KILN FOR CALCINATION TEMPERATURES STILL 800ºC
Direct fire continuous rotary kiln (patented) for production of Plaster / Plaster of Paris or Anhydrite II, but not at the same time.
Performance/It Works:
The calcining of the gypsum, is done inside the rotary kiln, HR3 or HR5 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 100% of plaster / plaster of Paris, or 100% of Anhydrite II because of the high temperatures for calcining the product, up to 800ºC.
For the heat generated in the combustion is received for the product for its dehydration, we have a powerful fan that facilites the circulation of heat air through the kiln in the reverse direction to the material: countercurrent.
In this type of kiln, specially designed to produce plaster/plaster of Paris or Anhydrite II, the inlet chute introduces the gypsum inside the chamber formed by the intermediate tube and the inner tube, called the “Preheating Chamber”, where the temperature raises softly. Then, after remaining in that chamber some time, the product is introduced inside the inner tube, called the “ Calcining Chamber”, where is carried out the calcining of the product at the setting temperature. Finally, after remaining the product some minutes in that chamber it is introduced inside another chamber, formed by the outter tube and the intermediate tube, called the “Cooling chamber”, where the material is cooled. As part of the termal energy of the product in the “cooling chamber” is transferred to the product inside the “Preheating chamber” the efficiency is so high. Because of this very special process, the range of temperature of the product at the outlet is from 90ºC to 300ºC.
The temperatures of calcination in this kiln, can reach to 800ºC.
The patented technology of MONTERDE kilns does that can be obtained a Plaster and Anhydrite, of the best quality at the lowest possible cost.
CALCINATION UP TO 800º
The energetic profit thanks to our technology, is so big in our kilns that for high calcination temperatures, the output temperature of the gases filter are between 90 and 110 grades, enough so that condensations do not happen.
Although our kilns are designed for the dehydration and calcination of calcium sulfate “raw plaster”, to obtain Plaster and Anhydrite II; Also it is possible to dehydrate or calcine any other mineral or product, that allows a temperature range from 0 to 800º, and a granulometry of suitable entry for the desired production.
MONTERDE KILN BASIC FEATURES
- A rotatory kiln formed by three 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 means a great thermal energy saving.
- Possibility of producing 100% hemihydrate or 100% 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 caloric energy in order to carry out the gypsum dehydration in Monterde kilns can come from diverse sources of fuel energy:
- Fuel-Oíl.
- Recovered Oils.
- Natural gas.
- Propano gas.
- Methane gas.
- Diverse biomass fuel.
GRANULOMETRY MONTERDE KILNS
