Characteristics of red mud slurry flow in carbonation reactor

Ruibing Li, Ting'an Zhang, Yan Liu, Jianpeng Zhou, Ruiping Zou, Shibo Kuang

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22 Citations (Scopus)

Abstract

A new calcification–carbonation method was developed for treating bauxite residue (red mud), and a novel Venturi carbonation reactor (jet–flow reactor) was designed and used to process the bauxite residue. The characteristics of the fluid of gas–liquid and red mud slurry–gas–liquid phases in the jet flow reactor were investigated, mainly the effects of superficial gas and liquid velocities and the effective height–to–diameter ratio (H/D) of the reactor for gas holdup, mixing time, bubble refining, and CO2 absorption. The results show that the maximum CO2 utilization rate (η) was achieved, i.e., η = 83.3% when the H/D value of the reactor was 4 and superficial gas and liquid velocities were 10.62 m·s− 1 and 0.89 m·s− 1, respectively. The results provide a theoretical basis for the optimization of a new type of jet flow reactor.

Original languageEnglish
Pages (from-to)66-76
Number of pages11
JournalPowder Technology
Volume311
DOIs
Publication statusPublished - 15 Apr 2017

Keywords

  • Gas holdup
  • Mass transfer coefficient
  • Mixing time
  • Sauter diameter
  • Venturi reactor

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