142 results about "Residual oxygen" patented technology

The invention discloses an automatic combustion control method and system for a slag pulverizer hot blast stove. The method comprises the following steps: acquiring operation parameters of a hot-blast stove and a slag pulverizer; selecting one of a furnace temperature control mode and a flow control mode for execution according to the production stage; the total target gas flow is calculated in the selected mode, wherein the flow control mode is subjected to prospective adjustment according to a linkage rule base of mill operation parameters; the air-fuel ratio is corrected based on double feedback of coal gas components and flue gas residual oxygen; and finally, distributing the target flow to a plurality of burners and executing combustion. Through dual-mode switching and intelligent linkage with the mill, conversion from reaction type control to predictive type control is achieved, thermal lag is effectively overcome, combustion efficiency is ensured through dynamic air-fuel ratio correction, and the energy utilization rate, operation stability and automation level of the system are remarkably improved.

The invention belongs to the technical field of integrated die-casting forming, and relates to a semi-solid double-alloy integrated die-casting forming method and system.The method comprises the steps that two kinds of semi-solid alloy slurry are prepared, specifically, at least two kinds of metal are mixed and then heated to be melted; after inert gas is filled to clean residual oxygen in the resistance furnace, refining and degassing are carried out, so that the molten alloy liquid is synchronously subjected to eccentric rotation and indirect ultrasonic treatment for the same time in the inert gas closed environment to generate vortexes and grow solid-phase particles, and meanwhile, the high-pressure inert gas closed environment is vacuumized; corresponding semi-solid alloy slurry is obtained; cooling the two kinds of semi-solid alloy slurry, and then respectively transferring the two kinds of semi-solid alloy slurry into corresponding injection chambers in an inert atmosphere; and the two kinds of semi-solid alloy slurry are sequentially or simultaneously injected into the corresponding areas in the die-casting die, the two kinds of semi-solid alloy slurry are converged, and a metallurgical-mechanical composite bonding interface is formed at the joint of the two kinds of semi-solid alloy slurry. According to the invention, the effects of uniform material structure and high injection efficiency of the integrated injection casting can be realized.

The invention provides a recirculation flue gas denitration load reduction evaluation method, which comprises the following steps: acquiring flue gas temperature, residual oxygen concentration and recirculation flow transmitted by a multi-point temperature collector and an oxygen content monitoring device, and performing data fusion processing to obtain temperature gradients and oxygen concentration gradients corresponding to different extraction positions; a preset target oxygen concentration threshold value of the denitration system is obtained, the deviation degree of the local oxidizing atmosphere strengthening degree grade and the target oxygen concentration threshold value is evaluated, the oxygen content proportion of the hearth is adjusted according to the deviation degree, and a wind pressure set value is obtained; and the recirculation flow and the residual oxygen concentration variation corresponding to the optimal extraction scheme are extracted, the oxygen concentration reduction amplitude is evaluated, the denitration load reduction proportion is quantified according to the oxygen concentration reduction amplitude, and denitration load reduction is evaluated.

The invention discloses a rolling manufacturing method of low-decarburization medium-chromium round steel for a caterpillar track link and a product of the rolling manufacturing method, and belongs to the technical field of alloy steel rolling. The method comprises the following steps: smelting molten steel, wherein the molten steel comprises the following components in percentage by mass: 0.28-0.34% of C, 0.15-0.35% of Si, 0.50-0.85% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 0.80-1.10% of Cr, less than or equal to 0.30% of Ni, 0.10-0.30% of Mo, less than or equal to 0.30% of Cu, 0.010-0.060% of Al and the balance of Fe and impurities; lF refining, RH vacuum degassing (the time is longer than or equal to 20 min, and the hydrogen content is smaller than or equal to 1.5 ppm), electromagnetic stirring continuous casting (the superheat degree is 15-25 DEG C), slow cooling (longer than or equal to 12 h), segmented heating (the total time is shorter than or equal to 200 min, and the residual oxygen content is lt, 3%), multi-stage high-pressure water descaling (the pressure before finish rolling is 30-35 MPa) and hot continuous rolling (the compression ratio is larger than or equal to 6) are conducted. The total decarburized layer depth of the obtained round steel is smaller than or equal to 0.30 mm, and the round steel has high hardenability, excellent mechanical property and low surface defect rate and is suitable for heavy-load components such as a hydraulic excavator caterpillar track link.

