What if the ultra-light clay freezes?

Ultralight clay has a solution: if the clay is frozen, it may be cold. Try it in a fire place for two days, and you can usually recover. Clay is an important mineral raw material. It can be divided into ceramic clay, refractory clay, brick clay and cement clay according to their properties and uses. Hard clay is often in block or plate shape, generally insoluble in water, and has high fire resistance. It is the main raw material of refractory products. Hard clay in refractory clay is used to make refractory materials for blast furnaces, lining bricks and plug bricks for iron smelting furnaces, hot stoves and steel drums.