Calculation Procedurefor temperature
In roastingore concentrate and coal are mixed to convert sulphide into oxide. Heat generated by roasting and combustion raises the temperature of the products of roasting and combustion. Thermodynamically it is possible to calculate the temperature under adiabatic condition,i.e. no heatis allowed to loss. This calculated temperature can then be adjusted by incorporating heat losses. We consider an adiabaticprocess of roasting:
Various heat input terms are:
- Heat of reaction
- Heat of combustion
- Sensible heat in reactants
This amount of heat input raises the temperature of products.
The products consists of solid products and gaseous
Here T is the adiabatic temperature. Thus for adiabatic roasting and combustion.
 for reactants +Heat of reaction and combustion 3
Where i is number of reactants and combustion products.
In equation 3 heat of reaction & combustion has to be added, since it is liberated.
If the material balance for roasting is known, as well as temperatures of fuel and air, heat content data and heat of reaction data can be used to setup an equation in which temperature of the products is unknown. Let me illustrate it with a problem.
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