A simple framework for developing a concept beneficiation flow sheet
J Rabe
Tasked with developing a flow sheet for a new resource, one typically turns
the experts for help. The advice of an expert can be invaluable in reducing
the time and costs associated with characterizing an ore (not to mention
extracting maximum information from limited samples). While guiding and
optimizing a metallurgical concept study requires a certain skill set, selling
a project is something different.
The metallurgical specialist is usually not responsible for sharing the
results of investigations with potential investors. However, the person
responsible for selling the project can ensure that a metallurgical concept
study is conducted thoroughly and responsibly without having the ability
to do the work, while being sufficiently familiar with the metallurgical
aspects to authoritatively sell the project.
The process of identifying suitable process routes through to
constructing a concept flow sheet and mass balance is discussed as a basic
example.
From basic mineralogical information and a thorough literature survey,
the most likely beneficiation routes can be identified and targeted testing
conducted. The final top size will depend on the required product properties
(mainly grade), the selected beneficiation technology, and the ore’s
liberation properties.
Once the required top size has been identified, comminution options
can be evaluated. Once again, literature surveys can be used to supplement
concept-level comminution property information, and select possible
equipment and circuit configurations.
Marketing, material handling, and logistics-related information can be
used to determine required dewatering technologies. At this stage, enough
information is available to develop a concept mass balance and conduct
basic equipment sizing.
Keywords: comminution, ore beneficiation, characterization, titanomagnetite.
Conceptual flowsheet