1454results about "Manufacturing converters" patented technology

Provided are a joint regulation method of material flow, energy flow, and carbon emission flow in a long-process steel enterprise, which belongs to a field of intelligent regulation and control technology of electric power system in the steel industry. The method includes: coupling a material-energy characteristic model of each production process of a steel enterprise and a carbon emission model of the steel enterprise, constructing a material flow-energy flow-carbon emission flow coupling model of the long-process steel enterprise, establishing an objective function using a minimize sum of an electricity purchase cost from a superior grid, a park carbon emission cost, and a production raw material cost as an object, and solving and obtaining an optimal operation mode of a joint regulation of the material flow-energy flow-carbon emission flow in the steel enterprise.

The invention relates to the technical field of high-strength steel production, in particular to 780MPa-grade forming-enhanced cold-rolled dual-phase steel and a preparation method thereof.The 780MPa-grade forming-enhanced cold-rolled dual-phase steel comprises the chemical components of 0.09%-0.11% of C, 0.25%-0.45% of Si, 1.9%-2.1% of Mn, smaller than or equal to 0.012% of P, smaller than or equal to 0.006% of S, 0.03%-0.05% of Als, smaller than or equal to 0.005% of N, 0.25%-0.35% of Cr, 0.015%-0.025% of Nb, 0.08%-0.12% of Cu and 0.05%-0.09% of Ni, and the ratio of Nb to Cr is 1: 10-1: 12; ceq is equal to 0.38%-0.42%, and the balance is Fe and impurities; the core objective of the invention is to enable the work hardening index n value to be greater than or equal to 0.24 through component collaborative optimization and process precise regulation and control, so that the industrial pain points of insufficient reaming performance and poor formability of the existing 780MPa-grade cold-rolled dual-phase steel are fundamentally solved, and meanwhile, the alloy cost is reduced, and the manufacturability is improved.

The invention relates to the technical field of ferrous metallurgy, and discloses a converter endpoint carbon content and temperature online prediction method based on multi-modal data. The method comprises the following steps: collecting visual image data, flame spectrum data and blowing process parameter data of furnace mouth flames in the blowing process of a converter to form multi-modal data; accurately positioning and segmenting a flame region by using a target detection and segmentation model, and extracting visual features and spectral features corresponding to the space according to the flame region; the visual features, the spectral features and the process parameters are fused and preprocessed and then input into a pre-trained symbol regression prediction model, and an end point carbon content prediction value and an end point temperature prediction value are obtained; on-line operation guidance information for adjusting the process parameters is generated based on the deviation between the predicted value and the target value and the input parameter sensitivity. According to the method, the end point prediction precision and interpretability are improved, the online control requirement of the converter is met, the end point double hit rate of the converter is effectively improved, and a closed loop from intelligent prediction to intelligent control is achieved.

The present application relates to the technical field of metallurgy, and particularly relates to a production method of a large-wall-thickness pipeline steel with improved carbon dioxide corrosion resistance and strength and toughness, and specific measures include: (1) controlling the bottom blowing mode and end point requirement in the converter process; (2) controlling the tapping time and replacing the tapping hole opportunity in the tapping process; (3) feeding the CAS aluminum wire and controlling the CAS argon blowing time; (4) controlling the top slag addition amount, heating time and outgoing mode in the LF refining process; (5) controlling the wire feeding parameters, soft blowing time and outgoing requirement of RH in the RH refining process; (6) controlling the precision requirement, casting speed fluctuation and crystallizer liquid level fluctuation of the continuous casting equipment in the continuous casting process to obtain the casting blank. Through controlling the parameters of each process in the smelting and rolling process, the present application realizes the whole-process steel cleanliness control and ladle grain refinement, and further improves the strength, low-temperature toughness, HIC resistance and carbon dioxide corrosion resistance of the large-wall-thickness pipeline steel.

