| abstract |
The invention relates to a method for treating a solidified solid (1), comprising at least one treatment step, called hot acid treatment (4), of the asbestos (3) of the solid-state solid (1) at atmospheric pressure. by an aqueous solution (5) of hydrochloric acid at a temperature close to the boiling point of the aqueous solution (5) of hydrochloric acid so as to obtain a solution, called non-silicic solution (8), of at least one non-silicic component of asbestos (3) in the aqueous solution (5) of hydrochloric acid and a solid, called silicic solid (9), characterized in that the non-silicic solution (8) is subjected to a treatment, said precipitation treatment (13), in which a selective precipitation (13) of the cationic species of iron present in this non-silicic solution (8) is carried out. |