The normal construction brick has no fire resistance and strong heat. At influence of temperature higher than 800 wasps it begins to melt. Therefore for arrangement of furnaces and fireplaces it is recommended to use special refractory brick.
Features of refractory brick
The heat resisting brick is capable to maintain temperatures to 1500 wasps. This material has high heat conductivity. It keeps and gives warmly much better than normal ceramic red brick.
Outstanding properties of heat-resistant brick are explained by its structure. That this material did not burst when roasting, add 50-70% of chamotte (the fire-resistant burned clay) to it. Also for additional refractoriness sometimes include quartz grains, graphite or coke powder in structure. The Shamotny brick is made, burning at high temperatures mix from powder of chamotte and the ground refractory clay.
The Shamotny brick can be distinguished on exterior. It possesses granular structure of sand-yellow color. The weight of shamotny brick at the identical sizes is about 15-20% heavier, than at construction brick.
Use of refractory brick
The refractory brick is applied in laying of fireplaces, heating furnaces, fuel chambers, the kitchen centers and smoke pipes. Distinguish four types of this material: quartz, aluminous, main and carbonaceous brick. All of them find various application in construction.
The refractory brick also finds broad application in the industry for construction of the high-temperature furnaces used by production of glass and ceramics.
The quartz brick is used where internal walls of furnaces adjoin to fire. This material does not transfer contact with lime, alkalis and oxides of iron. As a rule, do the arches of fireplaces of it. The quartz brick, unlike normal, is uniform, in it there are no cavities. It is made of the quartz cemented by clay or of clean sandstone. Aluminous bricks as it is clear from the name, consist mainly of clay. They it is better than quartz bricks maintain rapid changes in temperature and alkali influence. This fire-resistant material is quite plain in production and finds the broadest application in construction of household furnaces, fireplaces and arrangement of flues. The name of grade "the main brick" comes from the chemical term "bases". This material is made of limy and magnesian fire-resistant weight. It is used in metallurgists when smelting acid steel from phosphorous ore. The carbonaceous brick represents the pressed coke or graphite. It is used in blast furnaces.