PEMBUATAN PUPUK FOSFAT DARI BATUAN FOSFAT ALAM SECARA ACIDULASI

Abstract

Abstract Phosphate rock containing P2O5 can be used as raw material of phosphate fertilizer. Phosphate rock can be found in many areas in Indonesia, but its P2O5-content is relative low. In this research, phosphate rock from Rembang (P2O5-content 11.37%) is used as raw material for phosphate fertilizer production by acidulation process using phosphoric acid solution. Operation variables are phosphoric acid concentration (10, 20, 30, 40 %-vol), spraying model of phosphoric acid solution (one hole and many holes), and spraying position of phosphoric acid solution (end, centre, end & centre). The result shows that the increase of phosphoric acid concentration is proportional to P2O5-content in phosphate fertilizer with highest P2O5-content in the amount of 18.29%. One-hole spraying model and end-position spraying gives highest phosphate fertilizer yield in amount of 169.5 grams. Keywords: acidulation, phosphate fertilizer, spraying