1481 results about "Tundish" patented technology

The invention belongs to the technical field of metallurgical continuous casting, and particularly relates to a method for removing tundish inclusions based on cooperation of an external electric field and physics. The invention discloses a method for removing tundish inclusions based on cooperation of an external electric field and physics, and mainly aims at solving the problems that as the inclusions in tundish molten steel enter a subsequent continuous casting link, a submersed nozzle is clogged and blocked, and the quality of a casting blank is deteriorated. The key point is that an external electric field and physics synergistic effect is used; a bottom blowing device is arranged to provide power for floating of inclusions; an original baffle weir structure of the tundish is improved, and the probability of catching inclusions is increased; and an external electric field is cooperatively used, so that the inclusions are promoted to float towards the tundish covering agent and be attached to the blocking weir. By means of the method for cooperatively removing the tundish inclusions based on the external electric field and physics, the tundish molten steel inclusions can be obviously removed, the service performance of a subsequent water gap is optimized, the casting blank quality is improved, and the improvement of the high-quality steel smelting level in China is assisted.

The invention discloses an anti-stripping tundish cover castable packaging device which comprises a rotary connecting frame, the rotary connecting frame is installed between the bottoms of two first connecting rods, and two clamping assemblies and a heat sealing assembly are installed in the middle of the rotary connecting frame. Limiting assemblies used for limiting the rotary connecting frame are installed on the outer walls of the two first connecting rods correspondingly, the two clamping assemblies and the heat sealing assembly are symmetrically arranged in the middle of the rotary connecting frame correspondingly, the bottom of the rotary connecting frame is stressed, and the clamping assemblies and the heat sealing assembly are driven at the same time. Through the arrangement of the clamping assembly, in the downward moving process of the sliding plate, the transmission rod is driven to rotate and deviate, meanwhile, the connecting frame is pulled, the arc-shaped plates are driven to move, the two arc-shaped plates are close to each other, the packaging bag in the loading process and the full packaging bag are supported, and the situation that in the process, the packaging bag topples over, and the loading effect is affected is prevented.

The invention relates to the technical field of thin-strip cast rolling, and provides a thin-strip cast rolling tundish continuous casting device and method.The thin-strip cast rolling tundish continuous casting device comprises a base frame horizontally installed on the surface of a foundation, and the base frame is provided with a flow distribution ladle, a tundish and a large ladle from bottom to top; an adjusting mechanism is arranged below the position, where the casting position is arranged, of the base frame, the adjusting mechanism comprises two limiting plates which are symmetrically arranged, and one side of the middle of each limiting plate is fixedly connected with a second motor for driving a crystallizer roller; and a baking oven fixed on the placing rack is arranged above the middle parts of the two motors II. According to the method, molten steel qualified in smelting is directly poured into the molten pool defined by the two crystallization rollers rotating oppositely and the side sealing plates through the large ladle, the tundish and the flow distribution system, the molten steel is cooled through the two crystallization rollers rotating oppositely to form the steel belt with the thickness of 1-5 mm, the production cost can be saved, the casting continuity is improved, the production efficiency is improved, and the yield is increased.

The invention provides a method for stably controlling the surface quality of a high-carbon steel continuous casting billet, which comprises the following steps: high-carbon steel refined molten steel is poured, and the superheat degree of a tundish of the high-carbon steel refined molten steel is 10-25 DEG C; casting powder is added after steel drawing; the pulling speed of the casting is 0.85 to 1.30 m / min; and the high-carbon steel continuous casting billet obtained through pouring is cooled. According to the method for stabilizing the surface quality of the high-carbon steel continuous casting billet, through optimization and adjustment of a production process and cooperation with special casting powder, process parameters such as the pulling speed, the superheat degree and the one-cooling-water slow cooling mode special for the high-carbon steel are formulated, the quality stability of the high-carbon steel is effectively improved, and the percent of pass of the casting billet is increased.

