| 초록 |
Supercritical fluids extraction has many advantages of waste production, rapid extraction, enhanced extraction efficiency for waste removal. Steel manufacturing process are iron making, steel makng, continous casting, and rolling process. Particularly, because grinding swarf produced from the rolling process has cutting oil over 10% of total weight, it is classified as a specified waste. If successful procedure can be implemented to separate and recycle the steel and cutting oil from raw swarf, it will be turned into high-grade steel that can be applied to various fields of metal material. In this work, we used super-and subcritical propane as a solvent in order to remove cutting oil from swarf. This experiments were performed in the temperature ranges from 80 to 110°C and pressure ranges from 5 to 20MPa. In addition, the characteristics of swarf particles treated with super- and subcritical fluids were compared with those treated with vaccum thermal extraction. By using super-and subcritical propane as a solvent, we could not only remove cutting oil from swarf, but also preserve the fiber's own characteristics of swarf effectively. |
