974 results about "Decarburization" patented technology

The invention provides an online detection and compensation method for local decarburization of a high-strength spring steel band, which comprises the following steps: arranging an oxygen content sensor in a continuous annealing furnace to monitor oxygen concentration in real time, and marking a potential decarburization risk section; scanning the risk section steel strip by adopting infrared thermal imaging, and generating a carbon distribution map to position a decarburization area; pulse laser heating is conducted on the decarburization area, and methane-argon mixed gas is introduced to achieve in-situ carburization; and finally, local thermal stress is eliminated through high-frequency induction heating. According to the method, decarburization risk dynamic early warning, defect accurate positioning, local efficient carbon supplementation and stress homogenization control are achieved, and the surface quality and fatigue performance of the steel strip are remarkably improved.

The invention relates to large-specification alloy spring steel and a production method thereof. The control process comprises the steps of steelmaking, bloom continuous casting, heating cogging, coping flaw detection, anti-decarburization segmented spraying, small square billet heating, high-speed wire controlled rolling, stelmor wire controlled cooling and coil collecting and packaging. And the surface quality and the structure property uniformity of the wire rod are effectively improved by combining segmented spraying of the anti-decarburization coating with a refined controlled rolling and controlled cooling process, and the wire rod can be used for preparing the large-size high-strength automobile suspension spring.

The invention relates to the technical field of metal injection molding, and discloses a process for preparing an ultrahigh-toughness MIM part through integration of multistage degreasing and gradient sintering, and the process comprises the following steps: metal powder and a binder are mixed in proportion, and uniform feed is obtained after banburying and granulation; injection-molding the feedstock into a green body; the green body is sequentially subjected to catalytic degreasing and stepped thermal degreasing, the catalytic degreasing is carried out in a nitric acid-containing atmosphere, and the thermal degreasing is carried out in a multi-stage heating procedure under the protection of inert gas; and carrying out multi-stage gradient sintering on the degreased green body in a vacuum or inert atmosphere, wherein the multi-stage gradient sintering comprises low-temperature pre-sintering, medium-temperature deoxidization and decarbonization and high-temperature densification sintering. According to the invention, through organic combination of multi-stage catalytic degreasing and stepped thermal degreasing, efficient and thorough removal of the binder is realized, carbon residues, bubbles and internal defects caused by incomplete degreasing are effectively avoided, and the quality of the green body and the structural integrity before sintering are improved.

The invention discloses a method for separating valuable metal in a waste photovoltaic welding strip through reduction smelting-vacuum gasification-vulcanization, and belongs to the technical field of resource recycling. The method comprises the steps that the waste photovoltaic welding strip is placed in a reducing atmosphere and heated for reduction smelting, so that carbon impurities on the surface of the waste photovoltaic welding strip are removed, tin, lead, silver and copper oxides on the surface are reduced, and a copper-tin-lead-silver alloy is obtained; then, heating the decarbonized and deoxidized photovoltaic welding strip under a vacuum condition, and carrying out vacuum gasification separation to obtain condensed metal lead and a copper-tin-silver alloy; and finally, sulfur is added into the copper-tin-silver alloy for vacuum vulcanization-separation, and volatile matter stannous sulfide and residual copper-silver alloy are obtained. According to the method, valuable metals in the waste photovoltaic solder strip can be efficiently separated, and the method has the advantages of being green and economical.

