The calcining of the plaster, is done in a discontinuous rotary kiln, indirect fire type, with the required capacity. It is a rotary kiln where the gases of combustion are not in contact with the product. It is designed to produce Plaster for construction.

The heat generated in the combustion, is transferred to the product indirectly.

In this kiln for calcining Plaster, the gypsum is introduced by batches inside the tube of the kiln, which rotates inside of a “Combustion Chamber”. The burners flame heats the tube that contains the product, so the fire is not in contact with in the product.

The kiln has a heat recovery system, with a powerful fan that circulates the heat recovered through out the product, to take advantage of the calories as much as possible.

The calcining temperatures in this kiln, can reach up to 250ºC.

The technology of this type of MONTERDE kilns, allows to obtain a Plaster of the best quality, at the lowest cost.

Although our kilns are designed for calcining calcium sulfate dihydrated “gypsum”, to obtain Plaster; it is also possible to calcine other minerals, which can be calcined up to 250ºC, if they have the proper granulometry.