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Thermal spelling: The breaking or cracking or peeling off the refractory is known as spelling. A good refractory must show a good resistance to thermal spelling. Thermal spelling can be decreased by minimizing the development of internal stress by:
(1) Using refractory with high porosity, good thermal conductivity and low coefficient of expansion.
(2) Avoiding sudden temperature changes.
(3) Proper furnace design
how to
Advantages of cold working (i) No heat is needed. (ii) Better surface finish is get. (iii) Superior dimension control. (iv) Improved strength and hardness properti
Laboratory staff and students Give an account of the permanent staff and students using the lab and for what purposes. Here you may use the concept of Laboratory Investigation
calculate the volume at (160c) and 221c if the quality is 0.85
Give the properties and applications of Teflon. Teflon: This is acquired by the polymerisation of tetrafloourethylene. Properties: 1. This has good electrical, therma
In the dryer air furnace, a natural gas containing 92.5 mole% methane, 4.8% ethane, and the remainder propane is burned with 20% excess air. The fuel enters the furnace at 25°C and
scanning electron microscope
How can I prepare Glutraldhyde?
how can be boiler trouble be minimised ?
An electron in the conduction band Has a higher energy than an electron in the valence band
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