350 results about "Steelmaking continuous casting" patented technology

The invention proposes a steelmaking-continuous casting scheduling method utilizing a priority policy hybrid genetic algorithm. The method comprises the following steps: establishing a production scheduling plan target function; establishing a constraint condition set; performing iterative calculation on the target function by utilizing the priority policy hybrid genetic algorithm; and calculating decision variables. The calculation of the decision variables specifically comprises the steps of performing model initialization; calculating a feasible solution: designing a segmented combined real number code composed of casting time information of a continuous casting machine and information of a heat machining device, randomly generating operation time according to a distribution law, and obtaining a time conflict-free scheduling plan by backward inference calculation and conflict elimination methods; and performing population genetic optimization: quantitatively describing a matching relationship among machining devices in reality by using processing weight assignment of a task executable device, and introducing the matching relationship to genetic operation in the form of a device selection priority policy to perform population evolution. The method can solve the problem of uncertainty of device selection and operation time in production to obtain an optimized executable production scheduling plan.

The invention provides a steelmaking-continuous casting production operation plan and a real-time dispatching optimization method and a system based on a mixed intelligent optimization algorithm. The method comprises the following steps: establishing a production operation plan and an original dispatching proposal by the mixed intelligent optimization algorithm according to a production batch plan; detecting the perturbation in the production process through the established real-time data and a human-computer interaction interface; adopting the mixed intelligent optimization algorithm for remaking the plan on operating plans and unoperated plans; classifying the main perturbation in the production process; and establishing processing mechanisms corresponding to each kind of perturbation. The invention provides the re-planning and re-dispatching functions under the condition of changed production environment, and brings convenience for dispatching personnel to regulate the dispatching proposals according to personnel experience. The method considers the possible conflicts between equipment and the furnace sequence during the generation of the production operation plan and the dispatching proposal, so the calculation results are feasible. Because of the real-time dispatching function, the model method has strong system self organization performance, good adaptability and good universality.

The invention provides a steelmaking-continuous casting-hot rolling integrated scheduling method and system. The method comprises the steps of S1, performing initialization to obtain a steelmaking-continuous casting scheduling plan; S2, obtaining a hot rolling scheduling plan according to the current steelmaking-continuous casting scheduling plan as well as a working order demand, a production line model, a current production rhythm, a rolling unit length constraint, and a rolling unit internal adjacent plate blank width, thickness and hardness jump constraint; S3, determining whether an inventory change situation meets a preset inventory optimization plan or not according to the current steelmaking-continuous casting scheduling plan and the hot rolling scheduling plan, and if the preset rule is met, entering the next step, otherwise, adjusting current parameters related to inventory optimization and returning to the step S1; S4, obtaining overall heat supply rate data according to the current steelmaking-continuous casting scheduling plan and the hot rolling scheduling plan; S5, judging whether an integrated scheduling stop condition is met or not, and if the stop condition is met, performing the scheduling plan, otherwise, performing the next step; and S6, performing re-optimization to generate the steelmaking-continuous casting scheduling plan, and returning to the step S2.

The invention relates to a processing method for producing low-cost high-formability IF (interstitial-free) steel, which is based on thin-slab continuous casting and rolling and adopts a ferrite rolling process to produce the IF steel, belonging to the technical field of IF steel production. The processing method comprises the following working procedures of steelmaking, continuous casting, heating, rolling, cooling and coiling. A thin-slab continuous casting machine is adopted, the thickness of a continuous casting slab is at most 100mm, and the charging temperature is at least 880 DEG C. During hot rolling, a roughing mil and a finishing mill keep a continuous rolling relationship and keep micro-tension control, and water cooling equipment is used between the roughing mil and the finishing mill and is used for uniformly reducing the temperature of an intermediate slab with a thickness of 12-25mm from the temperature at least 950 DEG C of the outlet of the roughing mil into the range of 750-850 DEG C. Finish rolling is carried out in a ferrite area, and a lubrication rolling technology is adopted. The coiling temperature is higher and is 680-760 DEG C, slow cooling is carried out after coiling, and thereby an annealing process is finished. The invention provides a method for obtaining high-formability hot rolled sheets without cold rolling and cover annealing. The method has the advantages of being simple in process, low in cost, high in production efficiency, short in flow and the like, and the formability of products is higher.

