Method for determining liquid friction force of continuous casting crystallizer
A continuous casting mold and friction technology, which is used in instruments, special data processing applications, electrical digital data processing, etc. Effect
Inactive Publication Date: 2013-02-13
NORTHEASTERN UNIV
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Problems solved by technology
In actual operation, the velocity distribution of mold slag slag between the slab and the mold is not linear, and the velocity on both sides of the liquid slag film is not necessarily equal to the vibration velocity of the mold and the casting velocity. Therefore, the calculation results of this model are different from individual The actual measured data differ greatly, and cannot better reflect the lubrication condition in the crystallizer
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[0036] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0037] A method for determining the fluid friction in a continuous casting mold, such as figure 1 shown, including the following steps:
[0038] Step 1. Determine the parameters of the mold slag channel in the continuous casting mold;
[0039] The parameters of the mold slag track include the length and width of the mold slag track and the thickness of the liquid slag film that fills the mold slag track; wherein, the mold slag track length refers to the depth at which the liquid slag fills the mold slag track, and the mold slag track width refers to the thickness of the slab. The width and the thickness of the liquid slag film show an increasing trend with the length of the mold slag channel;
[0040] In step 1, the parameters of the mold slag channel in the continuous casting mold are determined, and the length and width of the mold slag channel a...
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The invention discloses a method for determining the liquid friction force of a continuous casting crystallizer, which belongs to the field of mathematical simulation applications of continuous casting crystallizers for ferrous metallurgy. The method comprises the following steps: firstly, determining parameters of a casting powder channel in the continuous casting crystallizer; then, determining the consumption of casting powder in a unit time; according to the determined width of the casting powder channel, the thickness of a liquid casting powder film and the consumption of casting powder in a unit time, calculating the flow velocity of casting powder at each position in the casting powder channel by using a mass balance equation, and establishing an energy conservation equation; and according to the determined flow velocity of casting powder, calculating the liquid friction force. The method is put forward based on the energy conservation equation and the actually measured consumption of casting powder, and provides a new thought for analyzing the lubrication in a vibrating crystallizer; and the liquid friction force determination method disclosed by the invention reflects the changes of a liquid friction force in the crystallizer on the whole, so that the problem that the velocity gradient of liquid casting powder is difficult to accurately obtain in the existing methods is avoided, therefore, the results are more accurate.
Description
technical field [0001] The invention belongs to the application field of mathematical simulation of iron and steel metallurgical continuous casting crystallizers, in particular to a method for determining the liquid friction force of continuous casting crystallizers. Background technique [0002] Continuous casting plays an important role in the manufacturing process of steel products as a link between the preceding and the following. The mold, known as the "heart of the continuous casting machine", has important functions such as efficient heat transfer, solidification and forming, purification of molten steel, and quality control. The friction force of the continuous casting mold has a very important influence on the quality of the slab. When the friction between the slab and the mold reaches a certain level, it may cause adhesion between the slab and the mold or even a breakout accident, especially With the increase of billet casting speed, the proportion of breakout acci...
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IPC IPC(8): B22D11/16B22D11/18G06F17/50
Inventor 孟祥宁杨杰朱苗勇
Owner NORTHEASTERN UNIV