furnace brick

For the construction of furnaces and fireplaces pick up a special kind of masonry material - furnace brick.He has a set of characteristics that make it suitable for everything furnaces, chimneys and the shell itself stoves and fireplaces.The basic qualities of such material do not allow to use it for other purposes.

Species

commercially available brick furnace has several varieties:

• fireclay (shape is rectangular, wedge-shaped, trapezium-shaped);
• zabutovochny (another name - the ordinary);
• facing.

Each species has its purpose.Fireclay refractory bricks are vykladyvanii furnaces, the use of ordinary brick kiln is limited to the construction of the chimney or the enclosure.Facing, if it is needed, it is the external finish of fireplaces or stoves.All kinds of furnace bricks have a high resistance to high temperatures.

material properties

The composition of raw materials going to the production of furnace bricks include refractory clay.Refractory bricks can withstand temperatures up to 1000 ° C and above, just to 1800 ° C, they are able to contact with chemicals.In some types of kiln bricks add quartz powder, graphite or coke.

Dimensions and weight

generally accepted the following dimensions and weight of furnace solid bricks.

Zabutovochny (ordinary):

• Single (250 × 120 × 65 mm, 3.3-3.6 kg);
• Bastard (250 × 120 × 88 mm; 4-4.3 kg);
• Double (250 × 120 × 138 mm; 6,6-7,2 kg).

Fireclay, the most common types:

• SB-5 (230h65h114 mm; 3.4 kg);
• SB-8 (250h65h124 mm; 4.0 kg).

Benefits

addition to fire resistance, a brick kiln has a good capacity for a long time to give the accumulated heat, while not endangering the surroundings excessive heat without causing a fire hazard.It perfectly fulfills its main task - to disperse and accumulate heat.At a laying of the furnace body or fireplace need products with the brand strength of the M-175 and more.Otherwise, the oven does not last a long time.If all the recommendations of the oven will stay intact for years to come, because the material will not rot, it will not be destroyed by mold and insects.

Another advantage of the brick kiln is the ability to withstand large temperature changes.Furnaces of such a material can be installed without heating rooms, and even on the streets.

Disadvantages

Among the shortcomings can be noted a rather high cost.However, in the construction of furnaces can not save, ceramic brick is not suitable for the oven, it will collapse very quickly, because the maximum temperature that it is able to withstand without problems - 800 ° C.

Specifications furnace brick

Fireclay brick, from which laid out the furnace, has the following specifications:

• density - 1700-1900 kg / m³;
• fire resistance - not less than 1,650 ° C;
• strength - 12-23 N / mm²;
• thermal conductivity - 0.62 W / (m · ° C);
• porosity - 8%;
• Brand frost - F15-50;
• brand strength - M75-250;
• water absorption - 25%.

External contrast firebrick from other species is clearly seen in the photo and video: color it yellow.

Feedback from consumers, low humidity prevents the use of the material for other purposes.If you build a house, it will be damp and uncomfortable in it out of it.Therefore the best scope - the construction of furnaces and fireplaces.

Tips for Choosing a brick kiln

Deciding to buy a batch of masonry material, you need to understand how to have to look externally these products.Even one manufacturer may be released in the sale of a completely different quality of product.Therefore, when buying it is necessary to focus on the following indicators:

• select the part with heavier products because a lot of weight indicates a high density;
• neat regular shape with a minimum error;
• quality brick when tapped on it gives a sound similar to metal;
• at splitting visible internal structure of the material: it should be a smooth color without spots.

Check the quality of the products can be directly on the stock trading company.In the store, such manipulations are not worth spending.

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