The tunnel
kilobar machine and accessories equipment that we suggest will have a better guarantee of a quality
product. Do not forget you need a refining plant as first step.
Our furnace has a standard production capacity of 15 silver bars 100 Oz each hour or 50 bar of Gold
1000gr per hour.
Daily you will need a good quality of grain to make easy the weighing , then we propose a graining
furnace under protective atmosphere to get good quality of Grain.
The grain will be then dried and weighed ( manually ) and transfer inside the mould Manually,
Due to the quantity you have scheduled , the production can be made manually. You need then a
high precision scale
Then the grain will be transfer inside the mould.
The mould will be place and loaded inside the tunnel-bar furnace and continuously the grain inside
the mould will be melted and formed according to the mould print.
While the mould will come out, we will have the 100 Oz or 1000g bar blank, …
The operator will check for quality surface and weigh , then is passed ok, the ingots will be
stamped with the logo and with the serial number ( if required).
After this operation a last weigh control before packaging the ingots
Here is a general example of a layout of the plant:

1 PROPOSAL FOR THE GRAINING FURNACE KG.35
Z55-335 GRAINING MACHINE
Medium frequency induction
furnace for the production of grains
of gold, Silver and their alloys, with
automatic temperature control,
equipped with stopper pneumatic
device for the emptying of the
melted metal.
Equipped with a microprocessor controller at liquid crystals for the regulation and the check of the furnace, with electronic power generator of new concept.
Advantages Of The New Generator :
- Faster melting times thanks to a new inverter technology ;
- Smaller dimensions;
- More silent.
Operator controlled parameters :
- Start and stop;
- Power regulation and setting;
- Temperature regulation and setting;
- Alarm messages;
- Pouring ( automatic tap lifting system)
Melting head under vacuum or over-pressure atmosphere The melting head is sealed and under vacuum or over-pressure atmosphere to get purer melting without metal contamination.
External tank complete with :
- Special rails for tank movement;
- 300 litres capacity;
- Automatic lifting and lowering of the grain recovery basket;
- Internal water circulation system.
EC certified furnace
- Notes concerning the diameter of the produced grains
- The grains produces are of spheroidal form no perfect, with different diameters according
to the outlet holes of the die. The diameter of the grains’ drops changes according to the
use of the die. If the die is very used and the diameter of the holes is not like the origin,
the diameter of the drops can change.
With die in good state, it is possible to grant a diameter of about +/- 1,5mm for the 80%
of the produced grains.
Example: 35Kg of grains of Ag999 with medium diameter of 4,5mm will give as result
about 28Kg of drops included from 3 to 6mm and the rest of about 7Kg in grains of
diameter superior or inferior.
| Power supply Induction Heating Power Induction melting working frequency Useful size of the crucible (18kt gold or 925 silver) Max working temperature Protection gas over crucible Protection gas under die |
400V 50Hz/three phases; 35 kW; ~6 Khz; ~35 kg; 1250° C; Argon or Nitrogen mixed with GPL propane; Argon or Nitrogen |
Pos. 2.0: Centrifugal dryer
2- Z04-05 CENTRIFUGAL DRYER
Hydro-extractor made of
stainless steel for gold,
silver, fancy jewelry,
optical manufacturing.
Centrifugal dryer Mod
360
Complete with panel
control , timer and
thermostats 90°C
Case and cover in
Stainless steel Aisi 304
Basket in Stainless steel
with net ( holes of 2mm)
Hot air forced fan
| - Electrical power supply Outside dimensions Dimension Of the centrifugal basket Dia. 3 RPM of the basket Motor power Number of Heating Resistance Power of Heating Resistance Maximum weight to works Total Electric power Net weight |
400/50Hz/triphase; 46 x 82x100 (H) cm; 60 x H 300mm 500 rpm 1,0 hp; n.1, 6000 W 40 Kgs; ~ 6.5 kW; 217 Kg; |
N.B.: Data here above are not binding and they could be changed during the construction phase of the machine
3- PROPOSAL FOR THE ELECTRIC FURNACE ART.Z53_05 FOR GOLD/SILVER BAR PRODUCTION

Example of production :

Art. Z53-05 Induction Furnace :
Continuous induction furnace straight type for the production of gold bullion in controlled
atmosphere. Suitable for working with graphite ingot moulds.
