酸浸法从石煤中提钒的中间试验研究

根据“从走马石煤中提钒工艺流程小型试验研究”中选定的工艺流程及参数，采用了石煤脱碳焙烧－－硫酸浸出－－固液分离－－清液萃取－－铵盐沉钒工艺流程，进行了从走马石煤钒矿中提取Ｖ２Ｏ５的中间试验，试验在年产５ｔ精钒产品的生产车间进行。日处理规模为：碳氧化焙烧２．２ｔ石煤钒矿，硫酸浸出１．２ｔ焙灰，溶剂萃取２．５ｍ＾３硫酸浸出液，连续运转３４ｄ。在石煤Ｖ２Ｏ５晶位为０．８８％时，Ｖ２Ｏ５浸邮率为７６．１％

Pilot-scale Experiment for Recovering V2O5from Stone Coal by Acid Leaching

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.