962 results about "Partial pressure" patented technology

A hydrogen gas sensor with a substrate and a zinc oxide nanostructured thin film deposited on the substrate, wherein the zinc oxide nanostructured thin film has a lattice structure with a weight ratio of low binding energy O2− ions to medium binding energy oxygen vacancies in a range of 0.1 to 1.0, and a method of fabricating a gas sensor by thermally oxidizing a metal thin film under low oxygen partial pressure. Various combinations of embodiments of the hydrogen gas sensor and the method of fabricating the gas sensor are provided.

The invention relates to the technical field of sewage treatment, in particular to an aerobic aeration treatment system for plateau domestic sewage treatment, which comprises a pretreatment unit, a biological treatment unit, an advanced treatment unit and a recycling unit which are connected in sequence, the system further comprises a data acquisition module, an aerobic aeration intelligent regulation and control module, a biochemical environment constant-temperature maintenance module, a carbon-nitrogen proportion and backflow dynamic regulation and control module, a digital twinning and sludge characteristic simulation module and an energy collaborative scheduling module. Compared with the prior art which adopts a standard aeration strategy and cannot adapt to the special environment of low air pressure and low oxygen partial pressure of the plateau, the system can accurately adapt to the plateau environment by integrating real-time atmospheric pressure and water temperature monitoring, dynamically calculating the oxygen saturation solubility and correcting the aeration control target according to the oxygen saturation solubility, so that the aeration control target is optimized. Stable supply of dissolved oxygen required by biochemical reaction is ensured, and the technical bottleneck of low efficiency of traditional sewage treatment in plateau regions is fundamentally overcome.

The invention provides a vehicle-mounted oxygen production control method and device, a vehicle-mounted oxygen production system and electronic equipment, and relates to the technical field of vehicle control. The method comprises the steps that the oxygen partial pressure in a cockpit, the altitude of the environment where the cockpit is located and the oxyhemoglobin saturation of passengers in the cockpit are obtained; determining an oxygen supply demand value based on the oxygen partial pressure, the altitude and the oxyhemoglobin saturation; and based on the oxygen supply demand value, an oxygen generation module is controlled to start oxygen generation or stop oxygen generation. The starting and stopping of the oxygen generation module are controlled based on the oxygen supply demand value, waste caused by starting of the oxygen generation module when oxygen supply is not needed can be avoided, and therefore the energy consumption of vehicle-mounted oxygen generation can be greatly reduced.

The invention provides a method for selecting a high-concentration VOCs adsorbent at different temperatures and application, and belongs to the technical field of waste gas governing. According to the method, through testing pore structure parameters of a model adsorption material with concentrated pore size distribution, a static adsorption isotherm and a dynamic penetration curve for VOCs at different temperatures, a high-concentration VOCs adsorbent is obtained; a linear relation equation of the critical aperture and the critical pressure is established through linear fitting, then a correlation equation of the critical aperture, the temperature and the partial pressure is established, and the appropriate aperture distribution range and the model selection standard of the high-concentration VOCs adsorbent at different temperatures are determined by combining dynamic adsorption results. According to the method, the ternary matching relation equation of the VOCs partial pressure, the temperature and the critical aperture is constructed, accurate type selection of the high-concentration VOCs adsorbent at different temperatures is achieved, the pore volume utilization rate and the adsorption capacity can be improved, meanwhile, desorption energy consumption and the VOCs pyrolysis risk are reduced, and a theoretical basis is provided for adsorbent type selection and technical optimization.

The invention discloses an electric control type constant oxygen partial pressure closed diving respirator system which comprises an air supply subsystem, a breathing circulation subsystem and an electric control subsystem. The air supply subsystem comprises an oxygen supply system and a diluted gas supply system, the breathing circulation subsystem comprises a breathing circulation pipeline and a carbon dioxide absorbent tank connected in the breathing circulation pipeline in series, and the electric control subsystem comprises an oxygen supplementing electromagnetic valve installed between the oxygen supply system and the breathing circulation pipeline. The gas sensor is used for collecting gas parameters in a breathing circulation pipeline, and the display device, the control panel and the power source are connected with the oxygen supplementing electromagnetic valve and the gas sensor. The oxygen supply can be accurately controlled, the adjustability is high, the response is quick, the stability is good, meanwhile, information can be detected and displayed in real time, and the use safety and comfort are improved.