The invention relates to the technical field of continuous casting tundish metallurgy, in particular to a high-performance continuous casting tundish dry material forming method which comprises the following steps: crushing and grinding raw materials, and stirring and mixing according to a formula proportion to obtain candidate raw materials; the candidate raw materials are dried, and particle size distribution of the dried candidate raw materials is obtained; determining vibration parameters in the vibration process according to the particle size distribution, and performing vibration treatment; obtaining the volume density and apparent porosity of the vibrated candidate raw materials, and determining whether the compactness degree of the vibrated candidate raw materials meets a preset standard or not; if the compactness of the vibrated candidate raw materials meets the preset standard, baking control parameters in the baking process are determined based on the volume density and the apparent porosity; and baking treatment is carried out based on the determined baking control parameters, and cooling treatment is carried out after baking is completed, so that the formed tundish dry material is obtained. The strength of the tundish dry material can be guaranteed, and the forming efficiency is improved.

The invention discloses a method and system for keeping the liquid level of tundish molten steel in the automatic casting process of a casting machine, in the automatic casting state of the casting machine, the large ladle molten steel flows into a tundish through a large ladle nozzle, the tundish molten steel flows into a crystallizer through a tundish nozzle, and the opening degree Vz of the large ladle nozzle influences the flow Qz of the molten steel flowing into the tundish; the tundish nozzle opening Vm influences the flow Qm of the molten steel flowing into the crystallizer, the flow Qz of the molten steel flowing into the tundish and the flow Qm of the molten steel flowing into the crystallizer jointly determine the weight Wz of the molten steel in the tundish, the weight Wz of the molten steel in the tundish is kept within a certain range by controlling the large ladle nozzle opening Vz, and therefore the liquid level of the molten steel in the tundish is kept. According to the invention, the liquid level of the tundish molten steel is kept in a manner of controlling the opening degree of the ladle nozzle, and the consistency of each casting flow process parameter is ensured, so that the success rate of automatic casting of a casting machine is increased.

The utility model discloses a tundish dry material automatic feeding device which comprises a stock bin, a discharging channel is arranged at the bottom of one side of the stock bin, a partition plate, a screening funnel and a feeding hopper are sequentially arranged in the stock bin from top to bottom, the partition plate is fixedly connected with the inner wall of the stock bin, and the screening funnel and the feeding hopper are both movably connected with the inner wall of the stock bin. Bagged dry materials are placed in the stock bin, wall breaking treatment is conducted on the bagged dry materials through the material supplementing mechanism, the dry materials fall down from the strip-shaped holes after packaging bags are scratched, the materials are screened after being filtered through the screening funnel, residual impurities can be discharged from the cleaning opening, and the screened materials are conveyed into the discharging channel through the feeding hopper. The material guiding thin pipe and the spiral auger are used for controlling the downward sliding speed and flow of powder, the protective cover communicated with the output end of the conveying hose is matched to convey the material to the tundish, raised dust can be covered, flying dust is reduced, the material supplementing process is efficient, time and labor are saved, and safety is improved.

The invention discloses steel for a battery shell and a preparation method of the steel, and relates to the technical field of steel preparation. The preparation method of the steel for the battery shell comprises the steps of converter treatment, LF refining, RH refining and continuous casting. Starting from the whole preparation process, free oxygen and the production rhythm are controlled through LF refining, time production of RH refining and continuous casting is achieved, converter end point free oxygen control is coordinated, and generation of molten steel inclusions is reduced; rH refining is momentalized and standardized, continuous casting and casting are implemented in a steady state, and the amount of residual steel is controlled, so that secondary generation of inclusions and pollution to tundish molten steel are reduced. The steel for the battery case has the good characteristics of being good in ultra-deep drawing high-plasticity strain ratio, small in anisotropy, high in surface quality and internal purity, fine and uniform in microscopic grain structure and free of the sand hole defect, and is applied to the field of smelting of high-purity steel. The device is expected to be applied to continuous unmanned large-scale production of the highest-speed shell punching machine tool in the world, import substitution is achieved, and the product quality reaches the international advanced level.

The invention relates to the technical field of metallurgy, in particular to a production method for controlling the hydrogen content in high-carbon manganese steel. According to the method, the packaging specification of the metallurgical auxiliary materials is improved, and the field storage time and the water content of the metallurgical auxiliary materials, the temperature of terminal molten steel of an electric arc furnace, and the adding time and the adding sequence of all materials in the steel ladle pre-deoxidation, precipitation deoxidation and alloying procedures are controlled; in the LF refining process, foam white slag is rapidly formed, the thickness, the components and the retention time of the foam white slag are controlled, the silicon-calcium wire feeding time and the flow of soft blowing argon are controlled, the baking time and the baking temperature of a tundish are controlled in the continuous casting process, casting is protected in the whole process, the fluctuation range of the liquid level of a crystallizer is controlled, and the slow cooling time is prolonged. The hydrogen control mechanism and the hydrogen removal mechanism are closely linked with all the processes, the hydrogen content of the obtained casting blank is reduced to 4.5 ppm or below, air holes, cracks and other defects do not appear on the surface of the casting blank, and subsurface bubbles of 0.5 grade or above do not appear on the low magnification of the casting blank.

