A water removal device for a beam blank continuous casting and a method of use

Abstract

The application discloses a water removing device for shaped blank continuous casting and a use method thereof. The water removing device comprises a water collecting tray, an included angle alpha between a bottom plate of the water collecting tray and a horizontal plane of the water collecting tray is 5-10 DEG, an included angle beta between a bottom plate of a gas guide box and the horizontal plane of the water collecting tray is 10-20 DEG, an upper portion of the water collecting tray is connected with a top plate, a front end of the top plate is connected with an air exhaust pipe, rear ends of left and right side plates of the water collecting tray are respectively connected with water pipes. The use method comprises the following steps: installing the water removing device in a region from a fan-shaped section end of a shaped blank continuous casting machine to a front end of a straightening and leveling machine; adjusting a height between the water removing device and a surface of the shaped blank; and determining a mounting point position of the water removing device. The application effectively solves the problem that, in the process of the shaped blank continuous casting, the secondary cooling water is accumulated and flows downward at a web plate of the shaped blank, thereby causing cracks of the cast blank, further optimizes a finished product rate of a product, and promotes improvement of production benefits of an enterprise.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metallurgy, and particularly relates to a water removal device for a conticaster and a use method. BACKGROUND

[0002] The production of H-shaped steel materials by using a conticaster can reduce rolling passes, shorten rolling time, save energy, and has small differences in various properties of the rolled materials and reliable product quality. Due to the shape characteristics of the conticaster, the inner arc side is a U-shaped groove, which causes the secondary cooling water to flow down along the web of the conticaster, resulting in overcooling of the web of the conticaster and a large amount of water accumulation at the web of the conticaster, which affects the flame cutting of the cast blank. At present, the method for solving this problem is to use a water blower to blow away the secondary cooling water when the cast blank exits the fan-shaped section, although the water blower can blow away most of the secondary cooling water, reduce the overcooling of the web of the conticaster, and enable the flame cutting operation to proceed normally. However, during the water blowing process, the secondary cooling water is blown to the top end of the flange of the conticaster, thereby causing the local overcooling of the surface of the top end of the flange of the conticaster and the appearance of "black spots", and in severe cases, causing cracks on the surface of the conticaster.

[0003] Chinese patent discloses "conticaster secondary cooling section cooling water blowing device and application method (patent number CN101367118B)", and specifically discloses the following content: the gas pipeline coincides with the vertical symmetry plane of the web, and is parallel to the surface of the web of the conticaster; the jet direction of the jet nozzle is towards the web indentation of the inner arc side of the conticaster.

[0004] The invention blows compressed air or other inert gas from the jet nozzle of the water blower to the water accumulation position of the web of the conticaster, reduces the amount of accumulated water, and uniformly distributes the accumulated water to the high temperature position of the cast blank, so that the surface temperature distribution of the conticaster is more uniform. However, since two nozzles are used for water blowing, the accumulated water on the surface of the web cannot be uniformly swept, and residual water cannot be completely swept away, and the splashed water will still fall on the top end of the flange, causing cracks on the cast blank and affecting the quality of the product. SUMMARY

[0005] I. Technical problems to be solved

[0006] The present application provides a water removal device for a conticaster and a use method, which aims to solve the problem of the accumulation and downward flow of secondary cooling water at the web of the conticaster during the conticasting process, thereby causing cracks on the cast blank.

[0007] II. Technical solutions

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions, and the water removal device of the present application comprises:

[0009] The angle α between the bottom plate of the water pan and the water pan horizontal plane is 5°-10°, the water pan horizontal plane is perpendicular to the back plate of the water pan; the outside of the bottom plate of the water pan is connected with the component of the dustpan shape to form a gas guide box with a rectangular air outlet, the angle β between the bottom plate of the gas guide box and the water pan horizontal plane is 10°-20°, and the back plate of the gas guide box is connected with the compressed gas input pipe; the upper part of the water pan is connected with the top plate, the front end of the top plate is connected with the air suction pipe, and the rear end of the left plate and the right plate of the water pan is connected with the drain pipe.

