29 results about "Narrow face" patented technology

A flow field control device and method for a slab continuous casting crystallizer includes: a traveling wave magnetic field generator arranged on the upper part of both sides of the wide face of the slab continuous casting crystallizer, near the lower part of the molten steel meniscus to the upper edge of the submerged entry nozzle outlet, wherein the electromagnetic force generated by the traveling wave magnetic field generator is parallel to the wide face of the slab; DC static magnetic field generators are respectively arranged on the lower part of both sides of the wide face of the slab continuous casting crystallizer and on the molten steel streams on both sides of the submerged entry nozzle, wherein the two static magnetic field generators are perpendicular to the wide face of the slab and the magnetic field directions are opposite; several temperature measuring points and corresponding temperature measuring elements are arranged at intervals along the height direction on the two narrow face crystallizer copper plates of the slab continuous casting crystallizer, wherein at least one temperature measuring point on each of the two narrow face crystallizer copper plates is less than 100 mm away from the upper edge of the narrow face crystallizer copper plate; the distance from each temperature measuring point to the surface of the crystallizer copper plate is the same; and a controller, wherein the traveling wave magnetic field generator, the static magnetic field generator, and the temperature measuring elements are electrically connected to the controller.

The present application relates to coal mining method field, especially a kind of underground mining and filling integrated mining and filling working face interphase coal mining method.Firstly, transport roadway and air return roadway are excavated;Interval arrangement filling working face and longwall working face with suitable width;Then, advancing type stoping and filling of filling working face are carried out;After the stoping and filling of filling working face on both sides are completed, and transport crossheading and air return crossheading are left for longwall working face, longwall working face is mined by retreating type full caving method;Such mining is carried out for the whole mine seam.The present application uses narrow face for filling working face, and uses wide face for longwall working face, so that coal production demand, gangue production capacity and crossheading intensity demand are matched.Filling working face uses advancing type mining, and uses filling body to form crossheading and crossheading directly, which are used for retreating type mining of longwall working face, and the whole coal mining process almost does not need to excavate crossheading, and the crossheading intensity formed by filling body is large, which reduces support workload and can ensure safety.

The application discloses a method for protecting connecting roadways and large roadways by means of a handle type working face partitioned double-order fracturing, and belongs to the technical field of mine surrounding rock control. Target fracturing layer position and influence boundary are determined according to roof stratum structure, working face width and narrow conversion position and spatial relationship of connecting roadways and large roadways. In the working face wide face mining stage, when the distance between the working face mining line and the connecting roadway reaches the first advanced starting distance, the first fracturing borehole is arranged; in the working face narrow face mining stage, when the distance between the working face mining line and the large roadway reaches the second advanced starting distance, the inner side fan-shaped borehole and the outer side fracturing borehole facing the outside of the working face are arranged, the inner side and outer side fracturing boreholes are subjected to the second hydraulic fracturing, and a three-dimensional fracture network is formed. The boreholes with insufficient fracture closure, extension or non-connection are subjected to re-pressurization, and the two-stage fracturing effects are verified. The application can weaken the mining stress transmission in stages, reduces the deformation of the connecting roadway and the large roadway surrounding rock, and improves the roadway stability and the coal recovery rate.

The invention discloses a method and device for controlling the reverse taper of a continuous casting crystallizer. The method comprises the steps that the running state of a continuous casting machine and the steel type of a casting blank are obtained; according to the running state of the continuous casting machine and the steel type of the casting blank, the corresponding reverse taper of the narrow face of the crystallizer of the casting blank in different running states is determined; and controlling the operation of the crystallizer in the continuous casting machine according to the reverse taper of the narrow surface of the crystallizer. In this way, the situation that casting cannot be continued due to casting blank width defects and precision deviation caused by abnormal operation conditions such as casting starting, shutdown and casting speed reduction in the continuous casting process can be reduced, and the production quality of the casting blank is guaranteed.

