197 results about "Steelmaking continuous casting" patented technology

The invention relates to a steel production-oriented multi-base multi-production-line multi-process global plan optimization method and system. The method comprises the following steps of: receiving and standardizing order demand data; executing hierarchical processing and distribution of multi-base orders, and outputting a base-level order set; deducting and marking the net production demand quantity of the base-level orders; executing multi-production-line order allocation in a single base, and generating a production line level order set; performing cross-process collaborative batch grouping on the production line level order set based on steel making-continuous casting-rolling-post-processing process constraints to generate a cross-process batch plan; constructing a global evaluation model, performing comprehensive evaluation on an intermediate result, and generating a parameter correction instruction based on an evaluation result for adjusting parameters, constraints or distribution strategies of subsequent modules; and finally, generating a production plan scheme with consistent cross-base, cross-production-line and cross-process, and triggering rolling optimization update when disturbance occurs. According to the invention, unified coordination and global optimization of multi-module plan results are realized.

The invention discloses a novel quick-change mechanism with a flow control function for a tundish. The novel quick-change mechanism comprises a mounting part, a sliding part, a pressing part, a first driving part and a second driving part. And the functions of the stopper rod opening and closing device are integrated on the tundish quick-change nozzle device, so that the investment, the installation site, the maintenance cost, the spare part site and the cost of a set of equipment are saved. The two sets of equipment are combined into a whole, so that the number of operators in a steel mill is reduced, and meanwhile, preparation is made in advance for the subsequent steel mill if intelligent and automatic control over steel-making continuous casting is adopted, and the positive effect is achieved.

The invention provides a method and device for determining steelmaking-continuous casting production multi-process collaborative demand response, and relates to the technical field of manufacturing, and the method comprises the steps that target parameters in the steelmaking-continuous casting production process are obtained; based on a production plan, each work starting moment, each work ending moment, each unit energy consumption and time-of-use electricity prices of different time periods included in the target parameters, by taking the minimum energy cost and the minimum waiting duration as targets and based on an MILP method, establishing a heat coordinated optimization material flow mathematical model in the steelmaking-continuous casting production process and solving the heat coordinated optimization material flow mathematical model; and a coordinated optimization demand response strategy is obtained. According to the method, the coordinated optimization demand response strategy in the steelmaking-continuous casting production process is quickly obtained by solving the heat coordinated optimization material flow mathematical model, so that the determination efficiency of the heat distribution strategy is improved, the internal flexibility adjustment potential of iron and steel enterprises can be mined by the obtained coordinated optimization demand response strategy, and the economic benefit of the enterprises is improved. And friendly interaction between iron and steel enterprises and a power grid is promoted.

The invention relates to the technical field of steelmaking continuous casting, in particular to a continuous casting slab longitudinal crack real-time prediction method based on deep learning, which comprises the following steps: data acquisition and preprocessing: acquiring continuous temperature time sequence data on a plurality of rows of thermocouples of a crystallizer copper plate; a hybrid neural network model is constructed, an input layer is used for receiving L * N-dimensional temperature time sequence data, L is a time window length, N is a crystallizer thermocouple number, a feature extraction module comprises a multi-scale feature extraction module and a feature interaction bidirectional LSTM layer, and a classification module constructs a network structure of a full connection layer, a Dropout layer and an output layer; according to the method, online prediction of slab longitudinal cracks is realized, deep features of temperature time sequence data are automatically learned through an end-to-end model, and prediction precision and real-time performance are remarkably improved in combination with a hybrid neural network architecture.

The invention discloses steelmaking continuous casting spraying equipment with a recycling mechanism, and relates to the technical field of spraying, and the steelmaking continuous casting spraying equipment comprises a composite mechanism. According to the steelmaking continuous casting spraying equipment with the recycling mechanism, through the design of the composite mechanism, materials are conveyed into the composite shell through the first conveyor, liquid is conveyed through the water pump to enter the spraying shell from the water guide pipe, and finally the materials are sprayed through the spraying head, so that the effect of cooling the materials is achieved; the spraying shell is driven by the pressure generated by water flow to rotate through the rotating structure, so that the effect of rotating spraying is achieved, the spraying range is enlarged, the spraying cooling effect is improved, the effect of uniformly cooling the materials is achieved, the situation that cooling is not uniform is avoided, and the service life of the materials is prolonged. Stress is generated in the casting blank due to non-uniform cooling, defects such as deformation and cracks of the casting blank are easily caused, the mass of the casting blank is reduced, and liquid enters the bottom of the composite shell, so that recycling is facilitated.