The invention discloses a method for improving castability of a high-purity industrial pure iron small square billet production line. The method comprises the following steps of KR molten iron pretreatment, converter smelting, LF refining, RH vacuum treatment and continuous casting. According to the method, in the early stage of LF, oxidizing slag is used for removing manganese and phosphorus, in the later stage, slagging-off modification treatment is carried out, a minimum LF and minimum outbound oxygen formula is formulated, so that the RH carbon-oxygen reaction requirement is met, vacuum natural decarburization is used, RH end point carbon can be stably controlled to be 0.0007-0.001%, after RH aluminum is added for deoxidation, a calcium deoxidizing agent is added under the low-true-degree condition for inclusion denaturation, and the RH carbon-oxygen reaction requirement is met. By means of the method, continuous production can be achieved on an industrial pure iron small square billet production line, the finished product C is smaller than or equal to 0.0015%, Mn is smaller than or equal to 0.025%, P is smaller than or equal to 0.003%, S is smaller than or equal to 0.003%, the high industrial level can be achieved, the number of continuous casting furnaces is larger than or equal to 7, and the method is particularly suitable for producing pure iron on a production line without RH top lance equipment in the RH procedure.

The invention discloses a NiCu-based alloy catalyst for preparing high-value products through natural gas decarbonization and application of the NiCu-based alloy catalyst, and belongs to the technical field of natural gas high-value catalytic conversion. The preparation method of the NiCu-based alloy catalyst comprises the following steps: (1) adding nickel nitrate hexahydrate and urea into hot water, adding ethylene glycol, carrying out a stirring reaction at 120-150 DEG C, and calcining the obtained intermediate to obtain a nickel oxide precursor; (2) adding a copper nitrate aqueous solution and ammonia water into the nickel oxide precursor, so that copper ions are anchored on the surface of nickel oxide, drying and calcining to obtain a Ni-Cu alloy oxide precursor; and (3) adding the Ni-Cu alloy oxide precursor, bismuth trioxide and metallic tin into deionized water, adding a complexing agent, carrying out ultrasonic treatment, and carrying out H2 reduction calcination on the obtained precipitate to obtain the Ni < x > Cu < y > Bi < z > Snm alloy. The NiCu-based alloy catalyst is used in a natural gas decarburization high-value product preparation reaction, and the natural gas decarburization reaction is sufficient, and long-term efficient conversion and stable operation are achieved by combining the synergistic effect of ultrasonic waves and an alternating magnetic field.

The invention discloses a calcination and afterburning integrated coal gangue decarbonization device. The coal gangue decarbonization device comprises a shell, a multi-channel pulverized coal combustion gun and a secondary air heating combustor, an air reversing cavity, a combustion cavity and a calcination cavity which are sequentially communicated in the gas flowing direction are formed in the shell, the air reversing cavity is provided with a secondary combustion-supporting air inlet, the combustion cavity is provided with a primary air inlet and a tertiary combustion-supporting air inlet, and the calcination cavity is provided with a coal gangue feeding port. The multi-channel pulverized coal combustion gun is inserted into the primary air inlet, and the secondary air heating combustor is arranged close to the secondary combustion-supporting air inlet. The structure of the coal gangue calcining device is simplified, the problems of material cost, air leakage, heat loss and the like of external equipment and pipelines are reduced, and the construction and operation cost of the coal gangue calcining device is reduced. Meanwhile, through the hot air chamber furnace structure adapting to fine powder combustion and the high-temperature secondary air heating process design, the problems that the low-heating-value coal gangue is difficult to ignite and the heat value cannot be released are solved, and suspension calcination of the low-heating-value coal gangue is achieved.

The invention discloses a method for preparing coal and calcined kaolin through coal gangue grinding and grading-acid leaching-suspension calcination, and belongs to the technical field of coal gangue beneficiation. According to the method disclosed by the invention, the three stages of ore grinding flotation, acid leaching purification and fine grinding calcination complement each other, so that fine-grained calcined kaolin of which the content of-7 microns is greater than or equal to 90% and the whiteness is greater than or equal to 90% and ultrafine-grained calcined kaolin of which the content of-2 microns is greater than or equal to 90% and the whiteness is greater than or equal to 90% are prepared. According to the method, effective separation of coarse coal, leaching and purification of impurity iron elements and calcination and purification of fine-grained kaolin are realized through step grinding and step separation; the gas-solid reaction degree is improved and sintering is avoided by utilizing the dispersion and suspension characteristics of fine-particle materials; the dehydroxylation and decarburization reactions can be carried out completely by calcining fine materials and precisely controlling the temperature, so that the whiteness of the calcined kaolin product is remarkably improved. According to the method, the adaptability to coal gangue raw ore is improved, and meanwhile, a new thought is provided for efficiently preparing a calcined kaolin product from the coal gangue and cooperatively recycling coal resources.

