The most performing quality is the silicon carbide, a refractory product of a higher range , already produced in 1936 and in constant improvement since then. Mainly in 1988, a research and development contract was concluded with a laboratory of the Strasbourg university, with the aim of finding a performing and less costly bond.

The outcome was an alternative solution to the bond, particularly adapted to the requirements, that is :

• A high resistance to abrasion
• A good refractoriness to resist to high temperatures
• A perfect thermal conductibility required for the energy production
• A high density in order to resist to the attack and the coating of slag.
• A high resistance to corrosion and oxidation, the weak point of refractories used in the household refuse incineration, due to the presence of water or steam, which are the main enemies of refractory products.
• A good resistance to thermal shocks.

Haasser Refractories Silicon Carbide bricks, named HCS 90, do posses all the above characteristics, and even more so those required to resist to household and other urban refuse incineration.

The development of the new bond has allowed to obtain an excellent value for money, a great stability as well as an excellent grading distribution and special temperatures curve.

The shaping is obtained either through coating or through hydraulic pressing, hammering or vibrating. These processes are not usual and allow to obtain thin wall as well as an excellent thermal conductivity. The stability guaranties are usually of 16000 hours of continuous functioning.

Joint refractories and cement do also have their importance. Their chemical mineralogical composition is Silicon Carbide compatible and takes part in ensuring a high heat balance and the solidity of the bond.

The HCS 90 Silicon Carbide is also used in other areas like for instance the smelting works of special alloys. Thus, Haasser is the refractories supplier for the 7 billion Euro coins order that was granted to one of the biggest alloy smelting works in Germany.