Italimpianti Orafi Sap - Italy

Marol, Mumbai, Maharashtra

The furnace is used to melt the precious ash samples in order to obtain a button containing the precious metals present in the ashes. The silicon carbide resistances give out a maximum power of 2 kw on each of the 3 resistance groups.

The plant is particularly suitable for the alloys of precious and non-production of grit.
Is composed by :

• medium frequency converter
• Melting furnace with hydraulic or mechanical overturning
• container production grit
• Frame for melting furnace lifting, complete with back stairs and walkway
• Rails for sliding production vessel grit

Converter Features:
Temperature of cooling water incoming request 25 35 C
Monitoring of the display of process parameters such as frequency, voltage and power consumption.
computerized alarm diagnostics for the detection of well 16 alarms or warnings of which the operator must take into account for the proper functioning of the system. Instructions and tips on good working practices are displayed by pressing a button.
Tracing in memory of the last 20 alarms that have occurred to the machine that allow a rapid diagnosis of any abnormalities.
closed-loop power control which allows to absorb the power system set regardless of the quantity 'and the type of metal to be melted.
The internal environment of the converter and 'conditioned by an air-water heat exchanger.

Features of the oven:
The oven is composed of a solid iron structure, with walls of stainless steel of 12 mm thickness in order to minimize losses due to inductive effects. The induction heating coil is immersed in a special refractory cement. Both the crucible that the coil are contained in a thick case made of resin plates and glass fiber.
The crucible tilting system takes place by means of two double-acting hydraulic jacks, with speed 'adjustable.
The rotation of the crucible, without spout, during the overturning is carried out with respect to an imaginary axis passing through the edge of the crucible.
The furnace is equipped with two propane burners that protect the metal from oxidation both during the melting that during casting. It 'also equipped with a timer that automatically shuts off the burner and the water pump of the cooling coil.

The melting furnaces for taste ashes of the FFC series are used to melt the ash of precious samples and obtain a rectangle containing the noble metals present in the ash.

The heating part of the furnace FFC / A is built with heating of silicon carbide rods that can deliver a maximum power of 2 kW on each of the 3 groups of resistors.

This power is adjusted automatically by means of electronic control of each phase, so that the operator avoids having to intervene manually in order to maintain the constant absorption over the three phases.

This allows a long-term resistances.

In the oven FFC / I on the other hand, the heating of the crucible takes place by means of an induction medium-frequency converter.
The furnace is provided with collector for the sliding of the suction with adjustment damper fumes.

Refreshed in design and performance, allow to reach the operating temperature in a very short time, with consequent energy savings and optimization of working cycles.

Both ovens are equipped with a software for the control of the manufacturing process:

Change the set point temperature
rise time adjustment and temperature descent
Adjusting retention time

The furnace for continuous casting of metals and precious metal alloys is designed to provide the user with a defined shape product strips (framework, rectangle, round, tube, tape, more .) to be sent to subsequent mechanical processing of drawing, rolling or other.
The continuous casting furnace is mainly composed of two overlapping zones, a melting zone of the metals and a controlled solidification of the same area in a defined shape.

MELTING ZONE
The melting of metals takes place in a graphite crucible by electromagnetic induction. The variable magnetic field, generated by the frequency converter installed on the machine, determines the formation of eddy currents in the graphite crucible and in the metal itself. The resulting Joule heating effect causes a temperature rise up to pass the metal or metal alloy melting point.

AREA OF CONTROLLED SOLIDIFICATION
At the bottom of the crucible is combined with a spinneret of the same material (graphite) that has a cavity of the desired shape by the customer (framework, rectangle, round, tube, tape, more .).
From this chain will exit the metal in the form chosen.
The chain, removable and interchangeable, constitutes the real of the crucible and once melted the bottom, the liquid metal begins to penetrate the shape of the chain assuming the shape of the cavity.
Advancement of metallic form when exiting the die provides a towing system based on motorized knurled rollers.

All functions are controlled by microprocessor
Digital power adjustment, speed 'entrainment, temperature of the crucible and of the die
High efficiency thanks to the medium frequency induction converter
Self-diagnostics with breakdown messages
Control of the temperature of the crucible and the chain by means of independent thermocouples
prevention system of the oxidation of metal

Vacuum melting furnaces FIM / FPt (Alloys Palladium, Platinum)

The oven is used for the vacuum melting of platinum, palladium, dental alloys. The induction furnaces Italimpianti Orafi are all equipped with static converters medium frequency (4 to 15 kHz), which guarantee the homogeneity of the alloys.

The high technical level achieved in the design of the inductors, also combined with a modular construction technique and the use of high quality materials, guarantees maximum production even in the harshest conditions. The furnace is composed of a completely stainless steel casing rafreddato water wheel in which the crate with the crucible and mold for casting or cylinder for tilting casting. The case is done by tilting motor with inverter and proportional joystick.

The oven is equipped with vacuum pump 65 m ³ / h and an optical pyrometer for temperature control. All the step of melting, casting and homogenisation takes place in a protective atmosphere, which can be, optionally, composed of gas Argon or Nitrogen.

• monitoring of the display of the converter operating parameters, such as voltage and power consumption;
• computerized alarm diagnostic for the detection of alarms or warnings of which the operator must take into account for the proper functioning of the system. Instructions and tips on what to do are displayed on the display;
• of closed loop power control which allows to absorb the power system set regardless of the amount and type of metal to be melted;
• the internal environment of the converter is conditioned by an air-water heat exchanger.

The range of machines for the casting of platinum and its alloys in ingots for wire and sheet ranges from small (capacity crucible 500 g) to medium (1-4 kg) to large (22 kg).Unlike other generators commonly used for this purpose fitted with valves and characterized by a low yield, the Italimpianti Orafi ovens have the unique features in the market to operate at an average frequency with an extremely high efficiency generator that is safer with regard to harmful emissions into the high frequency and which guarantees an energetic mixing of the alloys would otherwise be impossible.
These ovens allow operating temperatures up to 2000 CPossible use of crucibles in different materials such as graphite, clay graphite, silicon carbide, zirconium oxide, zirconium silicate, ceramic etc.Automatic temperature control with both immersion thermocouple that with optical pyrometerAutomatic Power control regardless of the amount and the type of metal to be meltedcomputerized diagnostics with alarm on the display monitor can be set in four languages the type of alarm and the recommended steps to fix the problemCircuit verification Function practicable keyboard for easy remote control drivencasting operation which can be carried out by manual extraction of the crucible, for tilting handwheel or hydraulic tipping.Auto-off function of the machine and its cooling system after a certain time of non-use of the same (useful at the end of the working day)