The invention relates to an online steelmaking continuous casting control method, belonging to the technical field of steelmaking continuous casting; the method comprises the following steps: an interface management server is in network connection with a site controller, and stores the acquired various state information and process data in a database after data processing and format conversion, and also stores the production method delivered by the upper system in the database; a database server stores the production site real-time process data, planning data and various system configuration data in the database; an application server executes the steelmaking continuous casting production online control method, acquires data from the database server and stores the regulation result in the database; a client workstation displays various data, conducts the query of routine data, stores the data in a local computer and accordingly realizes the offline analysis of data; the online steelmaking continuous casting control method has high solving speed, higher automation degree, can preciously adjust to minutes, reduce the manual adjusting times and molten steel redundant waiting time.

The invention belongs to the technical field of steelmaking continuous casting, in particular to an online monitor of a continuous casting machine crystallize foot roll working state and a monitoring method thereof. The monitor comprises minitype CCD cameras, a video image acquiring module and an industry computer, wherein the minitype CCD cameras are arranged at the inner arc side and the outer arc side of a continuous casting machine foot roll area and is used for acquiring bi-dimensional image information; the video image acquiring module is used for receiving and storing the bi-dimensional image information; and the industry computer is used for processing and analyzing the bi-dimensional image information and display the final result. By installing the CCD cameras at the inner arc side and the outer arc side of the foot roll area and adopting the computer image processing technology to perform online image analysis on foot roll rotation condition and slag adhering condition, the working state of the foot roll can be monitored in real time, and alarm or corresponding fault treatment can be carried out timely based on the characteristics of abnormal conditions in necessity. The invention has the advantages of simple device structure, wide application range, realized remote monitoring by the image pickup technology, lowered labor intensity and danger level for field workers and improved whole automation level and intelligence level of the continuous casting machine.

The invention provides a rescheduling method and a rescheduling system of steel making and continuous casting on the basis of a genetic algorithm. The rescheduling method comprises the following steps: by virtue of the rescheduling system, acquiring a production batch plan, the current scheduling scheme and real-time scheduling data of a steel making and continuous casting system, carrying out disturbance identification and analysis, adjusting the current scheduling scheme in small disturbance, carrying out rescheduling in large disturbance; for all furnaces in the operation-finished furnace set, adopting actual scheduling information as a rescheduling subscheme of all the furnaces in the set; for all the furnaces in an operating-furnace set, on the basis of the actual scheduling information and a rescheduling target of the operation-finished furnace set, solving according to a hybrid algorithm of flow direct and a genetic algorithm; for all the furnaces in a stopped-furnace set, on the basis of the rescheduling subscheme of the operation-finished furnace set and the rescheduling subscheme of the operating-furnace set, solving according to the hybrid algorithm of the flow direct and the genetic algorithm. The rescheduling method and rescheduling system provided by the invention have the advantages that the problem of rescheduling under random disturbance in the process of steel making and continuous casting production can be solved.

The invention belongs to the technical fields of cold-rolled steel strips for a flux-cored wire, and making methods thereof, and concretely relates to a cold-rolled steel strip for a high-drawing-performance flux-cored wire, and a making method thereof. The cold-rolled steel strip for a high-drawing-performance flux-cored wire comprises 0.0035wt% or less of C, 0.03wt% or less of Si, 0.10-0.25wt% of Mn, 0.008wt% or less of P, 0.005wt% or less of S, 0.005wt% or less of N, 0.02-0.04wt% of Alt, and the balance Fe and other inevitable impurities. The making method of the cold-rolled steel strip for high-drawing-performance flux-cored wire comprises the steps of steelmaking, continuous casting, hot rolling, reeling, cold rolling, annealing, and flattening. The making method reduces the contents of C, Si, P and S, improves the drawing performance of the cold-rolled steel strip for the flux-cored wire, and improves the performances of the heat affected zone of a wedding material; and the appropriate control of the Mn content guarantees the stability of the whole cold-rolled steel strip for the flux-cored wire, and the enough elasticity of the finally-made cold-rolled steel stripe.

The invention provides a method used for steelmaking continuous casting production scheduling, which considers the dwell time of molten steel; the invention belongs to information technology filed and relates to the application of the construction of mathematical model and the solution algorithm in schedule scheme compilation. The invention is characterized in that the method consists of a model construction module, a schedule scheme compilation module and a database system. During the model construction process, the constraint of the steelmaking continuous casting production process is considered, the dwell time of molten steel is considered especially, as normal punishment is given to the dwell time of the molten steel within the limit of the dwell time and more punishment is given to the part exceeding the limit, the waiting time of every heat is balanced, and the molten steel rhythm qualified rate is improved. The method of the invention solves the problem existing in the background technology, by adopting the single parent genetic algorithm a steelmaking continuous casting production plan which is better than any existing scheduling method can be obtained, the online adjusting times are reduced, the energy and material consumption is reduced, and the method can be applied to the steelmaking continuous casting production scheduling system in iron and steel enterprises.

