Abstract
Problem Statement (Relevance): The relevance of the problem under consideration is due to the fact that if a concentration plant uses a water recirculation system and if the dehydration processes lack efficiency, the circulating water gets saturated with slurries of less than 5 microns. The negative effect of slurries is reflected in the product filtration indicators. Thus, the filter throughput drops and the final products become more moist. Objectives: The objective of this research is to identify the cause of the decreased performance of the filtering equipment and to come up with good solutions for the problem. Methods Applied: Size distribution analysis of the concentration products using Fritsch’s Analysette 22 laser diffraction analyzer; mineralogical analysis of the filtered products, selection of the flocculant for efficient thickening and filtration of flotation concentrates; microscopic analysis of internal pores of ceramic filtering plates. Originality: This research provides a comprehensive approach to solving the problem of filtering fine slurries and identifying factors that may impact the process performance. Findings: The authors found what caused the plugging of pores in the filters and how to increase the throughput and reach the design moisture content parameters in the final product. Practical Relevance: The results of this research can be useful for mining companies relying on dewatering processes for concentrates and flotation tailings so that they can be stored as dry products.
Keywords
Thickening, filtration, particle size analysis, mineralogical analysis, ceramic filter, filter press, flocculants.
1. Beloglazov I.N. Filtrovanie tekhnologicheskikh pulp [Filtration of process slurries]. Moscow: Ore and Metals Publishing house, 2003, 320 p. (In Russ.)
2. Bondar V.V., Krasny B.A. Current status and prospects of using ceramic vacuum disc filters in dewatering processes of mining and processing sites. Obogashchenie rud [Beneficiation of ores], 2007, no.2, pр. 39–43. (In Russ.)
3. Alekseeva E.A., Brichkin V.N., Nikolaeva N.V., Bilenko L.F. Prospects of using membrane filters at mining and processing sites. Obogashchenie rud [Beneficiation of ores], 2013, no. 3. (In Russ.)
4. Brichkin V.N., Dubovikov O.A., Nikolaeva N.V., Besedin A.A. Dehydration of red mud and main processing techniques. Obogashchenie rud [Beneficiation of ores], 2014, no. 1. (In Russ.)
5. Sizyakov V.M., Dubovnikov O.A., Nikolaeva N.V. Understanding the homogenous disperse system separation process in bauxite conditioning. Zapisi Gornogo instituta [Proceedings of the Mining Institute], 2013, vol. 202, pр. 56–62. (In Russ.)
6. Kozhonov A.K., Yashchuk A.A., Duyshonbaev N.P. Studying the condensability of the flotation products by polymer flocculants and the effect of flocculants on the filtration process. Tekhnicheskie nauki – ot teorii k praktike: sb. st. po mater. XLI mezhdunar. nauch.-prakt. konf. # 12(34). Ch. II [Engineering sciences – From theory to practice: Proceedings of the XLI International Conference No. 12 (34). Part II]. Novosibirsk: SibAK, 2016, pр. 32–47. (In Russ.)
7. Orozova G.T., Kozhonov A.K., Molmakova M.S. Comprehensive solutions for the intensification of the thickening process. Tekhnicheskie nauki – ot teorii k praktike: sb. st. po mater. LXII mezhdunar. nauch.-prakt. konf. # 9(57) [Engineering sciences – From theory to practice: Proceedings of the LXII International Conference No. 9(57)]. Novosibirsk: SibAK, 2016, pр. 32–40. (In Russ.)
8. Bauman A.V. Thickening and water circulation in non-ferrous metallurgy industry. Sbornik dokladov VII Mezhdunarodnogo Kongressa “Tsvetnye metally i mineraly” [Proceedings of the VII International Congress on Non-Ferrous Metals and Minerals]. Krasnoyarsk, 2015, pp. 791–795. (In Russ.)
9. Mizra S., Richardson J.F. Sedimentation of suspension of particles of two or more sizes. Chem. Eng. Sci. 1979. V. 34. P. 447–454.
10. Method 8006 (DOC316.53.01139). Suspended Solids. Photometric Method (750 mg/L TSS). Edition 9. HACH Company, 2014. 4 p.
11. Porter J.L., Scandrett H.F. Interpretation of settling test data for esmnbgtion of area requirements for settling and consolidation of nuds. Extractive Metallurgy of Aluminium. 1963, vol.1, pp. 95–112.
12. Talmage S.P., Fitch E.B. Determining of unit area thickeners. Industrial and Engineering Chemistry. 1955, vol. 47, no 1. 17 р.
13. Fitch B. Current thecru and thiekener design. An autnoritativseritigue of the establisned and recently pripcsed methods thiekener design. Industrial and Engineering Chemistry. 1966, vol. 58, no 10, pp. 18–28. DOI: 10.1021/ie50682a006
14. Method 8006 (DOC316.53.01139). Suspended Solids. Photometric Method (750 mg/L TSS). Edition 9. HACH Company, 2014. 4 p.