag collecting groove is removed during sand cleaning and cutting. According to the steel barrel piece, contact between the atmosphere and molten metal is isolated, and oxide inclusion is effectively prevented; and meanwhile, argon is blown in in the pouring process to form bubbles and enter a casting mold cavity, and casting defects can be effectively reduced according to the principle that the bubbles float upwards to take away inclusions.

This invention provides a plasma treatment method capable of forming a deposited film on the walls of a processing chamber and suppressing the diffusion of contaminants into a transport system. The plasma treatment method for plasma treating samples placed on a sample stage within a processing chamber includes: a first step of removing deposits in the processing chamber using plasma; a second step of depositing deposits in the processing chamber using a mixture of hydrofluorocarbon gas and argon (Ar) gas after the first step; a third step of selectively removing deposits from the sample stage using a mixture of oxygen (O2) gas and argon (Ar) gas after the second step; and a fourth step of plasma treating a predetermined number of samples after the third step.

The invention discloses a molten lead anti-oxidation method based on inert gas dynamic protection. The molten lead anti-oxidation method comprises the following steps that firstly, gas pre-filling is conducted, wherein nitrogen is introduced into a lead melting furnace to replace air; secondly, feeding and lead melting are conducted; step 3, dynamic gas protection; fourthly, pouring forming is conducted; a relatively low-oxygen environment is created for subsequent lead melting operation by pre-filling nitrogen into a lead melting furnace, then nitrogen and argon are added in the initial stage of lead melting to ensure that molten lead is always covered by protective gas, and nitrogen, argon and hydrogen are added in the stable stage of lead melting, so that the stability of a gas protective layer can be maintained, and the service life of the lead melting furnace is prolonged. According to the high-temperature lead smelting method, the high-temperature lead smelting process can be guaranteed, it can be guaranteed that the reducing environment created by hydrogen continuously plays a role, oxidation of lead is further inhibited, the oxidation loss of lead in the high-temperature lead smelting process is remarkably reduced to 0.5% or below, waste of lead resources is reduced, the production cost is reduced, meanwhile, it is guaranteed that lead components are stable in the lead smelting process, and the consistency and stability of product quality are improved.

This invention discloses a method for producing high-purity oxygen based on LNG cold energy, belonging to the technical field of gas purification equipment. The implementation steps include: S1, pre-cooling and stepped heat exchange of raw air; S2, distillation separation process using LNG cold energy; S3, oxygen purification and argon separation; S4, cold energy recycling. This invention can improve the purity of oxygen, making the molar purity of oxygen above 99.9%, and rationally utilize LNG cold energy to liquefy raw air, reducing air separation costs. In addition, by coupling a crude argon tower, argon with a molar fraction of 7.4% can be produced for the utilization of rare gases.

The utility model discloses a bowl mouth argon blowing type external submersed nozzle, which relates to the field of nozzles and comprises a nozzle body, an iron ring is mounted on the outer wall of the nozzle body, an argon pipe is mounted on the side edge of the iron ring, and clamping blocks are symmetrically and movably connected to two sides of an inner cavity of the iron ring. Reinforcing blocks are symmetrically and movably connected to the top and the bottom of an inner cavity of the iron ring, and anti-abrasion pads are symmetrically installed on the opposite sides of the two reinforcing blocks. According to the bowl opening argon blowing type externally-installed submersed nozzle, argon can be blown into the through groove through the argon groove through the arranged argon pipe, so that the inner cavity of the nozzle body can be filled with argon, sealing treatment can be directly conducted through argon without other structures during pouring, and the sealing effect is good. The sealing structure cannot be damaged during pouring, the pouring cost can be effectively reduced, and the pouring quality and efficiency can be further improved.

The invention discloses a process for recovering rare earth oxide from rare earth oxide waste residue, and relates to the technical field of rare earth oxide recovery, and the process specifically comprises the following recovery steps: step 1, smelting: under the protection of argon atmosphere, melting neodymium iron boron alloy in a graphite crucible by adopting a vacuum induction melting furnace to obtain alloy mother liquor, and then carrying out heat preservation for 20-30 minutes; according to the technology for recycling the rare earth oxide from the rare earth oxide waste residues, rare earth oxidation loss is avoided through argon protection smelting, fluoride or borate is added into a graphite crucible, the smelting temperature is reduced by means of the low-melting-point characteristic of fluoride or borate, and meanwhile the adhesion loss of the rare earth oxide on the crucible wall is reduced by forming a rare earth-fluorine / boron composite melt; b-H bond breakage is accelerated through a platinum catalyst, borane by-products are recycled synchronously, rare earth colloid wrapping is avoided through EDTA disodium modified precipitation, and the COD value of wastewater is reduced; through the synergistic effect of gradient magnetic separation and pH regulation, the iron removal rate is larger than 99.9%, and the purity of the rare earth hydroxide reaches 99.8% or above.

