Research into adhesive ore-dressing technologies of fine- and nano gold

V. Biletskyi ¹

¹Department of Equipment of Oil and Gas Fields, Poltava National Technical Yuri Kondratyuk University, Poltava, Ukraine

Min. miner. depos. 2016, 10(4):19-28

https://doi.org/10.15407/mining10.04.019

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ABSTRACT

Purpose. To summarize domestic experience in creating technology for adhesive gold dressing and to describe key research results.

Methods. Laboratory experimental and pilot research into the process of obtaining adhesively active coal and oil granules carrying particles of gold and adhesive extraction of nano-, thin- and fine gold from ore slurry, preparing carrying granules and their microscopy, spectroscopy of the water phase, designing an experiment to obtain a statistical model of adhesive abilities of coal and oil granules-carriers.

Findings. . Regime map of oil granulation process to produce coal granules carrying particles of gold was experimentally obtained. Rational regime parameters for pelleting granules have been determined: consumption of coupling reagent; granulometric composition of initial coal; slurry concentration; pelleting duration; slurry agitation intensity. It is recommended to use as original material coal with ash content Ad = 10%; particle size –0.074 mm. Oil agent is oil of brand M100 and kerosene. The rational process schematics for adhesive gold dressing was developed, in particular, by cleaning flotation, which increases the extraction of Au up to 90% and allows to reach its environmental cleanliness nearly at the level of flotation. It is discovered for the first time that when the surface of coal oil granules is modified by crown ether, gold nanoparticles of the size 20 – 30 nm concentrate on it, which can be explained by the formation of supramolecular ensemble “crown ether – nano-gold”. The rational mode of pelleting has been substantiated and patented for the turbulence estimated by Reynolds number Re within 900 – 12000. Theoretical foundations of the mechanism for producing coal and oil granules-carriers were developed, including its phenomenological scheme. Subprocesses lying behind adhesive “coal-oil” contact have been analyzed and the elementary act of aggregation and granules-carriers’ formation has been investigated. The experiment was designed to obtain statistical models that describe the impact of various factors on stickability of “adhesive – substrate” (“coal-oil granules – gold”) combination.

Originality. The scientific basis was laid and experimental testing was performed to prove feasibility of gold dressing adhesive technology. Rational regime schematics and process parameters of adhesive gold dressing were grounded, it was discovered that under the impact of crown ether nano-gold concentrates on the surface of granules-carriers.

Practical implications. The results of laboratory and bench experimental studies can be used with sufficient accuracy to implement adhesive gold dressing of fine and nano-size particles within a “few hundred microns – a few tens of nanometers”.

Keywords: laboratory and pilot studies, adhesive gold dressing, schematics, operating parameters, crown ether, nano-gold

REFERENCES

Akcil, A., Wu, X.Q., & Aksay, E.K. (2009). Coal-Gold Agglomeration: An Alternative Separation Process in Gold Recovery. Separation & Purification Reviews, 38(2), 173-201.
https://doi.org/10.1080/15422110902855043

Beletskiy, V.S., Beskrovnaya, V.P., Rashkovskiy, G.B., Tikhonova, O.N., & Chernov, V.K. (1993). Razrabotka ekologicheski bezopasnoy tekhnologii izvlecheniya zolota iz rudnogo syrya na osnove protsessa adgezii. In SibEko’93 (pp. 6-7). Irkutsk: Irkutskiy politekhnicheskiy institut.

Beletskiy, V.S., & Elishevich, A.T. (1994). Adgezionnyy metod izvlecheniya zolota iz rud i rossypey. In BRM-94: Blagorodnye i Redkie Metally (pp. 25-26). Donetsk: Donetskyi natsionalnyi tekhnichnyi universytet.

Beletskiy, V.S., Rashkovskiy, G.B., Elishevich, A.T., Zborshchik, M.P., Chernov, V.K., & Tikhonova, O.N. (1995). Sposob izvlecheniya zolota iz rud i rossypey. Patent No 2047381, Russia.

Beletskiy, V.S., & Samoylov, A.I. (1993). Issledovanie protsessov maslyanoy aglomeratsii uglya kak osnovy adgezionnogo obogashcheniya zolota. Research Report (UА01001064Р). Donetsk: Donetskyi derzhavnyi politekhnichnyi universytet.

Biletskyi, V.S. (2014). Vyprobuvannia protsesu adheziinoho zbahachennia zolota ta vykorystannia krauneteru dlia yoho intensyfikatsii. Zbahachennia Korysnykh Kopalyn, 58(99)-59(100), 201-206.

Biletskyi, V.S. (2015). Vitchyzniani doslidzhennia adheziinoho zbahachennia zolota. Zbahachennia Korysnykh Kopalyn, 61(102), 114-119.

Biletskyi, V.S., & Hrabovetska, A.S. (2007). Sposib vyluchennia zolota z rud i rozsypiv. Patent No 31453, Ukraine.

