Dr. Joachim Janus

Diplom-Chemiker Diplom-Wirtschaftschemiker

Wollseifener Str. 6 ∙ D-52152 Simmerath

Programme of Operations and Supply Range

in the Field of Precious Metals Refining 

Modern refining plants must not only guarantee a complete yield of precious metal in its purest form, with as little expense and difficulty in the operation as possible, but in recent years the environmental protection aspect of the processes used is gaining more and more in importance.

Our field of operations includes: 

- research into customer's orders and development of special processes,

- planning of complete plants or of individual special equipment for supplementing existing systems,

- provision of Know How and Engineering,

- delivery, installation, and commissioning of equipment and instruction of operating personnel, 

in particular for the following:

- Electrochemical gold prerefining plants, which produce less than 1 % of effluent and exhaust air related to conventional acid refining, and prerefine gold to a standard of approx. 970 ‰.

- Gold electrolysis plants, which reliable produce refined gold of 999,9 ‰ purity and better.

- Electrochemical gold electrolyte production and final electrolyte recovery, with simultaneous complete control and evaluation of platinum group metals.

- Conventional silver electrolysis plants for initial materials from 970 ‰ Ag.

- Silver electrolysis plants based on the Janus process, for silver alloys from 625 ‰. These alloys are electrolysed directly to pure silver of 999,7 ‰ and better, without the necessity of separate production and addition of AgN0₃.

- Special electrolysis plants for the electrochemical separation of Ag and Pd, in which Ag is recovered directly as refined silver. 

- Electrochemical final electrolyte recovery for Ag-electrolysis in 2 steps:

1. Electrolytic desilverisation step,

2. Special copper electrolysis for nitrate solutions.

- All necessary secondary processing equipment, such as

effluent and exhaust air control and purification according to the respective regulations,

melting and casting facilities including granulating plants,

plants for the production of precious metal salts.

- Equipment for refining of platinum, palladium, and rhodium with all secondary processing equipment.

- Controlled atmosphere furnaces for the decomposition of platinum group metal salts.

- Facilities for precious metal analysis.

- Membrane separation boxes made of ceramics.

The basic principle of all process steps is to prevent the formation of waste products and harmful materials as far as possible and to operate mainly with a closed recirculation system.

All plants are constructed in the unit-composed system. They can be extended as required and combined with each other over a wide range. In this way it is possible to build up a refining plant in steps.

We supply complete plants or we will supplement and extend your existing facilities.

Reference plants are available both at home and abroad.

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