The invention discloses a 500MPa-grade low-cost anti-seismic fire-resistant steel plate and a preparation method thereof, and the steel plate comprises the following chemical components in percentage by weight: 0.02 to 0.10 percent of C, 0.1 to 0.3 percent of Si, 1.2 to 1.6 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.006 percent of S, 0.15 to 0.35 percent of Mo, 0.01 to 0.06 percent of Nb, 0.16 to 0.20 percent of V, 0.040 to 0.045 percent of Ti, 0.0014 to 0.0018 percent of B, 0.002 to 0.003 percent of N and the balance of Fe and inevitable impurities. The preparation method comprises the procedures of blast furnace ironmaking, converter steelmaking, continuous casting and rolling. The low-cost anti-seismic fire-resistant steel plate is manufactured by accurately controlling the content of alloy elements and controlling parameters of rolling and cooling processes, so that the requirements of the building industry on high-performance building materials are met.

The invention relates to the technical field of steel metallurgy steelmaking continuous casting, and provides a cooling control device of a continuous casting machine fan-shaped section, the cooling control device is arranged on a machine frame of a continuous casting machine, the continuous casting machine is provided with a roller row and a nozzle installation frame, the roller row and the nozzle installation frame are both arranged on the machine frame, and the cooling control device is located between the roller row and the nozzle installation frame. The water retaining piece is arranged on the rack and located between the roller row and the nozzle mounting frame, and the water retaining piece is provided with a first containing groove; the telescopic water baffle is movably arranged in the first containing groove and used for blocking water flow sprayed out of the nozzle on the nozzle mounting frame. The output end of the automatic adjusting mechanism is arranged on the telescopic water baffle and used for driving the telescopic water baffle to move. By means of the technical scheme, the problem that the corner of a narrow-section steel billet is prone to being subjected to gathered water flow, internal stress is generated, and then the quality of the corner of the steel billet is poor is solved.

The invention provides a steelmaking continuous casting production process anomaly detection method and system, and relates to the technical field of production process anomaly detection, and the method comprises the steps: arranging monitoring points at key process nodes, determining the connection relation between the monitoring points, calculating the edge weight through the weighted sum of mutual information entropy and process connection coefficients, and building a process topological graph. An adjacent matrix is constructed, and feature vectors are formed by aggregating feature information of adjacent nodes; inputting the feature vector into a gating circulation unit, outputting a monitoring point time sequence state representation, and calculating a mahalanobis distance with a normal state to obtain a preliminary abnormal score; and determining the importance of each monitoring point, and calculating an anomaly correction factor in combination with the anomaly frequency to obtain an anomaly evaluation index. And performing kernel density estimation on the monitoring point anomaly evaluation index to obtain a joint anomaly probability density value, and judging whether the current production is in an abnormal state or not. According to the method, the abnormal degree in the production process can be comprehensively reflected, and the abnormal condition can be quickly identified in practical application.

The invention belongs to the field of steelmaking and continuous casting, relates to a method for improving the desulfurization rate of LF treated low silicon steel, and aims to solve the problems of low sulfur distribution coefficient and poor slag fluidity in the traditional LF desulfurization process during low silicon steel smelting. During converter tapping, table aluminum or high-aluminum iron is added for pre-deoxidation, and lime slag is added for washing desulfurization; before the molten steel enters the LF, argon blowing and oxygen determination are carried out at a CAS station, and an aluminum wire is fed to control the Als content; during LF treatment, lime is added to make high-alkalinity slag, and a ladle slagging agent is synchronously added to increase the flowability of top slag. According to the method, the KR desulfurization procedure is omitted, the technological process is simplified, the production cost is reduced, meanwhile, the desulfurization efficiency is improved, and the steel quality is guaranteed.

