The Vertical Shaft kiln, or simply vertical kiln, is a common piece of machinery used in cement plants of all sizes to preheat and calcine clinker. This machine can fully automate the feeding, calcining, crushing, and discharging procedures.
The
Vertical Kiln was the first cement kiln developed and saw widespread use in
cement factories worldwide before the rotary kiln was designed. Even now,
vertical kilns are in high demand in many regions worldwide.
It
is standard practice for vertical kiln cement plants to first turn the ground
raw materials into wet pellets by adding 12-14% water to the pelletizing pan of
the disc pelletizer. After being calcined, the wet pellets are ejected from the
kiln's bottom.
The
interior of the Vertical kiln is segmented into three distinct
areas, labeled from highest to lowest by their respective temperatures during
operation: the preheating area, the calcining area, and the cooling area.
The Preheating Zone
When
wet pellets are introduced into a kiln, the hot air circulating from the bottom
to the top causes the water within the pellets to evaporate.
Meanwhile,
the volatile components are constantly escaping as the fuel temperature
increases. Since the heated air flow does not contain oxygen, the volatile
material is expelled into the atmosphere and exhaust gas.
The
material ball continues to sink deeper into the kiln supplied by Vertical shaft kiln Suppliers in India
as its temperature rises due to the force of gravity. Dehydration of the kaolin
occurs between 500 and 600 °C; further heating causes carbonate to dissolve,
triggering a portion of the solid-state process.
The
preheating zone's material height is 5-10% of the kiln body's total height, and
its temperature range is 20-1000°C.
The Calcining Zone
The
raw material's temperature remains over 1000 °C as it descends toward the
calcining zone.
Most
of the coal in the raw material begins to burn at this point, causing a rapid
rise in temperature and a multitude of solid-state reactions; the exothermic
solid-state reaction causes the temperature to soar to well above 1300 °C, at
which point the material appears liquid and enters the sintering phase.
Coal
quality, pellet size, air flow, raw material homogenization, discharge rate,
and skill level of operators all play a role in determining the vertical kiln's
calcining zone's height and location. The calcining zone is the lower portion
of the Rotary Kiln (about 10–15% of
the total kiln height) where the material is heated.
The Cooling Zone
The
calcined clinker transfers its heat to the cold air blasted upwards from the
bottom of the cooling zone. Air is heated while the clinker is being cooled and
then flows upward into the calcining zone, which aids in the combustion
process.
Conclusion
With
cutting-edge equipment, KINC Mineral Technologies produces only the finest
vertical kilns from the finest quality components. For our customers, we also
provide a service of personalization. In addition to being given within the
promised time range, this service is also offered at highly reasonable rates.
For vertical kilns, we are the go-to supplier. Shaft kilns employ a counterflow
system, with raw materials moving away from the hot gas. We are the best Vertical Shaft kiln Exporters in India.