The invention belongs to the technical field of preparation of hydrogen sulfide stress corrosion resistant oil well pipes, and relates to a 125ksi steel grade hydrogen sulfide stress corrosion resistant oil well pipe material suitable for a normal temperature environment containing 1MPa H2S and a preparation method of the 125ksi steel grade hydrogen sulfide stress corrosion resistant oil well pipe material. B, Ti, V and Nb elements are added, and the contents of Si, Mn and Ni elements, the Cr / Mo ratio and the sum of Nb, V and Ti in steel are controlled; the refined 100% sorbite structure, various compounds and microalloying are obtained through the processes of pure steel smelting, forging, controlled rolling and secondary heat treatment, so that high strength and high toughness in the 125 ksi range are obtained, and meanwhile the hydrogen sulfide corrosion resistance is high. The pipe product obtained by the process method disclosed by the invention has no corrosion cracking phenomenon after being subjected to a corrosion resistance test under the partial pressure of hydrogen sulfide of 1MPa.

The invention belongs to the technical field of oil-gas field development, and particularly relates to a method for testing the content of adsorbed gas in a coal bed gas diffusion process. The problem that the desorption degree of coal bed gas cannot be clearly known at present is solved. According to the technical scheme, high-temperature and high-pressure isothermal adsorption experiments under the condition of different gas proportions are carried out, methane adsorption-desorption capacity of mixed gas of different proportions under different partial pressures is determined, gas diffusion experiments are carried out to evaluate gas migration capacity in the diffusion process and methane gas partial pressure distribution in a sample, and different experiment results are synthesized to determine the methane gas content of the sample. The desorbed gas content in the coal bed gas diffusion process can be calculated; according to the new method, the proportion of the methane desorption gas amount in the coal bed gas development process can be calculated, and the desorption degree of the adsorbed gas of the coal bed reservoir is evaluated.

The invention provides a method, a system and equipment for capturing carbon dioxide in a humid environment. The method comprises the following steps: extracting humid air for adsorption; enabling the adsorbent mixed with the solid amine material and the water absorbing material to be in a fluidized bubbling state, and adsorbing moisture and carbon dioxide in wet air; judging whether adsorption is finished or not according to changes of carbon dioxide concentration and air humidity; the adsorbent completing adsorption is heated and stirred in a vacuum environment, heat transfer is accelerated through water vapor, gas partial pressure is reduced, and desorption of carbon dioxide in the adsorbent is accelerated; and gas in the vacuum desorption device is extracted, and carbon dioxide is collected. The adsorbent formed by mixing the solid amine and the water absorbing material is used for capturing carbon and water, the capturing efficiency can be effectively improved, the stability and adaptability of the system can be enhanced, the carbon dioxide capturing requirement and the dehumidification requirement in the humid environment can be effectively met, meanwhile, the efficient carbon capturing efficiency and the low carbon capturing cost are kept, and the method is suitable for large-scale popularization and application. The method is suitable for large-scale industrial application.

The invention discloses 780MPa-grade hot-dip galvanized DH steel and a manufacturing method thereof, the alloy components of DH780 steel grade are optimized, the contents of Si and Mn elements are reduced, and the generation of external oxides is reduced, so that the risk of plating leakage defects is reduced; besides, by improving the dew point in the annealing process and increasing the oxygen partial pressure in the annealing atmosphere, internal oxidation of Si and Mn elements on the surface layer of the DH780 steel grade is promoted, so that the plating leakage defect is effectively reduced, and the surface quality of the steel plate is remarkably improved; according to the method, the production cost is reduced, the weldability and machinability of a product are improved, the integrity and uniformity of a plating layer are effectively improved, the corrosion resistance of the product is improved, the service life of the product is prolonged, and the application range of the DH780 steel grade hot-dip galvanized steel plate is widened.

The present invention discloses a pyrolysis oil and gas cutting device and method, comprising a waste rubber pellet pyrolysis module, a pyrolysis oil and gas high-efficiency cutting module, a pyrolysis oil and gas condensation module, a Roots blower, a non-condensable gas pressure-stabilizing and conveying module, and a control module. By spraying cooling water and circulating non-condensable gas onto the high-temperature pyrolysis oil and gas, the present invention utilizes the vaporization of the cooling water to absorb a large amount of latent heat of phase change, fully condensing the high-temperature pyrolysis oil and gas. Furthermore, the generated water vapor and non-condensable gas reduce the partial pressure of low-flash-point components in the oil and gas, causing them to continuously migrate from the liquid phase to the gas phase. While ensuring that the oil product flash point meets standards, the minimum flash point cutting temperature required for condensation of high-flash-point oil is lowered, thereby increasing the yield of high-flash-point oil.

