| Category | Muffle Furnace |
| Model | Silver Refining Furnace |
| Max Temperature | 1200°C (2192°F) |
| Working Temperature | 1100°C |
| Thermocouple Type | S (Platinum-10% Rhodium) |
| Thermocouple Details | High purity alumina insulation, Platinum sheath, 6mm diameter, Type S, Tolerance Class 2, 0 to +1450°C range |
| Heating Element | Kanthal A1 (FeCrAl) |
| Element Details | FeCrAl alloy with rare earth elements, Max temp: 1425°C, Superior cyclic performance |
| Chamber (MM) | 175 x 175 x 350 |
| Outer Body (MM) | 590.0 x 780.0 x 635.0 |
| Chamber Volume | 10.7 Litres |
| Volume (cu.ft) | 10.3 ft³ |
| Power Load | 7.41 kW |
| Power Supply | 220V, Single Phase |
| Gross Weight | 85.67 kg |
| Chamber Shape | Square |
This furnace is part of a system used to purify silver, separating it from base metal impurities or other precious metals. Operating at temperatures around 1000°C, it may use processes like cupellation or electrolytic refining. The working principle in cupellation involves melting the impure silver with lead in an oxidizing atmosphere; lead and other impurities oxidize and are absorbed into a porous cupel, leaving pure silver behind. Its purpose is to produce fine silver (99.9%+ pure) from scrap, coins, or mined bullion for industrial, investment, and artistic uses.
This configuration is suitable when the sample load must fit a 175 x 175 x 350 MM chamber with usable chamber volume of 10.7 litre, approximate power load of 7.5 kW, square chamber profile. It is commonly selected for laboratory, QC, metallurgical, ceramic, pharmaceutical and industrial heat-treatment work requiring stable heating and repeatable process conditions. Typical use includes general laboratory and industrial heat-treatment applications requiring stable, repeatable temperature control.
Equivalent chamber references: 175 x 175 x 350 MM, 18 x 18 x 35 CM and 7 x 7 x 14 INCH. Buyers searching for 1200 Degree Celsius Silver Refining Furnace 175 x 175 x 350 MM chamber; 1200°C Silver Refining Furnace 175 x 175 x 350 MM; 1200 Degree Celsius Silver Refining Furnace 18 x 18 x 35 CM chamber; 1200°C Silver Refining Furnace 18 x 18 x 35 CM; 1200 Degree Celsius Silver Refining Furnace 7 x 7 x 14 INCH chamber; 1200°C Silver Refining Furnace 7 x 7 x 14 INCH can verify the same physical chamber on this canonical product page before requesting price, GST invoice, packaging and delivery.
Trutherm manufactures 1200 Degree Celsius (°C) Silver Refining Furnace 175 x 175 x 350 MM Chamber for buyers who search by exact machine type, chamber size and 1200°C temperature rating. This page is specific to the MM dimension version, so the chamber size is presented in the unit normally used in the buyer's drawing, tender or purchase request.
A muffle furnace isolates the sample from direct contact with heating elements or combustion gases, giving cleaner, more repeatable results than an open flame or hot-plate process.
Because muffle furnaces are used across ashing, drying, calcination and light heat-treatment, the chamber and controller are specified for flexibility rather than one narrow process window.
As a general-purpose muffle furnace, this model covers a broader range of routine heating tasks than a process-specific ashing, tube or sintering furnace, making it the practical default when the lab runs mixed sample types rather than one dedicated process.