적니(赤泥)의 자원순환 평가에 관한 연구

Abstract

At present red mud didn't recognized as recyclable resources because of large generation and some problems such as impermeability, high pH value, aluminium leachate, and causing red water in Korea. In order to recognized as recyclable resources, therefore, we suggest the policy proposals were suggested by reducing the above mentioned problems. In 'Waste Management Act' similar inorganic sludge which has similar characteristics with red mud is regulated land treatment by mixing with general soil, so red mud should be treated in the same method in order to promote the permeability. Red mud should be neutralized because its pH is very high. It should be careful in neutralized operation because of red water generated from red mud. It may be suspected that the red water is contaminated un aesthetic point. To reduce the strength of red water, red mud is treated to a magnetic process in order to recover the magnetic ferrous material. Through this magnetic process, ferrous material could be recovered 20 thousand ton per year, and the color intensity reduced to 77.3%.