Flue gas is compressed to high pressures, which raises the partial pressure of carbon dioxide thus facilitating its absorption into physical solvents (e.g., water, salt solutions, methanol). When added onto an existing CO2-producing process, the compression is performed using multiple stages with intercooling. After the high-pressure carbon dioxide dissolves into the physical solvent, it flows through a series of pressure letdowns using turbines that allow the dissolved carbon dioxide to evolve from the solvent. Through a series of multiple compression stages, the evolved gas is compressed for transport, utilization, or storage. The flue gas that has been scrubbed of carbon dioxide flows through a series of expanders with interheating supplied from waste heat, or the heat of compression. The process is enhanced by employing alkalis that chemically react with acid gases, such as carbon dioxide. These same CO2-capture processes can be integrated into processes that produce shaft and / or electrical power.

The invention provides a cross-adsorption-temperature industrial organic waste gas adsorbent type selection method and application, two or more model adsorption materials with concentrated pore size distribution are used, and filling type adsorption with high pore volume utilization rate can be formed in pores with a specific size or below due to adsorption of volatile organic compounds (VOCs) on a porous material; and a matching relation equation between the filling type adsorption critical aperture and the adsorption partial pressure and a rule of changing along with the adsorption temperature are explored. According to the method, the partial pressure is normalized relative to the saturated vapor pressure at the respective adsorption temperature, and the parameter saturated vapor pressure related to the adsorption temperature is introduced into an equation as a variable, so that an equation of critical pore diameters suitable for adsorption of VOCs at different temperatures and concentrations is established; and a cross-adsorption-temperature industrial organic waste gas adsorbent type selection method is formed. The method provided by the invention can provide a quantitative reference basis for development of VOCs efficient adsorption materials and technologies suitable for different adsorption temperatures.

The utility model discloses a high-vacuum-degree micro-pressure-difference control device for desulfurization slurry grading flash evaporation heat recovery, and belongs to the technical field of coal-fired boiler waste heat heat supply. The system aims at solving the problems that when desulfurization slurry flash evaporation is adopted for boiler flue gas waste heat recovery, much non-condensable gas such as SO2 can escape due to heat release and condensation, the volume of a vacuum system is relatively large, and consequently the high vacuum degree is difficult to maintain by adopting a conventional vacuumizing device, a special micro-differential pressure vacuum pump is added, and the vacuum degree is reduced; extracting non-condensable gas on the liquid level of the condensed water of the last-stage heater, and sending the non-condensable gas to a front-mounted heater matched with the last-stage flash tank; when necessary, alkaline water can be sprayed to the space, where non-condensable gas is enriched, of the final-stage heater so as to comprehensively absorb SO2 and other components to reduce the partial pressure, so that the micro-differential pressure vacuum pump can stably maintain the high-vacuum state of the final-stage heater, the temperature of a concentrated slurry outlet of the final-stage flash tank is greatly reduced, and the concentration rate of the final-stage flash tank is increased. And optimal operation conditions are created for greatly reducing the exhaust gas temperature and greatly improving the waste heat recovery amount.

A method for manufacturing an active material, the method comprising the following steps:(1) mixing an activation agent containing one kind or two or more kinds of alkali metal compounds into an electrode mixture containing an active material and a binder;(2) heating a mixture thus obtained to a temperature higher than or equal to a melting start temperature of the activation agent in an atmosphere having an oxygen partial pressure of 0.3 atm or higher; and(3) collecting an active material from the mixture after heating.

The invention relates to the technical field of waste gas treatment, and discloses a method for calculating contribution coefficients of different pore diameters to VOCs (volatile organic compounds) adsorption capacity under different partial pressures, which comprises the following steps of: using two or more porous materials with concentrated pore diameter distribution as model adsorption materials; the change trend of the VOCs adsorption isotherm in different pressure areas is associated with the pore size of the material to obtain a regularity equation that the critical pore size of filling type adsorption and covering type adsorption changes along with pressure under corresponding adsorption conditions. According to the critical pore channel size equation and in combination with an influence rule of pore size difference and partial pressure change on a VOCs adsorption isotherm, contribution coefficients of different pore sizes in the adsorbent on filling type adsorption and covering type adsorption of VOCs adsorption and a regularity equation of the change along with the partial pressure are obtained respectively. The method can effectively guide the type selection of the adsorbent, and provides a reference basis for the development of efficient adsorption materials and technologies.

