NEW -IAO50BR 12 kg per day Aqua Regia Refining System
PRECIOUS METAL ASSAY LABORATORY
Introduction to Assaying
The assaying process is a necessary step to determine the quantity of precious metals present in an alloy.
Cupellation is one operation of the assay process in which a sample of gold, wrapped in lead foil, is melted
in a special crucible known as a cupel: this cupel has the capacity of absorbing the non-precious metals
contained in the gold alloy. The weight of the gold alloy sample is usually about 250/1000.
Although this is the most ancient method to determine the purity of an alloy, assaying by means of
cupellation gives greater precision than more modern methods (fluorescent or x-ray spectrophotometry)
and is considerably less expensive.
Weight range : from 0 to 82 gr ( indicates up to five decimal figures )
Weight range : from 0 to 220 gr ( indicates up to 4 decimal figures
BENCH DRILL TYPE TRB/A
Max. capacity to drill : 10 mm
Speeds : n°4
Spindle speeds : 450/rpm
Ground base dimensions : 230×270 mm
ANTI-VIBRATING TABLE TYPE TAV/A.
Overall dimensions : 890x710x800 mm
Weight : 76 Kg
CUPELLATION FURNACE TYPE FCOPP/A
Max. working temperature : 1350°C
Silicon carbide muffle : 155x205x80 mm
Number of cupels : n°12 diam 25 mm
Resistances : ceramic
Power : 8.5 Kw
Dimensions : 830x950x1850 mm
Spares & Consumables
1/L2NrSILICON CARBIDE MUFFLE FOR FCOPP/A L=210€ 146,60€ 293,20
CERAMIC RESISTANCES FOR FCOPP/A
SERIES OF ALUMINUM BRAIDS FOR FCOPP/A
RESISTANCE TERMINALS FOR FCOPP/A
CUPELS N. 1 (22X19)
CUPELS N°2 (26X22)
PINCERS TO REMOVE CUPELS
LONG KEVLAR GLOVES
MACHINE FOR THE TREATMENT OF CUPEL BALLS TYPE MSLR/B
Power supply : three phase
Total power : 1.5 Kw
Water consumption : 1-2 lt/1’
Dimensions : 750x450x1300 Kg
Weight : 120 Kg
SEPARATION HOOD TYPE CS/B
Number of 6 place ovens : n°2
Power : 4 Kw
Dimensions : 1150x650x1820 mm
Weight : 90 Kg
Spares & Consumables
BEAKERS FOR FS6/A OVENS
NEUTRALIZATION TOWER FOR ACID FUMES TYPE TLF/500
Power : 0.25 Kw
Overall dimensions : 653x700x2165
Weight : 65 Kg
Spares & Consumables
15/L10NRCRUCIBLE 33X33€ 7,00€ 70,00
ASSAY CARRYING TRAY
HORSE HAIR BRUSH FOR CUPEL DIAM. 10 MM
GLASS CONTAINER FOR NITRIC ACID
GRADUATED CYLINDER 100 CC
GRADUATED CYLINDER 250 CC
CUPEL TRAY TO DRY ASSAYS
MEDIUM FREQUENCY INDUCTION MELTING FURNACE
The furnace is ideal to melt precious metals. All ITALIMPIANTI ORAFI induction melting furnaces are
fitted with static frequency converters.
A high efficiency of the electrical output that drastically reduces electricity consumption, maintaining the
production rate, is obtained by the frequency conversion system used.
The modular construction of the electric circuit board greatly simplifies maintenance operations and
guarantees high reliability even in the most demanding working conditions.
The highest technical standards used to design the inductors along with the modular construction and the
use of only high quality materials guarantee maximum production even in the worst conditions.
Rapid interchangeability of the crucible
Protection of the metal while melting by an inert gas
Manual extraction of the crucible using the appropriate pincers
Automatic temperature control of the metal
Absorbed power : 12 kW
Power output : 11.4 kW
Required quantity of the cooling water : 20 lt/min
Capacity of the crucible : 17 Kg of Au
Melting time : 15 minutes
Dimensions : 485x510x915 mm (L x W x H)
Weight : Approx. 216 Kg
Technical data of the converter
Power output : 15 kW
Working frequency : 5 Khz
Power-supply tension : threephase
Power factor (cosF-i) : 0.9
Required cooling power (generator/furnace) : 6,500 Kcal/h
Minimum water cooling capacity : 15 lt/min
Min pressure for the cooling water pump : 3 Bars
Cooling water inlet temperature : 30° + 35°C
⇒Display monitoring of the working parameters of converter as tension and absorbed power
⇒ Computerised alarm diagnostics to sensor as many as 12 alarms or warnings which the worker must take
note of for the system to work properly. Instructions and advice are shown on the display.
⇒ Closed ring power regulation which allows the system to absorb the set power regardless of the quantity
and type of metal to melt.
⇒ Three phase power-supply transformer :
Nominal tension : depends on where the machines
Allowed fluctuation of the electrical mains : +/- 10%
⇒ Pulse stirring function for special alloys
GRAPHITE CRUCIBLE – 8 KG AU
Water chilling unit model FRIGO/20
These chilling units are ideal for all cases where it is important to keep the temperature of the cooling water
within certain limits. Suggested uses are with :
Water cooled induction melting furnaces
Trichloroethylene degreasing machines
Brazing belt furnaces
Fumes condensors for hollowing and refining plants
Frig/h : 8170
REFINING TUMBLER UNIT
This refining system consists of a hollow PPL tumbler with a total volume of about 100 litres and a useful
capacity of about 50 litres (acids plus gold grains). The tumbler is inclined at 25° and continuously rotates by
means of a special motor. The rotation speed can be regulated.
