湿法冶金
濕法冶金
습법야금
HYDROMETALLURGY OF CHINA
2014年
6期
457-459,472
,共4页
石煤%钒%P204%萃取%多钒酸铵(APV)
石煤%釩%P204%萃取%多釩痠銨(APV)
석매%범%P204%췌취%다범산안(APV)
stone coal%vanadium%P204%extraction%ammonium polyvanadate(APV)
针对石煤熟化水浸浸出液除杂后的溶液钒含量低、杂质含量高、不能直接沉钒的特点，研究了采用溶剂萃取—沉淀—煅烧工艺回收钒。萃取采用6级逆流萃取，4级逆流反萃取，以50％ P204＋10％ TBP＋40％磺化煤油为有机溶剂，水相初始pH＝1．5，Vo ∶Va＝1∶1，萃取时间5 min ，用1．5 mol／L H2 SO4溶液反萃取，反萃取液用NaClO3氧化钒至五价，用氨水调pH沉淀多钒酸铵，多钒酸铵煅烧后得到98．5％的五氧化二钒。
針對石煤熟化水浸浸齣液除雜後的溶液釩含量低、雜質含量高、不能直接沉釩的特點，研究瞭採用溶劑萃取—沉澱—煅燒工藝迴收釩。萃取採用6級逆流萃取，4級逆流反萃取，以50％ P204＋10％ TBP＋40％磺化煤油為有機溶劑，水相初始pH＝1．5，Vo ∶Va＝1∶1，萃取時間5 min ，用1．5 mol／L H2 SO4溶液反萃取，反萃取液用NaClO3氧化釩至五價，用氨水調pH沉澱多釩痠銨，多釩痠銨煅燒後得到98．5％的五氧化二釩。
침대석매숙화수침침출액제잡후적용액범함량저、잡질함량고、불능직접침범적특점，연구료채용용제췌취—침정—단소공예회수범。췌취채용6급역류췌취，4급역류반췌취，이50％ P204＋10％ TBP＋40％광화매유위유궤용제，수상초시pH＝1．5，Vo ∶Va＝1∶1，췌취시간5 min ，용1．5 mol／L H2 SO4용액반췌취，반췌취액용NaClO3양화범지오개，용안수조pH침정다범산안，다범산안단소후득도98．5％적오양화이범。
Recovering of vanadium from the water leaching solution of curied stone coal contains vanadium by solvent‐precipitation process was studied .The vanadium in stone coal is recovered by leaching with water ,six‐stages countercurrent extraction ,forth‐stages back‐extraction and precipitation . The extractant is 50% P204+10% TBP+40% sulfonatedkerosenebr ,back‐extractant is sulfuric acid .At the conditions of solution initial pH of 1 .5 ,Vo ∶Va of 1∶1 ,reaction time of 5 min ,the extraction of vanadium is 99 .1% .Then using sulfuric acid of 1 .5 mol/L to stripping ,and NaClO3 to oxidize stripping solution , ammonium hydroxide to adjust solution pH for precipitating ammonium polyorthovanadate ,and roasting the ammonium polyorthovanadate in muffle furnace ,V2 O5 of 98 .5%can be obtained .
