Characteristics of ceramic support made by spent foundry sand-loess mixtures are investigated by bulk density, porosity, durability, and compressive strength. And the basic properties of SFS and loess are estimated. The effect of drying time after cutting process, elevated temperature time, sintering temperature, and sintering time is also estimated to obtain the optimal condition in the process of manufacture ceramic supports. From the basic properties of SFS and loess, the content of $SiO_2$ in furan sand is much higher than that in loess but the content of $Al_2O_3$ and $Fe_2O_3$ in furan sand is much lower than that in loess. In order to make ceramic supports, cylinder shape is the most desirable to sustain the properties of ceramic support. If annulus shape has an enough compressive strength, however, annulus shape may be decided. For the optimal condition to manufacture ceramic supports, drying time after cutting process is decided to 24 hrs and elevated temperature time is decided by 9hrs. And sintering temperature and sintering time are decided to $900^{circ}C$ and 9hrs, respectively in order to prevent solidification of sand materials.