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

Disc clutch friction thickness, Disc clutch friction thickness: Check disc...

Disc clutch friction thickness: Check disc clutch friction thickness which should be minimum of 2.6 mm.

Creep, Creep in belt drive

Creep in belt drive

Beams, a beam ABC is simply supported at A and C and caries a couple equal ...

a beam ABC is simply supported at A and C and caries a couple equal to 100kN applied clockwise at B

Evaluate the stresses in the concrete and steel bars, A load of 1.9 MN is a...

A load of 1.9 MN is applied on a short concrete column 300mm x 300mm. The column is reinforced with four steel bars of 10mm diameter, one in each corner. Evaluate the stresses in t

What is hybrid sweep, Hybrid Sweep It combines linear and/or non-linear...

Hybrid Sweep It combines linear and/or non-linear sweep via set operations. In this case, two point sets are swept in two different directions and the two resulting swept volum

How to observe water level, Q. How to observe water level? Site for ins...

Q. How to observe water level? Site for installing gauges should be properly selected. The reach should be reasonably straight and of uniform cross· section and slope. The leng

Annotation with leaders, Annotation with Leaders Ordinate dimensions ar...

Annotation with Leaders Ordinate dimensions are not really an dimensions at all in that they do not indicate a measurement.They annotate known as a co-ordinate points. The DIMO

Steps for decarbonise the engine , The following steps are taken to decarbo...

The following steps are taken to decarbonise the engine : Remove the exhaust muffler. Disconnect the spark plug. Remove the intake pipe bolt. Loosen the bolt de

Define term transfer of stress to footing, Define term transfer of stress t...

Define term transfer of stress to footing. Transfer of Stress to Footing:  The column transfers the load to the top of the footing by bearing. The magnitude of the pressure

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