The invention relates to the technical field of heat treatment, and discloses an optimized heat treatment device for a high-temperature vacuum tube type muffle furnace, which comprises a muffle furnace main body with an air inlet pipe and a cabin door, a clamp conveying mechanism and a sample clamp are arranged in an inner cavity of the muffle furnace main body, and by utilizing the chemical characteristics of the sample clamp, in the heating process, the sample clamp is conveyed to the muffle furnace main body; before the sample heat treatment temperature is reached, oxidation reaction with residual oxygen in the inner cavity of the muffle furnace main body can be carried out, and the residual oxygen in the muffle furnace main body is quickly consumed, so that the inner cavity of the muffle furnace main body can quickly reach a perfect vacuum environment, and the influence of the residual oxygen on the sample heat treatment is avoided; the end, located in the inner cavity of the muffle furnace body, of the gas inlet pipe is provided with the gas guide assembly, replacement gas introduced through the gas inlet pipe enters the inner cavity of the muffle furnace body in a divergent mode through the gas guide assembly, and therefore the phenomenon that an airflow shadow area exists in the inner cavity of the muffle furnace body is avoided, and the content of exhausted oxygen meets the requirement.

The invention discloses a health food quality safety tracing system based on a block chain. According to the system, an optimization model taking health food quality risk assessment as a target is constructed; selecting the total number of bacterial colonies, the number of pathogenic bacteria, solvent residues, water activity, temperature, air pressure, granularity, mixing uniformity, effective component quantification, dissolution rate, residual oxygen amount and the like as core parameters, and constructing an optimized objective function; in addition, the system monitors and adjusts key parameters such as the temperature, the air pressure, the granularity and the residual oxygen content of the health-care food in real time through the AI driving module, and the food safety coefficient is improved; according to the invention, the conversion from passive supervision to active prevention is realized, the food qualification rate and the resource utilization rate are improved, and the method can be used for links of food production, transportation, sales and the like.

The automatic hafnium tetrachloride packaging equipment comprises a glove box capable of being filled with inert gas, the glove box comprises a transfer cavity and a main cavity, and the transfer cavity is an independent cavity body and is arranged at the feeding end of the main cavity; the transfer cavity sequentially comprises a vacuum cavity and a plurality of cleaning cavities in the length direction of the main cavity, and the tail end cleaning cavity communicates with the main cavity. An independent transfer cavity is arranged, the transfer cavity sequentially comprises a vacuum cavity and a plurality of cleaning cavities in the length direction of a main cavity, and a first air isolating valve, a second air isolating valve and a vacuumizing assembly are arranged, so that a multi-stage material purification buffer area is jointly constructed. A material bottle firstly enters the vacuum cavity after being fed into the transfer cavity through the first conveying piece, and a vacuumizing program is started after the second air isolating valve is closed, so that most of gas and moisture are effectively removed; and then sequentially passing through a plurality of cleaning cavities, repeating a circulating purification process of vacuumizing-inert gas filling in each stage of cavity, and gradually removing oxygen and moisture left on the surface and in the environment.

