A slab continuous casting mould seal preform and method of use thereof

Abstract

The application discloses a slab continuous casting crystallizer sealing prefabricated part and a use method thereof, which comprises a corner sealing piece, an outer piece and a dovetail groove sealing piece; the corner sealing piece is arranged at a corner position on the outer side of a dummy head; the outer piece is arranged at a length direction position on the outer side of the dummy head; and the dovetail groove sealing piece is arranged at a width direction position on the outer side of the dummy head. The application simplifies operation, reduces operation labor intensity, ensures sealing effect, effectively prevents open pouring and steel leakage, dummy failure and abnormality in the dummy process caused by sealing, and better considers the pollution of sealing material to a casting machine and controls sealing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to continuous casting sealing process technology, more particularly to a slab continuous casting mold sealing preform and a method of using the same. BACKGROUND

[0002] When the continuous casting machine is started, in order to solve the problem of automatic breakout of the dummy bar head and leakage of molten steel during starting, the sealing preform is improved on the basis of the original continuous casting mold sealing scheme, and the application of spring rings and other cooling materials is added subsequently. The basic operation mode has not changed, that is, the dummy bar head is prepared, the mold is inspected and prepared, and then the dummy bar rod is inserted into position. Two people in each flow perform sealing operation. The subsequent basic steps are to first align the dummy bar head, place the fiber sealing strip between the mold and the dummy bar head, tamp, place the protective material, place the cooling material, and add iron filings, etc. The whole sealing process has high labor intensity and high standardization requirement, and is also a difficulty in the current continuous casting automation operation process.

[0003] The existing mold sealing operation: after the dummy bar rod is inserted into position, two people in each flow perform sealing operation. The basic steps are to first align the dummy bar head, manually cut the preformed fiber sealing strip, estimate the size, place it in the gap around the mold and the dummy bar head, and then tamp in turn. Due to the length and size error caused by manual cutting of the sealing strip, waste and multiple cutting occur. Subsequently, the protective material is placed, the cooling material is placed, and the iron filings are added.

[0004] Poor mold sealing can easily lead to leakage of molten steel during starting, breakout failure, separation of the dummy bar head and the head of the cast slab, etc. The materials used for sealing, including the sealing strip and iron filings, partially fall off during starting, causing pollution to the inside of the caster. Although most of the fallen iron filings are washed away by the secondary cooling water, a part of them can cause pollution to the nozzle. The fallen sealing strip stays in the gap between the rollers for a long time, affecting the secondary cooling effect of the nozzle. SUMMARY

[0005] In view of the above-mentioned defects in the prior art, the purpose of the present application is to provide a slab continuous casting mold sealing preform and a method of using the same, which simplifies the operation, reduces the labor intensity of the operation, ensures the sealing effect, effectively prevents leakage of molten steel during starting, breakout failure and abnormality during the dummy bar process due to sealing, and better considers the pollution of the sealing material to the caster and controls the sealing cost.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The present application provides a slab continuous casting mold sealing preform in the first aspect, which comprises a corner sealing piece, an outer piece and a dovetail groove sealing piece.

[0008] The corner sealing piece is arranged at the corner position outside the dummy bar head.

[0009] The outer part is arranged at the length direction position outside the dummy head;

[0010] The dovetail groove seal is arranged at the width direction position outside the dummy head.

[0011] Preferably, the corner seal comprises two short side prefabricated plates.

[0012] The two short side prefabricated plates form a right angle structure shape.

[0013] The inner side surface of the two short side prefabricated plates is provided with a first insertion plate.

[0014] Preferably, the first insertion plates are at the same height.

[0015] Preferably, the outer part comprises a long part prefabricated plate and a second insertion plate arranged at the inner side surface of the long part prefabricated plate.

[0016] Preferably, the dovetail groove seal comprises a short part prefabricated plate and a third insertion plate arranged at the inner side surface of the short part prefabricated plate.

[0017] Preferably, the third insertion plate is arranged as a horizontal plate or an inclined plate.

[0018] Preferably, the corner seal, the outer part and the dovetail groove seal are made of tinplate.

[0019] Preferably, the thickness of the corner seal, the outer part and the dovetail groove seal is between 0.5-2mm.