| Z53-05 |
|
| POWER | 90 Kw |
| -Production capacity of silver bar 100 Oz(Ag 999,9) | 15 pz/hour |
| -Production capacity of silver bar 1000gr(Ag 999,9) | 50 pz/hour |
This kind of furnace is equipped with automatic devices of control and regulation,
controlled by PLC.
The furnace is equipped and built according to the Directive Machineries (EC brand). The
furnace will be equipped with “carter” and safety protections and with instruction manual in
accordance with the EC Normative
Description Art. Z53-05
THE FURNACE IS COMPOSED OF 6 PARTS:
- LOADING ZONE OF THE INGOT MOLDS (ALREADY CHARGED WITH METAL)
- HEATING BODY FOR THE MELTING OF THE MATERIAL IN THE INGOT MOULDS.
- SOLIDIFICATION AND COOLING ZONE.
- DISCHARGE ZONE OF THE INGOT MOLDS.
- POWER ELECTRIC BOX .
- MANUAL CONTROL CONSOLE.
LOADING ZONE, COMPOSED BY:
- Sturdy painted framework;
- Sliding track for the ingot moulds’ feeding (already charged with metal);
- Pushing motorized device for the advancement step-by-step of the ingot moulds
equipped with mechanical components of precision;
HEATING BODY, COMPOSED BY:
- Strong painted carpentry
- Heating inductor, foreseen for the longitudinal advancement of the ingot moulds, fully
let into the refractory cement and water cooled; this inductor is enclosed in panels of
insulated material; - Inside the inductor are placed some tracks and cooled guides for the advancement of
the ingot moulds. - Safety thermostats of inductor’s over-temperature;
- Protective gas entry on the inlet mouth of the ingot moulds;
SOLIDIFICATION AND COOLING ZONE, COMPOSED OF:
- Sturdy painted carpentry;
- Lower plates of electrolytic copper, equipped with lateral guides for the sliding and the
cooling of the ingot moulds; these plates are water cooled. - Upper plates at variable positioning for the cooling of the upper part of the ingot
moulds; these plates are cooled by water; - Metal covering for the containment of the protective gas;
- Protective gas entries in the solidification and cooling zone of the ingot moulds;
- Flow meter for the reading and regulation of the protective gas;
- Distribution pipelines and cooling water controls;
- Optic reader of temperature of the ingot moulds in solidification zone;
ZONE OF INGOT MOULDS’ DISCHARGE, COMPOSED OF:
- Sturdy painted carpentry;
- Sliding track for the ingot moulds’ containment;
- Sensors of the presence of the ingot moulds with loud overflow alarm;
ELECTRIC POWER BOARD, COMPOSED OF:
- Medium frequency of 90 Kw for the Z53-05, completely solid state;
- Electronic components of quality: low-leakage inductors, low-loss condensers for high
frequency, oversized static power components, rigorously tested electronic control
circuits; - Feeding transformer net side, built with dry execution and integrated in the converter;
- Heat exchanger cooling group at heat exchanger provided for the converter for the
medium frequency condensers; - Manual control panel, including the controls and the regulators for the heating and for
the movement of the ingot moulds; - CONTROL CONSOLE PLACED NEAR THE CHARGE ZONE, COMPOSED OF:
- Electric board containing electric and electronic components;
- Panel with controls and manual regulators for the heating and for the movement of the
ingot moulds. - The furnace is composed as detailed above and is able to produce gold-bars with
manual power regulation in function of optical sensor of temperature. The furnace is
also equipped with Plc which does not provide the storing of programs and work
parameters.
