The pilot scale experiment for recovering V 2O 5 from
stone coal vanadium ore in Zouma was carried out based on the process
and parameters obtained from laboratory scale experiments.The process was consisted of decarbonizing and roasting in air,
sulfuric acid leaching,solid/solution seperation,solvent extraction and precipitating V 2O 5 with ammonium salt.The experiment was carried out in a workshop in which 5 t of V 2O 5 would be produced every year,and continued 34 d.Everyday,2.2 t of stone coal was decarbonized and roasted in air,1.2 t of residue was leached with sulfuric acid,and 2.5 m 3 sulfuric leaching solution was curied by solvent extraction.The results showed that the process and paremeters obtained from laboratory scle experiments were available.When mass fraction of V 2O 5 in stone coal was 0.88%,76.1% of V 2O 5 was leached out,and total recovery of V 2O 5 reached 70.70%.The production,w(V 2O 5) was 99.24%,purity and quality reached national standards and national export standards.