The invention discloses a steelmaking converter carbon brick masonry hoisting device and a use method thereof.The steelmaking converter carbon brick masonry hoisting device cooperates with a steelmaking converter body and a steelmaking converter workshop oxygen lance replacement electric hoist for operation, and comprises a lifting unit, a conveying unit, a construction platform unit and a transportation trolley; the auxiliary function assembly is integrated on all the units to achieve precise limiting, safety protection and automatic control, and the lifting unit is specifically arranged on the outer side area, corresponding to a furnace body gate, of a steelmaking converter platform. The U-shaped limiting assembly is arranged at the top of the lifting unit, the first positioning baffle and the second positioning baffle define the U-shaped groove matched with the transport trolley in width, the length difference value of the first positioning baffle and the second positioning baffle is consistent with the height of the transport trolley, the upper portion and the lower portion of the trolley can be limited, and deviation in the transfer process is avoided; the first buffering protection pad and the second buffering protection pad arranged on the U-shaped limiting assembly can effectively absorb impact force generated when the trolley makes contact with the baffle, and structural deformation and carbon brick collision damage are prevented.

The invention discloses an application method of a data model in prediction of converter steelmaking static oxygen supply. The method comprises the following steps: S1, steelmaking converter whole-process data preprocessing; s2, making a data model; s3, deploying the data model online; and S4, the converter L2 process control online system calls the data model online. A data set covering the whole converter steelmaking process is manufactured, a data model is trained on the basis of the data set, the trained data model is deployed on a reasoning server in a containerization mode, a converter L2 system transmits heat characteristic data through an API interface, then an oxygen amount calculation model is remotely called, and on the basis of achieving static oxygen supply amount prediction, the oxygen supply amount of the converter is predicted. And the purpose of improving the prediction precision is achieved.

The invention discloses an efficient and low-cost high-strength steel plate for a 1300MPa-grade low-temperature engineering structure and a manufacturing method of the high-strength steel plate, and belongs to the technical field of low-carbon microalloyed steel production. Optimized steelmaking, heating, rolling, pre-straightening, relaxation, controlled cooling, hot straightening and tempering processes are adopted, an ultra-fast cooling and laminar cooling mode is adopted for controlled cooling, chemical components of the steel plate contain Ce, and finally the problems that the 1300MPa-level hot-rolled steel plate with the thickness of 10-50 mm produced through an online cooling process is low in toughness, high in yield ratio, low in flaw detection qualification rate and uneven in plate shape are solved.

The utility model relates to a converter mouth purging device in the converter tapping process, and belongs to the technical field of converter steelmaking in the metallurgical industry. According to the technical scheme, one end of a large rotating arm (4) is rotationally connected to a stand column (1) through a rotating body and a rotating body support, the other end of the large rotating arm (4) is rotationally connected with one end of a small rotating arm (13) through the rotating body and the rotating body support, a universal support (11) is rotationally connected to the other end of the small rotating arm (13) through the rotating body, a positioning sleeve (10) is arranged on the universal support (11), and the positioning sleeve (10) is connected with the stand column (1). The stainless steel purging pipe (7) penetrates through the positioning sleeve (10), one end of the stainless steel purging pipe (7) is connected with the nozzle (5), the other end of the stainless steel purging pipe (7) is connected with the elbow (14) and the control handle (15), and the elbow (14) is connected with the metal hose (16) through the quick connector (17). The device has the beneficial effects that bonded slag or steel at the converter mouth can be automatically, safely and efficiently cleaned, and the normal operation of the converter is ensured.