COMMISSIONING :
The services of our staff who will come to your factory to assist in installation, the technical
trial of the machinery, operation, to test the electrical, electronic, pneumatic equipment for
the plant.
- Commissioning : included
- Room and board : at Your Charge.
- Travel expenses : included
- Internal moving taxi : at Your Charge.
- Staff : Normally the time-table for a complete installation
and training requires 1 technician for 06 working days
with the connections already made exclude travelling
days from and to per Italy
| Feeding |
400V or what you require/ threephase 50/60 Hz; |
| Furnace’s power |
~90 KW; |
| Treatable materials |
Gold AU 999,9 AU 999,5 |
| Type of bullions which can be obtained (AU 999 24kt) (AU 999,5) |
From 50 g to 1.000 g |
| Maximum working temperature |
~1300°C; |
| Type of protective gas |
Nitrogen, Argon, etc; |
| Min-Max temperature of supply water |
18-30°C; |
| Max productivity- KILOBAR - 100 Oz BAR |
50 pz/hour; 15 pz/hour; |
| NOTE 1: Data here above are not binding and they could be changed during the studying or construction phase of the machine. NOTE 2: Remain excluded everything which is not provided in the present offer |
|
FURNACE CONTROL SYSTEM
The furnace Art.Z53_05 is equipped with a types of control systems as follows:
The furnace is able to produce gold-bars with automatic power regulation in function of
optical sensor of temperature. Also it included all devices and servomechanisms to set and
control all water temperatures, gas temperature and their quantity. All these data are
managed directly from Plc. The quantity of water and gas are set manually on the
keyboard panel, and these values can be stored and recalled by a program from Plc it
operative panel. In addition all the data are managed by a Personal Computer by the
software which will be able to connect in line extra computers and the possibility to find
more work solutions ( like graphics and database production).
NOTE : Data here above are not binding and may be changed during the engineering and
construction phase of the machines.
| Model |
Z53-05 | |
| Furnace Power |
Kw | 90 |
| Length size |
mm. | 5,300 |
| Width size |
mm. | 2,800 |
| Height size |
mm. | 1,800 |
| Tension Volt | Volt | 400 |
| Frequency Hz |
Hz | 50 /60 |
| Furnace weight |
kg. | 1,250 |
| Kilobar/hour production |
pcs/hr | 50 |
| 100 Oz/hour production |
pcs/hr | 15 |
| Weight loss grams-kilo in 1000 gr |
Gr/Kg | 0,001** |
| Weight loss grams-kilo in 100 Oz | Gr/Kg | 0,2* |
Note 1:
CONCERNING THE CONSUMMABLES AND SPARE PARTS
The gold bars furnace, the grain machine, the continuous casting machine need a minimum quantity of spare parts to
have ready in stock to be used, in case of emergency, from our technician to finalize the job. It can happen that during
the shipment a die or a crucible or other is broken; if our technician has not the materials there, he can not do his job.
For example, the goldbars furnace need to operate moulds, covers spacers, resistances of spare, etc...
Note 2:**
For the finished product weight it s important the initial weight control made by Your operator and alloy quality
Our system can assure you a lost of gr/kilo of 0,001 for the 1000 gr and 0,2 in case of 100 Oz from any initial load.
Note 3:
SETTING OF FINISHING QUALITY OF THE GOLD BARS
Even if the incoming pure gold results to be of high requested quality [gold 9999 (99,99%) it is possible that the
residual impurity (0,01%) contains a combination of undesired element – impossible to define before – that can bring
undesired colour or superficial stripe on the GOLD BARS.
Said undesired colour or superficial stripe can be eliminate selecting a type of the incoming pure gold that has elements
Said setting phase can last a few weeks; The GoldPro® technical staff will provide a complete instruction to the Customer
staff so that the setting can be effected by the customer staff itself.
