Question

portland cement is mainly is it manufactured following​

Answer 1

Answer:

Portland cement is essentially a calcium silicate cement, which is produced by firing to partial fusion, at a temperature of approximately 1500°C, a well-homogenized and finely ground mixture of limestone or chalk (calcium carbonate) and an appropriate quantity of clay or shale.

Explanation:

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Answer 2

Answer:

The dry process is the most typical approach to manufacture portland cement. The primary raw materials, namely limestone, clay, and other materials, are quarried as the initial phase. The rock is crushed after quarrying.

Explanation :

• The process of making portland cement involves four steps:

1. crushing and grinding the raw materials,
2. combining them in the right amounts,
3. burning the produced mixture in a kiln, and
4. grinding the burned product, known as "clinker," together with around 5% gypsum (to control the time of set of the cement).

• Furthermore, the raw materials are ground wet and fed to the kiln as a slurry, ground dry and fed as a dry powder, or ground dry and then moistened to actually form nodules that are henceforth fed to the kiln.
• These three manufacturing processes are known as the wet, dry, and semidry processes.
• Cement production is a significant source of carbon dioxide (CO2) emissions, contributing between 4 and 8 percent of the world's total emissions.
• Some of the remedies to these greenhouse gas emissions apply to other industries as well, like improving cement plant energy efficiency, switching from fossil fuels to renewable energy, and capturing and storing CO2 emissions.
• Additionally, new cements and alternative formulations that lessen the need for clinker are a key area of attention considering that a sizeable component of the emissions are an inherent element of the manufacture of clinker.

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