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

Limit of proportionality, Limit of proportionality: Limit of proporti...

Limit of proportionality: Limit of proportionality is the stress at which the stress - strain diagram ceases to be a straight line that is, stress at which the extension ceas

Bolting procedures for equipment, Before installing a bolt, stud or nut, th...

Before installing a bolt, stud or nut, threads shall be examined to ensure that there are no incompletely cut threads in the engagement zone (both internal and external) or burns,

Short circuiting transfer, Short Circuiting Transfer The short circuiti...

Short Circuiting Transfer The short circuiting transfer  occurs when the welding current and the arc voltage is low. Metal is transferred from the electrode to the work only wh

Brinell hardness test, what is static indentation and dynamic indentation?

what is static indentation and dynamic indentation?

Balancing, what do you mean by static and dynamic unbalance in machinery

what do you mean by static and dynamic unbalance in machinery

Calculate the length of plastic deformation, Calculate the length of plasti...

Calculate the length of plastic deformation: Calculate the length of plastic deformation along 45o in case the applied stress is 63.25% of yield stress in the plate of abov

Determine the work transfer, If the expression is quasi-static, determine Q...

If the expression is quasi-static, determine Q, ΔU and W for the process. In another process the same system expands according to the similar pressure- volume relationship and f

Determine sliding velocity, a) A pair of 20 degree full depth involute spur...

a) A pair of 20 degree full depth involute spur gears having 30 and 50 teeth respectively of module 4mm are in mesh. The smaller gear rotates at 1000 rpm. Determine- 1) Contact

Project in Automobiles or Robotics, I am studying in Final Year of Engineer...

I am studying in Final Year of Engineering(Mechanical) and I would like some help for the project. It will be helpful if you suggest some project related to Automation.

Thermal, Prove that energy is a property of system

Prove that energy is a property of system

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