The invention discloses alloy spring steel, a wire rod, a spring and a preparation method and application thereof and belongs to the technical field of alloy spring steel. The preparation method of the alloy spring steel comprises the following steps: S1, steelmaking; s2, performing continuous casting to obtain a bloom; s3, the large square billets are subjected to hot charging and hot conveying to a heating furnace, and cogging is conducted after heating, so that small square billets are obtained; in the hot charging and hot delivery process, after high-pressure water is adopted for descaling a bloom, anti-decarburization slurry A is sprayed; the coating A is prepared from the following components: 35 to 40 percent of SiO2, 22 to 26 percent of SiC, 11 to 15 percent of Al2O3, 6 to 10 percent of MgO, 5 to 8 percent of TiO2, 3 to 6 percent of ZrO2 and 3 to 6 percent of CaO; s4, cold charging and spraying of anti-decarburization slurry B; and S5, the small square billet is heated, rolled and cooled, and the alloy spring steel is obtained. On the basis of ensuring the strength and fatigue resistance of the spring, the production cycle is shortened, the loss is reduced, and the cost is reduced.

The invention discloses a production method of low-noise non-oriented silicon steel for a driving motor of a new energy automobile, and the non-oriented silicon steel with the thickness ranging from 0.20 mm to 0.30 mm is prepared through steelmaking, continuous casting, hot rolling, normalizing, acid pickling, cold rolling, annealing and coating which are carried out in sequence. According to the low-noise non-oriented silicon steel for the driving motor of the new energy automobile, the texture of a finished product is controlled by adjusting alloy components, controlling the thickness of a hot rolled plate and optimizing the reduction distribution and the strain rate of each pass of cold rolling, the low-noise non-oriented silicon steel for the driving motor of the new energy automobile is finally obtained, the thickness of the product ranges from 0.20 mm to 0.30 mm, the performance index meets 400 Hz, and the production cost is low. The average magnetostriction coefficient lambda p-p which is parallel to the rolling direction and forms an angle of 55 degrees with the rolling direction under 1.0 T is less than or equal to 10 * 10 <-6 >, the average weighted sound level decibel value AWV (dBA) is less than or equal to 100, and the average loss P1.0 / 400 is less than or equal to 10 + 40 * t2W / kg (t is the thickness of a finished product, and t is more than or equal to 0.20 mm and less than or equal to 0.30 mm).

The invention discloses steel-making continuous casting throwing guide equipment, and relates to the technical field of throwing guide, and the steel-making continuous casting throwing guide equipment comprises a composite mechanism. According to the steelmaking continuous casting throwing guide equipment, through the design of a composite mechanism, materials enter from the side close to the motor, the motor drives the roll shaft to rotate, so that the effect of conveying the materials to move is achieved, the materials are covered with the covering cover in the conveying process, contact between the materials and the outside is reduced, potential safety hazards in the operation process are reduced, and the production efficiency is improved. Secondly, in the process that the roll shafts drive the materials to move, the materials are attached to the surfaces of the materials by adjusting the distance through the guide mechanism, so that the effect of guiding material conveying is achieved, the effect of guiding material conveying is achieved, and it is guaranteed that the casting blanks do not have the defects of cracks, segregation and the like in the solidification process; in this way, the movement space of the materials is limited, the materials are prevented from colliding with parts in the conveying process, and therefore the effect of keeping the integrity of the materials is achieved.

The invention relates to the field of steelmaking-continuous casting, in particular to a method for calculating crystallizer corner heat flux, based on finite element analysis, temperature field and heat flux density distribution in a crystallizer are simulated, a boundary heat flux mathematical model influenced by corner air gaps is established, and the method specifically comprises the steps that S1, polynomial fitting is conducted on heat flux parameters; and S2, calculating the heat flux of the crystallizer. The method has the advantages that on the basis of mathematical modeling and finite element analysis, heat flow attenuation characteristics are combined, the change rule of heat flow along with the casting blank height and the corner position is found, heat transfer resistance caused by an air gap formed by solidification shrinkage is corrected, heat flow density boundary conditions are optimized, and an accurate crystallizer corner heat flux calculation model is established; the method can accurately predict the temperature distribution of the corners of the crystallizer and provide guidance for production process optimization, so that the casting blank quality is improved, and the corner crack occurrence rate and the breakout risk are reduced.

