WASHING INSTALLATION Russian patent published in 1998 - IPC

FIELD: mineral dressing. SUBSTANCE: invention relates to low-scale dressing installations serving to recover gold from gravel deposits. Installation comprises shaker mounted on frame and provided with gravel-disintegration device and gravel- concentration apparatus in the form of deep-filling strake and is distinguished by being also provided with opening sieve to separate gravel into fine and middle fractions, which is placed under shaker in the form of false bottom; second deep-filling strake arranged along shaker symmetrically to the first one; gravel middle fraction dewaterer placed under strakes; and fine-fraction gravel- concentration apparatus installed behind dewaterer. Invention is further distinguished by that, opening sieve of shaker is connected with strakes through middle-fraction gravel-supply means and, through fine-fraction gravel drain means, with dewaterer, which communicates, through water-drain means, with strakes and, through fine-fraction gravel discharge means, with fine-fraction gravel concentration apparatus. EFFECT: increased gold recovery degree due to reduced loss of fine-class gravel. 2 dwg