Why Are Centrifugal Fans Necessary In The Manufacturing Of Cement?
                     Why Are Centrifugal Fans Necessary In 
The Manufacturing Of Cement?
Neel Rao
Writes on 
Reitz India manufacturer of PA and SA fans & Reitz 
India industrial fan manufacturers in India.
Centrifugal industrial process fans play major roles in a variety of industries and 
industrial processes. The cement industry is a big user of the industrial centrifugal 
fans for mechanizing the industrial processes. This industry primarily implements 
heavy-duty fans dedicated to one of the two purposes: supplying air or removing 
exhaust gases and handling materials.
Storage And Grinding Of Coal
Industrial centrifugal fans are used in the process of grinding coal to a fine powder 
and then storing the powder. A wagon is used to transport the coal hopper, from 
where it is conveyed to the mill hopper using conveyor belts where the fans are 
needed. After the coal is grounded into fine coal powder, a circulating air fan collects 
it and delivers it to a bag filter. Again, fans are necessary to vent out the dust-free air 
after the extraction of coal dust.
Grinding Mills
Raw mills come in 2 types: ball mills and vertical roller mills. After the raw materials 
necessary for producing cement are fed in through the mill inlet, they undergo 
several processes such as drying, grinding, and separation. In the case of a vertical 
roller mill (VRM), all these processes are integrated into 1 unit. An exhaust fan 
maintains the flow of materials and the hot gas inside this mill. A suction vent fan is 
then used to collect the dust particles while the exhaust fan feeds its outlet gas into 
an ESP.
Kilns
Pulverized coal is pumped to the kiln via a feed pipe. A fan known as a preheater fan 
plays a role in the kilns, after the burning zone of the kiln produces a hot gas, the 
preheater fan sends out this gas. After the heating process, the preheater material is 
discharged to the inlet of the kiln.
Coolers
The hot cement clinker in the kiln needs to be cooled and solidified. The cooling fans 
play a role here, by blowing atmospheric air in through the holes in the cooler plates 
to cool the hot clinker. A part of this air is then diverted to the preheater fan to be 
used as secondary air for burning coal inside the kiln. Some of the air is used to dry 
coal inside the coal mill. The remaining air is extracted by an induced draught fan to 
outside via pollution control equipment.
Cement Crushers
Clinker and gypsum are the prime materials needed to manufacture Ordinary 
Portland Cement, abbreviated as OPC. Belt conveyors and electronic weigh feeders 
pour the materials in necessary quantities and ratio into the mill. Grinding media 
balls are then used to grind these materials inside the cement mill. The friction of 
the clinker and the grinding media balls create heat inside the mill due to friction.
The coarse materials and fine materials are then separated and this is where a 
recirculating fan is used. After this, pneumatic pumps, belt bucket elevators, and air 
slides convey the fine powder to the cement silos. The coarse materials are sent 
back into the cement mill inlet where it is ground again. The bag filters and ESPs 
inside the mill come with fans that suck out the gas. This gas then undergoes a de-
dusting process, after which it is released back into the atmosphere.
Conclusion
Centrifugal fans play key roles in the process of manufacturing cement and several 
types of fans are used. Each type of centrifugal industrial process fan has its purpose 
and very specific role in the cement manufacturing process.
About REITZINDIA
Reitz India has set a benchmark to deliver high quality fans for heavy duty industries 
which can work at precise operating conditions like high temperatures and pressures. 
Reitz offer idealistic Centrifugal Fan and Centrifugal blower design that can be used in 
all large scale process industries like cement, iron & steel, power plants, fertilizers/ 
chemicals and more.
Thank you for spending your precious time in reading this article!