The invention discloses a production method of low-noise non-oriented silicon steel for a driving motor of an electric vehicle, and the non-oriented silicon steel with the thickness ranging from 0.20 mm to 0.30 mm is prepared through the sequential steps of steelmaking, continuous casting, hot rolling, normalizing, pickling, cold rolling, annealing and coating. Aiming at the noise level improvement requirement of a driving motor of an electric vehicle, on the premise of considering the production feasibility of non-oriented silicon steel, on one hand, the average grain size of a non-oriented silicon steel hot-rolled coil after normalization is controlled according to the content of Si and Al in steel; on the other hand, cold rolling parameters are controlled by optimizing the cold rolling pass, the roller diameter and the inlet and outlet thickness of each pass, the texture of a finished product is controlled on the premise that the cold rolling property is guaranteed, and therefore the low-loss and low-noise non-oriented silicon steel for the driving motor of the electric vehicle is obtained, the product thickness ranges from 0.2 mm to 0.3 mm, the frequency ranges from 400 Hz, and the production cost is low. Under 1.0 T, the average magnetostriction coefficient lambda p-p parallel to the rolling direction and perpendicular to the rolling direction is smaller than or equal to 10 * 10 <-6 >, the average weighted sound level decibel value AWV (dBA) is smaller than or equal to 100, and the average loss P1.0 / 400 is smaller than or equal to 9 + 50 * t2W / kg.

The utility model relates to the field of steelmaking continuous casting equipment, in particular to a large round billet continuous casting machine cold start throwing connecting device which comprises an annular cover, the annular cover is formed by welding steel bars, the rear end of the annular cover is connected with an end cover, the end cover is formed by welding steel bars, and an L-shaped connecting frame is welded to the front end of the annular cover. And a baffle plate corresponding to the L-shaped connecting frame is arranged on the annular cover. As a filling aggregate for the hook head part of the end part of the casting blank, the filling aggregate has the effect of quickly reducing the casting blank temperature of the hook head part of the end part of the casting blank, improves the mechanical strength of the hook head part of the end part of the casting blank, ensures reliable connection, ensures successful cold start of a continuous casting machine, reduces cold start accidents, improves the operation rate of the continuous casting machine and reduces the cost of a continuous casting process.

The invention relates to an easy-to-form corrosion-resistant and wear-resistant steel plate for a conveying pipeline and a manufacturing method thereof, and belongs to the field of pipeline steel. The surface Brinell hardness of the wear-resistant steel plate is 370-430 HB, the ductility is larger than or equal to 10%, the Charpy V-shaped impact energy at the temperature of-40 DEG C is larger than or equal to 30 J, d is equal to 4 t, and no crack exists after 180-degree cold bending; the martensite structure is uniform and fine, the grain size is larger than or equal to 7 grades, and the total grade of A, B, C and D fine inclusions in the structure is smaller than or equal to 2.0. And under the working condition that the pH value is 6.0-8.5, the corrosion resistance of the steel can be improved by 40% or above compared with that of Q355 structural steel. A high-cleanliness steelmaking continuous casting process, plate blank hydrogen diffusion, two-stage controlled rolling, high-temperature normalizing pretreatment, off-line quenching and tempering are adopted, control is conducted from the aspects of chemical component design, base metal structure and the like, and the low-temperature toughness, formability, corrosion resistance and weldability of the wear-resistant steel plate for the conveying pipeline are guaranteed; and a solution is provided for the application of the long-service-life wear-resistant pipeline.

The application discloses a non-oriented silicon steel for a fixed-frequency compressor motor core and a preparation method thereof. The preparation method comprises the following steps: steelmaking, continuous casting, and the chemical composition of the continuous casting blank is as follows in terms of mass percentage: Si: 0.7%-1.0%, Al: 0.42%-0.60%, Si / Al=1.5-1.7, Mn: 0.1%-0.3%, Nb<=0.005%, V and Ti are all <=0.006%, Cr and Ni and Cu are all <=0.03%, and the rest is Fe; the continuous casting blank is heated to 1050-1100 DEG C and kept for 180+ / -30 min, rough rolling, finish rolling and coiling; the finish rolling opening rolling temperature is 880-910 DEG C, the outlet temperature is 800-820 DEG C, and the coiling temperature is 600-620 DEG C; acid continuous rolling is carried out to prepare a cold-rolled plate with a thickness of 0.500+ / -0.005 mm; and annealing is carried out at an annealing temperature of 880-920 DEG C for an annealing time of 70s+ / -10s.