[0010] Further, the width d of the bottom plate of the water pan is 0.95f to 1.0f, wherein f is the width of the web of the shaped blank.

[0011] Further, the length e of the bottom plate of the water pan is 4h to 10h, wherein h is the height of the flange of the shaped blank.

[0012] Further, the length c of the drain pipe is 1.5g to 2.0g, wherein g is the width of the flange of the shaped blank.

[0013] Further, the width b of the rectangular air outlet of the gas guide box is 6mm to 10mm.

[0014] Further, the front end of the left plate and the right plate of the water pan is arc-shaped.

[0015] Further, the rear end of the air suction pipe is connected with the air suction machine, and the rear end of the compressed gas input pipe is connected with the air compressor.

[0016] As a use method of the application, the following specific steps are included:

[0017] 1) The water removal device of the application is installed in the area from the end of the fan-shaped section of the shaped blank continuous casting machine to the front end of the straightener;

[0018] 2) The rectangular air outlet of the water removal device is arranged relative to the running direction of the shaped blank, and the length direction of the rectangular air outlet is perpendicular to the running direction of the shaped blank;

[0019] 3) The height between the water removal device and the surface of the shaped blank is adjusted to keep the height between the rectangular air outlet of the water removal device and the surface of the web of the shaped blank within 3-20mm;

[0020] 4) The position of the installation point of the water removal device is determined to make the line of the radius of the fan-shaped section of the shaped blank continuous casting machine and the line of the length direction of the rectangular air outlet perpendicular and cross each other, and the water removal device is moved along the circular arc track of the fan-shaped section of the shaped blank continuous casting machine to keep the water pan horizontal plane horizontal and the angle γ between the water pan horizontal plane and the line of the radius of the fan-shaped section of the shaped blank continuous casting machine within 30°-60°;

[0021] 5) Introduce compressed air into the compressed gas inlet pipe of the water removal device and adjust the pressure to 0.6 MPa to 0.9 MPa;

[0022] 6) Turn on the exhaust fan to extract air.

[0023] Preferably, in step 1), when the water volume of the secondary cooling water is greater than 0.7 l / kg and the distance from the end of the sector of the beam blank continuous casting machine to the front end of the straightening machine is greater than 4 m, two water removal devices are installed.

[0024] 3. Beneficial Effects

[0025] The present invention provides a water removal device and a method for using the water removal device for the continuous casting of special-shaped billets, which effectively solves the problem that secondary cooling water accumulates and flows downward on the web of the special-shaped billets during the continuous casting process, thereby causing cracks in the billets, further optimizes the product yield, and promotes the improvement of the production efficiency of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the water removal device of the present invention.

[0027] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure after removing the top plate.

[0028] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure after removing the water tray.

[0029] Figure 4 It is a cross-sectional schematic diagram of the special-shaped blank.

[0030] Figure 5 It is a schematic diagram of the installation position of the water removal device of the present invention in the special-shaped blank continuous casting machine. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings to facilitate a clearer understanding for those skilled in the art.

[0032] Example 1

[0033] like Figure 4 As shown, the profiled blank 7 of the first embodiment is an H-shaped steel, and its cross-sectional dimensions are: width H is 900 mm, height B is 510 mm, web thickness T1 is 130 mm, and web width f is 320 mm. Calculation shows that: flange height h = (B-T1) / 2 = (510-130) / 2 = 190 mm, and flange width g = (Hf) / 2 = (900-320) / 2 = 290 mm.

