| 摘要 |
An apparatus for and method of recovering silver from liquid solution containing silver, the apparatus comprising an ionic exchange chamber wherein a sludge containing silver is precipitated from the solution, the apparatus further comprising a device to measure the flow of solution through the chamber and to obtain a representative sample from the solution displaced therethrough. In accordance with one aspect of the invention, the metering and sampling are accomplished in a single unit. It is preferred that the metering and sampling unit be situated to receive solution prior to its entry into the precipitation chamber, although the effluent solution leaving the chamber may be metered and sampled as well. The metering and sampling device illustrated comprises a tilting tray pivotally disposed in a metering chamber. Upon each oscillation of the tray, a known amount of solution is thus caused to be discharged from the compartments of the tray. A mechanical counter is provided to record the number of oscillations of the tray, so that the total amount of solution flowing through the precipitation chamber over a period of time is known. Each time the tray oscillates, a small amount of fluid is caused to flow from the chute into a sampling chamber where a cumulative representative sample is collected.
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