[0020] The second aspect of the present application provides a use method of the slab continuous casting mold sealing prefabricated part.

[0021] The corner seal is arranged at the corner position outside the dummy head, the outer part is arranged at the length direction position outside the dummy head, and the dovetail groove seal is arranged at the width direction position outside the dummy head.

[0022] The reinforcing rib and the cooling material are added, and the iron nail scrap and the spring are scattered at the edge part to complete the sealing work.

[0023] Preferably, the thickness of the iron nail scrap is between 1-5cm.

[0024] The slab continuous casting mold sealing prefabricated part and the use method thereof provided by the present application greatly improve the measures, solve the influence and pollution hazards of the original fiber seal on the secondary cooling water nozzle, ensure the safety factor of the continuous casting machine starting pouring, and reduce the manual operation strength. Through the improvement, the progress of the automatic sealing of the continuous casting machine is greatly promoted, and the effects of multiple progress of the continuous casting machine sealing are achieved. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the corner seal in the pre-fabricated sealing component for the slab continuous casting crystallizer of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the outer component in the sealing prefabricated part of the slab continuous casting crystallizer of the present invention;

[0027] Figure 3 This is a schematic diagram of the dovetail groove seal in the pre-fabricated sealing component of the slab continuous casting crystallizer of the present invention. (a) is a horizontal plate and (b) is an inclined plate.

[0028] Figure 4 This is a schematic diagram illustrating the method of using the sealing prefabricated component for the slab continuous casting crystallizer of the present invention. Detailed Implementation

[0029] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Combination Figures 1 to 3 As shown, the present invention provides a pre-fabricated sealing component for a slab continuous casting crystallizer, comprising a corner seal 1, an outer component 2, and a dovetail groove seal 3.

[0031] The corner seal 1 is located at the corner position on the outside of the spindle head 100.

[0032] The outer part 2 is located at a length position outside the spindle head 100.

[0033] The dovetail groove seal 3 is located on the outer side of the spindle head 100 in the width direction.

[0034] The corner seal 1 includes two short-side prefabricated plates 101.

[0035] Two short-side precast slabs 101 are connected on one side to form a right-angled structural shape.

[0036] The inner sides of the two short-side precast slabs 101 are each provided with a first insertion plate 102. The first insertion plates 102 are located at the same height and are connected to form a right-angle structure.

[0037] The outer component 2 includes a long prefabricated plate 201 and a second insert plate 202 disposed on the inner side of the long prefabricated plate 201.

[0038] The dovetail groove seal 3 includes a short prefabricated plate 301 and a third insert plate 302 disposed on the inner side of the short prefabricated plate 301.

[0039] The third insertion plate 302 is set to be a horizontal plate or an inclined plate.

[0040] The corner seal 1, the outer piece 2 and the dovetail groove seal 3 are made of tinplate material and are stamped to quickly and effectively seal the crystallizer.

[0041] The tinplate material is used to replace the sealing strip to protect the surface of the dummy head 100, the sealing prefabricated part can be customized or made by the present self-made mode (with the corresponding mold equipment), and the corner wrapping effect is also considered. The thickness of the corner seal 1, the outer piece 2 and the dovetail groove seal 3 is between 0.5-2mm, the depth of the gap between the dummy head 100 and the copper plate is kept at 10-15cm, the part higher than the upper part of the dummy head 100 is greater than 30cm, and the width of the folded and placed part at the edge of the dummy head 100 is different according to different positions (the dovetail groove part is relatively special).

[0042] The application also provides a use method of the slab continuous casting crystallizer sealing prefabricated part.

[0043] The corner seal 1 is arranged at the corner position outside the dummy head 100, the outer piece 2 is arranged at the length position outside the dummy head 100, and the dovetail groove seal 3 is arranged at the width position outside the dummy head 100, thereby playing a sealing role.

[0044] The reinforcing ribs and the cooling material are further added, and the iron nail scraps and the springs are scattered at the edge to complete the sealing work.