The invention discloses wear-corrosion-resistant high-strength steel for a power transmission tower and a preparation method thereof, and belongs to the technical field of metal materials. The wear-corrosion-resistant high-strength steel for the power transmission tower provided by the invention has good corrosion resistance and wear resistance, has excellent wear resistance in a soil environment of sulfate ions with the concentration of 300 mg / kg-50000 mg / kg and chloride ions with the concentration of 500 mg / kg-10000 mg / kg, and meets various environmental performance requirements of an acid soil environment, an atmospheric corrosion environment and the like. In an acid soil environment, the corrosion resistance is more than 8 times that of plain carbon steel, and the relative corrosion rate is lower than 10%; compared with Q355B, the corrosion rate of atmospheric corrosion resistance is lower than 40%, and the abrasive wear rate is 26.5%-28.0%; and through reasonable matching of corrosion-resistant elements, the requirements of corrosion resistance in various environments are met. The yield strength is 775 MPa-805 MPa, the tensile strength is 952 MPa-985 MPa, the percentage elongation after fracture A50 is larger than or equal to 28%, the low-temperature impact toughness at the temperature of-60 DEG C is larger than or equal to 260 J, meanwhile, the forming performance is excellent, and the 180-degree cold bending requirements that d is equal to 1.0 a are met.

The invention discloses a rare earth high-performance EH40 marine steel plate and a production method thereof. The rare earth high-performance EH40 marine steel plate provided by the invention comprises the following chemical components in percentage by mass: 0.06 to 0.09 percent of C, 0.20 to 0.30 percent of Si, 1.45 to 1.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, 0.035 to 0.050 percent of Nb, 0.035 to 0.050 percent of V, 0.012 to 0.022 percent of Ti, 0.020 to 0.035 percent of Als, 0.0005 to 0.0020 percent of rare earth Ce, less than or equal to 0.40 percent of CEV, less than or equal to 0.20 percent of Pcm and the balance of Fe and inevitable impurities. The performance meets the requirements that the yield strength is larger than or equal to 390 MPa, the tensile strength is 510-660 MPa, the percentage elongation after fracture is larger than or equal to 20%, and the impact energy at the temperature of minus 40 DEG C is larger than or equal to 270

The invention belongs to the technical field of steelmaking, and relates to a method for controlling large-size inclusions in silicon-aluminum deoxidized steel. Converter tapping adopts a silicon-aluminum deoxidation process, after tapping, high-oxidability slag is removed by adopting a slagging-off process, and then high-reducibility premelting refining slag is added for re-slagging, so that the slag (TFe + MnO) at most of the refining moments is maintained within 0.50%; in the refining process, the stirring strength is controlled to control the desulfurization rate of the refining slag within 50%, so that the slag entrapment degree of the refining slag is reduced to the maximum extent; two iron sheets with the thickness being 2 mm are placed on the liquid level of the slag in advance before RH vacuum treatment, it is guaranteed that the slag is prevented from being drawn into the dip pipe in the process that the dip pipe is inserted into the molten steel, soft blowing is conducted for 10-15 min after RH vacuum treatment, then argon is closed, and the molten steel is subjected to standing for 20-30 min. By the adoption of the smelting process, the product rejection rate caused by large-size inclusions is reduced to be within 2%.

The invention relates to the technical field of research and development of low-temperature bolt steel, and discloses a low-temperature impact performance control process for low-temperature bolt steel. Comprising the steps that S1, in the steelmaking refining stage, purity and uniformity control is conducted, S2, casting blank homogenization treatment is conducted, stress relief and structure regulation are conducted, S3, a heat treatment core process is conducted, structure and toughness balance regulation is conducted, and S4, online detection and dynamic feedback are conducted, and performance stability is guaranteed. By accurately controlling the element proportion of carbon (C), silicon (Si), manganese (Mn), chromium (Cr) and molybdenum (Mo) in steel and combining with an optimized heat treatment process (such as 860 DEG C oil quenching and 640-650 DEG C high-temperature tempering, and the heat preservation time is prolonged to 120 minutes or more), the V-shaped notch impact energy of the material in the environment of-101 DEG C stably reaches 35 J or more, the impact energy of part of samples can reach 50 J or more, and the impact energy of the part of samples can reach 50 J or more. The problem that the low-temperature impact performance is insufficient after wire hardening and tempering is thoroughly solved, and it is ensured that the brittle failure resistance of the bolt is remarkably improved in the ultralow-temperature environment.

