The use of global sensitivity analysis for improving processes: Applications to mineral processing

Global sensitivity analysis for identifying critical process design decisions

“…For this reason, in this second stage, we apply a method of reducing the number of variables with uncertainty. Based on Sepúlveda et al (2014a), the Sobol' and Morris methods can identify input variables that most affect the uncertainty of the output variable, and therefore both methods can be applied. In this work the Sobol' method is used.…”

“…Finally, the variation of residence time and species feed to the flotation circuit was ±10%. Uniform distribution was considered in all input continuous variables as proposed by Sepúlveda et al (2014a) to study design problems. The arsenic grade in Table 1 -Maximum recovery and maximum flotation kinetic constants (min −1 ).…”

“…They conclude that the method of Sobol' delivers optimal results in the analysis of such circuits. Later, from the identification of the critical variables, the flotation circuits were improved (Sepúlveda et al, 2014a).…”

Feasibility Study Plant Design

“…Techniques such as Global Sensitivity Analysis (GSA) and technoeconomic simulation tools present options 3,4 for improving operations at the design stage (see also Chapter 9). 1 Substantial delays of several years and resultant lost productivity may arise from this issue.…”

Optimizing Flotation Circuit Recovery by Effective Stage Arrangements: A Case Study

“…The present study is going to compare and evaluate the configuration of flotation circuits, assuming that an identical recovery in stages is an acceptable assumption and the results are valid for non-identical stage recovery. Recently, the effect of stage recovery on the overall circuit recovery has been investigated from two aspects of sensitivity and uncertainty analyses [6,7,9,17,18]. These studies have shown that the flotation circuit configuration is not very sensitive to stage recovery [9,19].…”