The principle flow of mercury amalgamation
1.Automatic
continuous feeding, unlimited length, improve production efficiency and reduce
production costs.
2.It adopts
numerical control, running information and status feedback in time, and the
operation is simple.
3.The use of
numerical control program adjustment ensures the machining accuracy of the
workpiece.
4.Hydraulic
clamping of the material, smooth operation, to ensure the processing accuracy
of the workpiece.
5.The device is
simple and convenient to operate, safe and reliable in performance, and high in
production efficiency.
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Mixture of gold mercury method is a simple and ancient method. It is based on the principle that gold particles are easily wetted by mercury, and mercury is then diffused into the gold particles to form gold amalgam (including amalgam). The amalgamation reaction can be expressed by the following formula:
Au+2Hg=AuHg 2
The composition of gold amalgam (paste) varies with its gold content. When the mercury is mixed, the surface of the gold particles is first wetted by mercury, and then the mercury diffuses into the interior of the gold particles to form AuHg 2 , AuHg and Au 3 Hg , respectively, and finally forms the solid solution Au 3 Hg of gold in the mercury. When the amalgam is heated to above 375 °C, the mercury volatilizes in the form of elemental mercury, and the gold exists in the form of sponge gold.
Mercury amalgamation is generally not an independent process, and often forms a joint process with other methods of selection. In most cases, amalgamation is only an aid to gold recovery. Due to the poor working conditions of mercury, the labor intensity is high, it is easy to cause mercury poisoning, and the waste water containing mercury should be cleaned. It is gradually being replaced by flotation or re-election. However, the amalgamation method can recover the natural gold of the monomer, which can be used as a real estate gold, so it still occupies a certain position in the gold beneficiation . The principle flow of amalgamation and gold extraction is shown in the figure below.