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 |
€ 3.900,00 |
€ 3.900,00 |
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 |
€ 500,00 |
€ 500,00 |
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 |
€ 12.300,00 |
€ 12.300,00 |
Spares & Consumables
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 |
€ 7,00 |
€ 84,00 |
12/L |
1000 |
Nr |
CUPELS N. 1 (22X19) |
€ 0,61 |
€ 610,00 |
13/L |
1000 |
Nr |
CUPELS N°2 (26X22) |
€ 0,63 |
€ 630,00 |
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 |
€ 5.750,00 |
€ 5.750,00 |
Spares & Consumables
15/L |
10 |
NR |
CRUCIBLE 33X33 |
€ 7,00 |
€ 70,00 |
16/L |
10 |
KG |
LEAD SHEET |
€ 13,90 |
€ 139,00 |
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 |
CUPEL TRAY TO DRY ASSAYS |
€ 33,60 |
€ 33,60 |
FOUNDRY
INDUCTION MELTING FURNACE TYPE FIM/15TCPU
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.
Technical Data of the furnace
• Capacity of the crucible : 12,5 - 15 Kg of 18 Kt Au
• Melting time : 15 minutes
• Interchangeability of the crucible to melt different precious metal alloys
• Mechanical tilting of the crucible using a reduction gear and handwheel
• Dimensions : 800x1300x1700 mm (LxWxH)
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
⇒ The converter is fitted with a centrifugal pump to recycle the cooling water, fitted with a pressostat, thermals, fuses and a timer to automatically stop the pump. You require only a storage tank for demineralised water or a water cooling plant.
⇒ Display monitoring of the working parameters of converter as tension and absorbed power.
⇒ Computerised alarm diagnostics for 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.
⇒ The internal environment of the convertor is conditioned by an air-water exchanger
⇒ Threephase power-supply transformer :
• Nominal power: 15KVA
• Nominal tension : depends on where the machines
• Allowed fluctuation of the electrical mains : +/- 10%
QT |
PRICE |
TOTAL PRICE |
1 |
€ 25.500,00 |
€ 25.500,00 |
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.
Technical characteristics
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 |
GRAIN PRODUCTION TANK TYPE RPG/E
The container is used both for the production of metal balls and of fine sand (dimensions : 1-2 mm3) used for refining.
It is made entirely out of stainless steel and is cylindrical in shape. It can be easily tilted to recover the grains. It is also fitted with a centrifugal pump to circulate the water as well as to empty the tank.
TECHNICAL DATA
• Power supply : three-phase
• Power : 0.4 Kw
• Capacity :150 lt
• Overall dimensions : 900x900x1200mm (length-width- height)
• Weight : 50 Kg
QT |
PRICE |
TOTAL PRICE |
1 |
€ 3.400,00 |
€ 3.400,00 |
7/H |
10 |
Nr |
CRUCIBLE+HOLDER RPG/E 1 HOLE |
€ 46,20 |
€ 46,20 |
8/H |
10 |
Nr |
CRUCIBLE+HOLDER RPG/E 25 HOLES |
€ 52,50 |
€ 52,50 |
Aqua regia
Gold Refining
REFINING TUMBLER UNIT TYPE IAO/BR100
This refining system consists of one big cylinder made of polypropylene with a total volume of about 200 litres and a useful capacity of about 100 litres (acids plus gold grains), this cylinder is inclined of 25° and it continuously rotates by means of a special motor, with the possibility to adjust also the speed rotation.
This continuos rotation allows a very good rubbing of the gold grains and consequently a quick and proper dissolution of them.
Externally of the “ Tumbler “ there is a Pyrex glass condenser with a cool water circulation that allows a good acids recovery and a good fumes neutralization.
Another big advantage is that it can work also in the night without any workers’ supervision.
The maximum daily quantity which you can refine every day is of 24 kg (12 kg per cycle) of gold grains getting a final gold purity of 999,5/1000 (minimum).
It is a polyvalent unit as it allows to refine the gold grains as well as the casting scraps and some types of precious ashes.
Gold Grains ⇑
Casting Scraps ⇑ Precious Ashes ⇑
The plant is mainly made up of :
• Polypropylene hood containing with suction fan to be connected to a fume scrubber.
Designed to the recover any acid losses.
• One big cylinder made of polypropylene with a useful capacity of about 100 litres (acids plus gold grains), this cylinder is inclined of 25° and it continuously rotates by means of a special motor, with the possibility to adjust also the speed rotation.
• No. 2 Graduated tanks for HCl and HNO3. Acid transfer from the reactors by vacuum.
• 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 heigh, the second 750 mm.
• No. 1 100 litres Cementation Unit.
• No. 1 Electrical board
Technical Data :
|
Power supply |
: Single - phase. |
|
Power |
: 0,8 Kw |
|
Overall dimensions |
: 2600 x 1200 x 2500 mm. ( Length – Width - Height). |
|
Weight |
: 400 Kgs |
QT |
PRICE |
TOTAL PRICE |
1 |
€ 41.000,00 |
€ 41.000,00 |
Accessories
RX/PH |
1 |
Nr |
REDOX - PH KIT |
€ 745,00 |
€ 745,00 |
Consumables
27/M |
50 |
Kg |
METABISULPHITE |
€ 1,80 |
€ 90,00 |
26/M |
100 |
Nr |
FILTER PAPER DIAM. 400MM |
€ 0,30 |
€ 300,00 |
NEUTRALIZATION TOWER FOR FUMES MODEL TLF/850
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 |
€ 16,500.00 |
€ 16,500.00 |
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
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 |
€ 31.000,00 |
€ 31.000,00 |
ACID WATERS NEUTRALISATION PLANT MODEL IN/A
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 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
• Power supply : three-phase
• Power : 1 Kw
• Plate dimensions : 320x320 mm
• Number of plates : 50
• Volume of slime contained : 100 lt
• Overall dimensions : 2680x580x830 mm
Type of plate-locking system : mechanical
QT |
PRICE |
TOTAL PRICE |
1 |
€ 21.000,00 |
€ 21.000,00 |
Ingot production
INDUCTION MELTING UNIT FIM/12LING
The furnace is ideal to produce 1 kg Au ingots. 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
• 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 : 10 kW
• Power output : 9.5 kW
• Required quantity of the cooling water : 20 lt/min
• Capacity of the crucible : 2 Kg of Au
• Melting time : 15 minutes
• Dimensions : 485x510x915 mm (LxWxH)
• Weight : Approx. 216 Kg
⇒ 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.
⇒ Threephase power-supply transformer :
• Nominal tension : depends on where the machines
• Allowed fluctuation of the electrical mains : +/- 10%
⇒ Pulse stirring function for special alloys
B. INGOT SOLIDIFICATION CONTROL UNIT
This special unit consists of :
Water cooled work table on which the ingot moulds are placed
Ingot solidification control unit – fitted with photoelectric cells and timed propane gas burner
QT |
PRICE |
TOTAL PRICE |
1 |
€ 19.000,00 |
€ 19.000,00 |
- Optional Installation & Training
- € 960.00/Day plus flight/travel related expenses
Ex-Factory, Italy
Price: € 202.437,70
Check the latest exchange rate
Listed price subject to manufacturers price increases without notice.