The invention relates to the field of tubular column life dynamic prediction, in particular to a tubular column life dynamic prediction method based on corrosion logging detection, which comprises the following steps of: constructing target parameters influencing the corrosion rate of a test tubular column by utilizing a single parameter change test, and calculating the acid gas partial pressure, the liquid holdup and the fluid flow state of each monitoring point; the corrosion rate corresponding to the monitoring point is determined by adopting electromagnetic flaw detection logging, a corrosion rate prediction model is established by adopting a neural network prediction method, and future target prediction parameters are determined by predicting the gas production rate, the water production rate and the formation pressure of each year in the future; therefore, the corrosion rate of each year in the future is determined; calculating the residual wall thickness of the future year, determining an internal pressure resistance safety coefficient and an external extrusion resistance safety coefficient, determining the residual life of the to-be-predicted tubular column, and timely sending out early warning information; and transmitting the early warning information and the collected data to a terminal by using a wireless communication technology to monitor the tubular column in real time. Therefore, the dynamic performance of gas well life prediction is realized.

The invention discloses a high-carbon ferro-chrome smelting control method based on a submerged arc furnace, and relates to the field of high-carbon ferro-chrome smelting control, and the high-carbon ferro-chrome smelting control method comprises the following steps: constructing a three-dimensional temperature measurement network, generating temperature field distribution in the furnace based on three-dimensional space coordinates of all temperature measurement points, and further extracting boundary position coordinates and volume change trend of a molten pool; the method comprises the following steps: performing matching degree calculation on an electrode position impedance gradient curve and a molten pool boundary change trend to diagnose the structural stability of a crucible area, calculating the partial pressure ratio of key components based on hearth pressure, and comprehensively diagnosing the overall health state grade of the furnace condition in the furnace in combination with the structural stability state of the crucible area in the furnace; according to the diagnosed overall health state grade of the furnace condition, the proportion of the chromium ore, the coke and the flux is dynamically adjusted, accurate sensing of the multi-dimensional state in the furnace and grading diagnosis of the furnace condition are achieved, the problems of insufficient reduction of raw materials, waste of the chromium ore and the like can be avoided in time, and the product purity and the smelting stability are guaranteed.

The invention relates to a magnesium-aluminum-zirconium composite refractory material with a gradient structure and a preparation method thereof, and belongs to the technical field of refractory materials. The magnesium-aluminum-zirconium composite refractory material with the gradient structure is prepared from the following raw materials in percentage by mass: 70 to 95 percent of magnesium aluminate spinel and 5 to 28 percent of aluminum-zirconium alloy. The preparation method comprises the following steps: weighing magnesium aluminate spinel and an aluminum-zirconium alloy raw material according to a ratio, adding 2-5% of a phenolic resin binder, fully and uniformly mixing, carrying out compression molding, placing a green body in a tunnel kiln, drying at 150-200 DEG C for 12-24 hours, and carrying out high-temperature sintering at 1350-1750 DEG C in an air atmosphere for 3-8 hours. According to the invention, a gradient functional structure is constructed by utilizing the sensitive characteristic of aluminum-zirconium alloy to oxygen partial pressure at high temperature; a MgAl2O4-Al2O3-ZrO2 composite compact layer is synthesized in situ on the surface of a product with high oxygen partial pressure, so that the erosion resistance of the material can be effectively improved; al2Zr3C4 and MgAlON reinforced phases are synthesized in situ in the interior with low oxygen partial pressure, so that the strength and thermal shock resistance of the material can be effectively improved. The material provided by the invention has excellent erosion resistance, thermal shock resistance and high mechanical strength.

This method for producing a cement hardened body includes: a molding step for molding a molded body from a molding feedstock containing water and a fine powder of cement hydrate; and a carbonation step for carbonating a calcium-containing component contained in the fine powder of cement hydrate in an atmosphere that contains carbon dioxide, has a partial pressure of carbon dioxide of 3.0 MPa or less, and has a temperature of 80°C or less. The molded body for carbon dioxide fixation contains water and a fine powder of cement hydrate, and the particle diameter of the fine powder of the cement hydrate is 500 μm or less. The cement hardened body contains calcium carbonate, has a carbonation degree of 50% or more, and has a compressive strength of 17 N / mm 2 or more.

