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What are Refractory Bricks and mention it’s types?

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Asked: July 10, 20202020-07-10T13:48:36-07:00 2020-07-10T13:48:36-07:00In: Construction
Shivan
Shivan

Shivan

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What are refractory bricks and mention it’s types?

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  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    2020-09-08T23:23:55-07:00Added an answer on September 8, 2020 at 11:23 pm
    What are Refractory Bricks and mention it’s types?

    Refractory bricks (fire brick):

    Let’s discuss the definition of refractory bricks first.

    Definition :

    Refractory brick is a block of ceramic material specially used in kilns, lining, furnaces, fireboxes and fireplaces.


    A speciality of fire brick :

    • It can withstand very high temperature up to 1649 degree Celsius
    • It has low thermal conductivity for Greater Energy Efficiency

    Chemical composition of refractory brick :

    • Silica (SiO2) :  60-96 percent
    • Alumina (Al2O3) : 2- 36 percent
    • Magnesia,iron oxide, lime, alkalis : 2 to 5%

    The manufacturing process of fire brick :

    • Digging
    • Weathering
    • Tempering
    • Moulding
    • Burning

    Types of Refractory Bricks :

    A) Basic Refractory Bricks :

    1. Magnesite brick (85% magnesium oxide + 35 % iron oxide)
    2. Dolomite refractory brick ( it can resist at 1400 degree Celsius to 1600 degree celsius temperature)
    3. Bauxite refractory brick( 86 per cent bauxite)

    B) Acid Refractory Bricks :

    1. Ordinary fire brick
    2. Silica Bauxite (95% silica)
    3. Ganister brick (85% silica + 10% clay + 2% lime)

    C) Neutral Refractory Bricks :

    1. Chromium brick (50% Chrome iron ore)
    2. Carborundum (temperature of 21900 degree Celsius)
    3. Chrome magnesite brick
    4. Spinal brick (Alumina and magnesia has equal proportion)
    5. Forsterite Brick

     

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  2. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    2020-10-08T21:40:55-07:00Added an answer on October 8, 2020 at 9:40 pm

    A fire brick, firebrick, or refractory is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency.

    There are mainly three varieties of refractory bricks;

    a) Acid Refractories
    i. Ordinary Fire Bricks
    ii. Silica Bricks
    iii. Ganister Bricks

    b) Basic Refractories
    i. Magnesite Bricks
    ii. Dolomite Bricks
    iii. Bauxite Bricks

    c) Neutral Refractories
    i. Chromite Bricks
    ii. Carborundum
    iii. Chrome Magnesite Bricks
    iv. Spinal Bricks
    v. Forsterite Bricks

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  3. aviratdhodare

    aviratdhodare

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    aviratdhodare
    2020-10-08T17:36:29-07:00Added an answer on October 8, 2020 at 5:36 pm

    Fire clay bricks or Refractory bricks

    Fire bricks or fire clay bricks or refractory bricks are made from the fire clay. The process of manufacturing of these bricks is same as the ordinary bricks but are burnt at very high temperatures in a special type of kilns generally Hofmann’s kill. The raw materials of these bricks consists of flint clay and grog that has burned fire clay as non plastic materials and soft fire clay as plastic material.

    Properties

    • Color of these bricks is whitish-yellow or light brown.
    • Comp strength of fire clay bricks varies from 3.5 N/mm2 to 48.26 N/mm2.
    • The water absorption % of fire bricks varies from 4 – 10%.
    • These bricks are generally used in lining furnaces kilns, fire boxes and fireplaces.

    Principal types

    Acid Refractory bricks

    • Silica bricks: 95 – 97% silica, 1 – 2% lime
    • Ganister bricks: 98% ganister a hard colored stone with 10% clay, 2% lime.

    These are generally used in lining furnaces having siliceous & acidic slag steel industry and coke oven.

    Basic Refractory bricks.

    basic refractory bricks are manufactured from magnesia, dolomite, bauxite, etc.

    • Magnesia bricks: magnesium above 85%, calcium oxide up to 25% & silica up to 5.5%.
    • Bauxite bricks: aluminium oxide above 85% & clay up to 20 %.

    these type of bricks are highly resistant to corrosion and are used for lining furnaces having basic slag.

    Neutral Refractory Bricks

    • Chromite bricks: 50% chrome, 30% Iron oxide, 20% Bauxite.
    • Chrome magnesite bricks: A mixture of chrome ore and magnesite ore with a min % of Chromium (III) Oxide is >18% & Magnesium Oxide is >30%.
    • Spinel bricks: Made from the refractory slag produced in an electric furnace consisting of magnesia & alumina.
    • Forsterite bricks: Made from mineral forsterite

    The neutral refractory bricks are used in places where acidic and basic linings are to be separated.

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  4. Preet Chovatiya

    Preet Chovatiya

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    Preet Chovatiya Learner
    2020-07-13T21:08:51-07:00Added an answer on July 13, 2020 at 9:08 pm

    Refractory Bricks are ceramic material that normally used for high-temperature environments because of their decent insulator and flammability property.

    They are used for the construction of kilns, furnaces, and other high temperature subjected structures.

    Types of Refractory Bricks:-

    1. Chromite refractory brick
    2. Silica refractory brick
    3. Fire clay bricks
    4. High alumina refractory bricks
    5. Magnetite refractory brick
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  5. Madeh Izat Hamakareem

    Madeh Izat Hamakareem

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    Madeh Izat Hamakareem
    2020-07-11T16:38:42-07:00Added an answer on July 11, 2020 at 4:38 pm

    A fire brick is a special type of brick made using fire clay and has a good resistance against high temperatures which are used in kilns, lining furnaces, fireplaces, and fireboxes. These bricks are manufactured in a way similar to that of normal bricks, except during the burning process- Fire bricks are exposed to very high temperatures.

    To read more about properties, types, and uses of fire bricks, please visit the following link:
    https://theconstructor.org/building/fire-bricks-properties-types-uses/29377/

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  6. Vivek Patel

    Vivek Patel

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    Vivek Patel User
    2020-07-27T15:21:25-07:00Added an answer on July 27, 2020 at 3:21 pm

    Refractory brick is a brick that can stand against higher temperatures.

    Basically, refractory brick is used in kilns, havan kund, furnace, chimney.

    type of refractory brick

    • High alumina brick
    • Dolomite bricks
    • Fire clay brick
    • Magnetite brick

    For more information https://theconstructor.org/building/fire-bricks-properties-types-uses/29377/

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