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Building Materials

August 12, 2017 18:08

Refractory products - a variety of applications and

Fireclay plates and other refractories - use

All refractory fireclay different mechanical strength and the ability to provide long-term resistance to various stresses at elevated heat resistance.One of the most remarkable properties of refractory materials is heat resistance, ie,resistance to repeated temperature changes at high speed under constant external parameters: volume, shape and size.

most famous of refractory fireclay bricks, without which today is unthinkable heating stoves and fireplaces, kitchen hearths, as well as special kiln porcelain, glass and metal smelting.They fireclay brick used in the furnace parts, i.e.in place of direct contact with the fire, which sometimes reaches temperatures up to 1650 degrees Celsius.

is produced by firing a mixture of fireclay bricks-fireclay powder (70%) and refractory clay.Often, instead of fireclay used quartz or graphite powder.It depends on where it is supposed to use brick, on the temperature and chemical characteristics of the object.

Refractory products - distinctive characteristics

Visually define refractory bricks belonging to the class is not difficult - it produces the grain structure and the yellow-sand color.Also available on the housing marking - the letter "W".Quality brick on impact is not scattered on the chips and split into fairly large pieces.

In addition, when tapped on it a metallic sound is heard clearly, while in poorly burnt brick he is deaf.Bad firing causes a very unpleasant phenomenon - Refractory products is perfectly absorbs moisture, causing the brick loses a significant portion of their original properties.

furnace, built of such bricks, at best, will not perform its function of heating and keeping warm, at worst - will simply collapse.

As noted above, the refractory bricks for protection from fire and heat, it is as if a kind of protective layer that protects the design of the furnace from the raging flames in the firebox.On this basis and formed the requirements to be met by fireclay bricks:

  • heat resistance, ie,property without any harm to withstand long-term heating to 1650 degrees Celsius;
  • low thermal conductivity, in other words, it must securely hold the heat inside the oven, preventing its loss;
  • increased heat resistance - the ability to withstand the maximum number of rapid heating and cooling cycles without loss of strength.

Fireclay refractories and other uses fireclay

leading position among refractory products occupy chamotte slabs are manufactured, heat accumulating elements of buildings stoves and fireplaces that are difficult, if not simply impossible to make bricks.This, for example, the elements can be straight-forms.

Unlike plate bricks can be easily cut to the desired size of the strips and lay them, for example, semi-circular surface facing.Another difference between the bricks is that the plate is essentially - a fibrous product chamotte, i.e.no heat shield, and heat accumulating elements, they accumulate heat during combustion and after its termination is given in the furnace environment.

can endlessly talk a long time about where to find the application of fireclay.For example, widely used in metallurgy fireclay crucibles designed to melt various metals and fireclay pipe is often used as a chimney, acid resistant and temperature extremes.