THERMOCHEMICAL ENRICHMENT OF COPPER TAILINGS WITH OBTAINING WHITE SOOT

The article presents the results of thermochemical enrichment of waste copper tailings. Studies on sintering the concentrate with alkali have established the formation of silicate and sodium aluminosilicate. The extraction of silicon into the solution, depending on the sintering temperature in the range of 250-500°C, increases from 59,96% to 70,40%. After water leaching of cake under the following conditions: L:S = 3:1 temperature 60°C; duration of 60 minutes, the copper content in the cake increases on average 1,2 times.
To isolate white soot from a silicate solution, carbon dioxide was used as a neutralizing agent. White soot was obtained by two-stage carbonization of a silicate solution with carbon dioxide in a recirculation system, bringing the pH to 9-10. The influence of the duration of deposition, temperature, and concentration of the silicate solution on the specific surface area (Ssp., m²/g) of white soot was studied. It has been established that with increasing carbonization time and solution temperature, the specific surface area of white soot decreases. It was found that at a temperature of 25°C, a process duration of 50 minutes and a final pH = 9,7 units. white soot is formed with a specific surface area of 200 m²/g.
After removing aluminum oxide impurities with a sulfuric acid solution at a temperature of 80°C, white soot corresponding to the BS-100 grade was obtained.

1. Investigation into the Question of Complex Processing of Bauxites of the Srednetimanskoe Deposit / I.V. Loginova et al // Russian Journal of Non-Ferrous Metals. – 2013. – V. 54. – P. 143-147. (In English).

2. Loginova I.V. Extraction of Rare-Earth Metals During the Systematic Processing of Diaspore Boehmite Bauxites / I.V. Loginova, A.A. Shoppert, L.I. Chaikin // Metallurgist. – 2016. – V. 60. – P. 198-203. (In English).

3. Karshigina Z.B. Kompleksnaya pererabotka kremniisoderzhashchikh mineral'nykh I tekhnogennykh obrazovanii s polucheniem osazhdennogo dioksida kremniya i izvlecheniem redkozemel'nykh metallov. disS….phD: zashchishchena 22.12.2016 / Karshigina Zaure Baitasovna. – Almaty, 2016. – 147 s. (In Russian).

4. Sadyralieva U.ZH. Khimicheskoe obogashchenie nefelinovykh sienitov s polucheniem kontsentrata redkozemel'nykh ehlementov / U.ZH. Sadyrgalieva // Izvestiya VUZov Kyrgyzstana. – 2015. – № 2. – C. 45-47. (In Russian).

5. Izvlechenie kremniya iz shlakov fosfornogo proizvodstva rastvorami karbonata natriya / E.G. Bochevskaya i dr. // Kompleksnoe ispol'zovanie mineral'nogo syr'ya. – 2006. – № 3. – S. 29-34. (In Russian).

6. Vozmozhnost' ispol'zovaniya otkhodov khimicheskikh i metallurgicheskikh predpriyatii Kazakhstana dlya polucheniya osazhdennogo dioksida kremniya / Z.S. Abisheva i dr. // Kompleksnoe ispol'zovanie mineral'nogo syr'ya. – 2006 – № 2 – S. 70-75. (In Russian).

7. Alkali fusion-leaching method for comprehensive processing of fly ash / A.A. Shoppert et al // Technogen Conference Proceedings, KnE Materials Science. – 2017. – № 1. – R. 89-96. (In English).

8. Shoppert A.A. Novel Method for Comprehensive Processing of Low-Grade Copper Concentrate / A.A. Shoppert, L.M. Karimova, D.V. Zakharyan // Materials Engineering and Technologies for Production and Processing IV, Solid State Phenomena. – 2018. – V. 284. – R. 856-862. (In English).

9. A.s. 345763 SSSR, MPK C01B 33/12(2006.01) C09C 1/30(2006.01). Sposob polucheniya beloi sazhi / A.I. Ilyasov, E.P. Poplyakov, V.F. Sobolev; zayavl. 29.04.70; opubl. 30.01.78. Byul. № 4. – 2s. (In Russian).

10. Osazhdenie amorfnogo dioksida kremniya iz silikatnykh rastvorov, poluchennykh posle pererabotki mineral'noi vysokokremnistoi rudy / E.G. Bochevskaya i dr. // Vestnik nauki I obrazovaniya. – 2017. – № 12(36), T.1. – S. 18-23. (In Russian).

11. Pat. 24434 RK, S 01 V 33/18. Sposob polucheniya beloi sazhi iz silikatno-kal'tsievykh shlakov fosfornogo proizvodstva / Abisheva Z.S., Bochevskaya E.G., Karshigina Z.B., Zagorodnyaya A.N., Frangulidi L.KH., Sharipova A.S.; zayavitel' i patentoobladatel' AO «TSNZMO». – № 2008/0542.1; zayavl. 08.05.08. opubl. 15.08.2011, Byul. № 8. (In Russian).