The full-automatic powder packaging equipment with the low residual oxygen content comprises a main machine frame and a packaging bag feeding machine, a main filling mechanism, an air exhaust mechanism, an auxiliary filling machine, a bag opening and edge pressing mechanism and a heat sealing machine are sequentially arranged on the main machine frame, a main conveying line and a weighing belt conveyor are fixedly connected to the main machine frame, the main conveying line is divided into two sections, and the weighing belt conveyor is arranged on the main conveying line. The two main conveying lines are connected with the two ends of the weighing belt conveyor in an end-to-end mode respectively, a vibration assembly is arranged on the main conveying lines and located below the air exhaust mechanism and the bag opening and edge pressing mechanism, and the feeding end of the Y-shaped material box is fixedly connected with an annular inflation pipe. The powder material bagging and filling device has the following beneficial effects that automatic bagging, filling, exhausting and nitrogen filling treatment of powder materials can be achieved, air and powder among the powder materials can be well removed in the packaging process, the residual oxygen amount of packaging is effectively reduced, and the packaging quality is improved.

The application discloses a superconducting circuit preparation method and a quantum chip. The preparation method comprises the following steps: providing a vacuum cavity to accommodate a substrate used for preparing a superconducting circuit; forming an adsorption structure in the interior of the vacuum cavity to adsorb gas impurities in the vacuum cavity; forming a superconducting metal layer on the surface of the substrate; oxidizing the superconducting metal layer to form an oxide film on the surface of the superconducting metal layer; and patterning the superconducting metal layer to obtain the superconducting circuit. The superconducting circuit preparation method provided by the application forms an adsorption structure in the interior of the vacuum cavity before forming the superconducting metal layer on the surface of the substrate, adsorbs residual oxygen, water vapor and other gas impurities in the vacuum cavity by using the adsorption structure, further reduces the content of the gas impurities in the vacuum cavity, greatly reduces the impurity content of the superconducting metal layer formed on the substrate, and effectively guarantees that the prepared superconducting circuit has good electrical performance.

The application relates to a detection method and system for measuring residual oxygen concentration by laser, and relates to the field of gas concentration detection. The method comprises the following steps: selecting laser with oxygen absorption peak wavelength as detection laser, applying a periodically changed modulation signal to form a modulation laser and irradiate the headspace, demodulating a direct current component from the modulation laser passing through the headspace, calculating a deviation rate according to the direct current component and a reference direct current, judging whether the deviation rate is within a threshold value, feeding back and adjusting the laser wavelength if the deviation rate is not within the threshold value, and finally outputting a laser intensity attenuation curve of residual oxygen to obtain the residual oxygen concentration. The detection system comprises an optical subsystem, an electrical subsystem, a feedback control subsystem and a data processing subsystem. The application can accurately measure the residual oxygen concentration in the headspace, effectively detect and correct the laser wavelength drift, and improve the measurement precision and stability.

The invention relates to a pressure swing adsorption type nitrogen generator and a preparation method, and relates to the technical field of nitrogen preparation, the pressure swing adsorption type nitrogen generator comprises a nitrogen preparation device, the nitrogen preparation device comprises a first adsorption tower and a second adsorption tower which are designed to alternately prepare nitrogen, and gas outlets of the first adsorption tower and the second adsorption tower communicate with each other through a connecting pipeline; the middle part of one side of the connecting pipeline is communicated with a gas outlet pipeline communicated with the nitrogen storage tank, so that two lagging sections are formed between the gas outlet pipeline and the two gas outlets and are used for intercepting nitrogen containing residual oxygen, and the gas outlets of the first adsorption tower and the second adsorption tower are provided with oxygen detection pieces; a reverse pressurizing pipeline communicated with the reverse pressurizing pipeline is arranged between the carbon molecular sieve filling block and the gas outlet pipeline on the other side of the lagging section, and through the reverse pressurizing pipeline, the preparation purity of nitrogen can be improved, the pressure difference can be increased, the desorption rate of the adsorption tower can be increased, and the purity of nitrogen prepared in the next process can be improved.

