Method for calculating ton steel consumption of insulating coating liquid for oriented silicon steel

Abstract

The invention belongs to the technical field of insulating paint, and particularly relates to a method for calculating ton steel consumption of insulating coating liquid for oriented silicon steel. The calculation method comprises the following steps: measuring the radius r of the circulating tank and detecting the specific gravity gamma 1 of circulating coating liquid; the oriented silicon steel coil is coated, and the initial liquid level height h0 and the final liquid level height ht of a circulation tank are obtained; the total mass m1 of added water and the rising amount delta h of the liquid level height caused by liquid supplementing in the coating process are obtained; and calculating the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil, the mass M of the insulating coating liquid and the consumption V of the insulating coating liquid per ton of steel. According to the calculation method, the consumption condition of the insulating coating liquid of each roll of oriented silicon steel can be accurately evaluated, so that timely guidance is provided for production; the self-influence of specific gravity change, water adding, liquid supplementing, a stirring paddle in a circulating tank, a liquid level meter and the like is eliminated, so that the ton consumption calculation is as accurate as possible.

Description

Technical Field

[0001] The invention belongs to the technical field of insulating coatings, and in particular relates to a method for calculating the consumption per ton of steel of insulating coating liquid for oriented silicon steel. Background Art

[0002] Oriented silicon steel is a silicon-containing magnetic steel material that is often used to make transformer cores. Considering the performance and quality of transformer cores, oriented silicon steel is required to take into account iron loss, magnetic induction, coating adhesion performance and surface insulation performance.

[0003] There are many production processes for oriented silicon steel, with a narrow production window and great production difficulty. During the production process, an insulating coating liquid is applied to the surface, and then dried and sintered to form an insulating layer on the surface. This insulating layer can provide good insulation performance for oriented silicon steel. However, the more insulating coating liquid is used, the better. On the one hand, the more insulating coating liquid is used, the greater the production cost will be. On the other hand, the more insulating coating liquid is used, the thicker the insulating coating will be. When making the iron core, the proportion of non-magnetic conductive materials will be higher, resulting in a decrease in magnetic properties. Therefore, the amount of insulating coating liquid must be controlled.

[0004] Due to the high production speed of oriented silicon steel and the many process parameters, there is no accurate method for calculating the consumption of coating liquid in the prior art. Generally, the amount of coating liquid consumed per ton of steel is calculated by counting how many rolls of oriented silicon steel are produced over a long period of time and how many sets of insulating coating liquid are consumed. In actual production, some rolls of oriented silicon steel produced during this period may have high consumption of insulating coating liquid, while some rolls may have low consumption. The final average result is stable, that is, this method cannot accurately represent the consumption of coating liquid per roll of oriented silicon steel. Summary of the invention

[0005] The present invention aims to solve the above-mentioned problem and provides a method for calculating the consumption of insulating coating liquid for oriented silicon steel per ton of steel. By analyzing, recording and calculating the online liquid level and combining it with the weight of each roll of oriented silicon steel product, the problem of the existing calculation method having a long time span and being unable to accurately represent the consumption of coating liquid for each roll of oriented silicon steel is overcome.

[0006] According to the technical solution of the present invention, the method for calculating the consumption of insulating coating liquid per ton of steel for oriented silicon steel comprises the following steps:

[0007] S1: Detecting the specific gravity γ1 of the circulating coating liquid, wherein the circulating coating liquid is prepared by adding water to the insulating coating liquid, and the circulation path of the circulating coating liquid includes a circulation tank, a liquid infusion pipe, a coating liquid tank and a reflux pipe;

[0008] S2: Measure the radius r of the circulation tank, in m;

[0009] S3: coating the oriented silicon steel coil, obtaining the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating t , where h0 and h t The unit is m;

[0010] S4: Obtaining the coating process of the oriented silicon steel coil in step S3:

[0011] The sum of the mass of water added to adjust the specific gravity of the circulating coating liquid is m1, in kg;

[0012] The total increase in the liquid level in the circulation tank caused by replenishing the circulating coating liquid is Δh, in meters;

[0013] S5: Calculate the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil according to formula (I):

[0014] M0=(3.14*(ra)^2*(h0-h t +Δh)+m1 / 1000)*γ1*1000*b(I);