The invention belongs to the field of induction heating tundishes, and particularly provides a dual-purpose multi-strand continuous casting induction heating tundish device which comprises a heat-resisting inner cladding layer, an outer protection layer is arranged on the outer side of the heat-resisting inner cladding layer, and the heat-resisting inner cladding layer is connected to the inner side of the outer protection layer in a combined mode. A middle heating layer is formed between the outer protection layer and the heat-resistant inner cladding, casting ladle pipes which are connected in a sealed mode are arranged on the two sides of the middle of the inner bottom face of the heat-resistant inner cladding in a penetrating mode, and the bottoms of the casting ladle pipes extend to the position below the bottom face of the outer protection layer in a penetrating mode; according to the method, the air bricks on the inner bottom face of the tundish are comprehensively laid, a heat-resisting inner cladding layer in the tundish can be protected, the tundish is completely prevented from being eroded and damaged by molten metal, the service life of the tundish is prolonged, argon can be injected into all positions in the tundish through laying of the air bricks, and the service life of the tundish is prolonged. And the impurity removal efficiency and quality of the tundish on the internal molten metal are improved.

The invention discloses a method for improving the compactness of square steel for deep drawing, which adopts tundish induction heating and tundish temperature control within a reasonable range to ensure that the pulling speed is kept constant during casting and continuous casting at a lower degree of superheat, and adopts a continuous casting heavy pressure technology to improve the center porosity and shrinkage cavity of a casting blank; a BD cogging mill is adopted for large rolling reduction rolling, and the maximum single-pass rolling reduction is 100 mm; and isothermal operation is carried out in front of the fourth continuous rolling mill, only temperature measurement is needed, and the method is simple and easy to implement. According to the 154 mm deep drawing square steel produced through the technical scheme, the center porosity is smaller than or equal to 0.5 grade, the general porosity is 0 grade, the ingot segregation is 0 grade, and the residual shrinkage cavity is 0 grade, that is, no ingot segregation and residual shrinkage cavity exist, and ultrasonic flaw detection reaches A grade or above; and the high compactness requirement of the steel for deep drawing is met.

The invention provides tundish stuffing sand and a preparation method thereof, and belongs to the technical field of steelmaking continuous casting. The invention relates to tundish drainage sand, which is prepared from the following components in parts by weight: 40 to 60 parts of magnesite sand, 15 to 35 parts of dolomite sand, 10 to 30 parts of raw perlite, 5 to 15 parts of kyanite, 10 to 30 parts of rare earth mineral powder and a binder. The weight part of the rare earth mineral powder is 2-5, and the weight part of the binder is 1-3. The tundish stuffing sand is suitable for a stopper-free flow control pouring method, the automatic pouring rate is increased, and molten steel pollution is reduced.

The utility model discloses an argon bottom blowing device for improving the purity of molten steel. The argon bottom blowing device comprises a tundish, a water gap is formed in one side of the bottom face of the tundish, an electromagnetic stirrer is arranged on the outer side of the water gap, an air brick is arranged above the water gap in the tundish, and an argon conveying pipe is arranged at the bottom of the air brick. The gas permeable brick is arranged above the water gap, argon is blown into molten steel, the argon directly acts on molten steel flow, a gas curtain wall is formed around the water gap, floating and removal of inclusions are promoted, the purity of the molten steel is improved, the gas permeable brick is used in cooperation with the electromagnetic stirrer, the molten steel can be effectively stirred, a stirring blind area is eliminated, and the service life of the molten steel is prolonged. And the heat transmission of the molten steel in the tundish is more uniform. And moreover, the uniform molten steel flowing is beneficial to keeping the water gap unobstructed, and the water gap is prevented from being blocked by inclusions or cold steel in the molten steel.