The invention discloses a refining calcium-free treatment process, and belongs to the technical field of refining and smelting of high-carbon aluminum-containing steel. According to the method, various smelting parameters of the whole steelmaking process are adjusted, sulfur entering a converter is guaranteed in a desulfurization area, tapping carbon, tapping temperature, in-place refining component hit rate, deoxidation degree and tapping phosphorus difference are guaranteed in a converter area, refining treatment time, white slag protection time and soft blowing time are guaranteed in a refining area, the content of Al2O3 in molten steel is reduced, the purity of the molten steel is guaranteed, and the quality of the molten steel is improved. Molten steel calcium-free treatment is achieved, and the quality of molten steel is improved.

The application discloses a high-phosphorus molten iron extremely-low-sulfur and low-phosphorus hydrogen-doped pipeline steel steelmaking process control method, which reduces the burden of LF desulfurization through post-furnace slag system treatment, effectively improves the refining rate, improves the production efficiency and guarantees continuous casting through over-treatment or re-treatment of LF refining; compared with conventional production, the desulfurization efficiency is improved through converter slag system and LF refining slagging process, the cleanliness of the steel is also greatly improved, and the final total oxygen content can be stably controlled within 0.0015%. The application aims to provide a steelmaking process control method for realizing low-phosphorus and extremely-low-sulfur chemical composition in the process of smelting hydrogen-doped pipeline steel from high-phosphorus molten iron, especially for smelting low-phosphorus steel and extremely-low-sulfur steel from high-phosphorus molten iron, the cleanliness of the steel is also greatly improved, and the final total oxygen content can be stably controlled within 0.0015%.

The invention relates to the technical field of guide arm spring flat steel, and discloses a guide arm spring flat steel surface crack control technological method.The guide arm spring flat steel surface crack control technological method comprises the following technological methods of S1, smelting technology optimization, S2, continuous casting technology control, S3, rolling technology optimization and S4, quality detection and feedback adjustment. In the smelting stage, through slag stopping and tapping, LF furnace long-time refining white slag making (the alkalinity is 5.0-7.0, and the white slag retention time is longer than or equal to 30 min) and vacuum deep degassing (the vacuum degree is smaller than or equal to 67 Pa, and the retention time is longer than or equal to 15 min), the content of gas (the hydrogen content is smaller than or equal to 1.5 ppm) and the content of inclusions in steel are remarkably reduced, component fluctuation in the later period is avoided through accurate use of a diffusion deoxidizing agent (the use amount is larger than or equal to 80 kg / furnace), a pure molten steel foundation is laid for the follow-up process, and the production cost is reduced. And crack inducements caused by inclusion and gas are reduced from the source.

The invention relates to a production method of nitrogen-containing low-carbon aluminum killed molten steel. The method comprises the following steps: 1) smelting by adopting a top-bottom combined blown converter; (2) the converter smelting process is controlled; (3) controlling the smelting end point of the converter; (4) controlling molten steel sedation; (5) controlling tapping of the converter; and (6) refining of a molten steel argon blowing station is controlled, the molten steel fed with the aluminum wire is subjected to weak stirring, the argon flow is controlled to be 50-100 L / min, the molten steel is subjected to weak stirring for 6-8 min, finished molten steel is obtained, and the finished molten steel comprises, by weight, 0.02%-0.045% of C, smaller than or equal to 0.034% of Si, 0.2%-0.3% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.012% of S, 0.025%-0.06% of Al, 0.0035%-0.0065% of N, smaller than or equal to 0.0035% of T [O] and the balance Fe and residual elements. According to the method, the problem of accurate nitrogen increasing in converter smelting of the low-carbon aluminum killed molten steel is solved, the cleanliness of the molten steel is improved, the argon blowing direct feeding process of the nitrogen-containing low-carbon aluminum killed molten steel is achieved, and the smelting cost is reduced.

