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"Green" and efficient. The C.HAFNER recycling process.

For all types of precious metal waste, sweepings and filings.




Precious metal recycling at C.HAFNER is carried out in several steps, which vary depending on the material to be recycled, i.e. refinery scrap or skimmings.

Sampling and analysis 

Sampling and subsequent analysis of the material submitted for recycling provides the basis for determining the precious metal content as well as for correct settlement. As this material is not generally homogeneous, it must first be homogenised. In the case of refinery scrap, the waste materials are homogenised by being melted down, whilst skimmings undergo heat treatment in an incinerator. Once all combustible substances have been removed, the ash is ground and homogenised through mixing. Solutions containing precious metal, such as cyanide or sulphite gold electrolytes, merely need to be filtered prior to sampling.

Reprocessing of materials containing precious metals

Sampling and analysis are followed by actual reprocessing of the material containing precious metal. In the case of skimmings this is carried out using metallurgical techniques, and for refinery scrap using various wet chemical methods, which provide for fast, low-cost refining with a high yield of precious metals. Besides gold and silver, C.HAFNER also refines platinum and palladium to produce pure metals.

Wet chemical recovery and purification

With wet chemical recovery processes, the materials involved need to be dissolved with strong acids due to their quality as a precious metal. Precipitation reactions cause the precious metal to separate from the solutions in the form of their salts. In particular, due to their chemical similarity, purification of the metals platinum and palladium is only possible with special equipment as developed and optimised by C.HAFNER.

Conversion into pure precious metals

Following separation and purification of the precious metal salts, these are then converted to pure precious metal through chemical reduction. A high quality standard is necessary for wet chemical refining if the required purity levels for the metals are to be ensured. These are 99.99% for gold, 99.95% for platinum and palladium and 99.9% for silver.


Phone +49 7044 90 333-888


C.HAFNER GmbH + Co. KG  .  Gold- und Silberscheideanstalt  .  Germany  .  Phone: +49 7044 90 333-0  .  Fax: +49 7044 90 334-0  .