Device and method for reducing probability of forming oil spots on surface of silicon steel

Abstract

The invention belongs to the field of strip steel rolling, and relates to a device and method for reducing the probability of forming oil spots on the surface of silicon steel. According to the technical scheme, the method comprises the steps that the surface temperature of a steel coil on a 1 # saddle of a continuous mill is obtained, the steel coil number, the rolling speed and the strip steel surface emulsion oil spot condition are recorded, a large amount of data statistics is conducted, and a tracking ledger of the steel coil, the temperature, the oil spot and the speed is established; and a linkage relation is established between the injection flow of the emulsion and air purging between the racks, so that the injection flow of the emulsion is in direct proportion to the air purging amount. And a laser temperature measuring gun is adopted to measure the temperature of the surface of the steel coil on the 1 # saddle of the continuous mill.

Description

Technical Field

[0001] The present invention belongs to the field of strip rolling, and relates to a device and method for reducing the probability of oil spot formation on the surface of silicon steel. Background Art

[0002] For a long time, the problem of emulsion oil spots has always been a difficult problem affecting the surface quality of cold tandem rolling products of silicon steel. By consulting a large number of relevant professional papers, the causes of emulsion oil spots can be roughly classified into the following categories: The oil spots on the surface of silicon steel are mainly composed of oxides of Fe, C, and Si, and contain a small amount of organic matter. These oil spots are formed during the rolling process. When the emulsion and iron powder adhere to the strip surface and undergo an electrochemical corrosion reaction with the strip surface at a rolling temperature above 100°C, finally, traces rich in oxides and containing a small amount of organic matter are formed.

[0003] The emulsion itself has weak anti-scar formation ability and insufficient lubrication performance, resulting in the rapid oxidation of the residual emulsion on the strip surface, and then forming scars. The emulsion is a composite mixture, consisting of two parts: base oil and additives. The base oil includes synthetic fat, animal oil, and mineral oil, while the additives include emulsifiers, oiliness agents, extreme pressure agents, and rust inhibitors and other components. The anti-scar ability of the emulsion is directly affected by the effect of antioxidants inside it.

[0004] The emulsion blowing system fails to fully meet the production requirements, manifested as the lack of a proportional relationship between the blowing pressure and the emulsion injection flow rate. Theoretically, an increase in the injection flow rate should be able to improve the blowing ability, but this enhancement effect is not infinite. Excessive increase may instead weaken the lubrication effect of the emulsion on the strip. Summary of the Invention

[0005] To overcome the defects in the above-mentioned related technologies, the present invention proposes a method for reducing the probability of oil spot formation on the surface of silicon steel, including: Obtain the surface temperature of the steel coil on the 1# saddle of the tandem mill, record the coil number, rolling speed, and the situation of emulsion oil spots on the strip surface, conduct a large amount of data statistics, and establish a tracking ledger for the steel coil, temperature, oil spots, and speed; Establish a linkage relationship between the injection flow rate of the emulsion and the air blowing between the stands, so that the injection flow rate of the emulsion is proportional to the air blowing volume.

[0006] Use a laser temperature measuring gun to measure the surface temperature of the steel coil on the 1# saddle of the tandem mill.

[0007] The present invention also provides a device for reducing the probability of oil spot formation on the surface of silicon steel, which is applicable to the above method for reducing the probability of oil spot formation on the surface of silicon steel. It is characterized in that the device for reducing the probability of oil spot formation on the surface of silicon steel includes: A microprocessor, electrically connected to the emulsion injection control unit of the tandem mill; An electric valve, which is arranged on the air outlet pipe of the air purging device between the stands, and the electric valve is electrically connected to the microprocessor.

[0008] The electric valve is an electric butterfly valve.

[0009] The beneficial effects of the present invention are as follows: The strip steel is prone to chemical reaction with the emulsion in a high-temperature environment. Traditionally, people mainly focus on the temperature of the emulsion, but it is often difficult to control the temperature of the emulsion in the stand. Therefore, we propose to start from the temperature of the finished steel coil, as a new standard for evaluating whether oil stains are likely to occur on the surface of the strip steel, and construct a closed-loop control system of the emulsion temperature in the oil tank - rolling mill speed - steel grade - steel coil temperature.

[0010] Meet the measurement accuracy requirements, meet the process requirements, and provide strong technical support for the production of silicon steel by the tandem mill.

[0011] This method adopts a low-cost design scheme, has high operating stability and accurate measurement. If it is promoted and used, it will save a large amount of equipment costs for the user units, conform to the principle of cost reduction and efficiency increase, and has great promotion value. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 It is the structural diagram of the present invention. Detailed Embodiments

[0014] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0016] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0017] As Figure 1 shown, the present invention provides a method for reducing the probability of oil spot formation on the surface of silicon steel, including: Obtain the surface temperature of the steel coil on the 1# saddle of the continuous rolling mill, record the coil number, rolling speed, and the situation of emulsion oil spots on the strip surface, conduct a large amount of data statistics, and establish a tracking ledger for the steel coil, temperature, oil spots, and speed; Establish a linkage relationship between the injection flow rate of the emulsion and the air purge between the stands, so that the injection flow rate of the emulsion is proportional to the air purge volume.

[0018] Use a laser temperature measuring gun to measure the surface temperature of the steel coil on the 1# saddle of the continuous rolling mill.

[0019] The present invention also provides a device for reducing the probability of oil spot formation on the surface of silicon steel, which is applicable to the above method for reducing the probability of oil spot formation on the surface of silicon steel. It is characterized in that the device for reducing the probability of oil spot formation on the surface of silicon steel includes: A microprocessor, electrically connected to the emulsion injection control unit of the continuous rolling mill; An electric valve, which is arranged on the air outlet pipe of the air purge device between the stands, and the electric valve is electrically connected to the microprocessor.

[0020] The electric valve is an electric butterfly valve. Linking the emulsion flow rate with the air purge valve can effectively reduce the removal of the emulsion on the strip surface to a certain level, prevent the generation of oil spots, and at the same time avoid too low emulsion content on the strip surface.

[0021] In the description of this specification, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0022] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for reducing the probability of oil stain formation on the surface of silicon steel, characterized in that, Including: Obtain the surface temperature of the steel coil on the saddle of the continuous rolling mill #1, record the coil number, rolling speed, and the situation of emulsion oil spots on the strip surface, conduct a large amount of data statistics, and establish a tracking ledger for the steel coil, temperature, oil spots, and speed; Establish a linkage relationship between the injection flow rate of the emulsion and the air purge between the stands, so that the injection flow rate of the emulsion is proportional to the air purge volume.

2. The method for reducing the probability of oil stain formation on the surface of silicon steel according to claim 1, characterized in that, Use a laser temperature gun to measure the surface temperature of the steel coil on the saddle of the continuous rolling mill #1.

3. An apparatus for reducing the probability of oil spot formation on the surface of silicon steel, applicable to the method for reducing the probability of oil spot formation on the surface of silicon steel described in the above-mentioned claims 1 and 2, characterized in that, The device for reducing the probability of oil spot formation on the surface of silicon steel includes: A microprocessor, electrically connected to the emulsion injection control unit of the continuous rolling mill; An electric valve, which is arranged on the air outlet pipe of the air purge device between the stands, and the electric valve is electrically connected to the microprocessor.

4. The device for reducing the probability of oil spot formation on the surface of silicon steel according to claim 3, characterized in that, The electric valve is an electric butterfly valve.

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