Example of final production:

4-Z14-57 COOLING UNITS WITH 69.800 FRIG/H. for grain machine and kilobar
Art.Z14-XXwith by pass kit: Cooling group with
closed circuit for cooling water with capacity of
69.800 Frig/h Mod 251.
The cooling unit is equipped with a storage tank
where is immersed the water/ freon Exchanger
This unit is suitable to be connected to closed water
circuit with pressure till 6 bar
The units has a protection grade IP54 and can be
placed externally to the building.
Low loading lost less than 1m.c.a ( 0,1 bar)
Control and command through a microprocessor that
measured and set the mean parameters and
temperatures
Technical data
- Framework made with painted and steel panel
- Hermetic freezing Compressor cool down by
freezing solution - Condensor is composed by several fin battery with
cupper piping and several fans - Water/ freon heat exchanger
- storage tank
| Power Supply: Cooling range (Ambient temp.25°C, Water temp. 15°C): Electrical cooling power Absorbed electric power: Installed electric power (compressor) Pump 0 Electric power Water flow Water Pressure Axial Fan Electric power ( ( n.2) Capacity of the tank: Dimensions (L x P x H): Net weight: |
400V/50-60Hz/trifase; 122.000 frig/h; ~ 146,00 kW; ~ 55 kW; ~ 32.60 kW; 4 kW 25 mc/h 3 bar 4,00 Kw 500 litres; ~ 1255x 3200x2140 mm; ~1285 kg; |
5- NITROGEN GAS GENERATORE- Z09-604
The nitrogen gas generator is a generator that produce
continuously Nitrogen On-Site from compressed-air through
a special Molecular Sieve.
The generator is able to produce directly Nitrogen in
pressure till 8-10 bar ( according to the pressure feeding of
compressed-air) and with high purity, suitable for several
industrial application.
The machine is equipped with an instrumentation suitable
to have a constant control on the flow and purity of the
produced Nitrogen gas and giving the guarantee of the inlet
on line as per the value registered on the computer.
The generator remain anyhow a very simple device,
completely manage via a PLC and carry out with high
reliability electro-pneumatic components This reduce
considerably the maintenance for a long period of
operating.
PRINCIPLE DRAWING OF PROCESS

TOGETHER WITH THE MACHINE WE RECOMMEND TO SUPPLY TWO TANK AS
ILLUSTRATE IN THE UPPER DRAWING – THOSE TANKS ARE NECESSARY FOR THE
PROCESS AND FOR THE STORAGE OF THE NITRGEN. IF THE 3 UNITS WILL BE PLACED
ON DIFFERENT SITE IT WILL BE NECESSARY 2 TANKS OF EACH UNIT OTHER WISE IT IS
POSSIBLE TO GET TWO TANK WITH BIGGER SIZES.
| - POWER SUPPLY POWER OF THE FURNACE NUMBER OF TOWER |
230V-50HZ-60HZ/SINGLE PHASE 0.120 KW; 1 X 2 TOWERS; |
| FEEDING COMPRESSED AIR REQUIREMENT | |
| - RANGE OF THE COMPRESSOR SIZE IN M³
/H MINIMUM PRESSURE REQUEST MAXIMUM PRESSURE REQUEST; MAXIMUM TEMPERATURE OIL CONTAINS MAX. WATER CONTAINS MINIMUM QUALITY REQUIRED |
REQUIREMENT + 20% BAR; 7.5 BAR; 10.0 BAR + 25°C; 5PPM; < 0,65 GR/NM³; ISO8573.1 CLASSE 1.2.1: |
| PRODUCTION OUTPUT OF NITROGEN | |
| - MINIMUM PRESSURE OUTPUT FOR NITROGEN MAXIMUM PRESSURE OUTPUT FOR NITROGEN COMPRESSED AIR PRESSURE IN THE ENTRY AIR REQUIREMENT FLOW RATE MINIMUM PURITY LEVEL RESIDUE OXIGEN O2 FLOW RATE OUTPUT ( FOR A NOMINAL STANDARD CONDITIONS *AMBIENT TEMPERATURE 20°C AIR REQUIREMENT FLOW RATE OR FOR MINIMUM PURITY LEVEL RESIDUE OXIGEN O2 FLOW RATE OUTPUT ( FOR A NOMINAL STANDARD CONDITIONS *AMBIENT TEMPERATURE 20°C |