A process of forming a titania-silica glass body, the process including exposing a titania-doped silica soot body to a constant steam pressure step during which the partial steam pressure is at a first partial pressure of steam P1 that is from about 0 Torr to about 760 Torr and exposing the soot body to a ramp-up steam pressure step during which the partial steam pressure increases from the first partial pressure of steam P1 to a second partial pressure of steam P2, the second partial pressure of steam P2 being from about 50 Torr to about 760 Torr. The second partial pressure of steam P2 being greater than the first partial pressure of steam P1. The process further including heating the soot body during the constant steam pressure step and during the ramp-up steam pressure step and increasing the temperature during at least one of the constant steam pressure step and the ramp-up steam pressure step.

The invention provides a high-concentration volatile organic compound shallow cooling adsorption and desorption method based on filling type adsorption, and belongs to the technical field of waste gas treatment. According to the method, the pore structure parameters of a model adsorption material with concentrated pore size distribution and the static adsorption isotherm and dynamic penetration curve of VOCs at different temperatures are tested; a linear relation equation of critical aperture and critical pressure is established through fitting, a correlation equation of the critical aperture, temperature and partial pressure is constructed, dynamic adsorption capacity is calculated, and the low-temperature strengthening method suitable for dynamic adsorption is determined by combining a shallow cold adsorption and desorption strategy. According to the method, a ternary matching relation equation among VOCs partial pressure, adsorbent aperture and adsorption temperature is constructed, the critical aperture under a specific adsorption condition is calculated, a low-temperature enhanced VOCs shallow cold adsorption and desorption technology is developed, the desorption difficulty is reduced while the pore volume utilization rate and the adsorption capacity are improved, and a support is provided for adsorbent type selection and adsorption technology optimization.

The system comprises an absorption tower, a grading flash tank, a desorption tower, a buffer tank and an MVR (mechanical vapor recompression) compressor, a liquid outlet of the absorption tower is connected with the grading flash tank, a gas outlet of a first-stage flash cavity of the grading flash tank is connected with a carbon dioxide recovery unit, gas outlets of other flash cavities are connected with a gas inlet of the absorption tower, and a gas inlet of the absorption tower is connected with a gas outlet of the desorption tower. A liquid outlet of the grading flash tank is connected with a desorption tower, and a regenerated gas outlet of the desorption tower is connected with a buffer tank through an MVR compressor, so that regenerated gas is pressurized and then conveyed into the buffer tank; a gas outlet of the buffer tank is connected with the carbon dioxide recovery unit, and a steam outlet of the buffer tank is respectively connected with the grading flash tank and a reboiler of the desorption tower. The regeneration energy consumption can be reduced, and the equipment size can be reduced.

The present invention discloses a closed-loop EGR flow control system and control method for a natural gas engine. The control system includes: a controller for determining an EGR demand flow rate based on actual engine operating conditions; a controller for obtaining the pressure of an air and gas mixture detected by an intake pressure sensor; or, alternatively, for determining the pressure of an air and gas mixture based on the EGR demand flow rate, a threshold flow rate, the maximum opening of an EGR valve, the actual opening of the EGR valve, the gas flow rate, and the fresh air flow rate; a controller for determining an actual EGR flow rate based on the obtained pressure of the air and gas mixture, the partial pressure of gases in the cylinder, the pressure-to-flow conversion slope, the gas flow rate, and the fresh air flow rate; a controller for determining an EGR flow rate correction value based on the obtained actual EGR flow rate and the EGR demand flow rate; and a controller for adjusting the EGR valve opening based on the EGR flow rate correction value so that the actual EGR flow rate matches the EGR demand flow rate, thereby achieving closed-loop control of the EGR flow rate. The present invention can achieve precise control of the EGR flow rate in two ways.

A hydrogen gas sensor with a substrate and a zinc oxide nanostructured thin film deposited on the substrate, wherein the zinc oxide nanostructured thin film has a lattice structure with a weight ratio of low binding energy O2− ions to medium binding energy oxygen vacancies in a range of 0.1 to 1.0, and a method of fabricating a gas sensor by thermally oxidizing a metal thin film under low oxygen partial pressure. Various combinations of embodiments of the hydrogen gas sensor and the method of fabricating the gas sensor are provided.

A microfabricated gas sensor for a target gas. The microfabricated gas sensor comprises: an electrolyte, a first electrode and a second electrode. The electrolyte is at least partly provided using photolithography. The first electrode is in contact with a first surface of the electrolyte and is for reducing or oxidising the target gas received through the electrolyte to produce target ions. The second electrode is in contact with a second surface of the electrolyte. With a potential difference applied between the first and second electrodes an amount of electrical current from the first electrode to the second electrode is indicative of at least one of: a concentration of the target gas at the first surface, or a partial pressure of the target gas at the first surface.

