Device and method for adjusting argon flow of bottom blowing for steel ladle during LF refining and standing period

A technology of bottom blowing argon and argon flow, which is applied in the flow control of electric devices, etc., can solve the problems of meaningless flow adjustment, high dependence on process parameter stability, and inability to obtain argon flow accurately, etc., to achieve large Promote the use value, improve the cleanliness of molten steel, and achieve significant economic benefits

Active Publication Date: 2018-01-19
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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Problems solved by technology

But the shortcoming is that this method is highly dependent on the stability of the process parameters on site, and is easily affected by various factors such as the quality of molten steel and the type

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  • Device and method for adjusting argon flow of bottom blowing for steel ladle during LF refining and standing period
  • Device and method for adjusting argon flow of bottom blowing for steel ladle during LF refining and standing period
  • Device and method for adjusting argon flow of bottom blowing for steel ladle during LF refining and standing period

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[0043] The principle of the present invention is: due to the temperature difference between the molten steel and the steel slag, the brightness of the two is also quite different. Because the molten steel temperature is high, the brightness value is relatively large; the steel slag temperature is low, the brightness value is relatively small. When the bottom blowing argon gas flow rate is small, the lamination of molten steel and steel slag is more obvious, and the temperature change range of the two is also small. With the increase of bottom-blown argon gas flow rate, the molten steel starts to contact with steel slag under the stirring of argon gas, so as to continuously transfer its own heat to steel slag, so that the temperature of steel slag begins to increase, and the brightness also begins to increase. In addition, under the continuous erosion of molten steel, the thickness of the slag layer near the blowing bricks at the bottom of the ladle begins to decrease, which wi...

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Abstract

A device and a method for adjusting argon flow of bottom blowing for a steel ladle during an LF refining and standing period belong to the technical field of LF refining equipment and methods, and areused for automatically adjusting argon flow of bottom blowing for a steel ladle during an LF refining and standing period. The technical scheme is that an image acquisition apparatus is arranged above a standing position of a steel ladle, a signal output end of the image acquisition apparatus is connected with a computer, an argon flow solenoid valve is arranged a steel ladle bottom blowing argonconveying pipeline, and a control end of the argon flow solenoid valve is connected with the computer through a solenoid valve programmable controller. The device and the method are pioneers of a steel ladle bottom flowing technology, solve the long-existing problem that the bottom flowing argon flow for the steel ladle cannot be adjusted automatically, are capable of automatically adjusting flowof bottom blowing argon on the basis of actual situations of molten steel in the steel ladle, play an extremely important role in improving cleanliness of molten steel after LF refining and stably improving the quality of molten steel and subsequent final rolled products, and have substantial economic benefits.

Description

technical field [0001] The invention relates to a device and a use method for adjusting the flow rate of argon gas blown at the bottom of a ladle during the standing period of LF refining, and belongs to the technical field of LF refining equipment and methods. Background technique [0002] At present, LF refining has become an important means for modern steel mills to produce clean steel. Ladle static link is the last link in the LF refining process. In this link, the production site needs to blow a certain amount of argon into the ladle through the breathable brick installed at the bottom of the ladle, which is called "bottom blowing", so as to carry out bottom blowing argon stirring treatment on the molten steel. The reason for bottom blowing is that after a series of operations such as power supply and temperature rise in the early stage of LF and molten steel deoxidation and desulfurization, a large amount of calcium-aluminate inclusions will be suspended in molten ste...

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Application Information

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IPC IPC(8): G05D7/06C21C7/072
Inventor 许斌范佳孙玉虎王彦杰贾永坡高福彬张守伟王伟兵
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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