[0034] As the water removal device of embodiment 1,Figure 1 、 Figure 2 、 Figure 3 As shown in FIG. 1, the device comprises: a dustpan-shaped water collecting tray 1, the width d of the bottom plate of the water collecting tray is 0.98*f=0.98*320mm=313.6mm, and is taken as 314mm, the length e of the bottom plate of the water collecting tray is 6.3*h=6.3*190mm=1197mm, and is taken as 1200mm; the horizontal plane H of the water collecting tray is perpendicular to the rear side plate 12 of the water collecting tray, the angle a between the bottom plate 11 of the water collecting tray and the horizontal plane of the water collecting tray is taken as 6°, so that the rear end of the bottom plate of the water collecting tray is appropriately inclined downward, to prevent the accumulated water in the water collecting tray from overflowing through the front end thereof, the front end of the left side plate of the water collecting tray and the front end of the right side plate of the water collecting tray are both arc-shaped, which is beneficial to better collecting the water mist generated in the water removing process; the outer side of the bottom plate of the water collecting tray is connected with a dustpan-shaped component, to form a gas guide box 2 with a rectangular gas outlet, the angle β between the bottom plate 21 of the gas guide box and the horizontal plane of the water collecting tray is taken as 15°, so that the gas in the rectangular gas outlet of the gas guide box forms a suitable angle with the surface of the beam blank, to improve the water removing effect, the width b of the rectangular gas outlet of the gas guide box is 8mm, and the appropriate width of the gas outlet is beneficial to improving the flow rate of the airflow; the rear side plate 22 of the gas guide box is connected with a compressed gas input pipe 3; the upper part of the water collecting tray is connected with a top plate 4, the front end of the top plate is connected with an air suction pipe 5, the rear end of the left side plate 13 of the water collecting tray and the rear end of the right side plate 14 of the water collecting tray are respectively connected with a drain pipe 6, the length c of the drain pipe is 1.8*g=1.8*290mm=522mm, and is taken as 520mm, so that the accumulated water discharged by the drain pipe is far away from the outer side surface of the beam blank flange; the rear end of the air suction pipe is connected with an air suction machine, and the rear end of the compressed gas input pipe is connected with an air compressor.

[0035] As the use method of the embodiment one of the present application, the following specific steps are included:

[0036] 1) The water removing device is installed in the area S1 from the end of the fan-shaped section of the beam blank continuous casting machine to the front end of the straightening machine (as shown in FIG. 2); Figure 5

[0037] 2) The rectangular gas outlet of the water removing device is relative to the running direction of the beam blank 7, and the length direction of the rectangular gas outlet is perpendicular to the running direction of the beam blank;

[0038] 3) The height between the water removing device and the surface of the beam blank is adjusted, so that the height between the rectangular gas outlet of the water removing device and the surface of the web plate of the beam blank is kept at 10mm;

[0039] ​4) Determine the installation point of the water removal device, the radius of the segment of the continuous caster of the first embodiment is 12 m, the line connecting the radius R of the segment of the beam blank continuous caster is perpendicular to the line connecting the length direction of the rectangular air outlet, the water removal device is moved along the circular arc track of the segment of the beam blank continuous caster, the water pan horizontal plane H is kept horizontal and the included angle γ between the water pan horizontal plane H and the line connecting the radius of the segment of the beam blank continuous caster is 45°, thereby determining the specific installation point of the water removal device;

[0040] 5) Compressed air is introduced into the compressed gas input pipe of the water removal device, and the pressure is adjusted to 0.6 MPa;

[0041] 6) Start the air extractor to perform air extraction.

[0042] The specific installation point of the water removal device is determined.

[0043] The water removal device is installed at the specific installation point.

[0044] Example Two

[0045] As shown in Figure 4 , the beam blank 7 of the second embodiment is also an H-shaped steel, the cross-sectional size of which is: the width H is 1030 mm, the height B is 440 mm, the web thickness T1 is 130 mm, and the web width f is 550 mm; it is calculated that the flange height h = (B-T1) / 2 = (440-130) / 2 = 155 mm, and the flange width g = (H-f) / 2 = (1030-550) / 2 = 240 mm.

