Device for measuring surface flow field of molten steel in crystallizer based on current change

A measuring device and a technology for current change, applied in the field of iron and steel metallurgy and steelmaking, can solve the problems of difficulty in measuring the change of the molten steel flow field of the mold, and achieve the effect of ensuring accuracy

Active Publication Date: 2021-07-27
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the change of the molten steel flow field in the mold is difficult to measure in the prior art, and to provide a device for measuring the change of the molten steel flow field in the mold based on the current change. The nails are inserted to form different heights around the nails, thereby forming different closed-loop circuits, and measuring the liquid level fluctuation and flow velocity change of the molten steel in the mold according to the current change, and realizing the real-time measurement of the flow field inside the mold

Method used

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  • Device for measuring surface flow field of molten steel in crystallizer based on current change
  • Device for measuring surface flow field of molten steel in crystallizer based on current change
  • Device for measuring surface flow field of molten steel in crystallizer based on current change

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Embodiment 1

[0035] combine Figure 1~3, a device for measuring the surface flow field of molten steel in a crystallizer based on current changes in this embodiment includes a nail 4, an ammeter 5, a power supply 7, a nail fixing plate 8, and a voltmeter 10, and the nail 4 is vertically fixed As for the nail fixing plate 8, the nail 4 is in the shape of a cylinder, and the nail 4, the ammeter 5, the power supply 7 and the mold copper plate 2 are respectively connected in series by wires, and the voltmeter 10 is connected in parallel with the nail 4. This nail 4 is made up of resistance 41 and refractory material 42, and resistance 41 is distributed along the inner surface of refractory material 42 cylinder n equally, and the value of n in this embodiment is 8, and ammeter 5 is connected with resistance 41 through lead wire, and the ammeter of this embodiment 5 is composed of a first ammeter 51, a second ammeter 52, a third ammeter 53, a fourth ammeter 54, a fifth ammeter 55, a sixth ammete...

Embodiment 2

[0046] The basic content of this embodiment is the same as that of Embodiment 1. The difference is that the nail insert 4 also includes a heating element 43, which is cylindrical and arranged inside the cylinder of the nail insert 4. The heating element 43 is heated by a silicon molybdenum rod. or electromagnetic heating such as Figure 5 As shown, the heating temperature of the heating member 43 is consistent with the temperature of the molten steel 1 during use. The temperature field around the nail 4 changes sharply, resulting in a change in the flow field, and the original temperature field and flow field are kept unchanged to the greatest extent to achieve measurement accuracy.

[0047] The steps of the method for measuring the flow field change of molten steel 1 in the mold based on current changes in this embodiment are basically the same as in Example 1, except that the pretreatment step is added: the temperature of molten steel 1 in the mold is measured, The nail 4 i...

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Abstract

The invention discloses a device for measuring a surface flow field of molten steel in a crystallizer based on current change, and belongs to the technical field of ferrous metallurgy steelmaking. The device for measuring the surface flow field of the molten steel in the crystallizer based on the current change comprises a plug pin, an ammeter, a power supply and a plug pin fixing plate, and the plug pin is vertically fixed to the plug pin fixing plate. The plug pin, the ammeter, the power supply and a crystallizer copper plate are separately connected in series through wires, and a voltmeter is connected with the plug pin in parallel; the molten steel, the crystallizer copper plate, a resistor and an ampere meter are in a closed loop, the depth of inserting the molten steel plug pin is measured by measuring the current change of the loop, so that the liquid level fluctuation and the flow field of the molten steel in the crystallizer are measured; and besides, in order to ensure the accuracy of measurement, a heating part is further installed in the plug pin, the cold plug pin is heated to the temperature of the molten steel in advance during use, the change of the flow field caused by the change of a temperature field is reduced, and the accuracy of measurement is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy and steelmaking in the metallurgical industry, and more specifically relates to a device for measuring the surface flow field of molten steel in a crystallizer based on current changes. Background technique [0002] The continuous casting process is an indispensable process in iron and steel metallurgy, and the mold is an important equipment in continuous casting. In the continuous casting process, the stability of the flow field in the mold, especially on the upper surface, is an important prerequisite to ensure the quality of the slab. Fluctuation of liquid steel level caused by turbulent flow of molten steel inside the mold is an important reason for the asymmetrical flow field and slag entrainment on both sides of the nozzle. Within a reasonable range, large liquid level fluctuations not only affect the surface quality of the continuous casting slab, but also cause accidents...

Claims

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Application Information

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IPC IPC(8): B22D11/18B22D2/00
CPCB22D11/186
Inventor 杨文张立峰任英李亚琼姜东滨任强音正元
Owner UNIV OF SCI & TECH BEIJING
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