Method for predicting surface cleanliness of strip steel

Abstract

The invention discloses a strip steel surface cleanliness prediction method. The method comprises the steps that S1, field production data of a cleaning tank and an electrolytic tank of a cleaning section of a cold-rolled strip steel continuous annealing unit and the strip steel surface cleanliness before cleaning are collected; s2, calculating the influence coefficient of the cleaning tank on the surface cleanliness of the strip steel according to the cleaning conditions of the cleaning tank; s3, calculating the influence coefficient of the electrolytic cell on the surface cleanliness of the strip steel according to the cleaning condition of the electrolytic cell; s4, calculating a comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip steel; s5, calculating the cleaning capability of the cleaning tank and the electrolytic bath on the surface of the strip steel according to the comprehensive influence coefficient of the cleaning tank and the electrolytic bath on the surface cleanliness of the strip steel; and S6, calculating the cleanliness of the surface of the cleaned strip steel according to the cleaning capacity of the cleaning tank and the electrolytic tank on the surface of the strip steel. By means of the method, a data adjusting basis can be provided for band steel surface cleaning by band steel continuous annealing unit field staff, and the band steel surface quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous annealing of cold-rolled strip steel, and in particular relates to a method for predicting the surface cleanliness of strip steel. Background Art

[0002] In the continuous annealing process of cold-rolled strip, the cleaning section of the continuous annealing unit is a key link in the final production of cold-rolled strip products. The residual oil, residual iron and other impurities attached to the surface of the strip after cleaning will cause carbon stains to form on the strip during the annealing process, thereby polluting the furnace atmosphere, furnace rollers and strip surface, easily causing nodules on the furnace rollers, and surface defects such as pitting and roller marks on the strip surface, affecting the surface quality of the strip.

[0003] At present, the surface cleanliness of the strip in the cleaning section of the continuous annealing unit can only be obtained based on subsequent experimental observations. In actual production, the surface cleanliness of the strip is basically preliminarily evaluated by visual observation based on the cleaning conditions of the strip and production experience. This cannot effectively judge the specific conditions of the strip surface, and cannot effectively predict the surface cleanliness of the strip in production.

[0004] Therefore, it is urgent and important to propose a method for predicting the surface cleanliness of steel strip according to the existing cleaning process of the steel strip in the cleaning section of the continuous annealing unit. Summary of the invention

[0005] In order to solve at least one of the above technical problems, the present invention proposes a method for predicting the surface cleanliness of a steel strip.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides a method for predicting the surface cleanliness of a steel strip, comprising the following steps:

[0008] S1. Collect the on-site production data of the cleaning tank and electrolytic tank of the cold-rolled strip continuous annealing unit cleaning section and the surface cleanliness of the strip before cleaning;

[0009] S2. Calculate the influence coefficient of the cleaning tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank;

[0010] S3. Calculate the influence coefficient of the electrolytic cell on the surface cleanliness of the strip according to the cleaning conditions of the electrolytic cell;

[0011] S4. Calculate the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank and the cleaning conditions of the electrolytic tank;

[0012] S5. Calculate the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the strip according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip;

[0013] S6. Calculate the cleanliness of the strip surface after cleaning based on the cleaning capabilities of the cleaning tank and the electrolytic cell.

[0014] As a further improvement, in step S1, collecting the on-site production data of the cleaning section of the cold-rolled strip continuous annealing unit includes collecting the temperature of the medium in the cleaning tank and the electrolytic tank, the concentration of the medium and the central strip speed of the strip.

[0015] As a further improvement, in step S2, the influence coefficient of the cleaning tank on the surface cleanliness of the strip is calculated according to the cleaning conditions of the cleaning tank, and the formula is as follows:

[0016]

[0017] Among them, a 1 is the influence coefficient of the cleaning tank on the surface cleanliness of the strip steel, is the cleaning tank concentration influence coefficient, w 1 is the concentration of the cleaning tank medium, is the temperature influence coefficient of the cleaning tank medium, T 1 is the temperature of the cleaning tank medium, is the influence coefficient of the central belt speed of the strip in the cleaning tank, v 1 The central belt speed of the strip in the cleaning tank, It is the correction factor for the effect of the cleaning tank on cleanliness.