[0046] The structure of the water removal device of the second embodiment is the same as that of the first embodiment, but due to the different size of the beam blank, the size of the water removal device is changed, as shown in Figure 1 、 Figure 2 、 Figure 3 , the water pan bottom plate width d = 0.98*f = d = 0.98*550 = 539 mm, and d = 540 mm is taken; the water pan bottom plate length e = 8.4*h = 8.4*155 = 1302 mm, and e = 1300 mm is taken; the included angle α between the water pan bottom plate 11 and the water pan horizontal plane is 6°, the included angle β between the air guide box bottom plate 21 and the water pan horizontal plane is 14°, the width b of the rectangular air outlet of the air guide box is 8 mm, and the drain pipe length c = 1.8*g = 1.8*240 mm = 432 mm.

[0047] As the use method of the second embodiment of the present application, the steps are the same as those of the first embodiment, and when the parameters are changed as follows: the height of the rectangular gas outlet of the water removal device from the surface of the web of the beam blank is kept at 8 mm; the radius of the segment of the continuous casting machine in this second embodiment is still 12 m, the horizontal plane H of the water pan is kept horizontal, and the included angle γ between the line connecting the horizontal plane H of the water pan and the radius of the segment of the continuous casting machine is 50°, so as to determine the position of the specific installation point of the water removal device; the pressure of the compressed air introduced into the compressed gas input pipe of the water removal device is adjusted to 0.8 MPa; the specific water quantity of the secondary cooling water in this second embodiment is 0.60 L / kg, which is less than 0.7 l / kg, so only one water removal device needs to be installed.

[0048] Use effect: for the production of one casting 10 furnaces of low-temperature-resistant steel, there is no water flow on the inner arc web of the beam blank at the rear end of the water removal device, and there is no "black spot" phenomenon at the top end of the flange, the surface quality of the beam blank is good, and no transverse cracks are found.

[0049] Embodiment three

[0050] As shown in Figure 4 , the beam blank 7 in this third embodiment is also an H-shaped steel, and the cross-sectional size is: the width H is 1300 mm, the height B is 510 mm, the web thickness T1 is 140 mm, and the web width f is 620 mm; it is calculated that: the flange height h = (B-T1) / 2 = (510-140) / 2 = 185 mm, and the flange width g = (H-f) / 2 = (1300-620) / 2 = 340 mm.

[0051] The structure of the water removal device in this third embodiment is the same as that in the first embodiment, but due to the different size of the beam blank, the size of the water removal device is changed, as shown in Figure 1 、 Figure 2 、 Figure 3 , the width d of the bottom plate of the water pan is d = 0.98*f = d = 0.98*620 = 607.6 mm, and 608 mm is taken; the length e of the bottom plate of the water pan is e = 7.5*h = 7.5*185 = 1387.5 mm, and 1400 mm is taken; the included angle α between the bottom plate 11 of the water pan and the horizontal plane of the water pan is 7°, the included angle β between the bottom plate 21 of the gas guide box and the horizontal plane of the water pan is 13°, the width b of the rectangular gas outlet of the gas guide box is 8 mm, the length c of the drain pipe is c = 1.7*g = 1.7*340 mm = 578 mm, and 580 mm is taken.

[0052] As the use method of the third embodiment of the present application, the steps are the same as those of the first embodiment, and when the parameters are changed as follows: the height of the rectangular gas outlet of the water removal device from the surface of the web of the beam blank is kept at 9 mm; the radius of the segment of the continuous casting machine in the third embodiment is still 12 m, the horizontal plane H of the water pan is kept horizontal, and the included angle γ between the connecting line of the horizontal plane H and the radius of the segment of the beam blank continuous casting machine is 53°, so as to determine the position of the specific installation point of the water removal device; the pressure of the compressed air in the compressed gas input pipe of the water removal device is adjusted to 0.9 MPa; the specific water content of the secondary cooling water in the third embodiment is 0.68 L / kg, which is less than 0.7 L / kg, so only one water removal device needs to be installed.