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 discloses a method for improving the molybdenum yield in the direct alloying process of molybdenum oxide, which comprises the following steps of: 1, adjusting the lance position of an oxygen lance, and detecting a sonar slagging curve and a CO curve: judging the foaming performance of slag by combining sonar slagging and a furnace gas CO curve in the smelting process; step 2, molybdenum oxide is added, bottom blowing is enhanced, and the lance position of an oxygen lance is reduced; and step 3, the lance position is further reduced, the lance position is reduced to 0.1-0.3 m below the basic lance position, the decarburization speed is increased to 0.3% / min or above, volatilization of molybdenum oxide is inhibited through slag foaming and high CaO content, and the yield of molybdenum is increased. The slag composition and foaming performance are controlled by adjusting the lance position of the oxygen lance, the slag foaming performance is judged by combining sonar slagging and a furnace gas CO curve, a molybdenum oxide raw material is added when the slag foaming performance is good, and meanwhile volatilization of molybdenum oxide is inhibited through slag foaming and high CaO content. The sublimation of molybdenum oxide is effectively prevented, the yield of metal molybdenum can reach 95% or above, and the production cost of the molybdenum-containing steel grade is reduced.

The invention discloses a method for producing ultra-low carbon steel by an electric furnace process, which comprises the following steps: in the electric arc furnace smelting process, blowing carbon powder and CO2 by using a carbon gun, tapping after the component temperature of molten steel reaches the standard, and adding lime and limestone in the tapping process to obtain primary molten steel; slagging off after a steel ladle enters an LF station, adding aluminum slag into an LF furnace for slag modification, raising the temperature to heat molten steel, and discharging from the station to obtain LF refined molten steel; after a steel ladle enters an RH station, vacuumizing, using argon as circulation gas, spraying metal oxide powder and O2 by using a top lance, carrying out deep decarburization and denitrification at the same time, adding a metal material in the final stage of RH furnace refining to carry out deoxidation alloying, and then breaking vacuum and leaving from the station to obtain RH refined molten steel; and the steel ladle enters a continuous casting station for casting, and the ultra-low carbon steel is obtained. The method can solve the technical problem of producing ultra-low carbon steel in an electric furnace process, and is good in product quality and high in production efficiency.

The invention relates to a preparation method of ultralow-carbon ultralow-sulfur low-nitrogen steel, and belongs to the technical field of ferrous metallurgy. The method comprises the following steps: smelting a raw material containing waste steel in an electric furnace to obtain first molten steel; the first molten steel is subjected to sectional type LF refining, and second molten steel with the preset sulfur content is obtained; wherein the sectional type LF refining comprises LF refining of a light desulfurization section, a slagging-off section and a deep desulfurization section for spraying calcium oxide powder which are arranged in sequence, and the temperature of the first molten steel in the light desulfurization section is controlled; and the second molten steel is subjected to RH vacuum smelting, decarburization and denitrification are conducted, oxygen blowing operation is conducted in the RH vacuum smelting process, and the ultralow-carbon ultralow-sulfur low-nitrogen molten steel is obtained. The ultralow-carbon ultralow-sulfur low-nitrogen molten steel is prepared from the following components in percentage by mass: less than 20 ppm of oxygen, less than 0.0030% of nitrogen, less than 0.0030% of sulfur and less than 0.0020% of carbon.

