Performance evaluation of a flighted rotary dryer for lateritic ore in concurrent configuration.

Autor: Vargas AR; Industrial Engineering Department, Universidad of Holguín, Cuba.; Empresa de Servicios Técnicos de Computación, Comunicaciones y Electrónica 'Rafael Fausto Orejón Forment', Holguín, Cuba., García LP; Chemical Engineering Department, University of Oriente, Santiago de Cuba, Cuba., Guillen CS; Centro de Investigaciones Del Níquel 'Alberto Fernández Monte de Oca', Holguín, Cuba., AlJaberi FY; Chemical Engineering Department, College of Engineering, Al-Muthanna University, Al-Muthanna, Iraq., Salman AD; Department of Chemical and Petroleum Refining Engineering, College of Oil and Gas Engineering, Basra University for Oil and Gas, Basra, Iraq., Alardhi SM; Nanotechnology and Advanced Material Research Center, University of Technology, Iraq., Le PC; The University of Danang-University of Science and Technology, Danang 550000, Viet Nam.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2023 Oct 30; Vol. 9 (11), pp. e21345. Date of Electronic Publication: 2023 Oct 30 (Print Publication: 2023).
DOI: 10.1016/j.heliyon.2023.e21345
Abstrakt: The lateritic ore drying in the Cuban nickel producing industry is realized within flighted rotary dryers. In this investigation, performance indicators in regards to transfer of momentum, heat and mass were evaluated. The dryers operate in a concurrent configuration with combustion gas, at a productivity between 40 t h -1 and 50 t h -1 . The distribution function of the residence time (RTD) was best fitted to a model of a multi-branch tanks-in-series system, theoretical residence time was 51 ± 2 min and experimental mean residence time 61 min, at a rate of 45 t h -1 and hydraulic efficiency 1.23, due to the presence of dead-zoon. Mass and energy balance was made following a "black box" model, as results, the specific fuel consumption was 27.25 ± 0.25 kg fuel t -1 of wet ore, specific energy consumption 79.66 ± 0.95 kg fuel t -1 of H 2 O evaporated, energy efficiency 97.28 ± 0.01 %, thermal efficiency 66.88 ± 0.71 % and drying efficiency 98.77 ± 0.12 %. Mathematical modelling was made using a system of differential equations, the rate of drying in falling rate period was estimated by Arrhenius equation, then, temperature profile and ore moisture content along the dryer was simulated. The model provided a successful predictive performance; for an inlet gas temperature between 850 °C and 900 °C, the ore moisture was reduced form 33.0 % (wet basis) to a range depending on the dryer productivity, from 3.0 % to 7.1 %. Designing a computerized system that implements these algorithms can benefit on efficiency and productivity of the production plant.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2023 The Authors. Published by Elsevier Ltd.)
Databáze: MEDLINE
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