Refining Plant With Static Glass

Principle of operation

The refining process can be summarized in several operations:

• Analysis of the alloy to be refined title
• Production of grit or fine gold foils
• Refining by aqua regia
• Separation and storage of silver chloride (AgCl)
• gold precipitation
• Recovery and filtering of the precipitated gold powder
• Analysis of the security of this gold
• Gold Fusion in its final form

Key benefits:

• Compact system
• Easy to transport and assemble
• Low purchase costs
• No harmful smoke released
• No loss of gold in the process
• Automatic loading of acids

Refining by aqua regia

The minimum recommended title for the gold alloys to be refined must be at least 600/1000.
Lower Titles significantly reduce productivity by increasing the processing time.
The percentage of silver present in the alloy should not exceed 10-12%. Higher values can reduce the productivity of the process as well as adding the times.

The gold will be melted and reduced to fine grit (through a melting furnace and a container for the production of grits) or small plates. These latter make it possible to maximize the effect of dissociation due to their high external surface when they are immersed in aqua regia solution.
The grit, due to a lower outer surface and more irregular shape, it needs a longer time for its complete dissociation, sometimes leaving residues in the reactor
is, however, easier to get gold in the form of grit.

The plant consists of:

• Bath PPL with panels, which accommodate the two containers for HCL and HNO3.
• Extractor in PPL with the intake manifold, to be connected to our tower suction and fumes neutralization, type TLF. The above is constructed so as to collect any leaks of acids.
• An electric heater with power regulator
• Reactor with condenser, pyrex glass.
• Transfer HCl and HNO ₃ as containers sized containers by means of vacuum.
• Polyethylene container, with lid and suction for AgCl decantation.
• Flask pyrex glass for the gold cementation, porcelain Buchner funnel and its lid for the transfer and filtration of solutions by means of vacuum.
• Antacid diaphragm pump, powered by compressed air, for the transfer of solutions.
• polyethylene containers for the containment of the mother liquors.
• Metering pumps for the transfer of HCL and HNO3 in the reactors.
• Pyrex glass capacitors.

The described plant can undergo customizations on the customer's request, photos posted are just one example of the many possible system solutions.
Based on the needs of the customer it is possible to create tailor-made systems, with suitable characteristics to the machining process required.