JP5690230B2 - 連続鋳造用モールドパウダーの溶融層厚み測定方法 - Google Patents
連続鋳造用モールドパウダーの溶融層厚み測定方法 Download PDFInfo
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- JP5690230B2 JP5690230B2 JP2011142016A JP2011142016A JP5690230B2 JP 5690230 B2 JP5690230 B2 JP 5690230B2 JP 2011142016 A JP2011142016 A JP 2011142016A JP 2011142016 A JP2011142016 A JP 2011142016A JP 5690230 B2 JP5690230 B2 JP 5690230B2
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- 239000000843 powder Substances 0.000 title claims description 311
- 238000000034 method Methods 0.000 title claims description 38
- 238000009749 continuous casting Methods 0.000 title claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 80
- 239000010959 steel Substances 0.000 claims description 80
- 238000005259 measurement Methods 0.000 claims description 61
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 112
- 238000012360 testing method Methods 0.000 description 14
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000000926 separation method Methods 0.000 description 9
- 238000013480 data collection Methods 0.000 description 5
- 230000005499 meniscus Effects 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000011088 calibration curve Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001831 conversion spectrum Methods 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 238000003908 quality control method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Continuous Casting (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
・位相情報と絶対値情報を得る計測データ収集工程
・計測データ収集工程で収集した計測データを補正する補正工程
・補正工程にて補正したデータに基づきパウダー溶融層厚みを演算する演算工程
連続鋳造時におけるパウダー溶融層厚みの測定を連続的に可能とするために、
例えばパウダーの粉体部分と溶融層の界面でのマイクロ波の反射が明瞭に得られない場合における、連続鋳造時のパウダー溶融層厚み測定方法であって、
前記モールドパウダーの粉体部分と溶融層のマイクロ波の反射による溶鋼の湯面レベル測定値L1と、渦流センサーによる溶鋼の湯面レベル測定値Lの差ΔL1(=L1−L)と、検尺棒を用いて測定した実際のパウダーの溶融層厚みの相関を予め求めておき、
この予め求めておいた相関に基づいて、パウダー溶融層厚みを得ることを最も主要な特徴としている。
先ず、本発明の新しい着想から課題解決に至るまでの経過について説明する。
以下、請求項1に係る発明の連続鋳造用パウダーの溶融層厚み測定方法について説明する。
発明者らは、図1に示す試験装置を使用してパウダー投入厚みとマイクロ波出力値変化の関係を調査した。なお、マイクロ波出力値とは、パウダーの表面や図1の試験装置を構成する箱の底面で反射した反射波の形状、強度、及び帰還時間を言う。
図2をベースにパウダー溶融層厚み変化の試算原理を説明する。
マイクロ波によるパウダー溶融層厚み測定中に、検尺棒を用いて実際のパウダー溶融層厚みを測定し、図8に示したような、前記ΔL2と実際のパウダー溶融層厚みの相関を取ることで、連続的にパウダー溶融層厚みを推定することが可能となる。
1a アンテナ
2 アンプ
3 データ収集用PC
4 箱
5 パウダー
11 渦流センサー
12 浸漬ノズル
13 溶鋼
14 鋳型
15 凝固シェル
16 パウダー
17 パウダー溶融層
Claims (2)
- モールドパウダーの粉体部分と溶融層の界面でのマイクロ波の反射が明瞭に得られない場合における、連続鋳造時のモールドパウダー溶融層厚み測定方法であって、
前記モールドパウダーの粉体部分と溶融層のマイクロ波の反射による溶鋼の湯面レベル測定値L1と、渦流センサーによる溶鋼の湯面レベル測定値Lの差ΔL1(=L1−L)と、検尺棒を用いて測定した実際のモールドパウダーの溶融層厚みの相関を予め求めておき、
この予め求めておいた相関に基づいて、モールドパウダー溶融層厚みを得ることを特徴とする連続鋳造用モールドパウダーの溶融層厚み測定方法。 - モールドパウダーの粉体部分と溶融層の界面、および溶鋼の湯面でのマイクロ波の反射がそれぞれ明瞭に得られる場合における、連続鋳造時のモールドパウダー溶融層厚み測定方法であって、
前記モールドパウダーの粉体部分と溶融層のマイクロ波の反射による溶鋼の湯面レベル測定値L1と、モールドパウダーの粉体部分と溶融層の界面である溶融層の上面からのマイクロ波反射による上面レベル測定値L3の差ΔL2(=L1−L3)と、検尺棒を用いて測定した実際のモールドパウダーの溶融層厚みの相関を予め求めておき、
この予め求めておいた相関に基づいて、マイクロ波の反射により測定したモールドパウダーの溶融層厚みを校正することを特徴とする連続鋳造用モールドパウダーの溶融層厚み測定方法。
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JP2011142016A JP5690230B2 (ja) | 2011-06-27 | 2011-06-27 | 連続鋳造用モールドパウダーの溶融層厚み測定方法 |
PCT/JP2012/066284 WO2013002220A1 (ja) | 2011-06-27 | 2012-06-26 | 連続鋳造用モールドパウダーの溶融層厚み測定方法 |
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JP2014153077A (ja) * | 2013-02-05 | 2014-08-25 | Nippon Steel & Sumitomo Metal | 溶融金属の湯面上に浮遊するスラグの厚さ測定方法 |
AT517130A1 (de) * | 2015-04-29 | 2016-11-15 | Primetals Technologies Austria GmbH | Schlackedetektion in einem Verteiler einer Stranggießanlage |
AT517889B1 (de) * | 2015-10-28 | 2017-09-15 | Primetals Technologies Austria GmbH | Erfassung einer Gießspiegelhöhe in einer Kokille |
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JPS6146361A (ja) * | 1984-08-08 | 1986-03-06 | Sumitomo Metal Ind Ltd | Ccパウダ−溶融層厚測定装置 |
JPH02108444A (ja) * | 1988-10-18 | 1990-04-20 | Kawasaki Steel Corp | 連続鋳造の鋳型内における溶鋼浴面上のモールドパウダ溶融層厚の測定方法 |
JPH0318462A (ja) * | 1989-06-16 | 1991-01-28 | Kawasaki Steel Corp | 連続鋳造の鋳型内における溶鋼浴面上のモールドパウダ溶融層厚の測定方法および装置 |
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