The utility model discloses an automatic hydrogenation nitrogen purification device, which relates to the field of purification devices, and comprises a rack, the top of the rack is fixedly connected with two dryers, a filter, a heater, two coolers, a deaerator and an electric cabinet, the two dryers are fixedly connected to the top of the rack, the two coolers are fixedly connected to the top of the rack, and the filter is fixedly connected to the top of the rack. And the two coolers are fixedly connected to the top of the rack. According to the automatic hydrogenation nitrogen purification device disclosed by the utility model, ordinary nitrogen enters the deaerator filled with the palladium catalyst deoxidation adsorbent, and a large amount of water generated under the action of the palladium catalyst deoxidation adsorbent after oxygen and hydrogen in the ordinary nitrogen are mixed is discharged, so that the residual oxygen content in the nitrogen can be less than ppm, and in view of saving energy consumption, the nitrogen purification efficiency is greatly improved. The adopted palladium catalyst deoxidizing adsorbent can achieve the deoxidizing effect without electric heating, the device does not need operators, all waste gas and waste water are discharged in a centralized mode, and sanitation and cleanliness of a plant are facilitated.

This invention relates to the field of ferrous metallurgy technology and discloses a method for the reduction production of high-purity, low-oxygen-content sponge iron. The method includes: feeding pellets and reducing materials into a rotary kiln for preheating and forming a metallic iron shell on the surface; pulse-injecting a composite reducing liquid into a high-temperature solid-phase bed in a deep reduction zone; using a rotary encoder for feedback to perform dynamic phase-controlled injection, achieving gas-liquid linkage control and nitrogen cooling maintenance; and collecting the finished product through end-stage homogenization, cooling, and magnetic separation. Ammonia gas generated by the pyrolysis of the composite reducing liquid penetrates the metal layer for deep reduction, and a chemical shielding layer is constructed using boron-carbon bonds formed on the microporous surface of the iron matrix. This invention effectively improves the metallization rate of sponge iron, significantly inhibits secondary oxidation of the finished product during kiln exit and storage, and solves the technical problem of high and unstable residual oxygen content in sponge iron.

The invention relates to a positive pressure oxygen respirator protection state and combat radius emergency early warning method, and belongs to the technical field of emergency rescue, and the method comprises the following steps: collecting the residual oxygen pressure of a respirator; collecting the movement distance of the personnel; acquiring the fastest movement speed and average movement speed of the personnel; the collected data is utilized to realize respirator residual protection time risk early warning, personnel return safety place risk early warning, personnel combat radius early warning and respirator airtightness early warning; and giving an emergency command decision based on each early warning result.

The application discloses a kiln production line operation energy consumption data optimization collection and analysis method and system, relates to the technical field of data processing, and comprises the following steps: a kiln car displacement encoder and a pre-buried RFID tag generate a space-time tag; based on the kiln working condition, trigger data collection and obtain pressure fluctuation data; from the pressure fluctuation data, extract the residual oxygen associated component related to the combustion efficiency; when the kiln car enters the rapid cooling area, calculate the deviation of the current rapid cooling area temperature distribution uniformity and the historical reference value, if the deviation exceeds the deviation threshold, then apply the pseudo-random air volume disturbance with the same frequency as the rapid cooling fan; analyze the slope change of the exhaust smoke negative pressure recovery curve and the phase lag amount of the firing zone temperature fluctuation during the disturbance, and generate the air volume redistribution instruction when the slope is greater than the recovery threshold and the phase lag amount exceeds the phase threshold; when the correlation coefficient of the time domain characteristics of the residual oxygen associated component and the residual oxygen concentration change rate exceeds the correlation threshold, output the heat value compensation parameter to the combustion controller.

This invention relates to the field of hydrogen fuel cell technology, specifically to a hydrogen fuel cell exhaust gas moisture removal device. This device connects the residual oxygen connector and residual hydrogen connector of a hydrogen fuel cell and removes moisture from the residual oxygen and residual hydrogen, respectively. It includes a fixed cylinder, a rotating disk, and a rotation drive assembly. By setting a first baffle channel, a second baffle channel, a first guide channel, and a second guide channel within the fixed cylinder, and cooperating with the rotating disk to periodically switch the drying chamber, the problem of insufficient drying and recycling of existing hydrogen fuel cell exhaust gas is solved.

