June 29, 2023
Roller hearth kiln is a kind of roller tunnel furnace, also known as roller hearth furnace. Its operating principle is to put the materials in the sagger, crucible or on the setter, and place it on horizontal ceramic rollers with close intervals. The motor drives the helical gear or the chain to drive the rotation of the roller to transfer the product from the entrance of the kiln to the exit of the kiln body.
In the early days, roller hearth kilns were often used for sintering in traditional industries such as daily-use ceramics and bathroom porcelain. With the pursuit of production capacity in the new material industry and the continuous upgrading of roller bars and refractory materials, the roller hearth kiln has been continuously optimized and designed, and now it is more and more widely used in the new material industry.
At present, the conventional arrangement of roller hearth kilns is roughly 4 rows with 2 layers, 4 rows with single layers, 3 rows with 2 layers, 2 rows with 2 layers, 2 rows with single layers, etc. With the upgrading of roller bars and the improvement of masonry technology, some Japanese-funded and a few domestic kiln enterprises have the ability to produce 5-row and 6-row roller hearth kilns in the field of new material applications.
At present, the commonly used roller rod materials are alumina ceramics, silicon carbide and stainless steel. Due to the characteristics of its rollers, the operating temperature of the roller kiln is limited.
The optimization of the kiln structure and the improvement of the masonry process can also make the roller hearth kiln suitable for conditions such as oxidizing atmosphere and inert atmosphere, and can be applied to lithium battery anode and cathode electrode materials, ultra-pure alumina powder, high-purity zirconia powder, Materials such as magnetic materials, catalysts, rare earth oxides, powder metallurgy, and electronic components are sintered in an environment not exceeding 1320°C.
The roller hearth kiln is a main sintering kiln for the pursuit of large production capacity and good sintering environment in the field of new materials. The conventional consumables basically include the following types of sagger (crucible), heating elements (electric heating wire rod, silicon carbide rod), moving plate, rollers, heating element sleeves, etc.
Case Of Air Roller Hearth Kiln
Case of Atmosphere Roller Hearth Kiln
