Hi dear Anvar If I was ...

Hi dear Anvar

If I was faced to such situation, I woud chose a normal solution of caustic or acid , then test the amounts in real process and then check the results in a pilot vol. in 500 or 1000 lit system. Simply you can estimate the amount of material and then calculate the dosing pumps efficiency. Please note that you should use a propper pH meter with Hi/Low out-puts. Also paralel dosing systems just in case of dosing system crash.

Calculation would be hard cuz some minerals can react like amphoters, complexants etc in some situations like temp, pressure and bio issues.

Good luck.