[0015] Wherein, a is the correction coefficient of the circulation tank radius, the value range is 0.002-0.005, and the unit is m;

[0016] b is the coating tank correction coefficient, ranging from 0.9 to 1.1;

[0017] S6: Calculate the mass M of the insulating coating liquid consumed by the oriented silicon steel coil according to the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil, the specific gravity γ0 of the insulating coating liquid, and the specific gravity γ1 of the circulating coating liquid;

[0018] S7: Calculate the consumption V of insulating coating liquid per ton of steel according to the mass M of insulating coating liquid consumed by the oriented silicon steel coil and the mass m0 of the oriented silicon steel coil, wherein the unit of m0 is t;

[0019] The order of steps S1, S2 and S3-S4 is not limited.

[0020] Furthermore, a liquid level measuring device is installed in the circulation tank, and the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating are obtained by the installed liquid level measuring device. t And the total increase Δh of the liquid level in the circulation tank caused by replenishing the circulating coating liquid.

[0021] Furthermore, the liquid level measuring device may be a liquid level meter.

[0022] Further, the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating are obtained. tAnd before the total increase Δh of the liquid level in the circulation tank caused by replenishing the circulating coating liquid, the stirring paddle in the circulation tank is closed in advance to keep the liquid level in the circulation tank horizontal.

[0023] Furthermore, the stirring paddle in the circulation tank is turned off 2-3 minutes in advance.

[0024] Furthermore, in step S4, the number of times the circulating coating liquid is replenished is n, where n is 0 or a positive integer;

[0025] When n is 0, Δh = 0;

[0026] When n is a positive integer, Δh=h1'-h1+h2'-h2···h n '-h n , where h1' is the height of the liquid level in the circulation tank after the first replenishment of the circulating coating liquid, in m, h1 is the height of the liquid level in the circulation tank before the first replenishment of the circulating coating liquid, in m, and so on, h n ' is the liquid level height in the circulation tank after the nth replenishment of the circulating coating liquid, in m, h n It is the height of the liquid level in the circulation tank before the nth replenishment of the circulating coating liquid, in meters.

[0027] Furthermore, in step S5,

[0028] When r<0.6m, a=0.005m;

[0029] When 0.6m≤r<0.7m, a=0.003m;

[0030] When 0.7m≤r, a=0.002m.

[0031] Furthermore, in step S5,

[0032] When the flow rate of the circulating coating liquid in the infusion tube is 300kg / min-400kg / min and the diameter of the return pipe is 120mm-150mm, b=1.1;

[0033] When the flow rate of the circulating coating liquid in the infusion tube is 300kg / min-400kg / min, and the diameter of the return pipe is 90mm-110mm; or the flow rate of the circulating coating liquid in the infusion tube is 400kg / min-500kg / min, and the diameter of the return pipe is 110mm-130mm; or the flow rate of the circulating coating liquid in the infusion tube is 500kg / min-600kg / min, and the diameter of the return pipe is 130mm-150mm, b=1.0;

[0034] When the flow rate of the circulating coating liquid in the infusion pipe is 500kg / min-600kg / min and the diameter of the reflux pipe is 90mm-120mm, b=0.9.

[0035] Furthermore, in step S6, the mass M of the insulating coating liquid consumed by the oriented silicon steel coil is calculated according to formula (II):

[0036] M=M0(γ0*γ1-γ0) / (γ0*γ1-γ1) (II).

[0037] Furthermore, in step S7, the consumption V of insulating coating liquid per ton of steel is calculated according to formula (III):

[0038] V=M / m0(III).

[0039] The technical solution of the present invention has the following advantages over the prior art:

[0040] The calculation method of the present invention can accurately evaluate the consumption of the insulating coating liquid of each roll of oriented silicon steel, thereby providing timely guidance for production;

[0041] The calculation method of the present invention converts the circulating coating liquid of different specific gravities back to the amount of insulating coating liquid according to the specific gravity relationship, thereby ensuring the consistency before and after;

[0042] The calculation method of the present invention eliminates the influence of specific gravity change, water addition, liquid addition, stirring blades in the circulation tank and liquid level meter, so that the ton consumption calculation is as accurate as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Schematic diagram of the calculation method of the present invention.

