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The agglomeration kinetics of aluminum hydroxide in Bayer process

Bahrami, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.powtec.2012.03.018
  3. Publisher: 2012
  4. Abstract:
  5. The effects of temperature, seed mass and agitation rate on agglomeration kinetics of aluminum hydroxide in Bayer process have been studied in a batch system. Collected raw data were analyzed and the kinetics data of agglomeration were derived through simulation of the process using a pre-developed software. The results showed that agglomeration kinetics constant (agglomeration kernel) increases with increase in temperature and agitation rate. Moreover a maximum value of agglomeration rate versus added seed mass was observed. Furthermore the magnitude of calculated activation energy of agglomeration was close to that of growth
  6. Keywords:
  7. Agglomeration kernel ; Agglomeration rate ; Agitation rates ; Batch systems ; Effects of temperature ; Maximum values ; Seed mass ; Activation energy ; Computer software ; Hydrated alumina ; Kinetics ; Agglomeration ; Aluminum hydroxide ; Agglomeration kinetics ; Batch process ; Bayer process ; Chemical reaction kinetics ; Concentration (parameters) ; Inhibition kinetics ; kernel method ; Mass action ; Mathematical computing ; Mathematical model ; Particle size ; Precipitation ; Process model ; Temperature measurement ; Temperature sensitivity
  8. Source: Powder Technology ; Volume 224 , July , 2012 , Pages 351-355 ; 00325910 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0032591012001830