An electrode assembly with an electrosurgery blade having argon beam capabilities. The electrode assembly includes an electrosurgery blade, which may be monopolar, bipolar, or bipolar with monopolar capability, and a non-conductive housing for providing an ionized argon gas.

The invention relates to a high-temperature coal gas carbon migration online quantitative monitoring method and system based on an argon internal standard, and belongs to the technical field of blast furnace ironmaking. The system is characterized in that a high-precision gas distribution execution unit comprises multi-channel mass flow controllers connected in parallel and is used for accurately simulating the composition of industrial gas and maintaining the internal standard concentration of argon; the high-temperature-resistant reaction unit is designed based on an industrial hot-blast stove structure, comprises a reactor and a heating system, and accurately reproduces an industrial heating environment; the rapid phase change quenching unit comprises a micro-channel heat exchanger and a low-temperature phase change system and is used for realizing super-rapid cooling; the intelligent analysis processing unit comprises a gas analyzer, an argon standard flow calibration engine and a bidirectional carbon migration model library; the argon standard flow calibration engine is used for obtaining the actual outlet gas flow through back calculation according to the element conservation principle based on the argon concentration detected by the gas analyzer in the outlet gas; and the bidirectional carbon migration model library is used for storing thermodynamic parameters of the carbon precipitation reaction or the carbon elimination reaction and calculating the carbon precipitation amount and the carbon elimination amount.

The invention belongs to the technical field of inert gas purification and recovery, and relates to a device for removing carbon, oxygen and hydrogen impurities from argon tail gas and a treatment method thereof, the device comprises a first reactor, a second reactor and a third reactor which are communicated in sequence; an inlet of the first reactor is connected with an argon tail gas conveying pipe and a hydrogen conveying pipe; a first regulating valve is arranged on the hydrogen conveying pipe; the first analyzer is connected to an outlet of the first reactor; the second analyzer is connected to an outlet of the second reactor; the temperature measuring unit is connected to an inlet of the second reactor; the control unit controls the opening degree of the first adjusting valve and the second adjusting valve. The device and the method have the advantages that the device and the method are used for removing carbon, oxygen and hydrogen impurities in argon tail gas, and can solve the problems of high potential safety hazard, high management difficulty, low recovery rate, investment increase and energy consumption increase caused by an excessive hydrogenation and oxygen removal process in the conventional argon recovery device and method; the process is effectively simplified, the equipment investment is reduced, the energy consumption is reduced, and the potential safety hazard is eliminated.

[Problem] To provide an ionization device and an ionization method which are capable of stably sustaining dark discharge at a low voltage and enable stable ionization of various samples from gas to solid. [Solution] The present invention pertains to an ionization device which: ionizes a sample by applying a voltage to a mixture gas of argon gas and nitrogen gas under an air atmosphere and exciting the argon with dark discharge; and comprises a mixture gas generation unit, a sample supply unit, and an ionization means. In the mixture gas generation unit, the mixture gas is generated by mixing the argon and the nitrogen. In the sample supply unit, a sample component is generated by bringing the mixture gas into contact with the sample. In the ionization means, sample ions are generated by exciting the sample component with the dark discharge. The present invention further pertains to: an ion introduction device and an ion introduction method for introducing said sample ions into a mass spectrometer; and a mass spectrometry system for analyzing the mass of the sample by ionizing and introducing the sample into the mass spectrometer.

