How to choose the right brick for masonry stoves

For the construction of heating stoves in individual houses widely used ceramic bricks. The construction industry produces a wide range of brick masonry stove, but what to choose from the proposed items? Before we consider this question, you need to understand the fact that for masonry stoves use two types of bricks is a simple ceramic brick, but with certain characteristics that is used for masonry elements, furnaces, chimneys and refractory or fireclay brick used for masonry hearth furnace.

  What properties should have the bricks used for masonry furnace

Brick kiln needs to meet the following technical requirements:

  • Resistance to high temperatures and exposed to open flame.
  • The ability to store heat and keep it for a long time.
  • Sufficient mechanical strength.
  • Resistance to significant temperature fluctuations.
Solid fuel furnaces built of ceramic brick that meets the requirements of GOST 390-96. This standard entered into force on 1 July 1997 and establishes the technical conditions that must be met for these products in shape and size. Regulatory document defines requirements for the use of products depending on temperature.

Ceramic bricks intended for the construction of thermal units, the requirements are more stringent than for other building materials. In the furnace of the furnaces, the flame temperature may exceed 1000 °C, consequently its walls are subjected to considerable thermal stress. Thermophysical parameters of the material used should be above the specified value.

In the operation of fired heaters is their regular cooling in some cases to negative temperatures. Brick when it is exposed to significant temperature changes in the external environment, which leads to thermal expansion, with subsequent compression. The product must have enough strength to successfully withstand this phenomenon and to avoid the deformation and destruction.

Bricks used for masonry stoves must have a sufficiently high conductivity and the ability to store heat. The first property is required for rapid heating of premises and transfer of energy unburned fuel into the environment. The second quality allows to support the process after the termination of combustion in the furnace for a long time. This allows long enough to maintain a comfortable thermal conditions.

The use of different types of brick masonry elements of different furnaces, Solid fuel furnaces have a fairly complex design, parts which operate in certain conditions. The question arises, what is the need for brick masonry stoves and its elements?

The device of the heating furnace are the following:

1. The firebox and ash pit.

The combustion chamber preferably has a double-layered wall, the inner runs of fire-resistant (refractory) bricks, exterior – facing ceramic bricks. The furnace erected from refractory brick with a maximum fire-retardant properties. Exterior finish furnace working in less stressful conditions and it is possible to use facing bricks, with excellent decorative characteristics.

2. Flues.

Flues are a large heat exchanger and the temperature in them, though lower than in the furnace, but still quite high. For laying of these elements oven used refractory brick. Outside design can be covered with ceramic tiles or facing bricks.

3. Chimney.

The chimney is in direct contact with the atmosphere and experiencing large temperature changes. Therefore, it is used for ceramic bricks with maximum hardiness. Typically, this item also has a two-layer structure with a decorative outer finish of a ceramic brick or a metal box.


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