The invention provides a method for overcoming the slab narrow face transverse crack defect and application. A method for overcoming slab narrow face transverse crack defects comprises the steps that S1, the taper coefficient of a crystallizer is set to be 1.20%-1.40% for positive peritectic steel with the carbon content being 0.08%-0.12%, S2, in the pouring process, the heat flux density of a wide face and the heat flux density of a narrow face are calculated based on the flow of cooling water of the wide face and the narrow face of the crystallizer and the water inlet and outlet temperature difference, and the ratio of the heat flux density to the heat flux density is controlled to be maintained to be 0.8-0.9; s3, the cast slab meeting the taper and the heat flux ratio is subjected to release rolling, the method for solving the slab narrow face transverse crack defect and the application mainly aim to overcome the defects that in the prior art, due to the fact that the defect is high in concealment and difficult to detect, the slab with the defect often flows into the rolling procedure and develops into a hot-rolled coil broken edge, and the defect cannot be detected easily. And the problems that the yield is reduced, the grinding cost is increased, and the hot charging rate is reduced are solved.

The invention provides a crystallizer narrow-face copper plate for improving casting blank quality, which relates to the technical field of crystallizers and comprises a copper plate body, a plurality of vertical grooves are arranged on the back of the copper plate body, a flat cooling cavity extending transversely is arranged at the top of the back of the copper plate body, the depth of the flat cooling cavity is larger than that of the vertical grooves, and the bottom of the flat cooling cavity is communicated with the upper ends of the vertical grooves. A step is arranged on the side wall of the flat cooling cavity and is covered and sealed by a pressing plate to form an independent sealed cooling groove; the pressing plate is provided with a notch corresponding to the top of the cavity to form a water outlet channel, and the edge of the pressing plate is further provided with a concave sealing groove with a sealing strip. Cooling water enters from the narrow-face water tank, flows through the vertical groove from bottom to top, then is converged into the flat cooling cavity to be mixed and equalized in pressure, and then flows out from the water outlet channel to form inverted-T-shaped circulation. The independent pressure equalizing buffer cavity is formed in the top of the copper plate, so that the cooling uniformity of a meniscus area is remarkably improved, uniform formation of an initial blank shell is effectively promoted, cracks on the surface of a casting blank are reduced, and the product quality and the production stability are improved.

The utility model discloses a narrow-face control arm precise bidirectional trimming tool which comprises an upper die and a lower die which are matched with each other, the lower die comprises a lower supporting block used for supporting the trimming position of a workpiece, a left cutter and a right cutter, the left cutter and the right cutter can be close to each other, and the upper die comprises a left drive and a right drive. The left drive and the right drive are matched with the left cutter and the right cutter correspondingly and used for driving the left cutter and the right cutter to get close to each other to achieve edge cutting of a workpiece. The upper surface of the lower supporting block is provided with a curved surface consistent with the lower surface of a workpiece in a profiling mode, and the left drive and the right drive are wedge-shaped pieces respectively. The precise bidirectional trimming tool for the narrow-face control arm comprises a left cutter and a right cutter which can be close to each other, and the two sides of a workpiece can be trimmed at the same time through the mutual approaching of the left cutter and the right cutter.

The utility model discloses a vertical lathe narrow face large workpiece clamping auxiliary tool in the technical field of workpiece lathe machining, which comprises a base, a fastening structure is arranged at one end of the base, a supporting structure is arranged at the other end of the base, and the fastening structure is matched with a locking groove arranged on a working platform. The lower portion of the fastening structure is inserted into the locking groove, the base is located on the working platform, the base is locked and fixed to the working platform through the fastening structure after the base moves to a designated position along the locking groove, and then the supporting structure can abut against the narrow face of the bottom of a workpiece and is matched with the clamping mechanism to clamp and fix the workpiece. And the narrow surface of the bottom of the workpiece can be supported and cannot exceed the range, so that contact with a turning tool is avoided, and the safety is high.