The invention relates to the technical field of continuous casting of copper materials, in particular to high-quality copper material pouring equipment which comprises a driving frame and a horizontal continuous casting machine body, an alignment frame is arranged on the top face of the driving frame, and a pouring assembly for pouring molten copper liquid into the horizontal continuous casting machine body is arranged on the alignment frame. A connecting assembly used for moving the alignment frame is arranged between the driving frame and the alignment frame, and two sets of alignment assemblies used for accurately aligning the alignment frame and the horizontal continuous casting machine body are symmetrically arranged on the side face of the alignment frame. Two sets of positioning assemblies matched with the alignment assemblies are symmetrically arranged on the side face of the horizontal continuous casting machine body. By means of the linkage design of the positioning assembly and the alignment assembly, the position of the alignment frame can be automatically adjusted, the tundish and the horizontal continuous casting machine body are accurately aligned to the same horizontal position, it is ensured that a pouring nozzle is aligned to the center of a material opening, and the problem of molten copper splashing or uneven pouring caused by position deviation is solved.

The invention relates to a calcium carbide sensible heat utilization technology, in particular to a calcium carbide sensible heat utilization system based on continuous discharging. A calcium carbide sensible heat utilization system based on continuous discharging comprises a calcium carbide furnace, a tundish, a heat taking device and a plate crushing device, calcium carbide is connected with the tundish through a chute, and the tundish is connected with the heat taking device through a flow dividing groove; furnace gas enters the heat removal device after being subjected to heat exchange through the heat exchanger; the heat removing device comprises a heat removing furnace, a flow dividing groove and a heat removing roller way are arranged in the heat removing furnace, and a vertical flow dividing plate is arranged in the middle of the flow dividing groove, so that molten calcium carbide flowing out of the tundish is divided into multiple belt type molten calcium carbide flows; the heat removal roller way is connected with the plate crushing device; and the furnace gas subjected to heat exchange by the heat exchanger enters the upper and lower furnace wall positions at one end of the heat extraction furnace from the heat extraction pipeline, is discharged from the other end of the heat extraction furnace, and enters the recovery pipeline. The system is based on continuous discharging of molten calcium carbide, and the production efficiency can be greatly improved; meanwhile, calcium carbide sensible heat can be utilized in the whole stage, and the heat utilization efficiency is higher.

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 relates to a method for continuous casting of metal, in particular steel, wherein liquid metal is conducted from a movably mounted ladle (2) into a continuous casting tundish (3) by means of a shroud (4) and is conducted from the continuous casting tundish (3) into a casting mould (16) via an outlet (14), the continuous casting tundish (3) compensating for the interruptions when the ladles (2) are exchanged, and the ladles (2) being mounted in a movement device, wherein, to ensure a high separation efficiency for cast metal charges that follow one another, a singular rolling kind of flow is created in the continuous casting tundish (3), and the invention also relates to a fitting (22, 30) for the continuous casting tundish (3) and to a continuous casting plant (1) comprising the continuous casting tundish (3).

The invention relates to a square and round billet continuous casting device and a continuous casting method thereof. The device comprises a tundish, a crystallizer, a separation wall, a molten steel separation layer and a conveying module. The cavity of the tundish is divided into a first cavity body and a second cavity body by the partition wall, the first cavity body is used for bearing base body molten steel, and the second cavity body is used for bearing blank shell molten steel. The molten steel separation layer is arranged in the crystallizer, a spacing space is formed between the edge of the molten steel separation layer and the inner wall of the crystallizer, the molten steel separation layer is provided with a horizontal datum plane, and the horizontal datum plane is arranged in the spacing space. A blank shell casting space is arranged above the horizontal reference surface in the crystallizer; a matrix casting space is arranged below the horizontal reference surface in the crystallizer; at least part of the blank shell casting space and at least part of the base body casting space are located in the interval space. The conveying module comprises a first runner and a second runner; one end of the first runner is communicated with the first cavity and the matrix casting space; and one end of the second runner is communicated with the second cavity and the blank shell casting space, so that two kinds of molten steel are combined for forming.

