537 results about "Decarburization" patented technology

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 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 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.

Method for producing liquid steel in an electric arc furnace with final decarburization The invention relates to a method for producing liquid steel in an electric arc furnace (2) comprising successively: - melting a metal load in the electric arc furnace (2) for generating a steel bath (10); - denitrogenating the steel bath (10) to reach a nitrogen content %N below a targeted nitrogen content %Ntarg, wherein the carbon content %C remains greater than a targeted carbon content %Ntarg; - applying a final decarburization treatment to reach a carbon content %C ≤ %%Ntarg, to reach an oxygen content %Op greater than 200 ppm, wherein oxygen is injected at a flow rate above 0.3 Nm3 / min / ton, the ambient air being at a pressure of above 90% of the atmospheric pressure; - tapping the steel bath (10), the oxygen content %Op reached by the final decarburization treatment being maintained up to the tapping.

The invention discloses a coal by-product resource utilization method based on reduction roasting-magnetic separation enrichment, and belongs to the technical field of coal processing by-product resource utilization. The invention provides a combustion oxidation decarburization-high-temperature reduction roasting-ore grinding dissociation-high gradient magnetic separation combined iron extraction process. Comprising the steps that liquefied slag is oxidized and decarbonized to generate ash (iron-containing minerals are oxidized into Fe2O3), reduction roasting is conducted (Fe2O3 is converted into Fe3O4), ore grinding dissociation is conducted (intergrowth of Fe3O4 and gangue minerals is dissociated, monomer dissociation is achieved, and the magnetic separation efficiency and the iron ore concentrate quality are improved), high-gradient magnetic separation is conducted (Fe3O4 concentrate and non-magnetic gangue tailings are obtained), and efficient iron extraction is achieved. In addition, effective recovery and efficient utilization of resources are achieved, heat generated in the oxidation decarburization and reduction roasting process is used for material drying, concentrate drying and steam generation, heat energy consumption is reduced, and efficient utilization of the combustion heat value is achieved.

The present invention relates particularly to a method for operating and / or decarbonizing industrial production processes, preferably coating processes such as zinc plating, wherein a heated molten material is provided and / or kept available, the molten material is selectively heated by at least one electric heating device and / or at least one non-electric heating device, and where there is surplus power in the power grid, at least a portion of it is taken from the power grid and used to operate the electric heating device.

This invention provides a method and apparatus for circulating hot air through a main pipe in gravel production. The method includes feeding coal gangue with a particle size of 20-80mm into the ignition section of a decarbonization combustion device, and sequentially passing through a first self-ignition stage, a second self-ignition stage, a homogenization stage, a first cooling stage, and a second cooling stage before exiting the decarbonization combustion device. Simultaneously, high-temperature hot air from the first cooling stage is fed into a high-temperature main pipe; low-temperature hot air from the second cooling stage is fed into a low-temperature main pipe; the low-temperature hot air in the first branch pipe mixes with the high-temperature hot air and enters the homogenization stage; the low-temperature hot air in the second branch pipe mixes with the high-temperature hot air and enters the second self-ignition stage; the low-temperature hot air in the third branch pipe mixes with the high-temperature hot air and enters the first self-ignition stage; and the low-temperature hot air in the fourth branch pipe directly enters the ignition stage. The flue gas generated in the ignition stage, the first self-ignition stage, the second self-ignition stage, and the homogenization stage is then led out of the decarbonization combustion device. This invention achieves adjustable flue gas temperature range during the combustion stage, as well as stable combustion and temperature control during the combustion process.

The utility model relates to the technical field of silicon steel production, and particularly discloses an alkali wash liquor heating device for heating by using annealing tail gas, which comprises a tail gas collecting pipeline, a heating device, a heating device and a heating device, and is characterized in that one end of the tail gas collecting pipeline is communicated with a waste gas exhaust pipeline of a continuous decarburization annealing furnace; the combustion assembly is connected with the other end of the tail gas collecting pipeline and used for combusting tail gas; the high-temperature end of the first heat exchanger is connected with the output end of the combustion assembly; a liquid heat transfer medium flowing circularly is arranged in the fluid circulation assembly, the fluid circulation assembly is provided with a first heat exchange section and a second heat exchange section, and the first heat exchange section is configured to be the low-temperature end of the first heat exchanger; the second heat exchange section is configured as a high-temperature end of the second heat exchanger; the alkali wash solution supply assembly is connected with the low-temperature end of the second heat exchanger; the device can effectively recover the heat released by the combustion of the atmosphere in the furnace at the outlet of the smoke exhaust pipeline at the decarburization annealing stage, and is used for heating the alkali wash liquor in the previous alkali wash process, thereby reducing the energy consumption of heating the alkali wash liquor, reducing the direct emission of the tail gas heat and greatly improving the energy utilization efficiency.