[0044] Figure 2 Schematic diagram of the sampling point distribution for X-ray fluorescence spectrum testing. DETAILED DESCRIPTION

[0045] The present invention provides a method for calculating the consumption of insulating coating liquid per ton of steel for oriented silicon steel, which is aimed at the process of coating the surface of oriented silicon steel during the production process. In this process, a circulation tank, a liquid infusion pipe, a coating tank and a reflux pipe form a circulation system. When the production line is running, the circulation tank pump extracts the coating liquid in the circulation tank and fills the liquid infusion pipe to the coating tank of the coating machine. The coating machine coats the coating liquid on the surface of the oriented silicon steel plate, and the uncoated coating liquid flows back to the circulation tank through the reflux pipe. When the coating liquid flow rate (the flow rate of the circulating coating liquid in the liquid infusion pipe) is large, the liquid level of the coating tank will rise, and the liquid level of the circulation tank will drop accordingly; when the coating liquid flow rate is small, the liquid level of the coating tank will drop, and the liquid level of the circulation tank will rise accordingly.

[0046] The coating liquid circulating in the circulation system is the circulating coating liquid, which is prepared by adding water to the insulating coating liquid for oriented silicon steel. Specifically, in order to extend the shelf life, the insulating coating liquid for oriented silicon steel is generally packaged with AB liquid. When it is needed, the AB liquid is mixed in a liquid preparation tank in a certain proportion (the mixed liquid is the insulating coating liquid, which is the stock liquid), and stirred for a certain period of time. During the stirring process, a certain amount of water (such as desalted water) is added to prepare it to the required specific gravity to obtain the circulating coating liquid. After the stirring is completed, the obtained circulating coating liquid is added to the circulation tank for use.

[0047] During the circulation process, the circulating coating liquid will produce a certain amount of evaporation, resulting in an increase in the specific gravity of the coating liquid. Therefore, the specific gravity of the circulating coating liquid will be measured at intervals. When the specific gravity increases, a certain amount of desalted water will be added to the circulation tank to restore the specific gravity of the circulating coating liquid to the required specific gravity.

[0048] Based on this, the present invention can obtain the 24h circulation tank liquid level curve change by adding a set of online liquid level measurement equipment to the circulation tank. Taking the liquid level measurement equipment as an example, the bottom end is the zero point, and the 1mm liquid level gauge height corresponds to the 1mm liquid level height. Because the circulation pump has requirements for the minimum liquid level in the circulation tank, the liquid level in the circulation tank will not be lower than the zero point of the liquid level gauge. It is conceivable that the liquid level in the circulation tank can also be obtained in other ways, such as marking scales on the surface of the circulation tank.

[0049] like Figure 1 As shown, the calculation method of the present invention comprises the following steps:

[0050] S1: Detect the specific gravity γ1 of the circulating coating liquid;

[0051] S2: measure the radius r of the circulation tank, in m;

[0052] S3: Coating the oriented silicon steel coil, obtaining the liquid level height in the circulation tank before coating (initial liquid level height) h0 and the liquid level height in the circulation tank after coating (final liquid level height) h t , where h0 and h t The unit is m;

[0053] S4: Obtaining the coating process of the oriented silicon steel coil in step S3:

[0054] The sum of the mass of water added to adjust the specific gravity of the circulating coating liquid m1, in kg;

[0055] The total increase in the liquid level in the circulation tank caused by replenishing the circulating coating liquid (replenishing liquid), Δh, in meters;

[0056] S5: Calculate the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil according to formula (I):

[0057] M0=(3.14*(ra)^2*(h0-h t +Δh)+m1 / 1000)*γ1*1000*b(I);

[0058] Wherein, a is the correction coefficient of the circulation tank radius, the value range is 0.002-0.005, and the unit is m;

[0059] b is the coating tank correction coefficient, ranging from 0.9 to 1.1;

[0060] S6: Calculate the mass M of the insulating coating liquid consumed by the oriented silicon steel coil according to the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil, the specific gravity γ0 of the insulating coating liquid, and the specific gravity γ1 of the circulating coating liquid;

[0061] S7: Calculate the consumption V of insulating coating liquid per ton of steel based on the mass M of insulating coating liquid consumed by the oriented silicon steel coil and the mass m0 of the oriented silicon steel coil, where the unit of m0 is t.