The invention belongs to the technical field of steelmaking continuous casting, and relates to a control method for typical middle cracks and center segregation during pipeline steel slab continuous casting. The control method comprises the steps that a roll gap of a casting machine is subjected to offline calibration and online detection, and it is guaranteed that precision is +/-0.2 mm; steel grade grouping is carried out, and matching of steel grades and thermophysical parameters is enhanced; the degree of superheat is strictly controlled, the proportion of equiaxed grains is increased, and developed columnar grains are avoided; a pulling rate and a secondary cooling process are adjusted, and basic roll gap control in the casting slab solidification process is optimized; and the soft press quantity is optimized, two or three segments of press are selected to the greatest extent according to the continuous casting process, and a large press quantity difference is avoided in press distribution between different sector segments. The control method has the beneficial effects that the internal quality of the casting slab is improved, and the product competitiveness is enhanced.

The invention relates to a method for accurately sizing a casting billet on a steelmaking continuous casting production line, in particular to a steelmaking square billet encoding and sizing method which comprises the following steps: mounting an increment rotary encoder on a roll of a withdrawal and straightening machine, establishing communication between an upper computer and a PLC by a network, and sending a cutting and sizing plan command from the upper computer to the PLC; when the PLC receives the signal, carrying out data trace calculation and comparison on the accumulated calculation length for sizing of the increment rotary encoder, the radian track of a dummy bar in accordance with a continuous casting process and the planed length of the upper computer; when the casting machine starts casting until stripping is finished, storing the current radian trace data of the dummy bar; and when the accumulated length of the encoder is greater than or equal to the planed length, the PLC sending a screwdown cutting command signal to a cutting vehicle, and simultaneously setting the accumulated length of the encoder to zero to carry out the next trace calculation of the sizing length. By using the withdrawal and straightening roll as a measuring roll, the invention realizes that the encoder can carry out trace calculation and measurement on the sizing data of the casting billet, thereby achieving the advantages of cost saving and accurate measurement.

The invention discloses a graph-model-based uncertain steelmaking-continuous casting flexibility optimization scheduling method and system. The method comprises: a flexibility scheduling model is constructed, a flexibility decision-making mode of a scheduling solution is described by using a graph model according to features of a steelmaking-continuous casting production process, and time buffer is set to protect the performance index and feasibility of the scheduling solution under an uncertain condition; optimized solution solving based on a distribution estimation algorithm is carried out,and an association relationship between decision-making variables is described by using a procedure-association-based probability model to generate a high-quality new population, and an expectation performance of the flexibility scheduling solution is evaluated by using a stochastic simulation method. During the simulation process, the limited computing resources are allocated dynamically based onthe optimal computational allocation technique, so that the evaluation efficiency of the population is improved. Therefore, optimization of the waiting time of the steelmaking-continuous casting scheduling process and the expected value of the discontinuous casting ratio in the uncertain environment is realized.

The continuous casting machine fault problem involves the casting characteristics of casting times, so that the conventional rescheduling method of steelmaking-continuous casting production for processing equipment faults is difficult to apply. The invention provides a steelmaking-continuous casting rescheduling method for solving a continuous casting machine fault, specifically comprising the steps of: establishing a rescheduling optimization model according to the difference of rescheduling strategies of different heat processes treatment after the continuous casting machine fault on the rescheduling process; and designing a new hybrid algorithm having the advantages of global searching ability of a comprehensive genetic algorithm and local searching ability of a variable neighborhood searching algorithm to perform iterative optimization of an optimal solution. The algorithm has the main characteristics: initial solutions of chromosomes are quickly obtained by using a decoding heuristic algorithm on the premise of complex constraint at the slack; and the quality of each initial solution is improved by using the variable neighborhood searching algorithm before population crossover mutation, wherein different neighborhood structures are designed for non-feasible solutions and feasible solutions. The method can effectively solve the rescheduling problem under the continuous casting machine fault.

The invention provides a continuous casting data space-time matching method based on heat tracking and casting flow tracking, and belongs to the technical field of steelmaking continuous casting. Themethod comprises the following steps: recording furnace number, casting flow production process data, key production time and key production events in real time, calculating the casting flow length inreal time through encoding, performing furnace number division on a just cut casting blank by utilizing the casting flow length, cutting information and the like, endowing the casting blank with furnace number information and casting blank number information, calculating a time window of the casting blank in each continuous casting device according to the casting flow length, matching the production process data of the time window with the time direction of the casting blank, and finally carrying out space-time transformation to finish the matching of the production process data with the length direction of the casting blank. According to the method, matching of the continuous casting production process and the casting blank can be rapidly and accurately completed, and data support is provided for continuous casting blank quality prediction and continuous casting production optimization control.

