Chemistry - Metallurgy Question with Solution | TestHub

Sometimes, it is possible to separate two sulphide ores by adjusting proportion of oil to water or by using depressants. For example, in case of an ore containing$\mathrm{Z}\mathrm{n}\mathrm{S}$and$\mathrm{P}\mathrm{b}\mathrm{S}$, the depressant used is$\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{N}$. It selectively prevents$\mathrm{Z}\mathrm{n}\mathrm{S}$from coming to the froth but allows$\mathrm{P}\mathrm{b}\mathrm{S}$to come with the froth.