The utility model provides a connecting device for a movable tool apron and a shearing oil cylinder of a hydraulic shearing machine and the shearing machine, and belongs to the technical field of steelmaking continuous casting equipment. The top end of the connector is sleeved with a first thrust knuckle bearing, and the upper portion of the first thrust knuckle bearing is arranged in a counter bore of the movable tool apron; a first fixed connecting part is arranged at the bottom end of the connector and is connected to a piston rod of the shearing hydraulic cylinder; a step through hole is formed in the connector; the pull rod penetrates through the stepped through hole, the top end of the pull rod penetrates through the interior of the movable tool apron, and a second fixed connecting part is arranged on the pull rod and connected to the bottom of the movable tool apron; the lower portion of the pull rod is sequentially sleeved with a second thrust knuckle bearing, a pressing check ring and a fastening mechanism. By utilizing the utility model, the problem that the service life of the shearing hydraulic cylinder is influenced by the radial force on the piston rod of the hydraulic cylinder due to the shearing motion of the movable tool apron when the slideway is abraded or the assembly precision is not enough in the prior art can be solved.

The present invention relates to a dust removal duct installation structure for a steelmaking continuous casting plant, comprising a plurality of roof longitudinal beams, a plurality of roof transverse beams, a plurality of pipe supports, a transport bracket, a transverse push bracket, and the roof transverse beams are respectively installed between two adjacent roof longitudinal beams, and the roof longitudinal beams and the roof transverse beams are divided into a dust removal duct installation area and a dust removal duct grouping area; the pipe supports are fixedly installed on two adjacent roof longitudinal beams; the transport bracket is fixedly installed on the outer side surface of the pipe support at the outermost edge of the dust removal duct grouping area; the transverse push bracket is fixedly installed on two adjacent pipe supports in the dust removal duct grouping area; the present invention can quickly install the dust removal duct when the roof transverse beams have been installed, and the factory roof structure will not be unable to be closed in time due to the reserved factory roof beams not being installed, which seriously affects the construction period. At the same time, when the dust removal ducts on the continuous casting plant roof are replaced and repaired in the maintenance project, the roof transverse beams do not need to be removed, and the normal operation of the production crane in the factory will not be affected.

The utility model relates to the technical field of steelmaking equipment, in particular to a steelmaking continuous casting camera shooting and sizing automatic detection device which comprises a primary camera shooting and sizing system, a secondary camera shooting and sizing system and a detected continuous casting billet. The primary camera shooting sizing system and the secondary camera shooting sizing system surround the detected continuous casting billet; the primary camera shooting sizing system is connected with the continuous casting PLC control system through an optical fiber network. The steelmaking continuous casting camera shooting fixed-length automatic detection device is used for secondary verification of the length of a fixed-length steel billet after continuous casting flame cutting, the work that the fixed-length length is manually measured and then secondary correction is conducted is replaced, and the problems that timeliness is poor and the labor intensity of workers is large are solved; and meanwhile, on-line automatic adjustment of sizing is achieved, and the precision of sizing casting blanks is greatly improved.

The utility model discloses a steelmaking continuous casting machine waste heat recycling device which comprises a conveying pipe and a heat exchanger, an annular blocking plate is arranged at the casting blank inlet end of the conveying pipe, a plurality of annular cavities are sequentially formed in the conveying pipe at intervals from the casting blank inlet end to the casting blank outlet end, and each annular cavity is connected with a cold air pipe. A plurality of air nozzles are uniformly distributed on the circumference of the side wall of the side, facing the annular blocking plate, of the annular cavity, cooling cavities are formed between the adjacent annular cavities and between the annular blocking plate and the annular cavities, a plurality of conveying rollers are arranged in the cooling cavities, an exhaust pipe is arranged on the side wall of the side, close to the annular blocking plate, of the cooling cavity, and a heat exchange pipe assembly is arranged in the heat exchanger. The exhaust pipe is communicated with an inlet of the heat exchange pipe assembly, a water supplementing opening is formed in the heat exchanger, an air compressor and a vortex tube which are communicated are arranged on the outer side of the conveying pipe, and a cold air outlet of the vortex tube is communicated with the cold air pipes. In conclusion, the casting device has the advantages of being small in heat loss, high in casting efficiency and high in heat recovery rate.