The invention relates to a method for controlling the internal quality of a medium-carbon alloy steel continuous casting large round billet, which comprises the following steps of: 1) casting: casting by adopting a tundish integral crystallizer four-hole water gap with a downward water gap outlet angle of 15 degrees through tundish heat preservation and whole-course protection casting, immersing the water gap into a depth of 110-130mm below a meniscus of the crystallizer, and controlling the degree of superheat of a continuous casting tundish; 2) primary cooling: controlling the total water quantity of a crystallizer to be 4800-5300L / min, and controlling the water inlet and outlet temperature difference to be 3-7 DEG C; (3) secondary cooling is conducted, specifically, the secondary cooling specific water flow is controlled to range from 0.15 L / kg to 0.2 L / kg; 4) electromagnetic stirring of a crystallizer; (5) carrying out tail end electromagnetic stirring; (6) controlling the soft reduction of the fan-shaped section; and (7) slowly cooling the cast blank in a burial pit for more than 36 hours after the cast blank is poured, wherein the temperature in the burial pit is higher than 600 DEG C, and the temperature out of the burial pit is lower than 200 DEG C. The method has the advantages that central cracks and shrinkage cavities disappear, and the proportion of an equiaxed crystal area is increased.

The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking, and belongs to the technical field of refractory materials. The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking. The tundish magnesium-calcium dry material is prepared from the following raw materials in percentage by mass: 44-62.5% of magnesia aggregate, 22.5-24% of dolomite aggregate, 11-28% of magnesia fine powder and 3-5% of a binding agent, the binding agent is silica sol modified by a phosphate esterification aluminic acid ester coupling agent. The preparation method comprises the following specific steps: putting magnesia fine powder, a binding agent, magnesia aggregate and dolomite aggregate into a V-shaped mixing mill, uniformly stirring for 5 minutes, putting the stirred mixture into a mold, ramming, vibrating and molding to obtain a molded green body, curing at room temperature for 24 hours, demolding, drying at 200 DEG C for 24 hours, and carrying out heat treatment in an air atmosphere to obtain a dry material sample. According to the invention, the binding agent with good compatibility with a matrix is prepared by improving the binding agent, so that the binding agent can play a reinforcing role.

The invention discloses a tundish cover castable, and relates to the technical field of tundish refractory materials. The tundish cover castable is prepared from the following raw material components in percentage by mass: 7.8 to 9.6 percent of alumina of 8 to 5mm, 2.6 to 4.3 percent of alumina of 5 to 3mm, 2.6 to 4.3 percent of alumina of 1 to 0mm, 17.4 to 20.8 percent of alumina of 200 meshes, 9.6 to 13 percent of mullite of 5 to 3mm, 22.6 to 26 percent of mullite of 3 to 1mm, 9.6 to 13 percent of mullite of 1 to 0mm, 7 to 8.7 percent of mullite of 200 meshes, 2.6 to 3.5 percent of composite binding agent, 0.8 to 1.7 percent of aluminum silicate, 0.05 to 0.07 percent of SiC nanowire, 0.2 to 0.3 percent of aluminum titanate and the balance of water. The invention discloses a tundish cover castable which comprises the following components in percentage by weight: 0.4-0.7% of alumina micro powder, 0.08-0.11% of sodium tripolyphosphate, 2.6-3.5% of silica fume, 0.87% of steel fiber and 1.3-1.7% of high-alumina cement. Compared with a traditional process, the tundish cover castable has the advantages that the overall performance of the tundish cover castable is remarkably improved, the breaking strength and compression strength of the castable are effectively enhanced, the service life is remarkably prolonged, and the production cost is reduced. And the production cost is greatly saved, and the economical efficiency and the operation rate of continuous casting operation are improved.

The invention belongs to the technical field of cold forging steel manufacturing, and particularly discloses a production method of high-aluminum cold forging steel for medium-strength and high-strength standard parts, which comprises the following steps: controlling the slag alkalinity, the contents of C, S and P in molten steel, the tapping temperature, the thickness of a steel ladle slag layer and the tapping time during converter smelting; a deoxidizing agent, lime, low-carbon ferromanganese, silicon-manganese alloy, aluminum-iron alloy and a carburant are added, argon is blown into molten steel when calcium-iron wires are fed in an argon blowing station, components of a refining slag modifier are controlled to be added during LF refining, calcium carbide and the aluminum-iron alloy are added according to the oxygen content and the aluminum content in the molten steel, a tundish for continuous casting is protected by argon, and the molten steel is continuously cast. The thickness of a powder slag layer and the thickness of a liquid slag layer are controlled, a covering agent is added into the tundish, the purity of molten steel is increased by adjusting the whole process section, and therefore follow-up tundish nozzle nodulation is reduced, and the problem that in the prior art, due to the fact that the purity of molten steel is low, a high-aluminum cold heading steel casting continuous casting tundish nozzle is prone to nodulation is solved.

