SLUICE FOR EXTRACTING LAMINAR GOLD Russian patent published in 1999 - IPC

FIELD: gravitational concentration of minerals, such as fine-grained or coarse-grained sands and ores containing laminar gold. SUBSTANCE: sluice has rectilinear inclined troughs with stencils and laminar gold extraction trough disposed at an angle to first rectilinear trough. Gold extraction trough has two small narrowing troughs arranged in symmetry and connected through rectilinear portion. Narrowing troughs have variable height reducing toward center. Gold extraction trough has first-level section with gate and second-level section. First-level walls have slot. Construction of sluice allows laminar and fine-grained gold to be effectively extracted during processing of hard-to-concentrate sands and ores. EFFECT: increased efficiency and enhanced reliability in operation. 6 dwg