Metal & mining project profile
Alcan Inc. announced a major expansion of the Alcan Gove Refinery in September of 2004. The $2.3 billion Alcan Gove Third Stage Expansion Project, known as ‘G3’, will increase production capacity from 2.0 to 3.8 million tonnes per annum. HPD was awarded the project for the spent liquor evaporation system. The evaporation system at the Alcan Gove G3 expansion required innovative process and mechanical engineering to achieve essential performance guarantees. HPD provided complete process system design, detailed engineering, process equipment, and commissioning supervision of the sodium aluminate system. Designed to concentrate spent caustic liquor, the evaporation system recovers chemicals used in refining mined bauxite in alumina production to minimize chemical makeup costs and water from this liquor to make the liquor suitable for re-digesting bauxite and maintain the plant water balance. The clean condensate produced by the system is recycled back into the process for the washing of effluents and to reduce water intake to the plant.