The utility model relates to the technical field of natural gas production, in particular to natural gas desulfurization and decarbonization equipment which comprises a supporting table and a natural gas impurity removal assembly, the natural gas impurity removal assembly comprises a separation tank, a gas inlet pipe, a one-way valve, a conveying pipe and a protection valve, and the separation tank is detachably connected with the supporting table and located above the supporting table; the gas inlet pipe is fixedly connected with the separation tank and located on one side of the separation tank, the one-way valve is fixedly connected with the gas inlet pipe and located in the gas inlet pipe, the conveying pipe is fixedly connected with the separation tank and located on the side, close to the gas inlet pipe, of the separation tank, and the protection valve is fixedly connected with the conveying pipe and located in the conveying pipe. Therefore, the problems that in the prior art, a multi-filtering mechanism cannot rapidly separate sulfide, a certain time is needed to naturally separate sulfide in natural gas, and practicability is low are effectively solved.

The invention discloses spring round steel with high strength, high toughness and long fatigue life and a production method of the spring round steel, and belongs to the technical field of spring round steel production, the key of the chemical components of the spring round steel is that the spring round steel comprises 0.90-1.10% of Ni and 0.13-0.17% of V, and the content of harmful elements such as O, N, S and P is strictly controlled. Ultra-low oxygen content and extremely high purity are ensured by adopting VD vacuum refining, surface decarburization is effectively prevented by applying argon and vacuum atmosphere protection heating, non-recrystallization region low-temperature rolling is implemented to refine grains, and an optimized quenching and medium-temperature tempering heat treatment system is matched. The technical bottlenecks that the strength and toughness of traditional spring round steel are difficult to consider, and the fatigue life is easily influenced by inclusions and decarburized layers are successfully solved, the final product still has excellent impact toughness and extremely long fatigue life when the tensile strength reaches the ultra-high strength level of 1900 MPa or above, the comprehensive performance is remarkably superior to that of an existing product, and the production cost is reduced. And the harsh requirements of automobile light weight on high-performance spring materials are met.

This invention belongs to the field of iron and steel metallurgical technology, specifically a high-purity IF steel production process. It employs a dual-control system of RH+VD (Reverse Hydrogenation and Vapor Deoxidation). RH is used for decarburization of the molten steel. After RH degassing, a top slag modifier is added, and the steel is then fed into a VD furnace for bottom-blown hydrogen deoxidation and alloying. No deoxidizing alloys are used during this process. This invention separates decarburization and deoxidation, avoiding the safety hazards caused by the coexistence of hydrogen and oxygen. It also utilizes stronger molten pool stirring for efficient pre-deoxidation of the top slag, while bottom-blown reducing gas deoxidation not only reduces oxygen content but also avoids the risk of secondary oxidation of the molten steel by the slag. Furthermore, the degassing capacity of the VD furnace removes residual hydrogen and nitrogen. This invention reduces safety hazards, improves the cleanliness of the molten steel, and increases alloy yield, thus achieving the production of high-purity IF steel.

The invention discloses a system and method for gasification device, gas-based shaft furnace and electric furnace coupling steelmaking, and belongs to the technical field of ferrous metallurgy. The invention provides a system for gasification device, gas-based shaft furnace and electric furnace coupling steelmaking. The system comprises a pretreatment device, a conveying device, a gasification device, a heat exchange device, a gas-based shaft furnace device, an electric furnace device and a decarburization device. The system is an integrated coal gasification and gas-based shaft furnace system, it is ensured that synthesis gas (mainly including CO and H2) generated by the coal gasification furnace is directly supplied to the shaft furnace, no extra device needs to be added for heating, and energy loss in the intermediate transmission process is reduced by optimizing the technological process. The invention aims to realize efficient coupling of coal gasification, the gas-based shaft furnace and the electric furnace by optimizing the system flow, improving the energy utilization efficiency and reducing the production cost.