[0062] It is conceivable that, in the above steps, the order of steps S1, S2 and S3-S4 is not limited, that is, steps S1, S2 and S3-S4 can be performed simultaneously, or steps S3-S4 can be performed first, and then the specific gravity γ1 of the circulating coating liquid is detected (step S1) and the radius r of the circulation tank is measured (step S2).

[0063] The method of the present invention can individually calculate the coating process of each roll of oriented silicon steel, and can accurately represent the consumption of insulating coating liquid of each roll of oriented silicon steel. At the same time, the coating does not need to be stopped during the calculation process, and the production process of oriented silicon steel is not affected.

[0064] In one embodiment, a liquid level measuring device is installed in the circulation tank, and the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating are obtained by installing the liquid level measuring device. t And the total increase Δh in the liquid level in the circulation tank caused by replenishing the circulating coating liquid.

[0065] Preferably, the liquid level measuring device is a liquid level meter, such as a static pressure liquid level meter, an ultrasonic liquid level meter, a radar liquid level meter, etc., which can accurately detect the liquid level height in the circulation tank.

[0066] Preferably, the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating are obtained. t Before the total increase Δh of the liquid level in the circulation tank caused by the replenishment of the circulating coating liquid, the stirring paddle in the circulation tank is closed in advance to keep the liquid level in the circulation tank level and ensure the accuracy of the liquid level detection data. Specifically, the stirring paddle in the circulation tank can be closed 2-3 minutes in advance.

[0067] During the coating process of the oriented silicon steel coil, the liquid is replenished or not replenished according to the amount of circulating coating liquid in the circulation system. The number of replenishments can be 1 time or more, that is, in step S4, the number of times n of replenishing the circulating coating liquid is 0 or a positive integer.

[0068] When n is 0, that is, no fluid is replenished, Δh = 0;

[0069] When n is a positive integer, that is, when rehydration is performed, Δh=h1'-h1+h2'-h2···h n '-h n , where h1' is the height of the liquid level in the circulation tank after the first replenishment of the circulating coating liquid, in m, h1 is the height of the liquid level in the circulation tank before the first replenishment of the circulating coating liquid, in m, and so on, h n ' is the liquid level height in the circulation tank after the nth replenishment of circulating coating liquid, in m, h n It is the liquid level height in the circulation tank before the nth replenishment of the circulating coating liquid, in meters.

[0070] In formula (I), a is the correction coefficient for the radius of the circulation tank. Because there are objects such as agitators and liquid level gauges in the circulation tank, the actual use radius of the circulation tank needs to be corrected. m1 is the sum of the mass of water added to adjust the specific gravity during the production of oriented silicon steel. Because the specific gravity of the coating liquid needs to be adjusted by adding water, adding water will cause a certain increase in the liquid level, resulting in a decrease in the liquid level drop during the calculation process, and its influence needs to be eliminated. b is the correction coefficient for the coating tank, the purpose of which is to correct the changes in the diameter and flow rate of the reflux pipe, resulting in the situation in which part of the coating liquid in the coating tank that rises in the production of oriented silicon steel does not flow back to the circulation tank, or part of the coating liquid in the coating tank that drops in the production level flows back to the circulation tank.

[0071] Specifically, when r<0.6m, a=0.005m;

[0072] When 0.6m≤r<0.7m, a=0.003m;

[0073] When 0.7m≤r, a=0.002m;

[0074] When the coating liquid flow rate is 300kg / min-400kg / min and the reflux pipe diameter is 120mm-150mm, b=1.1;

[0075] When the coating liquid flow rate is 300kg / min-400kg / min, the diameter of the reflux pipe is 90mm-110mm; or the coating liquid flow rate is 400kg / min-500kg / min, the diameter of the reflux pipe is 110mm-130mm; or the coating liquid flow rate is 500kg / min-600kg / min, the diameter of the reflux pipe is 130mm-150mm, b=1.0;

[0076] When the coating liquid flow rate is 500kg / min-600kg / min and the reflux pipe diameter is 90mm-120mm, b=0.9.