[0045] The tinplate material is used as the main sealing material of the crystallizer, 1-2cm thick iron nail scraps are scattered at the folded position (corner) of the prefabricated part, the iron nail scraps are used to prevent the prefabricated part from being directly damaged by the pouring molten steel and entering the gap between the crystallizer copper plate and the dummy head to cause abnormal pouring resistance. Finally, the integrated tension rib and the cooling block (the whole cooling part) are placed above the dovetail groove.

[0046] Tinplate characteristics:

[0047] Sealing property: the tinplate is used as the sealing raw material for the gap between the dummy head and the crystallizer, and can replace the sealing strip to play a sealing role.

[0048] Plasticity: the tinplate has high formability and ductility, and has high plasticity as the prefabricated part.

[0049] Metal property: the problem that the sealing strip is burned, diffused, pollutes the environment and blocks the nozzle after being heated in the original casting can be avoided.

[0050] Corrosion resistance: the surface is plated with a layer of tin, has the characteristics of corrosion resistance and non-toxicity, reduces the opportunity of oxidation of ingredients, and has the reduction effect of tin.

[0051] Recyclability: tinplate can be recycled as a reusable piece after being used as a sealing piece, and can be repeatedly used after reshaping, so the recycling value is high.

[0052] The prefabricated piece made around the dummy head and the dovetail groove is reserved with a middle gap part, and long and short pieces are replaced, and the corner piece can be uniformly made.

[0053] For the prefabricated piece, the alternative scheme is to make it on site, take the four corners of the crystallizer as the prefabricated piece, and adjust the length at the inner and outer arc ends, and stamp it.

[0054] By using the metal properties of tinplate, the pine fiber sealing strip used in the past is replaced and put between the crystallizer and the dummy head, so that the pollution of the fiber strip to the secondary cooling water nozzle is solved, and the leakage accident caused by the contact between the dummy head and the molten steel can be effectively prevented. In addition, the step of manually making and pressing the fiber strip can be saved, and the method of just putting it in can effectively reduce the intensity of manual operation and provide a certain cushion for future automation process.

[0055] The present application first redefines the optimization scheme of the sealing material of the continuous casting machine in the industry, and the theoretical basis is mature. And it plays a crucial role in the automatic sealing system of the continuous casting machine, and has high application value for similar continuous casting machine use occasions. It can be popularized and used in domestic steel enterprises, and has very broad application prospect.

[0056] Those skilled in the art in this technical field should realize that the above embodiments are only used to illustrate the present application, and are not used as a limitation on the present application, as long as the changes and modifications of the above described embodiments are within the scope of the spirit of the present application.

Claims

1. A method of using a slab continuous casting mould sealing preform, characterized in that: The slab continuous casting crystallizer sealing prefabricated part comprises a corner sealing part, an outer part and a dovetail groove sealing part; The corner sealing part is arranged at a corner position outside the dummy head; The outer part is arranged at a length direction position outside the dummy head; The dovetail groove sealing part is arranged at a width direction position outside the dummy head, The corner sealing part comprises two short edge prefabricated plates; The two short edge prefabricated plates form a right angle structure shape; First insertion plates are arranged on the inner sides of the two short edge prefabricated plates, The first insertion plates are at the same height, The outer part comprises a long part prefabricated plate and a second insertion plate arranged on the inner side of the long part prefabricated plate, The dovetail groove sealing part comprises a short part prefabricated plate and a third insertion plate arranged on the inner side of the short part prefabricated plate, The third insertion plate is arranged as an inclined plate, The use method is: arranging the corner sealing part at a corner position outside the dummy head, arranging the outer part at a length direction position outside the dummy head and arranging the dovetail groove sealing part at a width direction position outside the dummy head; adding reinforcing ribs and cooling materials and adding iron nail scraps and springs at the edge part to complete the sealing work.

2. Use of a slab continuous casting mould sealing preform according to claim 1, characterized in that: The corner sealing part, the outer part and the dovetail groove sealing part are all made of tinplate materials.

3. A method of using a slab continuous casting mould sealing preform according to claim 2, characterized in that: The thickness of the corner sealing part, the outer part and the dovetail groove sealing part is between 0.5 and 2 mm.

4. The method of using a slab continuous caster mould sealing preform according to claim 1, characterised in that: The thickness of the iron nail scraps is between 1 and 2 cm.

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