What is the temperature required to make cement?
about 1300-1450 °C
Also known as the firing zone, the burning zone is at the lower end of the rotary kiln, where the cement components are heated to about 1300-1450 °C (2372- 2642 °F), forming clinker.
What is the range of back end temperature in rotary kiln?
1.1 Back End Temperature (BET) It ranges from ~800 °C in wet kilns (before the chain section) up to ~1200 °C in AS precalciner kilns.
What are the reaction temperatures during clinker burning?
The clinker burning process is a high-temperature process resulting in the formation of nitrogen oxides (NOx). The amount formed is directly related to the main flame temperature (typically 1850–2000 °C).
What is a Precalciner?
A precalciner is a shaft heat exchanger used for the preheating and partial calcining of material before it is burned in a rotary kiln.
What are the advantages of using Precalciner explain briefly in few sentences?
Advantages of Appling Precalciner It is beneficial to reduce the heat load of rotary kiln, reduce the size of kiln, greatly improve the production efficiency, and save construction investment. It is conducive to the realization of large-scale cement production, reduces air pollution.
Is it possible to grow cement using bacteria?
Washington: Scientists have used bacteria to create a sustainable concrete that is alive, and can even reproduce, an advance that may help reduce the environmental impact of the construction industry.
What fuel is used in cement?
coal
Since coal is the most widely used fuel for cement production, coal will be the focus of the fuel preparation step.
What is liquid phase in clinker?
Liquid content of clinker is the fraction of the kiln feed that melts between the upper transition and burning zone. The liquid content has a critical role in clinker nodulization and clinker phase development and properties.
What is C2S in clinker?
Belite (C2S): another most common and well-known component of clinker is the belite β-C2S (monoclinic). In industrial cement production belite is formed in the rotary kiln at 900–1250°C [45]. The basis of belite formation is the reaction between solid CaO and SiO2 particles.
What is the advantage of using Precalciner?
8. What is the advantage of using precalciner? Explanation: Almost 95% of calcination is completely over in the precalciner, if 50-60% of fuel is added to this chamber. Hence fuel in the kiln required is less.
Why Precalciner is used for the process of calcination?
The reason why a precalciner is arranged in the cement production line is that the precalciner can uniformly distribute the raw materials so that the raw materials do not form an accumulation phenomenon.
Is brick stronger than concrete?
Brick strength– Comparably clay bricks have a compressive strength two and a half to three times stronger to three times higher than concrete bricks. Meaning clay bricks can withstand eight to twelve thousand pounds while concrete generally can only face three to four thousand pounds.