The invention relates to the technical field of adsorption, in particular to a device and process for coupling pressure swing adsorption carbon capture and gas combustion waste heat utilization, the device comprises a temperature swing adsorption pretreatment unit and a pressure swing adsorption unit, the temperature swing adsorption pretreatment unit is used for adsorbing and removing impurity components in blast furnace gas, and the pressure swing adsorption unit is used for adsorbing and removing the impurity components in the blast furnace gas; then, high-purity CO2 product gas is obtained through a pressure swing adsorption unit; the residual decarbonized coal gas adsorbed by the pressure swing adsorption unit is converted into high-temperature flue gas, and then the high-temperature flue gas enters the temperature swing adsorption pretreatment unit again for heat recovery, and meanwhile, the heat is utilized to desorb impurity components of the adsorbed blast furnace gas. According to the invention, blast furnace gas pretreatment and a CO2 capture system are combined, so that the recycling of blast furnace gas and the efficient capture of CO2 are realized, the capture efficiency of CO2 is improved, the energy waste is reduced, and the cyclic operation of equipment is realized.

The invention belongs to the technical field of blast furnace decarburization systems, and particularly discloses a hydrogen-rich carbon circulating blast furnace top gas carbon dioxide capture solution vacuum phase change regeneration system which comprises an absorption tower, a flash tank and a regeneration tower, the bottom and the top of the absorption tower are communicated with a top gas pipe and an ammonia liquid inlet pipe respectively, and a decarburized gas outlet pipe is arranged at the top of the absorption tower; a bottom outlet of the flash tank is communicated with a regeneration tower through a pipeline; a bottom outlet of the regeneration tower is communicated with an evaporator; one side of the evaporator is communicated with a vacuum pipe; one end of the vacuum pipe is communicated with a vacuum phase change direct heating machine; and a cooling unit for cooling the vacuum tube is arranged outside the vacuum tube. The problems that a traditional amine liquid regeneration method is low in regeneration efficiency and high in energy consumption are solved. By combining vacuum flash evaporation, the regeneration efficiency of the amine liquid is remarkably improved, meanwhile, energy consumption and amine liquid loss are reduced, and the purpose of low-carbon metallurgy is achieved.

The invention relates to the technical field of vanadium extraction from stone coal, in particular to a method for extracting vanadium and molybdenum from stone coal vanadium ore. The method comprises the following steps: carrying out decarburization roasting and sodium salt roasting on a stone coal vanadium ore grinding sample; immersing into a sulfuric acid solution for acid leaching, and separating acid leaching liquid and acid leaching residues after acid leaching; a trihexyl (14) phosphonyl chloride organic solution in a proper concentration range is used as an extracting agent for an acid leaching solution, and step-by-step selective extraction is realized by utilizing the remarkable difference of extraction behaviors of molybdenum and vanadium under different pH values; preferably selecting the concentration of the sulfuric acid solution to efficiently strip molybdenum and vanadium in the organic phase respectively; carrying out ammonia leaching on the acid leaching residues to extract residual molybdenum; and carrying out molybdenum precipitation and vanadium precipitation reaction, and calcining to obtain vanadium and molybdenum fine powder products. According to the method, efficient collaborative recovery of vanadium and molybdenum is achieved, the purity of the obtained vanadium and molybdenum fine powder product is extremely high, the high-end application requirement is met, and the method has important industrial application value.

The invention relates to corrosion-resistant spring steel for a high-speed railway elastic strip and a production method thereof, and belongs to the technical field of metallurgy. The spring steel comprises the following chemical components in percentage by mass: 0.55 to 0.60 percent of C, 1.6 to 2.0 percent of Si, 0.70 to 0.90 percent of Mn, 0.015 to 0.035 percent of P, less than or equal to 0.005 percent of S, 0.10 to 0.30 percent of Ni, 0.50 to 0.70 percent of Cr, 0.10 to 0.20 percent of Cu, 0.02 to 0.04 percent of Nb, less than or equal to 0.03 percent of Al, 0.01 to 0.03 percent of RE and the balance of Fe and inevitable impurities. The production method comprises the steps of smelting, continuous casting, heating, rolling and heat treatment. An elastic strip processed from the spring steel has the advantages of high surface decarburization resistance, excellent fatigue resistance, excellent corrosion resistance, excellent hydrogen embrittlement resistance and the like, and meets the requirements of complicated and harsh working conditions of railways.