The invention provides a double-length cutting device and method for a continuous casting machine, and belongs to the technical field of steelmaking continuous casting equipment. The double-length cutting device of the continuous casting machine comprises a cutting unit, the cutting unit comprises a movable frame body, a primary flame cutting machine and a secondary flame cutting machine, the primary flame cutting machine and the secondary flame cutting machine are installed on the movable frame body, and the distance between the primary flame cutting machine and the secondary flame cutting machine can be adjusted in the running direction of a casting blank so that the double-length cutting requirement of the casting blank can be met; the multiple roller bed units are located below the cutting device, the multiple roller bed units are sequentially arranged at intervals in the casting direction, each roller bed unit is provided with a roller bed and an avoiding mechanism, the roller beds support the casting blanks, and the avoiding mechanisms drive the roller beds to move between the working position for bearing the casting blanks and the avoiding position for avoiding the cutting flame flow; and the synchronizing unit is arranged on the movable frame body, and the synchronizing unit controls the movable frame body to be synchronized with the moving casting blank. The equipment investment and workshop construction cost are greatly reduced, and the adaptability and economical efficiency of the continuous casting production line are enhanced.

The application provides a 500MPa-grade low-yield-ratio high-corrosion-resistance hot-dip galvanized low-density steel and a manufacturing method, and the steel plate composition is as follows in percentage by weight: C: 0.065%-0.073%, Si: 0.42%-0.54%, Mn: 1.51%-1.62%, Al: 3.3%-6.5%, P: <=0.010%, S: 0.01-0.03%, RE: 0.01%-0.015%, and the balance is Fe and inevitable impurities. The manufacturing method of the steel comprises the following steps: blast furnace molten iron pretreatment, converter steelmaking, continuous casting, hot continuous rolling, pickling, cold rolling, hot-dip galvanizing; and the steel organization structure is as follows: delta-ferrite + martensite + residual austenite + sulfide, wherein the martensite content is 5.2%-7.0%, the residual austenite content is 3.5%-3.8%, and the sulfide composition is a small amount of dispersedly distributed MnS and RE-S-O, a small amount of MnS is dispersedly precipitated in ferrite and martensite, and RE-S-O is distributed along the ferrite grain boundary.

The present application provides a method for producing low-temperature and high-magnetic induction oriented silicon steel based on grain homogenization control, and the process steps include steelmaking, continuous casting, billet heating, hot rolling, normalization, primary cold rolling, decarburization and nitriding, high-temperature annealing and stretching and flattening of oriented silicon steel. The present invention determines the heating temperature according to the chemical composition, determines the normalization temperature by the heating temperature and the actual chemical composition, determines the decarburization annealing temperature by the normalization temperature, and determines the hot rolling and cold rolling processes according to the grain homogenization principle. In the production of high-magnetic induction oriented silicon steel, the processes between each process affect each other. The advantage of the present invention is that the process of the latter process is formulated according to the process of the former process, and through multiple grain recrystallization controls of processes such as hot rolling, normalization, and annealing, the primary recrystallized grains of the decarburization annealing tend to be homogenized, and finally good magnetic properties are obtained.

The application discloses a continuous casting billet and red delivery system and method, and belongs to the field of steelmaking and continuous casting in steel production. In order to improve production efficiency, the continuous casting billet and red delivery system comprises a billet delivery roller way (1), the billet delivery direction of the billet delivery roller way (1) is a right-to-left direction, along the billet delivery direction of the billet delivery roller way (1), a first fire cutting machine (2), a second fire cutting machine (4), a slide rail (7) and a billet collecting device (8) are sequentially arranged on the billet delivery roller way (1), the slide rail (7) extends along the front-to-back direction, along the front-to-back direction, one end of the slide rail (7) is provided with a billet pushing machine (6), and the other end of the slide rail (7) is provided with the billet collecting device (8); the billet on the billet delivery roller way (1) can be transferred to the slide rail (7), and the billet pushing machine (6) can push the billet on the slide rail (7) into the billet collecting device (8). The continuous casting billet and red delivery system and method can directly produce short fixed-size billets in a continuous casting workshop, and improve the production efficiency of rolling.

The invention discloses a galvanized ultrahigh-strength multiphase steel plate for a threshold beam and a production method of the galvanized ultrahigh-strength multiphase steel plate. The galvanized ultrahigh-strength multiphase steel plate comprises the following chemical components in percentage by mass: 0.11-0.13% of C, 2.30-2.45% of Mn, less than or equal to 0.005% of S, less than or equal to 0.020% of P, 0.20-0.30% of Si, 0.030-0.060% of Als, 0.50-0.60% of Cr, 0.030-0.070% of Nb + Ti, 0.05-0.10% of Mo, less than or equal to 0.003% of B and the balance of Fe and inevitable impurities. The production method comprises the procedures of steelmaking, continuous casting, hot rolling, acid rolling, continuous galvanizing and finishing. The low-Si, low-Mo and low-C component design is adopted, and the obtained steel plate is excellent in coating quality and moderate in yield ratio, has obvious advantages in the aspect of roll forming of the body-in-white doorsill beam and has good cyclic corrosion resistance.