The continual rotation causes the gold grains to rub against each other and consequently the dissolution time is
External to the tumbler there is a Pyrex-glass fume condenser with water circulatting inside.
Another advantage is that this unit can work without supervision.
The maximum daily quantity you can refine every day is of 12 kg (6 kg per cycle) of gold grains getting a
final gold purity of 999,5/1000 (minimum).
It is a multi-purpose unit allowing the user to refine the gold grains as well as casting scraps and some
types of precious ashes.
The plant is mainly made up of :
Polypropylene hood designed to the recover any acid losses
PPL tumbler with a useful capacity of about 100 litres
No. 2 Graduated tanks for HCl and HNO3.
No. 1 PPl tray where two 100 lt containers for HCl and HNO3 acids are stored.
No. 2 Filter units on wheels with a compressed air diaphragm pump to transfer the solutions. One
450 mm high, the second 750 mm.
No. 1 100 lt cementation unit.
No. 1 Control panel
Technical Data :
Power supply : Single – phase.
Power : 0,8 Kw
Overall dimensions : 2600 x 1200 x 2500 mm. ( Length – Width – Height).
Weight : 375 Kgs
REDOX – PH KIT
FILTER PAPER DIAM. 400MM
NEUTRALIZATION TOWER FOR FUMES
The tower is used to neutralize fumes and remove organic substances. It is
built out of polypropylene sheets. A sprayer is installed inside the tower to
spray a 1300 mm thick layer of raschig rings.
In order to avoid drop dragging, a second 310 mm thick layer of raschig
rings has been placed upstream to the sprayer.
A neutralization solution container is placed beneath the tower. The
solution circulation pump has a capacity of 55 Lts/1′ with a head of 6 m.
The suction fan has a max capacity of 2000 m3/hour.
Power supply : three-phase.
Power : 3 kW
Overall dimensions : 1500x1200x3500 mm (length-width-height).
Working weight : 350 kg
Water treatment Dept.
RESIN RECOVERY SYSTEM TO RECOVER
TRACE PRECIOUS METALS
Pretreatment storage tank
This is tank where the waste waters are initially sent before the resin treatment process is started.
It has a 2000 lt capacity and is connected to the resin unit.
Fitted with :
n.1 Pneumatic valve, PVC/EPDM, NC DN32-028
n.2 Ball valves, PVC/EPDM, 546- DN32
n.1 Pneumatic level regulator, PVC/EPDM, with flange DN100
n.1 Centrifugal pump, threephase, 1.1 kW, PVDF, with PP base
n.1 Valve 546-DN40
n.1 PVC flowmeter, 1000 lt/hour
n.1 Pressure gauge, 2.5 Bar, with trap
n.1 Non-return valve, PVC/EPDM, DN15
n.1 Pneumatic valve, PVC/EPDM, NC DN15-028
n.1 Valve 546-DN15
The unit contains a series of selective resins to recover precious PGM and Au metals from the incoming
Non precious metals ( Cu, Zn etc) pass through to the pre-treatment storage tank with the waste solution
before proceeding to the neutralisation tank.
This unit can filter up to 400 lt per hour.
Fitted with :
Post treatment PE storage tank, 2000 Lt capacity, with containment tank.
Fitted with :
n.1 Pneumatic pump, PP body with flow rate regulator
n.1 Valve 546-DN25
n.1 Non-return valve 303 DN25
n.1 Pneumatic level control
ACID WATERS NEUTRALISATION PLANT
DESCRIPTION OF THE IN/A UNIT
This plant can be used to treat all types of acid water but in particular the solutions coming from the
refining process as well as precipitating all non-precious metals in the form of hydroxides. This plant
which consists of :
⇒ n°1 500 lt capacity tank complete with :
Agitator to stir the incoming solution
n°1 Filter press type 320/50
The filter press is used to filter water and slime in order to recover precious metals. The press is fitted
with a 700 lt pneumatic pump. The components of the filter press, from the smallest to the largest, are
single-block structures that are electrically welded, machined and carefully inspected; the design has
allowed very low stress levels, even under maximum operating pressure.
The heads and longitudinal bars are plated with stainless steel or other metals depending on the
chemical properties of the solutions to be filtered.
The cloths, the shape and the dimensions of the plates, as well as the materials used inside the filter
elements, constitute the most important part of a filter press. The choice of these elements is the result
of years of experience on the part of those who are familiar with these problems.
The pump is provided with an electronic level control probe for the automatic starting and stopping of
The solutions exiting the filter press contain chlorides, nitrates and sodium sulphates that can be
concentrated or diluted with other waste waters.
Power supply : three-phase
Power : 1 Kw
Plate dimensions : 320×320 mm
Number of plates : 50
Volume of slime contained : 100 lt
Overall dimensions : 2680x580x830 mm
Type of plate-locking system : mechanical
To properly quote a system(s), additionally, we need to know:
Chemical composition of the material to be refined would be ideal.
Initial form of the material as in old jewelry, fluvial dust, gold scraps, etc.
Starting purity, including quantity of Au and Ag.
Required final purity of the material (IE 999,5)
Required final form you require(IE Ingots, Grain etc.). If you require Ingots, kindly specify the weight ( 1 Kg, 2 Kg, 500 Gr, Etc).
Average silver content must not exceed 15-18 %
This is a standard setup (equipment can/will change according to specific requirements)
This information is intended only as a guideline to those who want to have an approx. idea at investment levels for such a project with these daily quantities.
Some refining situations may not require all the listed equipment, others will require additional units, which is why more technical infformation is required (i.e. materials, purities etc.) before issuing a formal quote.
This webpage should not be considered a fomal quote.