refractory

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refractory

1. Med not responding to treatment
2. (of a material) able to withstand high temperatures without fusion or decomposition
3. a material, such as fireclay or alumina, that is able to withstand high temperatures: used to line furnaces, kilns, etc.

refractory

[ri′frak·trē]
(materials)
A material of high melting point.
The property of resisting heat.
(medicine)
Not readily yielding to treatment.

Refractory

One of a number of ceramic materials for use in high-temperature structures or equipment. The term high temperatures is somewhat indefinite but usually means above about 1830°F (1000°C), or temperatures at which, because of melting or oxidation, the common metals cannot be used. In some special high-temperature applications, the so-called refractory metals such as tungsten, molybdenum, and tantalum are used. See Ceramics

The greatest use of refractories is in the steel industry, where they are used for construction of linings of equipment such as blast furnaces, hot stoves, and open-hearth furnaces. Other important uses of refractories are for cement kilns, glass tanks, nonferrous metallurgical furnaces, ceramic kilns, steam boilers, and paper plants. Special types of refractories are used in rockets, jets, and nuclear power plants. Many refractory materials, such as aluminum oxide and silicon carbide, are also very hard and are used as abrasives; some applications, for example, aircraft brake linings, make use of both characteristics.

Refractory materials are commonly grouped into (1) those containing mainly aluminosilicates; (2) those made predominantly of silica; (3) those made of magnesite, dolomite, or chrome ore, termed basic refractories (because of their chemical behavior); and (4) a miscellaneous category usually referred to as special refractories.

refractory

A material, usually nonmetallic, used to withstand high temperatures.
References in periodicals archive ?
Performing the repair of the refractory lining of heat treatment facilities located in the Waste Treatment Center of The Zoreda, and the supply of key materials needed in the development of such service.
The Ceramics division is the world leader in the supply of advanced flow control and refractory products and systems to the iron and steel industry and is also a leading supplier of refractory lining materials for iron and steelmaking and other industrial processes.
Tenders are invited for Ladle Refractory Lining Bricks For Lfvd Ladle 20 Ton Capacity As Per Drg.
A complete evaluation of the entire system by Kuttner engineers led to other upgrades that ultimately increased cupola efficiency, such as installing a 1,000F hot blast recuperator, redesigning the water cooled tuyeres and adding a new melt zone refractory lining to make the coke combustion and melting process more cost-effective.
The scope of the 42-day reline included replacement of the brick and refractory lining, installation of a new tuyere jacket, replacement of copper mantle plates and copper stack cooling plates, improvements to the water distribution system and repairs to the gas cleaning system.
Products from this plant are shipped to Manistee, Michigan, for further processing into refractories products, and directly to customers in the steel industry as a fluxing agent to help purify steel and extend refractory lining life.
Tenders are invited for Annual running or emergency repair works of refractory lining of producer and boilers in gas plant of ffp.
Without a refractory lining, the heat loss from the furnace to the water cooling system was a significant factor in the furnace's low thermal efficiency.
The scope of the reline includes replacement of the brick and refractory lining, installation of a new tuyere jacket, replacement of copper mantle plates and copper stack cooling plates, improvements to the water distribution system and repairs to the gas cleaning system.
The environmentally friendly and fuel flexible CFB boiler has an integrated water/steam-cooled separator that is made with flat walls constructed from conventional water/steam-cooled membrane panels and covered with a thin refractory lining.
Further, if ABC decided to engage a refractory consultant to assist with the research on refractory lining options for the furnace, a percentage of these costs would qualify, as would the cost of any supplies that were purchased for this project.