Determination of the optimal frequency of reversing the flame of open-hearth furnaces

Metallurgist ◽  
1964 ◽  
Vol 8 (5) ◽  
pp. 241-242
Author(s):  
N. K. Korneva ◽  
G. A. Dorofeev ◽  
I. P. Grinevich ◽  
E. B. Vinokurov
Keyword(s):  
Open Hearth ◽  
Optimal Frequency

scholarly journals Determination of Optimal Frequency to Replace Cutting Elements in Chain Trenchers

2021 ◽  
Vol 1118 (1) ◽  
pp. 012026
Author(s):  
S M Kravchenko ◽  
V A Slepchenko ◽  
I V Slepchenko
Keyword(s):  
Optimal Frequency

Determination of the optimal open-hearth campaign with respect to the checkerwork in the case of blowing the bath with oxygen

Metallurgist ◽  
1976 ◽  
Vol 20 (8) ◽  
pp. 545-548
Author(s):  
S. E. Rozin ◽  
M. I. Esin ◽  
A. A. Krivosheiko ◽  
V. M. Fedchenko ◽  
M. K. Musikhina ◽  
...  
Keyword(s):  
Open Hearth

scholarly journals Preliminary Determination of the Optimal Parameters When Using an Ultrasonic Probe to Measure Cavern Geometry Where a Metal Borehole Pipe Is Present

Acoustics ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 425-441
Author(s):  
Kubacka Tomasz ◽  
Nguyen Dinh Chau
Keyword(s):  
Metal Plate ◽  
Ultrasonic Waves ◽  
Optimal Parameters ◽  
Optimal Frequency ◽  
Ultrasonic Probe ◽  
Ultrasonic Signals ◽  
Metal Pipe ◽  
Transmitted Waves ◽  
Metal Plates

In order to determine the optimal parameters when using an ultrasonic probe to measure cavern geometry when a metal borehole pipe is present, an investigation was firstly carried out on influence of a vertical metal plates with a thickness from 1 mm to 15 mm immersed in water on transmitted and reflected ultrasonic waves. The results obtained will be used as an indicator for the measurement of underground geometry in which the ultrasonic probe is placed inside a metal pipe lining a borehole. These studies were performed both by experiment and computer simulation. The results show that the wavelength of the incident ultrasonic signals should be equal to half the thickness of the metal plate or an integer times smaller than this thickness. When the thickness of the barrier is unknown, an ultrasonic signal with linear frequency modulation (LFM) should be used. Due to the reverberation of the ultrasonic waves inside the pipe for caverns filled with water, the distance from the transducer to the cavern wall can be measured if it is longer than three times of the pipe diameter. Frequency analysis of both the reflected and the transmitted waves enables an optimal frequency of the incident ultrasonic wave to be selected, which can be used in the measurement of cavern geometry in conditions in which the ultrasonic probe is inside a metal pipe.

Sign in / Sign up

Export Citation Format

Share Document