CyPlus® CET - Cyanide Effluent Treatment

CyPlus has developed several CyPlus® CET Cyanide Effluent Treatment processes suitable for the treatment of cyanide-containing ore pulps, since conventional treatment methods, like hydrogen peroxide are mostly not feasible due to prohibitively high reagent consumption because of product decomposition. After collaborating in the field of Cyanide Effluent Treatment with Inco Tech, Canada for many years, CyPlus developed the CombinOx® process together with them and then acquired the know-how for designing and operating the SO2/AIR process.

Feasibility studies conducted by CyPlus in its laboratories in Germany compare various process options for the treatment of cyanide-containing ore pulps, including the following processes:

• CyPlus® Hot Caro’s Acid process
• CyPlus® Cold Caro’s Acid process
• CyPlus® SO2/AIR process
• CombinOx® process
• CyPlus® Cyanide Regeneration Process

The feasibility study clearly illustrates which of the processes can reach the desired discharge limits for cyanide most effectively. It also compares the operating costs, mainly the consumption of treatment reagents as well as the investment costs. Ultimately, the most economic and suitable process is recommended. After the feasibility study has been performed, a basic engineering package is prepared on the process of choice to accommodate a reliable up-scale to the site-specific conditions. Finally, tailor-made equipment (e.g. CyPlus® Caro’s Acid Generator) is constructed, installed and commissioned on site. The design incorporates state-of-the-art safety features and modern reliable material of construction. The CyPlus processes are especially suitable for treating cyanide-containing effluents from ore processing operations in order to comply with stringent limits such as those set by the International Cyanide Management Code, the World Bank, EU Mines Waste Directive and local authorities.

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