Author: A. Lalonde
Production, Refining, Fabrication and Recycling of Light Metals; Hamilton, Canada; August 1990
Abstract
Société Minière Raglan du Québec Ltée (SMRQ) just built a new 100% recycle loop facility in order to mitigate its Mill Process Water Discharge to its effluent. The effluent of the Raglan Mill Complex was determined to be toxic as defined under the Québec and Federal Environmental Regulations. The major component which contributes to the overall toxicity of the effluent was the use of high soda ash dosage in the concentrator process water for the nickel recovery. The new facility includes a 20,000 m3 underground water storage in a stope mined in permafrost and a new underground pumping station that will return 400 m3/h of process water to the Mill using 2 km of pipeline work. This project included other Mill modifications in order to reduce the river water consumption and establish a neutral water balance which allows the complete recycling of process water and eliminates the toxicity of the SMRQ effluent.
