What are the properties of refractories?
Important properties of refractories include chemical composition, bulk density, apparent porosity, apparent specific gravity and strength at atmospheric temperatures. These properties are frequently among those which are used as ‘control points’ in the manufacturing and quality control process.
What are basic refractories?
Basic refractories are used in areas where slags and atmosphere are basic. They are stable to alkaline materials but can react to acids. The main raw materials belong to the RO group, of which magnesia (MgO) is a common example. Other examples include dolomite and chrome-magnesia.
Which is basic refractory material?
Dolomite is a basic refractory material. Quartz and Sand are Acidic refractory material, SiO2 is the main constituent. Silicon carbide is a special type of refractory material. They are used for special applications.
What is refractory material state its basic properties?
Refractories are inorganic nonmetallic material which can withstand high temperature without undergoing physico – chemical changes while remaining in contact with molten slag, metal and gases. It is necessary to produce range of refractory materials with different properties to meet range of processing conditions.
What are refractories how are they classified discuss their properties and uses?
Refractories are classified according to their physical form. These are the shaped and unshaped refractories. The shaped is commonly known as refractory bricks and the unshaped as monolithic refractories. Shaped refractories are those which have fixed shapes when delivered to the user.
How are refractories manufactured?
This process involves using an electric arc furnace to melt the refractory raw materials, then pouring the melted materials into sand-forming molds. Another type of refractory process is ceramic fiber production. In this process, calcined kaolin is melted in an electric arc furnace.
What are refractories describe its classification?
What are the requirements of a good refractory material?
A good refractory should have high RUL value. It is defined as the ratio of its pore volume to the bulk volume. Porosity is an important property of refractory bricks, because it affect many other characteristics like chemical stability, strength, abrasion- resistance and thermal conductivity.
What is refractories and its classification?
What is the meaning of refractory material?
Refractories are materials that are resistant to high temperature, used predominantly as furnace linings for elevated temperature materials processing and other applications in which thermomechanical properties are critical.
Which properties of each of the major refractory metals define their most useful applications?
Refractory metals have high melting-points, with Tungsten and Rhenium the highest of all elements, and the other’s melting points only exceeded by osmium and iridium, and the sublimation of carbon. These high melting-points define most of their applications.
What are the refractories give two essential properties of a good refractory material?
A good refractory material should have the following properties:
- It should be able to withstand high temperatures generated in the furnace.
- It should be able to withstand sudden alternating heating and cooling, i.e., thermal shocks.
- It should be able to withstand abrasion and rough usage.
What are the properties of the refractory material?
Most common properties of the refractory material are listed below. The refractory materials commonly characterized by their physical properties. 1. Bulk density It is a general indication of product quality.
Why choose Rs basic refractory factory?
Rongsheng Kiln Refractory Company is a professional basic refractory supplier with advanced production line and production technology who can produce good quality basic refractory bricks and amorphous basic refractory. Since RS Basic Refractory Factory is located near the raw materials, the price of the basic refractory is relatively low.
What is basic refractory brick?
The most commonly used basic refractory brick is magnesite brick with the strong resistance to alkaline slag and iron slag. The basic refractory is applied in converter lining and hearth furnace bottom. If you are in need of high quality basic refractory, please email Rongsheng Kiln Refractory Company! We will offer you cheap basic refractory.
What is bulk density of a refractory?
It is a measure of the weight of a given volume of the refractory. For many refractories, the bulk density provides a general indication of the product quality. It is considered that the refractory with higher bulk density (low porosity) is better in quality.