A method of benefiting by dissolution a successfully depleted mineral deposit containing potassic chloride and sodium chloride. (Machine-translation by Google Translate, not legally binding)

摘要

A method of benefiting by dissolution a substantially depleted mineral deposit containing potassium chloride and sodium chloride in a residual underground cavity having a perimeter deployment of said ore deposit comprising the operations of: (a) introducing water into said cavity, (b) allowing a sufficient dwell time of said water in said cavity to create a solution of said chlorides under conditions of approximately equilibrium at about the temperature of said underground reservoir, (c) withdrawing said solution from said cavity while at the same time time the removed solution is replaced by adding more water to said cavity to maintain a preselected water level therein, (d) supplying the removed solution to at least one solar evaporation pond and leaving it there until substantial precipitation occurs of potassium chloride, (e) recirculate the brine from said solar pond to dich to cavity, (f) removing the potassium chloride precipitated from said pond, (g) then supplying the remaining brine and suspension to a factory for the recovery of additional potassium chloride therefrom by usual separation means, and (h) ) recirculate the remaining brine from said factory to said cavity. (Machine-translation by Google Translate, not legally binding)