The present application relates to non-ferrous metal combustion technical field, specifically to a kind of dispersion type combustion system control method of aluminium melting furnace, comprising the following steps: adjusting the installation position of burner;Adjust the initial position of natural gas nozzle front valve opening;Multiple adjustment aluminium melting furnace burner ignition gun flame shape and length;Control the switching of flame mode and the proportion of primary air and secondary air;Precise control air-fuel ratio and residual oxygen content of furnace gas;Adjust the continuous blowout purging time of main fire gun and the time of not detecting flame after natural gas nozzle front valve opening, control the action of nozzle front valve;Adjust the frequency of dust removal system fan;Before ignition, if auxiliary smoke gate is in closed state, 3s is needed to open main fire gun again;And increase wild air valve in exhaust fan pipeline;Set ton gas consumption and burner interlock function: set ton gas consumption target value, when actual ton gas consumption reaches target value, burner is extinguished and reminds operator that melting is completed. The method helps to reduce product gas consumption of circular economy smelting furnace, reduce metal burning loss.

The utility model discloses epinephrine hydrochloride liquid medicine production equipment, and relates to the technical field of liquid medicine filling. Comprising a first nitrogen gas curtain arranged at a post-filling station, a preheating station and a wire drawing and sealing station respectively, the first nitrogen gas curtain is communicated with a nitrogen gas source, and the nitrogen gas source is communicated with a second nitrogen gas curtain and a feeding barrel; the second nitrogen gas curtain is arranged at the weighing station, and the feeding barrel is arranged at the liquid medicine filling station; the first nitrogen gas curtain is used for reducing residual oxygen in the ampoule bottle from operation after filling to operation before wire drawing and sealing; the second nitrogen gas curtain is used for reducing residual oxygen in the weighing barrel; and the feeding barrel is used for batching under the protection of nitrogen. According to the utility model, the second nitrogen gas curtain is used for reducing residual oxygen in the weighing barrel, and the feeding barrel is used for batching under the protection of nitrogen, so that the residual oxygen of raw materials is effectively reduced; and meanwhile, through the first nitrogen gas curtain, the time for exposing the ampoule bottle in the air is greatly shortened, and residual oxygen in the ampoule bottle which runs from the time after filling to the time before wire drawing and sealing is effectively reduced.

The invention particularly discloses a method for increasing the aluminum-silicon ratio through coal gangue anoxic roasting and application of the method, and relates to the technical field of solid waste resource utilization, and the method comprises the steps that coal gangue with the initial aluminum-silicon ratio being 0.8-1.0 is crushed; an assistant A and an assistant B are added into the coal gangue, and the assistant A is prepared by mixing vermiculite powder and a cetyltrimethylammonium bromide solution, performing ultrasonic treatment for 30 minutes, and then compounding and calcining with sodium bentonite; the assistant B is prepared by mixing a borax solution and a cerous nitrate solution, evaporating and crystallizing, drying and grinding; a double-helix conical mixer is adopted for mixing, and 0.5% of deionized water is sprayed; sealing the mixture, introducing nitrogen, and maintaining the residual oxygen content lt; the invention discloses an aluminum-rich material with the aluminum-silicon ratio of 3-5.5, the method comprises the following steps of: heating coal gangue to 400 DEG C at the temperature of 2% under normal pressure, preserving heat, roasting at the speed of 8 DEG C / min, cooling to 200 DEG C, performing coarse crushing and alkali dissolution, filtering, washing, drying and micronizing by jet milling to obtain the aluminum-rich material with the aluminum-silicon ratio of 3-5.5, the method can also be applied to preparation of mullite bricks, 4A molecular sieves and porous ceramic filter materials, the process is simple, the cost is low, and high-valued utilization of the coal gangue is realized.