[0077] Because of different specific gravities, the coating liquid consumption is also different. The specific gravity of the circulating coating liquid will be adjusted according to the production line conditions. In order to ensure uniform calculation, the specific gravity of the stock solution (insulating coating liquid) is used to measure the coating liquid consumption. According to the definition of specific gravity, it can be obtained that the mass of the circulating coating liquid / the mass of the insulating coating liquid = (γ0*γ1-γ0) / (γ0*γ1-γ1). Therefore, in step S6, the mass M of the insulating coating liquid consumed by the oriented silicon steel coil is calculated according to formula (II):

[0078] M=M0(γ0*γ1-γ0) / (γ0*γ1-γ1)(II);

[0079] In step S7, the consumption V of insulating coating liquid per ton of steel is calculated according to formula (III):

[0080] V=M / m0(III).

[0081] Substituting formula (I) and (II) into formula (III), we can obtain:

[0082] V=M / m0=M0(γ0*γ1-γ0) / (γ0*γ1-γ1) / m0=(3.14*(ra)^2*(h0-h t +Δh)+m1 / 1000)

[0083] *γ1*1000*b(γ0*γ1-γ0) / (γ0*γ1-γ1) / m0.

[0084] The present invention is further described below in conjunction with specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0085] Example 1

[0086] The measured radius r of the circulation tank is 0.600m, and the correction coefficient a=0.003m.

[0087] No liquid replenishment was performed during the production of coil A oriented silicon steel. The liquid level record h0 of the circulation tank when the coil head weld passed through the coating machine was 0.765m, and the liquid level record h0 of the circulation tank when the coil tail weld passed through the coating machine was 0.765m. t is 0.599m; the specific gravity of the original coating liquid γ0 is 1.265, the specific gravity of the coating liquid γ1 is 1.240, and the weight of water added is 20kg; the diameter of the reflux pipe is 120mm, the coating liquid flow rate is 500kg / min, and the correction coefficient b=1.0; the weight of the roll at the end of production is 18.64t.

[0088] V=(((3.14*(0.600-0.003)^2*(0.765-0.599)+20 / 1000)*1.240*1000* 1.0)(1.265*1.240-1.265) / (1.265*1.240-1.240)) / 18.64=12.65kg / t.

[0089] Therefore, the consumption of insulating coating liquid for oriented silicon steel coil A is 12.65kg / t.

[0090] The finished product is sampled in the subsequent slitting line, and the samples at 5 length positions are tested by X-ray fluorescence spectrum and the dry coating mass per unit area is calculated. Three samples are taken at each length position, and the sampling points are distributed as follows: Figure 2 After calculating the average value of the fluorescence test results, combined with the solid content of the insulating coating liquid, the consumption of the insulating coating liquid for oriented silicon steel coil A is calculated as the average value of the fluorescence test (g / m 2 ) / solid content*whole roll length (m)*whole roll width (m)*2 / 1000 / whole roll weight (t)=4.08 / 0.40*9541*1.205*2 / 1000 / 18.64=12.58kg / t, the error is only 0.56%.

[0091] Example 2

[0092] The measured radius r of the circulation tank is 0.700m, and the correction coefficient a=0.002m.

[0093] During the production process of B coil oriented silicon steel, one refill is performed. When the coil head weld passes through the coating machine, the circulating tank liquid level record h0 is 0.615m, the circulating tank liquid level h1 before refill is 0.544m, the circulating tank liquid level h1' after refill is 0.748m, and the circulating tank liquid level record h0 when the coil tail weld passes through the coating machine t is 0.650m; the specific gravity of the original coating liquid γ0 is 1.265, the specific gravity of the coating liquid γ1 is 1.240, and the weight of water added is 0kg; the diameter of the reflux pipe is 100mm, and the coating liquid flow rate is 550kg / min; the weight of the roll at the end of production is 18.93t.

[0094] V=(((3.14*(0.700-0.002)^2*(0.615-0.544+0.748-0.650)+0 / 1000)*1.240* 1000*0.9)(1.265*1.240-1.265) / (1.265*1.240-1.240)) / 18.93=14.08kg / t.

[0095] Therefore, the consumption of insulating coating liquid for oriented silicon steel coil B is 14.08kg / t.