[0018] As a further improvement, in step S3, the influence coefficient of the electrolytic cell on the surface cleanliness of the strip is calculated according to the cleaning conditions of the electrolytic cell, and the formula is as follows:

[0019]

[0020] Among them, a 2 is the influence coefficient of the electrolytic cell on cleanliness, is the concentration influence coefficient of the electrolytic cell medium, w 2 is the concentration of the electrolytic cell medium, is the temperature influence coefficient of the electrolytic cell medium, T 2 is the temperature of the electrolytic cell medium, is the influence coefficient of the central strip speed in the electrolytic cell, v 2 is the central belt speed of the strip in the electrolytic cell, is the correction factor for the effect of the electrolytic cell on cleanliness.

[0021] As a further improvement, in step S4, the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip is calculated according to the cleaning conditions of the cleaning tank combined with the cleaning conditions of the electrolytic tank, and the formula is as follows:

[0022] a=a 1+a 2

[0023] Among them, a is the comprehensive influence coefficient of the cleaning tank and the electrolytic cell.

[0024] As a further improvement, in step S5, the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the strip is calculated according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip, and the formula is as follows:

[0025]

[0026] Among them, b is the cleaning ability of the cleaning tank and the electrolytic cell on the surface of the strip, e is a natural constant, and the superscript -a is the opposite of a.

[0027] As a further improvement, in step S6, the cleanliness of the strip surface after cleaning is further calculated according to the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface, and the formula is as follows:

[0028]

[0029] Among them, c is the cleanliness of the strip surface after cleaning, c b0 is the correction factor of the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface, c b1 is the influence coefficient of cleaning tank and electrolytic tank on the surface cleaning ability of strip steel, c z It is the comprehensive correction factor for the surface cleanliness of the strip steel in the cleaning tank and electrolytic cell.

[0030] As a further improvement, the cleanliness of the strip surface including the adaptability coefficient is calculated based on the cleanliness of the strip surface after cleaning and the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment.

[0031] As a further improvement, the surface cleanliness of the strip steel after cleaning is combined with the adaptability coefficient of the rolling oil and degreasing agent of the strip steel cold rolling to the environment, and the surface cleanliness of the strip steel including the adaptability coefficient is calculated as follows:

[0032]

[0033] Among them, c 1 is the surface cleanliness of the strip steel including the adaptability coefficient, γ is the adaptability coefficient of the rolling oil and degreasing agent of the strip steel cold rolling to the environment, c 0 The surface cleanliness before cleaning.

[0034] The present invention provides a method for predicting the surface cleanliness of a steel strip, comprising the following steps: S1, collecting on-site production data of a cleaning tank and an electrolytic tank in a cleaning section of a cold-rolled steel strip continuous annealing unit and the surface cleanliness of the steel strip before cleaning; S2, calculating the influence coefficient of the cleaning tank on the surface cleanliness of the steel strip according to the cleaning conditions of the cleaning tank; S3, calculating the influence coefficient of the electrolytic tank on the surface cleanliness of the steel strip according to the cleaning conditions of the electrolytic tank; S4, calculating the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the steel strip according to the cleaning conditions of the cleaning tank combined with the cleaning conditions of the electrolytic tank; S5, calculating the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the steel strip according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the steel strip; S6, calculating the cleanliness of the surface of the steel strip after cleaning according to the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the steel strip. The method of the present invention can predict the cleanliness of the strip surface in the cleaning section of a cold-rolled strip continuous annealing unit, so as to determine whether the cleanliness of the strip surface meets the technical indicators, provide data adjustment basis for the on-site staff of the strip continuous annealing unit to clean the strip surface, reduce the carbon stains on the strip surface and the nodules of the furnace rollers in the furnace caused by abnormal strip surface cleanliness, improve the strip surface quality, and improve the production efficiency of the cold-rolled strip continuous annealing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0036] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0038] Combination Figure 1 As shown, an embodiment of the present invention provides a method for predicting the surface cleanliness of a strip steel, comprising the following steps:

[0039] S1, collecting on-site production data of the cleaning tank and the electrolytic cell of the cleaning section of the cold-rolled strip continuous annealing unit and the surface cleanliness of the strip before cleaning. Preferably, collecting on-site production data of the cleaning section of the cold-rolled strip continuous annealing unit includes collecting the temperature of the medium in the cleaning tank and the electrolytic cell, the concentration of the medium and the central belt speed of the strip respectively;