The invention relates to the technical field of pressure swing adsorption nitrogen making machines, in particular to a pressure swing adsorption nitrogen making machine with an oxygen-enriched tail gas recycling function, which comprises a nitrogen making structure, an inlet and outlet pipeline, a pressure applying structure, an oxygen collecting structure and a communicating vessel, the carbon powder container is filled with screening carbon powder; the two ends of the air inlet and outlet pipe are communicated with the upper ends of the two groups of adsorption tanks; the pressing structure is fixedly mounted between two ends of the air inlet-outlet pipe; the oxygen collecting structure comprises a recycling pipe; two ends of the recycling pipe are communicated with the lower edges of the side surfaces of the two groups of adsorption tanks; two ends of the communicating device are communicated with the bottoms of the two groups of adsorption tanks. According to the device, gas in the two adsorption tanks flows in a reciprocating manner through the pressure applying structure, the air is stirred, oxygen on the inner layer is effectively turned out and continuously passes through the carbon molecular sieve, the separation efficiency of oxygen and nitrogen is remarkably improved, and the content of residual oxygen in the nitrogen is reduced.

The invention relates to the technical field of bird's nest and peach gum drinks, in particular to a preparation process of a bird's nest and peach gum drink with a long shelf life, which comprises the following steps: cleaning, grading, cutting, pre-cooking or blanching raw materials, putting the pretreated raw materials into a clean container, controlling the top gap, adding soup or seasoning liquid, and sealing the container to obtain the bird's nest and peach gum drink. The method comprises the following steps of: firstly, carrying out heat exhausting or vacuum can sealing exhausting to exhaust air, immediately and tightly sealing a container, then carrying out high-pressure sterilization at the temperature of 121 DEG C for the time determined according to product characteristics, rapidly cooling to room temperature, storing in a constant-temperature room for 5-7 days, and finally inspecting, labeling and packaging. The preparation technology of the bird's nest peach gum beverage is optimized, the quality and safety of the product in the long-term storage process are remarkably improved, the links of raw material pretreatment, exhausting and sealing are accurately controlled, oxygen residues in the content are effectively reduced, and the product can keep the original color, flavor and nutritional ingredients for a long time.

According to the method for preparing the battery-grade iron phosphate through magnetite and reduction leaching, hydroquinone and ascorbic acid are added into the leaching agent phosphoric acid aqueous solution to serve as a reducing agent together, on one hand, hydroquinone and ascorbic acid have high reducibility, and the phenomenon that the iron source is damaged at the moment when the iron source makes contact with the leaching agent can be avoided; fe < 2 + > released by the magnetite is oxidized into Fe < 3 + > by residual oxygen in the liquid phase, and the reaction path of oxidizing Fe < 2 + > into Fe < 3 + > in the liquid phase is thoroughly blocked, so that the reaction of the elemental iron and the target Fe < 3 + > is promoted; and on the other hand, under the acidic condition, hydroquinone and ascorbic acid can form complexes [Fe (C6H4 (OH) 2)] < 2 + > and [Fe (C6H7O6)] < 2 + > with Fe < 2 + > in a leaching system respectively, the concentration of Fe < 2 + > in a liquid phase is reduced, reaction balance forward movement of ferrous ions released by magnetite is promoted, and the leaching rate of the iron element is greatly increased.