The invention relates to the technical field of smelting element prediction, and discloses an intelligent prediction method and system for the content of residual elements at the smelting end point of a converter. The method comprises the steps that first smelting data and second smelting data are integrated based on heat information, and a historical sample set is generated; screening out sample data belonging to a first threshold interval from the sub-sample set, and combining all the sample data into a standard sample set; key parameters are extracted from the standard sample set, the first content of the converter end point residual elements is calculated based on the initial content and the yield, a label value is set for the standard sample set based on the first content, and a label sample set is generated; summarizing all label sample sets based on the heat information, generating a training data set, constructing a converter end point residual element prediction model based on the training data set, predicting and outputting the residual element content in converter end point molten steel, and adjusting the production process based on the residual element content. According to the method, the residual element content prediction efficiency and precision are improved.

The present application belongs to the field of smelting coal gas recovery, and particularly relates to an optimized control method and system for combustible gas recovery. The method divides the smelting process into N measurement time periods, and calculates the average secondary combustion coefficient of each time period in real time. Meanwhile, M target smelting time zones and their weights are set, and a dynamic target value sequence is established. Based on the initial fan speed, the measured coefficient is adjusted through multiple iterations of the furnace, and when the measured coefficient is greater than the target value, the speed is reduced in steps, and a thermal imager and a differential pressure instrument are introduced to monitor the smoke emission. A smoke emission rate statistics and tolerance threshold judgment mechanism is established to trigger speed backtracking adjustment, and finally the average secondary combustion coefficient of each time period is minimized to generate an optimal fan speed model. The present application maximizes the improvement of the calorific value of coal gas and the recovery of carbon monoxide under the premise of preventing smoke from the furnace mouth.

The utility model relates to a waste heat boiler and a converter gas waste heat recovery system equipped with the waste heat boiler, the waste heat boiler comprises a first return stroke boiler, a second return stroke boiler and a settling chamber, the top of the first return stroke boiler is provided with a flue gas inlet, and the top of the second return stroke boiler is provided with a flue gas outlet. A bottom smoke outlet of the first return stroke boiler and a bottom smoke inlet of the second return stroke boiler are both communicated with an inner cavity of the settling chamber, and a longitudinal scouring heating surface is arranged in the first return stroke boiler. The waste heat boiler adopts a double-return-stroke structural design, so that the waste heat recovery effect can be ensured; a longitudinal scouring heating surface and a smoke longitudinal scouring heating surface are arranged in the first return stroke boiler, so that the smoke waste heat is recycled, the ash deposition degree can be effectively relieved, and the ash deposition condition is reduced; and the settling chamber can play a role in inertial dust removal, so that the probability of ash deposition and ash blockage of the waste heat boiler is further reduced.

The invention discloses a production method of a high-yield 1000MPa-grade ultrahigh-strength galvanized dual-phase steel strip. The production method comprises a smelting-continuous casting process, a hot rolling process, an acid pickling and cold rolling process, a continuous hot galvanizing process and a finishing process. The steel comprises the following chemical components in percentage by mass: 0.11%-0.15% of C, less than or equal to 0.40% of Si, 2.60%-2.85% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.015%-0.060% of Alt, 0.10%-0.30% of Cr, 0.025%-0.040% of Nb, 0.010%-0.025% of Ti, 0.0008%-0.0020% of Ca, less than or equal to 0.0070% of N and the balance of Fe and impurities. The galvanized dual-phase steel strip which is high in yield, ultrahigh in strength and good in corrosion resistance and meets the characteristic requirements of safety, low energy consumption and light weight in the automobile industry.