This application relates to a uniformly blowing argon nozzle, belonging to the field of steelmaking technology. It includes a main body with a central drain hole and an annular groove on its outer wall. Multiple blowing holes are circumferentially arranged within the main body, with their ends located within the drain hole and the annular groove, respectively. An annular filter screen and an outer ring are arranged within the annular groove, with the outer ring sealing the opening of the groove. A blowing nozzle is fixed to the outer ring. A baffle is fixed to the filter screen opposite the blowing nozzle. A gap is maintained between the filter screen and the end of the blowing hole, and also between the filter screen and the outer ring. In this application, argon gas is compressed and passes through the filter screen and filter screen sequentially, allowing for relatively uniform argon gas flow through both screens, thereby improving the uniformity of the airflow entering each blowing hole and preventing deflection of the molten steel flow. The main body is composed of an upper and lower half, facilitating the manufacture of the annular groove and the installation of objects within it.

A method for producing a chromium nitride (CrN) thin film is provided. The method includes reactive radio frequency magnetron sputtering chromium onto a substrate in the presence of a gaseous mixture including nitrogen and argon to form the CrN thin film, where a ratio of the nitrogen gas to the argon gas is 1:2 to 1:10, and where the CrN thin film has an average thickness of 500 to 1500 nm. The CrN film as prepared by the method of the present disclosure can be used in sensors for cryogenic temperature.

This invention discloses a gas purification device for neutron-activated argon isotope dating based on a D-D accelerator, belonging to the field of rare gas isotope mass spectrometry analysis and geological dating technology. Addressing the limitations of traditional gas purification systems, which suffer from large internal volumes and high static release rates, making them unsuitable for the efficient purification and enrichment of trace argon isotopes generated by the D-D accelerator neutron activation method, this invention employs an integrated 316L stainless steel substrate, internally integrating a main gas flow channel and multiple branch channels. The substrate houses a sample gas injection module, a primary purification module, a secondary purification module, a tertiary purification module, a vacuum preparation and monitoring module, a standard gas injection module, and a gas enrichment module. Each module is connected to the main gas flow channel via branch channels, achieving multi-stage purification of the mixed gas and low-temperature enrichment of trace argon isotopes. This device is used for gas purification in D-D accelerator neutron-activated argon isotope dating, meeting the requirements for efficient purification and enrichment of extremely small amounts of argon gas.

A process for purifying a crude hydrogen feed stream employs an adsorbent having a N2 / Ar selectivity at 30 DEG C in the range of 2 to 4 and a Henry law constant of argon at 30 DEG C in the range of 0.15 to 1.0 mmole / g / atm. The composition of a crude hydrogen stream from a carbon dioxide capture process requires formulation of new adsorbent selection criteria to improve recovery.

The invention belongs to the technical field of detection of the content of gas elements in high-temperature alloy powder, and particularly relates to a method for measuring the content of argon in high-temperature alloy powder. A pulse heating-thermal conductivity method is used for detection, a sample is fed in a direct feeding mode, and the method mainly comprises the steps of parameter setting, blank deduction, working curve establishment and sample detection. According to the method, by optimizing a detection program and a sample introduction mode, the interference of gas adsorbed on the surface of the powder and internal compound nitrogen is effectively eliminated, and the argon content is accurately and reliably measured.

The invention relates to the technical field of argon graded replacement, in particular to an argon graded replacement method for synthesizing n-butyllithium. Comprising the following steps: arranging a gas accommodating cavity between adjacent reaction kettles, and controllably communicating the gas accommodating cavity with a gas outlet of a front-stage reaction kettle and a gas inlet pipeline of a rear-stage reaction kettle through a control valve group; firstly, pretreatment equipment (a branch pipe) of a single kettle is started, argon is introduced, mixed gas in a pipeline blind area is removed, then the argon time sequence and flow of upstream, downstream and midstream gas inlets are controlled, a stable pressure gradient is formed, and the mixed gas in the kettle is directionally pushed to a gas containing cavity; mixed gas in the front-stage gas accommodating cavity is introduced into the rear-stage kettle for repeated replacement and is finally discharged from the tail end; according to the method, blind area purification is enhanced, the replacement efficiency is improved, argon consumption is reduced, inert gas waste is reduced, carbon emission reduction is assisted, and atmospheric pollution prevention and control are assisted.

The present invention generally relates to methods for determining an improved carbon endpoint concentration in an argon oxygen decarburization process. The present invention utilizes various pieces of real-time data, including parameters of the flame and soot content to estimate a carbon composition in the steel product, along with two other metallurgical models to generate corresponding carbon compositions in the steel product. A total of 3 carbon compositions are determined and continuously updated during the process. An improved carbon endpoint value is determined to be reached when at least a first value and a second value corresponding to any of the three carbon compositions are below a target carbon value. Upon such condition being satisfied, an alert notification is transmitted to enable carbon sampling to confirm that the sample has a measured carbon concentration that is below a predetermined calculated target carbon value.