The utility model relates to movable dust removal equipment for steel ladle hot repair, and belongs to the field of steelmaking continuous casting dust removal. The two guide rails and the two supporting bridges are fixedly arranged on the ground; the multiple hubs are arranged on the supporting bridge frame and connected to the guide rails in a rolling mode. The dust hood is mounted on the supporting bridge frame, and a bag type dust collector and a fan are mounted at the top of the dust hood; an air inlet pipe is fixedly arranged at an inlet of the bag type dust collector and is communicated to a dust collection cover opening of the dust collection cover; an outlet of the bag type dust collector is fixedly provided with an air outlet pipe, the air outlet pipe is communicated to a draught fan, the device travels to the position above a steel ladle to be subjected to hot repair, the dust removal mode is started before the steel ladle is subjected to hot repair, and by means of the sealing characteristic of the dust removal device, excessive wild wind suction is avoided, and dust overflow is avoided. When the steel ladle is subjected to hot repair, the fan is started; and when no task exists, the fan operates at low frequency or stops, so that the operation cost can be greatly saved, and considerable social benefits are achieved.

The invention discloses automatic constant-temperature reciprocating rolling equipment and process for a titanium alloy bar cogging mill, and belongs to the technical field of steelmaking continuous casting and rolling. The equipment comprises two rotatable movable metal detector devices, a feeding induction heating system and a discharging induction heating system, wherein the two rotatable moving type metal detector devices are oppositely arranged on the left side and the right side of a roller respectively, the feeding induction heating system is arranged on the front side of the feeding conveying roller way, and the discharging induction heating system is arranged on the front side of the discharging conveying roller way. By means of the rotatable movable metal detector device, the detection precision is improved, the device adapts to the production rhythm of a cogging mill, the steel throwing position can be controlled to be close to a roller as far as possible, the rolling efficiency is improved, the titanium blank temperature loss in the rolling process is reduced, and meanwhile the manual operation risk is reduced. In addition, the situation that the temperature of the head and the tail of the blank is not uniform is improved through the induction heating system, and therefore the temperature is kept constant in the whole rolling process.

The invention belongs to the technical field of steelmaking and continuous casting, and particularly relates to a system and method for remotely controlling accident water through a continuous casting machine by applying PID. The system comprises a first connecting pipe, a machine cooling pump, an accident water tank, an accident water inlet pipe, an accident water return pipe, a second connecting pipe and a PID control unit. A water return port of the continuous casting machine is connected with one end of the machine cooling pump through a first connecting pipe, and the other end of the machine cooling pump is connected with a water inlet of the continuous casting machine through a second connecting pipe. The accident water tank is connected with the second connecting pipe through an accident water inlet pipe; the PID control unit comprises an accident water return valve control unit and a PIC control unit; the accident water return valve control unit is arranged on the accident water return pipe; the PIC control unit is connected with the first connecting pipe; and the accident water return valve control unit is connected with the PIC control unit. Based on the system and the method, the problems that a traditional accident water control method is large in error, insufficient in reliability, weak in anti-interference capacity and high in maintenance cost can be solved.

The utility model discloses a multi-channel environment-friendly dust removal device, which relates to the dust removal field in the steelmaking continuous casting field and comprises three bag-type dust removers, bottom end inlets of the three bag-type dust removers are all connected with input pipes, top end outlets of the three bag-type dust removers are all connected with output pipes, and the output pipes are connected with the three bag-type dust removers. The input ends of the three input pipes are connected with a first draught fan, a second draught fan and a third draught fan correspondingly, the input ends of the first draught fan, the second draught fan and the third draught fan are all connected with connecting pipes, and the input ends of the three connecting pipes are all connected with four-way pipes. By arranging the first pipeline connecting mechanism and the second pipeline connecting mechanism, mutual parallel connection of a plurality of workshop dust removal systems is achieved, when a certain workshop is in a low-frequency production state, the corresponding draught fan can be closed, dust removal is assisted through other draught fans, and when a certain draught fan is damaged, the other draught fans can be closed. And the situation that dust and impurities cannot be removed in time, and consequently the bodies of workers are injured can be avoided in an auxiliary dust removal mode.