Methods of phase chemical analysis of iron ores have not been sufficiently developed. Methods for the separate determination of iron oxides, hydroxides, and silicates have been particularly poorly studied. In their study, it is possible to apply sample treatment with gaseous hydrogen chloride. Unlike chlorine, a common and well‑studied chlorinating agent, hydrogen chloride is not an oxidizing agent and does not change the valence of iron in the initial compounds when they are converted to chlorides ...

The flotability of a mineral is influenced by the electrical characteristic of the boundary layer in the mineral solution system. Therefore, it is important to correctly determine the point of zero charge, which characterizes the absence of a double electric layer. It can be found by measuring the capacitance of this layer. ...