KILN PLASTER FOR CALCINING TEMPERATURES UP TO 300ºC
Direct fire continuous rotary kiln (patented) for production of Plaster / Plaster of Paris, or for production of Plaster / Plaster of Paris and Anhydrite II at the same time.
How it Works:
The calcining of the gypsum, is done inside the rotary kiln, HR1, HR2 or HR4 according to the required capacity. It is a continuous, and counter current, rotary kiln, and the gases are in contact with the product. It is designed to produce plaster for construction
(Plaster with a percentage of Anhydrite II) or plaster of Paris for prefabricated elements.
The flow through out the kiln of the hot gas that transfers the thermal energy for calcining the product is provided by a fan. The flow of the gas is opposite to the flow of the product (counter current).
In this type of kiln, specially designed to produce plaster and a controlled percentaje of Anhydrite II at the same time, the inlet chute introduces the gypsum inside the chamber formed by the outter tube and the inner tube, called the “Preheating Chamber”, where the temperature raises softly; then, after remaining in this chamber some time, the product is introduced inside the inner tube, called the “ Calcining Chamber”, where is carried out the calcining of the products at the setting temperature.
The calcining temperatures in this kiln, can reach up to 300ºC.
The patented technology of the MONTERDE kilns makes it possible to obtain both, Plaster/Plaster of Paris and Anhydrite II, at the same time, being the quality of the products very high at the minimum cost.
CALCINATION UP TO 300º
Because of the “patented” technology of our kilns, the efficiency of the system is very high, taking into account that the product output temperature is up to 300 degrees C and the range of temperature of the gases in the bag filter is from 90 to 110 degrees C, just for avoiding condensations inside the bag filter.
Although our kilns are specially designed for calcining calcium sulfate dihydrated “gypsum”, to obtain Plaster, Plaster of Paris and Anhydrite II; it is possible to calcine other products, within the range of temperaturas up to 300ºC, if the inlet product granulometry is suitable for the capacity required.
BASIC CHARACTERISTICS OF KILN MONTERDE PLASTER
- A rotatory kiln formed by two concentric tubes.
- Continuous operation.
- Direct contact between the hot gases and the material to be dehydrated.
- Countercurrent: the hot gases flow on the opposite direction to the material; this system implies great thermal energy savings.
- Possibility of producing 100% hemihydrate or 85% hemihydrate + 15% anhydrite II
THERMAL ENERGY CONSUMPTION
New patented low-temperature calcination system. It further reduces consumption (approx. 15%) and increases the stability of the material.
PRODUCTION AND DIMENSIONS
TYPES OF FUEL THAT CAN BE USED
The necessary thermal energy in order to carry out the gypsum dehydration in Monterde kiln can come from diverse sources of fuel energy:
- Fuel-Oil.
- Recovered Oils.
- Natural gas.
- Propane gas.
- Methane gas.
- Diverse biomass fuel.
GRANULOMETRY MONTERDE KILNS
