Bench-scale testing of mixed-mode application of modified reagents to enhance efficiency of froth separation of diamond-bearing raw materials in closed water circulation system

Bench-scale testing of mixed-mode application of modified reagents are implemented with a view to enhancing efficiency of froth separation of diamond-bearing raw materials in a closed water circulation system. The test results ascertained efficiency of: new modified reagents on the basis of mazut types F5, F14, M40, F14+EMK, M40+OKS, M40-20 and M4020+OKS owing to the increased diamond recovery in the experimental froth separation concentrate by 5–17% as compared with the base recovery (58%); dispersant OP-4A in the reagent mode of the experimental froth separation, at the increased diamond recovery by 35–42% in case of all modified collecting reagents as compared with the base recovery (58%); antiscalants NTF-20 and Aqua-IS-3 in the reagent mode of the experimental froth separation owing to the increased diamond recovery by 12% as compared with the base recovery (58%). Using the obtained results, the recommendations are developed and approved for the pilot testing of the established reagent modes in froth separation at concentration plants of ALROSA.

Chut-Dy V. A., Dvoichenkova G. P., Babushkina A. L., Masanov A. Yu., Timofeev A. S. Bench-scale testing of mixed-mode application of modified reagents to enhance efficiency of froth separation of diamond-bearing raw materials in closed water circulation system. MIAB. Mining Inf. Anal. Bull. 2025;(11):112-125. [In Russ]. DOI: 10.25018/0236_ 1493_2025_11_0_112.

V.A. Chut-Dy¹, Leading Engineer, e-mail: chutdyva@alrosa.ru,
G.P. Dvoichenkova², Dr. Sci. (Eng.), Assistant Professor, Chief Researcher; Professor, Polytechnic Institute (branch) of the North-Eastern Federal University named after M.K. Ammosova, 678174, Mirny, Russia, e-mail: dvoigp@mail.ru, ORCID ID: 0000-0002-0940-3880,
A.L. Babushkina¹, Head of Sector, e-mail: babushkinaal@alrosa.ru,
A.Yu. Masanov, Task Leader to Innovation Adoption, Center for Innovation and Technology, AK ALROSA (PJSC), Moscow, Russia, e-mail: MasanovAYu@alrosa.ru,
A.S. Timofeev², Cand. Sci. (Eng.), Senior Researcher, e-mail: Timofeev_ac@mail.ru, ORCID ID: 0000-0002-3382-6007,
¹ Research and Design Institute of the Diamond Mining Industry «Yakutniproalmaz», AK ALROSA (PJSC), 678175, Mirny, Russia,
² Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, 111020, Moscow, Russia.

G.P. Dvoichenkova, e-mail: dvoigp@mail.ru.

1. Zlobin M. N. Sostoyanie i nekotorye puti razvitiya tekhnologii obogashcheniya almazosoderzhashchikh rud na predpriyatiyakh AK «ALROSA» [Status and some development paths of diamondbearing ore beneficiation technology at ALROSA enterprises], Moscow, Almazy, 2002, pp. 59—63.

2. Goryachev B. E. Tekhnologiya almazosoderzhashchikh rud [Technology of diamond-bearing ores], Moscow, MISIS, 2010, 326 p.

3. Zinchuk N. N., Koptil V. I. Comparative features of diamonds from primary sources of territories with a high density of kimberlite bodies. Proceedings of Higher Educational Establishments: Geology and Exploration. 2023, vol. 65, no. 1, pp. 28—42. [In Russ]. DOI: 10.32454/0016-7762-2023-65-1-28-42.

4. Zlobin M. N. Coarse-grain flotation technology for beneficiation of diamond-bearing ores. Gornyi Zhurnal. 2011, no. 1, pp. 87—89. [In Russ].

5. Kovalenko E. G. Improving the scheme and mode of internal water circulation for foam separation of diamond-bearing kimberlites. Transbaikal state university journal. 2024, vol. 30, no. 2, pp. 62—71. [In Russ].

6. Ostrovskaya L. Yu., Pashinin A. S., Ralchenko V. G., Boynovich L. B., Ashkinazi E. E., Bolshakov A. P. Wetting of low-index diamond facets: dynamic measurements. Russian Journal of Physical Chemistry. 2014, vol. 88, no. 5, pp. 822—829. [In Russ]. DOI: 10.7868/S0044453714050252.

7. Chanturia V. A., Dvoichenkova G. P., Trofimova E. A., Chaadaev A. S., Zyryanov I. V., Ostrovskaya G. Kh. Modern methods of intensification of beneficiation processes and finishing of diamondcontaining raw materials of class — 5 mm. Gornyi Zhurnal. 2011, no. 1, pp. 71—74. [In Russ].

