SiC Refractories for Waste Incinerator

The working temperature of the waste incinerator for processing garbage is generally not more than 1200 ℃, but the gas (CI2, So2, CO, etc.) generated by the incineration of garbage will cause a severe chemical attack on the refractory materials. In a wider temperature range, SiC refractories materials have higher mechanical strength and wear resistance.

SiC Refractory Bricks

Refractories for Incinerators

Refractory materials for incinerators are roughly divided into refractory bricks and unshaped refractory materials (overall refractory materials). The former is mainly clay bricks, high alumina bricks, silicon carbide bricks. The latter is mainly composed of clay, high-alumina, silicon carbide castables and clay, high-alumina refractory plastics. With the large-scale technology and resources of waste incinerators, refractory materials of incinerators have also undergone tremendous changes.

The furnace temperature of the incinerator combustion chamber is as high as 1000~1300℃, the slag damages the sidewall refractory bricks very seriously, and accidents often occur. Considering the service life and corrosion resistance, it is advantageous to use SiC bricks.

SiC castables

SiC Refractories

Salts such as plastics and sodium chloride in the garbage have serious corrosion on the pipe wall. In order to protect the water pipe, dense SiC castables have been used. Its advantages are good durability in the middle and upper part and high construction efficiency. The disadvantage is that it is difficult to disassemble. The main use of its SiC refractories is that the slag is difficult to adhere to and has good corrosion resistance.

According to experiments, the use of SiC-based linings in incinerators can determine the SiC content and material according to the conditions of ① use temperature, ② FeO and other metal oxides, ③ H2O, CO2 and other oxidizing gases. In addition, the SiC-based lining is not suitable for use in the oxidizing atmosphere layer above the molten slag line. It is best to use it at the bottom of the furnace, preferably under a reducing atmosphere.

Protecting the Earth

Tips

The proper disposal of urban waste and industrial waste has become an urgent issue in contemporary urban management. Therefore, with the development of waste incinerators, the development of efficient and economical refractory materials for incinerators has become the key to popularizing waste incineration technology. Everyone is responsible for protecting the environment. 

In order to make our common home a better place, please protect the environment and start with waste sorting.