Biletskyi, V.S., & Serhieiev, P.V. (2000). Rozrobka naukovykh osnov protsesu adheziinoho zbahachennia tonkodyspersnoho zolota. Research Report (DR 0199U001117). Donetsk: Donetskyi derzhavnyi politekhnichnyi universytet.

Biletskyi, V.S., & Serhieiev, P.V. (2002). Matematychne modeliuvannia protsesu adheziinoho kontaktu “vuhlemasliana rechovyna – zoloto”. Naukovi pratsi Donetskoho derzhavnoho tekhnichnoho universytetu, (42), 39-42.

Bellamy, S.R., House, C.I., & Veal, C.J. (1989). Recovery of Fine Gold from a Placer Ore by Coal Gold Agglomeration. In Gold Forum on Technology and Practices – World Gold’89 (pp. 347-352). Littleton, Colorado: Society for Mining, Metallurgy and Exploration.

Bonny, C.F. (1988). Coal-Gold Agglomeration. In Rand Gold Conference. Arizona.

Cadzow, M., & Lamb, R. (1989). Carbed Gold Recovery. In Gold Forum on Technology and Practices – World Gold’89 (pp. 375-379). Littleton, Colorado: Society for Mining, Metallurgy and Exploration.

Coal-Gold Agglomeration. (1990). Mining Journal, 314 (8070), 382.

Elishevich, A.T., Beletskiy, V.S., Sergeev, P.V., Papushin, Yu.L. (1992). Razrabotka rezhima formirovaniya uglemaslyanykh granul dlya protsessa adgezionnogo izvlecheniya zolota. Research Report. Donetsk: Donetskyi derzhavnyi politekhnichnyi universytet.

House, C.J., Townsend, I.G., & Veal, C.J. (1988). Coal Gold Agglomeration. International Mining, 50(9), 17-19.

House, C.J., Townsend, I.G., & Veal, C.J. (1988). Coal-Gold Agglomeration – Pilot Scale Retreatment of Tailings. In Randol International Gold Conference (pp. 111-116). Perth, Australia.

Hrabovetska, A.S. (2007). Doslidzhennia ta rozrobka osnov adheziinoi tekhnolohii zbahachennia zolota. Master’s work. Donetsk: Donetskyi natsionalnyi tekhnichnyi universytet.

Kkheloufi, A., Samylin, V., & Beletskiy, V. (2000). Tekhnicheskie resheniya dlya obogashcheniya zolotosoderzhashchikh rud Alzhira. In BRM-2000: Blagorodnye i Redkie Metally (pp. 173): Donetsk: Donetskyi natsionalnyi tekhnichnyi universytet.

Kopgli, R., Kwakye, S., Boateng, A., Domfeh, J., Anderson, A., Wilson, R., Aglubi, E., & Manaseh, Y. (2015). Coal Gold Agglomeration. Research Report.

Litsenziia na vuhilno-ahlomeratsiinyi protses vyluchennia zolota. (1990). Mining Journal, 314(8066), 297-298.

Mainwaring, D., & Cadzow, M. (1989). Extraction of Diamonds and Precious Metals. Patent No 589291, Australia.Mcclelland, G.E., & Hill, S.D. (1981). Silver and Gold Recovery from Low Grade Resources. American Mining Congress Journal, 67(6), 17-23.

Mlaki, A., Katima, J., & Kimweri, H. (2011). Gold Recovery from Gold Bearing Materials Using Bio-Diesel, Vegetable Oils and Coal. Engineering, 3(5), 555-560.
https://doi.org/10.4236/eng.2011.35065

Samylin, V., Samylin, S., & Biletskyi, V. (2010). Tekhnolohiia rozrobky tonkozernystoi fraktsii zolotovmisnykh rud. Donetskyi Visnyk Naukovoho Tovarystva im. Shevchenka, (29), 113-122.

Sandhurst Project to Recover Gold from Australian Tailings. (1987). Engineering and Mining Journal, 188 (1), 14-15.

Sen, S., Akar, G., Cilingir, Y., Malayoglu, U., Tanriverdi, M., & Ipekoglu, U. (2013). The Effects of Various Flotation Parameters on Gold Recovery by Coal-Oil Assisted Gold Flotation. Separation Science and Technology, 48(10), 1585-1590.
https://doi.org/10.1080/01496395.2012.751425

Steed, J.V., & Atwood, J.L. (2007). Supramolecular Chemistry. New York: John Wiley & Sons, Ltd.

Volchkova, E.V., Mishchikhina, E.A., Buslaeva, T.M., & Gromov, S.P. (2013). Ekstraktsiya blagorodnykh metallov makrotsiklicheskimi soedineniyami. Moskva: Izdatel’stvo Moskovskogo gosudarstvennogo universiteta tonkikh khimicheskikh tekhnologiy.