6 BAR; 8 BAR; 8 BAR; 15 NMC/H 99,5% 0,5% 5 NMC/H 16 NMC/H 99,995% 0,005% 2,5 NMC/H |
| ENVIRONMENTAL CONDITIONS REQUIREMENT (SEE NOTE AND COMMETS); | |
| AMBIENT TEMPERATURE REQUEST RELATIVE HUMIDITY REQUEST MAXIMUM ALTITUDE ( FOR STANDARD PERFORMANCE) AMBIENT NOISE LEVEL (GENERATE) |
FROM 5 TO 35°C; FROM 20 TO 80%; 1000 M FROM SEA LEVEL: > 70DBA; |
| CONSTRUCTION ACCORDING TO CE EUROPEAN STANDARD | |
| - LOW VOLTAGE SECURITY ELECTROMAGNETIC COMPATIBILITY MACHINES DIRECTIVE ELECTRICAL SAFETY DIMENSIONS OF THE MACHINE ( WIDTH X DEEPTHXHEIGHT) NET WEIGHT OF THE MACHINE DIMENSIONS OF THE PROCESS TANK WEIGHT |
73/23/ EEC; 89/336/EMC; 93/68/EEC: EN60204-1; 750X1020X1900 MM.; 190 KG; 400X400X900 MM.; 185 KG ; |
6-STAMPING PRESS
![]() Numerator progressive marking ingots with 7 wheels (1 letter and 6 numbers) and characters 5 mm |
Max power of press during pressed |
ton. 60 |
| Max ride of sliding table |
mm. 110 | |
| Speed of approach / return table |
mm./sec. 343 | |
| Speed pressed |
mm./sec. 20 | |
| Light max. between the two tables |
mm. 280 | |
| Minimum thickness of the mold |
mm. 150 | |
| Frontal light between the columns |
mm. 420 | |
| Dimensions of work side |
mm. 600 x 400 | |
| Max pression of work |
bar. 250 | |
| Install power | kw 4 | |
| Power supply |
230/240 v 50 hz | |
| Dimensiones |
mm. L.930 P.880 H.1960 |
|
| Approx. weight |
kg. 700 | |
| NOTE 1: Data here above are not binding and may be changed during the construction phase of the machines and we will inform you every time of any possible modification. |
||
EXCLUSIONS FROM THIS OFFER:
GoldPro® will grant the performances mentioned in the previous points only if the materials will
be available at the customer and if the works mentioned in this chapter will be made (these
ones are excluded from the supply of the plants).The supplies and works at customer care mentioned in this chapter must be
available within 30 days from the shipment of the machines.
After this period GoldPro® will not grant the performance of the plants, but the customer
must pay them the same.
- Incoming Metal Scraps
- Building of the supply and drain plants for all the machines as per the lay-out (electrical inout,
industrial water in-out, gases, suctions, air, ambient climatization, etc) - Acid and reagent for laboratory
- Acid and reagent thank and network
- Oxygen bottles
- Air Compressor Machine
- Tools and means for installation
- Jobsite warehouse and workshop, storage safety, site insurance
- Site office, office personal and communication facility
- Small mechanical shop (electric drill with peaks, tools, bench with vice, etc)
- Specialized technical personnel at the moment of the start up
(electrician, hydraulic, mechanic, etc) - Specialized technical personnel to be trained
- Design of civil works and civil works
- Local transport for the technicians
- AND ALL THAT IS NOT PRESENT IN THIS OFFER
|
In the case of breaking or bad working caused by materials of other suppliers, GoldPro® will be not responsable also in case
of items still in guarantee.
Ex-Factory
Price: 519.379,25
Check the latest exchange rate
Listed price subject to manufacturers price increases without notice.




