Induction Heating and Stirring
Medium-frequency induction heating transfers energy directly to the metal charge. Electromagnetic stirring supports a more uniform melt before pouring.
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The CDOCAST CDO-MT26 to CDO-MT31 series combines induction melting, a tilting crucible assembly and an integrated cooling-water pump in one compact cabinet. Standard configurations cover 4–30 kg gold batches for jewelry workshops, precious metal recyclers, refineries and metal casting facilities.
Practical features for repeated precious metal melting and direct mold pouring.
Medium-frequency induction heating transfers energy directly to the metal charge. Electromagnetic stirring supports a more uniform melt before pouring.
The crucible remains in the furnace during pouring. The handle or handwheel helps the operator direct molten metal into a prepared mold without lifting a hot crucible by hand.
A built-in pump simplifies connection to the cooling-water circuit. For frequent or extended operation, select a matching industrial water chiller.
The system includes operating protection for abnormal current, voltage and cooling-water conditions. K-type temperature measurement is available as an option.
Select the pouring structure according to batch weight, mold position and operator workflow.
Recommended for smaller gold melting applications within the 1–15 kg range; the standard model table starts at 4 kg gold capacity. Its compact stationary body and manual handle provide fast, direct control when pouring molten metal into a prepared mold.
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Designed around the standard 30 kg gold capacity CDO-MT31 configuration. The geared manual handwheel provides smoother crucible rotation and more controlled pouring for heavier precious metal batches.
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This upgraded manual tilting layout can be customized for approximately 20–50 kg gold capacity, depending on power and process requirements. Its compact cabinet and handwheel structure suit facilities that need heavier capacity with limited floor space.
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Motor-driven tilting is recommended for customized 30–50 kg gold melting applications. Powered rotation supports steady pouring and reduces the manual effort required when handling larger molten-metal batches.
▶ Watch VideoCompare power, gold and silver capacity, melting time, dimensions and crucible sizes for all standard models.
| Specification | CDO-MT26 | CDO-MT27 | CDO-MT28 | CDO-MT29 | CDO-MT30 | CDO-MT31 |
|---|---|---|---|---|---|---|
| Applicable metals | Gold, silver, copper, brass, bronze and compatible alloys | |||||
| Voltage | Three-phase, 380 V, 50/60 Hz | |||||
| Power | 15 kW | 20 kW | 25 kW | 30 kW | 35 kW | 40 kW |
| Gold capacity | 4 kg | 6 kg | 8 kg | 10 kg | 15 kg | 30 kg |
| Silver capacity | 2 kg | 3 kg | 4 kg | 5 kg | 8 kg | 15 kg |
| Typical melting time | 2–5 min | 3–6 min | 5–10 min | 6–12 min | 10–15 min | 15–20 min |
| Maximum temperature | 1600°C | 1600°C | 1600°C | 1600°C | 1600°C | 1600°C |
| Temperature measurement | Optional K-type temperature measurement | |||||
| Water pump | Equipped | |||||
| Machine weight | 130 kg | 130 kg | 130 kg | 130 kg | 150 kg | 200 kg |
| Dimensions (L×W×H) | 620×500×980 mm | 620×500×980 mm | 730×630×980 mm | 730×630×980 mm | 800×700×1050 mm | 1200×750×1310 mm |
| Graphite crucible | Φ85×Φ60×136.5 mm | Φ105×Φ70×155 mm | Φ115×Φ78×183 mm | Φ125×Φ90×183 mm | Φ150×Φ96×210 mm | Φ159×Φ127×240 mm |
| Quartz sleeve | Φ100×Φ80×136 mm | Φ120×Φ94×153 mm | Φ132×Φ106×180 mm | Φ143×Φ112×182 mm | Φ150×Φ132×207 mm | Φ186×Φ140×252 mm |
Melting time is a typical reference range, not a guaranteed cycle time. Actual results depend on the selected model, metal, batch weight, charge size, starting temperature, power supply, crucible condition and operating settings. Confirm the required voltage before ordering.
Match consumables and auxiliary equipment to the metal and production schedule.
CDOCAST can configure graphite crucibles according to the model and metal application. Confirm crucible compatibility before processing a new alloy.
The built-in pump must be connected to a suitable cooling-water circuit before the furnace is energized.
Product views showing the tilting assembly, cabinet layout and integrated cooling pump.
The standard parameter table covers compatible metals within the furnace and crucible specifications.
Capacity alone is not enough; match the complete process requirement before ordering.
A 4 kg gold induction melting furnace starts with CDO-MT26, while 10 kg and 15 kg gold smelting applications correspond to CDO-MT29 and CDO-MT30. CDO-MT31 is the standard 30 kg gold melting furnace configuration.
Final selection should also consider silver capacity, melting-time target, electrical supply and the required pouring mechanism.
View the CDOCAST manual tilting metal melting furnace catalog for model selection, machine configuration and purchasing reference.
Answers about model selection, temperature, cooling, crucibles and installation.
CDO-MT29 is rated for a maximum 10 kg gold batch, while CDO-MT30 is rated for a maximum 15 kg gold batch. Confirm the metal, required melting time, available three-phase power, production frequency and pouring arrangement before ordering.
The standard CDO-MT26 to CDO-MT31 models have a listed maximum temperature of 1600°C. Metal compatibility also depends on the selected crucible, batch size, furnace power and operating process.
Typical melting time ranges from 2–5 minutes for CDO-MT26 to 15–20 minutes for CDO-MT31. Actual time depends on the model, metal, batch weight, charge size, starting temperature, voltage, crucible condition and operating settings.
Yes. The standard models are specified for gold, silver, copper, brass, bronze and compatible alloys. Confirm the exact alloy, batch weight and crucible requirement with CDOCAST before processing a new material.
The furnace includes a water pump but still requires a correctly sized cooling-water circuit. A matching industrial water chiller is recommended for frequent or extended operation to maintain stable cooling-water conditions.
The standard parameter table specifies three-phase 380 V, 50/60 Hz. Electrical standards vary by country and facility, so confirm the available voltage, frequency and site wiring before production.
The tilting structure allows the crucible to remain in the furnace while the operator directs molten metal toward the mold. This can simplify handling and improve pouring control, but trained personnel, protective equipment and a suitable work area are still required.
K-type temperature measurement is listed as an optional configuration for the CDO-MT26 to CDO-MT31 series. Confirm the required measurement method and control range when requesting a quotation.
Send CDOCAST the metal, maximum batch weight, voltage, required production rate, cooling conditions and preferred pouring structure for model confirmation.