The utility model provides a natural gas decarburization system, which comprises an absorption tower with a gas inlet at the lower part, a liquid inlet at the upper part, a gas outlet at the top and a liquid outlet at the bottom; the gas inlet is used for receiving raw material gas, the liquid inlet is used for receiving alcohol amine liquid, the raw material gas is arranged from bottom to top in the absorption tower, the alcohol amine liquid is arranged from top to bottom in the absorption tower, the liquid outlet is used for outputting rich liquid, and the gas outlet is used for outputting purified gas outwards; the cooler is arranged at the upper part in the absorption tower and is positioned below the gas outlet; the upper part of the regeneration tower is provided with a liquid inlet communicated with the liquid outlet to receive rich liquid, the bottom of the regeneration tower is communicated with the liquid inlet, and the top of the regeneration tower is provided with a gas output port for outputting carbon dioxide; the reboiler is arranged at the lower part in the regeneration tower and is used for heating liquid in the regeneration tower to release carbon dioxide and obtain barren liquor; and the condenser is arranged at the upper part in the regeneration tower and is positioned below the gas output port so as to reduce the temperature of the carbon dioxide gas.

The present application relates to the field of gear manufacturing equipment, specifically is a kind of large gear heat treatment equipment, including fixture tooling, fixture tooling left side is provided with vertical, transverse moving load block by track drive assembly, load block right side lower part is fixedly installed with support plate, the processing equipment further includes the induction unit of different specifications gear slot by quick release replacement and adaptive compensation combined mode, and the decarburization unit for scraping off carbon, the present application adopts the way of quick release replacement induction block to adapt to different specifications gear slot heating, and two induction blocks are driven by connecting assembly to realize micro distance adjustment, so that the working surface of induction block always maintains constant spacing with gear slot side, guaranteeing quenching layer depth and uniformity, during the induction block movement heating process, the tooth slot side is cleaned in real time by scraping spring piece, effectively maintain the stability of working surface and gear slot gap, further improve the heat transfer performance.

The application provides a SiMn spring steel without a full decarburization layer and a manufacturing method thereof, and the manufacturing method comprises the following steps: blank loading, heating treatment, dephosphorization treatment and rolling treatment; the heating treatment comprises a preheating section, a first heating section, a second heating section and a soaking section; the temperature of the preheating section is 600-800 DEG C; the temperature of the first heating section is 1000-1100 DEG C; the temperature of the second heating section is 1050-1200 DEG C; and the temperature of the soaking section is 1150-1250 DEG C. The SiMn spring steel prepared by the manufacturing method has a full decarburization layer thickness of 0, a total decarburization layer thickness meeting the requirement of GB standard, and a yield rate of greater than or equal to 95%.

The invention discloses an oil field associated gas decarburization system and decarburization method, and belongs to the technical field of carbon dioxide trapping, the oil field associated gas decarburization system comprises an absorption section and an expansion section, the absorption section comprises a first compressor and an absorption tower, and the first compressor pressurizes process gas; the first compressor and the absorption tower are sequentially arranged in the flowing direction of process gas; the expansion section comprises an expansion machine, the expansion machine can recycle pressure energy generated by the expansion machine and supply energy to the first compressor, and the absorption tower and the expansion machine are sequentially arranged in the flowing direction of the process gas; the first compressor and the expansion machine are an integrated device; the expansion working section is used for reducing pressure of light hydrocarbon and doing work through expansion, and pressure energy can be recycled to supply energy to the first compressor; according to the embodiment, the expansion machine is used for recycling pressure energy of high-pressure light hydrocarbon and converting the pressure energy into mechanical energy, energy is directly supplied to the first compressor in the integrated equipment, and the problem of pressure energy waste caused by pressure relief of the light hydrocarbon in a traditional oil field associated gas decarburization system is solved.

