Research on Mass Transfer Process of AMD Corrosion Reaction and Model of Deposition Calculation for Acid Load

Abstract

Evaluate the influence instability by AMD corrosion based on the slope of a large-scale sulfide mine. On the basis of the corrosion experiment, carry out the researches on the solution ion change rules before vs. after evaluation; set up the mathematical expression of the AMD corrosion amount through the analysis of the corrosion mass transfer; establish the acid load deposition calculation model by AMD based on the oxidation mechanism analysis of sulfide ores; the engineering application indicates that, at the puddle, wells, sump and fracturing catchment areas, AMD acid load deposition was accumulated and the acid load is significantly higher than other area which is up to 500 mg/L; on the slope surface, as the time period affected by AMD is shorter, acid load is between 166~300mg/L; for the streams far away from mines, the acid load, less than 20mg/L, is at the minimum level. The model calculation result is consistent with the spot reality.