Method for preventing copper plate from clamping steel during online width adjustment of chamfering crystallizer

Abstract

The invention provides a method for preventing steel from being clamped by copper plates during online width adjustment of a chamfering crystallizer, the chamfering crystallizer comprises two wide-surface copper plates and two narrow-surface copper plates, and the method specifically comprises the following steps: (1) cold-state slag removal: adjusting the width between the two wide-surface copper plates to the maximum, then, accumulated slag or residual steel in the wide-face copper plates, the narrow-face copper plates and gaps between the wide-face copper plates and the narrow-face copper plates is cleaned through a high-pressure water gun; (2) sealing before casting: before casting, sealing gaps 3 between the two ends of the narrow-surface copper plate and the wide-surface copper plate by using sealant; and (3) width adjustment times: controlling the online width adjustment times of the chamfering crystallizer to be less than or equal to 7 times. According to the technical scheme, the problem that steel is clamped due to the fact that slag is easily accumulated on a copper plate during width adjustment of the chamfering crystallizer is solved.

Description

Technical Field

[0001] The invention relates to the technical field of steelmaking, and in particular to a method for preventing copper plates from clamping steel when a chamfered crystallizer is adjusted in width online. Background Art

[0002] Since the contact area between the wide and narrow surfaces of the chamfered crystallizer is large, slag is more easily trapped on the contact surface during use, causing the gap between the wide and narrow surfaces to exceed the standard; at the same time, there is more slag accumulated on the wide copper plate that has not passed steel, which is not a big problem when adjusted to a narrower direction, but it is easy to cause steel clamping, leading to cracks or even steel leakage accidents when adjusted to a wider direction. Therefore, it is urgent to propose a method that can reduce the problem of steel clamping caused by slag accumulation on the copper plate of the crystallizer. Summary of the invention

[0003] According to the above, the problem of steel clamping caused by copper plate slag accumulation is prone to occur when the chamfering crystallizer is adjusted in width, and a method for preventing the copper plate from clamping the steel when the chamfering crystallizer is adjusted in width online is provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A method for preventing copper plates from clamping steel when a chamfering crystallizer is adjusted in width online, wherein the chamfering crystallizer comprises two wide copper plates and two narrow copper plates, and the method specifically comprises the following contents:

[0006] (1) Cold slag removal: adjust the width between the two wide copper plates to the maximum, and then use a high-pressure water gun to clean the slag or residual steel in the wide copper plate, the narrow copper plate, and the gap between the wide copper plate and the narrow copper plate;

[0007] (2) Sealing before pouring: Before pouring, seal the gap 3 between the two ends of the narrow copper plate and the wide copper plate with a sealing paste;

[0008] (3) Width adjustment times: Control the online width adjustment times of the chamfering crystallizer to ≤ 7 times.

[0009] Furthermore, the water outlet pressure of the high-pressure water gun is controlled at 10Mpa.

[0010] Furthermore, in (2), the gap between the narrow copper plate and the wide copper plate within 300 mm from the upper opening of the chamfered crystallizer is sealed with a sealing paste.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The method provided by the present invention for preventing copper plate from clamping steel when the chamfering crystallizer is adjusted in width online can effectively reduce corner cracks and steel leakage accidents caused by corner clamping when the chamfering crystallizer is adjusted in width online, and reduces the degradation of corner longitudinal cracks in the hot rolling process.

[0013] Based on the above reasons, the present invention can be widely promoted in the field of steelmaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the chamfered crystallizer according to the present invention.

[0016] In the figure: 1. Wide copper plate; 2. Narrow copper plate; 3. Gap. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1

[0019] Aiming at the problem of steel clamping caused by slag accumulation in the copper plate of the chamfered crystallizer during use, the present invention provides a method for preventing the copper plate from clamping the steel when the width of the chamfered crystallizer is adjusted online, wherein the chamfered crystallizer comprises two wide copper plates 1 and two narrow copper plates 2, wherein the two narrow copper plates 2 are located between the two wide copper plates 1; a concave structure formed by a central plane and chamfered surfaces located on both sides of the plane is provided on one side of the narrow copper plate 2, and a chamfer is formed between the chamfered surface and the plane; the method specifically comprises the following contents:

[0020] (1) Cold slag removal: In the automatic width adjustment mode of the chamfering crystallizer, adjust the width between the two wide copper plates 1 to the maximum, and then use a high-pressure water gun to clean the wide copper plate 1, the narrow copper plate 2, and the slag or residual steel in the gap 3 between the wide copper plate 1 and the narrow copper plate 2;

[0021] (2) Sealing before pouring: Figure 1 As shown, before pouring, the gap 3 between the two ends of the narrow copper plate 2 and the wide copper plate 1 is sealed with a sealing paste;

[0022] (3) Width adjustment times: Control the online width adjustment times of the chamfering crystallizer to ≤ 7 times.

[0023] Furthermore, the water outlet pressure of the high-pressure water gun is controlled at 10Mpa.

[0024] Furthermore, in (2), the gap 3 between the narrow copper plate 2 and the wide copper plate 1 within 300 mm from the upper opening of the chamfered crystallizer is sealed with a sealing paste.

[0025] The chamfering crystallizer with automatic width adjustment function belongs to the prior art, and the present invention will not repeat it. The method provided by the present invention to prevent the copper plate from clamping the steel when the chamfering crystallizer is adjusted online can effectively reduce the corner cracks and steel leakage accidents caused by the corner clamping when the chamfering crystallizer is adjusted online, and reduce the degradation of the corner longitudinal cracks in the hot rolling process.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preventing copper plates from clamping steel when a chamfering mold is adjusted in width online, wherein the chamfering mold comprises two wide copper plates and two narrow copper plates, and is characterized in that: The method specifically includes the following contents: (1) Cold slag removal: adjust the width between the two wide copper plates to the maximum, and then use a high-pressure water gun to clean the slag or residual steel in the wide copper plate, the narrow copper plate, and the gap between the wide copper plate and the narrow copper plate; (2) Sealing before pouring: Before pouring, seal the gap 3 between the two ends of the narrow copper plate and the wide copper plate with a sealing paste; (3) Width adjustment times: Control the online width adjustment times of the chamfering crystallizer to ≤ 7 times.

2. The method for preventing copper plate from clamping steel when the chamfered crystallizer is adjusted in width online according to claim 1, characterized in that: The water outlet pressure of the high-pressure water gun is controlled at 10Mpa.

3. The method for preventing copper plate from clamping steel when the chamfered crystallizer is adjusted in width online according to claim 1, characterized in that: In (2), the gap between the narrow copper plate and the wide copper plate within 300 mm from the upper opening of the chamfered crystallizer is sealed with sealing paste.

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