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The Method of Dynamically Adjusting the Flow of Emulsion in Continuous Cold Rolling Mill

A technology of dynamic adjustment for tandem cold rolling mills, applied in the field of metallurgy, can solve problems such as inaccurate control of emulsion flow in tandem cold rolling mills, complex maintenance of the control system, and impact on product quality, so as to solve emulsion overflow, reduce process consumption, and avoid The effect of emulsion reflux

Active Publication Date: 2022-04-29
广西钢铁集团有限公司 +1
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Problems solved by technology

[0008] The invention provides a method for dynamically adjusting the flow rate of the emulsion in a tandem cold rolling mill, which solves the problem that the flow control of the emulsion in a tandem cold rolling mill is not accurate or the control system is too complicated, difficult to maintain and operate poorly, and affects product quality.

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  • The Method of Dynamically Adjusting the Flow of Emulsion in Continuous Cold Rolling Mill

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Embodiment 1

[0061] This embodiment takes the five-stand tandem cold rolling mill production line in the production workshop of Guangxi Iron and Steel Group Co., Ltd. as an example, and introduces in detail the method and effect of how to dynamically adjust the flow rate of the emulsion in the tandem cold rolling mill.

[0062] It includes the following steps:

[0063] A. Using the principle of heat balance, the function of rolling speed and emulsion flow is constructed through formula derivation; among them, the specific formula derivation process is as follows:

[0064] ① The calculation formula of the emulsion flow value f of the emulsion required by the system is:

[0065] Formula 1);

[0066] Among them, f——the flow rate of emulsion, L / min;

[0067] Δt——The temperature rise of the emulsion, °C;

[0068] Cs ——Specific heat of steel, heal / kg·℃;

[0069] r s - specific gravity of steel, kg / m3;

[0070] Q——heat generated by power consumption, kcal / min;

[0071] ②The formula for ...

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Abstract

The invention discloses a method for dynamically adjusting the emulsified liquid flow rate of a cold tandem rolling mill, and relates to the technical field of metallurgy. It includes using the principle of heat balance, deriving through formulas, constructing the rolling speed and emulsion flow function, and using the constructed rolling speed and emulsion flow function to control the emulsion flow according to the rolling speed. The present invention realizes the function of dynamic adjustment of the emulsion following the rolling speed by deriving the relationship between the flow rate of the emulsion and the rotational speed of the main motor of the rolling mill, and better solves the problems of the emulsion overflow and the inaccurate measurement of the thickness gauge existing in the original system , the development cost is low, the operation and maintenance are convenient, the process consumption is significantly reduced, the yield and product quality have been qualitatively improved, and economic benefits have been brought to the cold rolling production and operation.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for dynamically adjusting the emulsified flow rate of a cold tandem rolling mill. Background technique [0002] In the rolling process of cold-rolled strip steel, the emulsion plays a very important role in the rolling process as a rolling lubrication and cooling medium. Cold-rolled strip steel is produced at room temperature, with an average deformation of about 70%, and a rolling speed of more than 700m / min. The high deformation amount and high deformation rate cause a large amount of rolling heat, and the tempering temperature of the cold-rolled work rolls is between 150 and 200 °C. First, the emulsion should take away the rolling heat, and second, it should avoid defects on the surface of the strip and tempering of the rolls. Therefore, it is very important to maintain the accuracy of the emulsion injection flow rate. Generally, the emulsion system has three wo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00B21B45/02
CPCB21B37/00B21B45/0218B21B45/0251B21B2037/002
Inventor 唐水清陆兆刚蒋才灵艾新荇蔡国庆张栋梁
Owner 广西钢铁集团有限公司
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