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    Production Process of Cement

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    Marwa
    1. Portland cement is produced through a chemical process involving calcium, silicon, aluminum and iron. 2. In the dry process, raw materials like limestone and clay are crushed, homogenized, and dried in a preheater before being calcined in a rotary kiln at high temperatures to produce clinker. The clinker is then ground to produce cement. 3. In the wet process, limestone and clay are ground with water to form a slurry, which is dried and burned in a kiln at 1500 degrees Celsius to produce clinker. The clinker is then ground with gypsum to produce cement.

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    Production Process of Cement

    Uploaded by

    Marwa
    191 views2 pages
    1. Portland cement is produced through a chemical process involving calcium, silicon, aluminum and iron. 2. In the dry process, raw materials like limestone and clay are crushed, homogenized, and dried in a preheater before being calcined in a rotary kiln at high temperatures to produce clinker. The clinker is then ground to produce cement. 3. In the wet process, limestone and clay are ground with water to form a slurry, which is dried and burned in a kiln at 1500 degrees Celsius to produce clinker. The clinker is then ground with gypsum to produce cement.

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    cement process

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    Cement Process

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    1. Portland cement is produced through a chemical process involving calcium, silicon, aluminum and iron. 2. In the dry process, raw materials like limestone and clay are crushed, homogenized, and dried in a preheater before being calcined in a rotary kiln at high temperatures to produce clinker. The clinker is then ground to produce cement. 3. In the wet process, limestone and clay are ground with water to form a slurry, which is dried and burned in a kiln at 1500 degrees Celsius to produce clinker. The clinker is then ground with gypsum to produce cement.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    191 views2 pages

    Production Process of Cement

    Uploaded by

    Marwa
    1. Portland cement is produced through a chemical process involving calcium, silicon, aluminum and iron. 2. In the dry process, raw materials like limestone and clay are crushed, homogenized, and dried in a preheater before being calcined in a rotary kiln at high temperatures to produce clinker. The clinker is then ground to produce cement. 3. In the wet process, limestone and clay are ground with water to form a slurry, which is dried and burned in a kiln at 1500 degrees Celsius to produce clinker. The clinker is then ground with gypsum to produce cement.

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    Production process of cement

    Introduction:
    Portland cement is the basic ingredient of concrete. Concrete is formed when port-land cement
    creates a paste with water that binds with sand and rock to harden.
    Cement is manufactured through a closely controlled chemical combination of calcium, silicon,
    aluminum, iron and other ingredients.
    The most common way to manufacture Portland cement is through a dry method. new type dry
    process cement plant is given below
    Dry cement process:
    1. Crushing and Pre-homogenizing
    Most of the raw materials, like limestone, clay, iron ores, and coal, should be crushed
    before their pre-homogenization. Limestone is the primary material in this line, and due to
    its large particle size and high hardness, it’s good crushing plays an important role in the
    whole line. Special stacking and reclaiming technology has been used in the pre-
    homogenizing process so that raw materials can be better primarily homogenized.
    2. Raw Meal Preparing
    Since the raw meal grinding work takes up more than 30% labor force in the whole dry
    process cement production line, it is quite important to choose appropriate grinding
    equipment and technological process so that high-quality products can be obtained.
    3. Raw Meal Homogenizing
    The raw meal homogenization is a key factor for stable clinker calcination.
    4. Preheating and Decomposing
    The preheater is used to preheat as well as decompose raw meal. So the length of the rotary
    kiln is effectively shortened. And the raw meal can fully exchange heat with the hot gases
    from the kiln. Because of its rapid and high-efficiency heat transfer, the production
    efficiency and heat consumption of this production line are greatly improved.
    5. Clinker calcining
    After its preheating and pre-decomposing, the raw meal will be calcined in the rotary kiln,
    where the generated carbonate will be further decomposed. Meanwhile, a series of solid
    phase reactions will take place.
    6. Cement grinding
    As the last process, the cement grinding will consume a great deal of electricity. And in
    this process, special size granule cement will be obtained.
    7. Cement Packaging
    The cement can be transported in bulk or in bags.
    Wet cement process:
    The manufacture of cement is a very carefully regulated process comprising the following
    stages:
    1. Quarrying- a mixture of limestone and clay.
    2. Grinding - the limestone and clay with water to form slurry.
    3. Burning - the slurry to a very high temperature in a kiln, to produce clinker.
    4. Grinding - the clinker with about 5% gypsum to make cement.
    Raw materials extraction:
    The limestone and clay occur together in our quarries at Cape Foul wind. It is necessary to
    drill and blast these materials before they are loaded in 70t capacity trucks.
    The quarry trucks deliver the raw materials to the crusher where the rock is crushed to smaller
    than 100mm (4 inches). The raw materials are then stored ready for use.
    Raw materials preparation:
    About 80% limestone and 20% clay are ground in ball mills with water, producing very fine,
    thin, paste called slurry. The chemical composition of the slurry is very carefully controlled by
    adjusting the relative amount of limestone and clay being used.
    The slurry is stored in large basins ready for use.
    Clinker burning:
    The slurry is fed into the upper end of a rotary kiln, while at the lower end of the kiln, a very
    intense flame is maintained by blowing in finely ground coal.
    The slurry slowly moves down the kiln and is dried and heated until it reaches a temperature
    of almost 1500 degrees Celsius producing "clinker". This temperature completely changes
    the limestone and clay to produce new minerals which have the property of reacting with water to
    form a cementations binder. The hot clinker is used to preheat the air for burning the coal, and the
    cooled clinker is stored ready for use.
    Cement milling:
    The clinker is finely ground with about 5% gypsum in another ball mill, producing cement.
    (The gypsum regulates the early setting characteristic of cement). The finished cement is stored in
    silos then carted to our wharf or packing plant facilities.

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