The application discloses a magnet material, a preparation method thereof and a samarium-cobalt magnet material. The preparation method of the magnet material comprises the following steps: hydrogen absorption, airflow grinding, press forming, hydrogen blowing, dehydrogenation and decarburization reaction and sintering of an alloy sheet; a compact is obtained after the press forming; hydrogen is contained in an atmosphere for the airflow grinding treatment; when the hydrogen blowing treatment is performed, the mass ratio of the compact to hydrogen is 10:(0.5-1), and the hydrogen flow is 0.05-0.2 kg / h; the dehydrogenation and decarburization reaction is performed under the condition that the temperature is continuously raised to T, and T is 580-720 DEG C; the continuous temperature rising comprises a first stage and a second stage; the first stage is that the temperature is raised from T0 to T1, and T1 is 400-500 DEG C; the second stage is that the temperature is raised from T1 to T. The carbon content of the magnet material prepared by the application is 50-300 ppm, and the magnet material can further improve the coercive force while maintaining a high remanence.

This invention provides a multi-metal co-doped WC-Co coating and its preparation method, belonging to the field of metal-ceramic coating technology. The preparation method includes: weighing tungsten, yttrium, cerium, chromium, and vanadium sources, mixing and dissolving them in deionized water, adjusting the pH to 3-4, and obtaining a precursor through co-precipitation, washing, and drying; subjecting the precursor to sequential aerobic calcination, hydrogen reduction, and carbonization treatments to generate a WC phase, resulting in a rare-earth-transition multi-metal co-doped WC-based composite material; using the WC-based composite material, cobalt powder, and additives as raw materials, spraying the raw materials onto the substrate surface via thermal spraying to form a multi-metal co-doped WC-Co coating. The WC-Co coating prepared by this invention incorporates four elements—yttrium, cerium, chromium, and vanadium—forming a multiple synergistic mechanism of grain refinement, interface strengthening, and decarburization inhibition, effectively improving the hardness, wear resistance, corrosion resistance, and toughness of the WC-Co coating.

This invention discloses a high-purity 316L stainless steel for semiconductor manufacturing equipment and its production method. It belongs to the field of iron and steel metallurgy technology. This invention employs a process route of molten iron pretreatment + converter roughing + VOD vacuum refining + LF refining + ingot casting + vacuum consumable archive refining (VAR) single vacuum process. Through source impurity control, deep decarburization and deoxidation, precise temperature control, optimized solidification, and single vacuum refining, ultra-low oxygen, hydrogen, and sulfur content and trace inclusions in the steel are achieved. The prepared stainless steel fully meets the stringent requirements of semiconductor equipment. This invention features a simple process flow, low manufacturing cost, and high industrialization feasibility, enabling domestic substitution and enhancing the self-reliance and controllability of the semiconductor industry chain.

The invention relates to the technical field of blast furnace ironmaking, and particularly discloses an energy efficiency improvement and cost control method for a hydrogen-rich carbon circulating oxygen blast furnace system. Aiming at the problems of high decarburization energy consumption, insufficient equipment operation efficiency and high maintenance cost of the existing HyCROF system, five core measures of low-grade waste heat gradient utilization, regeneration gas cooling system transformation, decarburization compressor efficiency optimization, amine liquid system intelligent management and control and cost closed-loop early warning are cooperatively implemented; the system energy consumption is obviously reduced, and the operation cost is accurately controlled. According to the method, the cost of molten iron can be reduced by 40-50 yuan / ton, the cost difference between the method and a traditional blast furnace is greatly reduced, meanwhile, the system operation stability and the resource recycling rate are improved, key support is provided for commercialized popularization of the HyCROF technology, and the method is suitable for hydrogen-rich carbon circulating oxygen blast furnace systems of various scales.

The present application relates to the technical field of metal pressure processing, and discloses a wide-range shared flat steel continuous rolling groove process, a set of flat steel groove can produce most of the flat steel specifications, and the roller does not need to be replaced during the replacement of the flat steel specifications, and only the roll gap needs to be adjusted to realize the replacement of the specifications, so that the number of occupied rolling mills is greatly reduced, the wide-range shared flat steel continuous rolling groove process realizes the quick replacement of the specifications, is particularly favorable for the production of spring flat steel, reduces the performance decline or even the total decarburization phenomenon caused by the increase of the decarburization layer depth due to the prolonged time in the furnace caused by the replacement of the specifications, and is favorable for the stability of the performance of the spring flat steel, the wide-range shared flat steel continuous rolling groove process realizes the quick replacement between the specifications, is very suitable for the production organization of small batches and multiple specifications of the flat steel, can flexibly arrange the production specifications, and meets the production requirements of small batch orders.

