What is the thickness of refractory lining?
between 80 mm and 300 mm
Refractory lining is one of the most important things to look for during the installation. A professionally placed lining will increase the lifetime of the furnace and lower the energy costs. In general, refractory lining thickness is in between 80 mm and 300 mm.
What is the thickness of refractory lining in blast furnace?
650 mm.
The refractory lining thickness of the blast furnace is in use as 650 mm. Stave material used such as aluminium and copper.
What does refractory lining mean?
One particular refractory product to consider is the refractory lining, which is a protective layer inside the kiln or furnace that acts as a form of insulation to withstand high temperatures. It can also protect the structure from thermal shocks, abrasion and chemical attack.
What is the refractory lining of blast furnace?
A modern blast furnace (BF) is refractory lined to protect the furnace shell from the high temperatures and abrasive materials inside the furnace….Refractory lining of blast furnace.
| Tab 2 Blast furnace refractories | ||
|---|---|---|
| Tilting spout | High alumina / SiC ramming masses / Low cement castables | High alumina / SiC / Carbon / ULCC |
Why is refractory lining necessary?
The refractory lining is a protective layer in industrial furnaces, playing a role in high temperature resistance and protecting the structure from thermal shock, wear and erosion. The refractory lining of the furnace is usually made of refractory brick masonry.
Which material is used for refractory lining in a furnace?
Refractory materials The oxides of aluminium (alumina), silicon (silica) and magnesium (magnesia) are the most important materials used in the manufacturing of refractories.
What are the general requirements of a refractory material?
The general requirements form the refractories are (i) ability to withstand high temperatures and trap heat within a limited area like a furnace, (ii) ability to withstand sudden changes of temperature, (iii) ability to withstand load at service conditions, (iv) ability to withstand chemical and abrasive action of the …
What is the best refractory material?
Hafnium carbide is the most refractory binary compound known, with a melting point of 3890 °C. The ternary compound tantalum hafnium carbide has one of the highest melting points of all known compounds (4215 °C).
What are three different types of refractories?
Depending on temperatures and service conditions of the applications such as boilers, furnaces, kilns, ovens etc, different types of refractories are used.
- Fireclay refractories.
- Silica brick.
- High alumina refractories.
- Magnesite refractories.
- Chromite refractories.
- Zirconia refractories.
What is the fusion temperature of normal refractory?
Fusion Temperatures ‘Normal’ refractories perform in the range of around 1,500 to 1,800 °C; ‘high’ refractories from approximately. 1,800 to 2,000 °C; and super refractories are those with a fusion temperature in excess of 2,000 °C.
What is a good refractory material?
The most common basic refractories are Magnesite, Dolomite, lime etc. But lime, because of its dehydrating tendency is never used as a refractory. Magnesite: This is most important basic refractory material.
What is a refractory lining?
A refractory lining usually comprises a safety or backup layer behind the working lining in contact with the furnace contents. The whole body is encased in a metal shell.
What do you need to design a refractory structure?
Essential to the designer of refractory structures is a knowledge of the mechanical properties of materials to be used (e.g. thermal expansion, thermal conductivity, Young’s modulus and ultimate strength). Standard test methods do not necessarily give the most useful data.
Why is anchor design important in refractory lining?
When designing a refractory lining for an industrial application, anchor design becomes one of the most important factors in creating an improved lining that is supported properly. In particular, the tips of the anchors experience the highest temperatures because they are closest to the hot face and thus become an important consideration.
What is the condition of the refractory lining of an oxygen converter?
During the blow, the refractory lining of an oxygen converter is under arduous conditions of aggressive slag and iron melt, oxidizing atmosphere and high temperature. The lining wear is most serious in the zone in contact with the slag.
