Latest revision as of 13:02, 12 February 2021

Abstract

Paste-like tailings slurry (PTLS) is always simplified as a Bingham plastic fluid, leading to excessive computational errors in the calculation of the hydraulic gradient. In the case of paste-like tailings in long-distance pipeline transportation, to explore a high-precision and reliable hydraulic gradient formula, the rheological behavior of paste-like tailings slurry was analyzed, a time-varying hydraulic gradient model was constructed, and a series of laboratory shear tests were conducted. The results indicate that the PTLS shows noticeable shear-thinning characteristics in constant shear tests; the calculated hydraulic gradient declined by about 56%, from 4.44 MPa·km<jats:sup>−1</jats:sup> to 1.95 MPa·km<jats:sup>−1</jats:sup> within 253 s, and remained constant for the next four hours during the pipeline transportation. Comparing with the balance hydraulic gradient obtained in a semi-industrial loop test, the computational errors of those calculated by using the time-varying hydraulic gradient model, Jinchuan formula, and Shanxi formula are 15%, 78%, and 130%, respectively. Therefore, our model is a feasible and high-precision solution for the calculation of the hydraulic gradient of paste-like tailings in long-distance pipeline transportation.

Document type: Article

Full document

Original document

The different versions of the original document can be found in:

• http://downloads.hindawi.com/journals/amse/2017/5276431.pdf under the license https://creativecommons.org/licenses/by

• http://dx.doi.org/10.1155/2017/5276431 under the license cc-by

• http://downloads.hindawi.com/journals/amse/2017/5276431.pdf,

http://downloads.hindawi.com/journals/amse/2017/5276431.xml,

http://dx.doi.org/10.1155/2017/5276431

• http://downloads.hindawi.com/journals/amse/2017/5276431.pdf,

https://www.hindawi.com/journals/amse/2017/5276431,

https://www.hindawi.com/journals/amse/2017/5276431/ref,

https://core.ac.uk/display/87803002,

https://academic.microsoft.com/#/detail/2747944810 under the license http://creativecommons.org/licenses/by/4.0/

• http://dx.doi.org/10.1155/2017/5276431,

https://doaj.org/toc/1687-8434,

https://doaj.org/toc/1687-8442