The invention belongs to the technical field of steelmaking continuous casting, and relates to an on-line thermal monitoring system of heat transfer symmetry of a crystallizer copper pipe on a continuous casting machine. The system comprises the crystallizer copper pipe which can monitor the heat transfer symmetry, a temperature data collection and storage module and an industrial control computer. The on-line thermal monitoring system is characterized in that a plurality of temperature measuring elements are embedded at the back of the copper pipe, and the temperature measuring elements are distributed in a 'cross' shape and in a symmetrical form based on the central section of the copper pipe. The invention comprehensively utilizes on-site actual measuring data and a computer numerical simulation technology, researches the heat transfer symmetry of a crystallizer by monitoring the surface temperature of the copper pipe, determines longitudinal distribution of heat flow of the crystallizer according to the transient heat flow calculated by the temperature of the copper pipe, calculates the temperature field of a continuous casting billet and the shell thickness of a solidification billet through a heat transfer mathematical model, and finally compares the situation of symmetrical surfaces. The invention can provide a basis for structural design of the crystallizer copper pipe and production process optimization of the crystallizer so as to promote the continuous casting billet to uniformly grow in the crystallizer.

The invention provides an online imaging man-machine interaction scheduling method for a steel making and continuous casting production process, and relates to the technical field of steel making and continuous casting. The method comprises steps as follows: initial steel making and continuous casting production scheduling plan data are acquired and displayed on a two-dimensional Gantt chart; actual production information of the steel making and continuous casting production process is acquired, and the disturbance condition is judged according to the actual production information of the steel making and continuous casting production process; and the initial steel making and continuous casting production scheduling plan data are adjusted according to time deviation disturbance, temperature deviation disturbance and ingredient deviation disturbance information, displayed in a two-dimensional Gantt chart manner and issued to a site for guiding production. In order to solve the problems that the plan adjustment speed is slow and the plan adjustment optimization degree is low due to the fact that the plan adjustment is manually entered by a scheduling worker of a steel making and continuous casting production scheduling system, an imaging man-machine interaction adjustment method based on the two-dimensional Gantt chart and online optimization of a time optimization scheduling model are combined, so that the online adjustment function of a scheduling plan is enhanced, and the scheduling plan optimization effect is improved.

The invention provides a simulation method for dynamic production run of a steelmaking continuous casting workshop. The method can be achieved through the following steps that firstly, according to the steelmaking process arrangement and logistics running characteristics, a corresponding steelmaking logistics circulation model is established; secondly, according to steelmaking continuous casting actual production, a molten iron/steel temperature change rule model, an equipment energy consumption rule model and an equipment matter consumption rule model are established; thirdly, the temperature change rule model, the equipment energy consumption rule model and the equipment matter consumption rule model in the second step are related with all equipment of the steelmaking logistics circulation model in the first step; fourthly, the simulation production task load and the molten iron/steel factory entering rhythm are set for logistics simulation calculation, and the corresponding rule models are dynamically called in the simulation process to calculate the temperature change, energy medium consumption amount and matter consumption amount of the molten iron/steel; fifthly, unit consumption of various kinds of matter under the production condition is obtained according to the simulation result, the unit price of the matter is set, and the production and running cost under different working conditions is calculated thereby.

The invention discloses zinc-based coating thermoforming steel based on a CSP process and a preparation method thereof. The method comprises the following steps of (1) steelmaking; (2) CSP continuouscasting; (3) CSP hot rolling; (4) acid pickling; (5) cold rolling; (6) hot dip galvanizing; and (7) thermoforming. A steel plate comprises the following chemical components of, by weight, 0.10-0.4 ofC, 0.10-0.50 of Si, 0.50-3.50 of Mn, less than or equal to 0.03 of P, less than or equal to 0.03 of S, less than or equal to 0.10 of Al, 0.10-2.50 of Cr, 0.10-2.50 of Ni, less than or equal to 0.03 ofMo, 0.0004-0.01 of B, less than or equal to 0.01 of N, 0.01-0.10 of Ti, the balance Fe, and inevitable impurities. A thermoforming substrate is produced by using the CSP process in a low-cost manner,and a zinc liquid component containing the Al, the Mg and REM elements is coated on the substrate to form a coating layer; the coating which is subjected to thermoforming is good in corrosion resistance, volatilization and oxidation of the zinc can be well prevented, and an oxidation layer is good in adhesiveness during the thermoforming process.

