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.
Laboratory lay-out
| LEGEND | |||
| 1 | Electronic analytic scale AG285 | 2 | Anti vibrating table TAV/A |
| 3 | Bench drill TRB/A | 4 | Cupellation furnace FCOPP/A |
| 5 | Annealing unit MSLR/B | 6 | Separation hood CS/B |
| 7 | Fume scrubber TLF/500 | ||
THE ASSAY LABORATORY
WEIGHING THE SAMPLE
ELECTRONIC ANALYTIC BALANCE TYPE ABT220
- 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)
| QT | PRICE: | TOTAL PRICE: |
| 1 | €3.700,00 | €3.700,00 |
DRILLING OPERATION
BENCH DRILL TYPE TRB/A
- Max. capacity to drill : 10 mm
- Speeds : n°4
- Spindle speeds : 450/rpm
- Ground base dimensions : 230x270 mm
| QT | PRICE: | TOTAL PRICE: |
| 1 | €450,00 | €450,00 |
ANTI-VIBRATING TABLE TYPE TAV/A.
- Overall dimensions : 890x710x800 mm
- Weight : 76 Kg
| QT | PRICE: | TOTAL PRICE: |
| 1 | €1.080,00 | €1.080,00 |
CUPELLATION
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
| QT | PRICE: | TOTAL PRICE: |
| 1 | €11.700,00 | €11.700,00 |
| 1/L | 2 | Nr | SILICON CARBIDE MUFFLE FOR FCOPP/A L=210 | €146,60 | €293,20 |
| 3/L | 6 | Nr | CERAMIC RESISTANCES FOR FCOPP/A | €110,90 | €665,40 |
| 5/L | 1 | Nr | SERIES OF ALUMINUM BRAIDS FOR FCOPP/A | € 137,00 | € 137,00 |
| 7/L | 12 | Nr | RESISTANCE TERMINALS FOR FCOPP/A | € 9,10 | € 109,20 |
| 12/L | 1944 | Nr | CUPELS N. 1 (22X19) (648 pcs per box) | € 0,61 | € 1.185,84 |
| 13/L | 1152 | Nr | CUPELS N°2 (26X22) (384 pcs per box) | € 0,63 | € 725,76 |
| 19/L | 1 | Nr | PINCERS TO REMOVE CUPELS | € 36,40 | € 36,40 |
| 20/L | 1 | Nr | LONG KEVLAR GLOVES | € 37,10 | € 37,10 |
ANNEALING
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
| QT | PRICE: | TOTAL PRICE: |
| 1 | €6.140,00 | €6.140,00 |
ACID ATTACK
SEPARATION HOOD TYPE CS/B
- Number of 6 place ovens : n°2
- Power : 4 Kw
- Dimensions : 1150x650x1820 mm
- Weight : 90 Kg
| QT | PRICE: | TOTAL PRICE: |
| 1 | €5.100,00 | €5.100,00 |
| 11/L | 6 | Nr | BEAKERS FOR FS6/A OVENS | € 14,70 | € 88,20 |
SCRUBBING OPERATION
NEUTRALIZATION TOWER FOR ACID FUMES TYPE TLF/500
- Power : 0.25 Kw
- Overall dimensions : 653x700x2165
- Weight : 65 Kg
| QT | PRICE: | TOTAL PRICE: |
| 1 | € 4.410,00 | € 4.410,00 |
| 15/L | 30 | Nr | CRUCIBLE 33X33 | € 7,00 | € 210,00 |
| 16/L | 50 | Kg | LEAD SHEET | € 13,90 | € 695,00 |
| 17/L | 1 | Nr | ASSAY CARRYING TRAY | € 25,70 | € 25,70 |
| 18/L | 1 | Nr | BEAKER DRAINER | € 119,30 | € 119,30 |
| 23/L | 10 | Nr | HORSE HAIR BRUSH FOR CUPEL DIAM. 10 MM | € 7,60 | € 76,00 |
| 24/L | 2 | Nr | GLASS CONTAINER FOR NITRIC ACID | € 71,70 | € 143,40 |
| 25/L | 1 | Nr | GRADUATED CYLINDER 100 CC | € 20,00 | € 20,00 |
| 26/L | 1 | Nr | GRADUATED CYLINDER 250 CC | € 25,70 | € 25,70 |
| 29/L | 1 | Nr | CUPELS TRAY FOR DRAY ASSAYS | € 33,60 | € 33,60 |
Melting Dept
MEDIUM FREQUENCY INDUCTION MELTING PLANT
TYPE FIM35CPU-P
The plant 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.
