RECOVERY OF MANGANESE FROM MANGANESE ORE REDUCTIVELY ACID LEACHING PROCESS USING REEDS (IMPERATA CYLINDRICA) AS REDUCING AGENT

Recovery of manganese from ores was investigated by reductive leaching method using reeds as a reductant in the sulfuric acid medium. Cellulose, hemicellulose, and lignin are natural reducing agents which widely used to recover manganese. Effects calcination temperature holding time on efficiency impurities were examined. The have significant effect extraction experimental results demonstrated that higher used, percentage obtained, namely 79.58% 87.38%, respectively. XRD (x-ray diffraction) pattern shows phases formed at 700 800 °C Mn3O4 (hausmannite) Mn2O3 (bixbite), morphology sample with showed agglomerate- shaped particles unevenly dispersed. Meanwhile, exhibited agglomerated inhomogeneous size more evenly distributed. Variation recovery process also affects recovery. composition samples variations 3 4 hours 83.88% 89.24%, analysis phase dominated (hausmannite). (bixbite).