Method for processing mine waters

摘要

Processing mine water (30), comprises (i) adding a hardness-free alkaline reagent (3) at least once to the mine water to be processed, for precipitating metals as hydroxides from the mine water, (ii) separating the precipitated metal hydroxides from the mine water, which is at least once treated with the hardness-free alkaline reagent, (iii) further treating the remaining mine water by adding a hardness-forming precipitation reagent, after separating the precipitated metal hydroxides, and (iv) adding a curing forming lime reagent (4) to the mine water for precipitating sulfate as gypsum. Processing mine water (30), comprises (i) adding a hardness-free alkaline reagent (3) at least once to the mine water to be processed, for precipitating metals as hydroxides from the mine water, (ii) separating the precipitated metal hydroxides from the mine water to be processed, which is at least once treated with the hardness-free alkaline reagent, (iii) further treating the remaining mine water by adding a hardness-forming precipitation reagent, after separating the precipitated metal hydroxides, and (iv) adding a curing forming lime reagent (4) to the mine water to be processed, which is separated from the precipitated metal hydroxides, and treated at least once by the hardness-free alkaline reagent, for precipitating sulfate as gypsum (16) from the mine water.