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 improving the toughness performance of low-alloy high-strength steel by adding rare earth cerium-iron alloy and application of the method, and belongs to the technical field of steel rolling and product development. According to the method, narrow window control is conducted on converter steelmaking, LF refining and RH vacuum treatment in an existing wide and thick plate low-alloy high-strength toughness steel production technological process, a cerium-iron alloy is added after alloying in the RH vacuum treatment process is finished and circulated, temperature measurement and oxygen determination are conducted before the cerium-iron alloy is added, and the active oxygen is smaller than or equal to 3 ppm. The method is applied to an RH vacuum treatment step of industrial production of wide and thick plate Q690E steel and comprises the following steps: adding a titanium-iron alloy and a ferroboron alloy in sequence for alloying, circulating after alloying is finished, and adding a cerium-iron alloy; and carrying out soft blowing after the RH vacuum treatment is finished. After the rare earth cerium-iron alloy is added, the average size of low-alloy high-strength steel inclusions is remarkably reduced, the average grain size is greatly small, the average width of a martensite lath bundle is narrowed by less than 200nm, and the toughness performance is remarkably improved.

The utility model relates to a converter gas recovery system which comprises a first cooling flue used for being connected with a converter, the first cooling flue is provided with a first gas outlet and a second gas outlet, the first gas outlet is connected with a gas processing mechanism, and the second gas outlet is connected with a gas waste heat recovery mechanism. And valve control units are respectively arranged at the first gas outlet and the second gas outlet. According to the utility model, the converter gas can enter the gas treatment mechanism to be treated and can also enter the gas waste heat recovery mechanism to be treated, so that the process flexibility is high, the treatment effect of the converter gas can be ensured, and the reliability and the safety of converter gas treatment are improved; the coal gas treatment mechanism and the coal gas waste heat recovery mechanism can be standby for each other, and when one mechanism is not used, the other mechanism can be switched for treatment, so that the coal gas treatment mechanism and the coal gas waste heat recovery mechanism are convenient to overhaul and maintain, and the stability of converter steelmaking production is ensured.

The invention discloses a preparation method of low-phosphorus high-strength deep drawing steel. The preparation method comprises the following steps: 1) converter production; 2) RH furnace production; 3) continuous casting production; 4) heating the casting blank; (5) the finish rolling temperature of finish rolling is 890-940 DEG C, and the coiling temperature is 570-600 DEG C; 6) a continuous annealing process; the high-strength deep drawing steel comprises the following chemical components in percentage by weight: less than or equal to 0.0030% of C; s is smaller than or equal to 0.15%; mn < = 0.75%; p is less than or equal to 0.040%; less than or equal to 0.015% of S; al t is greater than or equal to 0.015%; t > = 0.040%; n is less than or equal to 0.0040%, and the balance is Fe and inevitable impurities. By reducing the content of the P element and optimizing the component design and the preparation process, the purpose of improving the formability of the 180 MPa-grade high-strength deep drawing steel is achieved while the mechanical property requirement of the 180 MPa-grade high-strength deep drawing steel is met, and the requirement of the market for high-performance steel is met.

The invention discloses high-manganese steel giving consideration to extremely low-temperature mechanical properties and surface quality and a preparation method of the high-manganese steel. The high-manganese steel comprises the following chemical components in percentage by mass: 0.35%-0.55% of C, 0.11%-0.22% of Si, 22.5%-25.5% of Mn, less than or equal to 0.020% of P, less than or equal to 0.005% of S, 3.0%-4.0% of Cr, 0.03%-0.10% of V, 0.03%-0.10% of Ti, 0.01%-0.10% of Alt, 0.0003%-0.0050% of Ca and the balance of Fe and other inevitable impurities. Through double innovative design of material components and the process, the whole preparation process of high-manganese steel smelting-casting-rolling is penetrated, the surface crack defect caused by element segregation, grain boundary selective oxidation, insufficient local plasticity and the like on the surface of the high-manganese steel plate at present is effectively prevented, and the surface quality is improved.

The invention discloses a production method of low-cost cold-rolled dual-phase steel DP980 with yield strength of 550-760 MPa, which comprises the following steps: (1) smelting and continuous casting: molten steel for a casting machine comprises the following components in percentage by mass: 0.090-0.120% of C, 0.40-0.60% of Si, 2.40-3.00% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 0.015-0.045% of Alt, 0.10-0.30% of Cr, 0.020-0.045% of Nb, 0.015-0.035% of Ti, 0.0008-0.0030% of Ca and 0.0030-0.0070% of N; (2) hot rolling; (3) pickling and cold rolling; and (4) continuous annealing and leveling. The cold-rolled dual-phase steel disclosed by the invention has the characteristics of low yield ratio, high elongation percentage, excellent formability and the like.

