Resource-Saving Complex For Mine Water Demineralization

Authors

Anatoliy A. Tarelin, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky str., Kharkiv, 61046, Ukraine), ORCID: 0000-0001-7160-5726
V. H. Mykhailenko, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky str., Kharkiv, 61046, Ukraine)
O. V. Antonov, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky str., Kharkiv, 61046, Ukraine), e-mail: port342017@gmail.com
Andrey A. Tarelin, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky str., Kharkiv, 61046, Ukraine)

Abstract

The problem of the formation of a large number of highly mineralized mine waters, formed as a result of further exploitation of mines, and the tendency to increase the mineralization are shown. The existing technologies for cleaning mine water are analyzed. It is shown that in most cases they are exposed only to clarification and mechanical cleaning. Purified in this way, mine waters have increased mineralization and when discharged into surface water bodies, they contaminate them. Existing methods of deep processing of mineralized water including reverse osmosis desalination, further evaporation of the concentrate and crystallization of dry salts have not been used anywhere, because of the complexity of further processing of reverse osmosis concentrate. A complex drainless technology for deep treatment of mine waters of sulphate-chloride composition is proposed. The technology consists of sequential coagulation, and soda-lime softening. The resulting deposits after compaction and filtration on the filter press represent calcium-magnesium raw materials, which can be sold as commercial products for use in the construction industry, glass production, communal services, etc. In the future, after acid treatment, decarbonisation, and neutralization with a caustic soda water hardness is reduced to 0.5 mg-eq / dm3, which allows reverse osmosis filtration without inhibitors of sedimentation, this allows to obtain a phosphate-free end ntrate with a total salt content of approximately 80000 mg / dm3. After the addition of a small amount of caustic soda, the concentrate is evaporated and sodium sulfate is crystallized in the form of a ten-fold mirabilite, which after washing can be realized, the sodium chloride remaining in the mother liquor is isolated, followed by the realization. Based on the results of the development, the project (stage II) of the complex for the in-depth water treatment for the Lubelskaya mine has been completed, and preparations for the production of working documentation are in progress.

Keywords: mine waters; softening; electro-membrane processing; demineralization; reverse osmosis; evaporation with crystallization

Full text: Download in PDF

References

1. Galetsky, L. S., Slyadnev, E. A., & Yakovlev, V. A. (2006, September). Ecological and geological aspects of the formation of the quality of groundwater in the mining and industrial areas of Central Donbass. Aqua-Ukraine 2006. Proc. of IV Intern. Water Forum, (pp. 96–100), Kiyev (in Russian).
2. Frog, B. N. & Levchenko, A. P. (1996). Water Treatment: Manual for Universities. Moscow: Moscow State University Publishing House (in Russian).
3. Starikov, E. N. (2007, May). Membrane technologies for wastewater treatment. Water 2007. Pro. of II Intern. Conf., (pp. 98–107), Moscow (in Russian).
4. Zapolskyi, A. K., Mishkova-Klimenko, N. A., Astrelin, I. M., Brick, M. T., Hvozdyk, P. I., & Kniazkova, T. V. (2000). Basics of physical/chemical technologies of waste water treatment: Manual. Kiyev: Libra (in Russian).

Received 2 February 2018

Published 30 March 2018