Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

In order to depress the chemical and biochemical degradation of acidic tailings, pH control by the mixing of limestone has an effect on the recovery of contaminated mine area. But there is a wide difference between the simple pH measurements and the amount of acid in the soil because of buffer action of the soil. Accordingly, the amount of limestone required to neutralize the acidic tailings can not be calculated from the pH measurements, hence another method is needed to determine the amount of limestone required for neutralization. Considering effects of agitation and agitation time, and a kind of solution to make slurry, this paper presents a standard quantitative analysis method of acid in abandoned mine tailings and calculation method to determine the quantity of limestone using specific surface area of limestone obtained from measured absolute acid quantity.