International Journal of Scientific & Engineering Research, Volume 6, Issue 8, August-2015 ISSN 2229-5518 IJSER © 2015 http://www.ijser.org Oil Fired Furnace and Induction Furnace: A Review Bhaskar Dhiman, O.S. Bhatia Abstract— Heat treatment is the linked process for treatment of machined and forging components. Furnaces can be used for heat treatment process. We have observed that the major problems in oil-fired furnace are non-uniform flame distribution, oxidation of metal, scale formation, carbon loss of metals and emission of pollutants. Oil fired furnaces have low productivity and long start-up time. To avoid these problems the new technology induction furnace should be used. By using the induction furnace instead of oil fired furnace the productivity may be increased and production cost may be reduced. So it is necessary to design, optimize and install the induction furnaces over the oil fired furnaces. This paper presents the reviews on latest trends and developments available in the area of furnaces so that the total equipment cost and losses can be minimized. Index Terms— Design, Electromagnetic Induction, Furnace, Induction Furnace, Joule Effect, Oil Fired Furnace, Productivity. ——————————  —————————— 1 INTRODUCTION furnace is an equipment used to melt metals for casting or to heat materials to change their shape (e.g. forging, rolling) or properties (heat treatment) [45], [52], [49]. Since exhaust gases from the fuel comes in contact with the surface of materials. Then type of fuel used is important be- cause some materials will not tolerate sulphur in the fuel. Sol- id fuels generate particulate matter, which will interfere the materials placed inside the furnace. For this reason most fur- naces use liquid fuel, gaseous fuel or electricity as energy in- put. Melting furnaces for nonferrous materials use fuel oil. Furnace ideally should heat as much of material as possible to a uniform temperature with the least possible fuel and la- bour.The key to efficient furnace operation lies in complete combustion of fuel with minimum excess air. Furnaces operate with relatively low efficiencies (as low as 7%) compared to other combustion equipment such as the boiler (with efficien- cies higher than 90%). This is caused by the high operating temperatures in the furnace. For example, a furnace heating materials to 1200 °C will emit exhaust gases at 1200 °C or more, which results insignificant heat losses through the chimney. Steel is a part of our everyday life, in both the developed and developing world [50]. Now-a-days demand of steel is increasing due to increase in infrastructure and globalization. Natural gas fired furnaces have installation cost advantage and induction furnaces have the advantage of less scale for- mation on the surface of the work. In present world customers are more conscious about the quality of steel mean slower lev- els of residuals such as sulphur, phosphorus, oxygen, hydro- gen, nitrogen and tramp elements. The quality steels are most efficiently produced in electric furnaces (EAF / IF), because they have proved its worthiness in production of a wide varie- ty of special alloy steels having controlled chemistry and be ter deoxidation procedures. 1.1 Oil Fired Furnace This furnace is mounted on two pedestals above the floor lev- el. For pouring the molten metal, the furnace is rotated by the geared hand wheel [46], [47], [49]. Oil and air are admitted with pressure through a nozzle. The crucible is placed in the heating chamber and is heated by the flame. The furnace can be stopped whenever needed & temperature can be controlled easily. They give lesser pollution. However, improvements in efficiencies have been brought about by methods such as pre- heating of stock, preheating of combustion air and other waste heat recovery systems. Oil-fired furnaces mostly use furnace oil, especially for reheating and heat treatment of materials. Light diesel oil (LDO) is used in furnaces where sulphur is undesirable. Fig. 1. Oil Fired Furnace [51] A ———————————————— x Bhaskar Dhiman, M. Tech student of Mechanical Engineering (specialize in Production Engineering), Green Hills Engineering College Solan, India. E-mail: bhaskaradhiman@gmail.com x O.S Bhatia, Professor in Mechanical Engineering Department, Green Hills Engineering College Solan, India. E-mail: onkarnimish@gmail.com 602 IJSER