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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
The Transformer oil helps cool the transformer. Because it also gives part of the electrical insulation among internal live parts, transformer oil must remain stable at high tempe
Refractoriness under load (RUL): This represents the resistance of a refractory material to the combined efforts of heat and load. RUL is the temperature at which the deformation
Objectives After doing this exercise you should be able to: 1. Describe the features of the preparation room of the lab you have visited, 2. Examine and evaluate a prepar
It is desired to concentrate a NaOH solution from 12.5 % to 40% in a double effect evaporator. 50,000 lb/hr of feed solution enters the evaporator at 120 o F, and steam at 15 psig
i need to make a small report on natural polymer
explain the identification of organic compounds basing on the structural theory
calculate the volume at (160c) and 221c if the quality is 0.85
Compute the kerosene/water ratio necessary to remove 90 % of the nicotine from the aqueous stream in a single equilibrium stage.
Explain covalent bond A covalent bond is a form of chemical bonding that is characterized by the sharing of pairs of electrons among atoms, or among atoms and other covalent
A Ge atom contains Ge atom contains Four valence electrons
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