This invention belongs to the field of steel production technology and discloses an effective production method for controlling edge defects in hot-rolled high-strength steel. The process includes converter smelting → LF refining → continuous casting → soaking furnace heating → hot continuous rolling → cooling and coiling. Specifically: the LF refining process controls the nitrogen content in the molten steel to be ≤40ppm at the end point; the continuous casting uses a funnel-shaped crystallizer with a taper ratio of 1.1%~1.3%, and the narrow face taper is adjusted during casting to maintain the heat flux density of the narrow face at 55%~85% of the heat flux density of the wide face; the secondary cooling intensity is controlled to ensure that the corner temperature of the billet is >900℃ in the straightening zone; the soaking furnace heating temperature is ≥1150℃, and the time in the furnace is ≥30min; in the vertical roll fixed-width side pressing pass of hot continuous rolling, the rolling force of the vertical roll mill is controlled to be >300kN. This invention significantly reduces the incidence of edge quality defects such as edge cracks, burrs, and broken edges in high-manganese and high-titanium series high-strength steel by optimizing the steel composition, continuous casting, and hot rolling processes.

The utility model discloses a spiral duct convenient to install, which relates to the technical field of ventilation duct connection and comprises a spiral duct body, and an internal connection structure and an external connection structure are respectively arranged at two ends of the spiral duct body. The internal connection structure comprises a limiting rod and an arc-shaped sealing strip, the external connection structure is provided with a limiting groove and a wedging groove which are matched, and rapid butt joint is achieved through a hasp structure. The sealing structure comprises an air guide ring, an annular air bag and a one-way valve, and the contact pressure between the sealing ring and the narrow face end is dynamically controlled by adjusting the air pressure of the air bag to adapt to environment temperature changes. By means of the design, the problems that a traditional air pipe is complex in installation and nonadjustable in sealing are solved, and the advantages of efficient butt joint, double sealing and pressure self-adaption are achieved.

This invention discloses a high-manganese steel production apparatus for improving the quality of high-manganese steel, belonging to the field of steel production technology. The apparatus includes a casting furnace and a casting pipe. A pipe seat that mates with the casting pipe is provided at the casting furnace. The casting pipe is inclined downwards at an angle f. In this high-manganese steel production apparatus, the casting pipe is inclined downwards at an angle of 12°, compared to the previous 15° angle. This shortens the distance between the steel stream and the narrow copper plate of the crystallizer, and places it higher up. The time for the stream to reach the meniscus is shortened, and the steel flow is increased. The stream exiting the nozzle experiences a smaller temperature drop as it flows upwards to the meniscus after hitting the narrow face. This maintains a higher superheat at the meniscus, which is beneficial for promoting the stability of the slag layer, uniform heat transfer, and improving the surface quality of the slab. It also reduces the probability of adhesion and longitudinal cracks.

The utility model provides a device for measuring the abrasion loss of a narrow chamfered copper plate of a crystallizer, which relates to the technical field of continuous casting and comprises a positioning mechanism, a clamping mechanism and a measuring device. The positioning mechanism is a planar substrate with a guide clamping groove; the clamping device is mounted at the tail part of the planar base plate and is used for clamping the narrow-surface chamfering copper plate of the crystallizer placed in the guide clamping groove; and the measuring device is arranged at the side part of the planar substrate and is used for acquiring data for calculating the abrasion loss of the narrow-surface chamfered copper plate of the crystallizer. According to the utility model, the narrow-surface chamfered copper plate of the crystallizer is placed on the plane base of the positioning mechanism for positioning, and the positioning mechanism is placed on the measuring platform for use, so that the levelness and flatness of a detection surface are ensured, and the reliability of a measuring result is ensured; through base fixation of the universal rod and adjustment of the universal rod, flexible mobility of the dial indicator is ensured, it is ensured that the abrasion loss of each point of the copper plate can be measured, and the measurement accuracy of the dial indicator ensures the accuracy of a measurement result.