The present invention discloses a wet type cooked beef and beefsteak production process, and relates to the technical field of high-end production of beef. Compared with the prior art, the scheme has the advantages that superior raw material screening is more accurate, A4 / A5 and cattle are adopted, IMF and pH values are detected through filing, and it is ensured that the initial quality is controllable; acid discharge and ripening environment parameters are digitized, the temperature fluctuation is less than 0.5 DEG C, the humidity is accurate to 5%, and the quality fluctuation caused by the fact that a traditional process depends on experience is avoided; the residual oxygen content in high-vacuum packaging is less than or equal to 0.5%, and the microbial pollution risk is reduced by 80% in combination with metal detection; the stacking spacing and the number of layers are strictly controlled, the ripening uniformity is improved by 40% in cooperation with an air circulation system, and standardized production is achieved through regular sampling inspection of the pH value and tenderness. Through the improvements, the tenderness of the beef steak is improved by 30%, the accumulation of flavor substances is increased by 25%, the shelf life is prolonged to 45 days, and meanwhile, the processing loss rate is reduced to 3% or below.

The invention provides a decarburization and dephosphorization method for converter tapping, belongs to the technical field of low-carbon steel smelting in a converter smelting process, and aims to solve the problems of super peroxidation, large iron loss and furnace wall erosion caused by low carbon pulling in existing low-carbon steel smelting. According to the technical scheme, the method comprises the steps that a target steel grade endpoint carbon control interval is set, the ratio of lime to dolomite is adjusted so that the basicity of slag can reach 2.8-3.2, the circular seam flow in the later smelting period is controlled to be larger than or equal to 300 m < 3 > / h, bomb dropping is conducted in the specific carbon content interval, argon is introduced in the tapping stage by stage, stirring is conducted through residual oxygen, and deoxidation alloy and a slagging deoxidizing agent are added when 40-50 tons of steel is tapped. The method can avoid excessive oxygen blowing, reduce iron loss, stabilize slag to protect a furnace lining, inhibit rephosphorization, reduce the dosage of a deoxidizing agent and improve the smelting stability and economy of low-carbon steel.

The invention discloses a cold annealing and pickling method for 430 ferritic stainless steel, belongs to the field of ferrous metallurgy production, and solves the problem that oxide skin is easy to form on the surface of 430 ferritic stainless steel strip steel. The method comprises the following steps of: removing residual rolling oil on the surface of the 430 ferrite stainless steel strip steel in a degreasing section procedure; an annealing furnace temperature control mode is adopted, furnace pressure control of the annealing furnace is stabilized according to the thickness of the strip steel, and the residual oxygen amount of the five heating sections is controlled to be 0.05% or below; and an electrolytic neutral salt section procedure: adopting an electrolytic negative plate made of a stainless steel material, controlling the pH value of the electrolyte to be 3-4, increasing the long circulation volume of neutral salt, and measuring the density of the electrolyte on site. The defects of yellow spots, whitening and the like on the surface of strip steel during cold annealing and pickling production of 430 stainless steel are overcome; the atmosphere of the annealing furnace is stabilized, and the high-temperature section generates the reducing atmosphere by adjusting the air consumption coefficient. Therefore, continuous oxidation of the high-temperature section is restrained.

The invention provides a manufacturing process of spherical titanium alloy powder, which comprises the following steps: mixing titanium hydride powder and an adhesive, internally mixing, granulating, primarily shaping, screening, drying, mixing with an active metal simple substance, performing vacuum degreasing and sintering to obtain a sintered block, and performing chemical corrosion, crushing, fine grinding and secondary shaping to finally obtain high-sphericity titanium alloy powder. According to the process, the sphericity degree of the powder reaches 50% or above in the primary shaping process and is further improved to 70% or above in the secondary shaping process, and the flowability, the filling density and the sintering uniformity of the powder are effectively improved. Meanwhile, active metal elementary substances are introduced in the vacuum degreasing and sintering process to serve as sacrificial agents, the dehydrogenation and deoxidation efficiency is improved, oxygen impurity residues are reduced, and the compactness and purity of titanium alloy products are improved. Besides, by accurately controlling the drying temperature, humidity and time and optimizing the temperature, the heating rate and the vacuum degree of each stage of vacuum degreasing sintering, the uniformity and the material performance of the sintered block are remarkably enhanced. The process is efficient, low in energy consumption and suitable for titanium alloy near-net forming, and has good industrial application prospects.