This invention relates to a method for manufacturing an SOI structure, comprising the following steps: a) providing an initial substrate made of monocrystalline silicon having an interstitial oxygen content between 15 and 27 ppma according to standard ASTM'79, and a resistivity of less than 200 ohm·cm, the initial substrate being designed to form a carrier substrate for an SOI structure after undergoing a subsequent step b); b) applying a series of heat treatments to the initial substrate, wherein the initial substrate has no silicon oxide layer on at least its front side except optionally a native oxide layer, the series consisting of: - a first heat treatment defined by a isothermal range of temperatures above 1200°C and below 1280°C for a duration between 1 second and 60 seconds, a cooling ramp between 10°C / s and 70°C / s, and an argon or argon-hydrogen atmosphere, followed by - a second heat treatment in a neutral or oxidizing atmosphere defined by a isothermal range of temperatures between 900°C and 1100°C, without intermediate steps prior to this temperature, to form a carrier substrate comprising: - a stripped surface layer with a thickness greater than 40 µm and a resistivity of less than 10 ohm·cm. 8 / cm 3 The microdefect concentration (BMD); and - enriched deep layers, located below the peeled surface layer, with a concentration of 2.10. 8 / cm 3 Up to 5.10 10 / cm 3 The invention relates to the microdefect concentration (BMD) between these parameters. The invention also relates to a carrier substrate and an SOI structure including the carrier substrate.

A system and method of optimizing the production of argon in a cryogenic air separation unit using a temperature profile of a distillation column or distillation column section obtained via fiber optic temperature measurements on the exterior surface of the distillation column or the distillation column section is provided. The temperature profiles are used to determine the vertical location and / or spatial movement of the maximum argon concentration in the distillation column or the distillation column section. Distillation column operation is then adjusted such that the vertical location or spatial movement of the maximum argon concentration is aligned proximate with the location of an argon-rich draw from the distillation column.

The utility model provides a kind of argon analysis system, the purpose is to solve the technical problem that argon is diluted after being used as protective gas in prior art, and traditional processing mode is difficult to make recycled gas to reach use standard again.The argon analysis system includes: main pipeline, with the analyzer cabinet body connection in argon factory area;Multiple trace oxygen analyzers, are located on the main pipeline, and are distributed along the laying path of the main pipeline;Recycling pipeline, in communication with the main pipeline;Wherein, CO analyzer, CO2 analyzer, argon nitrogen analyzer, zirconia analyzer, hydrogen analyzer are also provided on the main pipeline.Argon analysis system sets trace oxygen analyzer, CO analyzer, CO2 analyzer, argon nitrogen analyzer, zirconia analyzer and hydrogen analyzer and other instruments on the main pipeline conveying argon, analyzes the composition in argon, then makes sufficient preparation for subsequent processing, so that recycled argon can be utilized again.

The utility model relates to the technical field of gas analysis equipment, and discloses an argon content standard monitoring device. The argon content up-to-standard monitoring device comprises an argon pipe, supporting rings are fixedly installed on the two sides of the interior of the argon pipe, a bottom ring is fixedly installed at the bottom of the interior of each supporting ring, a supporting ring is fixedly installed at the bottom of the interior of each bottom ring, and a silica gel ring is movably connected to the top of each supporting ring; a baffle ring is movably connected to the top of the silica gel ring, a filtering barrel is fixedly mounted in the baffle ring, and a fixing block is movably connected to the interior of the supporting ring. The silica gel ring can be supported through the supporting ring, a gap between the baffle ring and the supporting ring can be sealed through the silica gel ring, so that the leakage problem is avoided, impurities in argon can be filtered through the filtering barrel at the bottom of the baffle ring, and the situation that the monitoring effect is affected due to the fact that the impurities are adsorbed to the surface of the monitoring head is avoided; and the practicability of the argon content standard monitoring device is improved.