The invention relates to the technical field of slab continuous casting, in particular to a crystallizer foot roller for eliminating casting blank narrow face indentations, a crystallizer and a continuous casting machine. The invention provides a crystallizer foot roller for eliminating casting blank narrow surface indentations, which is characterized in that the crystallizer foot roller comprises a segmented roller and a plurality of flat rollers, the segmented roller and the plurality of flat rollers are arranged at intervals to form a casting blank bearing surface, the segmented roller is arranged at a casting blank outlet of a crystallizer, and the segmented roller comprises a first roller body and a second roller body, the first roller body and the second roller body are connected through a connecting shaft, and the edges of the ends, close to the connecting shaft, of the first roller body and the second roller body are arranged to be fillets. A curve transition section is arranged on the edge of a roller body of the flat roller, extends in the axial direction of the roller body and is smoothly connected with the end face of the roller body and a roller face. According to the technical scheme, sharp contact between the narrow-face blank shell and the edge of the foot roller can be reduced, the industrial problem of corner indentation of a small-chamfer crystallizer casting blank is solved, and quality improvement of the small-chamfer casting blank is facilitated.

The invention belongs to the technical field of railway steel, and particularly discloses a high-performance low-alarm-rate turnout rail and a production method thereof. The method comprises the following steps that S1, a rectangular square billet is smelted and cast; s2, the smelted and cast rectangular square billet is heated and rolled, in the rolling process, the wide face of the rectangular square billet is rolled into a rail head, and the narrow face of the rectangular square billet is rolled into a rail waist; s3, rolling waste heat is used for online heat treatment; and S4, straightening and processing the turnout rail subjected to online heat treatment to obtain the high-performance low-alarm-rate turnout rail. According to the scheme, by means of the turn-over rolling technology, original casting blank narrow face rolling is changed into rail head rolling and wide face rolling is changed into rail waist rolling, the rail waist metal amount is increased, the rail waist deformation amount is increased, the rail waist density is improved, the rail waist non-metallic inclusion distribution rule is changed, and therefore the rail waist alarm rate is reduced.

The present application relates to a kind of methods for removing inclusions and slag entrapment in steel in crystallizer, comprising S1, the outside of copper plate of the front and rear sides of crystallizer is provided with electromagnetic device;S2, after continuous casting and the molten steel state in crystallizer is stable, electromagnetic device is opened to the molten steel in crystallizer is treated, until pouring is finished;S3, after the cast blank is out of crystallizer, the surface of the front and rear sides of cast blank is treated or the cast blank is taken off line after skinning treatment is carried out.The present application is by the outside of the wide face of crystallizer is provided with electromagnetic device, in the continuous casting process of molten steel, using inclusion and the protective slag entrapment in molten steel flows in the process of flow due to friction and has electric charge, when charged particle moves in magnetic field, will receive the action characteristics of Lorentz force, promote inclusion and slag entrapment to the narrow face of crystallizer or the liquid protective slag on top gathers, again through the cast blank is out of crystallizer, the narrow face of cast blank is treated, finally obtains the cast blank of high quality of purity.

The invention discloses a method for judging the length of a mixed area of different steel grades under different conditions in the continuous casting and mixed pouring process, which comprises the following steps of: (1) acquiring the speed distribution of the narrow surface center line position of a continuous casting slab along the throwing direction based on a flow field numerical model in the continuous casting process; (2) determining minimum value points of the speed, determining the area length corresponding to the second minimum value point as the mixing area length corresponding to the surface position of the continuous casting slab, and determining the area length corresponding to the third minimum value point as the mixing area length corresponding to the center position of the continuous casting slab, the average value of the lengths of the mixing areas corresponding to the surface position and the center position of the continuous casting slab is determined as the length of the mixing area at the 1 / 4 position of the thickness direction of the continuous casting slab; and (3) calculating the length of the mixing area under different continuous casting process conditions according to the steps, and obtaining a calculation formula of the length of the mixing area under different conditions through a fitting method.

