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Continuous leaching of uranium from an Indian ore: Residence time scale up and heat effects

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Title Continuous leaching of uranium from an Indian ore: Residence time scale up and heat effects
 
Creator RAO, KA
SREENIVAS, T
VINJAMUR, M
SURI, AK
 
Subject Continuous leaching
Uranium
Pyrite
Residence time distribution
Heat effects
OXIDATION
CHEMISTRY
CARBONATE
 
Description Commercial level operation of uranium leaching from the ores is carried out as a continuous process because of techno-economical benefits. Batch kinetic data of uranium leaching from a lean ore, is scaled to multiple continuous stirred tank reactors using the Residence Time Distribution (RTD) model. A graphical approach reported earlier was improved for better predictions of the observed experimental results. Batch data was obtained from a laboratory scale reactor. The scaling is used to predict the temperature rise in a continuous reactor, which happens mostly due to conversion of pyrites present in the ore. The scaling obtained with the modified model is compared with measurements of uranium conversions and reactor temperatures in a pilot scale continuous reactor having three stirred tanks in series. A good comparison is obtained for several different operating conditions of the pilot and commercial scale reactors. Hence, RTD is a good tool for scale-up and design of commercial scale leaching of uranium from lean ores. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T17:40:28Z
2014-12-28T17:40:28Z
2014
 
Type Article
 
Identifier HYDROMETALLURGY, 146119-127
0304-386X
1879-1158
http://dx.doi.org/10.1016/j.hydromet.2014.03.014
http://dspace.library.iitb.ac.in/jspui/handle/100/17013
 
Language English