This invention discloses a medium carbon steel for steering screws in new energy vehicles and its production method. The chemical composition of the medium carbon steel, by mass percentage, is as follows: C: 0.45%~0.70%, Si: 0.25%~0.55%, Mn: 0.45%~1.05%, Cr: ≤0.40%, Mo≤0.40%, Ni≤0.40%, P≤0.035%, S: 0.015%~0.035%, O≤0.0012%, with the balance being Fe and unavoidable impurities. The production method includes a complete process: molten iron pretreatment – ​​converter smelting – LF refining – RH furnace vacuum degassing – continuous casting – rolling – quenching and tempering – finishing – sub-critical quenching – low-temperature tempering. By controlling the composition to reduce the addition of expensive alloying elements, and through a composite heat treatment of "quenching and tempering + sub-critical quenching + low-temperature tempering," a hardness gradient of ≥60HRC on the surface and 22~28HRC in the core is achieved, with no decarburized layer on the surface. Simultaneously, strict control of non-metallic inclusions enhances the purity of the steel. This invention's product is compatible with cyclone milling processes, exhibits minimal quenching deformation, and can be straightened, meeting the high precision and long service life requirements of steering screws in new energy vehicles.

The invention discloses a method for inhibiting decarburization of 30CrMnSiA alloy steel with assistance of ethanol, which is used for inhibiting formation of a decarburization layer on the surface of the 30CrMnSiA alloy steel by strictly controlling heat treatment parameters and adopting mixed gas as a protective atmosphere. According to the method, the decarburization phenomenon of the 30CrMnSiA alloy steel can be efficiently prevented by accurately adjusting the components of the protective gas in the furnace and strictly controlling heat treatment parameters, meanwhile, the method is low in production cost, easy and convenient to operate and high in production efficiency, can meet the requirements of the modern industry for rapid and large-scale production, and has important engineering significance.

This invention discloses a method for processing shale gas, relating to the field of natural gas development and processing technology. The method includes using a three-phase separator to separate cooled raw shale gas to obtain a gas phase; using an absorbent to decarbonize the reheated gas phase of the raw shale gas in a deacidification unit; selecting a dehydration unit comprising three adsorption towers, each containing an adsorbent; injecting the decarbonized raw shale gas phase into any one of the adsorption towers for dehydration; introducing regenerated gas into any one of the remaining two adsorption towers, allowing heat from that tower to enter the regenerated gas; subsequently heating the regenerated gas; and injecting the heated regenerated gas into the last adsorption tower for desorption of the adsorbent in that tower, thereby obtaining purified natural gas. This method reduces energy consumption in the dehydration step of shale gas post-processing.

The invention belongs to the technical field of wastewater and waste gas treatment, and discloses a method and a device for resource preparation of a sulfur autotrophic denitrification filler, and a nitrate-nitrogen-containing wastewater treatment method, the method comprises the following steps: S1, coal gas purification: preparing red mud slag into red mud slurry, and inputting the red mud slurry into a desulfurization and decarbonization unit to desulfurize and decarbonize coal gas; s2, material separation: carrying out solid-liquid separation on the used red mud slurry, drying the obtained solid, enabling the liquid to enter a freezing crystallization unit to obtain a crystallized solid phase and a concentrated liquid phase, and mixing the concentrated liquid phase with the used red mud slurry; and S3, filler preparation: preparing the dried solid into a carrier, and then mixing and loading the carrier with the crystallized solid phase to prepare the sulfur autotrophic denitrification filler. According to the method, resource utilization of hazardous waste can be achieved, the wastewater treatment cost is reduced, and the obtained filler can stably treat wastewater.

This invention belongs to the field of iron and steel smelting technology, and relates to a method for controlling the oxygen content in the production of aluminum-containing non-oriented silicon steel using twin-roll casting. The chemical composition of the aluminum-containing non-oriented silicon steel, by mass percentage, is: C≤0.0025%, Si: 2.0~2.9%, Mn: 0.45~0.55%, P≤0.03%, S≤0.0025%, Al: 0.65~0.75%, with the remainder being Fe and unavoidable impurities. The process flow adopted in this invention is: KR hot metal pretreatment → converter smelting → LF refining → RH vacuum refining → twin-roll casting. The above-mentioned process and method of this invention solves the problem of excessively high oxygen content in molten steel during the LF process, ensuring that the oxygen content of the molten steel after RH decarburization is controlled within a reasonable range.