This invention belongs to the field of steelmaking continuous casting technology, and relates to an online diagnostic method for the crystallizer of a slab continuous casting machine. The method involves inspecting and measuring the crystallizer body during the casting interval. The diagnostic criteria are as follows: the corner gap of the crystallizer copper plate ≤ 0.3mm; the absolute value of the difference between the length of one side of the inner and outer arcs of the crystallizer copper plate and the standard length of one side of the inner and outer arcs of the crystallizer copper plate ≤ 1mm; the absolute value of the relative thickness difference between the inner and outer arcs and the left and right sides of the crystallizer copper plate ≤ 3mm; the wear value of the narrow face of the crystallizer copper plate ≤ 1mm; the straightness of the crystallizer copper plate ≤ 0.5mm; within 450mm of the top edge along the length direction of the crystallizer copper plate, each crack or scratch must be ≤ 3.0mm wide, ≤ 10mm long, and ≤ 0.5mm deep, with a number of cracks or scratches ≤ 2; outside this area, each crack or scratch must be ≤ 3.0mm wide, ≤ 50mm long, and ≤ 0.5mm deep, with a number of cracks or scratches ≤ 2; and the area of ​​plating cracks at the meniscus ≤ 30×30mm. 2 If the area of ​​coating peeling off at the meniscus is 0, it meets the diagnostic criteria and is considered qualified; otherwise, it is considered unqualified.

The invention relates to a device and method for regulating and controlling bias current in a crystallizer through electromagnetic braking, and belongs to the technical field of ferrous metallurgy continuous casting. The device comprises a regional electromagnetic braking device, a full-width two-section electromagnetic braking device, a liquid level wide-width nozzle local electromagnetic braking device and a narrow-width regional electromagnetic braking device, each electromagnetic braking device is composed of an iron core, a magnetic induction coil and a magnetic pole, a static magnetic field is applied to the wide face of a crystallizer, magnetic lines of force on the two sides of the submersed nozzle perpendicularly penetrate through the wide face of the crystallizer, and molten steel flowing is regulated and controlled; liquid level fluctuation and meniscus flow are inhibited, the impact depth of molten steel and the impact strength on a narrow surface are reduced, the problem of bias flow caused by nozzle nodulation is solved, the quality of a casting blank is improved, and smooth production is guaranteed; the method comprises the steps of monitoring a bias current phenomenon, selecting a proper device, and adjusting magnetic pole parameters to stabilize a flow field; the nozzle can effectively improve the flowing state of molten steel in the crystallizer, reduce slag entrapment and surface defects, prolong the service life of the nozzle, adapt to different nodulation degrees and pulling speed conditions, and have remarkable technical advantages and application prospects.

An electric contact element for use in a printed circuit board plug connector is formed with at least two opposing narrow faces and at least two opposing wide faces. At least one narrow face is designed to be used as a contact surface in order to be brought into an electrically conductive connection with a counter contact element. At least the contact surface of the contact element and of the counter contact element are designed to have identical structures, and the wide face has at least one rigid region and a flexible region.

The invention relates to a method for calculating and controlling the taper of a continuous casting slab widening and chamfering crystallizer, and belongs to the technical field of metallurgical continuous casting methods. According to the technical scheme, the arc length of the chamfering crystallizer is calculated; calculating the side length of the chamfering crystallizer; calculating the own taper of the narrow side of the crystallizer according to the arc length and the side length of the chamfering crystallizer; controlling and optimizing the narrow-surface guide device of the crystallizer; the taper of the narrow-face chamfering copper plate is set to be 1.3-3.0%, and the taper deviation range is smaller than or equal to 0.5 mm. The method has the beneficial effects that through taper calculation and stable control of the continuous casting slab widening and chamfering crystallizer, the process quality requirement for the taper precision of the narrow face of the crystallizer is well guaranteed, the phenomenon that the taper of the crystallizer exceeds the standard in the continuous casting process is effectively avoided, and production and quality hidden dangers in the continuous casting process are eliminated.