[0096] The finished product is sampled in the subsequent slitting line, and the samples at 5 length positions are tested by X-ray fluorescence spectrum. After calculating the average value of the fluorescence test results, combined with the solid content value of the insulating coating liquid, the consumption of B roll oriented silicon steel insulating coating liquid is converted = fluorescence test average value / solid content*whole roll length*whole roll width*2 / 1000 / whole roll weight=4.59 / 0.40*9675*1.203*2 / 1000 / 18.93=14.11kg / t, with an error of only 0.21%.

[0097] Example 3

[0098] The measured radius r of the circulation tank is 0.500m, and the correction coefficient a=0.005m.

[0099] During the production process of C coil oriented silicon steel, one refill is performed. When the coil head weld passes through the coating machine, the circulating tank liquid level record h0 is 0.681m, the circulating tank liquid level h1 before refill is 0.546m, the circulating tank liquid level h1' after refill is 0.734m, and the circulating tank liquid level record h t is 0.622m; the specific gravity of the original coating liquid γ0 is 1.265, the specific gravity of the coating liquid γ1 is 1.240, the weight of water added is 10kg; the diameter of the reflux pipe is 140mm, the coating liquid flow rate is 300kg / min; the weight of the roll at the end of production is 19.15t.

[0100] V=(((3.14*(0.500-0.005)^2*(0.681-0.546+0.734-0.622)+10 / 1000)*1.240 *1000*1.1)(1.265*1.240-1.265) / (1.265*1.240-1.240)) / 19.15=13.16kg / t.

[0101] Therefore, the consumption of insulating coating liquid for C coil oriented silicon steel is 13.16kg / t.

[0102] The finished product is sampled in the subsequent slitting line, and the samples at 5 length positions are tested for X-ray fluorescence spectrum. After calculating the average value of the fluorescence test results, combined with the value of the solid content of the insulating coating liquid, the consumption of the insulating coating liquid of the C roll oriented silicon steel is converted into the average value of the fluorescence test (g / m 2 ) / solid content*whole roll length (m)*whole roll width (m)*2 / 1000 / whole roll weight (t)=4.20 / 0.40*9864*1.203*2 / 1000 / 19.15=13.01kg / t, the error is only 1.15%.

[0103] Example 4

[0104] The measured radius r of the circulation tank is 0.650m, and the correction coefficient a=0.003m.

[0105] No liquid replenishment was performed during the production of D coil oriented silicon steel. The liquid level record h0 of the circulation tank when the coil head weld passed through the coating machine was 0.782m, and the liquid level record h0 of the circulation tank when the coil tail weld passed through the coating machine was 0.782m. t is 0.635m; the specific gravity of the original coating liquid γ0 is 1.285, the specific gravity of the coating liquid γ1 is 1.240, the weight of water added is 20kg; the diameter of the reflux pipe is 150mm, the coating liquid flow rate is 300kg / min; the weight of the roll at the end of production is 18.40t.

[0106] V=(((3.14*(0.650-0.003)^2*(0.782-0.665)+20 / 1000)*1.240*1000* 1.1)(1.285*1.240-1.285) / (1.285*1.240-1.240)) / 18.40=11.24kg / t.

[0107] Therefore, the consumption of insulating coating liquid for D coil oriented silicon steel is 11.90kg / t.

[0108] The finished product is sampled in the subsequent slitting line, and the samples at 5 length positions are tested for X-ray fluorescence spectrum. After calculating the average value of the fluorescence test results, combined with the value of the solid content of the insulating coating liquid, the consumption of the insulating coating liquid of the D-roll oriented silicon steel is converted into the average value of the fluorescence test (g / m 2 ) / solid content*whole roll length (m)*whole roll width (m)*2 / 1000 / whole roll weight (t)=3.75 / 0.40*9251*1.203*2 / 1000 / 18.40=11.34kg / t, the error is only 0.88%.

[0109] In summary, the calculation method of the present invention can accurately represent the coating liquid consumption of each roll of oriented silicon steel. It is conceivable that the calculation method is also applicable to other products that require surface coating.

[0110] Obviously, the above embodiments are only examples for clear explanation and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the protection scope of the invention.