Technical data of the furnace
- Capacity of the crucible : 55 Kg Au
- Melting time : 25 minutes
- Dimensions : 900x1000x1870 mm (LxWxH)
- Interchangeability of the crucible to metl different precious alloys
- Automatic temperature control of the metal with a platinum, 10 % platinum-rhodium thermocouple
Technical data of the converter
- Power output : 33 kW
- Working frequency : 3.5-4 Khz
- Plant power hook up : 35 KVA
- Power-supply tension (3 phase/50 HZ) : 380 V, +/- 6%
- Power factor (cosF-i) : 0.9
- Required cooling power (generator/furnace) : 16500 Kcal/h
- Min pressure for the cooling water pump : 3 Bars
- Cooling water inlet temperature : 25° + 35°C
- The converter is fitted with a demineralised water cooling system consisting of a pump, an internal
deionizer with a conductivity sensor and a heat exchanger accessible from the outside so that it can be
connected to the general cooling system of the factory.
- Monitoring on the display of the process parameters electrical conductivity, as well as the working
parameters of the converter (tension frequency and the absorbed power).
- Computerised alarm diagnostics for 16 alarms or warnings which the worker must take note of for the
system to work properly. By simply pressing a button, instructions and advice appear on the display.
- Memorisation of the last 20 alarms which allows a rapid diagnosis of any eventual problems.
- Closed ring power regulation which allows the system to absorb the set power regardless of the quantity
and type of metal to melt.
- The internal environment of the converter is conditioned by an air-water exchanger.
- Threephase power-supply transformer :
- Nominal power: 35 KVA
- Nominal tension : depends on where the machines
- Allowed fluctuation of the electrical mains : +/- 10%
- Dimensions : Generator : 850x950x1800 mm (LxWxH)
- MELTING FURNACE
- The furnace is made up of a strong iron frame with 12 mm thick stainless steel sides to reduce losses
due to inductive phenomenae. The coil for induction heating is immersed in refractory cement. Both
crucible and coil are held in a resin and fibre glass casing of adequate thickness.
The crucible tilting system is hydraulic, by means of two double-effect pistons with regulable speed.
The crucible spins around an imaginary axis passing through its edge. The furnace is equipped with
two propane gas burners to protect the metal and the crucible edge from oxidation. The furnace is also
equipped with a timer which automatically stops both propane gas inflow and coil cooling pump after
the generator has been stopped.
| QT | PRICE: | TOTAL PRICE: |
| 1 | €50.970,00* | €50.970,00* |
| 9/A | 10 | Nr | EX 323 CRUCIBLES | € 121,40 | € 1214,00 |
Water chilling unit model FRIGO/81
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
- Deoxidation furnaces
- Fumes condensors for hollowing and refining plants.
| Cooling output | Frig/h : 24430 |
| Compressor | 12.5 kW |
| Tank capacity | 165 lt |
| Dimensions | 760x1860x1390 (LxWxH) |
| Weight | 330 Kg |
| Power supply | Threephase |
| QT | PRICE: | TOTAL PRICE: |
| 1 | €8.200,00 | €8.200,00 |
GRAIN PRODUCTION TANK TYPE RPG/B
The container is used both for the production of metal balls and fine
sand (dimensions : 1-2 mm3) used for refining.
It is made entirely out of stainless steel and is cylindrical in shape
with a truncated cone bottom. The tank is fitted with a special
discharge cap and rapid opening for the discharging the grit. It also
has a centrifugal pump for moving the water and for partial
emptying.
Furthermore, it is supplied with a stainless steel frame for the
supporting the perforated graphite container in which, after heating,
the molten metal is poured.
