JPS5655802A - Detecting method for thickness of refractory lining in induction furnace - Google Patents

Detecting method for thickness of refractory lining in induction furnace

Info

Publication number
JPS5655802A
JPS5655802A JP13254679A JP13254679A JPS5655802A JP S5655802 A JPS5655802 A JP S5655802A JP 13254679 A JP13254679 A JP 13254679A JP 13254679 A JP13254679 A JP 13254679A JP S5655802 A JPS5655802 A JP S5655802A
Authority
JP
Japan
Prior art keywords
taps
induction coil
refractory lining
voltage
thickness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13254679A
Other languages
Japanese (ja)
Inventor
Shizuo Hayashi
Hiroshi Otsuka
Hiroyuki Ito
Kiyokazu Kawanishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP13254679A priority Critical patent/JPS5655802A/en
Publication of JPS5655802A publication Critical patent/JPS5655802A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable detection of the local thickness of the refractory lining as well by a method wherein a plurality of taps are provided on an induction coil and the partial unity power factor of the induction coil is detected from the voltage between the taps and from the current flowing through the induction coil.
CONSTITUTION: A plurality of taps v1Wv6 are provided on the induction coil 3 and the voltage between the desired adjacent taps is taken out by a switching apparatus 8. The voltage between the taps taken out by the operation of the switching apparatus 8 is inputted in a power-factor meter 6 through the intermediary of a single-phase transformer 5. The current is inputted in the power-factor meter 6 from a current transformer 4. The unity power factor measured in this way is detected from the voltage between the taps and from the current flowing through the induction coil 3, and the partial thickness of the refractory lining of the induction coil which is detected along with the detection of the unity power factor is indicated by an indicator 8. Thus, the local thickness of the refractory lining can also be detected.
COPYRIGHT: (C)1981,JPO&Japio
JP13254679A 1979-10-15 1979-10-15 Detecting method for thickness of refractory lining in induction furnace Pending JPS5655802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13254679A JPS5655802A (en) 1979-10-15 1979-10-15 Detecting method for thickness of refractory lining in induction furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13254679A JPS5655802A (en) 1979-10-15 1979-10-15 Detecting method for thickness of refractory lining in induction furnace

Publications (1)

Publication Number Publication Date
JPS5655802A true JPS5655802A (en) 1981-05-16

Family

ID=15083804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13254679A Pending JPS5655802A (en) 1979-10-15 1979-10-15 Detecting method for thickness of refractory lining in induction furnace

Country Status (1)

Country Link
JP (1) JPS5655802A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870359A (en) * 1986-06-18 1989-09-26 Ngk Insulators, Ltd. Method for measuring the thickness of a ceramic tubular molded body
JPH05223514A (en) * 1992-02-07 1993-08-31 Nippon Steel Corp Method and apparatus for detecting ground metal adhering to inner lining refractory of container for moltem metal and effective thickness of the refractory
US5523685A (en) * 1992-02-07 1996-06-04 Nippon Steel Corporation Method and apparatus for detecting penetrant metal and measuring thickness of refractory lining

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870359A (en) * 1986-06-18 1989-09-26 Ngk Insulators, Ltd. Method for measuring the thickness of a ceramic tubular molded body
JPH05223514A (en) * 1992-02-07 1993-08-31 Nippon Steel Corp Method and apparatus for detecting ground metal adhering to inner lining refractory of container for moltem metal and effective thickness of the refractory
US5523685A (en) * 1992-02-07 1996-06-04 Nippon Steel Corporation Method and apparatus for detecting penetrant metal and measuring thickness of refractory lining

Similar Documents

Publication Publication Date Title
JPS5733355A (en) Digital speed detector
JPS5655802A (en) Detecting method for thickness of refractory lining in induction furnace
ES8900066A1 (en) Method for testing metallic components, particularly in nuclear installations, by means of eddy currents.
JPS5229800A (en) Apparatus for detecting effluence of slag in molten metal
JPS5330048A (en) Induction furnace molten metal leaks detector
JPS5438518A (en) Magnetic shield for electric induction
JPS5455496A (en) Current seam
JPS54141307A (en) Control unit for induction melting furnace
JPS53146202A (en) Method and apparatus for melting and refining steel material
JPS568562A (en) Measuring device for reactance change
JPS5240754A (en) One phase omission detector for three phase alternating current
JPS5269036A (en) Controller of inductive heating
JPS52150311A (en) Method and equipment for detecting furnace condition of arc furnace
JPS54134842A (en) Induction heating system
JPS53140249A (en) Method and apparatus for welding
JPS5399445A (en) Three-phase ac power unit
JPS5610214A (en) Detecting method for liquid metal level
JPS55152453A (en) Flaw detector with magnetic particle
JPS5529740A (en) Detecting method for nodule of steel fiber contained in concrete
JPS533883A (en) Eddy current inspecting apparatus
LYNCH et al. Measurement of eddy current conductivity(metal conductivity)
JPS55428A (en) Liquid level meter
JPS51130840A (en) Method for detecting electric insulation leakage
JPS53111758A (en) Device for measuring thickness of fire-resistant material of induction furnace
JPS56141548A (en) Device for deciding electric resistance change rate of cast iron