FIELD: mining industry and heating engineering.
SUBSTANCE: liquid phase of high-temperature hydrothermal heat carrier is subjected to ageing during which polymerization of silicic acid takes part to form colloidal silica particles. Metal cations, in particular magnesium cations, are then added while increasing pH of solution to 10-12 and thereby initiating coagulation, flocculation, and sedimentation of floccules in the form of sludge. The latter is dried and thermally treated to give magnesium silicate.
EFFECT: enabled control of silicon compound precipitation kinetics, control of residual silicon compound concentration, and sedimentation of material rich in metal from hydrothermal heat carrier.
1 dwg, 1 tbl, 4 ex