[0040] S2. Calculate the influence coefficient of the cleaning tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank. The formula is as follows:

[0041]

[0042] Among them, a 1 is the influence coefficient of the cleaning tank on the surface cleanliness of the strip steel, is the cleaning tank concentration influence coefficient, w 1 is the concentration of the cleaning tank medium, is the temperature influence coefficient of the cleaning tank medium, T 1 is the temperature of the cleaning tank medium, is the influence coefficient of the central belt speed of the strip in the cleaning tank, v 1 The central belt speed of the strip in the cleaning tank, The correction factor for the effect of the cleaning tank on cleanliness;

[0043] S3. Calculate the influence coefficient of the electrolytic cell on the surface cleanliness of the strip according to the cleaning conditions of the electrolytic cell. The formula is as follows:

[0044]

[0045] Among them, a 2 is the influence coefficient of the electrolytic cell on cleanliness, is the concentration influence coefficient of the electrolytic cell medium, w 2 is the concentration of the electrolytic cell medium, is the temperature influence coefficient of the electrolytic cell medium, T 2 is the temperature of the electrolytic cell medium, is the influence coefficient of the central strip speed in the electrolytic cell, v 2 is the central belt speed of the strip in the electrolytic cell, is the correction factor for the effect of the electrolytic cell on cleanliness;

[0046] S4. Calculate the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank and the electrolytic tank. The formula is as follows:

[0047] a=a 1 +a 2

[0048] Among them, a is the comprehensive influence coefficient of the cleaning tank and the electrolytic cell;

[0049] S5. Calculate the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the strip according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip. The formula is as follows:

[0050]

[0051] Wherein, b is the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the strip steel, e is a natural constant, and the superscript -a is the opposite of a;

[0052] S6. Calculate the cleanliness of the strip surface after cleaning based on the cleaning ability of the cleaning tank and the electrolytic tank. The formula is as follows:

[0053]

[0054] Among them, c is the cleanliness of the strip surface after cleaning, c b0 is the correction factor of the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface, c b1 is the influence coefficient of cleaning tank and electrolytic tank on the surface cleaning ability of strip steel, c z It is the comprehensive correction factor for the surface cleanliness of the strip steel in the cleaning tank and electrolytic cell.

[0055] As a further preferred embodiment, the cleanliness of the strip surface after cleaning is combined with the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment, and the strip surface cleanliness including the adaptability coefficient is calculated, and the formula is as follows:

[0056]

[0057] Among them, c 1 is the surface cleanliness of the strip steel including the adaptability coefficient, γ is the adaptability coefficient of the rolling oil and degreasing agent of the strip steel cold rolling to the environment, c 0 The surface cleanliness before cleaning.

[0058] The method of the embodiment of the present invention can predict the cleanliness of the strip surface in the cleaning section of the cold-rolled strip continuous annealing unit, so as to determine whether the cleanliness of the strip surface meets the technical indicators, provide data adjustment basis for the on-site staff of the strip continuous annealing unit to clean the strip surface, reduce the carbon stains on the strip surface and the nodules of the furnace rollers in the furnace caused by abnormal strip surface cleanliness, improve the strip surface quality, and improve the production efficiency of the cold-rolled strip continuous annealing unit.

[0059] Embodiment (I) of the present invention is as follows:

[0060] S1. Collect the on-site production data of the cleaning section of the cold-rolled strip continuous annealing unit, including the medium temperature in the cleaning tank and the electrolytic tank, which are T 1 =41, T 2 =42, the medium concentrations in the cleaning tank and the electrolytic tank are w 1 =1.54, w 2 =2.03, the central belt speed of the strip in the cleaning tank and the electrolytic tank is v 1 =179, v 2 =179, the surface cleanliness of the strip before cleaning is c 0 =63;

[0061] S2. Calculate the influence coefficient a of the cleaning tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank 1 , where the cleaning tank concentration influence coefficient is Temperature influence coefficient of cleaning tank medium The influence factor of the central belt speed of the strip in the cleaning tank Correction factor for the effect of cleaning tank on cleanliness

[0062] After calculation:

