How to Judge the Quality of Silicon Carbide Bricks

Silicon carbide brick is a refractory material with SiC as the main raw material. Contains 72% to 99% SiC. Divided into clay bonding, Si3N4 bonding, Sialon bonding, β-silicon carbide bricks such as SiC bonding, Si2ON2 bonding, recrystallization, etc. Silicon carbide bricks have high thermal conductivity, good wear resistance, good thermal shock resistance, and corrosion resistance. It can be used for the lining of aluminum electrolytic cells, molten aluminum conduits, ceramic kilns, the lower part of large and medium-sized blast furnaces, furnace waist and bosh, the lining of aluminum refining furnaces, lining of zinc distillation tanks, etc.

When purchasing silicon carbide bricks, many users cannot distinguish the quality of silicon carbide bricks and silicon carbide products due to lack of experience, so they often purchase substandard silicon carbide products, which greatly affects the service life of the kiln and increases the cost of the furnace. The investment in refractory materials has brought unnecessary losses to the enterprise. So how to distinguish the advantages and disadvantages of silicon carbide bricks?

First of all, the size and specification of silicon carbide bricks should be accurate. The ratio of silicon carbide bricks is generally between 2.45 and 2.6. If the ratio is too small or too large, the material itself is impure. Other refractory materials must be added, which will greatly affect the silicon carbide content and heat transfer performance. When purchasing silicon carbide bricks, it is necessary to check whether there are missing corners and cracks on the surface of the bricks. Chipped corners and cracks should be accepted within the scope of national standards. If it seriously exceeds the national standard, the quality of this batch of products is unqualified.