Meniscus flow control device and meniscus flow control method using same

Patent metadata

Field	Value
Publication number	US-10710152-B2
Application number	US-201515528199-A
Country	US
Kind code	B2
Filing date	Nov 19, 2015
Priority date	Nov 19, 2014
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

Provided is a meniscus flow control device that includes: a meniscus flow detection unit for detecting, in a meniscus flow form of molten steel, relative temperature values for positions measured by temperature measurers, and relatively comparing the temperature values measured by the temperature measurers to thereby determine the flow state of the molten steel meniscus to be normal or abnormal; a magnetic field generation unit, installed outside a mold, for generating a magnetic field and controlling the flow of the molten steel by the magnetic field; and a flow control unit for maintaining the operation of the magnetic field generation unit in the current state when the meniscus flow state detected by the meniscus flow detection unit is determined to be normal, and for controlling the magnetic field generation unit to adjust the meniscus flow to be normal when the detected meniscus flow state is determined to be abnormal.

First claim

The invention claimed is:

1. A method of controlling a meniscus flow in a mold into which a molten steel is poured, the method comprising:
providing a plurality of temperature measurers at predetermined intervals along a width direction of a mold, the temperature measurers including a first edge temperature measurer, a center temperature measurer and a second edge temperature measurer disposed at one end portion, a center portion, and the other end portion of the mold, respectively;
providing a magnetic field generation unit outside the mold;
measuring temperature values in real-time using the temperature measurers, the measured temperature values including a first edge temperature value measured by the first edge temperature measurer, a center temperature value measured by the center temperature measurer and a second edge temperature value measured by the second edge temperature measurer;
analyzing the measured temperature values to detect a meniscus flow form;
classifying the detected meniscus flow form into one of a plurality of predetermined meniscus flow pattern types to determine a classified meniscus flow pattern type corresponding to the detected meniscus flow form; and
when the classified meniscus flow pattern type is abnormal, operating the magnetic field generation unit according to the classified meniscus flow pattern type so as to adjust an abnormal flow state to be normal.

2. The meniscus flow control method of claim 1 , wherein the analyzing comprises:
calculating a temperature differences between a maximum temperature value and a minimum temperature value among the measured temperature values; and
comparing whether or not the temperature difference is in a reference temperature range.

3. The meniscus flow control method of claim 1 , wherein the analyzing comprises: comparing the center temperature value with the first edge temperature value and the second edge temperature value, respectively.

4. The meniscus flow control method of claim 1 , wherein the analyzing comprises:
calculating temperature differences between the center temperature value and the first edge temperature value, and between the center temperature value and the second edge temperature value; and
comparing whether each of the temperature differences is in a reference temperature range.

5. The meniscus flow control method of claim 1 , further comprising: storing a plurality of predetermined meniscus flow pattern types,
wherein the classifying comprises: choosing one from the stored predetermined meniscus flow pattern types.

6. The meniscus flow control method of claim 1 , further comprising: storing a plurality of meniscus flow control types,
wherein the operating comprises: choosing one from the stored meniscus flow control types according to the classified meniscus flow pattern type.

7. The meniscus flow control method of claim 1 , wherein the analyzing comprises:
calculating a first temperature difference between a maximum temperature value and a minimum temperature value among the measured temperature values; and comparing whether or not the first temperature difference is in a first reference temperature range;
comparing the center temperature value with the first edge temperature value and the second edge temperature value, respectively; and
calculating second temperature differences between the center temperature value and the first edge temperature value, and between the center temperature value and the second edge temperature value; and comparing whether each of the second temperature differences is in a second reference temperature range.

Assignees

• Posco

Inventors

• Han Sang Woo
• Jin Seon Yong
• Cho Hyun Jin

Classifications

• B22D11/186

  by using electric, magnetic, sonic or ultrasonic means · CPC title

• B22D11/182

  by measuring temperature · CPC title

• B22D2/003

  for the level of the molten metal (B22D11/181 and B22D11/201 take precedence; level indicators in general G01F23/00) · CPC title

• B22D11/115

  by using magnetic fields · CPC title

• B22D11/18 Primary

  for pouring (B22D11/20 takes precedence) · CPC title