The invention relates to a method for the narrow-face covering of a panel element (1), in particular a furniture panel, wood material panels, worktops, chipboards, lightweight building panels, interior finishing panels, doors, fiber cement panels or the like, - wherein the narrow-surface covering is accomplished using edge-banding profiled elements (2) which have a base layer (3) made of B material, for example recycled material, characterized - in that the edge-banding profiled elements (2) have a width (B3, B4) which is smaller than the thickness D of the panel element (1), - in that at least one edge-banding profiled element (2) is first fastened to at least one of the narrow faces (15) in such a way that the panel element (1) protrudes at least on one side, such that at least one recess (7, 8) preferably of corner-shaped cross-section is formed, and - in that, thereafter or at the same time, the recess (7) or the recesses (7, 8) are filled, along the border of the panel element (1), with a second, preferably polymeric A material (A), preferably by means of a melting method. The invention also relates to a panel element produced by said method.

The embodiment of the application provides a method for preventing cracks in the corner of a peritectic steel slab, comprising using a right-angle crystallizer to produce a peritectic steel slab; wherein the depth of the water tank on the copper plate of the right-angle crystallizer is 11 mm; different water flow rates are distributed in the wide face and narrow face directions of the peritectic steel slab during primary cooling, and different water flow rates are distributed in the wide face and narrow face directions of the peritectic steel slab; during secondary cooling, nine cooling zones are divided, and different water distribution ratios are set for the corresponding cooling zones. In the technical scheme of the application, by means of the design of the wide face and narrow face cooling water tanks of the right-angle crystallizer, the design of the foot roller spraying, the optimization of the wide face and narrow face flow rate ratio of the primary cooling water, the optimization of the secondary cooling water, the optimization of the protective slag, the optimization of the drawing speed and temperature system and other measures, the problem that cracks are prone to occur in the corner of the peritectic steel slab when the right-angle crystallizer is used to produce the peritectic steel slab is solved.

The invention discloses a narrow-face foot roller which comprises a middle section and conical sections symmetrically connected to the two ends of the middle section. The conical section is of a variable-diameter structure, the large-diameter end of the conical section is connected with the middle section, and a roller shaft is arranged at the small-diameter end of the conical section. The radius of the middle section is 3-5 mm larger than the radius of the small-caliber end of the cone section. The length of the middle section is 1 / 4-1 / 3 of the total length of the narrow-face foot roller. The invention further discloses a crystallizer device which comprises a wide-face copper plate, a narrow-face copper plate, a wide-face foot roller, a narrow-face foot roller and a cooling nozzle assembly. The invention further discloses a casting blank sinking control method. The narrow-face foot roller has the beneficial effects that the narrow-face foot roller adopts the drum-shaped design that the middle part is wider than the side part, the uppermost first pair of narrow-face foot rollers can directly form an initial groove in a narrow-face blank shell of a casting blank, each pair of follow-up foot rollers tighten an angle towards the center of the wide face in the running direction of the casting blank, and the narrow-face foot rollers are pressed down gradually, so that the narrow-face foot rollers are prevented from being damaged. And the total depth of the groove is controlled after the casting blank is discharged from the foot roller section.

The utility model discloses a winding clamp of a winding machine, which comprises an installation seat, the installation seat is provided with a first sliding block and a second sliding block which can move relatively and an elastic piece enabling the first sliding block and the second sliding block to always have a trend of being far away from each other, and the first sliding block and the second sliding block are respectively provided with a first winding piece and a second winding piece. The first winding piece and the second winding piece are both in a flat plate shape, the first winding piece and the second winding piece are both provided with oppositely-arranged wide faces and oppositely-arranged narrow faces, the wide face of the first winding piece and the wide face of the second winding piece are located on the same plane, and the narrow face of the first winding piece and the narrow face of the second winding piece are oppositely arranged; the first winding piece and the second winding piece are designed to be in a flat plate shape, the inner diameter of the data line bundle is reduced, meanwhile, the contact area of the data line and the winding pieces is increased, and the wound data line bundle is more orderly.

