Determination of optimum mixture ratios of paste backfill materials for disposal of mineral processing tailings

A. Bascetin, S. Tuylu, D. Adiguzel, O. Özdemir, U. Cinar

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Özet

In recent years, use of mineral processing tailings as a paste backfill has been significantly increased due to the environmental problems occurred during the disposal of the tailings in mine area. The paste material used to fill the stopes excavated is generally consisted of tailings (solid ratio: 70-85%) and cement (3-7%w/w). Meanwhile, the strength of the paste material is completely related to ratios of these materials. Cemented Paste Backfill (CPB) system is used as support depending on the roof pressure and also as an underground disposal method. Therefore, temporary strength value of the paste material gains a great importance. For example, the paste backfill material must compensate the minimum 4 MPa strength value in order to procure the permanent fortification, and the mixture cost must be minimal as well. For this reason, in this study, the Pb-Zn tailings were used to prepare for the paste backfill material using cement in order to perform the uniaxial compressive strength (UCS) tests. Additionally, a statistical experimental design and linear programming techniques was used to find the optimum mixture in terms of strength and cost. The pulp solid ratios (PSR) of the tailings and cement (by the solid) were varied as 75-85% and 3-8%, respectively. The results of this study; the optimum mixture is -79.5%PSR and 6.8% cement ratio (by the solid) for 4 MPa UCS (28 day) and 16-17 cm slump value determined by this method with statistically reviewed experimental data.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığı2016 SME Annual Conference and Expo
Ana bilgisayar yayını alt yazısıThe Future for Mining in a Data-Driven World
YayınlayanSociety for Mining, Metallurgy and Exploration
Sayfalar292-295
Sayfa sayısı4
ISBN (Elektronik)9781510825659
Yayın durumuYayınlandı - 2016
Harici olarak yayınlandıEvet
Etkinlik2016 SME Annual Conference and Expo: The Future for Mining in a Data-Driven World - Phoenix, United States
Süre: 21 Şub 201624 Şub 2016

Yayın serisi

Adı2016 SME Annual Conference and Expo: The Future for Mining in a Data-Driven World

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???event.eventtypes.event.conference???2016 SME Annual Conference and Expo: The Future for Mining in a Data-Driven World
Ülke/BölgeUnited States
ŞehirPhoenix
Periyot21/02/1624/02/16

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