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

The impurities contained in the phosphogypsum powders were removed, and re-utilization of the purified phosphogypsum for the improvement of farmland was investigated. The size classification for purification showed that the average amount of radioactivity in the phosphogypsum decreased from 12.8pCi/g to 8.1pCi/g, and the yield rate was 78.0wt% between 65 and 325mesh. The purified phosphogypsum was scattered to rye farmland, and the degree of bringing up was observed. The average height of rye grown in common land with and without lime fertilizer showed 112cm and 111.3cm, respectively. On the contrary that of rye grown with purified phosphogypsum showed 113cm. Furthermore, the production of barley increased from 6447 to 7377kg per hectare by using purified phosphogypsum. It is expected that re-utilization of phosphogypsum for fertilizer will save the cost of lime fertilizer, and gypsum industries will be activated.