With the continuous improvement of people's quality of life, firewood floor cookers are not only used by farmers, but also used in commercial hotels and some delicious restaurants. However, the frequency of use will increase. The original firewood pot can't stand high temperature and high frequency, and it will soon burst, causing dangerous situations such as smoking and fire.

Therefore, changing the hearth of the firewood pot into a lining or core brick lined with refractory materials can not only continue to be used at high temperature, but also be designed into a special-shaped brick sample as needed, so that the hearth is not only sealed and insulated, but also resistant to oil smoke and fire. The following are two kinds of refractories used in the hearth of Chai Hotpot.

The first kind of inorganic hydraulic refractory mud is also commonly used as wood stove repair material. It can be mixed with water in a certain proportion to make slurry, and then rubbed on the stove surface by hand, which is not only heat preservation but also high temperature resistance.

The second type is customized according to the hearth size of the wood stove. Tile refractory bricks, combined refractory bricks or integral refractory bricks are bonded with refractory mud and built in the furnace, which also has high temperature and fire resistance and is not easy to be damaged.