12. Technology of phosphorus slag processing for preparation of precipitated silica. Z.S. Abisheva et al // J. Theoretical Foundations of Chemical Engineering, July, 2013 – V. 47, № 4. – R. 428-434. (In English).

13. Izvlechenie redkozemel'nykh metallov iz shlakov fosfornogo roizvodstva i poluchenie silikatnogo rastvora / Z.B. Karshigina i dr. // Kompleksnoe ispol'zovanie mineral'nogo syr'ya. – 2016. – № 2. – S. 18-25. (In Russian).

14. Recovery of rare earth metals and precipitated silicon dioxide from phosphorus slag / Z. Karshigina et al // J. Minerals Engineering. – 2015. – V. 77. – R. 159-166. In English).

15. Bochevskaya E.G. Osazhdenie amorfnogo dioksida kremniya iz silikatnykh rastvorov, poluchennykh posle pererabotki mineral'noi vysokokremnistoi rudy / E.G. Bochevskaya, Z. Karshigina, EH. Sargelova // Vestnik nauki i obrazovaniya. – 2017. – № 12(36). – S. 18-23. (In Russian).

16. Kutishcheva E.S. Sposoby polucheniya vysokodispersnogo dioksida kremniya / E.S. Kutishcheva, I.O. Usol'tseva, YU.V. Perederin // Polzunovskii vestnik. – 2021. – № 2. – S. 188-193. DOI: https://doi.org/10.25712/ASTU.2072-8921.2021.02.026. (In Russian).

17. Panina O.D. Issledovanie vliyaniya razlichnykh faktorov na velichinu udel'noi poverkhnosti dioksida kremniya / O.D. Panina, YU.V. Perederin, I.O. Usol'tseva // VI Vserossiiskaya konferentsiya «Khimiya i khimicheskaya tekhnologiya: dostizheniya i perspektivY», Iz-vo: Kuzbasskii gosudarstvennyi tekhnicheskii universitet imeni T.F. Gorbacheva. – 2022. – S. 116-118. (In Russian).

18. Pat. 2740995 Rossiiskaya Federatsiya, MPK 51 C01B 33/18, C01B 33/193. Sposob polucheniya mikrokremnezema iz prirodnogo diatomita osazhdeniem rastvora azotnoi kisloty / Selyaev V.P., Kupriyashkina L.I., Sedova A.A., Karandashov D.L., Mukhanov M.A.; patentoobladatel' FGBOUVO «Natsional'nyi issledovatel'skii Mordovskii gos. univ-t im. N.P. OgarevA». – № 2020116983; zayavl. 22.05.2020; opubl. 22.01.2021. Byul. № 3. (In Russian).

19. Pat. 2023664 Rossiiskaya Federatsiya, MPK S01V 33/18. Sposob polucheniya osazhdennogo kremnezemnogo napolnitelya / Derevyanko V.V., Sobolev V.F., Poplyakov E.P., Zverev YU.N., Balabanov V.M.; patentoobladatel' Sobolev Valentin Fedorovich. № 5019457/26; zayavl. 23.09.1991; opubl. 30.11.1994. Byul. № 24. (In Russian).

20. Pat. 2625114 Rossiiskaya Federatsiya, MPK S 01 V 33/18. Sposob polucheniya tonkodispersnogo amorfnogo mikrokremnezema zol'-gel' metodom / Selyaev V.P., Sedova A.A., Kupriyashkina L.I., Osipov A.K., Selyaev P.V.; patentoobladatel' FGBOUVO «Natsional'nyi issledovatel'skii Mordovskii gos. univ-t im. N.P. OgarevA». № 2016115956; zayavl. 22.04.2016; opubl. 11.07.17. Byul. № 20. (In Russian).

21. Pat. 2156734 Rossiiskaya Federatsiya, MPK S 01 V 33/18 Sposob polucheniya beloi sazhi / Druzhbin G.A., Karapira N.I., Kuznetsov I.O., Chudnovtsev V.I.; patentoobladatel' Kuznetsov Igor' Olegovich. № 2000107665/12; zayavl. 30.03.2000 g.; opubl. 27.09.2000. Byul. № 27. (In Russian).

22. Nazharova L.N. Poluchenie mikrochastits «beloi sazhI» iz kislykh zolei / L.N. Nazharova, D.I. Galimbekova // Vestnik kazanskogo tekhnologicheskogo universiteta. – 2010. – № 8. – S. 284-287.

23. GOST 18307-78. Sazha belaya. Tekhnicheskie usloviya. – M.: Izd-vo standartov, 1978. – 19 s. (In Russian).