[0063] a 1 =0.57w 1 +0.823T 1 -0.15446v 1 +0.0423=7.01476

[0064] S3. Calculate the influence coefficient a of the electrolytic cell on the surface cleanliness of the strip according to the cleaning conditions of the electrolytic cell 2 , where the concentration influence coefficient of the electrolytic cell medium is Temperature influence coefficient of electrolytic cell medium The influence coefficient of the central strip speed in the electrolytic cell Correction factor for the effect of electrolytic cell on cleanliness

[0065] After calculation:

[0066] a 2 =0.7614w 2 +1.2352T 2 -0.26482v 2 +0.0845=6.105762

[0067] S4. Calculate the comprehensive influence coefficient a of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank and the cleaning conditions of the electrolytic tank;

[0068] After calculation:

[0069] a=a 1 +a 2 =13.12052

[0070] S5. Calculate the cleaning ability b of the cleaning tank and the electrolytic tank on the surface of the strip according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip, wherein the natural constant e=2.71828;

[0071] After calculation:

[0072]

[0073] S6. Calculate the cleanliness c of the strip surface after cleaning based on the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface, where the correction coefficient c of the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface is b0 =0.384, the influence coefficient of cleaning tank and electrolytic tank on the cleaning ability of strip surface c b1 =0.76, comprehensive correction factor c of cleaning tank and electrolytic tank on strip surface cleanliness z =59.2;

[0074] After calculation:

[0075]

[0076] According to the cleanliness of the strip surface after cleaning and the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment, the strip surface cleanliness c including the adaptability coefficient is calculated. 1 :

[0077] After calculation:

[0078]

[0079] Embodiment (two) of the present invention is as follows:

[0080] like Figure 1 As shown, the present invention is a method for predicting the surface cleanliness of low-temperature alkali-washed strip steel, and the implementation steps are as follows.

[0081] S1. Collect the on-site production data of the cleaning section of the cold-rolled strip continuous annealing unit, including the medium temperature in the cleaning tank and the electrolytic tank, which are T 1 =40, T 2 =44, the medium concentrations in the cleaning tank and the electrolytic tank are w 1 =1.68, w 2 =2.12, the central belt speed of the strip in the cleaning tank and the electrolytic tank is v 1 =156, v 2 =156, the surface cleanliness of the strip before cleaning is c 0 =58;

[0082] S2. Calculate the influence coefficient a of the cleaning tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank 1 , where the cleaning tank concentration influence coefficient is Temperature influence coefficient of cleaning tank medium The influence factor of the central belt speed of the strip in the cleaning tank Correction factor for the effect of cleaning tank on cleanliness

[0083] After calculation:

[0084] a1 =0.57w 1 +0.823T 1 -0.15446v 1 +0.0423=9.82414

[0085] S3. Calculate the influence coefficient a of the electrolytic cell on the surface cleanliness of the strip according to the cleaning conditions of the electrolytic cell 2 , where the concentration influence coefficient of the electrolytic cell medium is Temperature influence coefficient of electrolytic cell medium The influence coefficient of the central strip speed in the electrolytic cell Correction factor for the effect of electrolytic cell on cleanliness

[0086] After calculation:

[0087] a 2 =0.7614w 2 +1.2352T 2 -0.26482v 2 +0.0845=14.7355

[0088] S4. Calculate the comprehensive influence coefficient a of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank and the cleaning conditions of the electrolytic tank;

[0089] After calculation:

[0090] a=a 1 +a 2 =24.55969

[0091] S5. Calculate the cleaning ability b of the cleaning tank and the electrolytic tank on the surface of the strip according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip, wherein the natural constant e=2.71828;

[0092] After calculation:

[0093]

[0094] S6. Calculate the cleanliness c of the strip surface after cleaning based on the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface, where the correction coefficient c of the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface is b0 =0.384, the influence coefficient of cleaning tank and electrolytic tank on the cleaning ability of strip surface c b1 =0.76, comprehensive correction factor c of cleaning tank and electrolytic tank on strip surface cleanliness z =59.2;

[0095] After calculation:

[0096]

[0097] According to the cleanliness of the strip surface after cleaning and the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment, the strip surface cleanliness c including the adaptability coefficient is calculated. 1 :

[0098] After calculation:

[0099]

[0100] Many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein, and therefore, they should not be construed as limiting the scope of protection of the present invention.

[0101] In summary, although the present invention lists the above-mentioned preferred embodiments, it should be noted that although technicians in this field can make various changes and modifications, unless such changes and modifications deviate from the scope of the present invention, they should be included in the protection scope of the present invention.