The utility model discloses a protective atmosphere mixing device of a humidifier for oriented silicon steel decarburization production, which belongs to the technical field of oriented silicon steel decarburization devices and comprises a mixing tank, an air inlet pipe, an air outlet pipe and an air outlet pipe. The gas collecting hood is connected to the mixing tank and covers the opening of the mixing tank, and a gas outlet pipe is arranged on the gas collecting hood; a flow guide member; gas such as nitrogen and hydrogen enters the flow guide part from different gas inlet pipes, the direction of the gas is changed after the gas impacts the inner wall of the flow guide part, so that the gas is premixed in the flow guide part, the premixed gas enters the turbulent flow gaps, the direction of the gas is changed multiple times under the action of the turbulent flow plates, and the gas flow is uniform. According to the decarburization device, mixing of gas in the turbulent flow channel is achieved, the gas continues to flow, impacts the mixing pore plate and changes the direction, remixing of the gas is achieved, the mixed gas flows into the humidifier from the gas outlet pipe under the flow guiding effect of the gas collecting hood, uniform mixing of protective atmosphere is achieved, and the stability of the decarburization effect is guaranteed.

The application discloses an integrated desulfurization and decarbonization particle separation external circulation spouting fluidized bed and a running method thereof, and belongs to the technical field of flue gas desulfurization and decarbonization. The fluidized bed is provided with a gas inlet at the bottom, a micro cyclone separator is arranged in the fluidized bed, a spouting bed gas inlet is communicated with a fluidized bed exhaust port, a micro cyclone separator exhaust port is communicated with the fluidized bed exhaust port, and the bottom of the micro cyclone separator is communicated with the outside. A calcium oxide feeding port is arranged at the lower end of the spouting bed, the top of the spouting bed is communicated with a cyclone separator gas inlet, a cyclone separator exhaust port is communicated with a calcining furnace inlet, and the calcining furnace is provided with a carbon dioxide discharge pipe. The intermittent fluidized bed is provided with a calcium hydroxide slurry inlet at the top, the calcium oxide feeding port is provided with a sealing cover, the calcining furnace outlet is communicated with a calcium oxide powder discharge pipe or a material guide pipe inlet, and the material guide pipe outlet is communicated with the lower end of the spouting bed. The continuous fluidized bed is provided with a liquid inlet at the top, the calcium oxide feeding port is an opening, the calcining furnace outlet is communicated with the material guide pipe inlet, and the material guide pipe outlet is communicated with the fluidized bed.

The invention belongs to the technical field of environmental protection of pollutant recycling, and particularly relates to a process method for torsion loss of an ammonium sulfate section and a desulfurization section of coke oven gas. The method comprises the following related steps: (I) preparing a Ca (OH) 2 emulsion from CaO and water, reacting with coke oven gas to generate a first system containing CaS and CaCO3, introducing CO2 into the CaS emulsion to analyze H2S, and absorbing with NaOH to prepare Na2S so as to complete desulfurization and decarbonization; (II) hydrolyzing MgO to prepare a Mg (OH) 2 emulsion, reacting with flue gas SO2 and air to generate MgSO4, reacting with desulfurized and decarbonized coal gas to generate magnesium ammonium sulfate and regenerated Mg (OH) 2, and completing deamination; and (III) carrying out spraying reaction on HCN in the coal gas and NaOH through scrap iron, and filtering and evaporating to obtain ferrocyanide. The process treats pollution with waste, realizes medium circulation, has high product value, and solves the problems of corrosion and loss in the prior art.