The invention belongs to the technical field of metallurgy, and provides a method for reducing erosion of a stopper rod in pure iron continuous casting production, which comprises the following steps of: blowing argon to seal a long nozzle bowl opening in a steel casting process, adding a covering agent to execute casting and adding twice in the process, and continuously injecting argon into a tundish impact area and a stopper rod area in the production process. A spinel stopper rod is adopted, and the outer diameter of the slag line part of the stopper rod is increased; by protecting the casting process design and optimizing the size and material of the stopper rod, the problem that the stopper rod is broken in the pure iron production process is solved, and stable and efficient continuous casting production of pure iron is achieved.

The invention provides an invar alloy and a rheoforming method thereof, and relates to the technical field of invar alloy production processes. The rheoforming method of the invar alloy comprises the following steps that alloy raw materials are sequentially subjected to smelting and tundish treatment, and alloy melt is obtained; the superheat degree of the melt is controlled, the alloy melt is subjected to thin-strip continuous casting, and a thin strip is obtained; and the thin strip is sequentially subjected to soaking treatment and rolling deformation, and an invar alloy product is obtained. The rheoforming technology is adopted, the invar alloy can be rapidly solidified, the surface of a casting strip is smooth and free of vibration marks, slag inclusion, flash and the like, segregation of inclusion elements to the grain boundary can be effectively restrained, and oxidation of the casting strip is reduced, so that the hot rolling procedure is shortened or even omitted, the problem of cracking in hot working is fundamentally avoided, the production efficiency and the yield are effectively improved, and the production cost is reduced. Therefore, energy consumption is reduced, production cycle is shortened, and production cost is reduced.

The invention discloses a hydraulic control system for a sliding gate of a tundish of a continuous casting machine, which relates to the technical field of hydraulic control systems and comprises an energy accumulator safety system and two oil cylinder control systems which are connected in parallel between an oil inlet main path and an oil return main path, the oil inlet main path is connected with an oil pump through a one-way valve; the energy accumulator safety system comprises an energy accumulator, a normally-open type high-pressure ball valve and an energy accumulator safety valve. The oil cylinder control oil way comprises a two-position four-way electromagnetic directional valve, a stacked type double-one-way throttle valve, a stacked type hydraulic control one-way valve, a first normally-closed type two-position two-way electromagnetic directional valve, a second normally-closed type two-position two-way electromagnetic directional valve and an oil cylinder. The hydraulic cylinder of the sliding nozzle can be stably controlled, and the energy accumulator safety system is arranged, so that the sliding nozzle can still be opened and closed for two to three times when an oil pump pauses in a sudden power failure state, and molten steel is prevented from being cooled and solidified.

The utility model relates to the technical field of steel casting, in particular to an argon blowing tundish for continuous casting of steel billets, which is characterized in that a first argon blowing pipe, a second argon blowing pipe and an argon guiding mechanism are further connected onto a cover plate, and the first argon blowing pipe and the second argon blowing pipe are respectively arranged on two sides of a blanking pipe. The argon gas guide mechanism can guide out argon gas filled from the first argon blowing pipe and the second argon blowing pipe; the bottom of the tank body is connected with a first connecting pipe and a second connecting pipe, the tank body is connected with the two crystallizers through the first connecting pipe and the second connecting pipe, the first connecting pipe and the second connecting pipe are arranged on the two sides of the tank body respectively, and fed argon can be rapidly guided out through an arranged argon guiding mechanism. And oxygen in the tundish can be rapidly exhausted through argon, and the exhaust speed is increased.

