University of Oulu

Paiva, H., Simões, F., Maljaee, H. et al. Production of ceramic construction materials as an environmental management solution for sulfidic mine tailings. SN Appl. Sci. 3, 751 (2021).

Production of ceramic construction materials as an environmental management solution for sulfidic mine tailings

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Author: Paiva, H.1; Simões, F.2; Maljaee, H.2;
Organizations: 1Civil Engineering Dept, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
2Civil Engineering Dept, RISCO, University of Aveiro, 3810-193 Aveiro, Portugal
3Fibre and Particle Engineering Research Unit, Oulu University, P.O.Box 4300, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
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Language: English
Published: Springer Nature, 2021
Publish Date: 2021-08-17


Mine tailings (MT) waste valorization in construction materials can be one possible solution because they may allow an alternative for some applications as an important contribution for a more circular economy. The aim of this work was to study the feasibility of using a sulfidic mine tailing in the production of building materials such as ceramic roof tiles. The introduction of 5, 10 and 20% MT in ceramic roof tiles promoted an improvement on the final properties of these materials. The use of 20%MT has decreased the firing temperature from 1150º to 1050 ºC, hence promoting energy savings and lower costs. Properties as density and water absorption were improved. Firing shrinkage, many times responsible for cracking, also decrease with the use of MT and, in this way, improve the production rate. The 20% MT ceramic formulation achieved the highest value of strength with lowest firing temperature. For the effects of sulphates‘ emission (SO₂ and SO₃ gases) upon firing, a solution was proposed involving their reaction with water and, through condensation, providing afterwards sulphuric acid as a process by-product. The use of high sulphide MT in ceramic roof tiles processing could be viewed as a potential safe waste management solution for these particular mine tailings.

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Series: SN applied sciences
ISSN: 2523-3963
ISSN-E: 2523-3971
ISSN-L: 2523-3963
Volume: 3
Issue: 8
Article number: 751
DOI: 10.1007/s42452-021-04735-w
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This experimental work was carried out under the auspices of the GEOSULF ERA-MIN project, supported by the Finnish Funding Agency for Technology and Innovation (Tekes), Portuguese National Funding Agency for Science, Research and Technology (FCT) and the National Centre for Research and Development of Poland (NCBR), whom the authors wish to acknowledge. The authors wish also to acknowledge SOMINCOR for the supply of the mine tailings. The work was also supported by the Foundation for Science and Technology (FCT)—Aveiro Research Centre for Risks and Sustainability in Construction (RISCO), Universidade de Aveiro, Portugal [FCT/UIDB/ECI/04450/2020].
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