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A device for measuring the surface flow field of molten steel in a mold based on current changes

A technology of current change and crystallizer, which is applied in the field of iron and steel metallurgy and steelmaking, can solve problems such as the difficulty of measuring the change of molten steel flow field in the crystallizer, and achieve the effect of ensuring accuracy

Active Publication Date: 2022-07-29
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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  • A device for measuring the surface flow field of molten steel in a mold based on current changes
  • A device for measuring the surface flow field of molten steel in a mold based on current changes
  • A device for measuring the surface flow field of molten steel in a mold based on current changes

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Embodiment 1

[0035] combine Figures 1 to 3, a device for measuring the surface flow field of molten steel in a mold based on current changes in this embodiment includes a pin 4, an ammeter 5, a power supply 7, a pin fixing plate 8 and a voltmeter 10, and the pin 4 is vertically fixed In the pin fixing plate 8, the pin 4 is in the shape of a cylinder. The pin 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 pin 4. The plug 4 is composed of a resistor 41 and a refractory material 42. The resistor 41 is equally distributed along the inner surface n of the cylinder of the refractory material 42. In this embodiment, the value of n is 8. The ammeter 5 is connected to the resistor 41 through a wire. 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 ammeter 56, a seventh ammeter 57, and an eighth ammeter ...

Embodiment 2

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

[0047] The method and steps of the method for measuring the flow field change of the molten steel 1 in the mold based on the current change of the present embodiment are basically the same as those in the embodiment 1. The difference is that a preproce...

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Abstract

The invention discloses a current change-based measuring device for the surface flow field of molten steel in a mold, belonging to the technical field of iron and steel metallurgy. A device for measuring the surface flow field of molten steel in a mold based on current change of the present invention comprises a pin, an ammeter, a power supply and a pin fixing plate, the pin is vertically fixed on the pin fixing plate, and the pins, The ammeter, the power supply and the mold copper plate are connected in series, and the voltmeter is connected in parallel with the pin; the closed-loop circuit of the molten steel, the mold copper plate, the resistance and the ammeter can measure the change of the loop current to measure the depth of the inserted pin in the molten steel, and then realize The measurement of molten steel level fluctuation and flow field in the mold; in addition, in order to ensure the accuracy of the measurement, a heating part is also installed in the plug, and the cold plug is heated to the molten steel temperature in advance to reduce the temperature The change of the field causes the change of the flow field, which improves the accuracy of the measurement.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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