The invention relates to a method for controlling cracks of a steel casting blank for a new energy automobile battery pack. The method comprises the steps of casting blank composition control, casting powder performance control, crystallizer inlet and outlet water temperature control, submersed nozzle insertion depth control, molten steel superheat degree control, secondary cooling water distribution specific water flow control, crystallizer taper control and continuous casting machine equipment precision control. The steel comprises, by mass, 0.08%-0.11% of C, 0.55%-0.70% of Si, 2.40%-2.70% of Mn, smaller than or equal to 0.018% of P, smaller than or equal to 0.008% of S, 0.020%-0.070% of Als, 0.015%-0.035% of Nb, 0.02%-0.04% of Ti, 0.15%-0.35% of Cr, smaller than or equal to 0.006% of N and the balance Fe. The alkalinity R of the casting powder ranges from 1.30 to 1.42; 0.6 wt%-0.8 wt% of Li2O is added into the casting powder; when the water inlet temperature of the crystallizer is 25-30 DEG C, the wide surface water inlet and outlet temperature difference of the crystallizer is 2-5 DEG C, and the narrow surface water inlet and outlet temperature difference is 4-8 DEG C; when the water inlet temperature of the crystallizer is 31-36 DEG C, the water inlet and outlet temperature difference of the wide surface of the crystallizer is 4-7 DEG C, and the water inlet and outlet temperature difference of the narrow surface is 5-9 DEG C; constant-pulling-speed pouring is adopted for continuous casting, the tonnage of a tundish is 35-70 tons, and the liquid level fluctuation of a crystallizer is smaller than or equal to + / -5 mm. The defect of'black lines' on the surface of the strip steel of the battery pack for the new energy automobile can be effectively improved, and the surface quality of the battery pack for the new energy automobile is guaranteed.

The invention belongs to the technical field of steelmaking equipment, and discloses a novel steel wire rope self-lubricating device, a using method and application. The centering device can be coaxially and detachably connected with a water outlet of a continuous casting tundish and a water inlet of a crystallizer, and the device can be detachably connected with a steel wire rope. The device can be detachably connected with the steel wire rope, is convenient to mount and dismount, and is suitable for different working environments and steel wire rope specifications. Due to the detachable connection design of the supporting frame and the mandrel and the coaxial connection of the steel wire rope frame and the mandrel, the structural stability and reliability of the device are guaranteed. According to the method, the flow speed of the oil dripping needle tube and the falling position of oil drops can be controlled by adjusting the oil pressure and the maximum diameter between the oil leakage nozzle and the steel wire rope, and waste and pollution are avoided while the lubricating effect is ensured.

The invention belongs to the technical field of metallurgical continuous casting, and particularly relates to a nodulation and blockage prevention method suitable for a built-in water gap and a thin-wall water gap, a high-temperature-resistant stainless steel hoop is nested on the outer wall of the water gap during production of the water gap, and a high-temperature-resistant movable steel hoop with an adjustable support is matched with the high-temperature-resistant stainless steel hoop; during continuous casting field production, the high-temperature-resistant movable steel hoop is fixed above the crystallizer by the adjustable support on the high-temperature-resistant movable steel hoop; after the continuous casting platform is in place, the high-temperature-resistant movable steel hoop is clamped on the high-temperature-resistant stainless steel hoop of the water gap; conductive fire clay is coated between the high-temperature-resistant movable steel hoop and the high-temperature-resistant stainless steel hoop on the water gap; and connecting a lead, applying a positive electric field to the submersed nozzle, and applying a negative electric field to the tundish external electrode. The problem of nodulation and blockage of the water gap is effectively solved, the liquid level fluctuation qualification rate of the crystallizer is increased, large inclusions in a casting blank are reduced, and the quality of the casting blank is improved.

The invention relates to the field of metallurgy, in particular to a construction technology of a continuous casting tundish dry material and a tundish. According to the continuous casting tundish dry material construction technology, the thickness of a certain dry material is increased, the existing thickness of a tundish wall dry material is adjusted to be larger than or equal to 60 mm from 50-55 mm, and the thickness of a tundish bottom dry material is adjusted to be larger than or equal to 90 mm from 60 mm; meanwhile, the condition of the vibration process is adjusted, the original vibration time of 3 min is adjusted to be larger than or equal to 8 min, and vibration motors are changed into double motors; the baking conditions are adjusted, the baking time is shortened from original 70-90 min to 40-60 min, and the cooling and demolding time is prolonged to be larger than or equal to 4 h; by regulating and controlling the factors, the erosion resistance of the whole dry material is improved, and the service life of the dry material is further prolonged.