The invention discloses wear-resistant modified graphene lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oil, the wear-resistant modified graphene lubricating oil comprises the following raw materials: alkyl naphthalene base oil, sodium stearate, an antioxidant 5057, an organic silicon defoamer, polyisobutylene succinimide and a wear-resistant modified graphene additive; gamma-glycidyl ether oxypropyl trimethoxy silane is used for modifying graphene oxide in advance, accumulation between graphene sheet layers can be effectively prevented, agglomeration is avoided, then reduction is performed through vitamin C, residual oxygen-containing functional groups are removed, a conjugated structure is recovered, epoxy groups are reserved, and different from traditional hydrothermal synthesis, the preparation method has the advantages that the preparation method is simple, and the preparation cost is low. The graphene oxide and the carbon quantum dots only have physical adsorption, so that the graphene oxide and the carbon quantum dots can be prevented from falling off in high-pressure, strong-shearing-force and local high-temperature environments in the friction process, and the antifriction effect can be stably exerted for a long time.

This invention belongs to the field of annealing furnace technology, specifically an annealing atmosphere control component, an annealing furnace, and its usage method. Addressing the problems of low gas replacement efficiency, poor sealing, and safety hazards during furnace opening in traditional equipment, the following technical solution is proposed: Liftable furnace doors are provided on both sides of the furnace body, forming a sealed cavity with the trolley; the annealing atmosphere control structure includes a dual-gas box system, with protective gas injected from the furnace bottom via a gas guide pipe, utilizing density differences to form a stable upward airflow; the sealing structure achieves a complete seal between the furnace body, trolley, and furnace door through a combination of annular sealing strips and double-layer bottom sealing strips; the protective structure uses a damping rotating shaft-linked arc-shaped protective plate that automatically unfolds to form a safety barrier when the furnace is opened; this device, through optimized gas flow path, multi-stage sealing design, and combined furnace opening protection, effectively reduces residual oxygen content, prevents gas leakage, and ensures operational safety, making it suitable for high-precision metal annealing.

The invention relates to the field of metallurgy, in particular to a smelting method of high-purity high-carbon bearing steel GCr15, the process route comprises KR molten iron pretreatment, BOF converter primary smelting, VD vacuum treatment, LF refining and continuous casting, the refining desulfurization burden is relieved through KR molten iron pretreatment, and the lower sulfur content of a finished product is achieved; weak deoxidation is adopted in the BOF converter, Al deoxidation is not used, excessive turning of molten steel is avoided, and oxidability is controlled; molten steel directly enters VD after BOF tapping, and carbon in the molten steel reacts with residual oxygen in the molten steel and unstable oxides in steel slag under high vacuum of VD; the molten steel is further deoxidized, alloyed, heated, softly blown and stood in the LF; molten steel is subjected to protective casting in a continuous casting machine. According to the method, the aluminum consumption of the high-carbon bearing steel GCr15 in the whole process is smaller than or equal to 0.3 kg / t steel, continuous and stable casting is achieved, and the total oxygen content of the steel is smaller than or equal to 0.0006%.

A method for optimizing a direct-to-gasification process for regulating the combustion air feed rate of a square box furnace. In the method, a direct-to-gasification process flow is obtained, current combustion data of the square box furnace is extracted, a current baseline state assessment is performed on the direct-to-gasification process, and based on the current fuel gas feed, the combustion air feed rate of the square box furnace is adjusted to construct a trend graph of flue gas residual oxygen content, air feed rate, fuel gas feed rate, and combustion heat release; trend graphs of flue gas residual oxygen content, air feed rate, fuel gas change, by-product steam change, and annual operating cost savings corresponding to a first strategy and a second strategy are drawn to determine the economically optimal strategy under different flue gas residual oxygen content targets and its corresponding air feed rate, fuel gas change, and by-product steam change.