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UDC 628.165:66.081.63

Kurdiumov V. R., Timofeev K. L., Kraiukhin S. A.

Specific features of using reverse osmosis for mine water treatment

Summary

The possibility of using reverse osmosis for treatment of mine water from dead copper-nickel pits was studied. The composition of mine water was, mg/dm³: Mn 0,6–1; Fe 0,01–0,1; Ni 0,8–1,5; Cu 0,3–0,5; Zn 0,05–0,25; Co 0,02–0,07; Na 35–50; Ca 125–150;
Mg 35–45; SO4 100–200; Cl 65–75; Al 0,02–0,05; Si 9–11; Se 0,1–0,2; As < 0,005; Te < 0,005; Pb < 0,005; Hg < 0,00005; salt content 750–850; total hardness 9.5–11.5 °dGH; рН 7–7.5. The studies were carried out in a pilot plant with a capacity of 1 m³/h with original mine water. The plant included ultrafiltration and reverse osmosis modules. The permeate yield varied in the range of 50–75% of the original water volume. The method of chemical mine water demanganation and de-ironing at the primary treatment stage was tested. The quality of effluent (permeate) fully conforms to the drinking water requirements. The operating conditions of the pilot plant are described; the chemical unit consumption is presented. The specific features of using reverse osmosis technology for mine water treatment are described. The basic performance indicators of the reverse osmosis unit in terms of the equivalent amount of 1 m³/h at
the effluent output of 75% of the inflow are presented. The method of concentrate utilization is described providing its yield is reduced to 5% which makes it possible to extract valuable admixtures (non-ferrous metals).

Key words

deferrization , reverse osmosis , ultrafiltration , stability index , demanganization , concentrate utilization , mine water , non-ferrous metals

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