TECHNICAL DATA
- Power supply : three-phase
- Power : 0.4 Kw
- Capacity : 300 lt
- Overall dimensions : 840x830x1650mm (length-width- height)
- Weight : 50 Kg
| QT | PRICE: | TOTAL PRICE: | TOTAL PACKING: |
| 1 | €3,940.00 | €3,940.00 | € 260,00 |
| 15/H | 20 | Nr | CRUCIBLES 1 HOLE | € 64,10 | € 1.280,20 |
| 3/H | 20 | NR | CRUCIBLES MULTIHOLES | € 72,50 | € 1.450,00 |
EXAMPLE OF POSSIBLE LAYOUT
Refining Dept
Description:
The aqua regia gold refining tumbler is a new technology compared to static refining plants.
This refining unit consists of one PPL tumbler with a total volume of about 400 litres, inclined to 30° and rotated
by a motor, with the possibility to adjust the rotation speed. The rotation forces the gold grains to continuously
rub against each other reducing the overall dissolution time.
External to the tumbler there is a Pyrex glass condenser to condense the acid fumes reducing their overall volume,
thus resulting in a easier fume neutralization operation.
Another advantage is that it can work during the night without supervision.
The maximum daily quantity you can refine every day is 50 kgs of gold grains with a final gold purity of
999,5/1000 (minimum).
These rotating refining systems can refine gold grains as well as casting scraps and some types of
precious ashes.
The plant is made up of :
- N.1 PPL tumbler with a total volume of about 400 litres
- N. 2 Graduated tanks for HCl and HNO3. Acid transfer from the reactors by vacuum.
- N. 2 Filter units on wheels with a compressed air diaphragm pump to transfer the solutions.
- N. 1 500 litre cementation uit.
- N. 1 Electrical board
| QT | PRICE: | TOTAL PRICE: |
| 1 | €47,000.00 | €47,000.00 |
| 200 | Nr | CARTONCINO FILTR.OCTEX D 40 CM | € 1,40 | € 280,00 |
| 200 | Nr | PAPER FILTER 400 MM | € 0,30 | € 60,00 |
NEUTRALIZATION TOWER FOR FUMES
MODEL TLF/850
Description of the TLF/850 fume scrubber
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.
Technical data:
- Power supply : three-phase.
- Power : 3 kW
- Overall dimensions : 1500x1200x3500 mm (length-width-height).
- Working weight : 350 kg
| QT | PRICE: | TOTAL PRICE: |
| 1 | €11,875.00 | €11,875.00 |
Water treatment Dept.
RESIN RECOVERY SYSTEM TO RECOVER TRACE PRECIOUS
METALS
Resin unit
The unit contains a series of selective resins to recover precious PGM and Au metals from the incoming
solution.
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 :
- n.3 Columns, 2 round bottoms DN300, 3 DN25 flanges, 1 DN100 handrail, PP nozzles
- n.1 Column resting base
- n.4 Pressure gauges with traps
- n.22 Valves 546-DN15
- n.1 Pneumatic valve 028 DN15
Storage tank
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
| QT | PRICE: | TOTAL PRICE: |
| 1 | € 28.000,00 | € 28.000,00 |
ACID WATERS NEUTRALISATION PLANT
MODEL IN/B
DESCRIPTION OF THE IN/B 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 consists of :
A) No. 1 1500 lts. capacity tank complete with agitator to stir the incoming solution.
B) n°1 Filter press type 440/50.
- The filter press is used to filter water and slime in order to recover precious metals. The press is
fitted with a 700 liters 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 plant. - The solutions exiting the filter press contain chlorides, nitrates and sodium sulphates that can be
concentrated or diluted with other waste waters.
Technical Data of the Filtering Press Unit :
- Power supply : Three-phase
- Power : 1,5 Kw
- Plate dimensions : 440 x 400 mm.
- Number of plates : 50
- Useful Volume of slime contained : 250 liters
- Type of plate-locking system : Hydraulic
- Weight : 740 Kgs.
- Overall dimensions of the Filtering Press : Length= 4050 x Depth= 850 mm. x Height= 1300 mm.
| QT | PRICE: | TOTAL PRICE: |
| 1 | € 29.500,00 | € 29.500,00 |
Grain production Dept.
MEDIUM FREQUENCY INDUCTION MELTING FURNACE
TYPE FIM/20RPG
Description
The plant is ideal for producing both “ HIGH QUALITY ” precious and non precious metal alloys, in an
inert gas environment to avoid oxidation.
