THERMAL FATIGUE ANALYSIS OF INDUCTION MELTING FURNACE WALL FOR ALUMINA RAMMING MASS

Furnaces are most commonly used for melting of Iron and its various alloy materials. Induction furnaces are using electric power supply so they are more beneficial as no fuel is required. It is an extremely critical to find life span or life cycle of Induction Melting Furnace Wall under thermal load change conditions. The low cycle thermal fatigue life time L is depended upon various parameters like thickness of induction furnace refractory wall t, density of refractory material , inside film co-efficient outside film co efficient , thermal expansion coefficient outside temperature , specific heat of refractory material C, elasticity constant E, ultimate strength S, thermal conductivity of refractory material k, Volume V, time period of melting cycle τ. An expression for thermal fatigue life time of induction furnace melting wall is derived by dimensional analysis using bunkingham’s π theorem. Then the empirical correlation is derived from the data available from theory as well as experimental and numerical results.

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Development of Probability Concept for Thermal Fatigue Life Cycle Prediction

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.c1010.0393s20 ◽

2020 ◽

Vol 9 (3S) ◽

pp. 57-60

Keyword(s):

Life Cycle ◽

Induction Furnace ◽

Electrical Power ◽

Melting Furnace ◽

Furnace Wall ◽

Raw Material ◽

Induction Melting ◽

Minor Variation ◽

Refractory Wall ◽

Probability Concept

Furnaces are most commonly used for melting of Ferrous Metals and its alloy materials. Induction furnaces use Electrical Power so that they are more advantageous as no fuel is required. It is a very critical problem to find life span of Induction Melting Furnace Wall under thermal load variation. The life cycle of induction furnace refractory wall is a variable as minor variation is always present due to effect of skill of workers and many other factors. The life cycle of furnace wall will vary minor with some miscellaneous factors and cannot be justified as a single value always. The probability concept is utilized here in the forecast of life cycle calculation to justify the miscellaneous factors effected for the damage of the induction furnace refractory wall. The probability concept initially defines a minimum life of induction furnace wall for a certain case then it is assumed to vary with different probability as given below. So, all the cases of induction furnace wall are having minimum life always but some cases of induction furnace wall are having much longer life. It is due to effect from many miscellaneous factors like skills of workers, efficiency of workers, raw material quality used for construction of wall, tools applied for ramming of it, row material employed for melting, etc.

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An optimum design of the lining of a medium frequency induction melting furnace

International Transactions in Operational Research ◽

10.1016/s0969-6016(97)00020-8 ◽

1998 ◽

Vol 5 (4) ◽

pp. 255-259 ◽

Cited By ~ 1

Author(s):

P Sinha

Keyword(s):

Optimum Design ◽

Melting Furnace ◽

Induction Melting ◽

Medium Frequency

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Synthesis and Forming of Titanium Matrix Composites by Casting Route

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.334-335.297 ◽

2007 ◽

Vol 334-335 ◽

pp. 297-300

Author(s):

Si Young Sung ◽

Bong Jae Choi ◽

Young Jig Kim

Keyword(s):

Electron Microscopy ◽

Melting Furnace ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Matrix Composites ◽

Titanium Matrix ◽

Titanium Matrix Composites ◽

Electron Probe Micro Analyzer ◽

Transmission Electron

The aim of this study is to evaluated the possibility of the in-situ synthesized (TiC+TiB) reinforced titanium matrix composites (TMCs) for the application of structural materials. In-situ synthesis and casting of TMCs were carried out in a vacuum induction melting furnace with Ti and B4C. The synthesized TMCs were characterized using scanning electron microscopy, an electron probe micro-analyzer and transmission electron microscopy, and evaluated through thermodynamic calculations. The spherical TiC plus needle-like and large, many-angled facet TiB reinforced TMCs can be synthesized with Ti and B4C by a melting route.

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Thermal Fatigue Analysis of PBGA Packages in Automotive Environment

10.4271/980350 ◽

1998 ◽

Author(s):

Y.-H. Pao ◽

X. Song

Keyword(s):

Thermal Fatigue ◽

Fatigue Analysis

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Cycling Stability Performance of La0.75Mg0.25Ni3.5Si0.10 Hydrogen Storage Alloy in Discharge–Charge System

International Journal of Nanoscience ◽

10.1142/s0219581x14600035 ◽

2014 ◽

Vol 13 (05n06) ◽

pp. 1460003

Author(s):

Zhaojiang Liu ◽

Lei Huang ◽

Qi Wan ◽

Xu Li ◽

Ma Guang ◽

...

Keyword(s):

Hydrogen Storage ◽

Electrochemical Properties ◽

Melting Furnace ◽

Test System ◽

Cycling Stability ◽

Hydrogen Storage Alloy ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Stability Performance ◽

Charge Discharge

La 0.75 Mg 0.25 Ni 3.5 Si 0.10 hydrogen storage alloy was prepared by vacuum induction melting furnace and subsequently heated treatment at 940°C for 8 h and cooled to room temperature in the oven. The electrochemical properties of La 0.75 Mg 0.25 Ni 3.5 Si 0.10 compound were measured by LAND CT2001A battery test system. The morphologies of the samples were characterized by scanning electron microscopy (SEM). The surface state of samples was analyzed by X-ray photoelectron spectroscopy (XPS). It was found that the charge–discharge rate plays the key impact on the cycling stability of the alloy. During the cycle test, the prepared La 0.75 Mg 0.25 Ni 3.5 Si 0.10 compound presented an excellent capacity retention at the charge–discharge of 1 C while the capacity of sample declined rapidly at 0.2 C. The excellent cycling stability performance of La 0.75 Mg 0.25 Ni 3.5 Si 0.10 electrode at 1 C could be attributed to the less powder and less oxidation of surface effective active elements. The pulverization inevitably leads to the separation of the part of the cracking alloy and the electrode, resulting in reduction of the effective active substance and increasing attenuation of the capacity per cycle. In addition, on the analysis of the different cut-off potential effects on the electrode, it was found that the La 0.75 Mg 0.25 Ni 3.5 Si 0.10 electrode shows good comprehensive electrochemical properties at 1 C cut-off 0.6–0.7 V. During charging, heavy overcharge will not be conducive to cycling stability performance during the charging test.

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