The invention belongs to the technical field of carbon neutralization, and discloses a synergistic efficient low-carbon electrolysis water and total-oxygen blast furnace coupled low-carbon steel coproduction system. Comprising an electrolyzed water system; a blast gas inlet of the total-oxygen blast furnace system is connected with an oxygen outlet of the electrolyzed water system, and the total-oxygen blast furnace system is used for receiving oxygen to generate top circulating coal gas rich in carbon monoxide and carbon dioxide; an inlet of the coal gas purification system is connected with a circulating coal gas outlet of the total-oxygen blast furnace system; a first inlet of the methanol synthesis system is connected with a hydrogen outlet of the water electrolysis system, a second inlet of the methanol synthesis system is connected with a purified gas outlet of the gas purification system, and the methanol synthesis system is used for receiving hydrogen and purified circulating gas to generate methanol; the circulating gas heating system is arranged in a circulating gas path between the gas purification system and the total-oxygen blast furnace system and is used for heating circulating gas returned to the blast furnace; an inlet of the flue gas decarburization system is connected with a combustion flue gas outlet of the circulating gas heating system, and the flue gas decarburization system is used for conveying carbon dioxide in the flue gas to the second inlet.

A system to treat coke oven gas (COG), in particular coke oven gas produced by a steel plant, configured to receive a coke oven gas stream. The innovative system comprises a compression unit (100) configured to receive the coke oven gas stream, to compress it and to discharge a compressed coke oven gas stream; a separation unit (200) configured to receive the compressed coke oven gas stream, perform a hydrogen (=H2) separation and discharge an hydrogen stream and a gas stream comprising methane (=CH4) and other unreacted components of the coke oven gas stream; a pyrolysis unit (300) configured to receive the gas stream comprising methane and other unreacted components of the coke oven gas and perform pyrolysis of the stream comprising methane and other unreacted components of the coke oven gas stream so to discharge solid carbon (=C) and a gas stream comprising hydrogen and other unreacted components of the coke oven gas stream.

The present application provides a method for preparing ceramic paving stone products by using large amount of decarburized coal gangue, and relates to the technical field of coal gangue resource utilization, which comprises the following steps: decarburizing and color selecting the coal gangue to obtain high-aluminum light-gray decarburized coal gangue, high-silicon gray-black decarburized coal gangue and / or high-iron calcium red-brown decarburized coal gangue; two or more of the coal gangues are proportioned according to the proportion suitable for ceramics, and a composite fluxing agent and / or a lignin additive are selected; after being pressed into a green body, the mixture is fired at 1150-1170 DEG C for 15-20 minutes, and then cooled to obtain a ceramic product with a high total amount of coal gangue; or a high-grade light-color ceramic can be prepared by mixing 40% of single light-gray decarburized coal gangue. The method realizes the high-mixing application of coal gangue in ceramics, and significantly improves the stability and economy of the product by using the composite fluxing agent in cooperation with plasticity enhancement while reducing the firing temperature.

The invention relates to the technical field of flue gas multi-pollutant synergistic purification, in particular to a preparation method of an ultralow-temperature denitration and decarbonization catalyst and application of the ultralow-temperature denitration and decarbonization catalyst to synchronous removal of nitrogen oxides and carbon monoxide in industrial flue gas. The catalyst is prepared by a two-step method comprising the following steps: S1, dispersing a cerium source and a platinum source in absolute ethyl alcohol, and synthesizing a Pt / CeO2 monatomic catalyst by a hydrogen combustion method; s2, compounding an iron source and Pt / CeO2 through a coprecipitation method, drying and calcining in a nitrogen atmosphere to obtain the Fe-Pt / CeO2 composite catalyst. The key process parameters comprise hydrogen / oxygen flow velocity, calcination temperature and mass ratio of the iron source to the carrier. The synergistic removal efficiency of the catalyst on NOx and CO at the ultralow temperature of 50-120 DEG C reaches 85% or above, and the bottleneck that the low-temperature activity of a traditional catalyst is insufficient is broken through; sulfur resistance and water resistance are remarkably improved through the porous structure and the oxygen storage capacity of CeO2, and the activity retention rate is larger than 90% when SO2 and H2O are contained; the device is suitable for high-efficiency purification of complex flue gas of steel, waste incineration and the like, and meets the policy requirements of pollution reduction, carbon reduction and synergistic interaction.

