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Furnaces for Precious Metals

Furnaces for Precious Metals

Furnaces for Precious Metals

Product catalog summary
Overview
Carbolite Gero provides specialized furnaces for smelting and assaying precious metals, crucial for industries such as jewelry, electronics, and automotive systems. The document details two main types of furnaces: Cupellation Furnaces and Crucible Furnaces, each designed for specific processes in the precious metals market.
Cupellation Furnaces
These furnaces are used for the assay of precious metals using the cupellation method, compliant with ISO 11426:2014. They operate at a maximum temperature of 1200°C and are designed to handle hazardous vapors safely. Key features include preheated variable airflow, silicon carbide heating elements, and an insulated exhaust duct. Models vary in size and capacity, with the CF 24 being a floor-standing model capable of handling 24 cupels.
Crucible Furnaces
Designed for smelting, these furnaces operate at a maximum temperature of 1400°C. They are robustly constructed with silicon carbide heating elements and tiles for protection. The SCF range includes models with single or twin chambers, suitable for different customer needs. They ensure close temperature uniformity and effective fume control, essential for processing materials like catalytic converters and jewelry.
Smelting Process
Smelting involves separating precious metals from impurities using heat and chemical reducing agents. Carbolite Gero's SCF furnaces are equipped to handle the high temperatures and gases involved, with models designed for various scales of operation.
Assaying Process
Assaying determines the precious metal content in materials, crucial for hallmarking in the jewelry industry. The cupellation process is the preferred method for gold and silver, involving heating samples with lead and silver to remove impurities, followed by nitric acid treatment to isolate pure gold.
Conclusion
Carbolite Gero furnaces are internationally recognized for their precision, efficiency, and safety in processing precious metals, supporting both recycling and purity assessment.
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Catalog excerpts

Furnaces for Precious Metals-1

Furnaces for Precious Metals Furnaces for Precious Metals Ideal for Smeltin g Assayin & g

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Furnaces for Precious Metals-2

Cupellation Furnaces -for the assay of precious metals Carbolite Gero cupellation furnaces are designed for testing using the cupellation, or fire assay test, method to ISO 11426:2014, a standard test method used to determine their purity. The test method produces hazardous vapours. When used within a suitable fume management system, the cupellation furnaces are designed to handle the vapours without exposing the operator to these hazards. The design of the cupellation furnace range ensures protection from the corrosive environment which would damage a conventional furnace. Standard features •...

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Furnaces for Precious Metals-3

Crucible Furnaces -for the smelting of precious metal The Carbolite Gero range of robust top loading crucible furnaces are specifically designed for the smelting of precious metals and have gained in international reputation for close temperature uniformity, low heat loss and maximum fume control. The furnaces are robustly constructed from heavy gauge hollow steel section and zinc coated sheet steel panels. Silicon carbide heating elements surround the chamber sides and are protected by silicon carbide tiles. The hearth is constructed from refractory bricks and silicon carbide tiles. The SCF...

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Furnaces for Precious Metals-4

Recycling and assessing precious metals Global demand for precious metals continues to soar, whether for jewellery or for use in industrial applications. While gold and silver have been used for thousands of years in jewellery, more recently precious metals are performing useful and specialist functions in chemical processes, electronics manufacturing, aerospace and automotive systems, eg catalytic converters. Carbolite Gero equipment is used throughout the world both for recycling these relatively rare commodities and for assessing their purity. Two key processes in the precious metals market...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.