The application belongs to the technical field of oriented silicon steel production and discloses an annealing method for improving the surface quality of oriented silicon steel, which comprises the following steps: decarburization annealing, nitriding annealing, high-temperature annealing and tensile flattening annealing, wherein the decarburization annealing section is divided into three sections according to the furnace length, the protective gas is non-uniformly introduced through segmented regulation and control, and a group of detection points are arranged in the furnace, so that the water-hydrogen partial pressure ratio of any detection point in the furnace satisfies the formula: 0.096i-0.00353i 2 +0.02651≤P i ≤0.099i-0.00396i 2 +0.3, wherein i represents the number of the detection point, P i represents the water-hydrogen partial pressure ratio measured by the detection point i. According to the application, the water-hydrogen partial pressure ratio of different parts in the furnace during the decarburization annealing process is regulated and controlled to be distributed according to a specific rule, so that a suitable oxidation layer structure is formed, thereby reducing the generation of surface defects such as water marks and crystal dew on the surface of the finished oriented silicon steel.

The application discloses a kind of without heating regeneration carbon dioxide normal temperature removal process and system, belong to natural gas decarburization field;A kind of without heating regeneration carbon dioxide normal temperature removal process, comprising the following steps:S1, raw material gas pretreatment;S2, CO2 absorption;S3, rich liquid flash evaporation;S4, lean liquid regeneration;S5, material circulation;The application is effectively solved by the absorption part of being set, the pain point that edge filler reaction is not sufficient, the low life of central filler;Can shake and scatter adhesion filler ball, clean filter hole impurity, avoid filter hole blockage, further improve gas-liquid mass transfer efficiency;Can buffer knock impact force, prevent that filler plate is damaged;Can effectively protect electric telescopic rod, and maintenance is convenient, need not to disassemble whole tower body, shorten maintenance cycle, guarantee production continuity;Can avoid liquid flooding, channeling phenomenon.

The application discloses a smelting method of high-titanium high-sulfur stainless steel, which comprises the following steps: step a, adding scrap steel and / or the same steel return material into an electric furnace according to target component requirements for smelting, wherein the molten steel after smelting contains C: 1%-2%, Si: ≤0.70%, Mn: ≤0.7%, P: ≤0.035%, S: ≤0.050% and Cr: 17%-18%, and the smelting temperature is 1600-1650 DEG C, thereby obtaining A product; step b, tapping the A product into an AOD furnace, sequentially experiencing a pretreatment period, a decarburization period, a pre-reduction period and a reduction period, thereby obtaining B product; step c, transferring the B product to an LF furnace, electrically heating and slagging, then using lime to slag and adjust the slag, sampling and analyzing the molten steel components, and supplementing the components, thereby obtaining C product; and step d, casting the C product, and obtaining the finished product after cooling. The application has the advantages that the molten steel can be stably controlled under the conditions of high-alkalinity slag deoxidization and desulfurization, and the high-titanium high-sulfur components are improved, thereby improving the qualified rate of smelting.

The present invention relates to a process for the decarbonation of limestone, dolomite or other carbonated materials, said process comprising calcining particles of carbonated materials (6) in a reactor (8) of a first circuit (2) up to a temperature range in which carbon dioxide contained in the particles of carbonated materials (6) is released to obtain particles of decarbonated materials (16) and setting the dioxygen content supplied to the reactor (8) such that a first gas (14) exiting the reactor (8) and circulating in the first circuit (2), comprises at least 40% of CO2 by volume on a dry basis and less than 60% of CO2 by volume on a dry basis, while operating the reactor (8) under nominal condition, in particular non-starting condition.

The utility model relates to the technical field of natural gas purification, in particular to a low-energy-consumption natural gas decarburization device which comprises a decarburization treatment tank, a top cover is arranged at the top of the decarburization treatment tank, an absorption tower, a heating machine and a desorption machine are sequentially arranged in the decarburization treatment tank, and a liquid outlet pipe is arranged at the bottom of the absorption tower. A spiral heating pipe is arranged in the heating machine, a rich liquid distributor is arranged in the desorption machine, a liquid inlet pipe is arranged on one side of the top of the rich liquid distributor, a rotary spraying mechanism is arranged in the absorption tower, a driving mechanism is arranged on one side of the rotary spraying mechanism, the rotary spraying mechanism comprises a ring piece, a rotating pipe is arranged on the inner side of the ring piece, and a driving mechanism is arranged on one side of the rotating pipe. A fluted disc is arranged on the outer side of the rotating pipe, a supporting ring is arranged below the fluted disc, the two sides of the lower end of the rotating pipe communicate with flow dividing pipes, and a plurality of spraying heads are arranged at the bottoms of the flow dividing pipes at equal intervals; through cooperation of the structure, the purpose of efficiently removing carbon dioxide in natural gas is achieved.