Refractory material Remarkable Characteristics for Hazardous Waste Rotary Kiln
Therefore, SIJIHUO REFRACTORY makes a conclusion for refractory materials’ characteristics for rotary kilns for hazardous waste incineration:
Being able to operate in a high-temperature environment above 800 ℃ for a long time.
High strength and good abrasion resistance.
The refractory material for the rotary kiln lining needs to have a certain mechanical strength to withstand the expansion stress at high temperatures and the stress caused by the deformation of the rotary kiln shell.
At the same time, because the hazardous waste and the dust in the flue gas will cause wear on the kiln lining, it is required to have strong abrasion resistance.
Good chemical stability to resist the erosion of chemicals in the flue gas.
Alkali (potassium, sodium), halogen (chlorine, fluorine) and sulfur compounds, etc. have the greatest influence on the quality of refractories.
Good thermal shock resistance, being able to withstand alternating thermal stress in the incinerated state.
In the case of furnace shutdown, furnace start, and operating under unstable rotation, the temperature change in the kiln is relatively large, which requires that the refractory material must not crack or flake under the condition of drastic temperature change.
High-temperature volume stability is good.
Although the thermal expansion coefficient of the rotary kiln shell (generally carbon steel plate) is greater than the thermal expansion coefficient of the rotary kiln refractory, the shell temperature is generally around 150 to 300 ℃, and the temperature of the refractory material is generally above 800 ℃
It may cause the refractory material to thermally expand more than the rotary kiln shell and easily peel off.
If the porosity is high, the smoke will penetrate into the refractory and corrode the refractory linings.
At present, in domestic and foreign hazardous waste incinerators, rotary kilns are usually built with refractory bricks, and refractory castables are only used at both ends of the kiln.
The commonly used refractory bricks mainly include mullite bricks, high alumina bricks, etc. The castables are mainly high alumina refractory castables, corundum mullite castables, and the castables shall be blended and vibrated with stainless steel fibers to reinforce the abrasion resistance and mechanical strength.
- Mullite Brick
- High Alumina Brick
- Corundum Brick
- Andalusite Bonded Brick
- High Alumina Refractory Castable
- Corundum Mullite Castable
- Abrasion Resistant Castable
After the kiln-lined refractory bricks are built in the rotary kiln for hazardous waste treatment, an oven process is required. The purpose is to remove the water in the refractory masonry, so that it can exert the high-temperature performance of the material and the strength of the masonry.
Please contact us for the specific scheme of its oven.
If you need a refractory material recommendation for Hazardous Waste Rotary Kiln, please send us your RFQ by email or leave us a message, we will revert back in 24hours.