The present invention provides a method for producing high-purity argon from air using a three-stage process. Using air as the raw material, a first-stage pressure swing adsorption unit, a second-stage pressure swing adsorption unit, and a third-stage catalytic deoxygenation unit are operated in series. The first-stage pressure swing adsorption unit includes a first-stage adsorption tower for removing oxygen, carbon dioxide, and water to produce an intermediate gas rich in nitrogen and argon. The second-stage pressure swing adsorption unit includes a second-stage adsorption tower for further removing nitrogen to produce an argon-rich gas that also contains trace amounts of oxygen. The third-stage catalytic deoxygenation unit includes an oxygen removal system and a carbon dioxide removal system. The oxygen removal system uses carbon combustion to remove trace oxygen from the argon-rich gas to produce carbon dioxide. The carbon dioxide removal system further removes carbon dioxide to produce high-purity argon. The present invention utilizes a non-cryogenic process, enabling the production of argon at any time, making argon acquisition more convenient and efficient.

A process for forming particles. The process includes a step of entraining gas into a precursor material, wherein the gas includes from about 50 vol % to about 100 vol % argon and from about 0 vol % to about 50 vol % other constituents. The precursor material is deposited onto a moving conveyor. The precursor material is cooled to form a plurality of particles.

The invention discloses a method for preparing a two-dimensional low-symmetry multi-element material [Bi2CuO3] SO4, which comprises the following steps: selecting Bi2O3, Bi2S3 and Cu2S solid powder as precursors, and reacting in a mixed atmosphere of argon and air; putting Bi2S3 into a porcelain boat, putting the porcelain boat in a low-temperature area, putting the other two precursors into the porcelain boat, putting the porcelain boat in a high-temperature area, taking freshly stripped mica as a growth substrate, and putting the growth substrate on the powder in the high-temperature area; the material is prepared by adopting three stages, namely a heating stage, a growth stage and a cooling stage. According to the method, the precursor which is spontaneously carried out according to thermodynamics is selected as a reactant, the problem that the uniformity of components is difficult to control is solved, meanwhile, the preparation process is divided into three stages, the transportation process is accurately controlled by regulating and controlling the gas flow of different stages, and the product quality is improved. And the problems of imperfect precursor design and conveying mechanism and insufficient surface quality and phase purity control are solved.

The invention provides an atomic layer deposition process and structure for forming an air gap, and the process comprises the steps: introducing mixed gas of hydrogen and argon, applying radio frequency power to generate hydrogen plasma, and carrying out the in-situ plasma pretreatment of the side wall and the bottom of a groove; using the precursor to set a first pulse time for non-conformal deposition by using an ALD process; the first pulse time of the precursor and the oxidizing agent is prolonged to the second pulse time, so that saturated adsorption is realized; and carrying out thermal annealing treatment in an oxygen atmosphere, and taking out after natural cooling. According to the method, the single and continuous dual-mode atomic layer deposition process is adopted, the air gap is directly constructed and sealed in situ in the preformed groove structure, and a plurality of independent processes such as photoetching, etching removal and cleaning which are necessary for a traditional sacrificial layer method are abandoned, so that the whole process flow is greatly simplified, and the production and manufacturing cost is remarkably reduced.

The invention discloses a Cu1.8 S / C composite material as well as a preparation method and application thereof, and belongs to the technical field of electrolytic hydrogen production. According to the technical scheme, the method comprises the steps that a Cu block serves as an anode target material and is placed on a water-cooling copper table in an electric arc reaction chamber, a graphite rod serves as a cathode, vacuumizing is conducted before arc ignition, then argon and methane are sequentially introduced into the reaction chamber, residual gas is pumped out after arc ignition and arc stopping, and nano-particles in a furnace are passivated in the argon atmosphere; collecting black powder on the top and the side wall of the reaction chamber, wherein the powder is Cu / C nanoparticles; and carrying out heat treatment on the Cu / C nano particles and the S powder at 550 DEG C under the protection of argon to obtain the Cu1.8 S / C nano composite material. The preparation method is applied to the aspect of electrolytic hydrogen production, solves the problem of low carrier migration rate of copper sulfide compounds, and has the characteristics of high carrier migration efficiency, good durability and high catalytic efficiency.

A method for producing a chromium nitride (CrN) thin film is provided. The method includes reactive radio frequency magnetron sputtering chromium onto a substrate in the presence of a gaseous mixture including nitrogen and argon to form the CrN thin film, where a ratio of the nitrogen gas to the argon gas is 1:2 to 1:10, and where the CrN thin film has an average thickness of 500 to 1500 nm. The CrN film as prepared by the method of the present disclosure can be used in sensors for cryogenic temperature.