The shape of slag pot depends primarily on the operational conditions it has to withstand. Thus, the following design criteria must be taken into consideration:
Type of furnace that the slag pot will service,
Quantity and type of slag generated,
Method of handling and dumping the pot,
Heat impact during operation,
Pot maintenance procedures
Necessary Parts for the handling of the pot.
at least 2 trunnions to pick it up and move it wherever this should be necessary,
the base to put it down onto the ground
a mechanism to handle the pot by a ladle carrier, that is, using this mechanism, the pot can be tipped to pour molten slag into slag pits for processing,
at least one tilting lug either to tip the filled pot by a crane or to turn the empty pot in an appropriate position for cooling down or for repair.
Slag pots with all parts necessary for its handling must be designed to meet the following essentials:
The thermal expansion due to heat load during operation should be uniform all over the circumference of the slag pot body and should be hindered as few as possible by material accumulations and ribs resulting in section areas of wall thickness transition.
Likewise an uniform contraction should be aimed at by a steered cooling after dumping.
Thus, there are rules of thumb in developing slag pot designs:
The bottom of the pot should not be in direct contact with the ground, but some ground clearance should be foreseen.
As few ribs as possible should be placed on the outside of the slag pot.
All these criteria aim at as good stability or stiffness as possible to prevent excessive premature deformation and secure the best life history of the slag pot.