Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
17-72
Distillation Unit
17.17.4
The Distillation Unit was modeled using ChemCAD commercial software. ChemCAD
has its own proprietary database for non-ideal mixtures. Validation of the ChemCAD
predicted equilibrium composition was performed using the pilot plant data supplied
by SGS Lakefield Inc..
Waste Neutralization Unit
17.17.5
The Waste Neutralization Unit uses generic neutralization reactions using limestone
and quicklime. These reactions are well documented in the literature. Precipitation
efficiencies for all metal hydroxides and carbonates were assumed at 100% because
of their very low solubility. All alkali and alkali-earth metals are assumed non-reactive
and are crystallized as chlorides by vaporization of the filtrate solution. These
reactions are also well documented in the literature.
17.18 Output
The output of the Hydromet METSIM Model is a series of mass balances and
products, potential by-product and waste streams compositions and quantities that
were used to size the equipment and calculate the financial figures for the Hydromet
operation. A METSIM mass balance was run for each year of mine operation. A
summary of these mass balances is presented in Table 17.24.
