STATIC GLASS REFINING PLANT

The aqua regia refining process is used to refine gold alloys using a combination of acids and chemical products. The aqua regia solution consists of a mixture of hydrochloric acid HCL and nitric acid HNO₃.

INFORMATION REQUEST

Introduction to Aqua Regia

The refining process can be broken down into several steps:

Analysis of the gold to be refined
Production of Au grains or thin strips
Refining process
Separation and recovery of the AgCl
Precipitation of the gold
Filter and rinsing of the gold powder
Analysis of the refined gold
Melting of the Au into final required form

Main advantages:

Very compact plant
Easy handling
Low operation costs
No harmful fumes
No gold losses
Automatic acid loading

Refining using Aqua Regia

Best suited for gold with an initial purity of at least 600/1000. Initial purities below this value can reduce the production capacity as well as increase process times.

Recommended maximum silver content: 10-12 %. Percentages above these values can reduce production capacity as well as increase process times.

The gold should be either melted into fine grains – using a melting furnace and a grain tank – or very thin strips.
Strips are ideal due to their large surface area and complete dissolution when emerged in the aqua regia solution.

Grains, due to their irregular shape and size, are more difficult to dissolve and often leave leftovers in the reactor. On the other hand, they are quicker to produce than strips.

Features:

Anti-acid polypropylene hood containing all the necessary equipment. Designed to recover acid losses
Electric heater with potentiometer
Pyrex reactor with fume condenser
Filter unit on wheels with a compressed air diaphragm pump to transfer the solutions
Gold cementation tank
Graduated tanks for HCl and HNO₃. Acid transfer from the reactors by vacuum.
PPl tray acid containers (HCl and HNO₃) are stored.
Compressed air diaphragm pumpto transfer the solutions
Polyethylene tanks, fitted onto a trolley to store king waters.
Metering pumps to transfer the acids into the reactors.
Condensers in pyrex glass.

The above system can be customized upon request of the customer, the photos submitted are just one example of the many possible system solutions.

Based on the needs of the customer is possible to create customized systems, with suitable characteristics for the process requirements.

TECHNICAL SPECS	IAO10	IAO20	IAO20-20	IAO50-10	IAO50-20	IAO50-50
Power supply	Single phase	Three phase	Three phase	Three phase	Three phase	Three phase
POWER	1 kW	2.5 kW	7 kW	5.3 kW	7 kW	8 kW
*Refining capacity (kg/9h)**	3 Kg	6 Kg	12 Kg	20 Kg	22 Kg	32 Kg
Dimensions (mm)	Length:1100 Depth:700 Height:2000	Length:1300 Depth:2400 Height:2545	Length:1300 Depth:2400 Height:2545	Length:1300 Depth:3450 Height:2550	Length:5000 Depth:3300 Height:2550	Length:5000 Depth:3300 Height:2550
Weight	85 Kg	290 Kg	550 Kg	450 Kg	500 Kg	500 Kg