Alumina-silica composite, Mechanical Engineering

Alumina-Silica Composite

 This composite is an especially usual refractory material. Due to easy availability and low cost aluminia-silica composite is extensively utilized in industry today. From pure alumina to pure silica, the percentage composition might vary. Fireclay is created along with alumina varying from 20 to 40 percent. Among these limits of alumina and depending on degree of firing four classes of fireclay are acquired. They are medium duty, super duty, high duty and low duty. Fireclay is utilized in form of bricks. Pure silica brick is usually acid. Within composite of silica-alumina the acidic nature varies to neutral along with increasing proportion of silica. Acidic fireclay along ith high alumina content in between 50-99% has high fusion temperature than fireclay bricks. They are employed for more severe furnace condition. The acidic fireclay bricks are more expensive.

Basic refractories consist mostly of magnesia or MgO and lime or CaO, chrome ore or mixture of two or more of these materials. Basic bricks have superior density, high melting point temperature and fine resistance to chemical attach via basic slag and oxides. Such refractories, containing 92 to 95 percent magnesia are utilized as linings in the basic oxygen steel making furnace. Though, refractories are costlier.

 

Posted Date: 2/27/2013 1:52:56 AM | Location : United States







Related Discussions:- Alumina-silica composite, Assignment Help, Ask Question on Alumina-silica composite, Get Answer, Expert's Help, Alumina-silica composite Discussions

Write discussion on Alumina-silica composite
Your posts are moderated
Related Questions
the component of computer integrated manufacturing with the diagram

Q. What is Issued for Approval? This initial formal issue of the P&IDs to the Customer incorporates the process development agreed to in the approved IFD level PFDs. In additi

Two similar heavy spheres of 50mm radius are in equilibrium within a smooth cup of 150mm radius. Give that the reaction between the cup of one sphere is just double than that betwe




Jib crane Mechanism: Sol.: Jib crane is taken in use to raise heavy loads. A load W is lifted up by pulling the chain through pulley D as shown in the adjacent figure.

what type of stresses a thin cell is subjected to?

Explain the Evaluation Phase of auger shaft Evaluation Phase of auger shaft Steps: 1. To judge the ideas generated in the creation phase for ability to meet the required

Punches Figure: Punches A bar which carries a sharp point at one end and used to make a permanent mark on a part is called punch. The point is hard and tempered so tha