8. Chanturia V. A., Dvoichenkova G. P., Chanturia E. L., Timofeev A. S. Intensification of separation processes of difficult-to-dress diamond-containing raw materials of primary, placer and technogenic deposits. Journal of Mining Sciences. 2022, no. 5, pp. 95—108. [In Russ].

9. Kovalenko E. G. Improving the scheme and mode of internal water circulation for foam separation of diamond-bearing kimberlites. Transbaikal state university journal. 2024, vol. 30, no. 2, pp. 62—71. [In Russ]. DOI: 10.21209/2227-9245-2024-30-2-62-71.

10. Makhrachev A. F. Improving the efficiency of reagents-collectors for diamond flotation based on vibratory jet magnetic activation. Nauchnye osnovy i praktika pererabotki rud i tekhnogennogo syr'ya. Materialy XXIII Mezhdunarodnoy nauchno-tekhnicheskoy konferentsii, provodimoy v ramkakh XVI Ural'skoy gornopromyshlennoy dekady [Scientific foundations and practice of processing ores and technogenic raw materials. Proceedings of the XXIII International Scientific and Technical Conference held within the framework of the XVI Ural Mining Decade], 2018, pp. 122—125. [In Russ].

11. Verkhoturova V. A., Elshin I. V., Nemarov A. A. Scientific substantiation and selection of the optimal option for restoring the hydrophobic properties of the surface of diamonds from the ore of the «Internatsionalnaya» pipe. Proceedings of Irkutsk State Technical University. 2014, no. 8, pp. 51—56. [In Russ].

12. Morozov V. V., Kovalenko E. G., Dvoichenkova G. P., Pestryak I. V., Lezova S. P. Modern directions for improving the efficiency of foam separation of diamond-bearing kimberlites. Mining Science and Technology (Russia). 2024, vol. 9, no. 2, pp. 134—145. [In Russ].

13. Smolnikov V. A., Bychkova G. M., Spetsius Z. V. Promising methods for increasing the floatability of diamonds. Gornyi Zhurnal. 1999, no. 5, pp. 33—36. [In Russ].

14. Kondratiev S. A., Semyonova D. V. Relationship between the structure of the hydrocarbon radical of the flotation reagent and its collecting properties. Journal of Mining Sciences. 2018, no. 6, pp. 161—172. [In Russ].

15. Pestryak I. V., Lezova S. P. Selection and justification of the composition of the collector for the process of foam separation of diamond-containing raw materials. Nauchnye osnovy i praktika pererabotki rud i tekhnogennogo syr'ya. Materialy XXVIII Mezhdunarodnoy nauchno-tekhnicheskoy konferentsii, provodimoy v ramkakh XXI Ural'skoy gornopromyshlennoy dekady [Scientific foundations and practice of processing ores and technogenic raw materials. Proceedings of the XXVIII International Scientific and Technical Conference, held within the framework of the XXI Ural Mining Decade], Ekaterinburg, 2023, pp. 46—50. [In Russ].

16. Chernousenko E. V., Neradovsky Yu. N., Kameneva Yu. S., Vishnyakova I. N., Mitrofanova G. V. Improving the efficiency of flotation beneficiation of refractory sulfide copper-nickel ores of the Pechenga ore field. Journal of Mining Sciences. 2018, no. 6, pp. 173—179. [In Russ].

17. Chun-chen Nie, Xi-guang Li, Wen-tao Zhou, Haipei Dong, Xiang-nan Zhu Innovative separation strategies for low-rank coal flotation: Filling self-generated pores with gutter oil collectors to enhance hydrophobic sites. Advanced Powder Technology. 2025, vol. 36, no. 6, article 104908. DOI: 10.1016/j.apt.2025.104908.

18. Dongtao Tang, Lingyun Fei, Shuai Wang, Hong Zhong, Xin Ma, Zhanfang Cao The selective adsorption mechanism of an amino acid surfactant in the flotation separation of fluorite from calcite. Chemical Engineering Science. 2025, vol. 311, article 121617. DOI: 10.1016/j.ces.2025.121617.

19. Zhenchao Ma, Zhe Li, Yingying Wang, Mengdi Xu, Ying Zhou, Xuesong Yang, Lei Wang, Yaowen Xing, Bobo Zhou, Xiahui Gui Synergistic collaboration of stirred mill and saline water to improve flotation decarburization efficiency of coal gasification fly ash. Minerals Engineering. 2025, vol. 229, article 109398. DOI: 10.1016/j.mineng.2025.109398.

20. Lijun Liu, Gan Cheng, Wei Yu, Chao Yang Flotation collector preparation and evaluation of oil shale. Oil Shale. 2018, vol. 35, no. 3, pp. 242—251.