Claims

1. A method for predicting the surface cleanliness of a steel strip, characterized in that: The steps include: S1. Collect the on-site production data of the cleaning tank and electrolytic tank of the cold-rolled strip continuous annealing unit cleaning section and the surface cleanliness of the strip before cleaning; S2. Calculate the influence coefficient of the cleaning tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank; S3. Calculate the influence coefficient of the electrolytic cell on the surface cleanliness of the strip according to the cleaning conditions of the electrolytic cell; S4. Calculate the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip according to the cleaning conditions of the cleaning tank and the cleaning conditions of the electrolytic tank; S5. Calculate the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the strip according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip; S6. Calculate the cleanliness of the strip surface after cleaning based on the cleaning capabilities of the cleaning tank and the electrolytic cell.

2. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: In the step S1, collecting the on-site production data of the cleaning section of the cold-rolled strip continuous annealing unit includes collecting the temperature of the medium in the cleaning tank and the electrolytic tank, the concentration of the medium and the central strip speed of the strip.

3. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: In step S2, the influence coefficient of the cleaning tank on the surface cleanliness of the strip is calculated according to the cleaning conditions of the cleaning tank, and the formula is as follows: Among them, a1 is the influence coefficient of the cleaning tank on the surface cleanliness of the strip steel, is the cleaning tank concentration influence coefficient, w1 is the concentration of the cleaning tank medium, is the temperature influence coefficient of the cleaning tank medium, T1 is the temperature of the cleaning tank medium, is the influence coefficient of the central belt speed of the strip in the cleaning tank, v1 is the central belt speed of the strip in the cleaning tank, It is the correction factor for the effect of the cleaning tank on cleanliness.

4. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: In step S3, the influence coefficient of the electrolytic cell on the surface cleanliness of the strip is calculated according to the cleaning conditions of the electrolytic cell, and the formula is as follows: Among them, a2 is the influence coefficient of the electrolytic cell on cleanliness, is the concentration influence coefficient of the electrolytic cell medium, w2 is the concentration of the electrolytic cell medium, is the temperature influence coefficient of the electrolytic cell medium, T2 is the temperature of the electrolytic cell medium, is the influence coefficient of the central belt speed of the strip in the electrolytic cell, v2 is the central belt speed of the strip in the electrolytic cell, is the correction factor for the effect of the electrolytic cell on cleanliness.

5. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: In step S4, the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip is calculated according to the cleaning conditions of the cleaning tank and the cleaning conditions of the electrolytic tank, and the formula is as follows: a=a1+a2 Among them, a is the comprehensive influence coefficient of the cleaning tank and the electrolytic cell.

6. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: In step S5, the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the strip is calculated according to the comprehensive influence coefficient of the cleaning tank and the electrolytic tank on the surface cleanliness of the strip, and the formula is as follows: Among them, b is the cleaning ability of the cleaning tank and the electrolytic cell on the surface of the strip, e is a natural constant, and the superscript -a is the opposite of a.

7. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: In step S6, the cleanliness of the surface of the steel strip after cleaning is further calculated according to the cleaning ability of the cleaning tank and the electrolytic tank on the surface of the steel strip, and the formula is as follows: Among them, c is the cleanliness of the strip surface after cleaning, c b0 is the correction factor of the cleaning ability of the cleaning tank and the electrolytic tank on the strip surface, c b1 is the influence coefficient of cleaning tank and electrolytic tank on the surface cleaning ability of strip steel, c z It is the comprehensive correction factor for the surface cleanliness of the strip steel in the cleaning tank and electrolytic cell.

8. A method for predicting the surface cleanliness of a steel strip according to claim 1, characterized in that: According to the cleanliness of the strip surface after cleaning and the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment, the strip surface cleanliness including the adaptability coefficient is calculated.

9. A method for predicting the surface cleanliness of a steel strip according to claim 8, characterized in that: According to the cleanliness of the strip surface after cleaning and the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment, the strip surface cleanliness including the adaptability coefficient is calculated, and the formula is as follows: Among them, c1 is the surface cleanliness of the strip including the adaptability coefficient, γ is the adaptability coefficient of the rolling oil and degreasing agent of the strip cold rolling to the environment, and c0 is the surface cleanliness before cleaning.

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