Claims

1. A method for calculating the consumption of insulating coating liquid per ton of steel for oriented silicon steel, characterized in that: The following steps are included: S1: Detecting the specific gravity γ1 of the circulating coating liquid, wherein the circulating coating liquid is prepared by adding water to the insulating coating liquid, and the circulation path of the circulating coating liquid includes a circulation tank, a liquid infusion pipe, a coating liquid tank and a reflux pipe; S2: Measure the radius r of the circulation tank, in m; S3: coating the oriented silicon steel coil, obtaining the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating t , where h0 and h t The unit is m; S4: Obtaining the coating process of the oriented silicon steel coil in step S3: The sum of the mass of water added to adjust the specific gravity of the circulating coating liquid is m1, in kg; The total increase in the liquid level in the circulation tank caused by replenishing the circulating coating liquid is Δh, in meters; S5: Calculate the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil according to formula (I): M0=(3.14*(r-a)^2*(h0-h t +Δh)+m1 / 1000)*γ1*1000*b(I); Wherein, a is the correction coefficient of the circulation tank radius, the value range is 0.002-0.005, and the unit is m; b is the coating tank correction coefficient, ranging from 0.9 to 1.1; S6: Calculate the mass M of the insulating coating liquid consumed by the oriented silicon steel coil according to the mass M0 of the circulating coating liquid consumed by the oriented silicon steel coil, the specific gravity γ0 of the insulating coating liquid, and the specific gravity γ1 of the circulating coating liquid; S7: Calculate the consumption V of insulating coating liquid per ton of steel according to the mass M of insulating coating liquid consumed by the oriented silicon steel coil and the mass m0 of the oriented silicon steel coil, wherein the unit of m0 is t; The order of steps S1, S2 and S3-S4 is not limited.

2. The calculation method according to claim 1, characterized in that: A liquid level measuring device is installed in the circulation tank, and the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating are obtained by the installed liquid level measuring device. t And the total increase Δh of the liquid level in the circulation tank caused by replenishing the circulating coating liquid.

3. The calculation method according to claim 1 or 2, characterized in that: Obtain the liquid level height h0 in the circulation tank before coating and the liquid level height h0 in the circulation tank after coating. t And before the total increase Δh of the liquid level in the circulation tank caused by replenishing the circulating coating liquid, the stirring paddle in the circulation tank is closed in advance to keep the liquid level in the circulation tank horizontal.

4. The calculation method according to claim 1, characterized in that: In step S4, the number of times the circulating coating liquid is replenished is n, where n is 0 or a positive integer; When n is 0, Δh = 0; When n is a positive integer, Δh=h1'-h1+h2'-h2···h n '-h n , where h1' is the height of the liquid level in the circulation tank after the first replenishment of the circulating coating liquid, in m, h1 is the height of the liquid level in the circulation tank before the first replenishment of the circulating coating liquid, in m, and so on, h n ' is the liquid level height in the circulation tank after the nth replenishment of the circulating coating liquid, in m, h n It is the height of the liquid level in the circulation tank before the nth replenishment of the circulating coating liquid, in meters.

5. The calculation method according to claim 1, characterized in that: In the step S5, When r<0.6m, a=0.005m; When 0.6m≤r<0.7m, a=0.003m; When 0.7m≤r, a=0.002m.

6. The calculation method according to claim 1, characterized in that: In the step S5, When the flow rate of the circulating coating liquid in the infusion tube is 300kg / min-400kg / min and the diameter of the return pipe is 120mm-150mm, b=1.1; When the flow rate of the circulating coating liquid in the infusion tube is 300kg / min-400kg / min, and the diameter of the return pipe is 90mm-110mm; or the flow rate of the circulating coating liquid in the infusion tube is 400kg / min-500kg / min, and the diameter of the return pipe is 110mm-130mm; or the flow rate of the circulating coating liquid in the infusion tube is 500kg / min-600kg / min, and the diameter of the return pipe is 130mm-150mm, b=1.0; When the flow rate of the circulating coating liquid in the infusion pipe is 500kg / min-600kg / min and the diameter of the reflux pipe is 90mm-120mm, b=0.

9.

7. The calculation method according to claim 1, characterized in that: In step S6, the mass M of the insulating coating liquid consumed by the oriented silicon steel coil is calculated according to formula (II): M=M0(γ0*γ1-γ0) / (γ0*γ1-γ1) (II).

8. The calculation method according to claim 1 or 7, characterized in that: In step S7, the consumption V of insulating coating liquid per ton of steel is calculated according to formula (III): V=M / m0(III).

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