Method and device for measuring ladle long-nozzle steel slag by resonance-point balance method
A measurement method and long nozzle technology, applied in the direction of measurement devices, mechanical devices, and material analysis using sound waves/ultrasonic waves/infrasonic waves, etc., can solve problems such as high temperature, damage, and high cost
Active Publication Date: 2011-06-15
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
The disadvantage of this method is: the coil will be made of special alloy material, the cost is high
The coil is installed on the upper part of the ladle sliding nozzle. The working environment temperature is high, and the service life of the coil has a certain limit. It is often damaged and replaced frequently.
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[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0044] A steel ladle shroud resonance point balance method steel slag measurement method is to establish a measurement model of molten steel and steel slag according to the vibrations produced when the molten steel and steel slag flow in the shroud; the measurement model is:
[0045] d 2320 μD πρ 2 g ( 2 G + lD 2 πρ ) - - - ( 8 )
[0046] There are two states of molten steel flowing in the pipeline, one is laminar flow and the other is turb...
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The invention relates to a method and a device for measuring steel slag carried by molten steel in the tapping process of continuous casting ladles. The method for measuring ladle long-nozzle steel slag by a resonance-point balance method establishes a measurement model of molten steel and steel slag according to different vibration produced when the molten steel and the steel slag flow in a long nozzle, wherein the measurement model is shown as follow: d<(2320muD(pi*rho)<1 / 2>) / (2g(2G+lD<2>pi*rho))<1 / 2>. If the opening degree d of a sliding nozzle meets the conditions of the above formula, the molten steel flowing through the long nozzle is laminar flow little in impact vibration on the wall of a pipe. When the opening degree d of the sliding nozzle does not meet the conditions of the formula, namely when the opening degree d of the sliding nozzle is equal to or greater than a value in the formula, the steel slag appears in the molten steel and produces turbulent flow in the long nozzle to cause the intense vibration of the pipe. The invention can measure vibration signals of the ladle long nozzle on line, establish a steel-slag model on line according to the vibration signals obtained by measurement and compare the established steel-slag model with the steel-slag model in computer memory so as to close the sliding nozzle in time when the content of the steel slag reaches a set value and send out alarm and control signals.
Description
technical field [0001] The invention relates to a method and a device for measuring steel slag entrained in molten steel during continuous casting ladle tapping. Background technique [0002] In order to improve the quality of steel and reduce costs, in the production process of steelmaking and continuous casting, it is required that the steel slag content of the ladle (ladle, hereinafter referred to as ladle) in the molten steel flowing into the tundish meets the standard required by the process. A steel slag measuring device is installed on the ladle so that the sliding nozzle can be closed in time when steel slag appears. [0003] The currently used steel slag measurement device adopts the electromagnetic coil method. The measurement principle is to install an electromagnetic coil at the steel outlet of the ladle sliding nozzle, and connect the excitation power to the coil. When the steel slag appears, the magnetic flux of the coil will change. As a result, the terminal ...
Claims
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IPC IPC(8): G01N19/00G01N29/00B22D11/10
Inventor 唐安祥申屠理锋张立钟志敏顾文兵蒋际欢冯爱萍邴建军王勇
Owner BAOSHAN IRON & STEEL CO LTD