The plant is provided with the following parts:
- Medium Frequency Converter
- Melting and alloys homogenizing Furnace
- Grain Producing Tank
Technical specifications of the plant:
- Crucible Capacity: 20 Kgs. Au or 10 Kgs. Ag or 8 Kgs. Master Alloy.
- Under Pressure system on the upper chamber in order to do a proper taphole’s cleaning.
- Water cooling by means of and heat-exchanger device for keeping a constant water’s temperature
before the last melting cycle. - The whole melting, pouring, grains tank emptying and filling steps are controlled by a PLC unit
provided with a TOUCH-SCREEN panel, able to memorize all the different parameters in order to
make various melting programs according to the type of alloy to be molten. - Absolute alloy homogeneity guaranteed by the medium frequency converter. This means that the
inductive currents which heat up the metal automatically stir the alloy during the melting and the
pouring cycle. - Double efficiency in comparison with the high frequency melting furnaces.
- Reduction of melting losses due to a more even distribution of the temperature on the material
being melted. - It is not requested skilled staff.
1. Technical data of the Medium Frequency Converter
- Power output : 20 kW
- Working frequency : 3,5 - 4 Khz
- Power-supply tension (3 phase/50 HZ) : 380 V, +/- 6%
- Power factor (cosF-i) : 0.9
- Required cooling power (generator/furnace) : 15000 Kcal/h
- Cooling Water Minimum Capacity : 23 lt/min
- Minimum pressure for the cooling water pump : 3 Bars
- Cooling water inlet temperature : 30° + 35°C
- The converter is provided with a centrifugal pump placed inside the converter’s frame to be used for the
recycling of the cooling water. The above pump is equipped with a pressure switch, thermals, fuses and
a timer for the automatic stop. You need only a demineralised water storage tank or a water chiller.
- Monitoring on the display of the process parameters electrical conductivity, as well as the working
parameters of the converter (tension frequency and the absorbed power).
- Computerised alarm diagnostics for 12 alarms or warnings which the worker must take note of for the
system to work properly. By simply pressing a button, instructions and advice appear 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.
- The internal environment of the converter is conditioned by an air-water exchanger.
- Three phase power-supply transformer :
- Nominal power: 20 KVA
- Nominal tension : depends on where the machines
- Allowed fluctuation of the electrical mains : +/- 10%
2. Melting and alloys homogenizing Furnace
Induction furnace equipped with vertical pouring device under protective atmosphere.
- Crucible : Graphite
- Capacity of the crucible : 20 Kg Au, or 10 Kgs. Ag , or 8 Kgs. Master Alloy.
- Melting time : 15 minutes
- Complete Cycle Time : 30 minutes (Including grains tank filling and emptying steps)
3. Grain Producing Tank
Stainless steel tank fitted onto a trolley and with the relevant rails, for the pouring of the grains inside the
water, under inert gas protection.
The tank is fitted with a special discharge cap and rapid opening for an easy recovery of the grains.
Furthermore, it is supplied with an electrical board for the control of the hydraulic system, for the
pouring temperature checking and all the others necessaries operations.
| QT | PRICE: | TOTAL PRICE: |
| 1 | € 58.000,00 | € 58.000,00 |
Water chilling unit model FRIGO/31
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
- Deoxidation furnaces
- Fumes condensors for hollowing and refining plants.
| Cooling output | Frig/h : 11870 |
| Compressor | 7 kW |
| Tank capacity | 110 lt |
| Dimensions | 660x1280x1340 (LxWxH) |
| Weight | 200 Kg |
| Power supply | Threephase |
| QT | PRICE: | TOTAL PRICE: |
| 1 | € 5.800,00 | € 5.800,00 |
| QT | TOTAL SYSTEM PRICE: | TOTAL PACKING: | TOTAL SYSTEM W/PACKING |
| 1 | €274,845.00 | € 260,00 | € 275.105.00 |
| Note: Price does not include Consumables and/or Spares. | |||
FACTORY TECHNICIAN TRAINING @ 960,00 euro / day
PLUS ALL TRAVEL-RELATED EXPENSES
Ex-Factory, Italy
Price: € 276.105.00
Check the latest exchange rate
Listed price subject to manufacturers price increases without notice.
