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ArticleName Study of the potential use of tailings from Severalmaz JSC for the production of mineral additives to cement binders
DOI 10.17580/or.2024.03.07
ArticleAuthor Aizenshtadt A. M., Morozova M. V., Frolova M. A., Tyurin A. M.

Northern (Arctic) Federal University named after M. V. Lomonosov (Arkhangelsk, Russia)

Ayzenshtadt A. M., Head of Chair, Doctor of Chemical Sciences, Professor,
Morozova M. V., Associate Professor, Candidate of Engineering Sciences, Associate Professor,
Frolova M. A., Associate Professor, Candidate of Chemical Sciences, Associate Professor,


Severalmaz JSC (Arkhangelsk, Russia)
Tyurin A. M., Head of Department, Candidate of Engineering Sciences,


During diamond mining at the M. V. Lomonosov deposit by Severalmaz JSC, the processing of kimberlite ores generates a sandy-clay material containing 60–65 wt.% saponite in a hydrated state. This material is directed to a tailings storage facility as a sedimentationstable aqueous suspension with a concentration of suspended solids up to 250 g/l. The company has developed and implemented a pilot plant to clarify the recycled water and extract the saponite-containing solid phase. This plant uses a technology that involves adding a reagent to produce water of the required quality and separating the sediment (cake) as a large-tonnage waste. The goal of this work was to obtain a mineral saponite -containing powder (MSP) from the cake and to assess its potential use as an additive in binding compounds (BC). The mineral powder was obtained through a two-stage mechanical activation process involving a hammer crusher and a ball mill. Differential thermal analysis of the samples showed that during mechanical activation, some of the saponite is transformed into serpentine, which accounts for the MSP’s activity as a BC component. A mechanism for this process is suggested. It has been found that saponite has the ability to optimize the water-cement ratio during concrete compound hardening. Control and experimental samples of fine-grained concrete (with the addition of MSP) were prepared. A comparison of their performance characteristics showed a strength of 28.94 MPa for the control samples and 44.28 MPa for the experimental samples. The frost resistance grades were F100 and F150, and the water resistance grades were W6 and W8, respectively. Additionally, the cement component consumption was reduced by 20 %. A flowchart of an MSP production line is proposed.

This research was supported by the project «Creation of a High-Tech System for Preparing Recycled Water at the Processing Plant of Severalmaz JSC with the Processing of Waste into Marketable Products» (under Decree No. 218 of the Government of the Russian Federation), agreement No. 075-11-2023-013 of February 15, 2023.

keywords Mining and processing waste, saponite-containing sediment, pozzolanic activity, serpentine, mineral saponite-containing powder, additive, fine-grained concrete

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