What is lining of induction furnace?
Silica is the most commonly used lining material for induction furnace since it has the following advantages. There is a dense sintered layer at the face which is in contact with liquid metal. The tightness of the sintered ensures no infiltration of liquid metal in the lining.
What is the lining of a furnace made of?
The most commonly used furnace lining materials are ceramic compounds and metal/ceramic combinations. Ceramic lining materials are made from a variety of raw materials each with its own particular strengths. Common ceramic furnace lining materials include aluminum oxide, magnesite, silicon carbide, and dolomite.
What is induction furnace in manufacturing process?
In the induction furnace, a coil carrying alternating electric current surrounds the container or chamber of metal. Eddy currents are induced in the metal (charge), the circulation of these currents producing extremely high temperatures for melting the metals and for making alloys of exact composition.
Which refractory is used in induction furnace?
Refractory linings used in induction furnace are commonly made of acidic (Silica) or basic (Magnesia) compounds. Choosing the right refractory material for a given melting or holding application is important.
What is neutral lining?
Neutral lining has advantage over both silica and basic lining in terms of chemical reaction and thermal shock resistance. The ramming refractory mass used for neutral lining in the induction furnace consists mainly of Al2O3 with the addition of MgO in the matrix which results in in-situ formation of spinel (Al2O3.
What is refractory material used for?
Refractory materials are used in furnaces, kilns, incinerators, and reactors. Refractories are also used to make crucibles and moulds for casting glass and metals and for surfacing flame deflector systems for rocket launch structures.
What is the lining of a high temperature furnace made of?
Ceramic fiber is a kind of high temperature insulation materials with low thermal conductivity, Nowadays, they are widely used in all kinds of industrial furnace systems which has changed most furnace lining design as a efficient energy saving and high temperature resistance material.
Why are ceramics used for furnace lining?
The main purpose of ceramic board is to protect components that are sensitive to heat and are vital to daily operations. Without this material, these components will suffer degradation and will ultimately bring the entire operation to a halt.
What is sintering heat in induction furnace?
Vacuum sintering means that metal, alloy or metal compound powder is sintered into metal products and metal billets at the temperature below the melting point under the condition of vacuum degree of (10 ~ 10-3 Pa).
What is a refractory liner?
Refractory lining is basically a protective layer installed inside the furnace to protect the steel structure from high temperatures. Refractory bricks or monolithic refractories can be used for refractory lining.
What is the importance of lining in induction furnace?
Lining is the important part of induction furnace. Furnace performance is directly related to the performance of its lining. Well laid and stabilized lining results in smooth working of furnace, optimum output, and good control of the metallurgical reactions.
What is refractory lining of induction furnace?
Refractory lining is consumable material which gets damaged during the operation of the induction furnace. The number of heats the lining last is known as lining life. When a certain amount of damage occurs, induction furnace operation is to be interrupted for repair or replacement of the refractory lining.
What is the best lining material for induction furnace?
The most commonly used lining material for induction furnace is acidic lining. It normally consists of high purity silica ramming mass. Silica ramming mass is used for melting carbon steels with carbon content higher than 0.1 %. It is produced by calcining, crushing and grading of the white crystalline quartz containing 99.90 % of SiO2.
How to repair erosion of induction furnace?
In case of erosion of side walls, the worn section of the induction furnace can be repaired by using dry monolithic lining behind a part former. The former is to be slightly less than original diameter of the lining. Because of slag-line erosion grooves are formed at the slag level in the induction furnace.