Improvements in the Recovery of Tin and other Metals.

摘要

5256. Letcher, J. B. April 7. Endless-belt washing- apparatus.-Water containing tin or other metals mixed with sand is fed through a launder h1 and transverse trough i to an inclined upwardly-moving endless surface c formed of corduroy, the sand &c. being washed down to a trough o by a stream of water from a pipe j, while the values are carried up in the ridges and are washed into a trough m by a water supply k.