Gold or Silver Elution and Electrowinning System

Working Principle 

Anions which are absorbed by activated carbon more easily are fed into solution for replacing Au (CN)2- out of surface of carbon to elute gold. Electrowinning recovers gold as sludge type from the pregnant solution produced by elution.

Features

High temperature, high pressure, cyanide-free and elution controlled automatically bring out the advantages of high efficiency, low consumption, and quick cycle.

High efficiency: the elution rate can be more than 96% while the grade of the gold loaded carbon reached 3000g/t, The grade of barren carbon can be reduced by 3-4 times than that of the conventional system.

Quick cycle: The working temperature of the system is 150℃so that elution is quick and the stripping duration is only 8-10 hours which is about one forth of that of the conventional system.

Low consumption: The elution Devices and electrowinning equipment compose a whole system. The temperature of every section of the whole system is same so that the heat exchanger is no need. The total power consumption is only 1/2-1/4 of  the value of the conventional system because heat energy is recycled fully.

Cyanide-free: No sodium cyanide is fed to prepare stripping solution to realize low costs and no pollution.

High grade of gold sludge, no reverse electrowinning, easy to collect gold sludge.

Automation: Special liquid level control unit, temperature control unit and automatic control center.

Safety: Triple safety protection devices, i.e., self intelligent system, automatic rated pressure release system and safety valves.

Long life: The material type of equipment, pipes, valves and instruments is stainless steel.

Application 

It is used to recover gold solid from gold loaded carbon coming from cyanide leaching.

Capacity 

Technical Parameters