The present application belongs to the technical field of intelligent control and modeling of steel metallurgy process, and relates to a kind of converter decarburization reaction kinetics prediction model construction method and system, comprising: constructing converter end steel composition TSO prediction model;According to the real production data and the steel composition TSO prediction model, the TSO content prediction result of the converter end steel composition is obtained by prediction;Introducing control parameter to correct the preset decarburization reaction kinetics basic model;Each TSO content prediction result is used as end constraint, the parameter iterative optimization of decarburization reaction kinetics basic model is carried out, and based on the corrected decarburization reaction kinetics basic model and the optimal result of parameter, the optimized converter decarburization reaction kinetics prediction model is obtained.The present application realizes the adjustable dynamic modeling of converter decarburization process, can accurately capture the influence of control parameter change on converter smelting decarburization reaction, realizes the closed-loop iteration mechanism of prediction, feedback and correction, and guarantees the continuous leading of model performance.

The utility model provides a membrane filtration decarburization device for biogas production, which relates to the technical field of biogas production and comprises a reaction mechanism and a main body mechanism, the reaction mechanism comprises an oxidation tank, a cover plate is clamped at the top of the oxidation tank, a stirring shaft is inserted into the cover plate in a penetrating manner, a stirring paddle fixedly sleeves the outer surface wall of the stirring shaft, an agent inlet pipe, an oxygen inlet pipe and an air inlet pipe are fixedly communicated with the top of the cover plate, and a motor is fixedly mounted at the top of the cover plate. And the output end of the motor is fixedly connected with the top end of the stirring shaft. According to the device disclosed by the utility model, a catalyst is poured into the oxidation tank from the catalyst inlet pipe, biogas is introduced by utilizing the gas inlet pipe, oxygen is introduced by utilizing the oxygen inlet pipe, and the stirring paddle is driven to rotate by utilizing the motor, so that the catalytic oxidation efficiency is conveniently improved, hydrogen sulfide and volatile organic compounds in the biogas are removed, and metal parts in the device are prevented from being corroded; the separation performance of the membrane is influenced.

The invention belongs to the technical field of ferrous metallurgy, and relates to a reducing gas heating system and process for hydrogen metallurgy, the system comprises a heating furnace, a hydrogen-based shaft furnace, a decarburization device and gas connecting pipelines among the devices; the heating furnace is used for preheating reducing gas and supplying the reducing gas to the hydrogen-based shaft furnace; reaction gas generated by the hydrogen-based shaft furnace is decarbonized by a decarbonization device to generate reducing gas and decarbonized tail gas; a burner is arranged on the heating furnace and is respectively connected with decarburized tail gas, reaction gas and an external gas pipe; a decarburized tail gas preheater is arranged on a smoke exhaust pipe of the heating furnace; an outlet of the decarburized tail gas main pipe is respectively connected with a decarburized tail gas diffusing pipe and a decarburized tail gas burner supply pipe; a reducing gas pipeline is connected with the heating furnace; the decarburization tail gas burner supply pipe is connected with the decarburization tail gas preheater, and the preheated decarburization tail gas is supplied to a burner of the heating furnace. The byproduct gas in the hydrogen metallurgy process is fully utilized as the fuel of the heating furnace, the energy utilization efficiency is effectively improved, and the production cost is reduced.