The present invention relates to a method for coating the narrow face of a panel element, in particular of a furniture panel, wood material panel, worktop, chipboard, lightweight building panel, interior finishing panel, door, fiber cement panel or the like, wherein the coating of the narrow face is carried out by means of edge strip elements, the method being characterized in that: - firstly at least one edge strip element is fastened to at least one narrow face; - the panel element and the edge strip element are subjected to material-removing machining at least at one margin of said narrow face, so as to form at least one recess; - in the course of this material-removing machining, at least one long marginal side of the edge strip element fastened to said narrow face is at least partially removed; - the recess along the margin of the panel element is subsequently filled with a preferably polymeric material, preferably by means of a melting process; - such that said margin of the panel element can be shaped independently of the thickness of the edge strip element. The invention also relates to a panel element, in particular a furniture panel, worktop, chipboard, lightweight building panel, interior finishing panel, door, fiber cement panel or the like, having a thickness D and comprising at least one edge strip element which has, for example, a width B2 of 10 to 120 mm, preferably 15 to 100 mm.

The utility model discloses a tool for auxiliary measurement of composite profile surface film thickness, which comprises a test tool, a film thickness tester and a profile, the bottom of the test tool is provided with a groove matched with the profile, and the film thickness tester is placed on the test tool; a long groove is formed in the middle of the testing tool, the width of the long groove is larger than that of the probe, and the probe of the film thickness tester is located between the long grooves; the top of the testing tool is arranged to be in a concave shape, limiting grooves are formed in the positions, located on the two sides of the long groove, of the testing tool, the width of the limiting grooves is larger than that of idler wheels on a film thickness tester, a plurality of anti-slip strips are fixed to the limiting grooves, and the problem that the narrow face of a profile is inconvenient to detect is solved through the device.

This invention discloses an electromagnetic stirring method for adaptively adjusting the width of continuously cast slabs. The method comprises multiple independent stirring modules, each independently connected and disconnected. A displacement sensor is used on the outer side of the narrow face of the crystallizer to measure the position of the narrow face in real time, thereby calculating the current width of the continuously cast slab. The number of stirring modules connected is selected based on the measured width of the slab, ensuring that the effective area of ​​the electromagnetic stirrer covers the width of the slab. This invention also discloses an electromagnetic stirring device for adaptively adjusting the width of continuously cast slabs. This invention achieves better stirring results and promotes stable operation of continuous casting equipment, facilitating the stable production of high-quality slabs.

This invention discloses a method for rapid preparation of a thin slab continuous casting machine, comprising: sequentially stacking consumable parts, steel plates, and shear plates and binding them with tape to form a consumable parts assembly; assembling iron sheets to form a cold material iron sheet assembly with the same dimensions as the wide face of the crystallizer; after the dummy bar is inserted into place, installing the entire consumable parts assembly on the head of the dummy bar, keeping it centered and tightening the bolts; after the consumable parts assembly is installed, placing asbestos strips on the two long sides of the consumable parts assembly and fixing them with tape; after fixing the asbestos strips, opening the crystallizer and pulling down the dummy bar, closing the crystallizer and clamping it to compact the asbestos strips between the wide face of the crystallizer and the consumable parts; after the asbestos strips are clamped and sealed, sealing the gap between the consumable parts and the narrow face of the crystallizer with asbestos, and stacking the combined cold material on top; after the cold material is placed on the narrow face of the crystallizer, sequentially stacking the cold material iron sheet assembly between the width of the crystallizer and the cooling claw of the consumable parts, preparing for subsequent casting.

The invention relates to a method for overcoming the broken edge defect of high-aluminum high-strength steel, and belongs to the technical field of steel rolling. The method comprises the steps that a plate blank with target chemical components is obtained; the narrow face of the plate blank is subjected to machine cleaning treatment, so that defect inheritance is avoided, and a machine-cleaned plate blank is obtained; sequentially heating and rolling the machine-cleaned plate blank to obtain hot-rolled strip steel; and the hot-rolled strip steel is subjected to ultra-fast cooling and coiling in sequence, and a high-aluminum high-strength steel finished product is obtained. Through the comprehensive method of component optimization, slab machine cleaning and hot rolling process optimization, the technical problem of the broken edge defect of the high-aluminum high-strength steel is solved, through the combined action of the measures, the edge quality of the high-aluminum high-strength steel is effectively improved, and the requirement of downstream users for the high quality of strip steel products is met.