Alumina-silica composite, Mechanical Engineering

Assignment Help:

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.

 


Related Discussions:- Alumina-silica composite

Development of coated electrodes, DEVELOPMENT OF COATED ELECTRODES C...

DEVELOPMENT OF COATED ELECTRODES Can welding be done by bare wire? Why do we require coating at all? What are the different types of coating? What are the stages in

Expected service life of a component, Q. Expected service life of a compone...

Q. Expected service life of a component in high temperature environment? The expected service life of a component in a high temperature environment is limited by either the mat

Simple bending or pure bending of beam, Q:   What is simple bending or pure...

Q:   What is simple bending or pure bending of beam?                                            Sol.: If portion of beam is subjected to the constant bending moment only and

Describe inversion and mechanism, Describe Inversion and Mechanism. Illustr...

Describe Inversion and Mechanism. Illustrate in detail all inversions of 4-Bar chain Mechanism. (a) Explain all the types of constrained motion with examples. (b) Explain in

Derive mathematical equation for bernoulls equation, Derive mathmatical equ...

Derive mathmatical equation for Bernoull's equation, what are the application of Bernoull's equation and illustrate any one.

Heat exchangers for plant design, Q. Heat exchangers for plant design? ...

Q. Heat exchangers for plant design? All exchangers shall be arranged to be readily dismantled for cleaning and maintenance. Cooling and heating streams generally flow against

Necessity of lubrication , Necessity of Lubrication To lubricate t...

Necessity of Lubrication To lubricate the various parts of engine. The supplementary function of lubrication is to cool and clean the engine parts. To prevent en

Stress analysis, Figure shows rough sketch of a selected representative cri...

Figure shows rough sketch of a selected representative critical part of a "Quick Coupler" (of an earth moving equipment) made with cast steel.  You need to perform FEA analysis to

Governor, Use of hartung governor

Use of hartung governor

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd