Application of spiral separation technology in coal sludge processing

The purpose of the study is to analyze the current state of the problem concerning the concentration technology of wash house coal sludge, comparison of the results of sludge dump coal processing on various types of processing equipment as well as formulation of recommendations for spiral separation method application for coal sludge enrichment. The main research methods include generalization and analysis of scientific and technical information, study of the results of technological tests on spiral separation. The problem of sludge concentration is relevant due to the increase in the content of fine classes in mined coal and, consequently, in coal sludge. In real practice most of the sludge is fuel for energy. Having analyzed the experimental part of the research, the authors established the efficiency of coal and rock fraction separation using the technology of coal sludge spiral separation. The need for preliminary classification of the source material before spiral separation is determined. It is found out that spiral sludge separators have a number of technological advantages as compared to spiral mineral separators, due to a wider range of enriched material fineness. The analysis of the performed tests made it possible to establish the application prospects of the spiral separation technology in coal sludge processing. The recommendations are given on the use of spiral separators manufactured by the Research and Production Company Spirit, LLC for the enrichment of sludge products including tailings, dump sludge of the work site of the Wash House of the Branch Open Pit Cheremkhovugol of Vostsibugol Company, LLC.

1. Sokur A. K. Review of gravitational concentration technologies for coal slimes of non-flotation size. Obogashchenie poleznykh iskopaemykh: nauch.-tekhn. sb. 2012; 51:126-136. (In Ukrainian).

2. Polulyakh A. D., Polulyakh D. A. Use of heavy-medium hydrocyclones for coal benefication. Obogashchenie poleznykh iskopaemykh: nauch.-tekhn. sb. 2011;47:116-126.

3. Zarubin L. S., Iofa M. B. Foreign technology of coal deep enrichment and desulfurization in heavy-medium hydrocyclones abroad: review. Moscow: Central Research Institute of Economics and Scientific and Technical Information of the Coal Industry; 1980. 29 p. (In Russ.).

4. Kochetov V. V., Levandovich A. P., Berinberg Z. Sh., Kirnarskii A. S., Pilov P. I. Use of spiral separators in coal concentration. Obogashchenie polezny iskopaemykh. 1998;1:80-87. (In Russ.).

5. Sipotenko A. I., Kotkin A. M., Peremezhko E. A. Improving methods and technology of sludge treatment to reduce their output as a separate commercial product. Moscow: TsNIEI Ugol'; 1991. 56 p. (In Russ.).

6. Damba A., Stanis E. V. The use of an integrated geo-ecological assessment in environmental audit at the open coal mining in Mongolia. Vestnik Rossiiskogo universiteta druzhby narodov. Seriya: Ekologiya i bezopasnost' zhiznedeyatel'nosti = RUDN Journal of Ecology and Life Safety. 2015;2:100-106. (In Russ.).

7. Trubetskoi K. N. The current state of the mineral resource base and mining industry in Russia. Gornyi zhurnal. 1995;1:3-7. (In Russ.).

8. Trubetskoi K. N., Umantsev V. N., Nikitin M. B. Classification of technogenic deposits, main categories and concepts. Gornyi zhurnal. 1989;12:6-9. (In Russ.).

9. Shadrunova I. V., Zelinskaya E. V., Volkova N. A., Orekhova N. N. Mining waste: resource potential and processing technologies (on the example of Siberia and the Urals). In: Sovremennye problemy kompleksnoi pererabotki trudnoobogatimykh rud i tekhnogennogo syr'ya (Plaksinskie chteniya – 2017): materialy Mezhdunar. nauch. konf. = Modern problems of complex processing of refractory ores and technogenic raw materials (Plaksinsky Readings – 2017): materials of the International scientific conference. 12–15 September 2017, Krasnoyarsk. Krasnoyarsk: Siberian Federal University; 2017, p. 15–21. (In Russ.).

10. Bobrikov V. V., Kalabukhov M. L., Kanev N. I. Research and improvement of coal sludge classification and enrichment at the Pecherovskaya Central Preparation Plant. In: III Kongress obo-gatitelei stran SNG = 3d CIS Congress of the Mineral Processing Engineers. 19–22 March 2001, Moscow. Moscow: National University of Science and Technology (MISiS); 2001, p. 69–75. (In Russ.).

11. Kirnarskii A. S., Artemov S. V., Gaevoi V. V. Influence of initial product preparation conditions on the results of coal wet spiral separation. Obogashchenie polezny iskopaemykh. 1998;1:126-127. (In Russ.).

12. Prokop'ev S. A., Ponomareva A. M., Bolotin M. L. Processing of technogenic raw materials of a coal washing plant. In: Ekologicheskie problemy i novye tekhnologii kompleksnoi pererabotki mineral'nogo syr'ya (Plaksinskie chteniya – 2002): materialy Mezhdunar. soveshch. = Environmental problems and new technologies for the complex processing of mineral raw materials (Plaksinsky readings – 2002): materials of the International meeting. 16–19 September 2002, Chita. Chita: PKTs-Al'teks; 2002, p. 79–82. (In Russ.).

13. Kirnarskii A. S. he principle of single functionality of separation processes under hard coal benefication. Ugol' = Russian Coal Journal. 2012;5:94-96. (In Russ.).

14. Novak V. I., Kozlov V. A. Review of modern coal sludge concentration methods. Gornyi informatsionnoanaliticheskii byulleten' (nauchno-tekhnicheskii zhurnal) = Mining informational and analytical bulletin (scientific and technical journal). 2012;5:130-138. (In Russ.).

15. Kozlov V. A., Novak V. I. Optimizing coal preparation plant performance towards maximum concentrate yield. Gornyi informatsionno-analiticheskii byulleten' (nauchno-tekhnicheskii zhurnal) = Mining informational and analytical bulletin (scientific and technical journal). 2019; 4:175-186. (In Russ.). https://doi.org/10.25018/0236-1493-2019-04-0-175-186.

16. Belousov V. A. Main directions of coal flotation enrichment intensification. Mezhdunarodnyi zhurnal prikladnykh i fundamental'nykh issledovanii. 2014;11-5:719-721. (In Russ.).

17. Kozlov V. A., Kozlov E. V. Selection of the most rational evaluation methods of coal washability to be applied when designing concentration plants. Gornyi informatsionno-analiticheskii byulleten' (nauchno-tekhnicheskii zhurnal) = Mining informational and analytical bulletin (scientific and technical journal). 2012;4:150-155. (In Russ.).

18. Belousov V. A. Promising methods of coal sludge enrichment. Mezhdunarodnyi zhurnal prikladnykh i fundamental'nykh issledovanii. 2014;4:15-17. (In Russ.).

19. Grishin I. A., Knyazbaev Z. S. To the enrichment method choice problem for coals of various stage of the metamorphism. Uspekhi sovremennogo estestvoznaniya. 2016;1:107-110. (In Russ.).

20. Sosnovskii S. A., Sachkov V. I. Complex processing of technogenic coal-containing raw materials. In: Problemy kompleksnoi i ekologicheski bezopasnoi pererabotki prirodnogo i tekhnogennogo mineral'nogo syr'ya (Plaksinskie chteniya – 2021): materialy Mezhdunar. nauch. konf. = Problems of complex and environmentally safe processing of natural and technogenic mineral raw materials (Plaksinsky readings – 2021): materials of the International scientific conference. 4–8 November 2021, Vladikavkaz. Vladikavkaz: North Caucasian Institute of Mining and Metallurgy (State Technological University); 2021, p. 498–501. (In Russ.).