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ArticleName Synthesis of sodium polysulphide for copper ore processing
DOI 10.17580/nfm.2017.02.01
ArticleAuthor Osserov T. B., Ketegenov T. A., Guseynova G. D., Chepushtanova T. A.
ArticleAuthorData

Satbayev University, Almaty, Kazakhstan:

T. B. Osserov, PhD Student, e-mail: x_tios_x@mail.ru
G. D. Guseynova, Associate Professor
T. A. Chepushtanova, Associate Professor


Al-Farabi Kazakh National University, Almaty, Kazakhstan:

T. A. Ketegenov, Professor

 

P. Balaz (Slovak Academy of Sciences, Slovakia) and K. K. Mamyrbaeva (Satbayev University, Kazakhstan) were also the participants in this work.

Abstract

Sodium polysulphide consists of yellow-brown, yellow-green crystals. Its chemical formulas are Na2S2, Na2S3, Na2S4. Currently there are several known methods for the production of sodium sulfide: chemical reduction of sodium sulphate by solid carbonaceous material; reduction of sodium sulfate by gaseous reductant; absorption of hydrogen sulphide with sodium hydroxide; electrolytic (amalgam) method; exchange decomposition of barium sulfide with sulfate, carbonate and sodium hydroxide. In addition to the known methods for the preparation of sodium polysulphide, there are electrochemical methods for the preparation of polysulphides that have been discovered in a long time and have received potentities: an electrochemical method for producing sodium polysulphide, an electrochemical method for producing alkali metal polysulphides. We examined the main standard methods for the preparation of sodium polysulphide, using mechanochemical activation. The mineralogical composition of the ore was analyzed, which allows us to conclude that it is possible to use mechanochemical sulphiding. Synthesis of the sulfidizer was carried out using elemental sulfur, caustic soda and sulphonic acid, in a planetary centrifugal mill mark “Pulverizette 6 classic line”. Several modifications of sodium polysulphide have been developed, differing in the ratios of the reacting substances that have been tested in the flotation enrichment of the Irtysh deposit. During the testing of various modifications of polysulphides, the best result was revealed which showed an increased copper recovery into the concentrate by 8.98%. To determine the significance of the influence of polysulphide constituents and their consumption on flotation, as well as on the selectivity index, graphical data were presented on the dependence of the change in copper, zinc and selectivity on the ratio of the content in polysulfide: sulfur and caustic sodium, sulfur and sulfonic acid, sodium and sulfonic acid. Based on the data on the approbation of sodium polysulfide in flotation experiments, as well as graphical data, a correlation analysis was performed that showed the best ratio of polysulphide components that would allow higher copper recovery and higher selectivity.

keywords Sulphidation, mechanochemical activation, planetary centrifugal mill, polysulphide, flotation, copper ore, concentrate
References

1. Xingwen Yu, Arumugam Manthiram. Highly Reversible Room-Temperature Sulfur. Long-Chain Sodium Polysulfide Batteries. Physical Chemistry Letters. 2014. No. 5(11). pp. 1943–1947.
2. Innovation patent RK No. 28327. Electrochemical method of producing sodium polysulphide. Baeshov A., Konurbayev A. Ye., Baeshova A. K. Publ. 15.04.2014; bull. No. 4.

3. Innovation patent RK No. 27454. Electrochemical method for obtaining polysoulphides of alkaline metals. Baeshov A., Konurbayev A. Ye., Baeshova A. K., Dikhanbaev A. B., Zhurinov M. Zh. Publ. 15.10.2013; bull. No. 10.
4. Dariusz Oleszak. Application of Mechanical Alloying. Mechanochemistry for Synthesis of Functional and Structural Materials. Conference Tools for Materials Science & Technology. 2016.
5. Carlier L. Greener pharmacy using solvent-free synthesis: investigation of the mechanism in the case of dibenzophenazine. Powder Technologies. 2013. Vol. 240. pp. 41–47.
6. Xiaozhi Lim. Grinding Chemicals Together in an Effort to be Greener. The New York Times. ISSN 0362-4331. (July 18, 2016). Retrieved August 6, 2016.
7. Osserov Т., Guseynova G. Pre-processing of copper ore mechanoactivation. Industry of Kazakhstan. 2016. No. 5(98). pp. 73–75.
8. Osserov Т., Guseynova G. Modeling and optimization of slime yield during mechanoactivation of copper ore. IX International Symposium “Physics and Chemistry of Carbon Materials / Nanoengineering”. 2016. pp. 233–236.
9. Majid Abdellahia, Maryam Bahmanpour. A Novel Technology for Minimizing the Synthesis Time of Nanostructured Powders in Planetary Mills. Materials Research. 2014. No. 17(03). pp. 781–791.
10. Moimane T. M., Korin K. C., Wiese J. G. Investigation of the interactive effects of the reagent suite in froth flotation of a Merensky ore. Minerals Engineering. 2016. Vol. 96–97. pp. 39–45.
11. Baláž P., Zorkovská A., Baláž M., Kovác J., Tešinský M., Osserov T., Guseynova G., Ketegenov T. Mechanochemical Reduction of Chalcopyrite CuFeS2: Changes in Composition and Magnetic Properties. Acta Physica Polonica A. 2017. No. 4, Vol. 131. pp. 1165–1168.
12. Almeida T. Ch., Garcia E. M., Silva H. W. A., Matenzio T., Lins V. F. C. International Journal of Mineral Processing. 2015. No. 25. p. 149.

Full content Synthesis of sodium polysulphide for copper ore processing
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