Fig. 7.4 Energy consumption for each stage of the process in alluvial mining technology. (a)
Energy consumption for each stage of the process. (b) Energy loss for each stage of the process.
(Note: First law efficiency (Cullen and Allwood 2010; Pellegrino et al. 2004; Romero Rueda et al.
2012). Exploration (ŋ = 37%), stripping (ŋ = 90%), dredging line (ŋ = 90%), mechanical screening
(ŋ = 90%), hydraulic jigs (ŋ = 90%), sluice boxes (ŋ = 72%), services (ŋ = 78%), physical separation
(ŋ = 90%), filtration-separation (ŋ = 72%), chemical separation (ŋ = 72%), drying and separation
(ŋ = 90%), WTTP (ŋ = 72%), casting and molding (ŋ = 37%), tailings pond (ŋ = 72%). Energy
consumption is not specific)