Analysis and Evaluation onthe Treatment System Optimization for Mine Acid Drainage with Natural Dolomite at Sociedadminera El Brocalcompany
Journal Title: American journal of Engineering Research - Year 2018, Vol 7, Issue 5
Abstract
:The research evaluated the technical and economic viability of taking advantage of dolomite used as a remediating agent for acid drainage in a mining company that currently uses lime. The dolomite and the acid drainage were characterized, the dolomite was conditioned to different granulometry and the processes and costs of the conventional treatment were described. Lixiviation tests were carried out evaluating dolomite effectiveness and also its combination with lime to obtain technically feasible treatment alternatives. Costs of the alternatives were projected to calculate the cost-effectiveness coefficients and their comparing with the conventional system to determine the economic viability. Three alternatives that include dolomite exploiting and the reduction of heavy metals concentration according to Peruvian legislation was determined. The alternatives correspond to the dosages of 0.4 g of natural dolomite with 0.03 g of lime; 0.3 g of calcined dolomite with 0.04 g of lime; 0.4 g of calcined dolomite with 0.03 g of lime. Its cost-effectiveness coefficients were 0.58, 0.64 and 0.62 Soles/m3, while in the conventional system it was 0.68 Soles/m3, reducing costs by 15%, 6% and 9% demonstrating techno-economic viability of dolomite use. The costs of sludge management, personnel, equipment, energy and supplies were also considered.
Authors and Affiliations
Lawrence Quipuzco, Erik Olivera, Daniel F. Lovera, Walter Pardavé
Keywords
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