Abstract
The performance of a rotating fixed bed reactor in recovering copper from industrial waste solutions by cementation is studied under various conditions. The rotating fixed bed is made of stacked woven steel screens to take advantage of two features of screens: the ability to present large area per unit volume and their ability to promote high turbulence. Variables studied are initial CuSO4 concentration, bed rotation speed, mesh number of the screens and bed thickness. The presence of baffles was found to increase the rate of cementation. The data were correlated by a dimensionless mass transfer correlation suitable for the design and operation of large scale cementation reactors.
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Abbreviations
- A:
-
Screen bed Area,m2
- а,a1 :
-
Constant
- Co :
-
Initial reactant concentration, mol cm−3
- C:
-
Concentration at any time (t), mol cm−3
- D:
-
Diffusivity, cm2 s−1
- dw :
-
Wire diameter of the cylinder,cm
- d:
-
Screen diameter, cm
- h:
-
Bed height, cm
- k:
-
Mass transfer coefficient, m s−1
- N:
-
Rotation Speed, rad/s
- ΔP:
-
Pressure drop
- Q:
-
Solution volume, cm3
- r:
-
Screen radius,cm
- t:
-
Time, min
- V:
-
Linear speed of the rotating screen (V = ωr)
- Re:
-
Reynolds Number \( \left(\frac{\uprho\ \mathrm{N}\ {\mathrm{d}}^2}{\upmu .}\right) \)
- Res :
-
Surface renewal model Reynolds number \( \left(\frac{\uprho\ \mathrm{N}\ {\mathrm{r}}^2}{\upmu}\right) \)
- Sc:
-
Schmidt number \( \left(\frac{\upmu\ }{\uprho\ \mathrm{D}}\right) \)
- Sh:
-
Sherwood number \( \left(\frac{\mathrm{k}\ \mathrm{d}\ }{\mathrm{D}}\right) \)
- Res :
-
Surface renewal model Sherwood number \( \left(\frac{\mathrm{k}\ \mathrm{r}\ }{\mathrm{D}}\right) \)
- ε :
-
\Specific energy dissipation, cm2 s −3
- μ :
-
Solution viscosity, g cm−1 s−1
- ν :
-
Kinematic viscosity, cm2 s −1
- ρ :
-
Solution density, g cm−3
- ω :
-
Rotation speed, rpm \( \left(\upomega =\frac{2\uppi \mathrm{N}}{60}\right) \)
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Abdel-Aziz, E.G., El-Naggar, M.A., Nosier, S.A. et al. Recovery of Copper from Industrial Waste Solutions by Cementation Using a Rotating Fixed Bed of Stacked Steel Screens. Mining, Metallurgy & Exploration 37, 453–458 (2020). https://doi.org/10.1007/s42461-020-00191-z
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DOI: https://doi.org/10.1007/s42461-020-00191-z