| Reaching ruthenium from waste high temperature alloy was studied by using a technique combined the alkali roasting with water-leaching. The effects of the ratio of alkali to material, roasting temperature and time, water leaching temperature and time on the leaching rate of ruthenium were investigated. The experimental results show that the ratio of alkali to material and roasting temperature greatly affected the leaching rate of ruthenium. The optimal conditions are as follows: using an 8:1 ratio of alkali to material, roasting at 600℃ for 1 hour, water-leaching at 95℃ for 3 hours. Under these conditions, the leaching rate of ruthenium was 98.3%. |
