Because the product is placed on the horizontal ceramic roller which is closely spaced, and the product is transmitted from the inlet of the kiln to the outlet of the kiln body by the rotation of the roller, it is called the roller tunnel furnace.

Full name is roller tunnel furnace, also known as roller bottom kiln.

Its working principle is: put the product directly or indirectly on the roll bar, through the continuous rotation of the roll bar, the burnt products can move forward in order. The end of each roller is driven by chain through sprocket, and the chain is often divided into several groups for transmission in order to make the transmission more stable and safe. The roller at low temperature is made of heat-resistant nickel chromium alloy steel, and the roller at high temperature is made of high-temperature resistant alumina or silicon carbide ceramic rod. Use gas or electric heating element silicon carbon rod, silicon molybdenum rod and resistance wire as heating source.

It is mainly used in the production and application of ceramic tiles, powder materials and other industries. Roller hearth furnace is a continuous furnace, which has the advantages of low energy consumption, but it has higher requirements for the material and installation technology of roller.