Calciner For Plaster of Paris, A part of the pyro-processing system at a cement plant is called as calciner. A special vessel, usually in line with the kiln, burns fuel to drive off carbon dioxide. SVI has developed Energy Efficient Calciners. Our innovation in the calcining technology reduces the Specific fuel consumption & electrical energy costs while meeting the stringent quality norms. Calcination is the process of heating a substance to a high temperature, but below its melting or fusing point, to bring about thermal decomposition or a phase transition in its physical or chemical constitution.

•  Cement

•  Lime

•  Refractoriness

•  Met kaolin

•  Titanium dioxide

•  Alumina

•  Vermiculite

•  Iron ore pellets

They are also used for roasting a wide variety of sulfide ores prior to metal extraction.

Principle Of Operation :

The kiln is a cylindrical vessel, inclined slightly to the horizontal, which is rotated slowly about its axis. The material to be processed is fed into the upper end of the cylinder. As the kiln rotates, material gradually moves down towards the lower end, and may undergo a certain amount of stirring and mixing. Hot gases pass along the kiln, sometimes in the same direction as the process material (co - current), but usually in the opposite direction (counter-current). The hot gases may be generated in an external furnace, or may be generated by a flame inside the kiln. Such a flame is projected from a burner-pipe (or "firing pipe") which acts like a large bunsen burner. The fuel for this may be gas, oil or pulverized coal.

Construction :

The basic components of a rotary kiln are the shell,the refractory lining, support tyres and rollers, drive gear and internal heat exchangers.