Induction Furnace Spares

Product Details:

BASIC INTRODUCTION

In induction furnaces working face of the main crucible is lined with a suitable ramming mass. Furnace performance is directly related to the
lining performance. Well-stabilized lining results in smooth working of furnace, optimum output and better metallurgical control. The lining practice best suited to particular foundry will depend upon the furnace capacity and design, metal being melted and output etc.

Requirement Of A Proper Lining:

• Thermal characteristics: it should withstand the stresses developed by the thermal cycle in operation.
• It should be chemically insert to the metal being melted: chemical inertness to molten metal can be achieved by using acid lining for acid slag & basic lining for basic slag.
• It should have enough structural strength to withstand operating conditions.
• The thickness of refractory lining must be such as to ensure good electrical efficiency and thick enough to counter the risk of unexpected failure and major damage to the coil.
• It should have high erosion resistance.
• It should have low thermal & electrical conductivity.
• It should have proper hardening characteristic.
• It should have easy installation procedure.
• It should be easily repairable, economical & posses ease of knocking/removal.

COMPARISON MANUAL LINING V/S LINING USING VIBRATOR BASIC LINING PROCEDURE

Bottom Lining

• Pour the ramming mass in the bottom to the extent and level the ramming mass.
• Start the ramming with bottom lining vibrator. Continue ramming till layer becomes hard. Keep on introducing layers of proper thickness and repeat the process till required level is attained.
• Care has to be exercised not to allow antenna rod to bend during bottom lining installation.

 

Product Details:

Water cooled resistor having been originally designed for thyristor protection circuit. Where water cooling is available and space limited. The withdrawal of heat, internally & externally ensure a low temperature gradient across the unit reducing internal stress.

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Maximum precaution is taken to insure that the first layer of insulation is applied to the accurate amount of thickness and properly cured before the second coat is applied. If the first coating is too thick or not properly cured, “outgassing” can occur, causing turn to turn arcing and premature failure of the coil. Special high-voltage electrical tests are carried out on the entire coil to insure the integrity of the insulation. Lebond 2216 has been heated to 450°F and subjected to high voltage non-destructive tests [up to 6000 Volts DC] with no indication of failure. Flexocoat lebond 2216 for coating induction coils of electric induction furnace, it has excellent adhesion on copper and stainless steel desired flexibility to withstand cooling and heating cycles normally encountered during operation of furnaces and provides electrical resistance to voltage developed between the coils to protect from sparking, upto approximately 400 volts / mill. Thickness of coating.

Product Details:

Insulation pad is a set of insulating layers placed between the coil and the yokes of an induction furnace which are used to isolate them. Lawatherm provides insulation pads in different types with special properties and applications. The following images show compositions and layers of provided insulation pads by this company. 

It is a epoxy paint having excellent adhesion, very good electrical & Mechanical properties include thermak shock resistance coupled with long durability. Available in 1 kg pack ex stock. Applications: This coating is mainly used to insulate the coil of Induction Furnace, It has excellent adhesion on copper and stainless steel with desire flexibility to withstand cooling and heating cycles normally encountered during operation of furnaces and provides electrical resistance to voltage developed between coil turns to protect from sparking.

Product Details:

An Lawatherm Furnace Shunt Lamination Yoke is a magnetic core made from laminated steel plates or other magnetic materials. It is strategically placed around the induction coil to guide the magnetic field and prevent leakage, ensuring that the electrical energy produced by the furnace is effectively used for steel melting

Product Details:

Laminated Yokes are manufactured using the best grade raw materials by experienced engineers suitable for any type of induction furnace such as electrotherm, megatherm or inductotherm.

Lawatherm is manufacturing syndino products in various size and shapes of sheet, rod, spacer, segment, half round syndino turn, top & bottom. These sheets are available in various sizes from 2mm to 75mm.

Composition

Lawatherm consist of asbestos fiber and cement formed into fully compressed boards under high pressure, mechanically strong, these boards possess good arc and heat resisting characteristics are used for thermal insulation as well aselectrical insulation.

Application

• Insulation of high temperature heated platens and moulds in hydraulic and presses
• High temperature insulation of electrode arm in arc furnaces and ladle furnaces
• High temperature insulation between coil and crucible in induction furnaces
• Insulation in dynamic braking resistors used in locomotives
• Applications requiring high voltage resistance at high temperatures

 

 

Product Details:

Product Details:

Insulating pads are available in 2" and 4" thicknesses. These pads are made from a closed cell foam poly material that provides excellent insulating qualities and resists moisture absorption.