A substrate processing tool includes: a first processing module; a vacuum transfer module connected to the first processing module; one or more pumps; a backfill source; and one or more controllers. The one or more controllers are configured to: control the one or more pumps to reduce a chamber pressure in the vacuum transfer module from a first chamber pressure to a second chamber pressure and then backfill the vacuum transfer module with an inert gas to a third chamber pressure prior to permitting transfer of a substrate into the first processing module; subsequent to backfilling the vacuum transfer module, cause a transfer of the substrate from the vacuum transfer module to the first processing module; and cause the first processing module to process the substrate.

The utility model discloses a gas-solid transmission reactor capable of being used for various in-situ spectrum characterization in a high-pressure environment, which comprises a reaction tank main body, and the rear end of the reaction tank main body is fixedly connected with a light window with a cooling channel; the rear end of the light window is fixedly connected with the front end of the reaction tank main body through fixing bolts, and the fixing bolts are positioned at four corners of the light window and the reaction tank main body. Through the design of the thickness and the diameter of the rubber gasket and the light window sheet and the use of the polytetrafluoroethylene compression ring on the outer side, higher pressure in the reaction tank can be ensured, the application range of the reactor is expanded, and the reactor can be used for in-situ research on the influence of partial pressure of the reactor on related catalysts and spectral characteristics; a gas inlet and a gas outlet on the reaction tank main body are controlled by a three-way valve and are externally connected with a gas control system capable of controlling flow, so that the pressure can be stably controlled, and the reaction control under dynamic or static conditions is realized.

The present invention relates to a system and method for capturing CO2 in a carbon emission source using chemical chain hydrogen production technology, using the heat released in the fuel chemical chain hydrogen production process to provide energy for a CO2 release unit in the CO2 capture process of a carbon emission source, and using water vapor generated by a reduction reaction to reduce the carbon dioxide partial pressure in the CO2 release unit, which is beneficial for the CO2 release unit to precipitate CO2. This method can achieve efficient conversion of fuel chemical energy while reducing the energy consumption of CO2 capture in a carbon emission source, and can reduce equipment investment costs compared to separately performing fuel chemical chain hydrogen production and capturing CO2 in flue gas.

The invention relates to a vehicle-mounted screw air compressor oil emulsification prevention method and system, a medium and a program product, and in the method, the running state parameters of a screw air compressor are monitored in real time, and a water vapor saturation pressure formula and a temperature and pressure coupling mathematical model are used for calculating saturation water vapor pressure and actual water vapor partial pressure respectively. When the actual water vapor partial pressure is larger than the saturated water vapor pressure force corrected by the safety coefficient, the system adjusts the oil way temperature control valve to reduce the lubricating oil flow of the oil cooler so as to increase the exhaust temperature. If the condensation risk still exists and the exhaust temperature does not reach the shutdown protection threshold value, the oil way temperature control valve continues to be adjusted; if the exhaust temperature reaches the shutdown protection threshold value, the actual water vapor partial pressure is reduced by reducing the rotating speed of the frequency converter. And after the condensation risk is eliminated, the current operation parameters are maintained. The method is used for reducing the possibility that water vapor reaches saturation in the compression system and liquid water is separated out, and the accuracy and stability of lubricating oil emulsification risk control of the air compressor under the variable load working condition are improved.

The invention discloses a method for improving stability of steel slag by regulating and controlling treatment atmosphere, which comprises the following steps: S1, crushing the steel slag until the particle size is less than or equal to 10mm, and wetting until the water content is 5-20%, S2, putting the steel slag treated in the step S1 into a closed container, injecting CO2 gas into the closed container until the CO2 gas reaches a preset partial pressure value, s3, injecting saturated water vapor into the closed container until the total pressure reaches a preset total pressure value, and forming wet and hot acidic wet and hot mixed gas by using the water vapor and CO2, and S4, after the total pressure of the closed container reaches the preset total pressure value, keeping for 2-12 hours under a constant pressure condition, and carrying out hydration and carbonization reaction on free calcium oxide and free magnesium oxide in the steel slag and the mixed gas to generate calcium carbonate and magnesium carbonate. According to the method, the dual effects of improving the stability of the steel slag and effectively fixing carbon can be achieved, comprehensive utilization of the steel slag in civil engineering is achieved, meanwhile, CO2 tail gas captured by a steel mill is utilized, carbon is effectively fixed, and carbon emission is reduced.