TEIDE REFRACTORY SOLUTIONS, S.L.: MOMENT OF INERTIA APPLIED IN REFRACTORY LLINING OF WAGONS.

Moment of inertia (I) is known as the measurement of rotational inertia of a body.It means, the force which must be exercised over a body to get to rotate.

In red ceramics sector, it is very important when designing the lining of a kiln car, specially the basis of parts that make up its perimeter. This shall determine the ability to withstand forces that exert external to the own covering elements such as ash, salts, powder,…

A serious problem in the Red ceramics sector are the accidents of obstruction caused inside the kiln since the external elements that are deposited on the trolley, get rotate the perimeter supports making these to block up against the walls of the kiln.

Effect of the force exerted by external elements of the wagon’s perimeter.

When calculating the force (F) from which the parts would begin to tip over, we will take into account basically 3 items, the weight (W), height (H) and the base (B) of the piece by means of the following formula:

F > P.B 2H Force (F) is directly proportional to the base (B) and the weight (W) and inversely proportional to twice the height (H).

Below these lines we show a table showing the relationship of the force (F) and the weight of the workpiece according to height (H) and the Base (B) of the block:

The best relation, (and the one TEIDE REFRACTORY SOLUTIONS, S.L. suggests), between force (F) and the weigt of the piece (W) is up to 0.70, that would be the green area of the table, in order to ensure NO overturning of the piece. Staying in the yellow zone, around 0.6, it would be advisable as a limit. We must avoid that relationship strength – weight that is in the red zone, less than 0.6.

If the plate that fits over the bottom bracket extends towards the inside of the lining, we can move the center of gravity towards the interior, with the consequent increase of the moment of inertia of the part.

NOT OVERTURNING THE CONTOUR PREVENTS THE PERIMETER OF THE WAGON TO BECOME CLOGGED WITH THE WALLS OF THE OVEN, IS ESSENTIAL FOR NOT HAVING UNPLANNED SHUTDOWNS IN THE PRODUCTION.