| 摘要 |
PROBLEM TO BE SOLVED: To provide a treatment method of spent refractory by which the quantity of the spent refractory to become waste is minimized by removing incorporated metals, sorting crushed particles of the spent refractory containing an infiltrated part and separating and recovering a large quantity of particles of a good quality part of the spent refractory with high precision. SOLUTION: A primary magnetic selection is carried out on the spent refractory to remove the metals and after that, the spent refractory is crushed, screened and further is secondarily magnetically selected with a larger magnetic force than that of the primary magnet selection to separate into a magnetic body and a non-magnetic body and if necessary, it is distinguished by color whether the slug infiltrated layer is existed or not in the spent refractory of the selected nonmagnetic body to separate into one having the infiltrated layer and one having no infiltrated layer. |