The invention relates to a production method of a tin plate. The tin plate comprises the following chemical components by percent: 0.0010%-0.0040% of C, 0.4%-0.7% of Mn, 0.03%-0.08% of Al, not more than 0.03% of Si, 0.015%-0.04% of Ti, 0.003%-0.005% of B, not more than 0.015% of P, not more than 0.015% of S, not more than 0.003% of N and the balance of Fe and some inevitable impurity elements. The production method of the tin plate sequentially comprises the following steps of: steel-making, continuous casting, hot-rolling, pickling, cold continuous rolling, continuous annealing, leveling and tinning. Compared with the prior art, the tin plate produced by the method is easy for subsequent processing, is unlikely to have defects of cracking, slip line cobwebbing or creasing and barring of a curved surface, is capable of meeting the needs of a user, and is low in cost and convenient for large-scale popularization.

The invention discloses a continuous casting sheet billet cutting tracking method, and belongs to the technical field of steelmaking continuous casting cutting. The continuous casting sheet billet cutting tracking method comprises the following steps that, the length L0 of a head billet and the total cutting length Lcut of the head billet are worked out; the length Ln1 of a later sheet billet and the total cutting length Ls1 of the later sheet billet are obtained; the length Ln2 of the sheet billet when the casting length is not increased any more is obtained, and the total cutting length LS2 of the sheet billet when the casting length is not increased any more is obtained; according to the obtained length of the sheet billet, a heat number corresponding to the sheet billet is matched; according to the casting specification of a casting machine, the length range of the sheet billet is given; cutting plans are compared, and the actual sheet billet number and planned sheet billet numbers are sequentially matched; and the continuous casting molten steel yield is obtained according to the obtained length of the sheet billet. According to the continuous casting sheet billet cutting tracking method, head skin tail billets and scraped billets can be recognized, and the molten iron yield is obtained. The cutting plans can be compared, corresponding heat numbers of various sheet billets can be matched, front procedure technology data of the sheet billet are obtained so as to guide the later technology production, human factor effects are eliminated, and accuracy is high.

The invention discloses a method for processing conflict among multiple cranes in a logistics simulation system in a steelmaking continuous casting workshop, and the method contains the following contents: a method for dividing a task or operation region of the cranes in combination with technological requirements; a conflict processing function which inserts a preoccupation task and enables the cranes to avoid in the opposite direction; a method for setting the priority and the preoccupation value of a task sequence of the cranes; a conflict processing method for partitioning a span at which multiple cranes are located; and a method for controlling the conflict by utilizing network nodes. Compared with the prior art, the method can effectively intervene in and process the conflict among multiple cranes arranged in a same span in the logistics simulation system, thus providing a precondition for the correct promotion of a simulation clock.

The invention discloses a method for solving transverse cracks of an ultra-thick plate billet corner by applying a 3D (Three-dimensional) spraying process, belonging to the technical field of steelmaking continuous casting secondary cooling system. The method comprises the following process steps of: determining fan-shaped sections for installing 3D nozzles; determining a distribution principle of the position of each 3D nozzle at each fan-shaped section; determining the distribution mode of the 3D nozzle at each fan-shaped section along a billet drawing direction; and determining the distance between a spraying edge of the 3D nozzle at each fan-shaped section and a cast billet corner part. The method has the advantages of controlling the incidence rate of the transverse cracks of the ultra-thick plate billet corner effectively, and improving the molding rate of the steel billet.

The invention relates to an intelligent weighing method for a travelling crane. The method mainly aims at solving the technical problems in an existing steelmaking production process that the fluctuation of a measured value of the travelling crane is great and the weighing precision is low. According to the technical scheme, the intelligent weighing method provided by the invention comprises the following steps: (1) acquiring travelling crane data and automatically acquiring working parameters of the working travelling crane through a travelling crane dispatching computer system; (2) judging a hoisting state of the travelling crane and judging a travelling crane working procedure position and a hoisting working state through the travelling crane dispatching computer system according to a travelling crane operating zone and positions from main and secondary hooks of the travelling crane to a travelling crane girder; (3) weighing a travelling crane hoisted object, raising the travelling crane hoisted object for a certain height and keeping stable and weighing the hoisted object in real time through a weighing apparatus on a transverse beam of the main hook of the travelling crane; and (4) judging weighing original data of the travelling crane. According to the intelligent weighing method for the travelling crane, a computer system and the travelling crane dispatching computer system are controlled by utilizing an existing production process of enterprises and automatic weighing of the travelling crane hoisted object is realized; and the intelligent weighing method is high in weighing precision and low in cost, the smelting precision of a converter is effectively ensured and steelmaking-continuous casting production is stably and smoothly carried out.