[0053] Use effect: 8 heats of weathering steel are produced in one pouring, no water flow appears on the inner arc web of the beam blank at the rear end of the water removal device, no "black spot" phenomenon appears at the top of the flange, a small amount of very fine transverse cracks are found on the surface of the beam blank, the transverse crack index is 0.1 piece / m, and this defect disappears after the beam blank comes out of the heating furnace when rolling, which has no effect on rolling.

[0054] The water removal device for beam blank continuous casting and the use method thereof effectively solve the problem that the secondary cooling water accumulates and flows down at the web of the beam blank during the continuous casting of the beam blank, so as to cause cracks in the beam blank, further optimize the yield of the product, and promote the improvement of the production efficiency of the enterprise.

[0055] The present application is not limited to the above specific embodiments, and various improvements to the technical solutions of the present application made by those skilled in the art according to the concept of the present application shall fall within the scope of the present application.

Claims

1. A water removal device for continuous casting of special-shaped blanks, characterized by: The invention comprises a dustpan-shaped water receiving tray (1), wherein the angle α between the bottom plate (11) of the water receiving tray and the horizontal plane of the water receiving tray is 5°-10°, and the horizontal plane of the water receiving tray is perpendicular to the rear side plate (12) of the water receiving tray; the outer side of the bottom plate of the water receiving tray is connected to a dustpan-shaped component to form an air guide box (2) with a rectangular air outlet, wherein the angle β between the bottom plate (21) of the air guide box and the horizontal plane of the water receiving tray is 10°-20°, and the rear side plate (22) of the air guide box is connected to a compressed gas input pipe (3); the upper part of the water receiving tray is connected to a top plate (4), and the top plate is The front end is connected to the exhaust pipe (5), and the rear ends of the left side plate (13) and the right side plate (14) of the water receiving tray are respectively connected to the drain pipe (6); the width d of the bottom plate of the water receiving tray is 0.95f to 1.0f, wherein f is the width of the web of the profiled blank (7); the length e of the bottom plate of the water receiving tray is 4h to 10h, wherein h is the height of the flange of the profiled blank; the length c of the drain pipe is 1.5g to 2.0g, wherein g is the width of the flange of the profiled blank; the width b of the rectangular air outlet of the air guide box is 6mm to 10mm.

2. The water removal device according to claim 1, characterized in that: The front ends of the left side plate and the right side plate of the water receiving tray are both arc-shaped.

3. The water removal device according to claim 2, characterized in that: The rear end of the exhaust pipe is connected to the exhaust fan, and the rear end of the compressed gas input pipe is connected to the air compressor.

4. A method for using the water removal device according to any one of claims 1 to 3, characterized in that: The specific steps include: 1) Install the water removal device in the area between the end of the sector of the beam blank continuous casting machine and the front end of the straightening machine; 2) the rectangular air outlet of the water removal device is relative to the moving direction of the shaped blank (7), and the length direction of the rectangular air outlet is perpendicular to the moving direction of the shaped blank; 3) Adjust the height between the dewatering device and the surface of the profiled blank so that the height between the rectangular air outlet of the dewatering device and the surface of the profiled blank web is maintained between 3 and 20 mm; 4) Determine the installation point of the water removal device so that the line connecting the radius of the beam blank continuous casting machine segment intersects perpendicularly with the line connecting the length direction of the rectangular air outlet. Move the water removal device along the arc trajectory of the beam blank continuous casting machine segment so that the horizontal surface of the water receiving tray remains horizontal and the angle γ between it and the line connecting the radius of the beam blank continuous casting machine segment is 30°~60°; 5) Introduce compressed air into the compressed gas inlet pipe of the water removal device and adjust the pressure to 0.6 MPa to 0.9 MPa; 6) Turn on the exhaust fan to extract air.

5. The method for using the water removal device according to claim 4, characterized in that: In the step 1), when the water volume of the secondary cooling water is greater than 0.7 l / kg and the distance from the end of the sector of the beam blank continuous casting machine to the front end of the straightening machine is greater than 4 m, two water removal devices are installed.

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