The invention belongs to the technical field of converter gas treatment, and relates to a converter high-temperature vaporization flue boiler outlet gas treatment device, which comprises a first conveying pipeline, a second conveying pipeline, a cyclone dust collector and a tempering dust collector, an inlet of the first conveying pipeline is used for being connected with a coal gas outlet of a converter vaporization flue boiler, an outlet of the first conveying pipeline is connected with an inlet of the cyclone dust collector, an inlet of the second conveying pipeline is connected with an outlet of the cyclone dust collector, and an outlet of the second conveying pipeline is connected with an inlet of the tempering dust collector. An outlet of the tempering dust remover is connected with an electrostatic dust remover; the first conveying pipeline is provided with fire extinguishing equipment used for extinguishing sparks in the pipe section, and the second conveying pipeline is provided with at least one fire pipe evaporator arranged in the flowing direction of coal gas. The problem that the fire tube is blocked due to zinc liquid drops, high-temperature molten ash and the like condensed by zinc steam in the coal gas heat and mass recovery process through the fire tube evaporator is solved.

The invention discloses a production method of anti-acid pipeline steel X70MS. The technological process comprises converter smelting, refining, continuous casting, heating rolling, cooling and inspection warehousing, the produced anti-acid pipeline steel has high strength, good toughness, excellent low-temperature toughness, excellent HIC and SSCC resistance and excellent machining performance and welding performance, the yield strength of the steel is 485-560 Mpa, the tensile strength is 580-680 Mpa, the yield ratio is smaller than or equal to 0.88, and the yield ratio is smaller than or equal to 0.88. The plate thickness low-temperature impact toughness Akv is greater than or equal to 230J, the crack-arrest drop hammer temperature is-30 DEG C, the toughness area is greater than or equal to 88%, and the HIC resistance CLR is less than or equal to 5%, CTR is less than or equal to 1%, and CSR is less than or equal to 1%. And the 90% yield strength load SSCC is qualified.

The invention relates to the technical field of spring steel preparation, in particular to a high-strength spring steel wire rod and a preparation method and application thereof. According to the steel wire rod, the content of C, Si, Mn, Cr, Mo, V, Nb and other elements is controlled, the strength and plasticity index SE is limited to be 1.25-1.75%, and meanwhile, the steel wire rod subjected to hot rolling of a continuous casting bloom is subjected to three-section controlled cooling through a Stelmor line, specifically, the steel wire rod is rapidly cooled to 670-710 DEG C at the speed of 4.2-5.5 DEG C / s, then slowly cooled to 620-630 DEG C at the speed of 0.3-0.5 DEG C / s, and finally air-cooled to 530-550 DEG C at the speed of 1.8-2.2 DEG C / s. According to the high-strength spring steel wire rod for the electric tailgate spring, through collaborative design of components and the process, the problem that when the ultrahigh strength of an existing high-strength spring steel wire rod for the electric tailgate spring is achieved, it is difficult to synchronously guarantee excellent structure uniformity, good plasticity and excellent fatigue performance is effectively solved.

The invention discloses a converter three-time dust removal control method and related equipment, and relates to the technical field of steel smelting, the method comprises the following steps: obtaining real-time image data and a current production process stage of a converter mouth area; performing smoke detection processing on the real-time image data to obtain smoke state characteristics; when the smoke state feature meets a first trigger condition and the current production process stage meets a second trigger condition, generating a dust removal control instruction; and the dust removal control instruction is sent to the target tertiary dust removal fan and the valve execution mechanism. Through double judgment of image recognition and the process stage, rapid and accurate dust removal control of converter smoke dust can be achieved, and environmental protection, energy conservation and operation safety are all considered.